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* [PATCH 4.19 000/195] 4.19.103-stable review
@ 2020-02-10 12:30 Greg Kroah-Hartman
  2020-02-10 12:30 ` [PATCH 4.19 001/195] Revert "drm/sun4i: dsi: Change the start delay calculation" Greg Kroah-Hartman
                   ` (198 more replies)
  0 siblings, 199 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:30 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, torvalds, akpm, linux, shuah, patches,
	ben.hutchings, lkft-triage, stable

This is the start of the stable review cycle for the 4.19.103 release.
There are 195 patches in this series, all will be posted as a response
to this one.  If anyone has any issues with these being applied, please
let me know.

Responses should be made by Wed, 12 Feb 2020 12:18:57 +0000.
Anything received after that time might be too late.

The whole patch series can be found in one patch at:
	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.103-rc1.gz
or in the git tree and branch at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
and the diffstat can be found below.

thanks,

greg k-h

-------------
Pseudo-Shortlog of commits:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Linux 4.19.103-rc1

David Howells <dhowells@redhat.com>
    rxrpc: Fix service call disconnection

Song Liu <songliubraving@fb.com>
    perf/core: Fix mlock accounting in perf_mmap()

Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
    clocksource: Prevent double add_timer_on() for watchdog_timer

Thomas Gleixner <tglx@linutronix.de>
    x86/apic/msi: Plug non-maskable MSI affinity race

Ronnie Sahlberg <lsahlber@redhat.com>
    cifs: fail i/o on soft mounts if sessionsetup errors out

David Hildenbrand <david@redhat.com>
    mm/page_alloc.c: fix uninitialized memmaps on a partially populated last section

Pavel Tatashin <pavel.tatashin@microsoft.com>
    mm: return zero_resv_unavail optimization

Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
    mm: zero remaining unavailable struct pages

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: Play nice with read-only memslots when querying host page size

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: Use vcpu-specific gva->hva translation when querying host page size

Miaohe Lin <linmiaohe@huawei.com>
    KVM: nVMX: vmread should not set rflags to specify success in case of #PF

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: VMX: Add non-canonical check on writes to RTIT address MSRs

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: x86: Use gpa_t for cr2/gpa to fix TDP support on 32-bit KVM

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: x86/mmu: Apply max PA check for MMIO sptes to 32-bit KVM

Josef Bacik <josef@toxicpanda.com>
    btrfs: flush write bio if we loop in extent_write_cache_pages

Wayne Lin <Wayne.Lin@amd.com>
    drm/dp_mst: Remove VCPI while disabling topology mgr

Claudiu Beznea <claudiu.beznea@microchip.com>
    drm: atmel-hlcdc: enable clock before configuring timing engine

Josef Bacik <josef@toxicpanda.com>
    btrfs: free block groups after free'ing fs trees

Anand Jain <anand.jain@oracle.com>
    btrfs: use bool argument in free_root_pointers()

Eric Biggers <ebiggers@google.com>
    ext4: fix deadlock allocating crypto bounce page from mempool

Florian Fainelli <f.fainelli@gmail.com>
    net: dsa: b53: Always use dev->vlan_enabled in b53_configure_vlan()

Harini Katakam <harini.katakam@xilinx.com>
    net: macb: Limit maximum GEM TX length in TSO

Harini Katakam <harini.katakam@xilinx.com>
    net: macb: Remove unnecessary alignment check for TSO

Raed Salem <raeds@mellanox.com>
    net/mlx5: IPsec, fix memory leak at mlx5_fpga_ipsec_delete_sa_ctx

Raed Salem <raeds@mellanox.com>
    net/mlx5: IPsec, Fix esp modify function attribute

Florian Fainelli <f.fainelli@gmail.com>
    net: systemport: Avoid RBUF stuck in Wake-on-LAN mode

Cong Wang <xiyou.wangcong@gmail.com>
    net_sched: fix a resource leak in tcindex_set_parms()

Lorenzo Bianconi <lorenzo@kernel.org>
    net: mvneta: move rx_dropped and rx_errors in per-cpu stats

Florian Fainelli <f.fainelli@gmail.com>
    net: dsa: bcm_sf2: Only 7278 supports 2Gb/sec IMP port

Eric Dumazet <edumazet@google.com>
    bonding/alb: properly access headers in bond_alb_xmit()

Andreas Kemnade <andreas@kemnade.info>
    mfd: rn5t618: Mark ADC control register volatile

Marco Felsch <m.felsch@pengutronix.de>
    mfd: da9062: Fix watchdog compatible string

Dan Carpenter <dan.carpenter@oracle.com>
    ubi: Fix an error pointer dereference in error handling code

Sascha Hauer <s.hauer@pengutronix.de>
    ubi: fastmap: Fix inverted logic in seen selfcheck

Trond Myklebust <trondmy@gmail.com>
    nfsd: Return the correct number of bytes written to the file

Arnd Bergmann <arnd@arndb.de>
    nfsd: fix jiffies/time_t mixup in LRU list

Arnd Bergmann <arnd@arndb.de>
    nfsd: fix delay timer on 32-bit architectures

Yishai Hadas <yishaih@mellanox.com>
    IB/core: Fix ODP get user pages flow

Prabhath Sajeepa <psajeepa@purestorage.com>
    IB/mlx5: Fix outstanding_pi index for GSI qps

Nathan Chancellor <natechancellor@gmail.com>
    net: tulip: Adjust indentation in {dmfe, uli526x}_init_module

Nathan Chancellor <natechancellor@gmail.com>
    net: smc911x: Adjust indentation in smc911x_phy_configure

Nathan Chancellor <natechancellor@gmail.com>
    ppp: Adjust indentation into ppp_async_input

Nathan Chancellor <natechancellor@gmail.com>
    NFC: pn544: Adjust indentation in pn544_hci_check_presence

Nathan Chancellor <natechancellor@gmail.com>
    drm: msm: mdp4: Adjust indentation in mdp4_dsi_encoder_enable

Nathan Chancellor <natechancellor@gmail.com>
    powerpc/44x: Adjust indentation in ibm4xx_denali_fixup_memsize

Nathan Chancellor <natechancellor@gmail.com>
    ext2: Adjust indentation in ext2_fill_super

Nathan Chancellor <natechancellor@gmail.com>
    phy: qualcomm: Adjust indentation in read_poll_timeout

Asutosh Das <asutoshd@codeaurora.org>
    scsi: ufs: Recheck bkops level if bkops is disabled

Nathan Chancellor <natechancellor@gmail.com>
    scsi: qla4xxx: Adjust indentation in qla4xxx_mem_free

Nathan Chancellor <natechancellor@gmail.com>
    scsi: csiostor: Adjust indentation in csio_device_reset

Bart Van Assche <bvanassche@acm.org>
    scsi: qla2xxx: Fix the endianness of the qla82xx_get_fw_size() return type

Erdem Aktas <erdemaktas@google.com>
    percpu: Separate decrypted varaibles anytime encryption can be enabled

Lyude Paul <lyude@redhat.com>
    drm/amd/dm/mst: Ignore payload update failures

Stephen Warren <swarren@nvidia.com>
    clk: tegra: Mark fuse clock as critical

Christian Borntraeger <borntraeger@de.ibm.com>
    KVM: s390: do not clobber registers during guest reset/store status

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: x86: Free wbinvd_dirty_mask if vCPU creation fails

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: x86: Don't let userspace set host-reserved cr4 bits

Boris Ostrovsky <boris.ostrovsky@oracle.com>
    x86/kvm: Be careful not to clear KVM_VCPU_FLUSH_TLB bit

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: PPC: Book3S PR: Free shared page if mmu initialization fails

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: PPC: Book3S HV: Uninit vCPU if vcore creation fails

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: x86: Fix potential put_fpu() w/o load_fpu() on MPX platform

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect x86_decode_insn from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect MSR-based index computations from Spectre-v1/L1TF attacks in x86.c

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect ioapic_read_indirect() from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect MSR-based index computations in pmu.h from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect ioapic_write_indirect() from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect kvm_hv_msr_[get|set]_crash_data() from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect kvm_lapic_reg_write() from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect DR-based index computations from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Protect pmu_intel.c from Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Refactor prefix decoding to prevent Spectre-v1/L1TF attacks

Marios Pomonis <pomonis@google.com>
    KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks

Jens Axboe <axboe@kernel.dk>
    aio: prevent potential eventfd recursion on poll

Jens Axboe <axboe@kernel.dk>
    eventfd: track eventfd_signal() recursion depth

Coly Li <colyli@suse.de>
    bcache: add readahead cache policy options via sysfs interface

Vladis Dronov <vdronov@redhat.com>
    watchdog: fix UAF in reboot notifier handling in watchdog core code

Juergen Gross <jgross@suse.com>
    xen/balloon: Support xend-based toolstack take two

Gavin Shan <gshan@redhat.com>
    tools/kvm_stat: Fix kvm_exit filter name

Sean Young <sean@mess.org>
    media: rc: ensure lirc is initialized before registering input device

Ville Syrjälä <ville.syrjala@linux.intel.com>
    drm/rect: Avoid division by zero

Andreas Gruenbacher <agruenba@redhat.com>
    gfs2: fix O_SYNC write handling

Christoph Hellwig <hch@lst.de>
    gfs2: move setting current->backing_dev_info

Roberto Bergantinos Corpas <rbergant@redhat.com>
    sunrpc: expiry_time should be seconds not timeval

Brian Norris <briannorris@chromium.org>
    mwifiex: fix unbalanced locking in mwifiex_process_country_ie()

Luca Coelho <luciano.coelho@intel.com>
    iwlwifi: don't throw error when trying to remove IGTK

Stephen Warren <swarren@nvidia.com>
    ARM: tegra: Enable PLLP bypass during Tegra124 LP1

Filipe Manana <fdmanana@suse.com>
    Btrfs: fix race between adding and putting tree mod seq elements and nodes

Josef Bacik <josef@toxicpanda.com>
    btrfs: set trans->drity in btrfs_commit_transaction

Filipe Manana <fdmanana@suse.com>
    Btrfs: fix missing hole after hole punching and fsync when using NO_HOLES

Vasily Averin <vvs@virtuozzo.com>
    jbd2_seq_info_next should increase position index

Trond Myklebust <trondmy@gmail.com>
    NFS: Directory page cache pages need to be locked when read

Trond Myklebust <trondmy@gmail.com>
    NFS: Fix memory leaks and corruption in readdir

Arun Easi <aeasi@marvell.com>
    scsi: qla2xxx: Fix unbound NVME response length

Chuhong Yuan <hslester96@gmail.com>
    crypto: picoxcell - adjust the position of tasklet_init and fix missed tasklet_kill

Herbert Xu <herbert@gondor.apana.org.au>
    crypto: api - Fix race condition in crypto_spawn_alg

Tudor Ambarus <tudor.ambarus@microchip.com>
    crypto: atmel-aes - Fix counter overflow in CTR mode

Herbert Xu <herbert@gondor.apana.org.au>
    crypto: pcrypt - Do not clear MAY_SLEEP flag in original request

Ard Biesheuvel <ardb@kernel.org>
    crypto: ccp - set max RSA modulus size for v3 platform devices as well

Toke Høiland-Jørgensen <toke@redhat.com>
    samples/bpf: Don't try to remove user's homedir on clean

Steven Rostedt (VMware) <rostedt@goodmis.org>
    ftrace: Protect ftrace_graph_hash with ftrace_sync

Steven Rostedt (VMware) <rostedt@goodmis.org>
    ftrace: Add comment to why rcu_dereference_sched() is open coded

Amol Grover <frextrite@gmail.com>
    tracing: Annotate ftrace_graph_notrace_hash pointer with __rcu

Amol Grover <frextrite@gmail.com>
    tracing: Annotate ftrace_graph_hash pointer with __rcu

Herbert Xu <herbert@gondor.apana.org.au>
    padata: Remove broken queue flushing

Mikulas Patocka <mpatocka@redhat.com>
    dm writecache: fix incorrect flush sequence when doing SSD mode commit

Mike Snitzer <snitzer@redhat.com>
    dm: fix potential for q->make_request_fn NULL pointer

Milan Broz <gmazyland@gmail.com>
    dm crypt: fix benbi IV constructor crash if used in authenticated mode

Joe Thornber <ejt@redhat.com>
    dm space map common: fix to ensure new block isn't already in use

Dmitry Fomichev <dmitry.fomichev@wdc.com>
    dm zoned: support zone sizes smaller than 128MiB

Michael Ellerman <mpe@ellerman.id.au>
    of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc

Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    PM: core: Fix handling of devices deleted during system-wide resume

Chengguang Xu <cgxu519@mykernel.net>
    f2fs: code cleanup for f2fs_statfs_project()

Chengguang Xu <cgxu519@mykernel.net>
    f2fs: fix miscounted block limit in f2fs_statfs_project()

Chengguang Xu <cgxu519@mykernel.net>
    f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project()

Amir Goldstein <amir73il@gmail.com>
    ovl: fix wrong WARN_ON() in ovl_cache_update_ino()

Sven Van Asbroeck <thesven73@gmail.com>
    power: supply: ltc2941-battery-gauge: fix use-after-free

Quinn Tran <qutran@marvell.com>
    scsi: qla2xxx: Fix mtcp dump collection failure

Geert Uytterhoeven <geert+renesas@glider.be>
    scripts/find-unused-docs: Fix massive false positives

Gilad Ben-Yossef <gilad@benyossef.com>
    crypto: ccree - fix PM race condition

Gilad Ben-Yossef <gilad@benyossef.com>
    crypto: ccree - fix pm wrongful error reporting

Gilad Ben-Yossef <gilad@benyossef.com>
    crypto: ccree - fix backlog memory leak

Herbert Xu <herbert@gondor.apana.org.au>
    crypto: api - Check spawn->alg under lock in crypto_drop_spawn

Samuel Holland <samuel@sholland.org>
    mfd: axp20x: Mark AXP20X_VBUS_IPSOUT_MGMT as volatile

Tianyu Lan <Tianyu.Lan@microsoft.com>
    hv_balloon: Balloon up according to request page number

Michał Mirosław <mirq-linux@rere.qmqm.pl>
    mmc: sdhci-of-at91: fix memleak on clk_get failure

Yurii Monakov <monakov.y@gmail.com>
    PCI: keystone: Fix link training retries initiation

Eric Biggers <ebiggers@google.com>
    crypto: geode-aes - convert to skcipher API and make thread-safe

Zhihao Cheng <chengzhihao1@huawei.com>
    ubifs: Fix deadlock in concurrent bulk-read and writepage

Eric Biggers <ebiggers@google.com>
    ubifs: Fix FS_IOC_SETFLAGS unexpectedly clearing encrypt flag

Eric Biggers <ebiggers@google.com>
    ubifs: don't trigger assertion on invalid no-key filename

Hou Tao <houtao1@huawei.com>
    ubifs: Reject unsupported ioctl flags explicitly

Stephen Boyd <swboyd@chromium.org>
    alarmtimer: Unregister wakeup source when module get fails

Hans de Goede <hdegoede@redhat.com>
    ACPI / battery: Deal better with neither design nor full capacity not being reported

Hans de Goede <hdegoede@redhat.com>
    ACPI / battery: Use design-cap for capacity calculations if full-cap is not available

Hans de Goede <hdegoede@redhat.com>
    ACPI / battery: Deal with design or full capacity being reported as -1

Hans de Goede <hdegoede@redhat.com>
    ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards

Linus Walleij <linus.walleij@linaro.org>
    mmc: spi: Toggle SPI polarity, do not hardcode it

David Engraf <david.engraf@sysgo.com>
    PCI: tegra: Fix return value check of pm_runtime_get_sync()

Steve French <stfrench@microsoft.com>
    smb3: fix signing verification of large reads

Pingfan Liu <kernelfans@gmail.com>
    powerpc/pseries: Advance pfn if section is not present in lmb_is_removable()

Sukadev Bhattiprolu <sukadev@linux.ibm.com>
    powerpc/xmon: don't access ASDR in VMs

Gerald Schaefer <gerald.schaefer@de.ibm.com>
    s390/mm: fix dynamic pagetable upgrade for hugetlbfs

Alexander Lobakin <alobakin@dlink.ru>
    MIPS: boot: fix typo in 'vmlinux.lzma.its' target

Alexander Lobakin <alobakin@dlink.ru>
    MIPS: fix indentation of the 'RELOCS' message

Christoffer Dall <christoffer.dall@arm.com>
    KVM: arm64: Only sign-extend MMIO up to register width

Mark Rutland <mark.rutland@arm.com>
    KVM: arm/arm64: Correct AArch32 SPSR on exception entry

Mark Rutland <mark.rutland@arm.com>
    KVM: arm/arm64: Correct CPSR on exception entry

Mark Rutland <mark.rutland@arm.com>
    KVM: arm64: Correct PSTATE on exception entry

Hans de Goede <hdegoede@redhat.com>
    ALSA: hda: Add Clevo W65_67SB the power_save blacklist

Mika Westerberg <mika.westerberg@linux.intel.com>
    platform/x86: intel_scu_ipc: Fix interrupt support

Kevin Hao <haokexin@gmail.com>
    irqdomain: Fix a memory leak in irq_domain_push_irq()

Gustavo A. R. Silva <gustavo@embeddedor.com>
    lib/test_kasan.c: fix memory leak in kmalloc_oob_krealloc_more()

Helen Koike <helen.koike@collabora.com>
    media: v4l2-rect.h: fix v4l2_rect_map_inside() top/left adjustments

Arnd Bergmann <arnd@arndb.de>
    media: v4l2-core: compat: ignore native command codes

John Hubbard <jhubbard@nvidia.com>
    media/v4l2-core: set pages dirty upon releasing DMA buffers

Yang Shi <yang.shi@linux.alibaba.com>
    mm: move_pages: report the number of non-attempted pages

Dan Williams <dan.j.williams@intel.com>
    mm/memory_hotplug: fix remove_memory() lockdep splat

Takashi Iwai <tiwai@suse.de>
    ALSA: dummy: Fix PCM format loop in proc output

Takashi Iwai <tiwai@suse.de>
    ALSA: usb-audio: Fix endianess in descriptor validation

Bryan O'Donoghue <bryan.odonoghue@linaro.org>
    usb: gadget: f_ecm: Use atomic_t to track in-flight request

Bryan O'Donoghue <bryan.odonoghue@linaro.org>
    usb: gadget: f_ncm: Use atomic_t to track in-flight request

Roger Quadros <rogerq@ti.com>
    usb: gadget: legacy: set max_speed to super-speed

Jun Li <jun.li@nxp.com>
    usb: typec: tcpci: mask event interrupts when remove driver

Navid Emamdoost <navid.emamdoost@gmail.com>
    brcmfmac: Fix memory leak in brcmf_usbdev_qinit

Eric Dumazet <edumazet@google.com>
    rcu: Avoid data-race in rcu_gp_fqs_check_wake()

Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
    tracing: Fix sched switch start/stop refcount racy updates

Lu Shuaibing <shuaibinglu@126.com>
    ipc/msg.c: consolidate all xxxctl_down() functions

Oliver Neukum <oneukum@suse.com>
    mfd: dln2: More sanity checking for endpoints

Will Deacon <will@kernel.org>
    media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors

David Howells <dhowells@redhat.com>
    rxrpc: Fix NULL pointer deref due to call->conn being cleared on disconnect

David Howells <dhowells@redhat.com>
    rxrpc: Fix missing active use pinning of rxrpc_local object

David Howells <dhowells@redhat.com>
    rxrpc: Fix insufficient receive notification generation

David Howells <dhowells@redhat.com>
    rxrpc: Fix use-after-free in rxrpc_put_local()

Eric Dumazet <edumazet@google.com>
    tcp: clear tp->segs_{in|out} in tcp_disconnect()

Eric Dumazet <edumazet@google.com>
    tcp: clear tp->data_segs{in|out} in tcp_disconnect()

Eric Dumazet <edumazet@google.com>
    tcp: clear tp->delivered in tcp_disconnect()

Eric Dumazet <edumazet@google.com>
    tcp: clear tp->total_retrans in tcp_disconnect()

Michael Chan <michael.chan@broadcom.com>
    bnxt_en: Fix TC queue mapping.

Nicolin Chen <nicoleotsuka@gmail.com>
    net: stmmac: Delete txtimer in suspend()

Cong Wang <xiyou.wangcong@gmail.com>
    net_sched: fix an OOB access in cls_tcindex

Eric Dumazet <edumazet@google.com>
    net: hsr: fix possible NULL deref in hsr_handle_frame()

Ridge Kennedy <ridge.kennedy@alliedtelesis.co.nz>
    l2tp: Allow duplicate session creation with UDP

Taehee Yoo <ap420073@gmail.com>
    gtp: use __GFP_NOWARN to avoid memalloc warning

Eric Dumazet <edumazet@google.com>
    cls_rsvp: fix rsvp_policy

Arnd Bergmann <arnd@arndb.de>
    sparc32: fix struct ipc64_perm type definition

Luca Coelho <luciano.coelho@intel.com>
    iwlwifi: mvm: fix NVM check for 3168 devices

John Ogness <john.ogness@linutronix.de>
    printk: fix exclusive_console replaying

Jan Kara <jack@suse.cz>
    udf: Allow writing to 'Rewritable' partitions

Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
    x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR

Gang He <GHe@suse.com>
    ocfs2: fix oops when writing cloned file

Johan Hovold <johan@kernel.org>
    media: iguanair: fix endpoint sanity check

YueHaibing <yuehaibing@huawei.com>
    kernel/module: Fix memleak in module_add_modinfo_attrs()

Miklos Szeredi <mszeredi@redhat.com>
    ovl: fix lseek overflow on 32bit

Icenowy Zheng <icenowy@aosc.io>
    Revert "drm/sun4i: dsi: Change the start delay calculation"


-------------

Diffstat:

 Makefile                                           |    4 +-
 arch/arm/include/asm/kvm_emulate.h                 |   22 +
 arch/arm/include/asm/kvm_mmio.h                    |    2 +
 arch/arm/mach-tegra/sleep-tegra30.S                |   11 +
 arch/arm64/include/asm/kvm_emulate.h               |   37 +
 arch/arm64/include/asm/kvm_mmio.h                  |    6 +-
 arch/arm64/include/asm/ptrace.h                    |    1 +
 arch/arm64/include/uapi/asm/ptrace.h               |    1 +
 arch/arm64/kvm/inject_fault.c                      |   70 +-
 arch/mips/Makefile.postlink                        |    2 +-
 arch/mips/boot/Makefile                            |    2 +-
 arch/powerpc/Kconfig                               |    1 +
 arch/powerpc/boot/4xx.c                            |    2 +-
 arch/powerpc/kvm/book3s_hv.c                       |    4 +-
 arch/powerpc/kvm/book3s_pr.c                       |    4 +-
 arch/powerpc/platforms/pseries/hotplug-memory.c    |    4 +-
 arch/powerpc/xmon/xmon.c                           |    9 +-
 arch/s390/include/asm/page.h                       |    2 +
 arch/s390/kvm/kvm-s390.c                           |    6 +-
 arch/s390/mm/hugetlbpage.c                         |  100 +-
 arch/sparc/include/uapi/asm/ipcbuf.h               |   22 +-
 arch/x86/include/asm/apic.h                        |    8 +
 arch/x86/include/asm/kvm_host.h                    |    8 +-
 arch/x86/kernel/apic/msi.c                         |  128 +-
 arch/x86/kernel/cpu/tsx.c                          |   13 +-
 arch/x86/kvm/emulate.c                             |   27 +-
 arch/x86/kvm/hyperv.c                              |   10 +-
 arch/x86/kvm/i8259.c                               |    6 +-
 arch/x86/kvm/ioapic.c                              |   15 +-
 arch/x86/kvm/lapic.c                               |   13 +-
 arch/x86/kvm/mmu.c                                 |   78 +-
 arch/x86/kvm/mmutrace.h                            |   12 +-
 arch/x86/kvm/mtrr.c                                |    8 +-
 arch/x86/kvm/paging_tmpl.h                         |   25 +-
 arch/x86/kvm/pmu.h                                 |   18 +-
 arch/x86/kvm/pmu_intel.c                           |   24 +-
 arch/x86/kvm/vmx.c                                 |    4 +-
 arch/x86/kvm/vmx/vmx.c                             | 8033 ++++++++++++++++++++
 arch/x86/kvm/x86.c                                 |  101 +-
 arch/x86/kvm/x86.h                                 |    2 +-
 crypto/algapi.c                                    |   22 +-
 crypto/api.c                                       |    3 +-
 crypto/internal.h                                  |    1 -
 crypto/pcrypt.c                                    |    1 -
 drivers/acpi/battery.c                             |   75 +-
 drivers/acpi/video_detect.c                        |   13 +
 drivers/base/power/main.c                          |   42 +-
 drivers/clk/tegra/clk-tegra-periph.c               |    6 +-
 drivers/crypto/atmel-aes.c                         |   37 +-
 drivers/crypto/ccp/ccp-dev-v3.c                    |    1 +
 drivers/crypto/ccree/cc_driver.h                   |    1 +
 drivers/crypto/ccree/cc_pm.c                       |   30 +-
 drivers/crypto/ccree/cc_request_mgr.c              |   51 +-
 drivers/crypto/ccree/cc_request_mgr.h              |    8 -
 drivers/crypto/geode-aes.c                         |  442 +-
 drivers/crypto/geode-aes.h                         |   15 +-
 drivers/crypto/picoxcell_crypto.c                  |   15 +-
 .../drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c  |   13 +-
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c     |    8 +-
 drivers/gpu/drm/drm_dp_mst_topology.c              |   12 +
 drivers/gpu/drm/drm_rect.c                         |    7 +-
 drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c   |    2 +-
 drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c             |    3 +-
 drivers/hv/hv_balloon.c                            |   13 +-
 drivers/infiniband/core/umem_odp.c                 |    2 +-
 drivers/infiniband/hw/mlx5/gsi.c                   |    3 +-
 drivers/md/bcache/bcache.h                         |    3 +
 drivers/md/bcache/request.c                        |   17 +-
 drivers/md/bcache/sysfs.c                          |   22 +
 drivers/md/dm-crypt.c                              |   10 +-
 drivers/md/dm-writecache.c                         |   41 +-
 drivers/md/dm-zoned-metadata.c                     |   23 +-
 drivers/md/dm.c                                    |    9 +-
 drivers/md/persistent-data/dm-space-map-common.c   |   27 +
 drivers/md/persistent-data/dm-space-map-common.h   |    2 +
 drivers/md/persistent-data/dm-space-map-disk.c     |    6 +-
 drivers/md/persistent-data/dm-space-map-metadata.c |    5 +-
 drivers/media/rc/iguanair.c                        |    2 +-
 drivers/media/rc/rc-main.c                         |   27 +-
 drivers/media/usb/uvc/uvc_driver.c                 |   12 +
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c      |  148 +-
 drivers/media/v4l2-core/videobuf-dma-sg.c          |    5 +-
 drivers/mfd/axp20x.c                               |    2 +-
 drivers/mfd/da9062-core.c                          |    2 +-
 drivers/mfd/dln2.c                                 |   13 +-
 drivers/mfd/rn5t618.c                              |    1 +
 drivers/mmc/host/mmc_spi.c                         |   11 +-
 drivers/mmc/host/sdhci-of-at91.c                   |    9 +-
 drivers/mtd/ubi/fastmap.c                          |   23 +-
 drivers/net/bonding/bond_alb.c                     |   44 +-
 drivers/net/dsa/b53/b53_common.c                   |    2 +-
 drivers/net/dsa/bcm_sf2.c                          |    4 +-
 drivers/net/ethernet/broadcom/bcmsysport.c         |    3 +
 drivers/net/ethernet/broadcom/bnxt/bnxt.c          |    2 +-
 drivers/net/ethernet/cadence/macb_main.c           |   14 +-
 drivers/net/ethernet/dec/tulip/dmfe.c              |    7 +-
 drivers/net/ethernet/dec/tulip/uli526x.c           |    4 +-
 drivers/net/ethernet/marvell/mvneta.c              |   27 +-
 .../net/ethernet/mellanox/mlx5/core/fpga/ipsec.c   |    3 +-
 drivers/net/ethernet/smsc/smc911x.c                |    2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  |    4 +
 drivers/net/gtp.c                                  |    4 +-
 drivers/net/ppp/ppp_async.c                        |   18 +-
 .../net/wireless/broadcom/brcm80211/brcmfmac/usb.c |    1 +
 drivers/net/wireless/intel/iwlwifi/mvm/nvm.c       |    2 +-
 drivers/net/wireless/intel/iwlwifi/mvm/sta.c       |   10 +-
 drivers/net/wireless/marvell/mwifiex/sta_ioctl.c   |    1 +
 drivers/nfc/pn544/pn544.c                          |    2 +-
 drivers/of/Kconfig                                 |    4 +
 drivers/of/address.c                               |    6 +-
 drivers/pci/controller/dwc/pci-keystone-dw.c       |    2 +-
 drivers/pci/controller/pci-tegra.c                 |    2 +-
 drivers/phy/qualcomm/phy-qcom-apq8064-sata.c       |    2 +-
 drivers/platform/x86/intel_scu_ipc.c               |   21 +-
 drivers/power/supply/ltc2941-battery-gauge.c       |    2 +-
 drivers/scsi/csiostor/csio_scsi.c                  |    2 +-
 drivers/scsi/qla2xxx/qla_dbg.c                     |    6 -
 drivers/scsi/qla2xxx/qla_dbg.h                     |    6 +
 drivers/scsi/qla2xxx/qla_isr.c                     |   12 +
 drivers/scsi/qla2xxx/qla_mbx.c                     |    3 +-
 drivers/scsi/qla2xxx/qla_nx.c                      |    7 +-
 drivers/scsi/qla4xxx/ql4_os.c                      |    2 +-
 drivers/scsi/ufs/ufshcd.c                          |    3 +
 drivers/usb/gadget/function/f_ecm.c                |   16 +-
 drivers/usb/gadget/function/f_ncm.c                |   17 +-
 drivers/usb/gadget/legacy/cdc2.c                   |    2 +-
 drivers/usb/gadget/legacy/g_ffs.c                  |    2 +-
 drivers/usb/gadget/legacy/multi.c                  |    2 +-
 drivers/usb/gadget/legacy/ncm.c                    |    2 +-
 drivers/usb/typec/tcpci.c                          |    6 +
 drivers/watchdog/watchdog_core.c                   |   35 +
 drivers/watchdog/watchdog_dev.c                    |   36 +-
 drivers/xen/xen-balloon.c                          |    2 +-
 fs/aio.c                                           |   20 +-
 fs/btrfs/ctree.c                                   |    8 +-
 fs/btrfs/ctree.h                                   |    6 +-
 fs/btrfs/delayed-ref.c                             |    8 +-
 fs/btrfs/disk-io.c                                 |   22 +-
 fs/btrfs/extent_io.c                               |    8 +
 fs/btrfs/tests/btrfs-tests.c                       |    1 -
 fs/btrfs/transaction.c                             |    8 +
 fs/btrfs/tree-log.c                                |  388 +-
 fs/cifs/smb2pdu.c                                  |   14 +-
 fs/eventfd.c                                       |   15 +
 fs/ext2/super.c                                    |    6 +-
 fs/ext4/page-io.c                                  |   19 +-
 fs/f2fs/super.c                                    |   14 +-
 fs/gfs2/file.c                                     |   72 +-
 fs/jbd2/journal.c                                  |    1 +
 fs/nfs/dir.c                                       |   47 +-
 fs/nfsd/nfs4layouts.c                              |    2 +-
 fs/nfsd/nfs4state.c                                |    2 +-
 fs/nfsd/state.h                                    |    2 +-
 fs/nfsd/vfs.c                                      |    1 +
 fs/ocfs2/file.c                                    |   14 +-
 fs/overlayfs/file.c                                |    2 +-
 fs/overlayfs/readdir.c                             |    8 +-
 fs/ubifs/dir.c                                     |    2 +
 fs/ubifs/file.c                                    |    4 +-
 fs/ubifs/ioctl.c                                   |   11 +-
 fs/udf/super.c                                     |    1 -
 include/linux/eventfd.h                            |   14 +
 include/linux/irq.h                                |   18 +
 include/linux/irqdomain.h                          |    7 +
 include/linux/kvm_host.h                           |    8 +-
 include/linux/memblock.h                           |   15 -
 include/linux/percpu-defs.h                        |    3 +-
 include/media/v4l2-rect.h                          |    8 +-
 include/net/ipx.h                                  |    5 -
 ipc/msg.c                                          |   19 +-
 kernel/events/core.c                               |   10 +-
 kernel/irq/debugfs.c                               |    1 +
 kernel/irq/irqdomain.c                             |    1 +
 kernel/irq/msi.c                                   |    5 +-
 kernel/module.c                                    |    2 +
 kernel/padata.c                                    |   46 +-
 kernel/printk/printk.c                             |    4 +-
 kernel/rcu/tree_plugin.h                           |   11 +-
 kernel/time/alarmtimer.c                           |    8 +-
 kernel/time/clocksource.c                          |   11 +-
 kernel/trace/ftrace.c                              |   15 +-
 kernel/trace/trace.h                               |   29 +-
 kernel/trace/trace_sched_switch.c                  |    4 +-
 lib/test_kasan.c                                   |    1 +
 mm/memory_hotplug.c                                |    9 +-
 mm/migrate.c                                       |   25 +-
 mm/page_alloc.c                                    |   64 +-
 net/hsr/hsr_slave.c                                |    2 +
 net/ipv4/tcp.c                                     |    6 +
 net/l2tp/l2tp_core.c                               |    7 +-
 net/rxrpc/af_rxrpc.c                               |    2 +
 net/rxrpc/ar-internal.h                            |   11 +
 net/rxrpc/call_object.c                            |    4 +-
 net/rxrpc/conn_client.c                            |    3 +-
 net/rxrpc/conn_event.c                             |   31 +-
 net/rxrpc/conn_object.c                            |    3 +-
 net/rxrpc/input.c                                  |    6 +-
 net/rxrpc/local_object.c                           |   23 +-
 net/rxrpc/output.c                                 |   27 +-
 net/rxrpc/peer_event.c                             |   42 +-
 net/sched/cls_rsvp.h                               |    6 +-
 net/sched/cls_tcindex.c                            |   43 +-
 net/sunrpc/auth_gss/svcauth_gss.c                  |    4 +
 samples/bpf/Makefile                               |    2 +-
 scripts/find-unused-docs.sh                        |    2 +-
 sound/drivers/dummy.c                              |    2 +-
 sound/pci/hda/hda_intel.c                          |    2 +
 sound/usb/validate.c                               |    6 +-
 tools/kvm/kvm_stat/kvm_stat                        |    8 +-
 virt/kvm/arm/aarch32.c                             |  117 +-
 virt/kvm/arm/mmio.c                                |    6 +
 virt/kvm/async_pf.c                                |   10 +-
 virt/kvm/kvm_main.c                                |    4 +-
 213 files changed, 10303 insertions(+), 1570 deletions(-)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 001/195] Revert "drm/sun4i: dsi: Change the start delay calculation"
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
@ 2020-02-10 12:30 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 002/195] ovl: fix lseek overflow on 32bit Greg Kroah-Hartman
                   ` (197 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:30 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Icenowy Zheng, Jagan Teki,
	Maxime Ripard, Sasha Levin

From: Icenowy Zheng <icenowy@aosc.io>

[ Upstream commit a00d17e0a71ae2e4fdaac46e1c12785d3346c3f2 ]

This reverts commit da676c6aa6413d59ab0a80c97bbc273025e640b2.

The original commit adds a start parameter to the calculation of the
start delay according to some old BSP versions from Allwinner. However,
there're two ways to add this delay -- add it in DSI controller or add
it in the TCON. Add it in both controllers won't work.

The code before this commit is picked from new versions of BSP kernel,
which has a comment for the 1 that says "put start_delay to tcon". By
checking the sun4i_tcon0_mode_set_cpu() in sun4i_tcon driver, it has
already added this delay, so we shouldn't repeat to add the delay in DSI
controller, otherwise the timing won't match.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191001080253.6135-2-icenowy@aosc.io
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index 97a0573cc5145..79eb11cd185d1 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -357,8 +357,7 @@ static void sun6i_dsi_inst_init(struct sun6i_dsi *dsi,
 static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi,
 					   struct drm_display_mode *mode)
 {
-	u16 start = clamp(mode->vtotal - mode->vdisplay - 10, 8, 100);
-	u16 delay = mode->vtotal - (mode->vsync_end - mode->vdisplay) + start;
+	u16 delay = mode->vtotal - (mode->vsync_end - mode->vdisplay) + 1;
 
 	if (delay > mode->vtotal)
 		delay = delay % mode->vtotal;
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 002/195] ovl: fix lseek overflow on 32bit
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
  2020-02-10 12:30 ` [PATCH 4.19 001/195] Revert "drm/sun4i: dsi: Change the start delay calculation" Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 003/195] kernel/module: Fix memleak in module_add_modinfo_attrs() Greg Kroah-Hartman
                   ` (196 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Boris Gjenero, Miklos Szeredi, Sasha Levin

From: Miklos Szeredi <mszeredi@redhat.com>

[ Upstream commit a4ac9d45c0cd14a2adc872186431c79804b77dbf ]

ovl_lseek() is using ssize_t to return the value from vfs_llseek().  On a
32-bit kernel ssize_t is a 32-bit signed int, which overflows above 2 GB.

Assign the return value of vfs_llseek() to loff_t to fix this.

Reported-by: Boris Gjenero <boris.gjenero@gmail.com>
Fixes: 9e46b840c705 ("ovl: support stacked SEEK_HOLE/SEEK_DATA")
Cc: <stable@vger.kernel.org> # v4.19
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/overlayfs/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 0bd276e4ccbee..fa5ac5de807c5 100644
--- a/fs/overlayfs/file.c
+++ b/fs/overlayfs/file.c
@@ -149,7 +149,7 @@ static loff_t ovl_llseek(struct file *file, loff_t offset, int whence)
 	struct inode *inode = file_inode(file);
 	struct fd real;
 	const struct cred *old_cred;
-	ssize_t ret;
+	loff_t ret;
 
 	/*
 	 * The two special cases below do not need to involve real fs,
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 003/195] kernel/module: Fix memleak in module_add_modinfo_attrs()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
  2020-02-10 12:30 ` [PATCH 4.19 001/195] Revert "drm/sun4i: dsi: Change the start delay calculation" Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 002/195] ovl: fix lseek overflow on 32bit Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 004/195] media: iguanair: fix endpoint sanity check Greg Kroah-Hartman
                   ` (195 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Miroslav Benes, YueHaibing,
	Jessica Yu, Sasha Levin

From: YueHaibing <yuehaibing@huawei.com>

[ Upstream commit f6d061d617124abbd55396a3bc37b9bf7d33233c ]

In module_add_modinfo_attrs() if sysfs_create_file() fails
on the first iteration of the loop (so i = 0), we forget to
free the modinfo_attrs.

Fixes: bc6f2a757d52 ("kernel/module: Fix mem leak in module_add_modinfo_attrs")
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/module.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/module.c b/kernel/module.c
index d3aaec62c1423..70a75a7216abb 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1729,6 +1729,8 @@ static int module_add_modinfo_attrs(struct module *mod)
 error_out:
 	if (i > 0)
 		module_remove_modinfo_attrs(mod, --i);
+	else
+		kfree(mod->modinfo_attrs);
 	return error;
 }
 
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 004/195] media: iguanair: fix endpoint sanity check
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (2 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 003/195] kernel/module: Fix memleak in module_add_modinfo_attrs() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 005/195] ocfs2: fix oops when writing cloned file Greg Kroah-Hartman
                   ` (194 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Oliver Neukum, Johan Hovold,
	Sean Young, Mauro Carvalho Chehab, Sasha Levin

From: Johan Hovold <johan@kernel.org>

[ Upstream commit 1b257870a78b0a9ce98fdfb052c58542022ffb5b ]

Make sure to use the current alternate setting, which need not be the
first one by index, when verifying the endpoint descriptors and
initialising the URBs.

Failing to do so could cause the driver to misbehave or trigger a WARN()
in usb_submit_urb() that kernels with panic_on_warn set would choke on.

Fixes: 26ff63137c45 ("[media] Add support for the IguanaWorks USB IR Transceiver")
Fixes: ab1cbdf159be ("media: iguanair: add sanity checks")
Cc: stable <stable@vger.kernel.org>     # 3.6
Cc: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/rc/iguanair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c
index 6f3030b2054d0..1df9522c30fa0 100644
--- a/drivers/media/rc/iguanair.c
+++ b/drivers/media/rc/iguanair.c
@@ -424,7 +424,7 @@ static int iguanair_probe(struct usb_interface *intf,
 	int ret, pipein, pipeout;
 	struct usb_host_interface *idesc;
 
-	idesc = intf->altsetting;
+	idesc = intf->cur_altsetting;
 	if (idesc->desc.bNumEndpoints < 2)
 		return -ENODEV;
 
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 005/195] ocfs2: fix oops when writing cloned file
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (3 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 004/195] media: iguanair: fix endpoint sanity check Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 006/195] x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR Greg Kroah-Hartman
                   ` (193 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Gang He, Joseph Qi, Mark Fasheh,
	Joel Becker, Junxiao Bi, Changwei Ge, Jun Piao, Andrew Morton,
	Linus Torvalds, Sasha Levin

From: Gang He <GHe@suse.com>

[ Upstream commit 2d797e9ff95ecbcf0a83d657928ed20579444857 ]

Writing a cloned file triggers a kernel oops and the user-space command
process is also killed by the system.  The bug can be reproduced stably
via:

1) create a file under ocfs2 file system directory.

  journalctl -b > aa.txt

2) create a cloned file for this file.

  reflink aa.txt bb.txt

3) write the cloned file with dd command.

  dd if=/dev/zero of=bb.txt bs=512 count=1 conv=notrunc

The dd command is killed by the kernel, then you can see the oops message
via dmesg command.

[  463.875404] BUG: kernel NULL pointer dereference, address: 0000000000000028
[  463.875413] #PF: supervisor read access in kernel mode
[  463.875416] #PF: error_code(0x0000) - not-present page
[  463.875418] PGD 0 P4D 0
[  463.875425] Oops: 0000 [#1] SMP PTI
[  463.875431] CPU: 1 PID: 2291 Comm: dd Tainted: G           OE     5.3.16-2-default
[  463.875433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[  463.875500] RIP: 0010:ocfs2_refcount_cow+0xa4/0x5d0 [ocfs2]
[  463.875505] Code: 06 89 6c 24 38 89 eb f6 44 24 3c 02 74 be 49 8b 47 28
[  463.875508] RSP: 0018:ffffa2cb409dfce8 EFLAGS: 00010202
[  463.875512] RAX: ffff8b1ebdca8000 RBX: 0000000000000001 RCX: ffff8b1eb73a9df0
[  463.875515] RDX: 0000000000056a01 RSI: 0000000000000000 RDI: 0000000000000000
[  463.875517] RBP: 0000000000000001 R08: ffff8b1eb73a9de0 R09: 0000000000000000
[  463.875520] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
[  463.875522] R13: ffff8b1eb922f048 R14: 0000000000000000 R15: ffff8b1eb922f048
[  463.875526] FS:  00007f8f44d15540(0000) GS:ffff8b1ebeb00000(0000) knlGS:0000000000000000
[  463.875529] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  463.875532] CR2: 0000000000000028 CR3: 000000003c17a000 CR4: 00000000000006e0
[  463.875546] Call Trace:
[  463.875596]  ? ocfs2_inode_lock_full_nested+0x18b/0x960 [ocfs2]
[  463.875648]  ocfs2_file_write_iter+0xaf8/0xc70 [ocfs2]
[  463.875672]  new_sync_write+0x12d/0x1d0
[  463.875688]  vfs_write+0xad/0x1a0
[  463.875697]  ksys_write+0xa1/0xe0
[  463.875710]  do_syscall_64+0x60/0x1f0
[  463.875743]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  463.875758] RIP: 0033:0x7f8f4482ed44
[  463.875762] Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 80 00 00 00
[  463.875765] RSP: 002b:00007fff300a79d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  463.875769] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8f4482ed44
[  463.875771] RDX: 0000000000000200 RSI: 000055f771b5c000 RDI: 0000000000000001
[  463.875774] RBP: 0000000000000200 R08: 00007f8f44af9c78 R09: 0000000000000003
[  463.875776] R10: 000000000000089f R11: 0000000000000246 R12: 000055f771b5c000
[  463.875779] R13: 0000000000000200 R14: 0000000000000000 R15: 000055f771b5c000

This regression problem was introduced by commit e74540b28556 ("ocfs2:
protect extent tree in ocfs2_prepare_inode_for_write()").

Link: http://lkml.kernel.org/r/20200121050153.13290-1-ghe@suse.com
Fixes: e74540b28556 ("ocfs2: protect extent tree in ocfs2_prepare_inode_for_write()").
Signed-off-by: Gang He <ghe@suse.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ocfs2/file.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index a3e077fcfeb9b..fbd70111a2f12 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2109,17 +2109,15 @@ static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos)
 static int ocfs2_inode_lock_for_extent_tree(struct inode *inode,
 					    struct buffer_head **di_bh,
 					    int meta_level,
-					    int overwrite_io,
 					    int write_sem,
 					    int wait)
 {
 	int ret = 0;
 
 	if (wait)
-		ret = ocfs2_inode_lock(inode, NULL, meta_level);
+		ret = ocfs2_inode_lock(inode, di_bh, meta_level);
 	else
-		ret = ocfs2_try_inode_lock(inode,
-			overwrite_io ? NULL : di_bh, meta_level);
+		ret = ocfs2_try_inode_lock(inode, di_bh, meta_level);
 	if (ret < 0)
 		goto out;
 
@@ -2144,6 +2142,7 @@ static int ocfs2_inode_lock_for_extent_tree(struct inode *inode,
 
 out_unlock:
 	brelse(*di_bh);
+	*di_bh = NULL;
 	ocfs2_inode_unlock(inode, meta_level);
 out:
 	return ret;
@@ -2186,7 +2185,6 @@ static int ocfs2_prepare_inode_for_write(struct file *file,
 		ret = ocfs2_inode_lock_for_extent_tree(inode,
 						       &di_bh,
 						       meta_level,
-						       overwrite_io,
 						       write_sem,
 						       wait);
 		if (ret < 0) {
@@ -2244,13 +2242,13 @@ static int ocfs2_prepare_inode_for_write(struct file *file,
 							   &di_bh,
 							   meta_level,
 							   write_sem);
+			meta_level = 1;
+			write_sem = 1;
 			ret = ocfs2_inode_lock_for_extent_tree(inode,
 							       &di_bh,
 							       meta_level,
-							       overwrite_io,
-							       1,
+							       write_sem,
 							       wait);
-			write_sem = 1;
 			if (ret < 0) {
 				if (ret != -EAGAIN)
 					mlog_errno(ret);
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 006/195] x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (4 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 005/195] ocfs2: fix oops when writing cloned file Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 007/195] udf: Allow writing to Rewritable partitions Greg Kroah-Hartman
                   ` (192 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Pawan Gupta, Thomas Gleixner,
	Neelima Krishnan, Dave Hansen, Josh Poimboeuf, Sasha Levin

From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>

[ Upstream commit 5efc6fa9044c3356d6046c6e1da6d02572dbed6b ]

/proc/cpuinfo currently reports Hardware Lock Elision (HLE) feature to
be present on boot cpu even if it was disabled during the bootup. This
is because cpuinfo_x86->x86_capability HLE bit is not updated after TSX
state is changed via the new MSR IA32_TSX_CTRL.

Update the cached HLE bit also since it is expected to change after an
update to CPUID_CLEAR bit in MSR IA32_TSX_CTRL.

Fixes: 95c5824f75f3 ("x86/cpu: Add a "tsx=" cmdline option with TSX disabled by default")
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Neelima Krishnan <neelima.krishnan@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/2529b99546294c893dfa1c89e2b3e46da3369a59.1578685425.git.pawan.kumar.gupta@linux.intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/kernel/cpu/tsx.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/cpu/tsx.c b/arch/x86/kernel/cpu/tsx.c
index 3e20d322bc98b..032509adf9de9 100644
--- a/arch/x86/kernel/cpu/tsx.c
+++ b/arch/x86/kernel/cpu/tsx.c
@@ -115,11 +115,12 @@ void __init tsx_init(void)
 		tsx_disable();
 
 		/*
-		 * tsx_disable() will change the state of the
-		 * RTM CPUID bit.  Clear it here since it is now
-		 * expected to be not set.
+		 * tsx_disable() will change the state of the RTM and HLE CPUID
+		 * bits. Clear them here since they are now expected to be not
+		 * set.
 		 */
 		setup_clear_cpu_cap(X86_FEATURE_RTM);
+		setup_clear_cpu_cap(X86_FEATURE_HLE);
 	} else if (tsx_ctrl_state == TSX_CTRL_ENABLE) {
 
 		/*
@@ -131,10 +132,10 @@ void __init tsx_init(void)
 		tsx_enable();
 
 		/*
-		 * tsx_enable() will change the state of the
-		 * RTM CPUID bit.  Force it here since it is now
-		 * expected to be set.
+		 * tsx_enable() will change the state of the RTM and HLE CPUID
+		 * bits. Force them here since they are now expected to be set.
 		 */
 		setup_force_cpu_cap(X86_FEATURE_RTM);
+		setup_force_cpu_cap(X86_FEATURE_HLE);
 	}
 }
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 007/195] udf: Allow writing to Rewritable partitions
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (5 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 006/195] x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 008/195] printk: fix exclusive_console replaying Greg Kroah-Hartman
                   ` (191 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Pali Rohár, Jan Kara, Sasha Levin

From: Jan Kara <jack@suse.cz>

[ Upstream commit 15fb05fd286ac57a0802d71624daeb5c1c2d5b07 ]

UDF 2.60 standard states in section 2.2.14.2:

    A partition with Access Type 3 (rewritable) shall define a Freed
    Space Bitmap or a Freed Space Table, see 2.3.3. All other partitions
    shall not define a Freed Space Bitmap or a Freed Space Table.

    Rewritable partitions are used on media that require some form of
    preprocessing before re-writing data (for example legacy MO). Such
    partitions shall use Access Type 3.

    Overwritable partitions are used on media that do not require
    preprocessing before overwriting data (for example: CD-RW, DVD-RW,
    DVD+RW, DVD-RAM, BD-RE, HD DVD-Rewritable). Such partitions shall
    use Access Type 4.

however older versions of the standard didn't have this wording and
there are tools out there that create UDF filesystems with rewritable
partitions but that don't contain a Freed Space Bitmap or a Freed Space
Table on media that does not require pre-processing before overwriting a
block. So instead of forcing media with rewritable partition read-only,
base this decision on presence of a Freed Space Bitmap or a Freed Space
Table.

Reported-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Fixes: b085fbe2ef7f ("udf: Fix crash during mount")
Link: https://lore.kernel.org/linux-fsdevel/20200112144735.hj2emsoy4uwsouxz@pali
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/udf/super.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 7af011dc9ae8a..6fd0f14e9dd22 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -999,7 +999,6 @@ static int check_partition_desc(struct super_block *sb,
 	switch (le32_to_cpu(p->accessType)) {
 	case PD_ACCESS_TYPE_READ_ONLY:
 	case PD_ACCESS_TYPE_WRITE_ONCE:
-	case PD_ACCESS_TYPE_REWRITABLE:
 	case PD_ACCESS_TYPE_NONE:
 		goto force_ro;
 	}
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 008/195] printk: fix exclusive_console replaying
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (6 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 007/195] udf: Allow writing to Rewritable partitions Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 009/195] iwlwifi: mvm: fix NVM check for 3168 devices Greg Kroah-Hartman
                   ` (190 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Steven Rostedt, John Ogness,
	Sergey Senozhatsky, Petr Mladek, Sasha Levin

From: John Ogness <john.ogness@linutronix.de>

[ Upstream commit def97da136515cb289a14729292c193e0a93bc64 ]

Commit f92b070f2dc8 ("printk: Do not miss new messages when replaying
the log") introduced a new variable @exclusive_console_stop_seq to
store when an exclusive console should stop printing. It should be
set to the @console_seq value at registration. However, @console_seq
is previously set to @syslog_seq so that the exclusive console knows
where to begin. This results in the exclusive console immediately
reactivating all the other consoles and thus repeating the messages
for those consoles.

Set @console_seq after @exclusive_console_stop_seq has stored the
current @console_seq value.

Fixes: f92b070f2dc8 ("printk: Do not miss new messages when replaying the log")
Link: http://lkml.kernel.org/r/20191219115322.31160-1-john.ogness@linutronix.de
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/printk/printk.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 845efadaf7ecf..7a2fdc097c8cb 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2717,8 +2717,6 @@ void register_console(struct console *newcon)
 		 * for us.
 		 */
 		logbuf_lock_irqsave(flags);
-		console_seq = syslog_seq;
-		console_idx = syslog_idx;
 		/*
 		 * We're about to replay the log buffer.  Only do this to the
 		 * just-registered console to avoid excessive message spam to
@@ -2730,6 +2728,8 @@ void register_console(struct console *newcon)
 		 */
 		exclusive_console = newcon;
 		exclusive_console_stop_seq = console_seq;
+		console_seq = syslog_seq;
+		console_idx = syslog_idx;
 		logbuf_unlock_irqrestore(flags);
 	}
 	console_unlock();
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 009/195] iwlwifi: mvm: fix NVM check for 3168 devices
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (7 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 008/195] printk: fix exclusive_console replaying Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 010/195] sparc32: fix struct ipc64_perm type definition Greg Kroah-Hartman
                   ` (189 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Stefan Sperling, Luca Coelho, Sasha Levin

From: Luca Coelho <luciano.coelho@intel.com>

[ Upstream commit b3f20e098293892388d6a0491d6bbb2efb46fbff ]

We had a check on !NVM_EXT and then a check for NVM_SDP in the else
block of this if.  The else block, obviously, could only be reached if
using NVM_EXT, so it would never be NVM_SDP.

Fix that by checking whether the nvm_type is IWL_NVM instead of
checking for !IWL_NVM_EXT to solve this issue.

Reported-by: Stefan Sperling <stsp@stsp.name>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/nvm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/nvm.c b/drivers/net/wireless/intel/iwlwifi/mvm/nvm.c
index f2579c94ffdbc..3270faafe0bc3 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/nvm.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/nvm.c
@@ -286,7 +286,7 @@ iwl_parse_nvm_sections(struct iwl_mvm *mvm)
 	int regulatory_type;
 
 	/* Checking for required sections */
-	if (mvm->trans->cfg->nvm_type != IWL_NVM_EXT) {
+	if (mvm->trans->cfg->nvm_type == IWL_NVM) {
 		if (!mvm->nvm_sections[NVM_SECTION_TYPE_SW].data ||
 		    !mvm->nvm_sections[mvm->cfg->nvm_hw_section_num].data) {
 			IWL_ERR(mvm, "Can't parse empty OTP/NVM sections\n");
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 010/195] sparc32: fix struct ipc64_perm type definition
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (8 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 009/195] iwlwifi: mvm: fix NVM check for 3168 devices Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 011/195] cls_rsvp: fix rsvp_policy Greg Kroah-Hartman
                   ` (188 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Sam Ravnborg, Dmitry V . Levin,
	Rich Felker, libc-alpha, Arnd Bergmann, David S. Miller,
	Sasha Levin

From: Arnd Bergmann <arnd@arndb.de>

[ Upstream commit 34ca70ef7d3a9fa7e89151597db5e37ae1d429b4 ]

As discussed in the strace issue tracker, it appears that the sparc32
sysvipc support has been broken for the past 11 years. It was however
working in compat mode, which is how it must have escaped most of the
regular testing.

The problem is that a cleanup patch inadvertently changed the uid/gid
fields in struct ipc64_perm from 32-bit types to 16-bit types in uapi
headers.

Both glibc and uclibc-ng still use the original types, so they should
work fine with compat mode, but not natively.  Change the definitions
to use __kernel_uid32_t and __kernel_gid32_t again.

Fixes: 83c86984bff2 ("sparc: unify ipcbuf.h")
Link: https://github.com/strace/strace/issues/116
Cc: <stable@vger.kernel.org> # v2.6.29
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: "Dmitry V . Levin" <ldv@altlinux.org>
Cc: Rich Felker <dalias@libc.org>
Cc: libc-alpha@sourceware.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/sparc/include/uapi/asm/ipcbuf.h |   22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

--- a/arch/sparc/include/uapi/asm/ipcbuf.h
+++ b/arch/sparc/include/uapi/asm/ipcbuf.h
@@ -15,19 +15,19 @@
 
 struct ipc64_perm
 {
-	__kernel_key_t	key;
-	__kernel_uid_t	uid;
-	__kernel_gid_t	gid;
-	__kernel_uid_t	cuid;
-	__kernel_gid_t	cgid;
+	__kernel_key_t		key;
+	__kernel_uid32_t	uid;
+	__kernel_gid32_t	gid;
+	__kernel_uid32_t	cuid;
+	__kernel_gid32_t	cgid;
 #ifndef __arch64__
-	unsigned short	__pad0;
+	unsigned short		__pad0;
 #endif
-	__kernel_mode_t	mode;
-	unsigned short	__pad1;
-	unsigned short	seq;
-	unsigned long long __unused1;
-	unsigned long long __unused2;
+	__kernel_mode_t		mode;
+	unsigned short		__pad1;
+	unsigned short		seq;
+	unsigned long long	__unused1;
+	unsigned long long	__unused2;
 };
 
 #endif /* __SPARC_IPCBUF_H */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 011/195] cls_rsvp: fix rsvp_policy
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (9 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 010/195] sparc32: fix struct ipc64_perm type definition Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 012/195] gtp: use __GFP_NOWARN to avoid memalloc warning Greg Kroah-Hartman
                   ` (187 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet, syzbot, Cong Wang,
	Jakub Kicinski

From: Eric Dumazet <edumazet@google.com>

[ Upstream commit cb3c0e6bdf64d0d124e94ce43cbe4ccbb9b37f51 ]

NLA_BINARY can be confusing, since .len value represents
the max size of the blob.

cls_rsvp really wants user space to provide long enough data
for TCA_RSVP_DST and TCA_RSVP_SRC attributes.

BUG: KMSAN: uninit-value in rsvp_get net/sched/cls_rsvp.h:258 [inline]
BUG: KMSAN: uninit-value in gen_handle net/sched/cls_rsvp.h:402 [inline]
BUG: KMSAN: uninit-value in rsvp_change+0x1ae9/0x4220 net/sched/cls_rsvp.h:572
CPU: 1 PID: 13228 Comm: syz-executor.1 Not tainted 5.5.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 rsvp_get net/sched/cls_rsvp.h:258 [inline]
 gen_handle net/sched/cls_rsvp.h:402 [inline]
 rsvp_change+0x1ae9/0x4220 net/sched/cls_rsvp.h:572
 tc_new_tfilter+0x31fe/0x5010 net/sched/cls_api.c:2104
 rtnetlink_rcv_msg+0xcb7/0x1570 net/core/rtnetlink.c:5415
 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5442
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x1248/0x14d0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg net/socket.c:659 [inline]
 ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2330
 ___sys_sendmsg net/socket.c:2384 [inline]
 __sys_sendmsg+0x451/0x5f0 net/socket.c:2417
 __do_sys_sendmsg net/socket.c:2426 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2424
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2424
 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45b349
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f269d43dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f269d43e6d4 RCX: 000000000045b349
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009c2 R14: 00000000004cb338 R15: 000000000075bfd4

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127
 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:82
 slab_alloc_node mm/slub.c:2774 [inline]
 __kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4382
 __kmalloc_reserve net/core/skbuff.c:141 [inline]
 __alloc_skb+0x2fd/0xac0 net/core/skbuff.c:209
 alloc_skb include/linux/skbuff.h:1049 [inline]
 netlink_alloc_large_skb net/netlink/af_netlink.c:1174 [inline]
 netlink_sendmsg+0x7d3/0x14d0 net/netlink/af_netlink.c:1892
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg net/socket.c:659 [inline]
 ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2330
 ___sys_sendmsg net/socket.c:2384 [inline]
 __sys_sendmsg+0x451/0x5f0 net/socket.c:2417
 __do_sys_sendmsg net/socket.c:2426 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2424
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2424
 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: 6fa8c0144b77 ("[NET_SCHED]: Use nla_policy for attribute validation in classifiers")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/cls_rsvp.h |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/net/sched/cls_rsvp.h
+++ b/net/sched/cls_rsvp.h
@@ -466,10 +466,8 @@ static u32 gen_tunnel(struct rsvp_head *
 
 static const struct nla_policy rsvp_policy[TCA_RSVP_MAX + 1] = {
 	[TCA_RSVP_CLASSID]	= { .type = NLA_U32 },
-	[TCA_RSVP_DST]		= { .type = NLA_BINARY,
-				    .len = RSVP_DST_LEN * sizeof(u32) },
-	[TCA_RSVP_SRC]		= { .type = NLA_BINARY,
-				    .len = RSVP_DST_LEN * sizeof(u32) },
+	[TCA_RSVP_DST]		= { .len = RSVP_DST_LEN * sizeof(u32) },
+	[TCA_RSVP_SRC]		= { .len = RSVP_DST_LEN * sizeof(u32) },
 	[TCA_RSVP_PINFO]	= { .len = sizeof(struct tc_rsvp_pinfo) },
 };
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 012/195] gtp: use __GFP_NOWARN to avoid memalloc warning
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (10 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 011/195] cls_rsvp: fix rsvp_policy Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 013/195] l2tp: Allow duplicate session creation with UDP Greg Kroah-Hartman
                   ` (186 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Taehee Yoo, David S. Miller

From: Taehee Yoo <ap420073@gmail.com>

[ Upstream commit bd5cd35b782abf5437fbd01dfaee12437d20e832 ]

gtp hashtable size is received by user-space.
So, this hashtable size could be too large. If so, kmalloc will internally
print a warning message.
This warning message is actually not necessary for the gtp module.
So, this patch adds __GFP_NOWARN to avoid this message.

Splat looks like:
[ 2171.200049][ T1860] WARNING: CPU: 1 PID: 1860 at mm/page_alloc.c:4713 __alloc_pages_nodemask+0x2f3/0x740
[ 2171.238885][ T1860] Modules linked in: gtp veth openvswitch nsh nf_conncount nf_nat nf_conntrack nf_defrag_ipv]
[ 2171.262680][ T1860] CPU: 1 PID: 1860 Comm: gtp-link Not tainted 5.5.0+ #321
[ 2171.263567][ T1860] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 2171.264681][ T1860] RIP: 0010:__alloc_pages_nodemask+0x2f3/0x740
[ 2171.265332][ T1860] Code: 64 fe ff ff 65 48 8b 04 25 c0 0f 02 00 48 05 f0 12 00 00 41 be 01 00 00 00 49 89 47 0
[ 2171.267301][ T1860] RSP: 0018:ffff8880b51af1f0 EFLAGS: 00010246
[ 2171.268320][ T1860] RAX: ffffed1016a35e43 RBX: 0000000000000000 RCX: 0000000000000000
[ 2171.269517][ T1860] RDX: 0000000000000000 RSI: 000000000000000b RDI: 0000000000000000
[ 2171.270305][ T1860] RBP: 0000000000040cc0 R08: ffffed1018893109 R09: dffffc0000000000
[ 2171.275973][ T1860] R10: 0000000000000001 R11: ffffed1018893108 R12: 1ffff11016a35e43
[ 2171.291039][ T1860] R13: 000000000000000b R14: 000000000000000b R15: 00000000000f4240
[ 2171.292328][ T1860] FS:  00007f53cbc83740(0000) GS:ffff8880da000000(0000) knlGS:0000000000000000
[ 2171.293409][ T1860] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2171.294586][ T1860] CR2: 000055f540014508 CR3: 00000000b49f2004 CR4: 00000000000606e0
[ 2171.295424][ T1860] Call Trace:
[ 2171.295756][ T1860]  ? mark_held_locks+0xa5/0xe0
[ 2171.296659][ T1860]  ? __alloc_pages_slowpath+0x21b0/0x21b0
[ 2171.298283][ T1860]  ? gtp_encap_enable_socket+0x13e/0x400 [gtp]
[ 2171.298962][ T1860]  ? alloc_pages_current+0xc1/0x1a0
[ 2171.299475][ T1860]  kmalloc_order+0x22/0x80
[ 2171.299936][ T1860]  kmalloc_order_trace+0x1d/0x140
[ 2171.300437][ T1860]  __kmalloc+0x302/0x3a0
[ 2171.300896][ T1860]  gtp_newlink+0x293/0xba0 [gtp]
[ ... ]

Fixes: 459aa660eb1d ("gtp: add initial driver for datapath of GPRS Tunneling Protocol (GTP-U)")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/gtp.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -772,12 +772,12 @@ static int gtp_hashtable_new(struct gtp_
 	int i;
 
 	gtp->addr_hash = kmalloc_array(hsize, sizeof(struct hlist_head),
-				       GFP_KERNEL);
+				       GFP_KERNEL | __GFP_NOWARN);
 	if (gtp->addr_hash == NULL)
 		return -ENOMEM;
 
 	gtp->tid_hash = kmalloc_array(hsize, sizeof(struct hlist_head),
-				      GFP_KERNEL);
+				      GFP_KERNEL | __GFP_NOWARN);
 	if (gtp->tid_hash == NULL)
 		goto err1;
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 013/195] l2tp: Allow duplicate session creation with UDP
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (11 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 012/195] gtp: use __GFP_NOWARN to avoid memalloc warning Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 014/195] net: hsr: fix possible NULL deref in hsr_handle_frame() Greg Kroah-Hartman
                   ` (185 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Ridge Kennedy, James Chapman,
	David S. Miller

From: Ridge Kennedy <ridge.kennedy@alliedtelesis.co.nz>

[ Upstream commit 0d0d9a388a858e271bb70e71e99e7fe2a6fd6f64 ]

In the past it was possible to create multiple L2TPv3 sessions with the
same session id as long as the sessions belonged to different tunnels.
The resulting sessions had issues when used with IP encapsulated tunnels,
but worked fine with UDP encapsulated ones. Some applications began to
rely on this behaviour to avoid having to negotiate unique session ids.

Some time ago a change was made to require session ids to be unique across
all tunnels, breaking the applications making use of this "feature".

This change relaxes the duplicate session id check to allow duplicates
if both of the colliding sessions belong to UDP encapsulated tunnels.

Fixes: dbdbc73b4478 ("l2tp: fix duplicate session creation")
Signed-off-by: Ridge Kennedy <ridge.kennedy@alliedtelesis.co.nz>
Acked-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/l2tp/l2tp_core.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -325,8 +325,13 @@ int l2tp_session_register(struct l2tp_se
 
 		spin_lock_bh(&pn->l2tp_session_hlist_lock);
 
+		/* IP encap expects session IDs to be globally unique, while
+		 * UDP encap doesn't.
+		 */
 		hlist_for_each_entry(session_walk, g_head, global_hlist)
-			if (session_walk->session_id == session->session_id) {
+			if (session_walk->session_id == session->session_id &&
+			    (session_walk->tunnel->encap == L2TP_ENCAPTYPE_IP ||
+			     tunnel->encap == L2TP_ENCAPTYPE_IP)) {
 				err = -EEXIST;
 				goto err_tlock_pnlock;
 			}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 014/195] net: hsr: fix possible NULL deref in hsr_handle_frame()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (12 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 013/195] l2tp: Allow duplicate session creation with UDP Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 015/195] net_sched: fix an OOB access in cls_tcindex Greg Kroah-Hartman
                   ` (184 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet, syzbot, David S. Miller

From: Eric Dumazet <edumazet@google.com>

[ Upstream commit 2b5b8251bc9fe2f9118411f037862ee17cf81e97 ]

hsr_port_get_rcu() can return NULL, so we need to be careful.

general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 10249 Comm: syz-executor.5 Not tainted 5.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:hsr_addr_is_self+0x86/0x330 net/hsr/hsr_framereg.c:44
Code: 04 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 6b ff 94 f9 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 75 02 00 00 48 8b 43 30 49 39 c6 49 89 47 c0 0f
RSP: 0018:ffffc90000da8a90 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff87e0cc33
RDX: 0000000000000006 RSI: ffffffff87e035d5 RDI: 0000000000000000
RBP: ffffc90000da8b20 R08: ffff88808e7de040 R09: ffffed1015d2707c
R10: ffffed1015d2707b R11: ffff8880ae9383db R12: ffff8880a689bc5e
R13: 1ffff920001b5153 R14: 0000000000000030 R15: ffffc90000da8af8
FS:  00007fd7a42be700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32338000 CR3: 00000000a928c000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 hsr_handle_frame+0x1c5/0x630 net/hsr/hsr_slave.c:31
 __netif_receive_skb_core+0xfbc/0x30b0 net/core/dev.c:5099
 __netif_receive_skb_one_core+0xa8/0x1a0 net/core/dev.c:5196
 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5312
 process_backlog+0x206/0x750 net/core/dev.c:6144
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x508/0x1120 net/core/dev.c:6650
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1082
 </IRQ>

Fixes: c5a759117210 ("net/hsr: Use list_head (and rcu) instead of array for slave devices.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/hsr/hsr_slave.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/hsr/hsr_slave.c
+++ b/net/hsr/hsr_slave.c
@@ -32,6 +32,8 @@ static rx_handler_result_t hsr_handle_fr
 
 	rcu_read_lock(); /* hsr->node_db, hsr->ports */
 	port = hsr_port_get_rcu(skb->dev);
+	if (!port)
+		goto finish_pass;
 
 	if (hsr_addr_is_self(port->hsr, eth_hdr(skb)->h_source)) {
 		/* Directly kill frames sent by ourselves */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 015/195] net_sched: fix an OOB access in cls_tcindex
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (13 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 014/195] net: hsr: fix possible NULL deref in hsr_handle_frame() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 016/195] net: stmmac: Delete txtimer in suspend() Greg Kroah-Hartman
                   ` (183 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet, John Fastabend,
	Jamal Hadi Salim, Jiri Pirko, Jakub Kicinski, Cong Wang,
	David S. Miller, syzbot+35d4dea36c387813ed31

From: Cong Wang <xiyou.wangcong@gmail.com>

[ Upstream commit 599be01ee567b61f4471ee8078870847d0a11e8e ]

As Eric noticed, tcindex_alloc_perfect_hash() uses cp->hash
to compute the size of memory allocation, but cp->hash is
set again after the allocation, this caused an out-of-bound
access.

So we have to move all cp->hash initialization and computation
before the memory allocation. Move cp->mask and cp->shift together
as cp->hash may need them for computation too.

Reported-and-tested-by: syzbot+35d4dea36c387813ed31@syzkaller.appspotmail.com
Fixes: 331b72922c5f ("net: sched: RCU cls_tcindex")
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/cls_tcindex.c |   40 ++++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

--- a/net/sched/cls_tcindex.c
+++ b/net/sched/cls_tcindex.c
@@ -333,12 +333,31 @@ tcindex_set_parms(struct net *net, struc
 	cp->fall_through = p->fall_through;
 	cp->tp = tp;
 
+	if (tb[TCA_TCINDEX_HASH])
+		cp->hash = nla_get_u32(tb[TCA_TCINDEX_HASH]);
+
+	if (tb[TCA_TCINDEX_MASK])
+		cp->mask = nla_get_u16(tb[TCA_TCINDEX_MASK]);
+
+	if (tb[TCA_TCINDEX_SHIFT])
+		cp->shift = nla_get_u32(tb[TCA_TCINDEX_SHIFT]);
+
+	if (!cp->hash) {
+		/* Hash not specified, use perfect hash if the upper limit
+		 * of the hashing index is below the threshold.
+		 */
+		if ((cp->mask >> cp->shift) < PERFECT_HASH_THRESHOLD)
+			cp->hash = (cp->mask >> cp->shift) + 1;
+		else
+			cp->hash = DEFAULT_HASH_SIZE;
+	}
+
 	if (p->perfect) {
 		int i;
 
 		if (tcindex_alloc_perfect_hash(net, cp) < 0)
 			goto errout;
-		for (i = 0; i < cp->hash; i++)
+		for (i = 0; i < min(cp->hash, p->hash); i++)
 			cp->perfect[i].res = p->perfect[i].res;
 		balloc = 1;
 	}
@@ -350,15 +369,6 @@ tcindex_set_parms(struct net *net, struc
 	if (old_r)
 		cr = r->res;
 
-	if (tb[TCA_TCINDEX_HASH])
-		cp->hash = nla_get_u32(tb[TCA_TCINDEX_HASH]);
-
-	if (tb[TCA_TCINDEX_MASK])
-		cp->mask = nla_get_u16(tb[TCA_TCINDEX_MASK]);
-
-	if (tb[TCA_TCINDEX_SHIFT])
-		cp->shift = nla_get_u32(tb[TCA_TCINDEX_SHIFT]);
-
 	err = -EBUSY;
 
 	/* Hash already allocated, make sure that we still meet the
@@ -376,16 +386,6 @@ tcindex_set_parms(struct net *net, struc
 	if (tb[TCA_TCINDEX_FALL_THROUGH])
 		cp->fall_through = nla_get_u32(tb[TCA_TCINDEX_FALL_THROUGH]);
 
-	if (!cp->hash) {
-		/* Hash not specified, use perfect hash if the upper limit
-		 * of the hashing index is below the threshold.
-		 */
-		if ((cp->mask >> cp->shift) < PERFECT_HASH_THRESHOLD)
-			cp->hash = (cp->mask >> cp->shift) + 1;
-		else
-			cp->hash = DEFAULT_HASH_SIZE;
-	}
-
 	if (!cp->perfect && !cp->h)
 		cp->alloc_hash = cp->hash;
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 016/195] net: stmmac: Delete txtimer in suspend()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (14 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 015/195] net_sched: fix an OOB access in cls_tcindex Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 017/195] bnxt_en: Fix TC queue mapping Greg Kroah-Hartman
                   ` (182 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Nicolin Chen, Jakub Kicinski

From: Nicolin Chen <nicoleotsuka@gmail.com>

[ Upstream commit 14b41a2959fbaa50932699d32ceefd6643abacc6 ]

When running v5.5 with a rootfs on NFS, memory abort may happen in
the system resume stage:
 Unable to handle kernel paging request at virtual address dead00000000012a
 [dead00000000012a] address between user and kernel address ranges
 pc : run_timer_softirq+0x334/0x3d8
 lr : run_timer_softirq+0x244/0x3d8
 x1 : ffff800011cafe80 x0 : dead000000000122
 Call trace:
  run_timer_softirq+0x334/0x3d8
  efi_header_end+0x114/0x234
  irq_exit+0xd0/0xd8
  __handle_domain_irq+0x60/0xb0
  gic_handle_irq+0x58/0xa8
  el1_irq+0xb8/0x180
  arch_cpu_idle+0x10/0x18
  do_idle+0x1d8/0x2b0
  cpu_startup_entry+0x24/0x40
  secondary_start_kernel+0x1b4/0x208
 Code: f9000693 a9400660 f9000020 b4000040 (f9000401)
 ---[ end trace bb83ceeb4c482071 ]---
 Kernel panic - not syncing: Fatal exception in interrupt
 SMP: stopping secondary CPUs
 SMP: failed to stop secondary CPUs 2-3
 Kernel Offset: disabled
 CPU features: 0x00002,2300aa30
 Memory Limit: none
 ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---

It's found that stmmac_xmit() and stmmac_resume() sometimes might
run concurrently, possibly resulting in a race condition between
mod_timer() and setup_timer(), being called by stmmac_xmit() and
stmmac_resume() respectively.

Since the resume() runs setup_timer() every time, it'd be safer to
have del_timer_sync() in the suspend() as the counterpart.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4513,6 +4513,7 @@ int stmmac_suspend(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct stmmac_priv *priv = netdev_priv(ndev);
+	u32 chan;
 
 	if (!ndev || !netif_running(ndev))
 		return 0;
@@ -4527,6 +4528,9 @@ int stmmac_suspend(struct device *dev)
 
 	stmmac_disable_all_queues(priv);
 
+	for (chan = 0; chan < priv->plat->tx_queues_to_use; chan++)
+		del_timer_sync(&priv->tx_queue[chan].txtimer);
+
 	/* Stop TX/RX DMA */
 	stmmac_stop_all_dma(priv);
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 017/195] bnxt_en: Fix TC queue mapping.
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (15 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 016/195] net: stmmac: Delete txtimer in suspend() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 018/195] tcp: clear tp->total_retrans in tcp_disconnect() Greg Kroah-Hartman
                   ` (181 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Michael Chan, Jakub Kicinski

From: Michael Chan <michael.chan@broadcom.com>

[ Upstream commit 18e4960c18f484ac288f41b43d0e6c4c88e6ea78 ]

The driver currently only calls netdev_set_tc_queue when the number of
TCs is greater than 1.  Instead, the comparison should be greater than
or equal to 1.  Even with 1 TC, we need to set the queue mapping.

This bug can cause warnings when the number of TCs is changed back to 1.

Fixes: 7809592d3e2e ("bnxt_en: Enable MSIX early in bnxt_init_one().")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5861,7 +5861,7 @@ static void bnxt_setup_msix(struct bnxt
 	int tcs, i;
 
 	tcs = netdev_get_num_tc(dev);
-	if (tcs > 1) {
+	if (tcs) {
 		int i, off, count;
 
 		for (i = 0; i < tcs; i++) {



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 018/195] tcp: clear tp->total_retrans in tcp_disconnect()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (16 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 017/195] bnxt_en: Fix TC queue mapping Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 019/195] tcp: clear tp->delivered " Greg Kroah-Hartman
                   ` (180 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet, SeongJae Park, Jakub Kicinski

From: Eric Dumazet <edumazet@google.com>

[ Upstream commit c13c48c00a6bc1febc73902505bdec0967bd7095 ]

total_retrans needs to be cleared in tcp_disconnect().

tcp_disconnect() is rarely used, but it is worth fixing it.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: SeongJae Park <sjpark@amazon.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/tcp.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2592,6 +2592,7 @@ int tcp_disconnect(struct sock *sk, int
 	tcp_set_ca_state(sk, TCP_CA_Open);
 	tp->is_sack_reneg = 0;
 	tcp_clear_retrans(tp);
+	tp->total_retrans = 0;
 	inet_csk_delack_init(sk);
 	/* Initialize rcv_mss to TCP_MIN_MSS to avoid division by 0
 	 * issue in __tcp_select_window()



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 019/195] tcp: clear tp->delivered in tcp_disconnect()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (17 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 018/195] tcp: clear tp->total_retrans in tcp_disconnect() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` " Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 020/195] tcp: clear tp->data_segs{in|out} " Greg Kroah-Hartman
                   ` (179 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet, Yuchung Cheng,
	Neal Cardwell, Soheil Hassas Yeganeh, Jakub Kicinski

From: Eric Dumazet <edumazet@google.com>

[ Upstream commit 2fbdd56251b5c62f96589f39eded277260de7267 ]

tp->delivered needs to be cleared in tcp_disconnect().

tcp_disconnect() is rarely used, but it is worth fixing it.

Fixes: ddf1af6fa00e ("tcp: new delivery accounting")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/tcp.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2588,6 +2588,7 @@ int tcp_disconnect(struct sock *sk, int
 	tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
 	tp->snd_cwnd_cnt = 0;
 	tp->window_clamp = 0;
+	tp->delivered = 0;
 	tp->delivered_ce = 0;
 	tcp_set_ca_state(sk, TCP_CA_Open);
 	tp->is_sack_reneg = 0;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 020/195] tcp: clear tp->data_segs{in|out} in tcp_disconnect()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (18 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 019/195] tcp: clear tp->delivered " Greg Kroah-Hartman
@ 2020-02-10 12:31 ` " Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 021/195] tcp: clear tp->segs_{in|out} " Greg Kroah-Hartman
                   ` (178 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet, Martin KaFai Lau,
	Yuchung Cheng, Neal Cardwell, Jakub Kicinski

From: Eric Dumazet <edumazet@google.com>

[ Upstream commit db7ffee6f3eb3683cdcaeddecc0a630a14546fe3 ]

tp->data_segs_in and tp->data_segs_out need to be cleared
in tcp_disconnect().

tcp_disconnect() is rarely used, but it is worth fixing it.

Fixes: a44d6eacdaf5 ("tcp: Add RFC4898 tcpEStatsPerfDataSegsOut/In")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/tcp.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2609,6 +2609,8 @@ int tcp_disconnect(struct sock *sk, int
 	tp->bytes_acked = 0;
 	tp->bytes_received = 0;
 	tp->bytes_retrans = 0;
+	tp->data_segs_in = 0;
+	tp->data_segs_out = 0;
 	tp->dsack_dups = 0;
 	tp->reord_seen = 0;
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 021/195] tcp: clear tp->segs_{in|out} in tcp_disconnect()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (19 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 020/195] tcp: clear tp->data_segs{in|out} " Greg Kroah-Hartman
@ 2020-02-10 12:31 ` " Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 022/195] rxrpc: Fix use-after-free in rxrpc_put_local() Greg Kroah-Hartman
                   ` (177 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet,
	Marcelo Ricardo Leitner, Yuchung Cheng, Neal Cardwell,
	Jakub Kicinski

From: Eric Dumazet <edumazet@google.com>

[ Upstream commit 784f8344de750a41344f4bbbebb8507a730fc99c ]

tp->segs_in and tp->segs_out need to be cleared in tcp_disconnect().

tcp_disconnect() is rarely used, but it is worth fixing it.

Fixes: 2efd055c53c0 ("tcp: add tcpi_segs_in and tcpi_segs_out to tcp_info")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Marcelo Ricardo Leitner <mleitner@redhat.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/tcp.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2605,6 +2605,8 @@ int tcp_disconnect(struct sock *sk, int
 	sk->sk_rx_dst = NULL;
 	tcp_saved_syn_free(tp);
 	tp->compressed_ack = 0;
+	tp->segs_in = 0;
+	tp->segs_out = 0;
 	tp->bytes_sent = 0;
 	tp->bytes_acked = 0;
 	tp->bytes_received = 0;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 022/195] rxrpc: Fix use-after-free in rxrpc_put_local()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (20 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 021/195] tcp: clear tp->segs_{in|out} " Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 023/195] rxrpc: Fix insufficient receive notification generation Greg Kroah-Hartman
                   ` (176 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, David Howells

From: David Howells <dhowells@redhat.com>

[ Upstream commit fac20b9e738523fc884ee3ea5be360a321cd8bad ]

Fix rxrpc_put_local() to not access local->debug_id after calling
atomic_dec_return() as, unless that returned n==0, we no longer have the
right to access the object.

Fixes: 06d9532fa6b3 ("rxrpc: Fix read-after-free in rxrpc_queue_local()")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/rxrpc/local_object.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -368,11 +368,14 @@ void rxrpc_queue_local(struct rxrpc_loca
 void rxrpc_put_local(struct rxrpc_local *local)
 {
 	const void *here = __builtin_return_address(0);
+	unsigned int debug_id;
 	int n;
 
 	if (local) {
+		debug_id = local->debug_id;
+
 		n = atomic_dec_return(&local->usage);
-		trace_rxrpc_local(local->debug_id, rxrpc_local_put, n, here);
+		trace_rxrpc_local(debug_id, rxrpc_local_put, n, here);
 
 		if (n == 0)
 			call_rcu(&local->rcu, rxrpc_local_rcu);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 023/195] rxrpc: Fix insufficient receive notification generation
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (21 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 022/195] rxrpc: Fix use-after-free in rxrpc_put_local() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 024/195] rxrpc: Fix missing active use pinning of rxrpc_local object Greg Kroah-Hartman
                   ` (175 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, David Howells

From: David Howells <dhowells@redhat.com>

[ Upstream commit f71dbf2fb28489a79bde0dca1c8adfb9cdb20a6b ]

In rxrpc_input_data(), rxrpc_notify_socket() is called if the base sequence
number of the packet is immediately following the hard-ack point at the end
of the function.  However, this isn't sufficient, since the recvmsg side
may have been advancing the window and then overrun the position in which
we're adding - at which point rx_hard_ack >= seq0 and no notification is
generated.

Fix this by always generating a notification at the end of the input
function.

Without this, a long call may stall, possibly indefinitely.

Fixes: 248f219cb8bc ("rxrpc: Rewrite the data and ack handling code")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/rxrpc/input.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -612,10 +612,8 @@ ack:
 				  false, true,
 				  rxrpc_propose_ack_input_data);
 
-	if (sp->hdr.seq == READ_ONCE(call->rx_hard_ack) + 1) {
-		trace_rxrpc_notify_socket(call->debug_id, serial);
-		rxrpc_notify_socket(call);
-	}
+	trace_rxrpc_notify_socket(call->debug_id, serial);
+	rxrpc_notify_socket(call);
 
 unlock:
 	spin_unlock(&call->input_lock);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 024/195] rxrpc: Fix missing active use pinning of rxrpc_local object
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (22 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 023/195] rxrpc: Fix insufficient receive notification generation Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 025/195] rxrpc: Fix NULL pointer deref due to call->conn being cleared on disconnect Greg Kroah-Hartman
                   ` (174 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, David Howells

From: David Howells <dhowells@redhat.com>

[ Upstream commit 04d36d748fac349b068ef621611f454010054c58 ]

The introduction of a split between the reference count on rxrpc_local
objects and the usage count didn't quite go far enough.  A number of kernel
work items need to make use of the socket to perform transmission.  These
also need to get an active count on the local object to prevent the socket
from being closed.

Fix this by getting the active count in those places.

Also split out the raw active count get/put functions as these places tend
to hold refs on the rxrpc_local object already, so getting and putting an
extra object ref is just a waste of time.

The problem can lead to symptoms like:

    BUG: kernel NULL pointer dereference, address: 0000000000000018
    ..
    CPU: 2 PID: 818 Comm: kworker/u9:0 Not tainted 5.5.0-fscache+ #51
    ...
    RIP: 0010:selinux_socket_sendmsg+0x5/0x13
    ...
    Call Trace:
     security_socket_sendmsg+0x2c/0x3e
     sock_sendmsg+0x1a/0x46
     rxrpc_send_keepalive+0x131/0x1ae
     rxrpc_peer_keepalive_worker+0x219/0x34b
     process_one_work+0x18e/0x271
     worker_thread+0x1a3/0x247
     kthread+0xe6/0xeb
     ret_from_fork+0x1f/0x30

Fixes: 730c5fd42c1e ("rxrpc: Fix local endpoint refcounting")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/rxrpc/af_rxrpc.c     |    2 ++
 net/rxrpc/ar-internal.h  |   10 ++++++++++
 net/rxrpc/conn_event.c   |   31 +++++++++++++++++++++----------
 net/rxrpc/local_object.c |   18 +++++++-----------
 net/rxrpc/peer_event.c   |   40 ++++++++++++++++++++++------------------
 5 files changed, 62 insertions(+), 39 deletions(-)

--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -196,6 +196,7 @@ static int rxrpc_bind(struct socket *soc
 service_in_use:
 	write_unlock(&local->services_lock);
 	rxrpc_unuse_local(local);
+	rxrpc_put_local(local);
 	ret = -EADDRINUSE;
 error_unlock:
 	release_sock(&rx->sk);
@@ -906,6 +907,7 @@ static int rxrpc_release_sock(struct soc
 	rxrpc_purge_queue(&sk->sk_receive_queue);
 
 	rxrpc_unuse_local(rx->local);
+	rxrpc_put_local(rx->local);
 	rx->local = NULL;
 	key_put(rx->key);
 	rx->key = NULL;
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -1006,6 +1006,16 @@ void rxrpc_unuse_local(struct rxrpc_loca
 void rxrpc_queue_local(struct rxrpc_local *);
 void rxrpc_destroy_all_locals(struct rxrpc_net *);
 
+static inline bool __rxrpc_unuse_local(struct rxrpc_local *local)
+{
+	return atomic_dec_return(&local->active_users) == 0;
+}
+
+static inline bool __rxrpc_use_local(struct rxrpc_local *local)
+{
+	return atomic_fetch_add_unless(&local->active_users, 1, 0) != 0;
+}
+
 /*
  * misc.c
  */
--- a/net/rxrpc/conn_event.c
+++ b/net/rxrpc/conn_event.c
@@ -453,16 +453,12 @@ again:
 /*
  * connection-level event processor
  */
-void rxrpc_process_connection(struct work_struct *work)
+static void rxrpc_do_process_connection(struct rxrpc_connection *conn)
 {
-	struct rxrpc_connection *conn =
-		container_of(work, struct rxrpc_connection, processor);
 	struct sk_buff *skb;
 	u32 abort_code = RX_PROTOCOL_ERROR;
 	int ret;
 
-	rxrpc_see_connection(conn);
-
 	if (test_and_clear_bit(RXRPC_CONN_EV_CHALLENGE, &conn->events))
 		rxrpc_secure_connection(conn);
 
@@ -490,18 +486,33 @@ void rxrpc_process_connection(struct wor
 		}
 	}
 
-out:
-	rxrpc_put_connection(conn);
-	_leave("");
 	return;
 
 requeue_and_leave:
 	skb_queue_head(&conn->rx_queue, skb);
-	goto out;
+	return;
 
 protocol_error:
 	if (rxrpc_abort_connection(conn, ret, abort_code) < 0)
 		goto requeue_and_leave;
 	rxrpc_free_skb(skb, rxrpc_skb_rx_freed);
-	goto out;
+	return;
+}
+
+void rxrpc_process_connection(struct work_struct *work)
+{
+	struct rxrpc_connection *conn =
+		container_of(work, struct rxrpc_connection, processor);
+
+	rxrpc_see_connection(conn);
+
+	if (__rxrpc_use_local(conn->params.local)) {
+		rxrpc_do_process_connection(conn);
+		rxrpc_unuse_local(conn->params.local);
+	}
+
+	rxrpc_put_connection(conn);
+	_leave("");
+	return;
 }
+
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -387,14 +387,11 @@ void rxrpc_put_local(struct rxrpc_local
  */
 struct rxrpc_local *rxrpc_use_local(struct rxrpc_local *local)
 {
-	unsigned int au;
-
 	local = rxrpc_get_local_maybe(local);
 	if (!local)
 		return NULL;
 
-	au = atomic_fetch_add_unless(&local->active_users, 1, 0);
-	if (au == 0) {
+	if (!__rxrpc_use_local(local)) {
 		rxrpc_put_local(local);
 		return NULL;
 	}
@@ -408,14 +405,11 @@ struct rxrpc_local *rxrpc_use_local(stru
  */
 void rxrpc_unuse_local(struct rxrpc_local *local)
 {
-	unsigned int au;
-
 	if (local) {
-		au = atomic_dec_return(&local->active_users);
-		if (au == 0)
+		if (__rxrpc_unuse_local(local)) {
+			rxrpc_get_local(local);
 			rxrpc_queue_local(local);
-		else
-			rxrpc_put_local(local);
+		}
 	}
 }
 
@@ -472,7 +466,7 @@ static void rxrpc_local_processor(struct
 
 	do {
 		again = false;
-		if (atomic_read(&local->active_users) == 0) {
+		if (!__rxrpc_use_local(local)) {
 			rxrpc_local_destroyer(local);
 			break;
 		}
@@ -486,6 +480,8 @@ static void rxrpc_local_processor(struct
 			rxrpc_process_local_events(local);
 			again = true;
 		}
+
+		__rxrpc_unuse_local(local);
 	} while (again);
 
 	rxrpc_put_local(local);
--- a/net/rxrpc/peer_event.c
+++ b/net/rxrpc/peer_event.c
@@ -357,27 +357,31 @@ static void rxrpc_peer_keepalive_dispatc
 		if (!rxrpc_get_peer_maybe(peer))
 			continue;
 
-		spin_unlock_bh(&rxnet->peer_hash_lock);
+		if (__rxrpc_use_local(peer->local)) {
+			spin_unlock_bh(&rxnet->peer_hash_lock);
 
-		keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME;
-		slot = keepalive_at - base;
-		_debug("%02x peer %u t=%d {%pISp}",
-		       cursor, peer->debug_id, slot, &peer->srx.transport);
+			keepalive_at = peer->last_tx_at + RXRPC_KEEPALIVE_TIME;
+			slot = keepalive_at - base;
+			_debug("%02x peer %u t=%d {%pISp}",
+			       cursor, peer->debug_id, slot, &peer->srx.transport);
 
-		if (keepalive_at <= base ||
-		    keepalive_at > base + RXRPC_KEEPALIVE_TIME) {
-			rxrpc_send_keepalive(peer);
-			slot = RXRPC_KEEPALIVE_TIME;
-		}
+			if (keepalive_at <= base ||
+			    keepalive_at > base + RXRPC_KEEPALIVE_TIME) {
+				rxrpc_send_keepalive(peer);
+				slot = RXRPC_KEEPALIVE_TIME;
+			}
 
-		/* A transmission to this peer occurred since last we examined
-		 * it so put it into the appropriate future bucket.
-		 */
-		slot += cursor;
-		slot &= mask;
-		spin_lock_bh(&rxnet->peer_hash_lock);
-		list_add_tail(&peer->keepalive_link,
-			      &rxnet->peer_keepalive[slot & mask]);
+			/* A transmission to this peer occurred since last we
+			 * examined it so put it into the appropriate future
+			 * bucket.
+			 */
+			slot += cursor;
+			slot &= mask;
+			spin_lock_bh(&rxnet->peer_hash_lock);
+			list_add_tail(&peer->keepalive_link,
+				      &rxnet->peer_keepalive[slot & mask]);
+			rxrpc_unuse_local(peer->local);
+		}
 		rxrpc_put_peer_locked(peer);
 	}
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 025/195] rxrpc: Fix NULL pointer deref due to call->conn being cleared on disconnect
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (23 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 024/195] rxrpc: Fix missing active use pinning of rxrpc_local object Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 026/195] media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors Greg Kroah-Hartman
                   ` (173 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, David Howells

From: David Howells <dhowells@redhat.com>

[ Upstream commit 5273a191dca65a675dc0bcf3909e59c6933e2831 ]

When a call is disconnected, the connection pointer from the call is
cleared to make sure it isn't used again and to prevent further attempted
transmission for the call.  Unfortunately, there might be a daemon trying
to use it at the same time to transmit a packet.

Fix this by keeping call->conn set, but setting a flag on the call to
indicate disconnection instead.

Remove also the bits in the transmission functions where the conn pointer is
checked and a ref taken under spinlock as this is now redundant.

Fixes: 8d94aa381dab ("rxrpc: Calls shouldn't hold socket refs")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/rxrpc/ar-internal.h |    1 +
 net/rxrpc/call_object.c |    4 ++--
 net/rxrpc/conn_client.c |    3 +--
 net/rxrpc/conn_object.c |    4 ++--
 net/rxrpc/output.c      |   27 +++++++++------------------
 5 files changed, 15 insertions(+), 24 deletions(-)

--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -484,6 +484,7 @@ enum rxrpc_call_flag {
 	RXRPC_CALL_BEGAN_RX_TIMER,	/* We began the expect_rx_by timer */
 	RXRPC_CALL_RX_HEARD,		/* The peer responded at least once to this call */
 	RXRPC_CALL_RX_UNDERRUN,		/* Got data underrun */
+	RXRPC_CALL_DISCONNECTED,	/* The call has been disconnected */
 };
 
 /*
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -520,7 +520,7 @@ void rxrpc_release_call(struct rxrpc_soc
 
 	_debug("RELEASE CALL %p (%d CONN %p)", call, call->debug_id, conn);
 
-	if (conn)
+	if (conn && !test_bit(RXRPC_CALL_DISCONNECTED, &call->flags))
 		rxrpc_disconnect_call(call);
 
 	for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++) {
@@ -654,6 +654,7 @@ static void rxrpc_rcu_destroy_call(struc
 	struct rxrpc_call *call = container_of(rcu, struct rxrpc_call, rcu);
 	struct rxrpc_net *rxnet = call->rxnet;
 
+	rxrpc_put_connection(call->conn);
 	rxrpc_put_peer(call->peer);
 	kfree(call->rxtx_buffer);
 	kfree(call->rxtx_annotations);
@@ -677,7 +678,6 @@ void rxrpc_cleanup_call(struct rxrpc_cal
 
 	ASSERTCMP(call->state, ==, RXRPC_CALL_COMPLETE);
 	ASSERT(test_bit(RXRPC_CALL_RELEASED, &call->flags));
-	ASSERTCMP(call->conn, ==, NULL);
 
 	/* Clean up the Rx/Tx buffer */
 	for (i = 0; i < RXRPC_RXTX_BUFF_SIZE; i++)
--- a/net/rxrpc/conn_client.c
+++ b/net/rxrpc/conn_client.c
@@ -786,6 +786,7 @@ void rxrpc_disconnect_client_call(struct
 	u32 cid;
 
 	spin_lock(&conn->channel_lock);
+	set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
 
 	cid = call->cid;
 	if (cid) {
@@ -793,7 +794,6 @@ void rxrpc_disconnect_client_call(struct
 		chan = &conn->channels[channel];
 	}
 	trace_rxrpc_client(conn, channel, rxrpc_client_chan_disconnect);
-	call->conn = NULL;
 
 	/* Calls that have never actually been assigned a channel can simply be
 	 * discarded.  If the conn didn't get used either, it will follow
@@ -909,7 +909,6 @@ out:
 	spin_unlock(&rxnet->client_conn_cache_lock);
 out_2:
 	spin_unlock(&conn->channel_lock);
-	rxrpc_put_connection(conn);
 	_leave("");
 	return;
 
--- a/net/rxrpc/conn_object.c
+++ b/net/rxrpc/conn_object.c
@@ -174,6 +174,8 @@ void __rxrpc_disconnect_call(struct rxrp
 
 	_enter("%d,%x", conn->debug_id, call->cid);
 
+	set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
+
 	if (rcu_access_pointer(chan->call) == call) {
 		/* Save the result of the call so that we can repeat it if necessary
 		 * through the channel, whilst disposing of the actual call record.
@@ -226,9 +228,7 @@ void rxrpc_disconnect_call(struct rxrpc_
 	__rxrpc_disconnect_call(conn, call);
 	spin_unlock(&conn->channel_lock);
 
-	call->conn = NULL;
 	conn->idle_timestamp = jiffies;
-	rxrpc_put_connection(conn);
 }
 
 /*
--- a/net/rxrpc/output.c
+++ b/net/rxrpc/output.c
@@ -133,7 +133,7 @@ static size_t rxrpc_fill_out_ack(struct
 int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping,
 			  rxrpc_serial_t *_serial)
 {
-	struct rxrpc_connection *conn = NULL;
+	struct rxrpc_connection *conn;
 	struct rxrpc_ack_buffer *pkt;
 	struct msghdr msg;
 	struct kvec iov[2];
@@ -143,18 +143,14 @@ int rxrpc_send_ack_packet(struct rxrpc_c
 	int ret;
 	u8 reason;
 
-	spin_lock_bh(&call->lock);
-	if (call->conn)
-		conn = rxrpc_get_connection_maybe(call->conn);
-	spin_unlock_bh(&call->lock);
-	if (!conn)
+	if (test_bit(RXRPC_CALL_DISCONNECTED, &call->flags))
 		return -ECONNRESET;
 
 	pkt = kzalloc(sizeof(*pkt), GFP_KERNEL);
-	if (!pkt) {
-		rxrpc_put_connection(conn);
+	if (!pkt)
 		return -ENOMEM;
-	}
+
+	conn = call->conn;
 
 	msg.msg_name	= &call->peer->srx.transport;
 	msg.msg_namelen	= call->peer->srx.transport_len;
@@ -249,7 +245,6 @@ int rxrpc_send_ack_packet(struct rxrpc_c
 	}
 
 out:
-	rxrpc_put_connection(conn);
 	kfree(pkt);
 	return ret;
 }
@@ -259,7 +254,7 @@ out:
  */
 int rxrpc_send_abort_packet(struct rxrpc_call *call)
 {
-	struct rxrpc_connection *conn = NULL;
+	struct rxrpc_connection *conn;
 	struct rxrpc_abort_buffer pkt;
 	struct msghdr msg;
 	struct kvec iov[1];
@@ -276,13 +271,11 @@ int rxrpc_send_abort_packet(struct rxrpc
 	    test_bit(RXRPC_CALL_TX_LAST, &call->flags))
 		return 0;
 
-	spin_lock_bh(&call->lock);
-	if (call->conn)
-		conn = rxrpc_get_connection_maybe(call->conn);
-	spin_unlock_bh(&call->lock);
-	if (!conn)
+	if (test_bit(RXRPC_CALL_DISCONNECTED, &call->flags))
 		return -ECONNRESET;
 
+	conn = call->conn;
+
 	msg.msg_name	= &call->peer->srx.transport;
 	msg.msg_namelen	= call->peer->srx.transport_len;
 	msg.msg_control	= NULL;
@@ -317,8 +310,6 @@ int rxrpc_send_abort_packet(struct rxrpc
 		trace_rxrpc_tx_packet(call->debug_id, &pkt.whdr,
 				      rxrpc_tx_point_call_abort);
 	rxrpc_tx_backoff(call, ret);
-
-	rxrpc_put_connection(conn);
 	return ret;
 }
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 026/195] media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (24 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 025/195] rxrpc: Fix NULL pointer deref due to call->conn being cleared on disconnect Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 027/195] mfd: dln2: More sanity checking for endpoints Greg Kroah-Hartman
                   ` (172 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Andrey Konovalov, Will Deacon,
	Laurent Pinchart, Mauro Carvalho Chehab

From: Will Deacon <will@kernel.org>

commit 68035c80e129c4cfec659aac4180354530b26527 upstream.

Way back in 2017, fuzzing the 4.14-rc2 USB stack with syzkaller kicked
up the following WARNING from the UVC chain scanning code:

  | list_add double add: new=ffff880069084010, prev=ffff880069084010,
  | next=ffff880067d22298.
  | ------------[ cut here ]------------
  | WARNING: CPU: 1 PID: 1846 at lib/list_debug.c:31 __list_add_valid+0xbd/0xf0
  | Modules linked in:
  | CPU: 1 PID: 1846 Comm: kworker/1:2 Not tainted
  | 4.14.0-rc2-42613-g1488251d1a98 #238
  | Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
  | Workqueue: usb_hub_wq hub_event
  | task: ffff88006b01ca40 task.stack: ffff880064358000
  | RIP: 0010:__list_add_valid+0xbd/0xf0 lib/list_debug.c:29
  | RSP: 0018:ffff88006435ddd0 EFLAGS: 00010286
  | RAX: 0000000000000058 RBX: ffff880067d22298 RCX: 0000000000000000
  | RDX: 0000000000000058 RSI: ffffffff85a58800 RDI: ffffed000c86bbac
  | RBP: ffff88006435dde8 R08: 1ffff1000c86ba52 R09: 0000000000000000
  | R10: 0000000000000002 R11: 0000000000000000 R12: ffff880069084010
  | R13: ffff880067d22298 R14: ffff880069084010 R15: ffff880067d222a0
  | FS:  0000000000000000(0000) GS:ffff88006c900000(0000) knlGS:0000000000000000
  | CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  | CR2: 0000000020004ff2 CR3: 000000006b447000 CR4: 00000000000006e0
  | Call Trace:
  |  __list_add ./include/linux/list.h:59
  |  list_add_tail+0x8c/0x1b0 ./include/linux/list.h:92
  |  uvc_scan_chain_forward.isra.8+0x373/0x416
  | drivers/media/usb/uvc/uvc_driver.c:1471
  |  uvc_scan_chain drivers/media/usb/uvc/uvc_driver.c:1585
  |  uvc_scan_device drivers/media/usb/uvc/uvc_driver.c:1769
  |  uvc_probe+0x77f2/0x8f00 drivers/media/usb/uvc/uvc_driver.c:2104

Looking into the output from usbmon, the interesting part is the
following data packet:

  ffff880069c63e00 30710169 C Ci:1:002:0 0 143 = 09028f00 01030080
  00090403 00000e01 00000924 03000103 7c003328 010204db

If we drop the lead configuration and interface descriptors, we're left
with an output terminal descriptor describing a generic display:

  /* Output terminal descriptor */
  buf[0]	09
  buf[1]	24
  buf[2]	03	/* UVC_VC_OUTPUT_TERMINAL */
  buf[3]	00	/* ID */
  buf[4]	01	/* type == 0x0301 (UVC_OTT_DISPLAY) */
  buf[5]	03
  buf[6]	7c
  buf[7]	00	/* source ID refers to self! */
  buf[8]	33

The problem with this descriptor is that it is self-referential: the
source ID of 0 matches itself! This causes the 'struct uvc_entity'
representing the display to be added to its chain list twice during
'uvc_scan_chain()': once via 'uvc_scan_chain_entity()' when it is
processed directly from the 'dev->entities' list and then again
immediately afterwards when trying to follow the source ID in
'uvc_scan_chain_forward()'

Add a check before adding an entity to a chain list to ensure that the
entity is not already part of a chain.

Link: https://lore.kernel.org/linux-media/CAAeHK+z+Si69jUR+N-SjN9q4O+o5KFiNManqEa-PjUta7EOb7A@mail.gmail.com/

Cc: <stable@vger.kernel.org>
Fixes: c0efd232929c ("V4L/DVB (8145a): USB Video Class driver")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/usb/uvc/uvc_driver.c |   12 ++++++++++++
 1 file changed, 12 insertions(+)

--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1482,6 +1482,11 @@ static int uvc_scan_chain_forward(struct
 			break;
 		if (forward == prev)
 			continue;
+		if (forward->chain.next || forward->chain.prev) {
+			uvc_trace(UVC_TRACE_DESCR, "Found reference to "
+				"entity %d already in chain.\n", forward->id);
+			return -EINVAL;
+		}
 
 		switch (UVC_ENTITY_TYPE(forward)) {
 		case UVC_VC_EXTENSION_UNIT:
@@ -1563,6 +1568,13 @@ static int uvc_scan_chain_backward(struc
 				return -1;
 			}
 
+			if (term->chain.next || term->chain.prev) {
+				uvc_trace(UVC_TRACE_DESCR, "Found reference to "
+					"entity %d already in chain.\n",
+					term->id);
+				return -EINVAL;
+			}
+
 			if (uvc_trace_param & UVC_TRACE_PROBE)
 				printk(KERN_CONT " %d", term->id);
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 027/195] mfd: dln2: More sanity checking for endpoints
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (25 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 026/195] media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 028/195] ipc/msg.c: consolidate all xxxctl_down() functions Greg Kroah-Hartman
                   ` (171 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Oliver Neukum, Lee Jones,
	syzbot+48a2851be24583b864dc

From: Oliver Neukum <oneukum@suse.com>

commit 2b8bd606b1e60ca28c765f69c1eedd7d2a2e9dca upstream.

It is not enough to check for the number of endpoints.
The types must also be correct.

Reported-and-tested-by: syzbot+48a2851be24583b864dc@syzkaller.appspotmail.com
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mfd/dln2.c |   13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

--- a/drivers/mfd/dln2.c
+++ b/drivers/mfd/dln2.c
@@ -725,6 +725,8 @@ static int dln2_probe(struct usb_interfa
 		      const struct usb_device_id *usb_id)
 {
 	struct usb_host_interface *hostif = interface->cur_altsetting;
+	struct usb_endpoint_descriptor *epin;
+	struct usb_endpoint_descriptor *epout;
 	struct device *dev = &interface->dev;
 	struct dln2_dev *dln2;
 	int ret;
@@ -734,12 +736,19 @@ static int dln2_probe(struct usb_interfa
 	    hostif->desc.bNumEndpoints < 2)
 		return -ENODEV;
 
+	epin = &hostif->endpoint[0].desc;
+	epout = &hostif->endpoint[1].desc;
+	if (!usb_endpoint_is_bulk_out(epout))
+		return -ENODEV;
+	if (!usb_endpoint_is_bulk_in(epin))
+		return -ENODEV;
+
 	dln2 = kzalloc(sizeof(*dln2), GFP_KERNEL);
 	if (!dln2)
 		return -ENOMEM;
 
-	dln2->ep_out = hostif->endpoint[0].desc.bEndpointAddress;
-	dln2->ep_in = hostif->endpoint[1].desc.bEndpointAddress;
+	dln2->ep_out = epout->bEndpointAddress;
+	dln2->ep_in = epin->bEndpointAddress;
 	dln2->usb_dev = usb_get_dev(interface_to_usbdev(interface));
 	dln2->interface = interface;
 	usb_set_intfdata(interface, dln2);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 028/195] ipc/msg.c: consolidate all xxxctl_down() functions
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (26 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 027/195] mfd: dln2: More sanity checking for endpoints Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 029/195] tracing: Fix sched switch start/stop refcount racy updates Greg Kroah-Hartman
                   ` (170 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Lu Shuaibing, Nathan Chancellor,
	Arnd Bergmann, Davidlohr Bueso, Manfred Spraul, NeilBrown,
	Shaohua Li, Jens Axboe, Andrew Morton, Linus Torvalds

From: Lu Shuaibing <shuaibinglu@126.com>

commit 889b331724c82c11e15ba0a60979cf7bded0a26c upstream.

A use of uninitialized memory in msgctl_down() because msqid64 in
ksys_msgctl hasn't been initialized.  The local | msqid64 | is created in
ksys_msgctl() and then passed into msgctl_down().  Along the way msqid64
is never initialized before msgctl_down() checks msqid64->msg_qbytes.

KUMSAN(KernelUninitializedMemorySantizer, a new error detection tool)
reports:

==================================================================
BUG: KUMSAN: use of uninitialized memory in msgctl_down+0x94/0x300
Read of size 8 at addr ffff88806bb97eb8 by task syz-executor707/2022

CPU: 0 PID: 2022 Comm: syz-executor707 Not tainted 5.2.0-rc4+ #63
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
Call Trace:
 dump_stack+0x75/0xae
 __kumsan_report+0x17c/0x3e6
 kumsan_report+0xe/0x20
 msgctl_down+0x94/0x300
 ksys_msgctl.constprop.14+0xef/0x260
 do_syscall_64+0x7e/0x1f0
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4400e9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd869e0598 EFLAGS: 00000246 ORIG_RAX: 0000000000000047
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401970
R13: 0000000000401a00 R14: 0000000000000000 R15: 0000000000000000

The buggy address belongs to the page:
page:ffffea0001aee5c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x100000000000000()
raw: 0100000000000000 0000000000000000 ffffffff01ae0101 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kumsan: bad access detected
==================================================================

Syzkaller reproducer:
msgctl$IPC_RMID(0x0, 0x0)

C reproducer:
// autogenerated by syzkaller (https://github.com/google/syzkaller)

int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  syscall(__NR_msgctl, 0, 0, 0);
  return 0;
}

[natechancellor@gmail.com: adjust indentation in ksys_msgctl]
  Link: https://github.com/ClangBuiltLinux/linux/issues/829
  Link: http://lkml.kernel.org/r/20191218032932.37479-1-natechancellor@gmail.com
Link: http://lkml.kernel.org/r/20190613014044.24234-1-shuaibinglu@126.com
Signed-off-by: Lu Shuaibing <shuaibinglu@126.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: NeilBrown <neilb@suse.com>
From: Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH 4.19 028/195] ipc/msg.c: consolidate all xxxctl_down() functions

Each line here overflows 80 cols by exactly one character.  Delete one tab
per line to fix.

Cc: Shaohua Li <shli@fb.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 ipc/msg.c |   19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -377,7 +377,7 @@ copy_msqid_from_user(struct msqid64_ds *
  * NOTE: no locks must be held, the rwsem is taken inside this function.
  */
 static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
-			struct msqid64_ds *msqid64)
+			struct ipc64_perm *perm, int msg_qbytes)
 {
 	struct kern_ipc_perm *ipcp;
 	struct msg_queue *msq;
@@ -387,7 +387,7 @@ static int msgctl_down(struct ipc_namesp
 	rcu_read_lock();
 
 	ipcp = ipcctl_obtain_check(ns, &msg_ids(ns), msqid, cmd,
-				      &msqid64->msg_perm, msqid64->msg_qbytes);
+				      perm, msg_qbytes);
 	if (IS_ERR(ipcp)) {
 		err = PTR_ERR(ipcp);
 		goto out_unlock1;
@@ -409,18 +409,18 @@ static int msgctl_down(struct ipc_namesp
 	{
 		DEFINE_WAKE_Q(wake_q);
 
-		if (msqid64->msg_qbytes > ns->msg_ctlmnb &&
+		if (msg_qbytes > ns->msg_ctlmnb &&
 		    !capable(CAP_SYS_RESOURCE)) {
 			err = -EPERM;
 			goto out_unlock1;
 		}
 
 		ipc_lock_object(&msq->q_perm);
-		err = ipc_update_perm(&msqid64->msg_perm, ipcp);
+		err = ipc_update_perm(perm, ipcp);
 		if (err)
 			goto out_unlock0;
 
-		msq->q_qbytes = msqid64->msg_qbytes;
+		msq->q_qbytes = msg_qbytes;
 
 		msq->q_ctime = ktime_get_real_seconds();
 		/*
@@ -603,9 +603,10 @@ long ksys_msgctl(int msqid, int cmd, str
 	case IPC_SET:
 		if (copy_msqid_from_user(&msqid64, buf, version))
 			return -EFAULT;
-		/* fallthru */
+		return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm,
+				   msqid64.msg_qbytes);
 	case IPC_RMID:
-		return msgctl_down(ns, msqid, cmd, &msqid64);
+		return msgctl_down(ns, msqid, cmd, NULL, 0);
 	default:
 		return  -EINVAL;
 	}
@@ -724,9 +725,9 @@ long compat_ksys_msgctl(int msqid, int c
 	case IPC_SET:
 		if (copy_compat_msqid_from_user(&msqid64, uptr, version))
 			return -EFAULT;
-		/* fallthru */
+		return msgctl_down(ns, msqid, cmd, &msqid64.msg_perm, msqid64.msg_qbytes);
 	case IPC_RMID:
-		return msgctl_down(ns, msqid, cmd, &msqid64);
+		return msgctl_down(ns, msqid, cmd, NULL, 0);
 	default:
 		return -EINVAL;
 	}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 029/195] tracing: Fix sched switch start/stop refcount racy updates
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (27 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 028/195] ipc/msg.c: consolidate all xxxctl_down() functions Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 030/195] rcu: Avoid data-race in rcu_gp_fqs_check_wake() Greg Kroah-Hartman
                   ` (169 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Steven Rostedt (VMware),
	Joel Fernandes (Google),
	Peter Zijlstra, Thomas Gleixner, Paul E. McKenney,
	syzbot+774fddf07b7ab29a1e55, Mathieu Desnoyers

From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

commit 64ae572bc7d0060429e40e1c8d803ce5eb31a0d6 upstream.

Reading the sched_cmdline_ref and sched_tgid_ref initial state within
tracing_start_sched_switch without holding the sched_register_mutex is
racy against concurrent updates, which can lead to tracepoint probes
being registered more than once (and thus trigger warnings within
tracepoint.c).

[ May be the fix for this bug ]
Link: https://lore.kernel.org/r/000000000000ab6f84056c786b93@google.com

Link: http://lkml.kernel.org/r/20190817141208.15226-1-mathieu.desnoyers@efficios.com

Cc: stable@vger.kernel.org
CC: Steven Rostedt (VMware) <rostedt@goodmis.org>
CC: Joel Fernandes (Google) <joel@joelfernandes.org>
CC: Peter Zijlstra <peterz@infradead.org>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Paul E. McKenney <paulmck@linux.ibm.com>
Reported-by: syzbot+774fddf07b7ab29a1e55@syzkaller.appspotmail.com
Fixes: d914ba37d7145 ("tracing: Add support for recording tgid of tasks")
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/trace/trace_sched_switch.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -89,8 +89,10 @@ static void tracing_sched_unregister(voi
 
 static void tracing_start_sched_switch(int ops)
 {
-	bool sched_register = (!sched_cmdline_ref && !sched_tgid_ref);
+	bool sched_register;
+
 	mutex_lock(&sched_register_mutex);
+	sched_register = (!sched_cmdline_ref && !sched_tgid_ref);
 
 	switch (ops) {
 	case RECORD_CMDLINE:



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 030/195] rcu: Avoid data-race in rcu_gp_fqs_check_wake()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (28 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 029/195] tracing: Fix sched switch start/stop refcount racy updates Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 031/195] brcmfmac: Fix memory leak in brcmf_usbdev_qinit Greg Kroah-Hartman
                   ` (168 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet, syzbot, Paul E. McKenney

From: Eric Dumazet <edumazet@google.com>

commit 6935c3983b246d5fbfebd3b891c825e65c118f2d upstream.

The rcu_gp_fqs_check_wake() function uses rcu_preempt_blocked_readers_cgp()
to read ->gp_tasks while other cpus might overwrite this field.

We need READ_ONCE()/WRITE_ONCE() pairs to avoid compiler
tricks and KCSAN splats like the following :

BUG: KCSAN: data-race in rcu_gp_fqs_check_wake / rcu_preempt_deferred_qs_irqrestore

write to 0xffffffff85a7f190 of 8 bytes by task 7317 on cpu 0:
 rcu_preempt_deferred_qs_irqrestore+0x43d/0x580 kernel/rcu/tree_plugin.h:507
 rcu_read_unlock_special+0xec/0x370 kernel/rcu/tree_plugin.h:659
 __rcu_read_unlock+0xcf/0xe0 kernel/rcu/tree_plugin.h:394
 rcu_read_unlock include/linux/rcupdate.h:645 [inline]
 __ip_queue_xmit+0x3b0/0xa40 net/ipv4/ip_output.c:533
 ip_queue_xmit+0x45/0x60 include/net/ip.h:236
 __tcp_transmit_skb+0xdeb/0x1cd0 net/ipv4/tcp_output.c:1158
 __tcp_send_ack+0x246/0x300 net/ipv4/tcp_output.c:3685
 tcp_send_ack+0x34/0x40 net/ipv4/tcp_output.c:3691
 tcp_cleanup_rbuf+0x130/0x360 net/ipv4/tcp.c:1575
 tcp_recvmsg+0x633/0x1a30 net/ipv4/tcp.c:2179
 inet_recvmsg+0xbb/0x250 net/ipv4/af_inet.c:838
 sock_recvmsg_nosec net/socket.c:871 [inline]
 sock_recvmsg net/socket.c:889 [inline]
 sock_recvmsg+0x92/0xb0 net/socket.c:885
 sock_read_iter+0x15f/0x1e0 net/socket.c:967
 call_read_iter include/linux/fs.h:1864 [inline]
 new_sync_read+0x389/0x4f0 fs/read_write.c:414

read to 0xffffffff85a7f190 of 8 bytes by task 10 on cpu 1:
 rcu_gp_fqs_check_wake kernel/rcu/tree.c:1556 [inline]
 rcu_gp_fqs_check_wake+0x93/0xd0 kernel/rcu/tree.c:1546
 rcu_gp_fqs_loop+0x36c/0x580 kernel/rcu/tree.c:1611
 rcu_gp_kthread+0x143/0x220 kernel/rcu/tree.c:1768
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10 Comm: rcu_preempt Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
[ paulmck:  Added another READ_ONCE() for RCU CPU stall warnings. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/rcu/tree_plugin.h |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -267,7 +267,7 @@ static void rcu_preempt_ctxt_queue(struc
 	 * blocked tasks.
 	 */
 	if (!rnp->gp_tasks && (blkd_state & RCU_GP_BLKD)) {
-		rnp->gp_tasks = &t->rcu_node_entry;
+		WRITE_ONCE(rnp->gp_tasks, &t->rcu_node_entry);
 		WARN_ON_ONCE(rnp->completedqs == rnp->gp_seq);
 	}
 	if (!rnp->exp_tasks && (blkd_state & RCU_EXP_BLKD))
@@ -392,7 +392,7 @@ static void rcu_preempt_note_context_swi
  */
 static int rcu_preempt_blocked_readers_cgp(struct rcu_node *rnp)
 {
-	return rnp->gp_tasks != NULL;
+	return READ_ONCE(rnp->gp_tasks) != NULL;
 }
 
 /*
@@ -557,7 +557,7 @@ static void rcu_read_unlock_special(stru
 		trace_rcu_unlock_preempted_task(TPS("rcu_preempt"),
 						rnp->gp_seq, t->pid);
 		if (&t->rcu_node_entry == rnp->gp_tasks)
-			rnp->gp_tasks = np;
+			WRITE_ONCE(rnp->gp_tasks, np);
 		if (&t->rcu_node_entry == rnp->exp_tasks)
 			rnp->exp_tasks = np;
 		if (IS_ENABLED(CONFIG_RCU_BOOST)) {
@@ -716,7 +716,7 @@ rcu_preempt_check_blocked_tasks(struct r
 		dump_blkd_tasks(rsp, rnp, 10);
 	if (rcu_preempt_has_tasks(rnp) &&
 	    (rnp->qsmaskinit || rnp->wait_blkd_tasks)) {
-		rnp->gp_tasks = rnp->blkd_tasks.next;
+		WRITE_ONCE(rnp->gp_tasks, rnp->blkd_tasks.next);
 		t = container_of(rnp->gp_tasks, struct task_struct,
 				 rcu_node_entry);
 		trace_rcu_unlock_preempted_task(TPS("rcu_preempt-GPS"),
@@ -883,7 +883,8 @@ dump_blkd_tasks(struct rcu_state *rsp, s
 		pr_info("%s: %d:%d ->qsmask %#lx ->qsmaskinit %#lx ->qsmaskinitnext %#lx\n",
 			__func__, rnp1->grplo, rnp1->grphi, rnp1->qsmask, rnp1->qsmaskinit, rnp1->qsmaskinitnext);
 	pr_info("%s: ->gp_tasks %p ->boost_tasks %p ->exp_tasks %p\n",
-		__func__, rnp->gp_tasks, rnp->boost_tasks, rnp->exp_tasks);
+		__func__, READ_ONCE(rnp->gp_tasks), rnp->boost_tasks,
+		rnp->exp_tasks);
 	pr_info("%s: ->blkd_tasks", __func__);
 	i = 0;
 	list_for_each(lhp, &rnp->blkd_tasks) {



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 031/195] brcmfmac: Fix memory leak in brcmf_usbdev_qinit
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (29 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 030/195] rcu: Avoid data-race in rcu_gp_fqs_check_wake() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 032/195] usb: typec: tcpci: mask event interrupts when remove driver Greg Kroah-Hartman
                   ` (167 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Navid Emamdoost, Kalle Valo

From: Navid Emamdoost <navid.emamdoost@gmail.com>

commit 4282dc057d750c6a7dd92953564b15c26b54c22c upstream.

In the implementation of brcmf_usbdev_qinit() the allocated memory for
reqs is leaking if usb_alloc_urb() fails. Release reqs in the error
handling path.

Fixes: 71bb244ba2fd ("brcm80211: fmac: add USB support for bcm43235/6/8 chipsets")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
@@ -441,6 +441,7 @@ fail:
 			usb_free_urb(req->urb);
 		list_del(q->next);
 	}
+	kfree(reqs);
 	return NULL;
 
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 032/195] usb: typec: tcpci: mask event interrupts when remove driver
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (30 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 031/195] brcmfmac: Fix memory leak in brcmf_usbdev_qinit Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 033/195] usb: gadget: legacy: set max_speed to super-speed Greg Kroah-Hartman
                   ` (166 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Li Jun, Heikki Krogerus, Guenter Roeck

From: Jun Li <jun.li@nxp.com>

commit 3ba76256fc4e2a0d7fb26cc95459041ea0e88972 upstream.

This is to prevent any possible events generated while unregister
tpcm port.

Fixes: 74e656d6b055 ("staging: typec: Type-C Port Controller Interface driver (tcpci)")
Signed-off-by: Li Jun <jun.li@nxp.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/1579502333-4145-1-git-send-email-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/typec/tcpci.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/usb/typec/tcpci.c
+++ b/drivers/usb/typec/tcpci.c
@@ -581,6 +581,12 @@ static int tcpci_probe(struct i2c_client
 static int tcpci_remove(struct i2c_client *client)
 {
 	struct tcpci_chip *chip = i2c_get_clientdata(client);
+	int err;
+
+	/* Disable chip interrupts before unregistering port */
+	err = tcpci_write16(chip->tcpci, TCPC_ALERT_MASK, 0);
+	if (err < 0)
+		return err;
 
 	tcpci_unregister_port(chip->tcpci);
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 033/195] usb: gadget: legacy: set max_speed to super-speed
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (31 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 032/195] usb: typec: tcpci: mask event interrupts when remove driver Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 034/195] usb: gadget: f_ncm: Use atomic_t to track in-flight request Greg Kroah-Hartman
                   ` (165 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Roger Quadros, Felipe Balbi

From: Roger Quadros <rogerq@ti.com>

commit 463f67aec2837f981b0a0ce8617721ff59685c00 upstream.

These interfaces do support super-speed so let's not
limit maximum speed to high-speed.

Cc: <stable@vger.kernel.org>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/gadget/legacy/cdc2.c  |    2 +-
 drivers/usb/gadget/legacy/g_ffs.c |    2 +-
 drivers/usb/gadget/legacy/multi.c |    2 +-
 drivers/usb/gadget/legacy/ncm.c   |    2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/usb/gadget/legacy/cdc2.c
+++ b/drivers/usb/gadget/legacy/cdc2.c
@@ -225,7 +225,7 @@ static struct usb_composite_driver cdc_d
 	.name		= "g_cdc",
 	.dev		= &device_desc,
 	.strings	= dev_strings,
-	.max_speed	= USB_SPEED_HIGH,
+	.max_speed	= USB_SPEED_SUPER,
 	.bind		= cdc_bind,
 	.unbind		= cdc_unbind,
 };
--- a/drivers/usb/gadget/legacy/g_ffs.c
+++ b/drivers/usb/gadget/legacy/g_ffs.c
@@ -149,7 +149,7 @@ static struct usb_composite_driver gfs_d
 	.name		= DRIVER_NAME,
 	.dev		= &gfs_dev_desc,
 	.strings	= gfs_dev_strings,
-	.max_speed	= USB_SPEED_HIGH,
+	.max_speed	= USB_SPEED_SUPER,
 	.bind		= gfs_bind,
 	.unbind		= gfs_unbind,
 };
--- a/drivers/usb/gadget/legacy/multi.c
+++ b/drivers/usb/gadget/legacy/multi.c
@@ -482,7 +482,7 @@ static struct usb_composite_driver multi
 	.name		= "g_multi",
 	.dev		= &device_desc,
 	.strings	= dev_strings,
-	.max_speed	= USB_SPEED_HIGH,
+	.max_speed	= USB_SPEED_SUPER,
 	.bind		= multi_bind,
 	.unbind		= multi_unbind,
 	.needs_serial	= 1,
--- a/drivers/usb/gadget/legacy/ncm.c
+++ b/drivers/usb/gadget/legacy/ncm.c
@@ -197,7 +197,7 @@ static struct usb_composite_driver ncm_d
 	.name		= "g_ncm",
 	.dev		= &device_desc,
 	.strings	= dev_strings,
-	.max_speed	= USB_SPEED_HIGH,
+	.max_speed	= USB_SPEED_SUPER,
 	.bind		= gncm_bind,
 	.unbind		= gncm_unbind,
 };



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 034/195] usb: gadget: f_ncm: Use atomic_t to track in-flight request
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (32 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 033/195] usb: gadget: legacy: set max_speed to super-speed Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 035/195] usb: gadget: f_ecm: " Greg Kroah-Hartman
                   ` (164 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Bryan ODonoghue, Felipe Balbi

From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

commit 5b24c28cfe136597dc3913e1c00b119307a20c7e upstream.

Currently ncm->notify_req is used to flag when a request is in-flight.
ncm->notify_req is set to NULL and when a request completes it is
subsequently reset.

This is fundamentally buggy in that the unbind logic of the NCM driver will
unconditionally free ncm->notify_req leading to a NULL pointer dereference.

Fixes: 40d133d7f542 ("usb: gadget: f_ncm: convert to new function interface with backward compatibility")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/gadget/function/f_ncm.c |   17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -54,6 +54,7 @@ struct f_ncm {
 	struct usb_ep			*notify;
 	struct usb_request		*notify_req;
 	u8				notify_state;
+	atomic_t			notify_count;
 	bool				is_open;
 
 	const struct ndp_parser_opts	*parser_opts;
@@ -547,7 +548,7 @@ static void ncm_do_notify(struct f_ncm *
 	int				status;
 
 	/* notification already in flight? */
-	if (!req)
+	if (atomic_read(&ncm->notify_count))
 		return;
 
 	event = req->buf;
@@ -587,7 +588,8 @@ static void ncm_do_notify(struct f_ncm *
 	event->bmRequestType = 0xA1;
 	event->wIndex = cpu_to_le16(ncm->ctrl_id);
 
-	ncm->notify_req = NULL;
+	atomic_inc(&ncm->notify_count);
+
 	/*
 	 * In double buffering if there is a space in FIFO,
 	 * completion callback can be called right after the call,
@@ -597,7 +599,7 @@ static void ncm_do_notify(struct f_ncm *
 	status = usb_ep_queue(ncm->notify, req, GFP_ATOMIC);
 	spin_lock(&ncm->lock);
 	if (status < 0) {
-		ncm->notify_req = req;
+		atomic_dec(&ncm->notify_count);
 		DBG(cdev, "notify --> %d\n", status);
 	}
 }
@@ -632,17 +634,19 @@ static void ncm_notify_complete(struct u
 	case 0:
 		VDBG(cdev, "Notification %02x sent\n",
 		     event->bNotificationType);
+		atomic_dec(&ncm->notify_count);
 		break;
 	case -ECONNRESET:
 	case -ESHUTDOWN:
+		atomic_set(&ncm->notify_count, 0);
 		ncm->notify_state = NCM_NOTIFY_NONE;
 		break;
 	default:
 		DBG(cdev, "event %02x --> %d\n",
 			event->bNotificationType, req->status);
+		atomic_dec(&ncm->notify_count);
 		break;
 	}
-	ncm->notify_req = req;
 	ncm_do_notify(ncm);
 	spin_unlock(&ncm->lock);
 }
@@ -1612,6 +1616,11 @@ static void ncm_unbind(struct usb_config
 	ncm_string_defs[0].id = 0;
 	usb_free_all_descriptors(f);
 
+	if (atomic_read(&ncm->notify_count)) {
+		usb_ep_dequeue(ncm->notify, ncm->notify_req);
+		atomic_set(&ncm->notify_count, 0);
+	}
+
 	kfree(ncm->notify_req->buf);
 	usb_ep_free_request(ncm->notify, ncm->notify_req);
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 035/195] usb: gadget: f_ecm: Use atomic_t to track in-flight request
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (33 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 034/195] usb: gadget: f_ncm: Use atomic_t to track in-flight request Greg Kroah-Hartman
@ 2020-02-10 12:31 ` " Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 036/195] ALSA: usb-audio: Fix endianess in descriptor validation Greg Kroah-Hartman
                   ` (163 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Bryan ODonoghue, Felipe Balbi

From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

commit d710562e01c48d59be3f60d58b7a85958b39aeda upstream.

Currently ecm->notify_req is used to flag when a request is in-flight.
ecm->notify_req is set to NULL and when a request completes it is
subsequently reset.

This is fundamentally buggy in that the unbind logic of the ECM driver will
unconditionally free ecm->notify_req leading to a NULL pointer dereference.

Fixes: da741b8c56d6 ("usb ethernet gadget: split CDC Ethernet function")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/gadget/function/f_ecm.c |   16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

--- a/drivers/usb/gadget/function/f_ecm.c
+++ b/drivers/usb/gadget/function/f_ecm.c
@@ -52,6 +52,7 @@ struct f_ecm {
 	struct usb_ep			*notify;
 	struct usb_request		*notify_req;
 	u8				notify_state;
+	atomic_t			notify_count;
 	bool				is_open;
 
 	/* FIXME is_open needs some irq-ish locking
@@ -380,7 +381,7 @@ static void ecm_do_notify(struct f_ecm *
 	int				status;
 
 	/* notification already in flight? */
-	if (!req)
+	if (atomic_read(&ecm->notify_count))
 		return;
 
 	event = req->buf;
@@ -420,10 +421,10 @@ static void ecm_do_notify(struct f_ecm *
 	event->bmRequestType = 0xA1;
 	event->wIndex = cpu_to_le16(ecm->ctrl_id);
 
-	ecm->notify_req = NULL;
+	atomic_inc(&ecm->notify_count);
 	status = usb_ep_queue(ecm->notify, req, GFP_ATOMIC);
 	if (status < 0) {
-		ecm->notify_req = req;
+		atomic_dec(&ecm->notify_count);
 		DBG(cdev, "notify --> %d\n", status);
 	}
 }
@@ -448,17 +449,19 @@ static void ecm_notify_complete(struct u
 	switch (req->status) {
 	case 0:
 		/* no fault */
+		atomic_dec(&ecm->notify_count);
 		break;
 	case -ECONNRESET:
 	case -ESHUTDOWN:
+		atomic_set(&ecm->notify_count, 0);
 		ecm->notify_state = ECM_NOTIFY_NONE;
 		break;
 	default:
 		DBG(cdev, "event %02x --> %d\n",
 			event->bNotificationType, req->status);
+		atomic_dec(&ecm->notify_count);
 		break;
 	}
-	ecm->notify_req = req;
 	ecm_do_notify(ecm);
 }
 
@@ -907,6 +910,11 @@ static void ecm_unbind(struct usb_config
 
 	usb_free_all_descriptors(f);
 
+	if (atomic_read(&ecm->notify_count)) {
+		usb_ep_dequeue(ecm->notify, ecm->notify_req);
+		atomic_set(&ecm->notify_count, 0);
+	}
+
 	kfree(ecm->notify_req->buf);
 	usb_ep_free_request(ecm->notify, ecm->notify_req);
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 036/195] ALSA: usb-audio: Fix endianess in descriptor validation
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (34 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 035/195] usb: gadget: f_ecm: " Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 037/195] ALSA: dummy: Fix PCM format loop in proc output Greg Kroah-Hartman
                   ` (162 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Takashi Iwai

From: Takashi Iwai <tiwai@suse.de>

commit f8e5f90b3a53bb75f05124ed19156388379a337d upstream.

I overlooked that some fields are words and need the converts from
LE in the recently added USB descriptor validation code.
This patch fixes those with the proper macro usages.

Fixes: 57f8770620e9 ("ALSA: usb-audio: More validations of descriptor units")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200201080530.22390-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/usb/validate.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/sound/usb/validate.c
+++ b/sound/usb/validate.c
@@ -110,7 +110,7 @@ static bool validate_processing_unit(con
 	default:
 		if (v->type == UAC1_EXTENSION_UNIT)
 			return true; /* OK */
-		switch (d->wProcessType) {
+		switch (le16_to_cpu(d->wProcessType)) {
 		case UAC_PROCESS_UP_DOWNMIX:
 		case UAC_PROCESS_DOLBY_PROLOGIC:
 			if (d->bLength < len + 1) /* bNrModes */
@@ -125,7 +125,7 @@ static bool validate_processing_unit(con
 	case UAC_VERSION_2:
 		if (v->type == UAC2_EXTENSION_UNIT_V2)
 			return true; /* OK */
-		switch (d->wProcessType) {
+		switch (le16_to_cpu(d->wProcessType)) {
 		case UAC2_PROCESS_UP_DOWNMIX:
 		case UAC2_PROCESS_DOLBY_PROLOCIC: /* SiC! */
 			if (d->bLength < len + 1) /* bNrModes */
@@ -142,7 +142,7 @@ static bool validate_processing_unit(con
 			len += 2; /* wClusterDescrID */
 			break;
 		}
-		switch (d->wProcessType) {
+		switch (le16_to_cpu(d->wProcessType)) {
 		case UAC3_PROCESS_UP_DOWNMIX:
 			if (d->bLength < len + 1) /* bNrModes */
 				return false;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 037/195] ALSA: dummy: Fix PCM format loop in proc output
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (35 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 036/195] ALSA: usb-audio: Fix endianess in descriptor validation Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 038/195] mm/memory_hotplug: fix remove_memory() lockdep splat Greg Kroah-Hartman
                   ` (161 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Takashi Iwai

From: Takashi Iwai <tiwai@suse.de>

commit 2acf25f13ebe8beb40e97a1bbe76f36277c64f1e upstream.

The loop termination for iterating over all formats should contain
SNDRV_PCM_FORMAT_LAST, not less than it.

Fixes: 9b151fec139d ("ALSA: dummy - Add debug proc file")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200201080530.22390-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/drivers/dummy.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -929,7 +929,7 @@ static void print_formats(struct snd_dum
 {
 	int i;
 
-	for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
+	for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
 		if (dummy->pcm_hw.formats & (1ULL << i))
 			snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
 	}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 038/195] mm/memory_hotplug: fix remove_memory() lockdep splat
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (36 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 037/195] ALSA: dummy: Fix PCM format loop in proc output Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 039/195] mm: move_pages: report the number of non-attempted pages Greg Kroah-Hartman
                   ` (160 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Dan Williams, Michal Hocko,
	David Hildenbrand, Vishal Verma, Pavel Tatashin, Dave Hansen,
	Andrew Morton, Linus Torvalds

From: Dan Williams <dan.j.williams@intel.com>

commit f1037ec0cc8ac1a450974ad9754e991f72884f48 upstream.

The daxctl unit test for the dax_kmem driver currently triggers the
(false positive) lockdep splat below.  It results from the fact that
remove_memory_block_devices() is invoked under the mem_hotplug_lock()
causing lockdep entanglements with cpu_hotplug_lock() and sysfs (kernfs
active state tracking).  It is a false positive because the sysfs
attribute path triggering the memory remove is not the same attribute
path associated with memory-block device.

sysfs_break_active_protection() is not applicable since there is no real
deadlock conflict, instead move memory-block device removal outside the
lock.  The mem_hotplug_lock() is not needed to synchronize the
memory-block device removal vs the page online state, that is already
handled by lock_device_hotplug().  Specifically, lock_device_hotplug()
is sufficient to allow try_remove_memory() to check the offline state of
the memblocks and be assured that any in progress online attempts are
flushed / blocked by kernfs_drain() / attribute removal.

The add_memory() path safely creates memblock devices under the
mem_hotplug_lock().  There is no kernfs active state synchronization in
the memblock device_register() path, so nothing to fix there.

This change is only possible thanks to the recent change that refactored
memory block device removal out of arch_remove_memory() (commit
4c4b7f9ba948 "mm/memory_hotplug: remove memory block devices before
arch_remove_memory()"), and David's due diligence tracking down the
guarantees afforded by kernfs_drain().  Not flagged for -stable since
this only impacts ongoing development and lockdep validation, not a
runtime issue.

    ======================================================
    WARNING: possible circular locking dependency detected
    5.5.0-rc3+ #230 Tainted: G           OE
    ------------------------------------------------------
    lt-daxctl/6459 is trying to acquire lock:
    ffff99c7f0003510 (kn->count#241){++++}, at: kernfs_remove_by_name_ns+0x41/0x80

    but task is already holding lock:
    ffffffffa76a5450 (mem_hotplug_lock.rw_sem){++++}, at: percpu_down_write+0x20/0xe0

    which lock already depends on the new lock.

    the existing dependency chain (in reverse order) is:

    -> #2 (mem_hotplug_lock.rw_sem){++++}:
           __lock_acquire+0x39c/0x790
           lock_acquire+0xa2/0x1b0
           get_online_mems+0x3e/0xb0
           kmem_cache_create_usercopy+0x2e/0x260
           kmem_cache_create+0x12/0x20
           ptlock_cache_init+0x20/0x28
           start_kernel+0x243/0x547
           secondary_startup_64+0xb6/0xc0

    -> #1 (cpu_hotplug_lock.rw_sem){++++}:
           __lock_acquire+0x39c/0x790
           lock_acquire+0xa2/0x1b0
           cpus_read_lock+0x3e/0xb0
           online_pages+0x37/0x300
           memory_subsys_online+0x17d/0x1c0
           device_online+0x60/0x80
           state_store+0x65/0xd0
           kernfs_fop_write+0xcf/0x1c0
           vfs_write+0xdb/0x1d0
           ksys_write+0x65/0xe0
           do_syscall_64+0x5c/0xa0
           entry_SYSCALL_64_after_hwframe+0x49/0xbe

    -> #0 (kn->count#241){++++}:
           check_prev_add+0x98/0xa40
           validate_chain+0x576/0x860
           __lock_acquire+0x39c/0x790
           lock_acquire+0xa2/0x1b0
           __kernfs_remove+0x25f/0x2e0
           kernfs_remove_by_name_ns+0x41/0x80
           remove_files.isra.0+0x30/0x70
           sysfs_remove_group+0x3d/0x80
           sysfs_remove_groups+0x29/0x40
           device_remove_attrs+0x39/0x70
           device_del+0x16a/0x3f0
           device_unregister+0x16/0x60
           remove_memory_block_devices+0x82/0xb0
           try_remove_memory+0xb5/0x130
           remove_memory+0x26/0x40
           dev_dax_kmem_remove+0x44/0x6a [kmem]
           device_release_driver_internal+0xe4/0x1c0
           unbind_store+0xef/0x120
           kernfs_fop_write+0xcf/0x1c0
           vfs_write+0xdb/0x1d0
           ksys_write+0x65/0xe0
           do_syscall_64+0x5c/0xa0
           entry_SYSCALL_64_after_hwframe+0x49/0xbe

    other info that might help us debug this:

    Chain exists of:
      kn->count#241 --> cpu_hotplug_lock.rw_sem --> mem_hotplug_lock.rw_sem

     Possible unsafe locking scenario:

           CPU0                    CPU1
           ----                    ----
      lock(mem_hotplug_lock.rw_sem);
                                   lock(cpu_hotplug_lock.rw_sem);
                                   lock(mem_hotplug_lock.rw_sem);
      lock(kn->count#241);

     *** DEADLOCK ***

No fixes tag as this has been a long standing issue that predated the
addition of kernfs lockdep annotations.

Link: http://lkml.kernel.org/r/157991441887.2763922.4770790047389427325.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 mm/memory_hotplug.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1902,8 +1902,6 @@ void __ref __remove_memory(int nid, u64
 
 	BUG_ON(check_hotplug_memory_range(start, size));
 
-	mem_hotplug_begin();
-
 	/*
 	 * All memory blocks must be offlined before removing memory.  Check
 	 * whether all memory blocks in question are offline and trigger a BUG()
@@ -1919,9 +1917,14 @@ void __ref __remove_memory(int nid, u64
 	memblock_free(start, size);
 	memblock_remove(start, size);
 
-	/* remove memory block devices before removing memory */
+	/*
+	 * Memory block device removal under the device_hotplug_lock is
+	 * a barrier against racing online attempts.
+	 */
 	remove_memory_block_devices(start, size);
 
+	mem_hotplug_begin();
+
 	arch_remove_memory(nid, start, size, NULL);
 	__release_memory_resource(start, size);
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 039/195] mm: move_pages: report the number of non-attempted pages
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (37 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 038/195] mm/memory_hotplug: fix remove_memory() lockdep splat Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 040/195] media/v4l2-core: set pages dirty upon releasing DMA buffers Greg Kroah-Hartman
                   ` (159 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Yang Shi, Michal Hocko, Wei Yang,
	Andrew Morton, Linus Torvalds

From: Yang Shi <yang.shi@linux.alibaba.com>

commit 5984fabb6e82d9ab4e6305cb99694c85d46de8ae upstream.

Since commit a49bd4d71637 ("mm, numa: rework do_pages_move"), the
semantic of move_pages() has changed to return the number of
non-migrated pages if they were result of a non-fatal reasons (usually a
busy page).

This was an unintentional change that hasn't been noticed except for LTP
tests which checked for the documented behavior.

There are two ways to go around this change.  We can even get back to
the original behavior and return -EAGAIN whenever migrate_pages is not
able to migrate pages due to non-fatal reasons.  Another option would be
to simply continue with the changed semantic and extend move_pages
documentation to clarify that -errno is returned on an invalid input or
when migration simply cannot succeed (e.g.  -ENOMEM, -EBUSY) or the
number of pages that couldn't have been migrated due to ephemeral
reasons (e.g.  page is pinned or locked for other reasons).

This patch implements the second option because this behavior is in
place for some time without anybody complaining and possibly new users
depending on it.  Also it allows to have a slightly easier error
handling as the caller knows that it is worth to retry when err > 0.

But since the new semantic would be aborted immediately if migration is
failed due to ephemeral reasons, need include the number of
non-attempted pages in the return value too.

Link: http://lkml.kernel.org/r/1580160527-109104-1-git-send-email-yang.shi@linux.alibaba.com
Fixes: a49bd4d71637 ("mm, numa: rework do_pages_move")
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Wei Yang <richardw.yang@linux.intel.com>
Cc: <stable@vger.kernel.org>    [4.17+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 mm/migrate.c |   25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1623,8 +1623,19 @@ static int do_pages_move(struct mm_struc
 			start = i;
 		} else if (node != current_node) {
 			err = do_move_pages_to_node(mm, &pagelist, current_node);
-			if (err)
+			if (err) {
+				/*
+				 * Positive err means the number of failed
+				 * pages to migrate.  Since we are going to
+				 * abort and return the number of non-migrated
+				 * pages, so need to incude the rest of the
+				 * nr_pages that have not been attempted as
+				 * well.
+				 */
+				if (err > 0)
+					err += nr_pages - i - 1;
 				goto out;
+			}
 			err = store_status(status, start, current_node, i - start);
 			if (err)
 				goto out;
@@ -1655,8 +1666,11 @@ static int do_pages_move(struct mm_struc
 			goto out_flush;
 
 		err = do_move_pages_to_node(mm, &pagelist, current_node);
-		if (err)
+		if (err) {
+			if (err > 0)
+				err += nr_pages - i - 1;
 			goto out;
+		}
 		if (i > start) {
 			err = store_status(status, start, current_node, i - start);
 			if (err)
@@ -1670,6 +1684,13 @@ out_flush:
 
 	/* Make sure we do not overwrite the existing error */
 	err1 = do_move_pages_to_node(mm, &pagelist, current_node);
+	/*
+	 * Don't have to report non-attempted pages here since:
+	 *     - If the above loop is done gracefully all pages have been
+	 *       attempted.
+	 *     - If the above loop is aborted it means a fatal error
+	 *       happened, should return ret.
+	 */
 	if (!err1)
 		err1 = store_status(status, start, current_node, i - start);
 	if (err >= 0)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 040/195] media/v4l2-core: set pages dirty upon releasing DMA buffers
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (38 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 039/195] mm: move_pages: report the number of non-attempted pages Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 041/195] media: v4l2-core: compat: ignore native command codes Greg Kroah-Hartman
                   ` (158 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, John Hubbard, Christoph Hellwig,
	Hans Verkuil, Mauro Carvalho Chehab, Alex Williamson,
	Aneesh Kumar K.V, Björn Töpel, Daniel Vetter,
	Dan Williams, Ira Weiny, Jan Kara, Jason Gunthorpe,
	Jason Gunthorpe, Jens Axboe, Jerome Glisse, Jonathan Corbet,
	Kirill A. Shutemov, Leon Romanovsky, Mike Rapoport,
	Andrew Morton, Linus Torvalds

From: John Hubbard <jhubbard@nvidia.com>

commit 3c7470b6f68434acae459482ab920d1e3fabd1c7 upstream.

After DMA is complete, and the device and CPU caches are synchronized,
it's still required to mark the CPU pages as dirty, if the data was
coming from the device.  However, this driver was just issuing a bare
put_page() call, without any set_page_dirty*() call.

Fix the problem, by calling set_page_dirty_lock() if the CPU pages were
potentially receiving data from the device.

Link: http://lkml.kernel.org/r/20200107224558.2362728-11-jhubbard@nvidia.com
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: <stable@vger.kernel.org>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Björn Töpel <bjorn.topel@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Leon Romanovsky <leonro@mellanox.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/v4l2-core/videobuf-dma-sg.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/media/v4l2-core/videobuf-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf-dma-sg.c
@@ -352,8 +352,11 @@ int videobuf_dma_free(struct videobuf_dm
 	BUG_ON(dma->sglen);
 
 	if (dma->pages) {
-		for (i = 0; i < dma->nr_pages; i++)
+		for (i = 0; i < dma->nr_pages; i++) {
+			if (dma->direction == DMA_FROM_DEVICE)
+				set_page_dirty_lock(dma->pages[i]);
 			put_page(dma->pages[i]);
+		}
 		kfree(dma->pages);
 		dma->pages = NULL;
 	}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 041/195] media: v4l2-core: compat: ignore native command codes
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (39 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 040/195] media/v4l2-core: set pages dirty upon releasing DMA buffers Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 042/195] media: v4l2-rect.h: fix v4l2_rect_map_inside() top/left adjustments Greg Kroah-Hartman
                   ` (157 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Arnd Bergmann, Hans Verkuil,
	Mauro Carvalho Chehab

From: Arnd Bergmann <arnd@arndb.de>

commit 4a873f3fa5d6ca52e446d306dd7194dd86a09422 upstream.

The do_video_ioctl() compat handler converts the compat command
codes into the native ones before processing further, but this
causes problems for 32-bit user applications that pass a command
code that matches a 64-bit native number, which will then be
handled the same way.

Specifically, this breaks VIDIOC_DQEVENT_TIME from user space
applications with 64-bit time_t, as the structure layout is
the same as the native 64-bit layout on many architectures
(x86 being the notable exception).

Change the handler to use the converted command code only for
passing into the native ioctl handler, not for deciding on the
conversion, in order to make the compat behavior match the
native behavior.

Actual support for the 64-bit time_t version of VIDIOC_DQEVENT_TIME
and other commands still needs to be added in a separate patch.

Cc: stable@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/v4l2-core/v4l2-compat-ioctl32.c |  148 +++++++++++++-------------
 1 file changed, 75 insertions(+), 73 deletions(-)

--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -1171,36 +1171,38 @@ static long do_video_ioctl(struct file *
 	u32 aux_space;
 	int compatible_arg = 1;
 	long err = 0;
+	unsigned int ncmd;
 
 	/*
 	 * 1. When struct size is different, converts the command.
 	 */
 	switch (cmd) {
-	case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break;
-	case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break;
-	case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break;
-	case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break;
-	case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break;
-	case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break;
-	case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break;
-	case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break;
-	case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break;
-	case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break;
-	case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break;
-	case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break;
-	case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break;
-	case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break;
-	case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break;
-	case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break;
-	case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break;
-	case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break;
-	case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break;
-	case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break;
-	case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break;
-	case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break;
-	case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break;
-	case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break;
-	case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break;
+	case VIDIOC_G_FMT32: ncmd = VIDIOC_G_FMT; break;
+	case VIDIOC_S_FMT32: ncmd = VIDIOC_S_FMT; break;
+	case VIDIOC_QUERYBUF32: ncmd = VIDIOC_QUERYBUF; break;
+	case VIDIOC_G_FBUF32: ncmd = VIDIOC_G_FBUF; break;
+	case VIDIOC_S_FBUF32: ncmd = VIDIOC_S_FBUF; break;
+	case VIDIOC_QBUF32: ncmd = VIDIOC_QBUF; break;
+	case VIDIOC_DQBUF32: ncmd = VIDIOC_DQBUF; break;
+	case VIDIOC_ENUMSTD32: ncmd = VIDIOC_ENUMSTD; break;
+	case VIDIOC_ENUMINPUT32: ncmd = VIDIOC_ENUMINPUT; break;
+	case VIDIOC_TRY_FMT32: ncmd = VIDIOC_TRY_FMT; break;
+	case VIDIOC_G_EXT_CTRLS32: ncmd = VIDIOC_G_EXT_CTRLS; break;
+	case VIDIOC_S_EXT_CTRLS32: ncmd = VIDIOC_S_EXT_CTRLS; break;
+	case VIDIOC_TRY_EXT_CTRLS32: ncmd = VIDIOC_TRY_EXT_CTRLS; break;
+	case VIDIOC_DQEVENT32: ncmd = VIDIOC_DQEVENT; break;
+	case VIDIOC_OVERLAY32: ncmd = VIDIOC_OVERLAY; break;
+	case VIDIOC_STREAMON32: ncmd = VIDIOC_STREAMON; break;
+	case VIDIOC_STREAMOFF32: ncmd = VIDIOC_STREAMOFF; break;
+	case VIDIOC_G_INPUT32: ncmd = VIDIOC_G_INPUT; break;
+	case VIDIOC_S_INPUT32: ncmd = VIDIOC_S_INPUT; break;
+	case VIDIOC_G_OUTPUT32: ncmd = VIDIOC_G_OUTPUT; break;
+	case VIDIOC_S_OUTPUT32: ncmd = VIDIOC_S_OUTPUT; break;
+	case VIDIOC_CREATE_BUFS32: ncmd = VIDIOC_CREATE_BUFS; break;
+	case VIDIOC_PREPARE_BUF32: ncmd = VIDIOC_PREPARE_BUF; break;
+	case VIDIOC_G_EDID32: ncmd = VIDIOC_G_EDID; break;
+	case VIDIOC_S_EDID32: ncmd = VIDIOC_S_EDID; break;
+	default: ncmd = cmd; break;
 	}
 
 	/*
@@ -1209,11 +1211,11 @@ static long do_video_ioctl(struct file *
 	 * argument into it.
 	 */
 	switch (cmd) {
-	case VIDIOC_OVERLAY:
-	case VIDIOC_STREAMON:
-	case VIDIOC_STREAMOFF:
-	case VIDIOC_S_INPUT:
-	case VIDIOC_S_OUTPUT:
+	case VIDIOC_OVERLAY32:
+	case VIDIOC_STREAMON32:
+	case VIDIOC_STREAMOFF32:
+	case VIDIOC_S_INPUT32:
+	case VIDIOC_S_OUTPUT32:
 		err = alloc_userspace(sizeof(unsigned int), 0, &new_p64);
 		if (!err && assign_in_user((unsigned int __user *)new_p64,
 					   (compat_uint_t __user *)p32))
@@ -1221,23 +1223,23 @@ static long do_video_ioctl(struct file *
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_G_INPUT:
-	case VIDIOC_G_OUTPUT:
+	case VIDIOC_G_INPUT32:
+	case VIDIOC_G_OUTPUT32:
 		err = alloc_userspace(sizeof(unsigned int), 0, &new_p64);
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_G_EDID:
-	case VIDIOC_S_EDID:
+	case VIDIOC_G_EDID32:
+	case VIDIOC_S_EDID32:
 		err = alloc_userspace(sizeof(struct v4l2_edid), 0, &new_p64);
 		if (!err)
 			err = get_v4l2_edid32(new_p64, p32);
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_G_FMT:
-	case VIDIOC_S_FMT:
-	case VIDIOC_TRY_FMT:
+	case VIDIOC_G_FMT32:
+	case VIDIOC_S_FMT32:
+	case VIDIOC_TRY_FMT32:
 		err = bufsize_v4l2_format(p32, &aux_space);
 		if (!err)
 			err = alloc_userspace(sizeof(struct v4l2_format),
@@ -1250,7 +1252,7 @@ static long do_video_ioctl(struct file *
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_CREATE_BUFS:
+	case VIDIOC_CREATE_BUFS32:
 		err = bufsize_v4l2_create(p32, &aux_space);
 		if (!err)
 			err = alloc_userspace(sizeof(struct v4l2_create_buffers),
@@ -1263,10 +1265,10 @@ static long do_video_ioctl(struct file *
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_PREPARE_BUF:
-	case VIDIOC_QUERYBUF:
-	case VIDIOC_QBUF:
-	case VIDIOC_DQBUF:
+	case VIDIOC_PREPARE_BUF32:
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
 		err = bufsize_v4l2_buffer(p32, &aux_space);
 		if (!err)
 			err = alloc_userspace(sizeof(struct v4l2_buffer),
@@ -1279,7 +1281,7 @@ static long do_video_ioctl(struct file *
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_S_FBUF:
+	case VIDIOC_S_FBUF32:
 		err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
 				      &new_p64);
 		if (!err)
@@ -1287,13 +1289,13 @@ static long do_video_ioctl(struct file *
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_G_FBUF:
+	case VIDIOC_G_FBUF32:
 		err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0,
 				      &new_p64);
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_ENUMSTD:
+	case VIDIOC_ENUMSTD32:
 		err = alloc_userspace(sizeof(struct v4l2_standard), 0,
 				      &new_p64);
 		if (!err)
@@ -1301,16 +1303,16 @@ static long do_video_ioctl(struct file *
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_ENUMINPUT:
+	case VIDIOC_ENUMINPUT32:
 		err = alloc_userspace(sizeof(struct v4l2_input), 0, &new_p64);
 		if (!err)
 			err = get_v4l2_input32(new_p64, p32);
 		compatible_arg = 0;
 		break;
 
-	case VIDIOC_G_EXT_CTRLS:
-	case VIDIOC_S_EXT_CTRLS:
-	case VIDIOC_TRY_EXT_CTRLS:
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32:
 		err = bufsize_v4l2_ext_controls(p32, &aux_space);
 		if (!err)
 			err = alloc_userspace(sizeof(struct v4l2_ext_controls),
@@ -1322,7 +1324,7 @@ static long do_video_ioctl(struct file *
 		}
 		compatible_arg = 0;
 		break;
-	case VIDIOC_DQEVENT:
+	case VIDIOC_DQEVENT32:
 		err = alloc_userspace(sizeof(struct v4l2_event), 0, &new_p64);
 		compatible_arg = 0;
 		break;
@@ -1340,9 +1342,9 @@ static long do_video_ioctl(struct file *
 	 * Otherwise, it will pass the newly allocated @new_p64 argument.
 	 */
 	if (compatible_arg)
-		err = native_ioctl(file, cmd, (unsigned long)p32);
+		err = native_ioctl(file, ncmd, (unsigned long)p32);
 	else
-		err = native_ioctl(file, cmd, (unsigned long)new_p64);
+		err = native_ioctl(file, ncmd, (unsigned long)new_p64);
 
 	if (err == -ENOTTY)
 		return err;
@@ -1358,13 +1360,13 @@ static long do_video_ioctl(struct file *
 	 * the blocks to maximum allowed value.
 	 */
 	switch (cmd) {
-	case VIDIOC_G_EXT_CTRLS:
-	case VIDIOC_S_EXT_CTRLS:
-	case VIDIOC_TRY_EXT_CTRLS:
+	case VIDIOC_G_EXT_CTRLS32:
+	case VIDIOC_S_EXT_CTRLS32:
+	case VIDIOC_TRY_EXT_CTRLS32:
 		if (put_v4l2_ext_controls32(file, new_p64, p32))
 			err = -EFAULT;
 		break;
-	case VIDIOC_S_EDID:
+	case VIDIOC_S_EDID32:
 		if (put_v4l2_edid32(new_p64, p32))
 			err = -EFAULT;
 		break;
@@ -1377,49 +1379,49 @@ static long do_video_ioctl(struct file *
 	 * the original 32 bits structure.
 	 */
 	switch (cmd) {
-	case VIDIOC_S_INPUT:
-	case VIDIOC_S_OUTPUT:
-	case VIDIOC_G_INPUT:
-	case VIDIOC_G_OUTPUT:
+	case VIDIOC_S_INPUT32:
+	case VIDIOC_S_OUTPUT32:
+	case VIDIOC_G_INPUT32:
+	case VIDIOC_G_OUTPUT32:
 		if (assign_in_user((compat_uint_t __user *)p32,
 				   ((unsigned int __user *)new_p64)))
 			err = -EFAULT;
 		break;
 
-	case VIDIOC_G_FBUF:
+	case VIDIOC_G_FBUF32:
 		err = put_v4l2_framebuffer32(new_p64, p32);
 		break;
 
-	case VIDIOC_DQEVENT:
+	case VIDIOC_DQEVENT32:
 		err = put_v4l2_event32(new_p64, p32);
 		break;
 
-	case VIDIOC_G_EDID:
+	case VIDIOC_G_EDID32:
 		err = put_v4l2_edid32(new_p64, p32);
 		break;
 
-	case VIDIOC_G_FMT:
-	case VIDIOC_S_FMT:
-	case VIDIOC_TRY_FMT:
+	case VIDIOC_G_FMT32:
+	case VIDIOC_S_FMT32:
+	case VIDIOC_TRY_FMT32:
 		err = put_v4l2_format32(new_p64, p32);
 		break;
 
-	case VIDIOC_CREATE_BUFS:
+	case VIDIOC_CREATE_BUFS32:
 		err = put_v4l2_create32(new_p64, p32);
 		break;
 
-	case VIDIOC_PREPARE_BUF:
-	case VIDIOC_QUERYBUF:
-	case VIDIOC_QBUF:
-	case VIDIOC_DQBUF:
+	case VIDIOC_PREPARE_BUF32:
+	case VIDIOC_QUERYBUF32:
+	case VIDIOC_QBUF32:
+	case VIDIOC_DQBUF32:
 		err = put_v4l2_buffer32(new_p64, p32);
 		break;
 
-	case VIDIOC_ENUMSTD:
+	case VIDIOC_ENUMSTD32:
 		err = put_v4l2_standard32(new_p64, p32);
 		break;
 
-	case VIDIOC_ENUMINPUT:
+	case VIDIOC_ENUMINPUT32:
 		err = put_v4l2_input32(new_p64, p32);
 		break;
 	}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 042/195] media: v4l2-rect.h: fix v4l2_rect_map_inside() top/left adjustments
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (40 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 041/195] media: v4l2-core: compat: ignore native command codes Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 043/195] lib/test_kasan.c: fix memory leak in kmalloc_oob_krealloc_more() Greg Kroah-Hartman
                   ` (156 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Helen Koike, Hans Verkuil,
	Mauro Carvalho Chehab

From: Helen Koike <helen.koike@collabora.com>

commit f51e50db4c20d46930b33be3f208851265694f3e upstream.

boundary->width and boundary->height are sizes relative to
boundary->left and boundary->top coordinates, but they were not being
taken into consideration to adjust r->left and r->top, leading to the
following error:

Consider the follow as initial values for boundary and r:

struct v4l2_rect boundary = {
	.left = 100,
	.top = 100,
	.width = 800,
	.height = 600,
}

struct v4l2_rect r = {
	.left = 0,
	.top = 0,
	.width = 1920,
	.height = 960,
}

calling v4l2_rect_map_inside(&r, &boundary) was modifying r to:

r = {
	.left = 0,
	.top = 0,
	.width = 800,
	.height = 600,
}

Which is wrongly outside the boundary rectangle, because:

	v4l2_rect_set_max_size(r, boundary); // r->width = 800, r->height = 600
	...
	if (r->left + r->width > boundary->width) // true
		r->left = boundary->width - r->width; // r->left = 800 - 800
	if (r->top + r->height > boundary->height) // true
		r->top = boundary->height - r->height; // r->height = 600 - 600

Fix this by considering top/left coordinates from boundary.

Fixes: ac49de8c49d7 ("[media] v4l2-rect.h: new header with struct v4l2_rect helper functions")
Signed-off-by: Helen Koike <helen.koike@collabora.com>
Cc: <stable@vger.kernel.org>      # for v4.7 and up
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/media/v4l2-rect.h |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/include/media/v4l2-rect.h
+++ b/include/media/v4l2-rect.h
@@ -63,10 +63,10 @@ static inline void v4l2_rect_map_inside(
 		r->left = boundary->left;
 	if (r->top < boundary->top)
 		r->top = boundary->top;
-	if (r->left + r->width > boundary->width)
-		r->left = boundary->width - r->width;
-	if (r->top + r->height > boundary->height)
-		r->top = boundary->height - r->height;
+	if (r->left + r->width > boundary->left + boundary->width)
+		r->left = boundary->left + boundary->width - r->width;
+	if (r->top + r->height > boundary->top + boundary->height)
+		r->top = boundary->top + boundary->height - r->height;
 }
 
 /**



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 043/195] lib/test_kasan.c: fix memory leak in kmalloc_oob_krealloc_more()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (41 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 042/195] media: v4l2-rect.h: fix v4l2_rect_map_inside() top/left adjustments Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 044/195] irqdomain: Fix a memory leak in irq_domain_push_irq() Greg Kroah-Hartman
                   ` (155 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Gustavo A. R. Silva, Dmitry Vyukov,
	Andrew Morton, Linus Torvalds

From: Gustavo A. R. Silva <gustavo@embeddedor.com>

commit 3e21d9a501bf99aee2e5835d7f34d8c823f115b5 upstream.

In case memory resources for _ptr2_ were allocated, release them before
return.

Notice that in case _ptr1_ happens to be NULL, krealloc() behaves
exactly like kmalloc().

Addresses-Coverity-ID: 1490594 ("Resource leak")
Link: http://lkml.kernel.org/r/20200123160115.GA4202@embeddedor
Fixes: 3f15801cdc23 ("lib: add kasan test module")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 lib/test_kasan.c |    1 +
 1 file changed, 1 insertion(+)

--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -157,6 +157,7 @@ static noinline void __init kmalloc_oob_
 	if (!ptr1 || !ptr2) {
 		pr_err("Allocation failed\n");
 		kfree(ptr1);
+		kfree(ptr2);
 		return;
 	}
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 044/195] irqdomain: Fix a memory leak in irq_domain_push_irq()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (42 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 043/195] lib/test_kasan.c: fix memory leak in kmalloc_oob_krealloc_more() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 045/195] platform/x86: intel_scu_ipc: Fix interrupt support Greg Kroah-Hartman
                   ` (154 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Kevin Hao, Marc Zyngier

From: Kevin Hao <haokexin@gmail.com>

commit 0f394daef89b38d58c91118a2b08b8a1b316703b upstream.

Fix a memory leak reported by kmemleak:
unreferenced object 0xffff000bc6f50e80 (size 128):
  comm "kworker/23:2", pid 201, jiffies 4294894947 (age 942.132s)
  hex dump (first 32 bytes):
    00 00 00 00 41 00 00 00 86 c0 03 00 00 00 00 00  ....A...........
    00 a0 b2 c6 0b 00 ff ff 40 51 fd 10 00 80 ff ff  ........@Q......
  backtrace:
    [<00000000e62d2240>] kmem_cache_alloc_trace+0x1a4/0x320
    [<00000000279143c9>] irq_domain_push_irq+0x7c/0x188
    [<00000000d9f4c154>] thunderx_gpio_probe+0x3ac/0x438
    [<00000000fd09ec22>] pci_device_probe+0xe4/0x198
    [<00000000d43eca75>] really_probe+0xdc/0x320
    [<00000000d3ebab09>] driver_probe_device+0x5c/0xf0
    [<000000005b3ecaa0>] __device_attach_driver+0x88/0xc0
    [<000000004e5915f5>] bus_for_each_drv+0x7c/0xc8
    [<0000000079d4db41>] __device_attach+0xe4/0x140
    [<00000000883bbda9>] device_initial_probe+0x18/0x20
    [<000000003be59ef6>] bus_probe_device+0x98/0xa0
    [<0000000039b03d3f>] deferred_probe_work_func+0x74/0xa8
    [<00000000870934ce>] process_one_work+0x1c8/0x470
    [<00000000e3cce570>] worker_thread+0x1f8/0x428
    [<000000005d64975e>] kthread+0xfc/0x128
    [<00000000f0eaa764>] ret_from_fork+0x10/0x18

Fixes: 495c38d3001f ("irqdomain: Add irq_domain_{push,pop}_irq() functions")
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200120043547.22271-1-haokexin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/irq/irqdomain.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -1421,6 +1421,7 @@ int irq_domain_push_irq(struct irq_domai
 	if (rv) {
 		/* Restore the original irq_data. */
 		*root_irq_data = *child_irq_data;
+		kfree(child_irq_data);
 		goto error;
 	}
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 045/195] platform/x86: intel_scu_ipc: Fix interrupt support
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (43 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 044/195] irqdomain: Fix a memory leak in irq_domain_push_irq() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 046/195] ALSA: hda: Add Clevo W65_67SB the power_save blacklist Greg Kroah-Hartman
                   ` (153 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Mika Westerberg, Andy Shevchenko

From: Mika Westerberg <mika.westerberg@linux.intel.com>

commit e48b72a568bbd641c91dad354138d3c17d03ee6f upstream.

Currently the driver has disabled interrupt support for Tangier but
actually interrupt works just fine if the command is not written twice
in a row. Also we need to ack the interrupt in the handler.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/platform/x86/intel_scu_ipc.c |   21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -69,26 +69,22 @@
 struct intel_scu_ipc_pdata_t {
 	u32 i2c_base;
 	u32 i2c_len;
-	u8 irq_mode;
 };
 
 static const struct intel_scu_ipc_pdata_t intel_scu_ipc_lincroft_pdata = {
 	.i2c_base = 0xff12b000,
 	.i2c_len = 0x10,
-	.irq_mode = 0,
 };
 
 /* Penwell and Cloverview */
 static const struct intel_scu_ipc_pdata_t intel_scu_ipc_penwell_pdata = {
 	.i2c_base = 0xff12b000,
 	.i2c_len = 0x10,
-	.irq_mode = 1,
 };
 
 static const struct intel_scu_ipc_pdata_t intel_scu_ipc_tangier_pdata = {
 	.i2c_base  = 0xff00d000,
 	.i2c_len = 0x10,
-	.irq_mode = 0,
 };
 
 struct intel_scu_ipc_dev {
@@ -101,6 +97,9 @@ struct intel_scu_ipc_dev {
 
 static struct intel_scu_ipc_dev  ipcdev; /* Only one for now */
 
+#define IPC_STATUS		0x04
+#define IPC_STATUS_IRQ		BIT(2)
+
 /*
  * IPC Read Buffer (Read Only):
  * 16 byte buffer for receiving data from SCU, if IPC command
@@ -122,11 +121,8 @@ static DEFINE_MUTEX(ipclock); /* lock us
  */
 static inline void ipc_command(struct intel_scu_ipc_dev *scu, u32 cmd)
 {
-	if (scu->irq_mode) {
-		reinit_completion(&scu->cmd_complete);
-		writel(cmd | IPC_IOC, scu->ipc_base);
-	}
-	writel(cmd, scu->ipc_base);
+	reinit_completion(&scu->cmd_complete);
+	writel(cmd | IPC_IOC, scu->ipc_base);
 }
 
 /*
@@ -612,9 +608,10 @@ EXPORT_SYMBOL(intel_scu_ipc_i2c_cntrl);
 static irqreturn_t ioc(int irq, void *dev_id)
 {
 	struct intel_scu_ipc_dev *scu = dev_id;
+	int status = ipc_read_status(scu);
 
-	if (scu->irq_mode)
-		complete(&scu->cmd_complete);
+	writel(status | IPC_STATUS_IRQ, scu->ipc_base + IPC_STATUS);
+	complete(&scu->cmd_complete);
 
 	return IRQ_HANDLED;
 }
@@ -640,8 +637,6 @@ static int ipc_probe(struct pci_dev *pde
 	if (!pdata)
 		return -ENODEV;
 
-	scu->irq_mode = pdata->irq_mode;
-
 	err = pcim_enable_device(pdev);
 	if (err)
 		return err;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 046/195] ALSA: hda: Add Clevo W65_67SB the power_save blacklist
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (44 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 045/195] platform/x86: intel_scu_ipc: Fix interrupt support Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 047/195] KVM: arm64: Correct PSTATE on exception entry Greg Kroah-Hartman
                   ` (152 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Hans de Goede, Takashi Iwai

From: Hans de Goede <hdegoede@redhat.com>

commit d8feb6080bb0c9f4d799a423d9453048fdd06990 upstream.

Using HDA power-saving on the Clevo W65_67SB causes the first 0.5
seconds of audio to be missing every time audio starts playing.

This commit adds the Clevo W65_67SB the power_save blacklist to avoid
this issue.

Cc: stable@vger.kernel.org
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1525104
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200125181021.70446-1-hdegoede@redhat.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/pci/hda/hda_intel.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2324,6 +2324,8 @@ static struct snd_pci_quirk power_save_b
 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1581607 */
 	SND_PCI_QUIRK(0x1558, 0x3501, "Clevo W35xSS_370SS", 0),
 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
+	SND_PCI_QUIRK(0x1558, 0x6504, "Clevo W65_67SB", 0),
+	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
 	SND_PCI_QUIRK(0x1028, 0x0497, "Dell Precision T3600", 0),
 	/* https://bugzilla.redhat.com/show_bug.cgi?id=1525104 */
 	/* Note the P55A-UD3 and Z87-D3HP share the subsys id for the HDA dev */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 047/195] KVM: arm64: Correct PSTATE on exception entry
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (45 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 046/195] ALSA: hda: Add Clevo W65_67SB the power_save blacklist Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 048/195] KVM: arm/arm64: Correct CPSR " Greg Kroah-Hartman
                   ` (151 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Mark Rutland, Marc Zyngier, Alexandru Elisei

From: Mark Rutland <mark.rutland@arm.com>

commit a425372e733177eb0779748956bc16c85167af48 upstream.

When KVM injects an exception into a guest, it generates the PSTATE
value from scratch, configuring PSTATE.{M[4:0],DAIF}, and setting all
other bits to zero.

This isn't correct, as the architecture specifies that some PSTATE bits
are (conditionally) cleared or set upon an exception, and others are
unchanged from the original context.

This patch adds logic to match the architectural behaviour. To make this
simple to follow/audit/extend, documentation references are provided,
and bits are configured in order of their layout in SPSR_EL2. This
layout can be seen in the diagram on ARM DDI 0487E.a page C5-429.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200108134324.46500-2-mark.rutland@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm64/include/uapi/asm/ptrace.h |    1 
 arch/arm64/kvm/inject_fault.c        |   70 ++++++++++++++++++++++++++++++++---
 2 files changed, 66 insertions(+), 5 deletions(-)

--- a/arch/arm64/include/uapi/asm/ptrace.h
+++ b/arch/arm64/include/uapi/asm/ptrace.h
@@ -49,6 +49,7 @@
 #define PSR_SSBS_BIT	0x00001000
 #define PSR_PAN_BIT	0x00400000
 #define PSR_UAO_BIT	0x00800000
+#define PSR_DIT_BIT	0x01000000
 #define PSR_V_BIT	0x10000000
 #define PSR_C_BIT	0x20000000
 #define PSR_Z_BIT	0x40000000
--- a/arch/arm64/kvm/inject_fault.c
+++ b/arch/arm64/kvm/inject_fault.c
@@ -25,9 +25,6 @@
 #include <asm/kvm_emulate.h>
 #include <asm/esr.h>
 
-#define PSTATE_FAULT_BITS_64 	(PSR_MODE_EL1h | PSR_A_BIT | PSR_F_BIT | \
-				 PSR_I_BIT | PSR_D_BIT)
-
 #define CURRENT_EL_SP_EL0_VECTOR	0x0
 #define CURRENT_EL_SP_ELx_VECTOR	0x200
 #define LOWER_EL_AArch64_VECTOR		0x400
@@ -61,6 +58,69 @@ static u64 get_except_vector(struct kvm_
 	return vcpu_read_sys_reg(vcpu, VBAR_EL1) + exc_offset + type;
 }
 
+/*
+ * When an exception is taken, most PSTATE fields are left unchanged in the
+ * handler. However, some are explicitly overridden (e.g. M[4:0]). Luckily all
+ * of the inherited bits have the same position in the AArch64/AArch32 SPSR_ELx
+ * layouts, so we don't need to shuffle these for exceptions from AArch32 EL0.
+ *
+ * For the SPSR_ELx layout for AArch64, see ARM DDI 0487E.a page C5-429.
+ * For the SPSR_ELx layout for AArch32, see ARM DDI 0487E.a page C5-426.
+ *
+ * Here we manipulate the fields in order of the AArch64 SPSR_ELx layout, from
+ * MSB to LSB.
+ */
+static unsigned long get_except64_pstate(struct kvm_vcpu *vcpu)
+{
+	unsigned long sctlr = vcpu_read_sys_reg(vcpu, SCTLR_EL1);
+	unsigned long old, new;
+
+	old = *vcpu_cpsr(vcpu);
+	new = 0;
+
+	new |= (old & PSR_N_BIT);
+	new |= (old & PSR_Z_BIT);
+	new |= (old & PSR_C_BIT);
+	new |= (old & PSR_V_BIT);
+
+	// TODO: TCO (if/when ARMv8.5-MemTag is exposed to guests)
+
+	new |= (old & PSR_DIT_BIT);
+
+	// PSTATE.UAO is set to zero upon any exception to AArch64
+	// See ARM DDI 0487E.a, page D5-2579.
+
+	// PSTATE.PAN is unchanged unless SCTLR_ELx.SPAN == 0b0
+	// SCTLR_ELx.SPAN is RES1 when ARMv8.1-PAN is not implemented
+	// See ARM DDI 0487E.a, page D5-2578.
+	new |= (old & PSR_PAN_BIT);
+	if (!(sctlr & SCTLR_EL1_SPAN))
+		new |= PSR_PAN_BIT;
+
+	// PSTATE.SS is set to zero upon any exception to AArch64
+	// See ARM DDI 0487E.a, page D2-2452.
+
+	// PSTATE.IL is set to zero upon any exception to AArch64
+	// See ARM DDI 0487E.a, page D1-2306.
+
+	// PSTATE.SSBS is set to SCTLR_ELx.DSSBS upon any exception to AArch64
+	// See ARM DDI 0487E.a, page D13-3258
+	if (sctlr & SCTLR_ELx_DSSBS)
+		new |= PSR_SSBS_BIT;
+
+	// PSTATE.BTYPE is set to zero upon any exception to AArch64
+	// See ARM DDI 0487E.a, pages D1-2293 to D1-2294.
+
+	new |= PSR_D_BIT;
+	new |= PSR_A_BIT;
+	new |= PSR_I_BIT;
+	new |= PSR_F_BIT;
+
+	new |= PSR_MODE_EL1h;
+
+	return new;
+}
+
 static void inject_abt64(struct kvm_vcpu *vcpu, bool is_iabt, unsigned long addr)
 {
 	unsigned long cpsr = *vcpu_cpsr(vcpu);
@@ -70,7 +130,7 @@ static void inject_abt64(struct kvm_vcpu
 	vcpu_write_elr_el1(vcpu, *vcpu_pc(vcpu));
 	*vcpu_pc(vcpu) = get_except_vector(vcpu, except_type_sync);
 
-	*vcpu_cpsr(vcpu) = PSTATE_FAULT_BITS_64;
+	*vcpu_cpsr(vcpu) = get_except64_pstate(vcpu);
 	vcpu_write_spsr(vcpu, cpsr);
 
 	vcpu_write_sys_reg(vcpu, addr, FAR_EL1);
@@ -105,7 +165,7 @@ static void inject_undef64(struct kvm_vc
 	vcpu_write_elr_el1(vcpu, *vcpu_pc(vcpu));
 	*vcpu_pc(vcpu) = get_except_vector(vcpu, except_type_sync);
 
-	*vcpu_cpsr(vcpu) = PSTATE_FAULT_BITS_64;
+	*vcpu_cpsr(vcpu) = get_except64_pstate(vcpu);
 	vcpu_write_spsr(vcpu, cpsr);
 
 	/*



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 048/195] KVM: arm/arm64: Correct CPSR on exception entry
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (46 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 047/195] KVM: arm64: Correct PSTATE on exception entry Greg Kroah-Hartman
@ 2020-02-10 12:31 ` " Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 049/195] KVM: arm/arm64: Correct AArch32 SPSR " Greg Kroah-Hartman
                   ` (150 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Mark Rutland, Marc Zyngier, Alexandru Elisei

From: Mark Rutland <mark.rutland@arm.com>

commit 3c2483f15499b877ccb53250d88addb8c91da147 upstream.

When KVM injects an exception into a guest, it generates the CPSR value
from scratch, configuring CPSR.{M,A,I,T,E}, and setting all other
bits to zero.

This isn't correct, as the architecture specifies that some CPSR bits
are (conditionally) cleared or set upon an exception, and others are
unchanged from the original context.

This patch adds logic to match the architectural behaviour. To make this
simple to follow/audit/extend, documentation references are provided,
and bits are configured in order of their layout in SPSR_EL2. This
layout can be seen in the diagram on ARM DDI 0487E.a page C5-426.

Note that this code is used by both arm and arm64, and is intended to
fuction with the SPSR_EL2 and SPSR_HYP layouts.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200108134324.46500-3-mark.rutland@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/include/asm/kvm_emulate.h |   12 ++++
 arch/arm64/include/asm/ptrace.h    |    1 
 virt/kvm/arm/aarch32.c             |  111 +++++++++++++++++++++++++++++++++----
 3 files changed, 114 insertions(+), 10 deletions(-)

--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -26,13 +26,25 @@
 #include <asm/cputype.h>
 
 /* arm64 compatibility macros */
+#define PSR_AA32_MODE_FIQ	FIQ_MODE
+#define PSR_AA32_MODE_SVC	SVC_MODE
 #define PSR_AA32_MODE_ABT	ABT_MODE
 #define PSR_AA32_MODE_UND	UND_MODE
 #define PSR_AA32_T_BIT		PSR_T_BIT
+#define PSR_AA32_F_BIT		PSR_F_BIT
 #define PSR_AA32_I_BIT		PSR_I_BIT
 #define PSR_AA32_A_BIT		PSR_A_BIT
 #define PSR_AA32_E_BIT		PSR_E_BIT
 #define PSR_AA32_IT_MASK	PSR_IT_MASK
+#define PSR_AA32_GE_MASK	0x000f0000
+#define PSR_AA32_DIT_BIT	0x00200000
+#define PSR_AA32_PAN_BIT	0x00400000
+#define PSR_AA32_SSBS_BIT	0x00800000
+#define PSR_AA32_Q_BIT		PSR_Q_BIT
+#define PSR_AA32_V_BIT		PSR_V_BIT
+#define PSR_AA32_C_BIT		PSR_C_BIT
+#define PSR_AA32_Z_BIT		PSR_Z_BIT
+#define PSR_AA32_N_BIT		PSR_N_BIT
 
 unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
 
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -50,6 +50,7 @@
 #define PSR_AA32_I_BIT		0x00000080
 #define PSR_AA32_A_BIT		0x00000100
 #define PSR_AA32_E_BIT		0x00000200
+#define PSR_AA32_PAN_BIT	0x00400000
 #define PSR_AA32_SSBS_BIT	0x00800000
 #define PSR_AA32_DIT_BIT	0x01000000
 #define PSR_AA32_Q_BIT		0x08000000
--- a/virt/kvm/arm/aarch32.c
+++ b/virt/kvm/arm/aarch32.c
@@ -21,6 +21,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <linux/bits.h>
 #include <linux/kvm_host.h>
 #include <asm/kvm_emulate.h>
 #include <asm/kvm_hyp.h>
@@ -39,22 +40,112 @@ static const u8 return_offsets[8][2] = {
 	[7] = { 4, 4 },		/* FIQ, unused */
 };
 
+/*
+ * When an exception is taken, most CPSR fields are left unchanged in the
+ * handler. However, some are explicitly overridden (e.g. M[4:0]).
+ *
+ * The SPSR/SPSR_ELx layouts differ, and the below is intended to work with
+ * either format. Note: SPSR.J bit doesn't exist in SPSR_ELx, but this bit was
+ * obsoleted by the ARMv7 virtualization extensions and is RES0.
+ *
+ * For the SPSR layout seen from AArch32, see:
+ * - ARM DDI 0406C.d, page B1-1148
+ * - ARM DDI 0487E.a, page G8-6264
+ *
+ * For the SPSR_ELx layout for AArch32 seen from AArch64, see:
+ * - ARM DDI 0487E.a, page C5-426
+ *
+ * Here we manipulate the fields in order of the AArch32 SPSR_ELx layout, from
+ * MSB to LSB.
+ */
+static unsigned long get_except32_cpsr(struct kvm_vcpu *vcpu, u32 mode)
+{
+	u32 sctlr = vcpu_cp15(vcpu, c1_SCTLR);
+	unsigned long old, new;
+
+	old = *vcpu_cpsr(vcpu);
+	new = 0;
+
+	new |= (old & PSR_AA32_N_BIT);
+	new |= (old & PSR_AA32_Z_BIT);
+	new |= (old & PSR_AA32_C_BIT);
+	new |= (old & PSR_AA32_V_BIT);
+	new |= (old & PSR_AA32_Q_BIT);
+
+	// CPSR.IT[7:0] are set to zero upon any exception
+	// See ARM DDI 0487E.a, section G1.12.3
+	// See ARM DDI 0406C.d, section B1.8.3
+
+	new |= (old & PSR_AA32_DIT_BIT);
+
+	// CPSR.SSBS is set to SCTLR.DSSBS upon any exception
+	// See ARM DDI 0487E.a, page G8-6244
+	if (sctlr & BIT(31))
+		new |= PSR_AA32_SSBS_BIT;
+
+	// CPSR.PAN is unchanged unless SCTLR.SPAN == 0b0
+	// SCTLR.SPAN is RES1 when ARMv8.1-PAN is not implemented
+	// See ARM DDI 0487E.a, page G8-6246
+	new |= (old & PSR_AA32_PAN_BIT);
+	if (!(sctlr & BIT(23)))
+		new |= PSR_AA32_PAN_BIT;
+
+	// SS does not exist in AArch32, so ignore
+
+	// CPSR.IL is set to zero upon any exception
+	// See ARM DDI 0487E.a, page G1-5527
+
+	new |= (old & PSR_AA32_GE_MASK);
+
+	// CPSR.IT[7:0] are set to zero upon any exception
+	// See prior comment above
+
+	// CPSR.E is set to SCTLR.EE upon any exception
+	// See ARM DDI 0487E.a, page G8-6245
+	// See ARM DDI 0406C.d, page B4-1701
+	if (sctlr & BIT(25))
+		new |= PSR_AA32_E_BIT;
+
+	// CPSR.A is unchanged upon an exception to Undefined, Supervisor
+	// CPSR.A is set upon an exception to other modes
+	// See ARM DDI 0487E.a, pages G1-5515 to G1-5516
+	// See ARM DDI 0406C.d, page B1-1182
+	new |= (old & PSR_AA32_A_BIT);
+	if (mode != PSR_AA32_MODE_UND && mode != PSR_AA32_MODE_SVC)
+		new |= PSR_AA32_A_BIT;
+
+	// CPSR.I is set upon any exception
+	// See ARM DDI 0487E.a, pages G1-5515 to G1-5516
+	// See ARM DDI 0406C.d, page B1-1182
+	new |= PSR_AA32_I_BIT;
+
+	// CPSR.F is set upon an exception to FIQ
+	// CPSR.F is unchanged upon an exception to other modes
+	// See ARM DDI 0487E.a, pages G1-5515 to G1-5516
+	// See ARM DDI 0406C.d, page B1-1182
+	new |= (old & PSR_AA32_F_BIT);
+	if (mode == PSR_AA32_MODE_FIQ)
+		new |= PSR_AA32_F_BIT;
+
+	// CPSR.T is set to SCTLR.TE upon any exception
+	// See ARM DDI 0487E.a, page G8-5514
+	// See ARM DDI 0406C.d, page B1-1181
+	if (sctlr & BIT(30))
+		new |= PSR_AA32_T_BIT;
+
+	new |= mode;
+
+	return new;
+}
+
 static void prepare_fault32(struct kvm_vcpu *vcpu, u32 mode, u32 vect_offset)
 {
-	unsigned long cpsr;
 	unsigned long new_spsr_value = *vcpu_cpsr(vcpu);
 	bool is_thumb = (new_spsr_value & PSR_AA32_T_BIT);
 	u32 return_offset = return_offsets[vect_offset >> 2][is_thumb];
 	u32 sctlr = vcpu_cp15(vcpu, c1_SCTLR);
 
-	cpsr = mode | PSR_AA32_I_BIT;
-
-	if (sctlr & (1 << 30))
-		cpsr |= PSR_AA32_T_BIT;
-	if (sctlr & (1 << 25))
-		cpsr |= PSR_AA32_E_BIT;
-
-	*vcpu_cpsr(vcpu) = cpsr;
+	*vcpu_cpsr(vcpu) = get_except32_cpsr(vcpu, mode);
 
 	/* Note: These now point to the banked copies */
 	vcpu_write_spsr(vcpu, new_spsr_value);
@@ -95,7 +186,7 @@ static void inject_abt32(struct kvm_vcpu
 		fsr = &vcpu_cp15(vcpu, c5_DFSR);
 	}
 
-	prepare_fault32(vcpu, PSR_AA32_MODE_ABT | PSR_AA32_A_BIT, vect_offset);
+	prepare_fault32(vcpu, PSR_AA32_MODE_ABT, vect_offset);
 
 	*far = addr;
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 049/195] KVM: arm/arm64: Correct AArch32 SPSR on exception entry
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (47 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 048/195] KVM: arm/arm64: Correct CPSR " Greg Kroah-Hartman
@ 2020-02-10 12:31 ` " Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 050/195] KVM: arm64: Only sign-extend MMIO up to register width Greg Kroah-Hartman
                   ` (149 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Mark Rutland, Marc Zyngier, Alexandru Elisei

From: Mark Rutland <mark.rutland@arm.com>

commit 1cfbb484de158e378e8971ac40f3082e53ecca55 upstream.

Confusingly, there are three SPSR layouts that a kernel may need to deal
with:

(1) An AArch64 SPSR_ELx view of an AArch64 pstate
(2) An AArch64 SPSR_ELx view of an AArch32 pstate
(3) An AArch32 SPSR_* view of an AArch32 pstate

When the KVM AArch32 support code deals with SPSR_{EL2,HYP}, it's either
dealing with #2 or #3 consistently. On arm64 the PSR_AA32_* definitions
match the AArch64 SPSR_ELx view, and on arm the PSR_AA32_* definitions
match the AArch32 SPSR_* view.

However, when we inject an exception into an AArch32 guest, we have to
synthesize the AArch32 SPSR_* that the guest will see. Thus, an AArch64
host needs to synthesize layout #3 from layout #2.

This patch adds a new host_spsr_to_spsr32() helper for this, and makes
use of it in the KVM AArch32 support code. For arm64 we need to shuffle
the DIT bit around, and remove the SS bit, while for arm we can use the
value as-is.

I've open-coded the bit manipulation for now to avoid having to rework
the existing PSR_* definitions into PSR64_AA32_* and PSR32_AA32_*
definitions. I hope to perform a more thorough refactoring in future so
that we can handle pstate view manipulation more consistently across the
kernel tree.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200108134324.46500-4-mark.rutland@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/include/asm/kvm_emulate.h   |    5 +++++
 arch/arm64/include/asm/kvm_emulate.h |   32 ++++++++++++++++++++++++++++++++
 virt/kvm/arm/aarch32.c               |    6 +++---
 3 files changed, 40 insertions(+), 3 deletions(-)

--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -65,6 +65,11 @@ static inline void vcpu_write_spsr(struc
 	*__vcpu_spsr(vcpu) = v;
 }
 
+static inline unsigned long host_spsr_to_spsr32(unsigned long spsr)
+{
+	return spsr;
+}
+
 static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
 					 u8 reg_num)
 {
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -202,6 +202,38 @@ static inline void vcpu_write_spsr(struc
 		vcpu_gp_regs(vcpu)->spsr[KVM_SPSR_EL1] = v;
 }
 
+/*
+ * The layout of SPSR for an AArch32 state is different when observed from an
+ * AArch64 SPSR_ELx or an AArch32 SPSR_*. This function generates the AArch32
+ * view given an AArch64 view.
+ *
+ * In ARM DDI 0487E.a see:
+ *
+ * - The AArch64 view (SPSR_EL2) in section C5.2.18, page C5-426
+ * - The AArch32 view (SPSR_abt) in section G8.2.126, page G8-6256
+ * - The AArch32 view (SPSR_und) in section G8.2.132, page G8-6280
+ *
+ * Which show the following differences:
+ *
+ * | Bit | AA64 | AA32 | Notes                       |
+ * +-----+------+------+-----------------------------|
+ * | 24  | DIT  | J    | J is RES0 in ARMv8          |
+ * | 21  | SS   | DIT  | SS doesn't exist in AArch32 |
+ *
+ * ... and all other bits are (currently) common.
+ */
+static inline unsigned long host_spsr_to_spsr32(unsigned long spsr)
+{
+	const unsigned long overlap = BIT(24) | BIT(21);
+	unsigned long dit = !!(spsr & PSR_AA32_DIT_BIT);
+
+	spsr &= ~overlap;
+
+	spsr |= dit << 21;
+
+	return spsr;
+}
+
 static inline bool vcpu_mode_priv(const struct kvm_vcpu *vcpu)
 {
 	u32 mode;
--- a/virt/kvm/arm/aarch32.c
+++ b/virt/kvm/arm/aarch32.c
@@ -140,15 +140,15 @@ static unsigned long get_except32_cpsr(s
 
 static void prepare_fault32(struct kvm_vcpu *vcpu, u32 mode, u32 vect_offset)
 {
-	unsigned long new_spsr_value = *vcpu_cpsr(vcpu);
-	bool is_thumb = (new_spsr_value & PSR_AA32_T_BIT);
+	unsigned long spsr = *vcpu_cpsr(vcpu);
+	bool is_thumb = (spsr & PSR_AA32_T_BIT);
 	u32 return_offset = return_offsets[vect_offset >> 2][is_thumb];
 	u32 sctlr = vcpu_cp15(vcpu, c1_SCTLR);
 
 	*vcpu_cpsr(vcpu) = get_except32_cpsr(vcpu, mode);
 
 	/* Note: These now point to the banked copies */
-	vcpu_write_spsr(vcpu, new_spsr_value);
+	vcpu_write_spsr(vcpu, host_spsr_to_spsr32(spsr));
 	*vcpu_reg32(vcpu, 14) = *vcpu_pc(vcpu) + return_offset;
 
 	/* Branch to exception vector */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 050/195] KVM: arm64: Only sign-extend MMIO up to register width
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (48 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 049/195] KVM: arm/arm64: Correct AArch32 SPSR " Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 051/195] MIPS: fix indentation of the RELOCS message Greg Kroah-Hartman
                   ` (148 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Christoffer Dall, Marc Zyngier

From: Christoffer Dall <christoffer.dall@arm.com>

commit b6ae256afd32f96bec0117175b329d0dd617655e upstream.

On AArch64 you can do a sign-extended load to either a 32-bit or 64-bit
register, and we should only sign extend the register up to the width of
the register as specified in the operation (by using the 32-bit Wn or
64-bit Xn register specifier).

As it turns out, the architecture provides this decoding information in
the SF ("Sixty-Four" -- how cute...) bit.

Let's take advantage of this with the usual 32-bit/64-bit header file
dance and do the right thing on AArch64 hosts.

Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191212195055.5541-1-christoffer.dall@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/include/asm/kvm_emulate.h   |    5 +++++
 arch/arm/include/asm/kvm_mmio.h      |    2 ++
 arch/arm64/include/asm/kvm_emulate.h |    5 +++++
 arch/arm64/include/asm/kvm_mmio.h    |    6 ++----
 virt/kvm/arm/mmio.c                  |    6 ++++++
 5 files changed, 20 insertions(+), 4 deletions(-)

--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -206,6 +206,11 @@ static inline bool kvm_vcpu_dabt_issext(
 	return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
 }
 
+static inline bool kvm_vcpu_dabt_issf(const struct kvm_vcpu *vcpu)
+{
+	return false;
+}
+
 static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
 {
 	return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
--- a/arch/arm/include/asm/kvm_mmio.h
+++ b/arch/arm/include/asm/kvm_mmio.h
@@ -26,6 +26,8 @@
 struct kvm_decode {
 	unsigned long rt;
 	bool sign_extend;
+	/* Not used on 32-bit arm */
+	bool sixty_four;
 };
 
 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data);
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -293,6 +293,11 @@ static inline bool kvm_vcpu_dabt_issext(
 	return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SSE);
 }
 
+static inline bool kvm_vcpu_dabt_issf(const struct kvm_vcpu *vcpu)
+{
+	return !!(kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SF);
+}
+
 static inline int kvm_vcpu_dabt_get_rd(const struct kvm_vcpu *vcpu)
 {
 	return (kvm_vcpu_get_hsr(vcpu) & ESR_ELx_SRT_MASK) >> ESR_ELx_SRT_SHIFT;
--- a/arch/arm64/include/asm/kvm_mmio.h
+++ b/arch/arm64/include/asm/kvm_mmio.h
@@ -21,13 +21,11 @@
 #include <linux/kvm_host.h>
 #include <asm/kvm_arm.h>
 
-/*
- * This is annoying. The mmio code requires this, even if we don't
- * need any decoding. To be fixed.
- */
 struct kvm_decode {
 	unsigned long rt;
 	bool sign_extend;
+	/* Witdth of the register accessed by the faulting instruction is 64-bits */
+	bool sixty_four;
 };
 
 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data);
--- a/virt/kvm/arm/mmio.c
+++ b/virt/kvm/arm/mmio.c
@@ -117,6 +117,9 @@ int kvm_handle_mmio_return(struct kvm_vc
 			data = (data ^ mask) - mask;
 		}
 
+		if (!vcpu->arch.mmio_decode.sixty_four)
+			data = data & 0xffffffff;
+
 		trace_kvm_mmio(KVM_TRACE_MMIO_READ, len, run->mmio.phys_addr,
 			       &data);
 		data = vcpu_data_host_to_guest(vcpu, data, len);
@@ -137,6 +140,7 @@ static int decode_hsr(struct kvm_vcpu *v
 	unsigned long rt;
 	int access_size;
 	bool sign_extend;
+	bool sixty_four;
 
 	if (kvm_vcpu_dabt_iss1tw(vcpu)) {
 		/* page table accesses IO mem: tell guest to fix its TTBR */
@@ -150,11 +154,13 @@ static int decode_hsr(struct kvm_vcpu *v
 
 	*is_write = kvm_vcpu_dabt_iswrite(vcpu);
 	sign_extend = kvm_vcpu_dabt_issext(vcpu);
+	sixty_four = kvm_vcpu_dabt_issf(vcpu);
 	rt = kvm_vcpu_dabt_get_rd(vcpu);
 
 	*len = access_size;
 	vcpu->arch.mmio_decode.sign_extend = sign_extend;
 	vcpu->arch.mmio_decode.rt = rt;
+	vcpu->arch.mmio_decode.sixty_four = sixty_four;
 
 	return 0;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 051/195] MIPS: fix indentation of the RELOCS message
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (49 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 050/195] KVM: arm64: Only sign-extend MMIO up to register width Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 052/195] MIPS: boot: fix typo in vmlinux.lzma.its target Greg Kroah-Hartman
                   ` (147 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Alexander Lobakin, Paul Burton,
	Ralf Baechle, James Hogan, Masahiro Yamada, Rob Herring,
	linux-mips

From: Alexander Lobakin <alobakin@dlink.ru>

commit a53998802e178451701d59d38e36f551422977ba upstream.

quiet_cmd_relocs lacks a whitespace which results in:

  LD      vmlinux
  SORTEX  vmlinux
  SYSMAP  System.map
  RELOCS vmlinux
  Building modules, stage 2.
  MODPOST 64 modules

After this patch:

  LD      vmlinux
  SORTEX  vmlinux
  SYSMAP  System.map
  RELOCS  vmlinux
  Building modules, stage 2.
  MODPOST 64 modules

Typo is present in kernel tree since the introduction of relocatable
kernel support in commit e818fac595ab ("MIPS: Generate relocation table
when CONFIG_RELOCATABLE"), but the relocation scripts were moved to
Makefile.postlink later with commit 44079d3509ae ("MIPS: Use
Makefile.postlink to insert relocations into vmlinux").

Fixes: 44079d3509ae ("MIPS: Use Makefile.postlink to insert relocations into vmlinux")
Cc: <stable@vger.kernel.org> # v4.11+
Signed-off-by: Alexander Lobakin <alobakin@dlink.ru>
[paulburton@kernel.org: Fixup commit references in commit message.]
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Rob Herring <robh@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/mips/Makefile.postlink |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/mips/Makefile.postlink
+++ b/arch/mips/Makefile.postlink
@@ -12,7 +12,7 @@ __archpost:
 include scripts/Kbuild.include
 
 CMD_RELOCS = arch/mips/boot/tools/relocs
-quiet_cmd_relocs = RELOCS $@
+quiet_cmd_relocs = RELOCS  $@
       cmd_relocs = $(CMD_RELOCS) $@
 
 # `@true` prevents complaint when there is nothing to be done



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 052/195] MIPS: boot: fix typo in vmlinux.lzma.its target
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (50 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 051/195] MIPS: fix indentation of the RELOCS message Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 053/195] s390/mm: fix dynamic pagetable upgrade for hugetlbfs Greg Kroah-Hartman
                   ` (146 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Alexander Lobakin, Paul Burton,
	Ralf Baechle, James Hogan, Masahiro Yamada, Rob Herring,
	linux-mips

From: Alexander Lobakin <alobakin@dlink.ru>

commit 16202c09577f3d0c533274c0410b7de05fb0d458 upstream.

Commit 92b34a976348 ("MIPS: boot: add missing targets for vmlinux.*.its")
fixed constant rebuild of *.its files on every make invocation, but due
to typo ("lzmo") it made no sense for vmlinux.lzma.its.

Fixes: 92b34a976348 ("MIPS: boot: add missing targets for vmlinux.*.its")
Cc: <stable@vger.kernel.org> # v4.19+
Signed-off-by: Alexander Lobakin <alobakin@dlink.ru>
[paulburton@kernel.org: s/invokation/invocation/]
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Rob Herring <robh@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/mips/boot/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/mips/boot/Makefile
+++ b/arch/mips/boot/Makefile
@@ -123,7 +123,7 @@ $(obj)/vmlinux.its.S: $(addprefix $(srct
 targets += vmlinux.its
 targets += vmlinux.gz.its
 targets += vmlinux.bz2.its
-targets += vmlinux.lzmo.its
+targets += vmlinux.lzma.its
 targets += vmlinux.lzo.its
 
 quiet_cmd_cpp_its_S = ITS     $@



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 053/195] s390/mm: fix dynamic pagetable upgrade for hugetlbfs
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (51 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 052/195] MIPS: boot: fix typo in vmlinux.lzma.its target Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 054/195] powerpc/xmon: dont access ASDR in VMs Greg Kroah-Hartman
                   ` (145 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Gerald Schaefer, Vasily Gorbik

From: Gerald Schaefer <gerald.schaefer@de.ibm.com>

commit 5f490a520bcb393389a4d44bec90afcb332eb112 upstream.

Commit ee71d16d22bb ("s390/mm: make TASK_SIZE independent from the number
of page table levels") changed the logic of TASK_SIZE and also removed the
arch_mmap_check() implementation for s390. This combination has a subtle
effect on how get_unmapped_area() for hugetlbfs pages works. It is now
possible that a user process establishes a hugetlbfs mapping at an address
above 4 TB, without triggering a dynamic pagetable upgrade from 3 to 4
levels.

This is because hugetlbfs mappings will not use mm->get_unmapped_area, but
rather file->f_op->get_unmapped_area, which currently is the generic
implementation of hugetlb_get_unmapped_area() that does not know about s390
dynamic pagetable upgrades, but with the new definition of TASK_SIZE, it
will now allow mappings above 4 TB.

Subsequent access to such a mapped address above 4 TB will result in a page
fault loop, because the CPU cannot translate such a large address with 3
pagetable levels. The fault handler will try to map in a hugepage at the
address, but due to the folded pagetable logic it will end up with creating
entries in the 3 level pagetable, possibly overwriting existing mappings,
and then it all repeats when the access is retried.

Apart from the page fault loop, this can have various nasty effects, e.g.
kernel panic from one of the BUG_ON() checks in memory management code,
or even data loss if an existing mapping gets overwritten.

Fix this by implementing HAVE_ARCH_HUGETLB_UNMAPPED_AREA support for s390,
providing an s390 version for hugetlb_get_unmapped_area() with pagetable
upgrade support similar to arch_get_unmapped_area(), which will then be
used instead of the generic version.

Fixes: ee71d16d22bb ("s390/mm: make TASK_SIZE independent from the number of page table levels")
Cc: <stable@vger.kernel.org> # 4.12+
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/s390/include/asm/page.h |    2 
 arch/s390/mm/hugetlbpage.c   |  100 ++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 101 insertions(+), 1 deletion(-)

--- a/arch/s390/include/asm/page.h
+++ b/arch/s390/include/asm/page.h
@@ -33,6 +33,8 @@
 #define ARCH_HAS_PREPARE_HUGEPAGE
 #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
 
+#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
+
 #include <asm/setup.h>
 #ifndef __ASSEMBLY__
 
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -2,7 +2,7 @@
 /*
  *  IBM System z Huge TLB Page Support for Kernel.
  *
- *    Copyright IBM Corp. 2007,2016
+ *    Copyright IBM Corp. 2007,2020
  *    Author(s): Gerald Schaefer <gerald.schaefer@de.ibm.com>
  */
 
@@ -11,6 +11,9 @@
 
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
+#include <linux/mman.h>
+#include <linux/sched/mm.h>
+#include <linux/security.h>
 
 /*
  * If the bit selected by single-bit bitmask "a" is set within "x", move
@@ -267,3 +270,98 @@ static __init int setup_hugepagesz(char
 	return 1;
 }
 __setup("hugepagesz=", setup_hugepagesz);
+
+static unsigned long hugetlb_get_unmapped_area_bottomup(struct file *file,
+		unsigned long addr, unsigned long len,
+		unsigned long pgoff, unsigned long flags)
+{
+	struct hstate *h = hstate_file(file);
+	struct vm_unmapped_area_info info;
+
+	info.flags = 0;
+	info.length = len;
+	info.low_limit = current->mm->mmap_base;
+	info.high_limit = TASK_SIZE;
+	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
+	info.align_offset = 0;
+	return vm_unmapped_area(&info);
+}
+
+static unsigned long hugetlb_get_unmapped_area_topdown(struct file *file,
+		unsigned long addr0, unsigned long len,
+		unsigned long pgoff, unsigned long flags)
+{
+	struct hstate *h = hstate_file(file);
+	struct vm_unmapped_area_info info;
+	unsigned long addr;
+
+	info.flags = VM_UNMAPPED_AREA_TOPDOWN;
+	info.length = len;
+	info.low_limit = max(PAGE_SIZE, mmap_min_addr);
+	info.high_limit = current->mm->mmap_base;
+	info.align_mask = PAGE_MASK & ~huge_page_mask(h);
+	info.align_offset = 0;
+	addr = vm_unmapped_area(&info);
+
+	/*
+	 * A failed mmap() very likely causes application failure,
+	 * so fall back to the bottom-up function here. This scenario
+	 * can happen with large stack limits and large mmap()
+	 * allocations.
+	 */
+	if (addr & ~PAGE_MASK) {
+		VM_BUG_ON(addr != -ENOMEM);
+		info.flags = 0;
+		info.low_limit = TASK_UNMAPPED_BASE;
+		info.high_limit = TASK_SIZE;
+		addr = vm_unmapped_area(&info);
+	}
+
+	return addr;
+}
+
+unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
+		unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+	struct hstate *h = hstate_file(file);
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct *vma;
+	int rc;
+
+	if (len & ~huge_page_mask(h))
+		return -EINVAL;
+	if (len > TASK_SIZE - mmap_min_addr)
+		return -ENOMEM;
+
+	if (flags & MAP_FIXED) {
+		if (prepare_hugepage_range(file, addr, len))
+			return -EINVAL;
+		goto check_asce_limit;
+	}
+
+	if (addr) {
+		addr = ALIGN(addr, huge_page_size(h));
+		vma = find_vma(mm, addr);
+		if (TASK_SIZE - len >= addr && addr >= mmap_min_addr &&
+		    (!vma || addr + len <= vm_start_gap(vma)))
+			goto check_asce_limit;
+	}
+
+	if (mm->get_unmapped_area == arch_get_unmapped_area)
+		addr = hugetlb_get_unmapped_area_bottomup(file, addr, len,
+				pgoff, flags);
+	else
+		addr = hugetlb_get_unmapped_area_topdown(file, addr, len,
+				pgoff, flags);
+	if (addr & ~PAGE_MASK)
+		return addr;
+
+check_asce_limit:
+	if (addr + len > current->mm->context.asce_limit &&
+	    addr + len <= TASK_SIZE) {
+		rc = crst_table_upgrade(mm, addr + len);
+		if (rc)
+			return (unsigned long) rc;
+	}
+	return addr;
+}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 054/195] powerpc/xmon: dont access ASDR in VMs
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (52 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 053/195] s390/mm: fix dynamic pagetable upgrade for hugetlbfs Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 055/195] powerpc/pseries: Advance pfn if section is not present in lmb_is_removable() Greg Kroah-Hartman
                   ` (144 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Sukadev Bhattiprolu,
	Andrew Donnellan, Michael Ellerman

From: Sukadev Bhattiprolu <sukadev@linux.ibm.com>

commit c2a20711fc181e7f22ee5c16c28cb9578af84729 upstream.

ASDR is HV-privileged and must only be accessed in HV-mode.
Fixes a Program Check (0x700) when xmon in a VM dumps SPRs.

Fixes: d1e1b351f50f ("powerpc/xmon: Add ISA v3.0 SPRs to SPR dump")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200107021633.GB29843@us.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/xmon/xmon.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -1878,15 +1878,14 @@ static void dump_300_sprs(void)
 
 	printf("pidr   = %.16lx  tidr  = %.16lx\n",
 		mfspr(SPRN_PID), mfspr(SPRN_TIDR));
-	printf("asdr   = %.16lx  psscr = %.16lx\n",
-		mfspr(SPRN_ASDR), hv ? mfspr(SPRN_PSSCR)
-					: mfspr(SPRN_PSSCR_PR));
+	printf("psscr  = %.16lx\n",
+		hv ? mfspr(SPRN_PSSCR) : mfspr(SPRN_PSSCR_PR));
 
 	if (!hv)
 		return;
 
-	printf("ptcr   = %.16lx\n",
-		mfspr(SPRN_PTCR));
+	printf("ptcr   = %.16lx  asdr  = %.16lx\n",
+		mfspr(SPRN_PTCR), mfspr(SPRN_ASDR));
 #endif
 }
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 055/195] powerpc/pseries: Advance pfn if section is not present in lmb_is_removable()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (53 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 054/195] powerpc/xmon: dont access ASDR in VMs Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 056/195] smb3: fix signing verification of large reads Greg Kroah-Hartman
                   ` (143 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Pingfan Liu, Michael Ellerman

From: Pingfan Liu <kernelfans@gmail.com>

commit fbee6ba2dca30d302efe6bddb3a886f5e964a257 upstream.

In lmb_is_removable(), if a section is not present, it should continue
to test the rest of the sections in the block. But the current code
fails to do so.

Fixes: 51925fb3c5c9 ("powerpc/pseries: Implement memory hotplug remove in the kernel")
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1578632042-12415-1-git-send-email-kernelfans@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/platforms/pseries/hotplug-memory.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -366,8 +366,10 @@ static bool lmb_is_removable(struct drme
 
 	for (i = 0; i < scns_per_block; i++) {
 		pfn = PFN_DOWN(phys_addr);
-		if (!pfn_present(pfn))
+		if (!pfn_present(pfn)) {
+			phys_addr += MIN_MEMORY_BLOCK_SIZE;
 			continue;
+		}
 
 		rc &= is_mem_section_removable(pfn, PAGES_PER_SECTION);
 		phys_addr += MIN_MEMORY_BLOCK_SIZE;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 056/195] smb3: fix signing verification of large reads
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (54 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 055/195] powerpc/pseries: Advance pfn if section is not present in lmb_is_removable() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 057/195] PCI: tegra: Fix return value check of pm_runtime_get_sync() Greg Kroah-Hartman
                   ` (142 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Pavel Shilovsky, Steve French,
	Ronnie Sahlberg, Sasha Levin

From: Steve French <stfrench@microsoft.com>

[ Upstream commit 46f17d17687e8140f2e4e517d7dfa65e62fcc5f4 ]

Code cleanup in the 5.1 kernel changed the array
passed into signing verification on large reads leading
to warning messages being logged when copying files to local
systems from remote.

   SMB signature verification returned error = -5

This changeset fixes verification of SMB3 signatures of large
reads.

Suggested-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/cifs/smb2pdu.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3130,8 +3130,8 @@ smb2_readv_callback(struct mid_q_entry *
 	struct smb2_sync_hdr *shdr =
 				(struct smb2_sync_hdr *)rdata->iov[0].iov_base;
 	unsigned int credits_received = 0;
-	struct smb_rqst rqst = { .rq_iov = rdata->iov,
-				 .rq_nvec = 2,
+	struct smb_rqst rqst = { .rq_iov = &rdata->iov[1],
+				 .rq_nvec = 1,
 				 .rq_pages = rdata->pages,
 				 .rq_offset = rdata->page_offset,
 				 .rq_npages = rdata->nr_pages,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 057/195] PCI: tegra: Fix return value check of pm_runtime_get_sync()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (55 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 056/195] smb3: fix signing verification of large reads Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 058/195] mmc: spi: Toggle SPI polarity, do not hardcode it Greg Kroah-Hartman
                   ` (141 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, David Engraf, Bjorn Helgaas,
	Lorenzo Pieralisi, Andrew Murray

From: David Engraf <david.engraf@sysgo.com>

commit 885199148442f56b880995d703d2ed03b6481a3c upstream.

pm_runtime_get_sync() returns the device's usage counter. This might
be >0 if the device is already powered up or CONFIG_PM is disabled.

Abort probe function on real error only.

Fixes: da76ba50963b ("PCI: tegra: Add power management support")
Link: https://lore.kernel.org/r/20191216111825.28136-1-david.engraf@sysgo.com
Signed-off-by: David Engraf <david.engraf@sysgo.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Andrew Murray <andrew.murray@arm.com>
Cc: stable@vger.kernel.org	# v4.17+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pci/controller/pci-tegra.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pci/controller/pci-tegra.c
+++ b/drivers/pci/controller/pci-tegra.c
@@ -2398,7 +2398,7 @@ static int tegra_pcie_probe(struct platf
 
 	pm_runtime_enable(pcie->dev);
 	err = pm_runtime_get_sync(pcie->dev);
-	if (err) {
+	if (err < 0) {
 		dev_err(dev, "fail to enable pcie controller: %d\n", err);
 		goto teardown_msi;
 	}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 058/195] mmc: spi: Toggle SPI polarity, do not hardcode it
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (56 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 057/195] PCI: tegra: Fix return value check of pm_runtime_get_sync() Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 059/195] ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards Greg Kroah-Hartman
                   ` (140 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Phil Elwell, Mark Brown,
	Linus Walleij, Ulf Hansson

From: Linus Walleij <linus.walleij@linaro.org>

commit af3ed119329cf9690598c5a562d95dfd128e91d6 upstream.

The code in mmc_spi_initsequence() tries to send a burst with
high chipselect and for this reason hardcodes the device into
SPI_CS_HIGH.

This is not good because the SPI_CS_HIGH flag indicates
logical "asserted" CS not always the physical level. In
some cases the signal is inverted in the GPIO library and
in that case SPI_CS_HIGH is already set, and enforcing
SPI_CS_HIGH again will actually drive it low.

Instead of hard-coding this, toggle the polarity so if the
default is LOW it goes high to assert chipselect but if it
is already high then toggle it low instead.

Cc: Phil Elwell <phil@raspberrypi.org>
Reported-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20191204152749.12652-1-linus.walleij@linaro.org
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mmc/host/mmc_spi.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1154,17 +1154,22 @@ static void mmc_spi_initsequence(struct
 	 * SPI protocol.  Another is that when chipselect is released while
 	 * the card returns BUSY status, the clock must issue several cycles
 	 * with chipselect high before the card will stop driving its output.
+	 *
+	 * SPI_CS_HIGH means "asserted" here. In some cases like when using
+	 * GPIOs for chip select, SPI_CS_HIGH is set but this will be logically
+	 * inverted by gpiolib, so if we want to ascertain to drive it high
+	 * we should toggle the default with an XOR as we do here.
 	 */
-	host->spi->mode |= SPI_CS_HIGH;
+	host->spi->mode ^= SPI_CS_HIGH;
 	if (spi_setup(host->spi) != 0) {
 		/* Just warn; most cards work without it. */
 		dev_warn(&host->spi->dev,
 				"can't change chip-select polarity\n");
-		host->spi->mode &= ~SPI_CS_HIGH;
+		host->spi->mode ^= SPI_CS_HIGH;
 	} else {
 		mmc_spi_readbytes(host, 18);
 
-		host->spi->mode &= ~SPI_CS_HIGH;
+		host->spi->mode ^= SPI_CS_HIGH;
 		if (spi_setup(host->spi) != 0) {
 			/* Wot, we can't get the same setup we had before? */
 			dev_err(&host->spi->dev,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 059/195] ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (57 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 058/195] mmc: spi: Toggle SPI polarity, do not hardcode it Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 060/195] ACPI / battery: Deal with design or full capacity being reported as -1 Greg Kroah-Hartman
                   ` (139 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Hans de Goede, Rafael J. Wysocki

From: Hans de Goede <hdegoede@redhat.com>

commit d21a91629f4b8e794fc4c0e0c17c85cedf1d806c upstream.

Despite our heuristics to not wrongly export a non working ACPI backlight
interface on desktop machines, we still end up exporting one on desktops
using a motherboard from the MSI MS-7721 series.

I've looked at improving the heuristics, but in this case a quirk seems
to be the only way to solve this.

While at it also add a comment to separate the video_detect_force_none
entries in the video_detect_dmi_table from other type of entries, as we
already do for the other entry types.

Cc: All applicable <stable@vger.kernel.org>
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1783786
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/video_detect.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -328,6 +328,11 @@ static const struct dmi_system_id video_
 		DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
 		},
 	},
+
+	/*
+	 * Desktops which falsely report a backlight and which our heuristics
+	 * for this do not catch.
+	 */
 	{
 	 .callback = video_detect_force_none,
 	 .ident = "Dell OptiPlex 9020M",
@@ -336,6 +341,14 @@ static const struct dmi_system_id video_
 		DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"),
 		},
 	},
+	{
+	 .callback = video_detect_force_none,
+	 .ident = "MSI MS-7721",
+	 .matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "MS-7721"),
+		},
+	},
 	{ },
 };
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 060/195] ACPI / battery: Deal with design or full capacity being reported as -1
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (58 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 059/195] ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:31 ` [PATCH 4.19 061/195] ACPI / battery: Use design-cap for capacity calculations if full-cap is not available Greg Kroah-Hartman
                   ` (138 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Hans de Goede, Rafael J. Wysocki

From: Hans de Goede <hdegoede@redhat.com>

commit cc99f0ad52467028cb1251160f23ad4bb65baf20 upstream.

Commit b41901a2cf06 ("ACPI / battery: Do not export energy_full[_design]
on devices without full_charge_capacity") added support for some (broken)
devices which always report 0 for both design- and full_charge-capacity.

This assumes that if the capacity is not being reported it is 0. The
ThunderSoft TS178 tablet's _BIX implementation falsifies this assumption.
It reports ACPI_BATTERY_VALUE_UNKNOWN (-1) as full_charge_capacity, which
we treat as a valid value which causes several problems.

This commit fixes this by adding a new ACPI_BATTERY_CAPACITY_VALID() helper
which checks that the value is not 0 and not -1; and using this whenever we
need to test if either design_capacity or full_charge_capacity is valid.

Fixes: b41901a2cf06 ("ACPI / battery: Do not export energy_full[_design] on devices without full_charge_capacity")
Cc: 4.19+ <stable@vger.kernel.org> # 4.19+
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/battery.c |   19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -51,6 +51,8 @@
 #define PREFIX "ACPI: "
 
 #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
+#define ACPI_BATTERY_CAPACITY_VALID(capacity) \
+	((capacity) != 0 && (capacity) != ACPI_BATTERY_VALUE_UNKNOWN)
 
 #define ACPI_BATTERY_DEVICE_NAME	"Battery"
 
@@ -205,7 +207,8 @@ static int acpi_battery_is_charged(struc
 
 static bool acpi_battery_is_degraded(struct acpi_battery *battery)
 {
-	return battery->full_charge_capacity && battery->design_capacity &&
+	return ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) &&
+		ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity) &&
 		battery->full_charge_capacity < battery->design_capacity;
 }
 
@@ -276,14 +279,14 @@ static int acpi_battery_get_property(str
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
 	case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
-		if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
+		if (!ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity))
 			ret = -ENODEV;
 		else
 			val->intval = battery->design_capacity * 1000;
 		break;
 	case POWER_SUPPLY_PROP_CHARGE_FULL:
 	case POWER_SUPPLY_PROP_ENERGY_FULL:
-		if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
+		if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity))
 			ret = -ENODEV;
 		else
 			val->intval = battery->full_charge_capacity * 1000;
@@ -296,11 +299,12 @@ static int acpi_battery_get_property(str
 			val->intval = battery->capacity_now * 1000;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY:
-		if (battery->capacity_now && battery->full_charge_capacity)
+		if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
+		    !ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity))
+			ret = -ENODEV;
+		else
 			val->intval = battery->capacity_now * 100/
 					battery->full_charge_capacity;
-		else
-			val->intval = 0;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
 		if (battery->state & ACPI_BATTERY_STATE_CRITICAL)
@@ -812,7 +816,8 @@ static int sysfs_add_battery(struct acpi
 		battery->bat_desc.properties = charge_battery_props;
 		battery->bat_desc.num_properties =
 			ARRAY_SIZE(charge_battery_props);
-	} else if (battery->full_charge_capacity == 0) {
+	} else if (!ACPI_BATTERY_CAPACITY_VALID(
+					battery->full_charge_capacity)) {
 		battery->bat_desc.properties =
 			energy_battery_full_cap_broken_props;
 		battery->bat_desc.num_properties =



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 061/195] ACPI / battery: Use design-cap for capacity calculations if full-cap is not available
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (59 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 060/195] ACPI / battery: Deal with design or full capacity being reported as -1 Greg Kroah-Hartman
@ 2020-02-10 12:31 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 062/195] ACPI / battery: Deal better with neither design nor full capacity not being reported Greg Kroah-Hartman
                   ` (137 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:31 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Hans de Goede, Rafael J. Wysocki

From: Hans de Goede <hdegoede@redhat.com>

commit 5b74d1d16e2f5753fcbdecd6771b2d8370dda414 upstream.

The ThunderSoft TS178 tablet's _BIX implementation reports design_capacity
but not full_charge_capacity.

Before this commit this would cause us to return -ENODEV for the capacity
attribute, which userspace does not like. Specifically upower does this:

        if (sysfs_file_exists (native_path, "capacity")) {
                percentage = sysfs_get_double (native_path, "capacity");

Where the sysfs_get_double() helper returns 0 when we return -ENODEV,
so the battery always reads 0% if we return -ENODEV.

This commit fixes this by using the design-capacity instead of the
full-charge-capacity when the full-charge-capacity is not available.

Fixes: b41901a2cf06 ("ACPI / battery: Do not export energy_full[_design] on devices without full_charge_capacity")
Cc: 4.19+ <stable@vger.kernel.org> # 4.19+
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/battery.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -230,7 +230,7 @@ static int acpi_battery_get_property(str
 				     enum power_supply_property psp,
 				     union power_supply_propval *val)
 {
-	int ret = 0;
+	int full_capacity = ACPI_BATTERY_VALUE_UNKNOWN, ret = 0;
 	struct acpi_battery *battery = to_acpi_battery(psy);
 
 	if (acpi_battery_present(battery)) {
@@ -299,12 +299,17 @@ static int acpi_battery_get_property(str
 			val->intval = battery->capacity_now * 1000;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY:
+		if (ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity))
+			full_capacity = battery->full_charge_capacity;
+		else if (ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity))
+			full_capacity = battery->design_capacity;
+
 		if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
-		    !ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity))
+		    full_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
 			ret = -ENODEV;
 		else
 			val->intval = battery->capacity_now * 100/
-					battery->full_charge_capacity;
+					full_capacity;
 		break;
 	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
 		if (battery->state & ACPI_BATTERY_STATE_CRITICAL)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 062/195] ACPI / battery: Deal better with neither design nor full capacity not being reported
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (60 preceding siblings ...)
  2020-02-10 12:31 ` [PATCH 4.19 061/195] ACPI / battery: Use design-cap for capacity calculations if full-cap is not available Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 063/195] alarmtimer: Unregister wakeup source when module get fails Greg Kroah-Hartman
                   ` (136 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Hans de Goede, Rafael J. Wysocki

From: Hans de Goede <hdegoede@redhat.com>

commit ff3154d1d89a2343fd5f82e65bc0cf1d4e6659b3 upstream.

Commit b41901a2cf06 ("ACPI / battery: Do not export energy_full[_design] on
devices without full_charge_capacity") added support for some (broken)
devices which always report 0 for both design_capacity and
full_charge_capacity.

Since the device that commit was written as a fix for is not reporting any
form of "full" capacity we cannot calculate the value for the
POWER_SUPPLY_PROP_CAPACITY, this is worked around by using an alternative
array of available properties which does not contain this property.

This is necessary because userspace (upower) treats us returning -ENODEV
as 0 and then typically will trigger an emergency shutdown because of that.
Userspace does not do this if the capacity sysfs attribute is not present
at all.

There are two potential problems with that commit:
 1) It assumes that both full_charge- and design-capacity are broken at the
    same time and only checks if full_charge- is broken.
 2) It assumes that this only ever happens for devices which report energy
    units rather then charge units.

This commit fixes both issues by only using the alternative
array of available properties if both full_charge- and design-capacity are
broken and by also adding an alternative array of available properties for
devices using mA units.

Fixes: b41901a2cf06 ("ACPI / battery: Do not export energy_full[_design] on devices without full_charge_capacity")
Cc: 4.19+ <stable@vger.kernel.org> # 4.19+
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/battery.c |   51 +++++++++++++++++++++++++++++++++++++------------
 1 file changed, 39 insertions(+), 12 deletions(-)

--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -355,6 +355,20 @@ static enum power_supply_property charge
 	POWER_SUPPLY_PROP_SERIAL_NUMBER,
 };
 
+static enum power_supply_property charge_battery_full_cap_broken_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_CYCLE_COUNT,
+	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CHARGE_NOW,
+	POWER_SUPPLY_PROP_MODEL_NAME,
+	POWER_SUPPLY_PROP_MANUFACTURER,
+	POWER_SUPPLY_PROP_SERIAL_NUMBER,
+};
+
 static enum power_supply_property energy_battery_props[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_PRESENT,
@@ -816,21 +830,34 @@ static void __exit battery_hook_exit(voi
 static int sysfs_add_battery(struct acpi_battery *battery)
 {
 	struct power_supply_config psy_cfg = { .drv_data = battery, };
+	bool full_cap_broken = false;
+
+	if (!ACPI_BATTERY_CAPACITY_VALID(battery->full_charge_capacity) &&
+	    !ACPI_BATTERY_CAPACITY_VALID(battery->design_capacity))
+		full_cap_broken = true;
 
 	if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
-		battery->bat_desc.properties = charge_battery_props;
-		battery->bat_desc.num_properties =
-			ARRAY_SIZE(charge_battery_props);
-	} else if (!ACPI_BATTERY_CAPACITY_VALID(
-					battery->full_charge_capacity)) {
-		battery->bat_desc.properties =
-			energy_battery_full_cap_broken_props;
-		battery->bat_desc.num_properties =
-			ARRAY_SIZE(energy_battery_full_cap_broken_props);
+		if (full_cap_broken) {
+			battery->bat_desc.properties =
+			    charge_battery_full_cap_broken_props;
+			battery->bat_desc.num_properties =
+			    ARRAY_SIZE(charge_battery_full_cap_broken_props);
+		} else {
+			battery->bat_desc.properties = charge_battery_props;
+			battery->bat_desc.num_properties =
+			    ARRAY_SIZE(charge_battery_props);
+		}
 	} else {
-		battery->bat_desc.properties = energy_battery_props;
-		battery->bat_desc.num_properties =
-			ARRAY_SIZE(energy_battery_props);
+		if (full_cap_broken) {
+			battery->bat_desc.properties =
+			    energy_battery_full_cap_broken_props;
+			battery->bat_desc.num_properties =
+			    ARRAY_SIZE(energy_battery_full_cap_broken_props);
+		} else {
+			battery->bat_desc.properties = energy_battery_props;
+			battery->bat_desc.num_properties =
+			    ARRAY_SIZE(energy_battery_props);
+		}
 	}
 
 	battery->bat_desc.name = acpi_device_bid(battery->device);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 063/195] alarmtimer: Unregister wakeup source when module get fails
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (61 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 062/195] ACPI / battery: Deal better with neither design nor full capacity not being reported Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 064/195] ubifs: Reject unsupported ioctl flags explicitly Greg Kroah-Hartman
                   ` (135 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Stephen Boyd, Thomas Gleixner,
	Douglas Anderson

From: Stephen Boyd <swboyd@chromium.org>

commit 6b6d188aae79a630957aefd88ff5c42af6553ee3 upstream.

The alarmtimer_rtc_add_device() function creates a wakeup source and then
tries to grab a module reference. If that fails the function returns early
with an error code, but fails to remove the wakeup source.

Cleanup this exit path so there is no dangling wakeup source, which is
named 'alarmtime' left allocated which will conflict with another RTC
device that may be registered later.

Fixes: 51218298a25e ("alarmtimer: Ensure RTC module is not unloaded")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200109155910.907-2-swboyd@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/time/alarmtimer.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -91,6 +91,7 @@ static int alarmtimer_rtc_add_device(str
 	unsigned long flags;
 	struct rtc_device *rtc = to_rtc_device(dev);
 	struct wakeup_source *__ws;
+	int ret = 0;
 
 	if (rtcdev)
 		return -EBUSY;
@@ -105,8 +106,8 @@ static int alarmtimer_rtc_add_device(str
 	spin_lock_irqsave(&rtcdev_lock, flags);
 	if (!rtcdev) {
 		if (!try_module_get(rtc->owner)) {
-			spin_unlock_irqrestore(&rtcdev_lock, flags);
-			return -1;
+			ret = -1;
+			goto unlock;
 		}
 
 		rtcdev = rtc;
@@ -115,11 +116,12 @@ static int alarmtimer_rtc_add_device(str
 		ws = __ws;
 		__ws = NULL;
 	}
+unlock:
 	spin_unlock_irqrestore(&rtcdev_lock, flags);
 
 	wakeup_source_unregister(__ws);
 
-	return 0;
+	return ret;
 }
 
 static inline void alarmtimer_rtc_timer_init(void)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 064/195] ubifs: Reject unsupported ioctl flags explicitly
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (62 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 063/195] alarmtimer: Unregister wakeup source when module get fails Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 065/195] ubifs: dont trigger assertion on invalid no-key filename Greg Kroah-Hartman
                   ` (134 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Hou Tao, Richard Weinberger

From: Hou Tao <houtao1@huawei.com>

commit 2fe8b2d5578d7d142982e3bf62e4c0caf8b8fe02 upstream.

Reject unsupported ioctl flags explicitly, so the following command
on a regular ubifs file will fail:
	chattr +d ubifs_file

And xfstests generic/424 will pass.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/ubifs/ioctl.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -28,6 +28,11 @@
 #include <linux/mount.h>
 #include "ubifs.h"
 
+/* Need to be kept consistent with checked flags in ioctl2ubifs() */
+#define UBIFS_SUPPORTED_IOCTL_FLAGS \
+	(FS_COMPR_FL | FS_SYNC_FL | FS_APPEND_FL | \
+	 FS_IMMUTABLE_FL | FS_DIRSYNC_FL)
+
 /**
  * ubifs_set_inode_flags - set VFS inode flags.
  * @inode: VFS inode to set flags for
@@ -169,6 +174,9 @@ long ubifs_ioctl(struct file *file, unsi
 		if (get_user(flags, (int __user *) arg))
 			return -EFAULT;
 
+		if (flags & ~UBIFS_SUPPORTED_IOCTL_FLAGS)
+			return -EOPNOTSUPP;
+
 		if (!S_ISDIR(inode->i_mode))
 			flags &= ~FS_DIRSYNC_FL;
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 065/195] ubifs: dont trigger assertion on invalid no-key filename
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (63 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 064/195] ubifs: Reject unsupported ioctl flags explicitly Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 066/195] ubifs: Fix FS_IOC_SETFLAGS unexpectedly clearing encrypt flag Greg Kroah-Hartman
                   ` (133 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Eric Biggers

From: Eric Biggers <ebiggers@google.com>

commit f0d07a98a070bb5e443df19c3aa55693cbca9341 upstream.

If userspace provides an invalid fscrypt no-key filename which encodes a
hash value with any of the UBIFS node type bits set (i.e. the high 3
bits), gracefully report ENOENT rather than triggering ubifs_assert().

Test case with kvm-xfstests shell:

    . fs/ubifs/config
    . ~/xfstests/common/encrypt
    dev=$(__blkdev_to_ubi_volume /dev/vdc)
    ubiupdatevol $dev -t
    mount $dev /mnt -t ubifs
    mkdir /mnt/edir
    xfs_io -c set_encpolicy /mnt/edir
    rm /mnt/edir/_,,,,,DAAAAAAAAAAAAAAAAAAAAAAAAAA

With the bug, the following assertion fails on the 'rm' command:

    [   19.066048] UBIFS error (ubi0:0 pid 379): ubifs_assert_failed: UBIFS assert failed: !(hash & ~UBIFS_S_KEY_HASH_MASK), in fs/ubifs/key.h:170

Fixes: f4f61d2cc6d8 ("ubifs: Implement encrypted filenames")
Cc: <stable@vger.kernel.org> # v4.10+
Link: https://lore.kernel.org/r/20200120223201.241390-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/ubifs/dir.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -242,6 +242,8 @@ static struct dentry *ubifs_lookup(struc
 	if (nm.hash) {
 		ubifs_assert(c, fname_len(&nm) == 0);
 		ubifs_assert(c, fname_name(&nm) == NULL);
+		if (nm.hash & ~UBIFS_S_KEY_HASH_MASK)
+			goto done; /* ENOENT */
 		dent_key_init_hash(c, &key, dir->i_ino, nm.hash);
 		err = ubifs_tnc_lookup_dh(c, &key, dent, nm.minor_hash);
 	} else {



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 066/195] ubifs: Fix FS_IOC_SETFLAGS unexpectedly clearing encrypt flag
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (64 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 065/195] ubifs: dont trigger assertion on invalid no-key filename Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 067/195] ubifs: Fix deadlock in concurrent bulk-read and writepage Greg Kroah-Hartman
                   ` (132 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Eric Biggers, Richard Weinberger

From: Eric Biggers <ebiggers@google.com>

commit 2b57067a7778484c10892fa191997bfda29fea13 upstream.

UBIFS's implementation of FS_IOC_SETFLAGS fails to preserve existing
inode flags that aren't settable by FS_IOC_SETFLAGS, namely the encrypt
flag.  This causes the encrypt flag to be unexpectedly cleared.

Fix it by preserving existing unsettable flags, like ext4 and f2fs do.

Test case with kvm-xfstests shell:

    FSTYP=ubifs KEYCTL_PROG=keyctl
    . fs/ubifs/config
    . ~/xfstests/common/encrypt
    dev=$(__blkdev_to_ubi_volume /dev/vdc)
    ubiupdatevol -t $dev
    mount $dev /mnt -t ubifs
    k=$(_generate_session_encryption_key)
    mkdir /mnt/edir
    xfs_io -c "set_encpolicy $k" /mnt/edir
    echo contents > /mnt/edir/file
    chattr +i /mnt/edir/file
    chattr -i /mnt/edir/file

With the bug, the following errors occur on the last command:

    [   18.081559] fscrypt (ubifs, inode 67): Inconsistent encryption context (parent directory: 65)
    chattr: Operation not permitted while reading flags on /mnt/edir/file

Fixes: d475a507457b ("ubifs: Add skeleton for fscrypto")
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/ubifs/ioctl.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -132,7 +132,8 @@ static int setflags(struct inode *inode,
 		}
 	}
 
-	ui->flags = ioctl2ubifs(flags);
+	ui->flags &= ~ioctl2ubifs(UBIFS_SUPPORTED_IOCTL_FLAGS);
+	ui->flags |= ioctl2ubifs(flags);
 	ubifs_set_inode_flags(inode);
 	inode->i_ctime = current_time(inode);
 	release = ui->dirty;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 067/195] ubifs: Fix deadlock in concurrent bulk-read and writepage
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (65 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 066/195] ubifs: Fix FS_IOC_SETFLAGS unexpectedly clearing encrypt flag Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 068/195] crypto: geode-aes - convert to skcipher API and make thread-safe Greg Kroah-Hartman
                   ` (131 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Zhihao Cheng, zhangyi (F),
	Stable, Richard Weinberger

From: Zhihao Cheng <chengzhihao1@huawei.com>

commit f5de5b83303e61b1f3fb09bd77ce3ac2d7a475f2 upstream.

In ubifs, concurrent execution of writepage and bulk read on the same file
may cause ABBA deadlock, for example (Reproduce method see Link):

Process A(Bulk-read starts from page4)         Process B(write page4 back)
  vfs_read                                       wb_workfn or fsync
  ...                                            ...
  generic_file_buffered_read                     write_cache_pages
    ubifs_readpage                                 LOCK(page4)

      ubifs_bulk_read                              ubifs_writepage
        LOCK(ui->ui_mutex)                           ubifs_write_inode

	  ubifs_do_bulk_read                           LOCK(ui->ui_mutex)
	    find_or_create_page(alloc page4)                  ↑
	      LOCK(page4)                   <--     ABBA deadlock occurs!

In order to ensure the serialization execution of bulk read, we can't
remove the big lock 'ui->ui_mutex' in ubifs_bulk_read(). Instead, we
allow ubifs_do_bulk_read() to lock page failed by replacing
find_or_create_page(FGP_LOCK) with
pagecache_get_page(FGP_LOCK | FGP_NOWAIT).

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Suggested-by: zhangyi (F) <yi.zhang@huawei.com>
Cc: <Stable@vger.kernel.org>
Fixes: 4793e7c5e1c ("UBIFS: add bulk-read facility")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206153
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/ubifs/file.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -798,7 +798,9 @@ static int ubifs_do_bulk_read(struct ubi
 
 		if (page_offset > end_index)
 			break;
-		page = find_or_create_page(mapping, page_offset, ra_gfp_mask);
+		page = pagecache_get_page(mapping, page_offset,
+				 FGP_LOCK|FGP_ACCESSED|FGP_CREAT|FGP_NOWAIT,
+				 ra_gfp_mask);
 		if (!page)
 			break;
 		if (!PageUptodate(page))



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 068/195] crypto: geode-aes - convert to skcipher API and make thread-safe
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (66 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 067/195] ubifs: Fix deadlock in concurrent bulk-read and writepage Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 069/195] PCI: keystone: Fix link training retries initiation Greg Kroah-Hartman
                   ` (130 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Biggers, Herbert Xu, Florian Bezdeka

From: Eric Biggers <ebiggers@google.com>

commit 4549f7e5aa27ffc2cba63b5db8842a3b486f5688 upstream.

The geode AES driver is heavily broken because it stores per-request
state in the transform context.  So it will crash or produce the wrong
result if used by any of the many places in the kernel that issue
concurrent requests for the same transform object.

This driver is also implemented using the deprecated blkcipher API,
which makes it difficult to fix, and puts it among the drivers
preventing that API from being removed.

Convert this driver to use the skcipher API, and change it to not store
per-request state in the transform context.

Fixes: 9fe757b0cfce ("[PATCH] crypto: Add support for the Geode LX AES hardware")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Florian Bezdeka <florian@bezdeka.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/geode-aes.c |  450 +++++++++++++++------------------------------
 drivers/crypto/geode-aes.h |   15 -
 2 files changed, 153 insertions(+), 312 deletions(-)

--- a/drivers/crypto/geode-aes.c
+++ b/drivers/crypto/geode-aes.c
@@ -14,7 +14,7 @@
 #include <linux/spinlock.h>
 #include <crypto/algapi.h>
 #include <crypto/aes.h>
-#include <crypto/skcipher.h>
+#include <crypto/internal/skcipher.h>
 
 #include <linux/io.h>
 #include <linux/delay.h>
@@ -28,12 +28,12 @@ static spinlock_t lock;
 
 /* Write a 128 bit field (either a writable key or IV) */
 static inline void
-_writefield(u32 offset, void *value)
+_writefield(u32 offset, const void *value)
 {
 	int i;
 
 	for (i = 0; i < 4; i++)
-		iowrite32(((u32 *) value)[i], _iobase + offset + (i * 4));
+		iowrite32(((const u32 *) value)[i], _iobase + offset + (i * 4));
 }
 
 /* Read a 128 bit field (either a writable key or IV) */
@@ -47,12 +47,12 @@ _readfield(u32 offset, void *value)
 }
 
 static int
-do_crypt(void *src, void *dst, int len, u32 flags)
+do_crypt(const void *src, void *dst, u32 len, u32 flags)
 {
 	u32 status;
 	u32 counter = AES_OP_TIMEOUT;
 
-	iowrite32(virt_to_phys(src), _iobase + AES_SOURCEA_REG);
+	iowrite32(virt_to_phys((void *)src), _iobase + AES_SOURCEA_REG);
 	iowrite32(virt_to_phys(dst), _iobase + AES_DSTA_REG);
 	iowrite32(len,  _iobase + AES_LENA_REG);
 
@@ -69,16 +69,14 @@ do_crypt(void *src, void *dst, int len,
 	return counter ? 0 : 1;
 }
 
-static unsigned int
-geode_aes_crypt(struct geode_aes_op *op)
+static void
+geode_aes_crypt(const struct geode_aes_tfm_ctx *tctx, const void *src,
+		void *dst, u32 len, u8 *iv, int mode, int dir)
 {
 	u32 flags = 0;
 	unsigned long iflags;
 	int ret;
 
-	if (op->len == 0)
-		return 0;
-
 	/* If the source and destination is the same, then
 	 * we need to turn on the coherent flags, otherwise
 	 * we don't need to worry
@@ -86,32 +84,28 @@ geode_aes_crypt(struct geode_aes_op *op)
 
 	flags |= (AES_CTRL_DCA | AES_CTRL_SCA);
 
-	if (op->dir == AES_DIR_ENCRYPT)
+	if (dir == AES_DIR_ENCRYPT)
 		flags |= AES_CTRL_ENCRYPT;
 
 	/* Start the critical section */
 
 	spin_lock_irqsave(&lock, iflags);
 
-	if (op->mode == AES_MODE_CBC) {
+	if (mode == AES_MODE_CBC) {
 		flags |= AES_CTRL_CBC;
-		_writefield(AES_WRITEIV0_REG, op->iv);
+		_writefield(AES_WRITEIV0_REG, iv);
 	}
 
-	if (!(op->flags & AES_FLAGS_HIDDENKEY)) {
-		flags |= AES_CTRL_WRKEY;
-		_writefield(AES_WRITEKEY0_REG, op->key);
-	}
+	flags |= AES_CTRL_WRKEY;
+	_writefield(AES_WRITEKEY0_REG, tctx->key);
 
-	ret = do_crypt(op->src, op->dst, op->len, flags);
+	ret = do_crypt(src, dst, len, flags);
 	BUG_ON(ret);
 
-	if (op->mode == AES_MODE_CBC)
-		_readfield(AES_WRITEIV0_REG, op->iv);
+	if (mode == AES_MODE_CBC)
+		_readfield(AES_WRITEIV0_REG, iv);
 
 	spin_unlock_irqrestore(&lock, iflags);
-
-	return op->len;
 }
 
 /* CRYPTO-API Functions */
@@ -119,13 +113,13 @@ geode_aes_crypt(struct geode_aes_op *op)
 static int geode_setkey_cip(struct crypto_tfm *tfm, const u8 *key,
 		unsigned int len)
 {
-	struct geode_aes_op *op = crypto_tfm_ctx(tfm);
+	struct geode_aes_tfm_ctx *tctx = crypto_tfm_ctx(tfm);
 	unsigned int ret;
 
-	op->keylen = len;
+	tctx->keylen = len;
 
 	if (len == AES_KEYSIZE_128) {
-		memcpy(op->key, key, len);
+		memcpy(tctx->key, key, len);
 		return 0;
 	}
 
@@ -138,132 +132,93 @@ static int geode_setkey_cip(struct crypt
 	/*
 	 * The requested key size is not supported by HW, do a fallback
 	 */
-	op->fallback.cip->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
-	op->fallback.cip->base.crt_flags |= (tfm->crt_flags & CRYPTO_TFM_REQ_MASK);
+	tctx->fallback.cip->base.crt_flags &= ~CRYPTO_TFM_REQ_MASK;
+	tctx->fallback.cip->base.crt_flags |=
+		(tfm->crt_flags & CRYPTO_TFM_REQ_MASK);
 
-	ret = crypto_cipher_setkey(op->fallback.cip, key, len);
+	ret = crypto_cipher_setkey(tctx->fallback.cip, key, len);
 	if (ret) {
 		tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
-		tfm->crt_flags |= (op->fallback.cip->base.crt_flags & CRYPTO_TFM_RES_MASK);
+		tfm->crt_flags |= (tctx->fallback.cip->base.crt_flags &
+				   CRYPTO_TFM_RES_MASK);
 	}
 	return ret;
 }
 
-static int geode_setkey_blk(struct crypto_tfm *tfm, const u8 *key,
-		unsigned int len)
+static int geode_setkey_skcipher(struct crypto_skcipher *tfm, const u8 *key,
+				 unsigned int len)
 {
-	struct geode_aes_op *op = crypto_tfm_ctx(tfm);
+	struct geode_aes_tfm_ctx *tctx = crypto_skcipher_ctx(tfm);
 	unsigned int ret;
 
-	op->keylen = len;
+	tctx->keylen = len;
 
 	if (len == AES_KEYSIZE_128) {
-		memcpy(op->key, key, len);
+		memcpy(tctx->key, key, len);
 		return 0;
 	}
 
 	if (len != AES_KEYSIZE_192 && len != AES_KEYSIZE_256) {
 		/* not supported at all */
-		tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+		crypto_skcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
 		return -EINVAL;
 	}
 
 	/*
 	 * The requested key size is not supported by HW, do a fallback
 	 */
-	crypto_skcipher_clear_flags(op->fallback.blk, CRYPTO_TFM_REQ_MASK);
-	crypto_skcipher_set_flags(op->fallback.blk,
-				  tfm->crt_flags & CRYPTO_TFM_REQ_MASK);
-
-	ret = crypto_skcipher_setkey(op->fallback.blk, key, len);
-	if (ret) {
-		tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
-		tfm->crt_flags |= crypto_skcipher_get_flags(op->fallback.blk) &
-				  CRYPTO_TFM_RES_MASK;
-	}
+	crypto_skcipher_clear_flags(tctx->fallback.skcipher,
+				    CRYPTO_TFM_REQ_MASK);
+	crypto_skcipher_set_flags(tctx->fallback.skcipher,
+				  crypto_skcipher_get_flags(tfm) &
+				  CRYPTO_TFM_REQ_MASK);
+	ret = crypto_skcipher_setkey(tctx->fallback.skcipher, key, len);
+	crypto_skcipher_set_flags(tfm,
+				  crypto_skcipher_get_flags(tctx->fallback.skcipher) &
+				  CRYPTO_TFM_RES_MASK);
 	return ret;
 }
 
-static int fallback_blk_dec(struct blkcipher_desc *desc,
-		struct scatterlist *dst, struct scatterlist *src,
-		unsigned int nbytes)
-{
-	struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
-	SKCIPHER_REQUEST_ON_STACK(req, op->fallback.blk);
-
-	skcipher_request_set_tfm(req, op->fallback.blk);
-	skcipher_request_set_callback(req, 0, NULL, NULL);
-	skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
-
-	return crypto_skcipher_decrypt(req);
-}
-
-static int fallback_blk_enc(struct blkcipher_desc *desc,
-		struct scatterlist *dst, struct scatterlist *src,
-		unsigned int nbytes)
-{
-	struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
-	SKCIPHER_REQUEST_ON_STACK(req, op->fallback.blk);
-
-	skcipher_request_set_tfm(req, op->fallback.blk);
-	skcipher_request_set_callback(req, 0, NULL, NULL);
-	skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
-
-	return crypto_skcipher_encrypt(req);
-}
-
 static void
 geode_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
-	struct geode_aes_op *op = crypto_tfm_ctx(tfm);
+	const struct geode_aes_tfm_ctx *tctx = crypto_tfm_ctx(tfm);
 
-	if (unlikely(op->keylen != AES_KEYSIZE_128)) {
-		crypto_cipher_encrypt_one(op->fallback.cip, out, in);
+	if (unlikely(tctx->keylen != AES_KEYSIZE_128)) {
+		crypto_cipher_encrypt_one(tctx->fallback.cip, out, in);
 		return;
 	}
 
-	op->src = (void *) in;
-	op->dst = (void *) out;
-	op->mode = AES_MODE_ECB;
-	op->flags = 0;
-	op->len = AES_BLOCK_SIZE;
-	op->dir = AES_DIR_ENCRYPT;
-
-	geode_aes_crypt(op);
+	geode_aes_crypt(tctx, in, out, AES_BLOCK_SIZE, NULL,
+			AES_MODE_ECB, AES_DIR_ENCRYPT);
 }
 
 
 static void
 geode_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 {
-	struct geode_aes_op *op = crypto_tfm_ctx(tfm);
+	const struct geode_aes_tfm_ctx *tctx = crypto_tfm_ctx(tfm);
 
-	if (unlikely(op->keylen != AES_KEYSIZE_128)) {
-		crypto_cipher_decrypt_one(op->fallback.cip, out, in);
+	if (unlikely(tctx->keylen != AES_KEYSIZE_128)) {
+		crypto_cipher_decrypt_one(tctx->fallback.cip, out, in);
 		return;
 	}
 
-	op->src = (void *) in;
-	op->dst = (void *) out;
-	op->mode = AES_MODE_ECB;
-	op->flags = 0;
-	op->len = AES_BLOCK_SIZE;
-	op->dir = AES_DIR_DECRYPT;
-
-	geode_aes_crypt(op);
+	geode_aes_crypt(tctx, in, out, AES_BLOCK_SIZE, NULL,
+			AES_MODE_ECB, AES_DIR_DECRYPT);
 }
 
 static int fallback_init_cip(struct crypto_tfm *tfm)
 {
 	const char *name = crypto_tfm_alg_name(tfm);
-	struct geode_aes_op *op = crypto_tfm_ctx(tfm);
+	struct geode_aes_tfm_ctx *tctx = crypto_tfm_ctx(tfm);
 
-	op->fallback.cip = crypto_alloc_cipher(name, 0,
-				CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
+	tctx->fallback.cip = crypto_alloc_cipher(name, 0,
+						 CRYPTO_ALG_NEED_FALLBACK);
 
-	if (IS_ERR(op->fallback.cip)) {
+	if (IS_ERR(tctx->fallback.cip)) {
 		printk(KERN_ERR "Error allocating fallback algo %s\n", name);
-		return PTR_ERR(op->fallback.cip);
+		return PTR_ERR(tctx->fallback.cip);
 	}
 
 	return 0;
@@ -271,10 +226,9 @@ static int fallback_init_cip(struct cryp
 
 static void fallback_exit_cip(struct crypto_tfm *tfm)
 {
-	struct geode_aes_op *op = crypto_tfm_ctx(tfm);
+	struct geode_aes_tfm_ctx *tctx = crypto_tfm_ctx(tfm);
 
-	crypto_free_cipher(op->fallback.cip);
-	op->fallback.cip = NULL;
+	crypto_free_cipher(tctx->fallback.cip);
 }
 
 static struct crypto_alg geode_alg = {
@@ -287,7 +241,7 @@ static struct crypto_alg geode_alg = {
 	.cra_init			=	fallback_init_cip,
 	.cra_exit			=	fallback_exit_cip,
 	.cra_blocksize		=	AES_BLOCK_SIZE,
-	.cra_ctxsize		=	sizeof(struct geode_aes_op),
+	.cra_ctxsize		=	sizeof(struct geode_aes_tfm_ctx),
 	.cra_module			=	THIS_MODULE,
 	.cra_u				=	{
 		.cipher	=	{
@@ -300,222 +254,126 @@ static struct crypto_alg geode_alg = {
 	}
 };
 
-static int
-geode_cbc_decrypt(struct blkcipher_desc *desc,
-		  struct scatterlist *dst, struct scatterlist *src,
-		  unsigned int nbytes)
-{
-	struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
-	struct blkcipher_walk walk;
-	int err, ret;
-
-	if (nbytes % AES_BLOCK_SIZE)
-		return -EINVAL;
-
-	if (unlikely(op->keylen != AES_KEYSIZE_128))
-		return fallback_blk_dec(desc, dst, src, nbytes);
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	err = blkcipher_walk_virt(desc, &walk);
-	op->iv = walk.iv;
-
-	while ((nbytes = walk.nbytes)) {
-		op->src = walk.src.virt.addr,
-		op->dst = walk.dst.virt.addr;
-		op->mode = AES_MODE_CBC;
-		op->len = nbytes - (nbytes % AES_BLOCK_SIZE);
-		op->dir = AES_DIR_DECRYPT;
-
-		ret = geode_aes_crypt(op);
-
-		nbytes -= ret;
-		err = blkcipher_walk_done(desc, &walk, nbytes);
-	}
-
-	return err;
-}
-
-static int
-geode_cbc_encrypt(struct blkcipher_desc *desc,
-		  struct scatterlist *dst, struct scatterlist *src,
-		  unsigned int nbytes)
-{
-	struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
-	struct blkcipher_walk walk;
-	int err, ret;
-
-	if (nbytes % AES_BLOCK_SIZE)
-		return -EINVAL;
-
-	if (unlikely(op->keylen != AES_KEYSIZE_128))
-		return fallback_blk_enc(desc, dst, src, nbytes);
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	err = blkcipher_walk_virt(desc, &walk);
-	op->iv = walk.iv;
-
-	while ((nbytes = walk.nbytes)) {
-		op->src = walk.src.virt.addr,
-		op->dst = walk.dst.virt.addr;
-		op->mode = AES_MODE_CBC;
-		op->len = nbytes - (nbytes % AES_BLOCK_SIZE);
-		op->dir = AES_DIR_ENCRYPT;
-
-		ret = geode_aes_crypt(op);
-		nbytes -= ret;
-		err = blkcipher_walk_done(desc, &walk, nbytes);
-	}
-
-	return err;
-}
-
-static int fallback_init_blk(struct crypto_tfm *tfm)
+static int geode_init_skcipher(struct crypto_skcipher *tfm)
 {
-	const char *name = crypto_tfm_alg_name(tfm);
-	struct geode_aes_op *op = crypto_tfm_ctx(tfm);
-
-	op->fallback.blk = crypto_alloc_skcipher(name, 0,
-						 CRYPTO_ALG_ASYNC |
-						 CRYPTO_ALG_NEED_FALLBACK);
+	const char *name = crypto_tfm_alg_name(&tfm->base);
+	struct geode_aes_tfm_ctx *tctx = crypto_skcipher_ctx(tfm);
 
-	if (IS_ERR(op->fallback.blk)) {
+	tctx->fallback.skcipher =
+		crypto_alloc_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK |
+				      CRYPTO_ALG_ASYNC);
+	if (IS_ERR(tctx->fallback.skcipher)) {
 		printk(KERN_ERR "Error allocating fallback algo %s\n", name);
-		return PTR_ERR(op->fallback.blk);
+		return PTR_ERR(tctx->fallback.skcipher);
 	}
 
+	crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) +
+				    crypto_skcipher_reqsize(tctx->fallback.skcipher));
 	return 0;
 }
 
-static void fallback_exit_blk(struct crypto_tfm *tfm)
+static void geode_exit_skcipher(struct crypto_skcipher *tfm)
 {
-	struct geode_aes_op *op = crypto_tfm_ctx(tfm);
+	struct geode_aes_tfm_ctx *tctx = crypto_skcipher_ctx(tfm);
 
-	crypto_free_skcipher(op->fallback.blk);
-	op->fallback.blk = NULL;
+	crypto_free_skcipher(tctx->fallback.skcipher);
 }
 
-static struct crypto_alg geode_cbc_alg = {
-	.cra_name		=	"cbc(aes)",
-	.cra_driver_name	=	"cbc-aes-geode",
-	.cra_priority		=	400,
-	.cra_flags			=	CRYPTO_ALG_TYPE_BLKCIPHER |
-						CRYPTO_ALG_KERN_DRIVER_ONLY |
-						CRYPTO_ALG_NEED_FALLBACK,
-	.cra_init			=	fallback_init_blk,
-	.cra_exit			=	fallback_exit_blk,
-	.cra_blocksize		=	AES_BLOCK_SIZE,
-	.cra_ctxsize		=	sizeof(struct geode_aes_op),
-	.cra_alignmask		=	15,
-	.cra_type			=	&crypto_blkcipher_type,
-	.cra_module			=	THIS_MODULE,
-	.cra_u				=	{
-		.blkcipher	=	{
-			.min_keysize	=	AES_MIN_KEY_SIZE,
-			.max_keysize	=	AES_MAX_KEY_SIZE,
-			.setkey			=	geode_setkey_blk,
-			.encrypt		=	geode_cbc_encrypt,
-			.decrypt		=	geode_cbc_decrypt,
-			.ivsize			=	AES_BLOCK_SIZE,
-		}
-	}
-};
-
-static int
-geode_ecb_decrypt(struct blkcipher_desc *desc,
-		  struct scatterlist *dst, struct scatterlist *src,
-		  unsigned int nbytes)
-{
-	struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
-	struct blkcipher_walk walk;
-	int err, ret;
+static int geode_skcipher_crypt(struct skcipher_request *req, int mode, int dir)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	const struct geode_aes_tfm_ctx *tctx = crypto_skcipher_ctx(tfm);
+	struct skcipher_walk walk;
+	unsigned int nbytes;
+	int err;
 
-	if (nbytes % AES_BLOCK_SIZE)
-		return -EINVAL;
+	if (unlikely(tctx->keylen != AES_KEYSIZE_128)) {
+		struct skcipher_request *subreq = skcipher_request_ctx(req);
 
-	if (unlikely(op->keylen != AES_KEYSIZE_128))
-		return fallback_blk_dec(desc, dst, src, nbytes);
+		*subreq = *req;
+		skcipher_request_set_tfm(subreq, tctx->fallback.skcipher);
+		if (dir == AES_DIR_DECRYPT)
+			return crypto_skcipher_decrypt(subreq);
+		else
+			return crypto_skcipher_encrypt(subreq);
+	}
 
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	err = blkcipher_walk_virt(desc, &walk);
+	err = skcipher_walk_virt(&walk, req, false);
 
-	while ((nbytes = walk.nbytes)) {
-		op->src = walk.src.virt.addr,
-		op->dst = walk.dst.virt.addr;
-		op->mode = AES_MODE_ECB;
-		op->len = nbytes - (nbytes % AES_BLOCK_SIZE);
-		op->dir = AES_DIR_DECRYPT;
-
-		ret = geode_aes_crypt(op);
-		nbytes -= ret;
-		err = blkcipher_walk_done(desc, &walk, nbytes);
+	while ((nbytes = walk.nbytes) != 0) {
+		geode_aes_crypt(tctx, walk.src.virt.addr, walk.dst.virt.addr,
+				round_down(nbytes, AES_BLOCK_SIZE),
+				walk.iv, mode, dir);
+		err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
 	}
 
 	return err;
 }
 
-static int
-geode_ecb_encrypt(struct blkcipher_desc *desc,
-		  struct scatterlist *dst, struct scatterlist *src,
-		  unsigned int nbytes)
-{
-	struct geode_aes_op *op = crypto_blkcipher_ctx(desc->tfm);
-	struct blkcipher_walk walk;
-	int err, ret;
-
-	if (nbytes % AES_BLOCK_SIZE)
-		return -EINVAL;
-
-	if (unlikely(op->keylen != AES_KEYSIZE_128))
-		return fallback_blk_enc(desc, dst, src, nbytes);
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-	err = blkcipher_walk_virt(desc, &walk);
-
-	while ((nbytes = walk.nbytes)) {
-		op->src = walk.src.virt.addr,
-		op->dst = walk.dst.virt.addr;
-		op->mode = AES_MODE_ECB;
-		op->len = nbytes - (nbytes % AES_BLOCK_SIZE);
-		op->dir = AES_DIR_ENCRYPT;
-
-		ret = geode_aes_crypt(op);
-		nbytes -= ret;
-		ret =  blkcipher_walk_done(desc, &walk, nbytes);
-	}
+static int geode_cbc_encrypt(struct skcipher_request *req)
+{
+	return geode_skcipher_crypt(req, AES_MODE_CBC, AES_DIR_ENCRYPT);
+}
 
-	return err;
+static int geode_cbc_decrypt(struct skcipher_request *req)
+{
+	return geode_skcipher_crypt(req, AES_MODE_CBC, AES_DIR_DECRYPT);
 }
 
-static struct crypto_alg geode_ecb_alg = {
-	.cra_name			=	"ecb(aes)",
-	.cra_driver_name	=	"ecb-aes-geode",
-	.cra_priority		=	400,
-	.cra_flags			=	CRYPTO_ALG_TYPE_BLKCIPHER |
-						CRYPTO_ALG_KERN_DRIVER_ONLY |
-						CRYPTO_ALG_NEED_FALLBACK,
-	.cra_init			=	fallback_init_blk,
-	.cra_exit			=	fallback_exit_blk,
-	.cra_blocksize		=	AES_BLOCK_SIZE,
-	.cra_ctxsize		=	sizeof(struct geode_aes_op),
-	.cra_alignmask		=	15,
-	.cra_type			=	&crypto_blkcipher_type,
-	.cra_module			=	THIS_MODULE,
-	.cra_u				=	{
-		.blkcipher	=	{
-			.min_keysize	=	AES_MIN_KEY_SIZE,
-			.max_keysize	=	AES_MAX_KEY_SIZE,
-			.setkey			=	geode_setkey_blk,
-			.encrypt		=	geode_ecb_encrypt,
-			.decrypt		=	geode_ecb_decrypt,
-		}
-	}
+static int geode_ecb_encrypt(struct skcipher_request *req)
+{
+	return geode_skcipher_crypt(req, AES_MODE_ECB, AES_DIR_ENCRYPT);
+}
+
+static int geode_ecb_decrypt(struct skcipher_request *req)
+{
+	return geode_skcipher_crypt(req, AES_MODE_ECB, AES_DIR_DECRYPT);
+}
+
+static struct skcipher_alg geode_skcipher_algs[] = {
+	{
+		.base.cra_name		= "cbc(aes)",
+		.base.cra_driver_name	= "cbc-aes-geode",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_KERN_DRIVER_ONLY |
+					  CRYPTO_ALG_NEED_FALLBACK,
+		.base.cra_blocksize	= AES_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct geode_aes_tfm_ctx),
+		.base.cra_alignmask	= 15,
+		.base.cra_module	= THIS_MODULE,
+		.init			= geode_init_skcipher,
+		.exit			= geode_exit_skcipher,
+		.setkey			= geode_setkey_skcipher,
+		.encrypt		= geode_cbc_encrypt,
+		.decrypt		= geode_cbc_decrypt,
+		.min_keysize		= AES_MIN_KEY_SIZE,
+		.max_keysize		= AES_MAX_KEY_SIZE,
+		.ivsize			= AES_BLOCK_SIZE,
+	}, {
+		.base.cra_name		= "ecb(aes)",
+		.base.cra_driver_name	= "ecb-aes-geode",
+		.base.cra_priority	= 400,
+		.base.cra_flags		= CRYPTO_ALG_KERN_DRIVER_ONLY |
+					  CRYPTO_ALG_NEED_FALLBACK,
+		.base.cra_blocksize	= AES_BLOCK_SIZE,
+		.base.cra_ctxsize	= sizeof(struct geode_aes_tfm_ctx),
+		.base.cra_alignmask	= 15,
+		.base.cra_module	= THIS_MODULE,
+		.init			= geode_init_skcipher,
+		.exit			= geode_exit_skcipher,
+		.setkey			= geode_setkey_skcipher,
+		.encrypt		= geode_ecb_encrypt,
+		.decrypt		= geode_ecb_decrypt,
+		.min_keysize		= AES_MIN_KEY_SIZE,
+		.max_keysize		= AES_MAX_KEY_SIZE,
+	},
 };
 
 static void geode_aes_remove(struct pci_dev *dev)
 {
 	crypto_unregister_alg(&geode_alg);
-	crypto_unregister_alg(&geode_ecb_alg);
-	crypto_unregister_alg(&geode_cbc_alg);
+	crypto_unregister_skciphers(geode_skcipher_algs,
+				    ARRAY_SIZE(geode_skcipher_algs));
 
 	pci_iounmap(dev, _iobase);
 	_iobase = NULL;
@@ -553,20 +411,14 @@ static int geode_aes_probe(struct pci_de
 	if (ret)
 		goto eiomap;
 
-	ret = crypto_register_alg(&geode_ecb_alg);
+	ret = crypto_register_skciphers(geode_skcipher_algs,
+					ARRAY_SIZE(geode_skcipher_algs));
 	if (ret)
 		goto ealg;
 
-	ret = crypto_register_alg(&geode_cbc_alg);
-	if (ret)
-		goto eecb;
-
 	dev_notice(&dev->dev, "GEODE AES engine enabled.\n");
 	return 0;
 
- eecb:
-	crypto_unregister_alg(&geode_ecb_alg);
-
  ealg:
 	crypto_unregister_alg(&geode_alg);
 
--- a/drivers/crypto/geode-aes.h
+++ b/drivers/crypto/geode-aes.h
@@ -50,21 +50,10 @@
 
 #define AES_OP_TIMEOUT    0x50000
 
-struct geode_aes_op {
-
-	void *src;
-	void *dst;
-
-	u32 mode;
-	u32 dir;
-	u32 flags;
-	int len;
-
+struct geode_aes_tfm_ctx {
 	u8 key[AES_KEYSIZE_128];
-	u8 *iv;
-
 	union {
-		struct crypto_skcipher *blk;
+		struct crypto_skcipher *skcipher;
 		struct crypto_cipher *cip;
 	} fallback;
 	u32 keylen;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 069/195] PCI: keystone: Fix link training retries initiation
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (67 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 068/195] crypto: geode-aes - convert to skcipher API and make thread-safe Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 070/195] mmc: sdhci-of-at91: fix memleak on clk_get failure Greg Kroah-Hartman
                   ` (129 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Yurii Monakov, Lorenzo Pieralisi,
	Andrew Murray, Sasha Levin

From: Yurii Monakov <monakov.y@gmail.com>

[ Upstream commit 6df19872d881641e6394f93ef2938cffcbdae5bb ]

ks_pcie_stop_link() function does not clear LTSSM_EN_VAL bit so
link training was not triggered more than once after startup.
In configurations where link can be unstable during early boot,
for example, under low temperature, it will never be established.

Fixes: 0c4ffcfe1fbc ("PCI: keystone: Add TI Keystone PCIe driver")
Signed-off-by: Yurii Monakov <monakov.y@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Andrew Murray <andrew.murray@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/pci/controller/dwc/pci-keystone-dw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-keystone-dw.c b/drivers/pci/controller/dwc/pci-keystone-dw.c
index 0682213328e93..15c612e853afb 100644
--- a/drivers/pci/controller/dwc/pci-keystone-dw.c
+++ b/drivers/pci/controller/dwc/pci-keystone-dw.c
@@ -425,7 +425,7 @@ void ks_dw_pcie_initiate_link_train(struct keystone_pcie *ks_pcie)
 	/* Disable Link training */
 	val = ks_dw_app_readl(ks_pcie, CMD_STATUS);
 	val &= ~LTSSM_EN_VAL;
-	ks_dw_app_writel(ks_pcie, CMD_STATUS, LTSSM_EN_VAL | val);
+	ks_dw_app_writel(ks_pcie, CMD_STATUS, val);
 
 	/* Initiate Link Training */
 	val = ks_dw_app_readl(ks_pcie, CMD_STATUS);
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 070/195] mmc: sdhci-of-at91: fix memleak on clk_get failure
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (68 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 069/195] PCI: keystone: Fix link training retries initiation Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 071/195] hv_balloon: Balloon up according to request page number Greg Kroah-Hartman
                   ` (128 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Michał Mirosław,
	Ludovic Desroches, Adrian Hunter, Ulf Hansson, Sasha Levin

From: Michał Mirosław <mirq-linux@rere.qmqm.pl>

[ Upstream commit a04184ce777b46e92c2b3c93c6dcb2754cb005e1 ]

sdhci_alloc_host() does its work not using managed infrastructure, so
needs explicit free on error path. Add it where needed.

Cc: <stable@vger.kernel.org>
Fixes: bb5f8ea4d514 ("mmc: sdhci-of-at91: introduce driver for the Atmel SDMMC")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/b2a44d5be2e06ff075f32477e466598bb0f07b36.1577961679.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/mmc/host/sdhci-of-at91.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c
index 1ebcf0eb781ea..04e88d4796fa9 100644
--- a/drivers/mmc/host/sdhci-of-at91.c
+++ b/drivers/mmc/host/sdhci-of-at91.c
@@ -332,19 +332,22 @@ static int sdhci_at91_probe(struct platform_device *pdev)
 	priv->mainck = devm_clk_get(&pdev->dev, "baseclk");
 	if (IS_ERR(priv->mainck)) {
 		dev_err(&pdev->dev, "failed to get baseclk\n");
-		return PTR_ERR(priv->mainck);
+		ret = PTR_ERR(priv->mainck);
+		goto sdhci_pltfm_free;
 	}
 
 	priv->hclock = devm_clk_get(&pdev->dev, "hclock");
 	if (IS_ERR(priv->hclock)) {
 		dev_err(&pdev->dev, "failed to get hclock\n");
-		return PTR_ERR(priv->hclock);
+		ret = PTR_ERR(priv->hclock);
+		goto sdhci_pltfm_free;
 	}
 
 	priv->gck = devm_clk_get(&pdev->dev, "multclk");
 	if (IS_ERR(priv->gck)) {
 		dev_err(&pdev->dev, "failed to get multclk\n");
-		return PTR_ERR(priv->gck);
+		ret = PTR_ERR(priv->gck);
+		goto sdhci_pltfm_free;
 	}
 
 	ret = sdhci_at91_set_clks_presets(&pdev->dev);
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 071/195] hv_balloon: Balloon up according to request page number
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (69 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 070/195] mmc: sdhci-of-at91: fix memleak on clk_get failure Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 072/195] mfd: axp20x: Mark AXP20X_VBUS_IPSOUT_MGMT as volatile Greg Kroah-Hartman
                   ` (127 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Vitaly Kuznetsov, Tianyu Lan,
	Michael Kelley, Sasha Levin

From: Tianyu Lan <Tianyu.Lan@microsoft.com>

commit d33c240d47dab4fd15123d9e73fc8810cbc6ed6a upstream.

Current code has assumption that balloon request memory size aligns
with 2MB. But actually Hyper-V doesn't guarantee such alignment. When
balloon driver receives non-aligned balloon request, it produces warning
and balloon up more memory than requested in order to keep 2MB alignment.
Remove the warning and balloon up memory according to actual requested
memory size.

Fixes: f6712238471a ("hv: hv_balloon: avoid memory leak on alloc_error of 2MB memory block")
Cc: stable@vger.kernel.org
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hv/hv_balloon.c |   13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -1215,10 +1215,7 @@ static unsigned int alloc_balloon_pages(
 	unsigned int i = 0;
 	struct page *pg;
 
-	if (num_pages < alloc_unit)
-		return 0;
-
-	for (i = 0; (i * alloc_unit) < num_pages; i++) {
+	for (i = 0; i < num_pages / alloc_unit; i++) {
 		if (bl_resp->hdr.size + sizeof(union dm_mem_page_range) >
 			PAGE_SIZE)
 			return i * alloc_unit;
@@ -1252,7 +1249,7 @@ static unsigned int alloc_balloon_pages(
 
 	}
 
-	return num_pages;
+	return i * alloc_unit;
 }
 
 static void balloon_up(struct work_struct *dummy)
@@ -1267,9 +1264,6 @@ static void balloon_up(struct work_struc
 	long avail_pages;
 	unsigned long floor;
 
-	/* The host balloons pages in 2M granularity. */
-	WARN_ON_ONCE(num_pages % PAGES_IN_2M != 0);
-
 	/*
 	 * We will attempt 2M allocations. However, if we fail to
 	 * allocate 2M chunks, we will go back to 4k allocations.
@@ -1279,14 +1273,13 @@ static void balloon_up(struct work_struc
 	avail_pages = si_mem_available();
 	floor = compute_balloon_floor();
 
-	/* Refuse to balloon below the floor, keep the 2M granularity. */
+	/* Refuse to balloon below the floor. */
 	if (avail_pages < num_pages || avail_pages - num_pages < floor) {
 		pr_warn("Balloon request will be partially fulfilled. %s\n",
 			avail_pages < num_pages ? "Not enough memory." :
 			"Balloon floor reached.");
 
 		num_pages = avail_pages > floor ? (avail_pages - floor) : 0;
-		num_pages -= num_pages % PAGES_IN_2M;
 	}
 
 	while (!done) {



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 072/195] mfd: axp20x: Mark AXP20X_VBUS_IPSOUT_MGMT as volatile
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (70 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 071/195] hv_balloon: Balloon up according to request page number Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 073/195] crypto: api - Check spawn->alg under lock in crypto_drop_spawn Greg Kroah-Hartman
                   ` (126 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Samuel Holland, Chen-Yu Tsai, Lee Jones

From: Samuel Holland <samuel@sholland.org>

commit dc91c3b6fe66a13ac76f6cb3b2100c0779cd3350 upstream.

On AXP288 and newer PMICs, bit 7 of AXP20X_VBUS_IPSOUT_MGMT can be set
to prevent using the VBUS input. However, when the VBUS unplugged and
plugged back in, the bit automatically resets to zero.

We need to set the register as volatile to prevent regmap from caching
that bit. Otherwise, regcache will think the bit is already set and not
write the register.

Fixes: cd53216625a0 ("mfd: axp20x: Fix axp288 volatile ranges")
Cc: stable@vger.kernel.org
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mfd/axp20x.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mfd/axp20x.c
+++ b/drivers/mfd/axp20x.c
@@ -128,7 +128,7 @@ static const struct regmap_range axp288_
 static const struct regmap_range axp288_volatile_ranges[] = {
 	regmap_reg_range(AXP20X_PWR_INPUT_STATUS, AXP288_POWER_REASON),
 	regmap_reg_range(AXP288_BC_GLOBAL, AXP288_BC_GLOBAL),
-	regmap_reg_range(AXP288_BC_DET_STAT, AXP288_BC_DET_STAT),
+	regmap_reg_range(AXP288_BC_DET_STAT, AXP20X_VBUS_IPSOUT_MGMT),
 	regmap_reg_range(AXP20X_CHRG_BAK_CTRL, AXP20X_CHRG_BAK_CTRL),
 	regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IPSOUT_V_HIGH_L),
 	regmap_reg_range(AXP20X_TIMER_CTRL, AXP20X_TIMER_CTRL),



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 073/195] crypto: api - Check spawn->alg under lock in crypto_drop_spawn
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (71 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 072/195] mfd: axp20x: Mark AXP20X_VBUS_IPSOUT_MGMT as volatile Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 074/195] crypto: ccree - fix backlog memory leak Greg Kroah-Hartman
                   ` (125 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Herbert Xu

From: Herbert Xu <herbert@gondor.apana.org.au>

commit 7db3b61b6bba4310f454588c2ca6faf2958ad79f upstream.

We need to check whether spawn->alg is NULL under lock as otherwise
the algorithm could be removed from under us after we have checked
it and found it to be non-NULL.  This could cause us to remove the
spawn from a non-existent list.

Fixes: 7ede5a5ba55a ("crypto: api - Fix crypto_drop_spawn crash...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 crypto/algapi.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -649,11 +649,9 @@ EXPORT_SYMBOL_GPL(crypto_grab_spawn);
 
 void crypto_drop_spawn(struct crypto_spawn *spawn)
 {
-	if (!spawn->alg)
-		return;
-
 	down_write(&crypto_alg_sem);
-	list_del(&spawn->list);
+	if (spawn->alg)
+		list_del(&spawn->list);
 	up_write(&crypto_alg_sem);
 }
 EXPORT_SYMBOL_GPL(crypto_drop_spawn);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 074/195] crypto: ccree - fix backlog memory leak
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (72 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 073/195] crypto: api - Check spawn->alg under lock in crypto_drop_spawn Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 075/195] crypto: ccree - fix pm wrongful error reporting Greg Kroah-Hartman
                   ` (124 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Gilad Ben-Yossef, Herbert Xu

From: Gilad Ben-Yossef <gilad@benyossef.com>

commit 4df2ef25b3b3618fd708ab484fe6239abd130fec upstream.

Fix brown paper bag bug of not releasing backlog list item buffer
when backlog was consumed causing a memory leak when backlog is
used.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/ccree/cc_request_mgr.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/crypto/ccree/cc_request_mgr.c
+++ b/drivers/crypto/ccree/cc_request_mgr.c
@@ -403,6 +403,7 @@ static void cc_proc_backlog(struct cc_dr
 		spin_lock(&mgr->bl_lock);
 		list_del(&bli->list);
 		--mgr->bl_len;
+		kfree(bli);
 	}
 
 	spin_unlock(&mgr->bl_lock);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 075/195] crypto: ccree - fix pm wrongful error reporting
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (73 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 074/195] crypto: ccree - fix backlog memory leak Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 076/195] crypto: ccree - fix PM race condition Greg Kroah-Hartman
                   ` (123 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Gilad Ben-Yossef, Herbert Xu

From: Gilad Ben-Yossef <gilad@benyossef.com>

commit cedca59fae5834af8445b403c66c9953754375d7 upstream.

pm_runtime_get_sync() can return 1 as a valid (none error) return
code. Treat it as such.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/ccree/cc_pm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/crypto/ccree/cc_pm.c
+++ b/drivers/crypto/ccree/cc_pm.c
@@ -82,7 +82,7 @@ int cc_pm_get(struct device *dev)
 	else
 		pm_runtime_get_noresume(dev);
 
-	return rc;
+	return (rc == 1 ? 0 : rc);
 }
 
 int cc_pm_put_suspend(struct device *dev)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 076/195] crypto: ccree - fix PM race condition
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (74 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 075/195] crypto: ccree - fix pm wrongful error reporting Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 077/195] scripts/find-unused-docs: Fix massive false positives Greg Kroah-Hartman
                   ` (122 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Gilad Ben-Yossef, Herbert Xu, stable

From: Gilad Ben-Yossef <gilad@benyossef.com>

commit 15fd2566bf54ee4d4781d8f170acfc9472a1541f upstream.

The PM code was racy, possibly causing the driver to submit
requests to a powered down device. Fix the race and while
at it simplify the PM code.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Fixes: 1358c13a48c4 ("crypto: ccree - fix resume race condition on init")
Cc: stable@kernel.org # v4.20
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/ccree/cc_driver.h      |    1 
 drivers/crypto/ccree/cc_pm.c          |   28 ++++---------------
 drivers/crypto/ccree/cc_request_mgr.c |   50 ----------------------------------
 drivers/crypto/ccree/cc_request_mgr.h |    8 -----
 4 files changed, 7 insertions(+), 80 deletions(-)

--- a/drivers/crypto/ccree/cc_driver.h
+++ b/drivers/crypto/ccree/cc_driver.h
@@ -131,6 +131,7 @@ struct cc_drvdata {
 	u32 axim_mon_offset;
 	u32 sig_offset;
 	u32 ver_offset;
+	bool pm_on;
 };
 
 struct cc_crypto_alg {
--- a/drivers/crypto/ccree/cc_pm.c
+++ b/drivers/crypto/ccree/cc_pm.c
@@ -23,14 +23,8 @@ const struct dev_pm_ops ccree_pm = {
 int cc_pm_suspend(struct device *dev)
 {
 	struct cc_drvdata *drvdata = dev_get_drvdata(dev);
-	int rc;
 
 	dev_dbg(dev, "set HOST_POWER_DOWN_EN\n");
-	rc = cc_suspend_req_queue(drvdata);
-	if (rc) {
-		dev_err(dev, "cc_suspend_req_queue (%x)\n", rc);
-		return rc;
-	}
 	fini_cc_regs(drvdata);
 	cc_iowrite(drvdata, CC_REG(HOST_POWER_DOWN_EN), POWER_DOWN_ENABLE);
 	cc_clk_off(drvdata);
@@ -59,13 +53,6 @@ int cc_pm_resume(struct device *dev)
 	/* check if tee fips error occurred during power down */
 	cc_tee_handle_fips_error(drvdata);
 
-	rc = cc_resume_req_queue(drvdata);
-	if (rc) {
-		dev_err(dev, "cc_resume_req_queue (%x)\n", rc);
-		return rc;
-	}
-
-	/* must be after the queue resuming as it uses the HW queue*/
 	cc_init_hash_sram(drvdata);
 
 	cc_init_iv_sram(drvdata);
@@ -77,10 +64,8 @@ int cc_pm_get(struct device *dev)
 	int rc = 0;
 	struct cc_drvdata *drvdata = dev_get_drvdata(dev);
 
-	if (cc_req_queue_suspended(drvdata))
+	if (drvdata->pm_on)
 		rc = pm_runtime_get_sync(dev);
-	else
-		pm_runtime_get_noresume(dev);
 
 	return (rc == 1 ? 0 : rc);
 }
@@ -90,14 +75,11 @@ int cc_pm_put_suspend(struct device *dev
 	int rc = 0;
 	struct cc_drvdata *drvdata = dev_get_drvdata(dev);
 
-	if (!cc_req_queue_suspended(drvdata)) {
+	if (drvdata->pm_on) {
 		pm_runtime_mark_last_busy(dev);
 		rc = pm_runtime_put_autosuspend(dev);
-	} else {
-		/* Something wrong happens*/
-		dev_err(dev, "request to suspend already suspended queue");
-		rc = -EBUSY;
 	}
+
 	return rc;
 }
 
@@ -108,7 +90,7 @@ int cc_pm_init(struct cc_drvdata *drvdat
 	/* must be before the enabling to avoid resdundent suspending */
 	pm_runtime_set_autosuspend_delay(dev, CC_SUSPEND_TIMEOUT);
 	pm_runtime_use_autosuspend(dev);
-	/* activate the PM module */
+	/* set us as active - note we won't do PM ops until cc_pm_go()! */
 	return pm_runtime_set_active(dev);
 }
 
@@ -116,9 +98,11 @@ int cc_pm_init(struct cc_drvdata *drvdat
 void cc_pm_go(struct cc_drvdata *drvdata)
 {
 	pm_runtime_enable(drvdata_to_dev(drvdata));
+	drvdata->pm_on = true;
 }
 
 void cc_pm_fini(struct cc_drvdata *drvdata)
 {
 	pm_runtime_disable(drvdata_to_dev(drvdata));
+	drvdata->pm_on = false;
 }
--- a/drivers/crypto/ccree/cc_request_mgr.c
+++ b/drivers/crypto/ccree/cc_request_mgr.c
@@ -41,7 +41,6 @@ struct cc_req_mgr_handle {
 #else
 	struct tasklet_struct comptask;
 #endif
-	bool is_runtime_suspended;
 };
 
 struct cc_bl_item {
@@ -661,52 +660,3 @@ static void comp_handler(unsigned long d
 
 	cc_proc_backlog(drvdata);
 }
-
-/*
- * resume the queue configuration - no need to take the lock as this happens
- * inside the spin lock protection
- */
-#if defined(CONFIG_PM)
-int cc_resume_req_queue(struct cc_drvdata *drvdata)
-{
-	struct cc_req_mgr_handle *request_mgr_handle =
-		drvdata->request_mgr_handle;
-
-	spin_lock_bh(&request_mgr_handle->hw_lock);
-	request_mgr_handle->is_runtime_suspended = false;
-	spin_unlock_bh(&request_mgr_handle->hw_lock);
-
-	return 0;
-}
-
-/*
- * suspend the queue configuration. Since it is used for the runtime suspend
- * only verify that the queue can be suspended.
- */
-int cc_suspend_req_queue(struct cc_drvdata *drvdata)
-{
-	struct cc_req_mgr_handle *request_mgr_handle =
-						drvdata->request_mgr_handle;
-
-	/* lock the send_request */
-	spin_lock_bh(&request_mgr_handle->hw_lock);
-	if (request_mgr_handle->req_queue_head !=
-	    request_mgr_handle->req_queue_tail) {
-		spin_unlock_bh(&request_mgr_handle->hw_lock);
-		return -EBUSY;
-	}
-	request_mgr_handle->is_runtime_suspended = true;
-	spin_unlock_bh(&request_mgr_handle->hw_lock);
-
-	return 0;
-}
-
-bool cc_req_queue_suspended(struct cc_drvdata *drvdata)
-{
-	struct cc_req_mgr_handle *request_mgr_handle =
-						drvdata->request_mgr_handle;
-
-	return	request_mgr_handle->is_runtime_suspended;
-}
-
-#endif
--- a/drivers/crypto/ccree/cc_request_mgr.h
+++ b/drivers/crypto/ccree/cc_request_mgr.h
@@ -40,12 +40,4 @@ void complete_request(struct cc_drvdata
 
 void cc_req_mgr_fini(struct cc_drvdata *drvdata);
 
-#if defined(CONFIG_PM)
-int cc_resume_req_queue(struct cc_drvdata *drvdata);
-
-int cc_suspend_req_queue(struct cc_drvdata *drvdata);
-
-bool cc_req_queue_suspended(struct cc_drvdata *drvdata);
-#endif
-
 #endif /*__REQUEST_MGR_H__*/



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 077/195] scripts/find-unused-docs: Fix massive false positives
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (75 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 076/195] crypto: ccree - fix PM race condition Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 078/195] scsi: qla2xxx: Fix mtcp dump collection failure Greg Kroah-Hartman
                   ` (121 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Geert Uytterhoeven, Jonathan Corbet

From: Geert Uytterhoeven <geert+renesas@glider.be>

commit 1630146db2111412e7524d05d812ff8f2c75977e upstream.

scripts/find-unused-docs.sh invokes scripts/kernel-doc to find out if a
source file contains kerneldoc or not.

However, as it passes the no longer supported "-text" option to
scripts/kernel-doc, the latter prints out its help text, causing all
files to be considered containing kerneldoc.

Get rid of these false positives by removing the no longer supported
"-text" option from the scripts/kernel-doc invocation.

Cc: stable@vger.kernel.org  # 4.16+
Fixes: b05142675310d2ac ("scripts: kernel-doc: get rid of unused output formats")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200127093107.26401-1-geert+renesas@glider.be
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 scripts/find-unused-docs.sh |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/scripts/find-unused-docs.sh
+++ b/scripts/find-unused-docs.sh
@@ -54,7 +54,7 @@ for file in `find $1 -name '*.c'`; do
 	if [[ ${FILES_INCLUDED[$file]+_} ]]; then
 	continue;
 	fi
-	str=$(scripts/kernel-doc -text -export "$file" 2>/dev/null)
+	str=$(scripts/kernel-doc -export "$file" 2>/dev/null)
 	if [[ -n "$str" ]]; then
 	echo "$file"
 	fi



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 078/195] scsi: qla2xxx: Fix mtcp dump collection failure
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (76 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 077/195] scripts/find-unused-docs: Fix massive false positives Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 079/195] power: supply: ltc2941-battery-gauge: fix use-after-free Greg Kroah-Hartman
                   ` (120 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Quinn Tran, Himanshu Madhani,
	Martin K. Petersen

From: Quinn Tran <qutran@marvell.com>

commit 641e0efddcbde52461e017136acd3ce7f2ef0c14 upstream.

MTCP dump failed due to MB Reg 10 was picking garbage data from stack
memory.

Fixes: 81178772b636a ("[SCSI] qla2xxx: Implemetation of mctp.")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20191217220617.28084-14-hmadhani@marvell.com
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_mbx.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -5994,9 +5994,8 @@ qla2x00_dump_mctp_data(scsi_qla_host_t *
 	mcp->mb[7] = LSW(MSD(req_dma));
 	mcp->mb[8] = MSW(addr);
 	/* Setting RAM ID to valid */
-	mcp->mb[10] |= BIT_7;
 	/* For MCTP RAM ID is 0x40 */
-	mcp->mb[10] |= 0x40;
+	mcp->mb[10] = BIT_7 | 0x40;
 
 	mcp->out_mb |= MBX_10|MBX_8|MBX_7|MBX_6|MBX_5|MBX_4|MBX_3|MBX_2|MBX_1|
 	    MBX_0;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 079/195] power: supply: ltc2941-battery-gauge: fix use-after-free
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (77 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 078/195] scsi: qla2xxx: Fix mtcp dump collection failure Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 080/195] ovl: fix wrong WARN_ON() in ovl_cache_update_ino() Greg Kroah-Hartman
                   ` (119 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Sven Van Asbroeck, Sebastian Reichel

From: Sven Van Asbroeck <thesven73@gmail.com>

commit a60ec78d306c6548d4adbc7918b587a723c555cc upstream.

This driver's remove path calls cancel_delayed_work().
However, that function does not wait until the work function
finishes. This could mean that the work function is still
running after the driver's remove function has finished,
which would result in a use-after-free.

Fix by calling cancel_delayed_work_sync(), which ensures that
that the work is properly cancelled, no longer running, and
unable to re-schedule itself.

This issue was detected with the help of Coccinelle.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/power/supply/ltc2941-battery-gauge.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/power/supply/ltc2941-battery-gauge.c
+++ b/drivers/power/supply/ltc2941-battery-gauge.c
@@ -448,7 +448,7 @@ static int ltc294x_i2c_remove(struct i2c
 {
 	struct ltc294x_info *info = i2c_get_clientdata(client);
 
-	cancel_delayed_work(&info->work);
+	cancel_delayed_work_sync(&info->work);
 	power_supply_unregister(info->supply);
 	return 0;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 080/195] ovl: fix wrong WARN_ON() in ovl_cache_update_ino()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (78 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 079/195] power: supply: ltc2941-battery-gauge: fix use-after-free Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 081/195] f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project() Greg Kroah-Hartman
                   ` (118 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Amir Goldstein, Miklos Szeredi

From: Amir Goldstein <amir73il@gmail.com>

commit 4c37e71b713ecffe81f8e6273c6835e54306d412 upstream.

The WARN_ON() that child entry is always on overlay st_dev became wrong
when we allowed this function to update d_ino in non-samefs setup with xino
enabled.

It is not true in case of xino bits overflow on a non-dir inode.  Leave the
WARN_ON() only for directories, where assertion is still true.

Fixes: adbf4f7ea834 ("ovl: consistent d_ino for non-samefs with xino")
Cc: <stable@vger.kernel.org> # v4.17+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/overlayfs/readdir.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -507,7 +507,13 @@ get:
 		if (err)
 			goto fail;
 
-		WARN_ON_ONCE(dir->d_sb->s_dev != stat.dev);
+		/*
+		 * Directory inode is always on overlay st_dev.
+		 * Non-dir with ovl_same_dev() could be on pseudo st_dev in case
+		 * of xino bits overflow.
+		 */
+		WARN_ON_ONCE(S_ISDIR(stat.mode) &&
+			     dir->d_sb->s_dev != stat.dev);
 		ino = stat.ino;
 	} else if (xinobits && !OVL_TYPE_UPPER(type)) {
 		ino = ovl_remap_lower_ino(ino, xinobits,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 081/195] f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (79 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 080/195] ovl: fix wrong WARN_ON() in ovl_cache_update_ino() Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 082/195] f2fs: fix miscounted block limit " Greg Kroah-Hartman
                   ` (117 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable

From: Chengguang Xu <cgxu519@mykernel.net>

commit 909110c060f22e65756659ec6fa957ae75777e00 upstream.

Setting softlimit larger than hardlimit seems meaningless
for disk quota but currently it is allowed. In this case,
there may be a bit of comfusion for users when they run
df comamnd to directory which has project quota.

For example, we set 20M softlimit and 10M hardlimit of
block usage limit for project quota of test_dir(project id 123).

[root@hades f2fs]# repquota -P -a
---
 fs/f2fs/super.c |   20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1148,9 +1148,13 @@ static int f2fs_statfs_project(struct su
 		return PTR_ERR(dquot);
 	spin_lock(&dquot->dq_dqb_lock);
 
-	limit = (dquot->dq_dqb.dqb_bsoftlimit ?
-		 dquot->dq_dqb.dqb_bsoftlimit :
-		 dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
+	limit = 0;
+	if (dquot->dq_dqb.dqb_bsoftlimit)
+		limit = dquot->dq_dqb.dqb_bsoftlimit;
+	if (dquot->dq_dqb.dqb_bhardlimit &&
+			(!limit || dquot->dq_dqb.dqb_bhardlimit < limit))
+		limit = dquot->dq_dqb.dqb_bhardlimit;
+
 	if (limit && buf->f_blocks > limit) {
 		curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
 		buf->f_blocks = limit;
@@ -1159,9 +1163,13 @@ static int f2fs_statfs_project(struct su
 			 (buf->f_blocks - curblock) : 0;
 	}
 
-	limit = dquot->dq_dqb.dqb_isoftlimit ?
-		dquot->dq_dqb.dqb_isoftlimit :
-		dquot->dq_dqb.dqb_ihardlimit;
+	limit = 0;
+	if (dquot->dq_dqb.dqb_isoftlimit)
+		limit = dquot->dq_dqb.dqb_isoftlimit;
+	if (dquot->dq_dqb.dqb_ihardlimit &&
+			(!limit || dquot->dq_dqb.dqb_ihardlimit < limit))
+		limit = dquot->dq_dqb.dqb_ihardlimit;
+
 	if (limit && buf->f_files > limit) {
 		buf->f_files = limit;
 		buf->f_ffree =



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 082/195] f2fs: fix miscounted block limit in f2fs_statfs_project()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (80 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 081/195] f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project() Greg Kroah-Hartman
@ 2020-02-10 12:32 ` " Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 083/195] f2fs: code cleanup for f2fs_statfs_project() Greg Kroah-Hartman
                   ` (116 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable

From: Chengguang Xu <cgxu519@mykernel.net>

commit acdf2172172a511f97fa21ed0ee7609a6d3b3a07 upstream.

statfs calculates Total/Used/Avail disk space in block unit,
so we should translate soft/hard prjquota limit to block unit
as well.

Below testing result shows the block/inode numbers of
Total/Used/Avail from df command are all correct afer
applying this patch.

[root@localhost quota-tools]\# ./repquota -P /dev/sdb1
---
 fs/f2fs/super.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1154,6 +1154,8 @@ static int f2fs_statfs_project(struct su
 	if (dquot->dq_dqb.dqb_bhardlimit &&
 			(!limit || dquot->dq_dqb.dqb_bhardlimit < limit))
 		limit = dquot->dq_dqb.dqb_bhardlimit;
+	if (limit)
+		limit >>= sb->s_blocksize_bits;
 
 	if (limit && buf->f_blocks > limit) {
 		curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 083/195] f2fs: code cleanup for f2fs_statfs_project()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (81 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 082/195] f2fs: fix miscounted block limit " Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 084/195] PM: core: Fix handling of devices deleted during system-wide resume Greg Kroah-Hartman
                   ` (115 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Chengguang Xu, Chao Yu, Jaegeuk Kim

From: Chengguang Xu <cgxu519@mykernel.net>

commit bf2cbd3c57159c2b639ee8797b52ab5af180bf83 upstream.

Calling min_not_zero() to simplify complicated prjquota
limit comparison in f2fs_statfs_project().

Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/f2fs/super.c |   16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1148,12 +1148,8 @@ static int f2fs_statfs_project(struct su
 		return PTR_ERR(dquot);
 	spin_lock(&dquot->dq_dqb_lock);
 
-	limit = 0;
-	if (dquot->dq_dqb.dqb_bsoftlimit)
-		limit = dquot->dq_dqb.dqb_bsoftlimit;
-	if (dquot->dq_dqb.dqb_bhardlimit &&
-			(!limit || dquot->dq_dqb.dqb_bhardlimit < limit))
-		limit = dquot->dq_dqb.dqb_bhardlimit;
+	limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
+					dquot->dq_dqb.dqb_bhardlimit);
 	if (limit)
 		limit >>= sb->s_blocksize_bits;
 
@@ -1165,12 +1161,8 @@ static int f2fs_statfs_project(struct su
 			 (buf->f_blocks - curblock) : 0;
 	}
 
-	limit = 0;
-	if (dquot->dq_dqb.dqb_isoftlimit)
-		limit = dquot->dq_dqb.dqb_isoftlimit;
-	if (dquot->dq_dqb.dqb_ihardlimit &&
-			(!limit || dquot->dq_dqb.dqb_ihardlimit < limit))
-		limit = dquot->dq_dqb.dqb_ihardlimit;
+	limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
+					dquot->dq_dqb.dqb_ihardlimit);
 
 	if (limit && buf->f_files > limit) {
 		buf->f_files = limit;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 084/195] PM: core: Fix handling of devices deleted during system-wide resume
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (82 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 083/195] f2fs: code cleanup for f2fs_statfs_project() Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 085/195] of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc Greg Kroah-Hartman
                   ` (114 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Chanho Min, Rafael J. Wysocki

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

commit 0552e05fdfea191a2cf3a0abd33574b5ef9ca818 upstream.

If a device is deleted by one of its system-wide resume callbacks
(for example, because it does not appear to be present or accessible
any more) along with its children, the resume of the children may
continue leading to use-after-free errors and other issues
(potentially).

Namely, if the device's children are resumed asynchronously, their
resume may have been scheduled already before the device's callback
runs and so the device may be deleted while dpm_wait_for_superior()
is being executed for them.  The memory taken up by the parent device
object may be freed then while dpm_wait() is waiting for the parent's
resume callback to complete, which leads to a use-after-free.
Moreover, the resume of the children is really not expected to
continue after they have been unregistered, so it must be terminated
right away in that case.

To address this problem, modify dpm_wait_for_superior() to check
if the target device is still there in the system-wide PM list of
devices and if so, to increment its parent's reference counter, both
under dpm_list_mtx which prevents device_del() running for the child
from dropping the parent's reference counter prematurely.

If the device is not present in the system-wide PM list of devices
any more, the resume of it cannot continue, so check that again after
dpm_wait() returns, which means that the parent's callback has been
completed, and pass the result of that check to the caller of
dpm_wait_for_superior() to allow it to abort the device's resume
if it is not there any more.

Link: https://lore.kernel.org/linux-pm/1579568452-27253-1-git-send-email-chanho.min@lge.com
Reported-by: Chanho Min <chanho.min@lge.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/base/power/main.c |   42 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 37 insertions(+), 5 deletions(-)

--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -265,10 +265,38 @@ static void dpm_wait_for_suppliers(struc
 	device_links_read_unlock(idx);
 }
 
-static void dpm_wait_for_superior(struct device *dev, bool async)
+static bool dpm_wait_for_superior(struct device *dev, bool async)
 {
-	dpm_wait(dev->parent, async);
+	struct device *parent;
+
+	/*
+	 * If the device is resumed asynchronously and the parent's callback
+	 * deletes both the device and the parent itself, the parent object may
+	 * be freed while this function is running, so avoid that by reference
+	 * counting the parent once more unless the device has been deleted
+	 * already (in which case return right away).
+	 */
+	mutex_lock(&dpm_list_mtx);
+
+	if (!device_pm_initialized(dev)) {
+		mutex_unlock(&dpm_list_mtx);
+		return false;
+	}
+
+	parent = get_device(dev->parent);
+
+	mutex_unlock(&dpm_list_mtx);
+
+	dpm_wait(parent, async);
+	put_device(parent);
+
 	dpm_wait_for_suppliers(dev, async);
+
+	/*
+	 * If the parent's callback has deleted the device, attempting to resume
+	 * it would be invalid, so avoid doing that then.
+	 */
+	return device_pm_initialized(dev);
 }
 
 static void dpm_wait_for_consumers(struct device *dev, bool async)
@@ -628,7 +656,8 @@ static int device_resume_noirq(struct de
 	if (!dev->power.is_noirq_suspended)
 		goto Out;
 
-	dpm_wait_for_superior(dev, async);
+	if (!dpm_wait_for_superior(dev, async))
+		goto Out;
 
 	skip_resume = dev_pm_may_skip_resume(dev);
 
@@ -829,7 +858,8 @@ static int device_resume_early(struct de
 	if (!dev->power.is_late_suspended)
 		goto Out;
 
-	dpm_wait_for_superior(dev, async);
+	if (!dpm_wait_for_superior(dev, async))
+		goto Out;
 
 	callback = dpm_subsys_resume_early_cb(dev, state, &info);
 
@@ -949,7 +979,9 @@ static int device_resume(struct device *
 		goto Complete;
 	}
 
-	dpm_wait_for_superior(dev, async);
+	if (!dpm_wait_for_superior(dev, async))
+		goto Complete;
+
 	dpm_watchdog_set(&wd, dev);
 	device_lock(dev);
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 085/195] of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (83 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 084/195] PM: core: Fix handling of devices deleted during system-wide resume Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 086/195] dm zoned: support zone sizes smaller than 128MiB Greg Kroah-Hartman
                   ` (113 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Christian Zigotzky, Michael Ellerman,
	Ulf Hansson, Rob Herring

From: Michael Ellerman <mpe@ellerman.id.au>

commit dabf6b36b83a18d57e3d4b9d50544ed040d86255 upstream.

There's an OF helper called of_dma_is_coherent(), which checks if a
device has a "dma-coherent" property to see if the device is coherent
for DMA.

But on some platforms devices are coherent by default, and on some
platforms it's not possible to update existing device trees to add the
"dma-coherent" property.

So add a Kconfig symbol to allow arch code to tell
of_dma_is_coherent() that devices are coherent by default, regardless
of the presence of the property.

Select that symbol on powerpc when NOT_COHERENT_CACHE is not set, ie.
when the system has a coherent cache.

Fixes: 92ea637edea3 ("of: introduce of_dma_is_coherent() helper")
Cc: stable@vger.kernel.org # v3.16+
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/Kconfig |    1 +
 drivers/of/Kconfig   |    4 ++++
 drivers/of/address.c |    6 +++++-
 3 files changed, 10 insertions(+), 1 deletion(-)

--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -230,6 +230,7 @@ config PPC
 	select NEED_SG_DMA_LENGTH
 	select NO_BOOTMEM
 	select OF
+	select OF_DMA_DEFAULT_COHERENT		if !NOT_COHERENT_CACHE
 	select OF_EARLY_FLATTREE
 	select OF_RESERVED_MEM
 	select OLD_SIGACTION			if PPC32
--- a/drivers/of/Kconfig
+++ b/drivers/of/Kconfig
@@ -103,4 +103,8 @@ config OF_OVERLAY
 config OF_NUMA
 	bool
 
+config OF_DMA_DEFAULT_COHERENT
+	# arches should select this if DMA is coherent by default for OF devices
+	bool
+
 endif # OF
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -970,12 +970,16 @@ EXPORT_SYMBOL_GPL(of_dma_get_range);
  * @np:	device node
  *
  * It returns true if "dma-coherent" property was found
- * for this device in DT.
+ * for this device in the DT, or if DMA is coherent by
+ * default for OF devices on the current platform.
  */
 bool of_dma_is_coherent(struct device_node *np)
 {
 	struct device_node *node = of_node_get(np);
 
+	if (IS_ENABLED(CONFIG_OF_DMA_DEFAULT_COHERENT))
+		return true;
+
 	while (node) {
 		if (of_property_read_bool(node, "dma-coherent")) {
 			of_node_put(node);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 086/195] dm zoned: support zone sizes smaller than 128MiB
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (84 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 085/195] of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 087/195] dm space map common: fix to ensure new block isnt already in use Greg Kroah-Hartman
                   ` (112 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Dmitry Fomichev, Damien Le Moal,
	Mike Snitzer

From: Dmitry Fomichev <dmitry.fomichev@wdc.com>

commit b39962950339912978484cdac50069258545d753 upstream.

dm-zoned is observed to log failed kernel assertions and not work
correctly when operating against a device with a zone size smaller
than 128MiB (e.g. 32768 bits per 4K block). The reason is that the
bitmap size per zone is calculated as zero with such a small zone
size. Fix this problem and also make the code related to zone bitmap
management be able to handle per zone bitmaps smaller than a single
block.

A dm-zoned-tools patch is required to properly format dm-zoned devices
with zone sizes smaller than 128MiB.

Fixes: 3b1a94c88b79 ("dm zoned: drive-managed zoned block device target")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/dm-zoned-metadata.c |   23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

--- a/drivers/md/dm-zoned-metadata.c
+++ b/drivers/md/dm-zoned-metadata.c
@@ -132,6 +132,7 @@ struct dmz_metadata {
 
 	sector_t		zone_bitmap_size;
 	unsigned int		zone_nr_bitmap_blocks;
+	unsigned int		zone_bits_per_mblk;
 
 	unsigned int		nr_bitmap_blocks;
 	unsigned int		nr_map_blocks;
@@ -1165,7 +1166,10 @@ static int dmz_init_zones(struct dmz_met
 
 	/* Init */
 	zmd->zone_bitmap_size = dev->zone_nr_blocks >> 3;
-	zmd->zone_nr_bitmap_blocks = zmd->zone_bitmap_size >> DMZ_BLOCK_SHIFT;
+	zmd->zone_nr_bitmap_blocks =
+		max_t(sector_t, 1, zmd->zone_bitmap_size >> DMZ_BLOCK_SHIFT);
+	zmd->zone_bits_per_mblk = min_t(sector_t, dev->zone_nr_blocks,
+					DMZ_BLOCK_SIZE_BITS);
 
 	/* Allocate zone array */
 	zmd->zones = kcalloc(dev->nr_zones, sizeof(struct dm_zone), GFP_KERNEL);
@@ -1982,7 +1986,7 @@ int dmz_copy_valid_blocks(struct dmz_met
 		dmz_release_mblock(zmd, to_mblk);
 		dmz_release_mblock(zmd, from_mblk);
 
-		chunk_block += DMZ_BLOCK_SIZE_BITS;
+		chunk_block += zmd->zone_bits_per_mblk;
 	}
 
 	to_zone->weight = from_zone->weight;
@@ -2043,7 +2047,7 @@ int dmz_validate_blocks(struct dmz_metad
 
 		/* Set bits */
 		bit = chunk_block & DMZ_BLOCK_MASK_BITS;
-		nr_bits = min(nr_blocks, DMZ_BLOCK_SIZE_BITS - bit);
+		nr_bits = min(nr_blocks, zmd->zone_bits_per_mblk - bit);
 
 		count = dmz_set_bits((unsigned long *)mblk->data, bit, nr_bits);
 		if (count) {
@@ -2122,7 +2126,7 @@ int dmz_invalidate_blocks(struct dmz_met
 
 		/* Clear bits */
 		bit = chunk_block & DMZ_BLOCK_MASK_BITS;
-		nr_bits = min(nr_blocks, DMZ_BLOCK_SIZE_BITS - bit);
+		nr_bits = min(nr_blocks, zmd->zone_bits_per_mblk - bit);
 
 		count = dmz_clear_bits((unsigned long *)mblk->data,
 				       bit, nr_bits);
@@ -2182,6 +2186,7 @@ static int dmz_to_next_set_block(struct
 {
 	struct dmz_mblock *mblk;
 	unsigned int bit, set_bit, nr_bits;
+	unsigned int zone_bits = zmd->zone_bits_per_mblk;
 	unsigned long *bitmap;
 	int n = 0;
 
@@ -2196,15 +2201,15 @@ static int dmz_to_next_set_block(struct
 		/* Get offset */
 		bitmap = (unsigned long *) mblk->data;
 		bit = chunk_block & DMZ_BLOCK_MASK_BITS;
-		nr_bits = min(nr_blocks, DMZ_BLOCK_SIZE_BITS - bit);
+		nr_bits = min(nr_blocks, zone_bits - bit);
 		if (set)
-			set_bit = find_next_bit(bitmap, DMZ_BLOCK_SIZE_BITS, bit);
+			set_bit = find_next_bit(bitmap, zone_bits, bit);
 		else
-			set_bit = find_next_zero_bit(bitmap, DMZ_BLOCK_SIZE_BITS, bit);
+			set_bit = find_next_zero_bit(bitmap, zone_bits, bit);
 		dmz_release_mblock(zmd, mblk);
 
 		n += set_bit - bit;
-		if (set_bit < DMZ_BLOCK_SIZE_BITS)
+		if (set_bit < zone_bits)
 			break;
 
 		nr_blocks -= nr_bits;
@@ -2307,7 +2312,7 @@ static void dmz_get_zone_weight(struct d
 		/* Count bits in this block */
 		bitmap = mblk->data;
 		bit = chunk_block & DMZ_BLOCK_MASK_BITS;
-		nr_bits = min(nr_blocks, DMZ_BLOCK_SIZE_BITS - bit);
+		nr_bits = min(nr_blocks, zmd->zone_bits_per_mblk - bit);
 		n += dmz_count_bits(bitmap, bit, nr_bits);
 
 		dmz_release_mblock(zmd, mblk);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 087/195] dm space map common: fix to ensure new block isnt already in use
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (85 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 086/195] dm zoned: support zone sizes smaller than 128MiB Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 088/195] dm crypt: fix benbi IV constructor crash if used in authenticated mode Greg Kroah-Hartman
                   ` (111 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Wheeler, Joe Thornber, Mike Snitzer

From: Joe Thornber <ejt@redhat.com>

commit 4feaef830de7ffdd8352e1fe14ad3bf13c9688f8 upstream.

The space-maps track the reference counts for disk blocks allocated by
both the thin-provisioning and cache targets.  There are variants for
tracking metadata blocks and data blocks.

Transactionality is implemented by never touching blocks from the
previous transaction, so we can rollback in the event of a crash.

When allocating a new block we need to ensure the block is free (has
reference count of 0) in both the current and previous transaction.
Prior to this fix we were doing this by searching for a free block in
the previous transaction, and relying on a 'begin' counter to track
where the last allocation in the current transaction was.  This
'begin' field was not being updated in all code paths (eg, increment
of a data block reference count due to breaking sharing of a neighbour
block in the same btree leaf).

This fix keeps the 'begin' field, but now it's just a hint to speed up
the search.  Instead the current transaction is searched for a free
block, and then the old transaction is double checked to ensure it's
free.  Much simpler.

This fixes reports of sm_disk_new_block()'s BUG_ON() triggering when
DM thin-provisioning's snapshots are heavily used.

Reported-by: Eric Wheeler <dm-devel@lists.ewheeler.net>
Cc: stable@vger.kernel.org
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/persistent-data/dm-space-map-common.c   |   27 +++++++++++++++++++++
 drivers/md/persistent-data/dm-space-map-common.h   |    2 +
 drivers/md/persistent-data/dm-space-map-disk.c     |    6 +++-
 drivers/md/persistent-data/dm-space-map-metadata.c |    5 +++
 4 files changed, 37 insertions(+), 3 deletions(-)

--- a/drivers/md/persistent-data/dm-space-map-common.c
+++ b/drivers/md/persistent-data/dm-space-map-common.c
@@ -382,6 +382,33 @@ int sm_ll_find_free_block(struct ll_disk
 	return -ENOSPC;
 }
 
+int sm_ll_find_common_free_block(struct ll_disk *old_ll, struct ll_disk *new_ll,
+	                         dm_block_t begin, dm_block_t end, dm_block_t *b)
+{
+	int r;
+	uint32_t count;
+
+	do {
+		r = sm_ll_find_free_block(new_ll, begin, new_ll->nr_blocks, b);
+		if (r)
+			break;
+
+		/* double check this block wasn't used in the old transaction */
+		if (*b >= old_ll->nr_blocks)
+			count = 0;
+		else {
+			r = sm_ll_lookup(old_ll, *b, &count);
+			if (r)
+				break;
+
+			if (count)
+				begin = *b + 1;
+		}
+	} while (count);
+
+	return r;
+}
+
 static int sm_ll_mutate(struct ll_disk *ll, dm_block_t b,
 			int (*mutator)(void *context, uint32_t old, uint32_t *new),
 			void *context, enum allocation_event *ev)
--- a/drivers/md/persistent-data/dm-space-map-common.h
+++ b/drivers/md/persistent-data/dm-space-map-common.h
@@ -109,6 +109,8 @@ int sm_ll_lookup_bitmap(struct ll_disk *
 int sm_ll_lookup(struct ll_disk *ll, dm_block_t b, uint32_t *result);
 int sm_ll_find_free_block(struct ll_disk *ll, dm_block_t begin,
 			  dm_block_t end, dm_block_t *result);
+int sm_ll_find_common_free_block(struct ll_disk *old_ll, struct ll_disk *new_ll,
+	                         dm_block_t begin, dm_block_t end, dm_block_t *result);
 int sm_ll_insert(struct ll_disk *ll, dm_block_t b, uint32_t ref_count, enum allocation_event *ev);
 int sm_ll_inc(struct ll_disk *ll, dm_block_t b, enum allocation_event *ev);
 int sm_ll_dec(struct ll_disk *ll, dm_block_t b, enum allocation_event *ev);
--- a/drivers/md/persistent-data/dm-space-map-disk.c
+++ b/drivers/md/persistent-data/dm-space-map-disk.c
@@ -167,8 +167,10 @@ static int sm_disk_new_block(struct dm_s
 	enum allocation_event ev;
 	struct sm_disk *smd = container_of(sm, struct sm_disk, sm);
 
-	/* FIXME: we should loop round a couple of times */
-	r = sm_ll_find_free_block(&smd->old_ll, smd->begin, smd->old_ll.nr_blocks, b);
+	/*
+	 * Any block we allocate has to be free in both the old and current ll.
+	 */
+	r = sm_ll_find_common_free_block(&smd->old_ll, &smd->ll, smd->begin, smd->ll.nr_blocks, b);
 	if (r)
 		return r;
 
--- a/drivers/md/persistent-data/dm-space-map-metadata.c
+++ b/drivers/md/persistent-data/dm-space-map-metadata.c
@@ -448,7 +448,10 @@ static int sm_metadata_new_block_(struct
 	enum allocation_event ev;
 	struct sm_metadata *smm = container_of(sm, struct sm_metadata, sm);
 
-	r = sm_ll_find_free_block(&smm->old_ll, smm->begin, smm->old_ll.nr_blocks, b);
+	/*
+	 * Any block we allocate has to be free in both the old and current ll.
+	 */
+	r = sm_ll_find_common_free_block(&smm->old_ll, &smm->ll, smm->begin, smm->ll.nr_blocks, b);
 	if (r)
 		return r;
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 088/195] dm crypt: fix benbi IV constructor crash if used in authenticated mode
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (86 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 087/195] dm space map common: fix to ensure new block isnt already in use Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 089/195] dm: fix potential for q->make_request_fn NULL pointer Greg Kroah-Hartman
                   ` (110 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Jerad Simpson, Milan Broz, Mike Snitzer

From: Milan Broz <gmazyland@gmail.com>

commit 4ea9471fbd1addb25a4d269991dc724e200ca5b5 upstream.

If benbi IV is used in AEAD construction, for example:
  cryptsetup luksFormat <device> --cipher twofish-xts-benbi --key-size 512 --integrity=hmac-sha256
the constructor uses wrong skcipher function and crashes:

 BUG: kernel NULL pointer dereference, address: 00000014
 ...
 EIP: crypt_iv_benbi_ctr+0x15/0x70 [dm_crypt]
 Call Trace:
  ? crypt_subkey_size+0x20/0x20 [dm_crypt]
  crypt_ctr+0x567/0xfc0 [dm_crypt]
  dm_table_add_target+0x15f/0x340 [dm_mod]

Fix this by properly using crypt_aead_blocksize() in this case.

Fixes: ef43aa38063a6 ("dm crypt: add cryptographic data integrity protection (authenticated encryption)")
Cc: stable@vger.kernel.org # v4.12+
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941051
Reported-by: Jerad Simpson <jbsimpson@gmail.com>
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/dm-crypt.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -482,8 +482,14 @@ static int crypt_iv_essiv_gen(struct cry
 static int crypt_iv_benbi_ctr(struct crypt_config *cc, struct dm_target *ti,
 			      const char *opts)
 {
-	unsigned bs = crypto_skcipher_blocksize(any_tfm(cc));
-	int log = ilog2(bs);
+	unsigned bs;
+	int log;
+
+	if (test_bit(CRYPT_MODE_INTEGRITY_AEAD, &cc->cipher_flags))
+		bs = crypto_aead_blocksize(any_tfm_aead(cc));
+	else
+		bs = crypto_skcipher_blocksize(any_tfm(cc));
+	log = ilog2(bs);
 
 	/* we need to calculate how far we must shift the sector count
 	 * to get the cipher block count, we use this shift in _gen */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 089/195] dm: fix potential for q->make_request_fn NULL pointer
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (87 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 088/195] dm crypt: fix benbi IV constructor crash if used in authenticated mode Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 090/195] dm writecache: fix incorrect flush sequence when doing SSD mode commit Greg Kroah-Hartman
                   ` (109 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Stefan Bader, Mike Snitzer

From: Mike Snitzer <snitzer@redhat.com>

commit 47ace7e012b9f7ad71d43ac9063d335ea3d6820b upstream.

Move blk_queue_make_request() to dm.c:alloc_dev() so that
q->make_request_fn is never NULL during the lifetime of a DM device
(even one that is created without a DM table).

Otherwise generic_make_request() will crash simply by doing:
  dmsetup create -n test
  mount /dev/dm-N /mnt

While at it, move ->congested_data initialization out of
dm.c:alloc_dev() and into the bio-based specific init method.

Reported-by: Stefan Bader <stefan.bader@canonical.com>
BugLink: https://bugs.launchpad.net/bugs/1860231
Fixes: ff36ab34583a ("dm: remove request-based logic from make_request_fn wrapper")
Depends-on: c12c9a3c3860c ("dm: various cleanups to md->queue initialization code")
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/dm.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1819,6 +1819,7 @@ static void dm_init_normal_md_queue(stru
 	/*
 	 * Initialize aspects of queue that aren't relevant for blk-mq
 	 */
+	md->queue->backing_dev_info->congested_data = md;
 	md->queue->backing_dev_info->congested_fn = dm_any_congested;
 }
 
@@ -1913,7 +1914,12 @@ static struct mapped_device *alloc_dev(i
 	if (!md->queue)
 		goto bad;
 	md->queue->queuedata = md;
-	md->queue->backing_dev_info->congested_data = md;
+	/*
+	 * default to bio-based required ->make_request_fn until DM
+	 * table is loaded and md->type established. If request-based
+	 * table is loaded: blk-mq will override accordingly.
+	 */
+	blk_queue_make_request(md->queue, dm_make_request);
 
 	md->disk = alloc_disk_node(1, md->numa_node_id);
 	if (!md->disk)
@@ -2242,7 +2248,6 @@ int dm_setup_md_queue(struct mapped_devi
 	case DM_TYPE_BIO_BASED:
 	case DM_TYPE_DAX_BIO_BASED:
 		dm_init_normal_md_queue(md);
-		blk_queue_make_request(md->queue, dm_make_request);
 		break;
 	case DM_TYPE_NVME_BIO_BASED:
 		dm_init_normal_md_queue(md);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 090/195] dm writecache: fix incorrect flush sequence when doing SSD mode commit
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (88 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 089/195] dm: fix potential for q->make_request_fn NULL pointer Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 091/195] padata: Remove broken queue flushing Greg Kroah-Hartman
                   ` (108 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Mikulas Patocka, Mike Snitzer

From: Mikulas Patocka <mpatocka@redhat.com>

commit aa9509209c5ac2f0b35d01a922bf9ae072d0c2fc upstream.

When committing state, the function writecache_flush does the following:
1. write metadata (writecache_commit_flushed)
2. flush disk cache (writecache_commit_flushed)
3. wait for data writes to complete (writecache_wait_for_ios)
4. increase superblock seq_count
5. write the superblock
6. flush disk cache

It may happen that at step 3, when we wait for some write to finish, the
disk may report the write as finished, but the write only hit the disk
cache and it is not yet stored in persistent storage. At step 5 we write
the superblock - it may happen that the superblock is written before the
write that we waited for in step 3. If the machine crashes, it may result
in incorrect data being returned after reboot.

In order to fix the bug, we must swap steps 2 and 3 in the above sequence,
so that we first wait for writes to complete and then flush the disk
cache.

Fixes: 48debafe4f2f ("dm: add writecache target")
Cc: stable@vger.kernel.org # 4.18+
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/dm-writecache.c |   41 +++++++++++++++++++++--------------------
 1 file changed, 21 insertions(+), 20 deletions(-)

--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -447,7 +447,13 @@ static void writecache_notify_io(unsigne
 		complete(&endio->c);
 }
 
-static void ssd_commit_flushed(struct dm_writecache *wc)
+static void writecache_wait_for_ios(struct dm_writecache *wc, int direction)
+{
+	wait_event(wc->bio_in_progress_wait[direction],
+		   !atomic_read(&wc->bio_in_progress[direction]));
+}
+
+static void ssd_commit_flushed(struct dm_writecache *wc, bool wait_for_ios)
 {
 	struct dm_io_region region;
 	struct dm_io_request req;
@@ -493,17 +499,20 @@ static void ssd_commit_flushed(struct dm
 	writecache_notify_io(0, &endio);
 	wait_for_completion_io(&endio.c);
 
+	if (wait_for_ios)
+		writecache_wait_for_ios(wc, WRITE);
+
 	writecache_disk_flush(wc, wc->ssd_dev);
 
 	memset(wc->dirty_bitmap, 0, wc->dirty_bitmap_size);
 }
 
-static void writecache_commit_flushed(struct dm_writecache *wc)
+static void writecache_commit_flushed(struct dm_writecache *wc, bool wait_for_ios)
 {
 	if (WC_MODE_PMEM(wc))
 		wmb();
 	else
-		ssd_commit_flushed(wc);
+		ssd_commit_flushed(wc, wait_for_ios);
 }
 
 static void writecache_disk_flush(struct dm_writecache *wc, struct dm_dev *dev)
@@ -527,12 +536,6 @@ static void writecache_disk_flush(struct
 		writecache_error(wc, r, "error flushing metadata: %d", r);
 }
 
-static void writecache_wait_for_ios(struct dm_writecache *wc, int direction)
-{
-	wait_event(wc->bio_in_progress_wait[direction],
-		   !atomic_read(&wc->bio_in_progress[direction]));
-}
-
 #define WFE_RETURN_FOLLOWING	1
 #define WFE_LOWEST_SEQ		2
 
@@ -730,14 +733,12 @@ static void writecache_flush(struct dm_w
 		e = e2;
 		cond_resched();
 	}
-	writecache_commit_flushed(wc);
-
-	writecache_wait_for_ios(wc, WRITE);
+	writecache_commit_flushed(wc, true);
 
 	wc->seq_count++;
 	pmem_assign(sb(wc)->seq_count, cpu_to_le64(wc->seq_count));
 	writecache_flush_region(wc, &sb(wc)->seq_count, sizeof sb(wc)->seq_count);
-	writecache_commit_flushed(wc);
+	writecache_commit_flushed(wc, false);
 
 	wc->overwrote_committed = false;
 
@@ -761,7 +762,7 @@ static void writecache_flush(struct dm_w
 	}
 
 	if (need_flush_after_free)
-		writecache_commit_flushed(wc);
+		writecache_commit_flushed(wc, false);
 }
 
 static void writecache_flush_work(struct work_struct *work)
@@ -814,7 +815,7 @@ static void writecache_discard(struct dm
 	}
 
 	if (discarded_something)
-		writecache_commit_flushed(wc);
+		writecache_commit_flushed(wc, false);
 }
 
 static bool writecache_wait_for_writeback(struct dm_writecache *wc)
@@ -963,7 +964,7 @@ erase_this:
 
 	if (need_flush) {
 		writecache_flush_all_metadata(wc);
-		writecache_commit_flushed(wc);
+		writecache_commit_flushed(wc, false);
 	}
 
 	wc_unlock(wc);
@@ -1347,7 +1348,7 @@ static void __writecache_endio_pmem(stru
 			wc->writeback_size--;
 			n_walked++;
 			if (unlikely(n_walked >= ENDIO_LATENCY)) {
-				writecache_commit_flushed(wc);
+				writecache_commit_flushed(wc, false);
 				wc_unlock(wc);
 				wc_lock(wc);
 				n_walked = 0;
@@ -1428,7 +1429,7 @@ pop_from_list:
 			writecache_wait_for_ios(wc, READ);
 		}
 
-		writecache_commit_flushed(wc);
+		writecache_commit_flushed(wc, false);
 
 		wc_unlock(wc);
 	}
@@ -1759,10 +1760,10 @@ static int init_memory(struct dm_writeca
 		write_original_sector_seq_count(wc, &wc->entries[b], -1, -1);
 
 	writecache_flush_all_metadata(wc);
-	writecache_commit_flushed(wc);
+	writecache_commit_flushed(wc, false);
 	pmem_assign(sb(wc)->magic, cpu_to_le32(MEMORY_SUPERBLOCK_MAGIC));
 	writecache_flush_region(wc, &sb(wc)->magic, sizeof sb(wc)->magic);
-	writecache_commit_flushed(wc);
+	writecache_commit_flushed(wc, false);
 
 	return 0;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 091/195] padata: Remove broken queue flushing
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (89 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 090/195] dm writecache: fix incorrect flush sequence when doing SSD mode commit Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-14 10:21   ` Yang Yingliang
  2020-02-10 12:32 ` [PATCH 4.19 092/195] tracing: Annotate ftrace_graph_hash pointer with __rcu Greg Kroah-Hartman
                   ` (107 subsequent siblings)
  198 siblings, 1 reply; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Herbert Xu, Daniel Jordan, Sasha Levin

From: Herbert Xu <herbert@gondor.apana.org.au>

[ Upstream commit 07928d9bfc81640bab36f5190e8725894d93b659 ]

The function padata_flush_queues is fundamentally broken because
it cannot force padata users to complete the request that is
underway.  IOW padata has to passively wait for the completion
of any outstanding work.

As it stands flushing is used in two places.  Its use in padata_stop
is simply unnecessary because nothing depends on the queues to
be flushed afterwards.

The other use in padata_replace is more substantial as we depend
on it to free the old pd structure.  This patch instead uses the
pd->refcnt to dynamically free the pd structure once all requests
are complete.

Fixes: 2b73b07ab8a4 ("padata: Flush the padata queues actively")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/padata.c | 46 ++++++++++++----------------------------------
 1 file changed, 12 insertions(+), 34 deletions(-)

diff --git a/kernel/padata.c b/kernel/padata.c
index 6c06b3039faed..11c5f9c8779ea 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -35,6 +35,8 @@
 
 #define MAX_OBJ_NUM 1000
 
+static void padata_free_pd(struct parallel_data *pd);
+
 static int padata_index_to_cpu(struct parallel_data *pd, int cpu_index)
 {
 	int cpu, target_cpu;
@@ -334,6 +336,7 @@ static void padata_serial_worker(struct work_struct *serial_work)
 	struct padata_serial_queue *squeue;
 	struct parallel_data *pd;
 	LIST_HEAD(local_list);
+	int cnt;
 
 	local_bh_disable();
 	squeue = container_of(serial_work, struct padata_serial_queue, work);
@@ -343,6 +346,8 @@ static void padata_serial_worker(struct work_struct *serial_work)
 	list_replace_init(&squeue->serial.list, &local_list);
 	spin_unlock(&squeue->serial.lock);
 
+	cnt = 0;
+
 	while (!list_empty(&local_list)) {
 		struct padata_priv *padata;
 
@@ -352,9 +357,12 @@ static void padata_serial_worker(struct work_struct *serial_work)
 		list_del_init(&padata->list);
 
 		padata->serial(padata);
-		atomic_dec(&pd->refcnt);
+		cnt++;
 	}
 	local_bh_enable();
+
+	if (atomic_sub_and_test(cnt, &pd->refcnt))
+		padata_free_pd(pd);
 }
 
 /**
@@ -501,8 +509,7 @@ static struct parallel_data *padata_alloc_pd(struct padata_instance *pinst,
 	timer_setup(&pd->timer, padata_reorder_timer, 0);
 	atomic_set(&pd->seq_nr, -1);
 	atomic_set(&pd->reorder_objects, 0);
-	atomic_set(&pd->refcnt, 0);
-	pd->pinst = pinst;
+	atomic_set(&pd->refcnt, 1);
 	spin_lock_init(&pd->lock);
 
 	return pd;
@@ -526,31 +533,6 @@ static void padata_free_pd(struct parallel_data *pd)
 	kfree(pd);
 }
 
-/* Flush all objects out of the padata queues. */
-static void padata_flush_queues(struct parallel_data *pd)
-{
-	int cpu;
-	struct padata_parallel_queue *pqueue;
-	struct padata_serial_queue *squeue;
-
-	for_each_cpu(cpu, pd->cpumask.pcpu) {
-		pqueue = per_cpu_ptr(pd->pqueue, cpu);
-		flush_work(&pqueue->work);
-	}
-
-	del_timer_sync(&pd->timer);
-
-	if (atomic_read(&pd->reorder_objects))
-		padata_reorder(pd);
-
-	for_each_cpu(cpu, pd->cpumask.cbcpu) {
-		squeue = per_cpu_ptr(pd->squeue, cpu);
-		flush_work(&squeue->work);
-	}
-
-	BUG_ON(atomic_read(&pd->refcnt) != 0);
-}
-
 static void __padata_start(struct padata_instance *pinst)
 {
 	pinst->flags |= PADATA_INIT;
@@ -564,10 +546,6 @@ static void __padata_stop(struct padata_instance *pinst)
 	pinst->flags &= ~PADATA_INIT;
 
 	synchronize_rcu();
-
-	get_online_cpus();
-	padata_flush_queues(pinst->pd);
-	put_online_cpus();
 }
 
 /* Replace the internal control structure with a new one. */
@@ -588,8 +566,8 @@ static void padata_replace(struct padata_instance *pinst,
 	if (!cpumask_equal(pd_old->cpumask.cbcpu, pd_new->cpumask.cbcpu))
 		notification_mask |= PADATA_CPU_SERIAL;
 
-	padata_flush_queues(pd_old);
-	padata_free_pd(pd_old);
+	if (atomic_dec_and_test(&pd_old->refcnt))
+		padata_free_pd(pd_old);
 
 	if (notification_mask)
 		blocking_notifier_call_chain(&pinst->cpumask_change_notifier,
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 092/195] tracing: Annotate ftrace_graph_hash pointer with __rcu
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (90 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 091/195] padata: Remove broken queue flushing Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 093/195] tracing: Annotate ftrace_graph_notrace_hash " Greg Kroah-Hartman
                   ` (106 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Joel Fernandes (Google),
	Amol Grover, Steven Rostedt (VMware),
	Sasha Levin

From: Amol Grover <frextrite@gmail.com>

[ Upstream commit 24a9729f831462b1d9d61dc85ecc91c59037243f ]

Fix following instances of sparse error
kernel/trace/ftrace.c:5664:29: error: incompatible types in comparison
kernel/trace/ftrace.c:5785:21: error: incompatible types in comparison
kernel/trace/ftrace.c:5864:36: error: incompatible types in comparison
kernel/trace/ftrace.c:5866:25: error: incompatible types in comparison

Use rcu_dereference_protected to access the __rcu annotated pointer.

Link: http://lkml.kernel.org/r/20200201072703.17330-1-frextrite@gmail.com

Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/trace/ftrace.c | 2 +-
 kernel/trace/trace.h  | 9 ++++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 37a435bac1618..00d987d9bd4a6 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5072,7 +5072,7 @@ static const struct file_operations ftrace_notrace_fops = {
 
 static DEFINE_MUTEX(graph_lock);
 
-struct ftrace_hash *ftrace_graph_hash = EMPTY_HASH;
+struct ftrace_hash __rcu *ftrace_graph_hash = EMPTY_HASH;
 struct ftrace_hash *ftrace_graph_notrace_hash = EMPTY_HASH;
 
 enum graph_filter_type {
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index d11d7bfc3fa5c..70806f2f89bab 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -872,22 +872,25 @@ extern void __trace_graph_return(struct trace_array *tr,
 				 unsigned long flags, int pc);
 
 #ifdef CONFIG_DYNAMIC_FTRACE
-extern struct ftrace_hash *ftrace_graph_hash;
+extern struct ftrace_hash __rcu *ftrace_graph_hash;
 extern struct ftrace_hash *ftrace_graph_notrace_hash;
 
 static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
 {
 	unsigned long addr = trace->func;
 	int ret = 0;
+	struct ftrace_hash *hash;
 
 	preempt_disable_notrace();
 
-	if (ftrace_hash_empty(ftrace_graph_hash)) {
+	hash = rcu_dereference_protected(ftrace_graph_hash, !preemptible());
+
+	if (ftrace_hash_empty(hash)) {
 		ret = 1;
 		goto out;
 	}
 
-	if (ftrace_lookup_ip(ftrace_graph_hash, addr)) {
+	if (ftrace_lookup_ip(hash, addr)) {
 
 		/*
 		 * This needs to be cleared on the return functions
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 093/195] tracing: Annotate ftrace_graph_notrace_hash pointer with __rcu
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (91 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 092/195] tracing: Annotate ftrace_graph_hash pointer with __rcu Greg Kroah-Hartman
@ 2020-02-10 12:32 ` " Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 094/195] ftrace: Add comment to why rcu_dereference_sched() is open coded Greg Kroah-Hartman
                   ` (105 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Amol Grover, Steven Rostedt (VMware),
	Sasha Levin

From: Amol Grover <frextrite@gmail.com>

[ Upstream commit fd0e6852c407dd9aefc594f54ddcc21d84803d3b ]

Fix following instances of sparse error
kernel/trace/ftrace.c:5667:29: error: incompatible types in comparison
kernel/trace/ftrace.c:5813:21: error: incompatible types in comparison
kernel/trace/ftrace.c:5868:36: error: incompatible types in comparison
kernel/trace/ftrace.c:5870:25: error: incompatible types in comparison

Use rcu_dereference_protected to dereference the newly annotated pointer.

Link: http://lkml.kernel.org/r/20200205055701.30195-1-frextrite@gmail.com

Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/trace/ftrace.c | 2 +-
 kernel/trace/trace.h  | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 00d987d9bd4a6..09c69ad8439ef 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5073,7 +5073,7 @@ static const struct file_operations ftrace_notrace_fops = {
 static DEFINE_MUTEX(graph_lock);
 
 struct ftrace_hash __rcu *ftrace_graph_hash = EMPTY_HASH;
-struct ftrace_hash *ftrace_graph_notrace_hash = EMPTY_HASH;
+struct ftrace_hash __rcu *ftrace_graph_notrace_hash = EMPTY_HASH;
 
 enum graph_filter_type {
 	GRAPH_FILTER_NOTRACE	= 0,
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 70806f2f89bab..cf1a7d1f35109 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -873,7 +873,7 @@ extern void __trace_graph_return(struct trace_array *tr,
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 extern struct ftrace_hash __rcu *ftrace_graph_hash;
-extern struct ftrace_hash *ftrace_graph_notrace_hash;
+extern struct ftrace_hash __rcu *ftrace_graph_notrace_hash;
 
 static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
 {
@@ -926,10 +926,14 @@ static inline void ftrace_graph_addr_finish(struct ftrace_graph_ret *trace)
 static inline int ftrace_graph_notrace_addr(unsigned long addr)
 {
 	int ret = 0;
+	struct ftrace_hash *notrace_hash;
 
 	preempt_disable_notrace();
 
-	if (ftrace_lookup_ip(ftrace_graph_notrace_hash, addr))
+	notrace_hash = rcu_dereference_protected(ftrace_graph_notrace_hash,
+						 !preemptible());
+
+	if (ftrace_lookup_ip(notrace_hash, addr))
 		ret = 1;
 
 	preempt_enable_notrace();
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 094/195] ftrace: Add comment to why rcu_dereference_sched() is open coded
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (92 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 093/195] tracing: Annotate ftrace_graph_notrace_hash " Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 095/195] ftrace: Protect ftrace_graph_hash with ftrace_sync Greg Kroah-Hartman
                   ` (104 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Joel Fernandes (Google),
	Steven Rostedt (VMware),
	Sasha Levin

From: Steven Rostedt (VMware) <rostedt@goodmis.org>

[ Upstream commit 16052dd5bdfa16dbe18d8c1d4cde2ddab9d23177 ]

Because the function graph tracer can execute in sections where RCU is not
"watching", the rcu_dereference_sched() for the has needs to be open coded.
This is fine because the RCU "flavor" of the ftrace hash is protected by
its own RCU handling (it does its own little synchronization on every CPU
and does not rely on RCU sched).

Acked-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/trace/trace.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index cf1a7d1f35109..1721b95ba9b7d 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -883,6 +883,11 @@ static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
 
 	preempt_disable_notrace();
 
+	/*
+	 * Have to open code "rcu_dereference_sched()" because the
+	 * function graph tracer can be called when RCU is not
+	 * "watching".
+	 */
 	hash = rcu_dereference_protected(ftrace_graph_hash, !preemptible());
 
 	if (ftrace_hash_empty(hash)) {
@@ -930,6 +935,11 @@ static inline int ftrace_graph_notrace_addr(unsigned long addr)
 
 	preempt_disable_notrace();
 
+	/*
+	 * Have to open code "rcu_dereference_sched()" because the
+	 * function graph tracer can be called when RCU is not
+	 * "watching".
+	 */
 	notrace_hash = rcu_dereference_protected(ftrace_graph_notrace_hash,
 						 !preemptible());
 
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 095/195] ftrace: Protect ftrace_graph_hash with ftrace_sync
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (93 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 094/195] ftrace: Add comment to why rcu_dereference_sched() is open coded Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 096/195] samples/bpf: Dont try to remove users homedir on clean Greg Kroah-Hartman
                   ` (103 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Paul E. McKenney,
	Joel Fernandes (Google), Steven Rostedt (VMware),
	Sasha Levin

From: Steven Rostedt (VMware) <rostedt@goodmis.org>

[ Upstream commit 54a16ff6f2e50775145b210bcd94d62c3c2af117 ]

As function_graph tracer can run when RCU is not "watching", it can not be
protected by synchronize_rcu() it requires running a task on each CPU before
it can be freed. Calling schedule_on_each_cpu(ftrace_sync) needs to be used.

Link: https://lore.kernel.org/r/20200205131110.GT2935@paulmck-ThinkPad-P72

Cc: stable@vger.kernel.org
Fixes: b9b0c831bed26 ("ftrace: Convert graph filter to use hash tables")
Reported-by: "Paul E. McKenney" <paulmck@kernel.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/trace/ftrace.c | 11 +++++++++--
 kernel/trace/trace.h  |  2 ++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 09c69ad8439ef..53795237e9751 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5344,8 +5344,15 @@ ftrace_graph_release(struct inode *inode, struct file *file)
 
 		mutex_unlock(&graph_lock);
 
-		/* Wait till all users are no longer using the old hash */
-		synchronize_sched();
+		/*
+		 * We need to do a hard force of sched synchronization.
+		 * This is because we use preempt_disable() to do RCU, but
+		 * the function tracers can be called where RCU is not watching
+		 * (like before user_exit()). We can not rely on the RCU
+		 * infrastructure to do the synchronization, thus we must do it
+		 * ourselves.
+		 */
+		schedule_on_each_cpu(ftrace_sync);
 
 		free_ftrace_hash(old_hash);
 	}
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 1721b95ba9b7d..ee0c6a313ed1a 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -887,6 +887,7 @@ static inline int ftrace_graph_addr(struct ftrace_graph_ent *trace)
 	 * Have to open code "rcu_dereference_sched()" because the
 	 * function graph tracer can be called when RCU is not
 	 * "watching".
+	 * Protected with schedule_on_each_cpu(ftrace_sync)
 	 */
 	hash = rcu_dereference_protected(ftrace_graph_hash, !preemptible());
 
@@ -939,6 +940,7 @@ static inline int ftrace_graph_notrace_addr(unsigned long addr)
 	 * Have to open code "rcu_dereference_sched()" because the
 	 * function graph tracer can be called when RCU is not
 	 * "watching".
+	 * Protected with schedule_on_each_cpu(ftrace_sync)
 	 */
 	notrace_hash = rcu_dereference_protected(ftrace_graph_notrace_hash,
 						 !preemptible());
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 096/195] samples/bpf: Dont try to remove users homedir on clean
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (94 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 095/195] ftrace: Protect ftrace_graph_hash with ftrace_sync Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 097/195] crypto: ccp - set max RSA modulus size for v3 platform devices as well Greg Kroah-Hartman
                   ` (102 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Toke Høiland-Jørgensen,
	Alexei Starovoitov, Jesper Dangaard Brouer

From: Toke Høiland-Jørgensen <toke@redhat.com>

commit b2e5e93ae8af6a34bca536cdc4b453ab1e707b8b upstream.

The 'clean' rule in the samples/bpf Makefile tries to remove backup
files (ending in ~). However, if no such files exist, it will instead try
to remove the user's home directory. While the attempt is mostly harmless,
it does lead to a somewhat scary warning like this:

rm: cannot remove '~': Is a directory

Fix this by using find instead of shell expansion to locate any actual
backup files that need to be removed.

Fixes: b62a796c109c ("samples/bpf: allow make to be run from samples/bpf/ directory")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/157952560126.1683545.7273054725976032511.stgit@toke.dk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 samples/bpf/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -221,7 +221,7 @@ all:
 
 clean:
 	$(MAKE) -C ../../ M=$(CURDIR) clean
-	@rm -f *~
+	@find $(CURDIR) -type f -name '*~' -delete
 
 $(LIBBPF): FORCE
 # Fix up variables inherited from Kbuild that tools/ build system won't like



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 097/195] crypto: ccp - set max RSA modulus size for v3 platform devices as well
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (95 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 096/195] samples/bpf: Dont try to remove users homedir on clean Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 098/195] crypto: pcrypt - Do not clear MAY_SLEEP flag in original request Greg Kroah-Hartman
                   ` (101 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Gary R Hook, Ard Biesheuvel, Herbert Xu

From: Ard Biesheuvel <ardb@kernel.org>

commit 11548f5a5747813ff84bed6f2ea01100053b0d8d upstream.

AMD Seattle incorporates a non-PCI version of the v3 CCP crypto
accelerator, and this version was left behind when the maximum
RSA modulus size was parameterized in order to support v5 hardware
which supports larger moduli than v3 hardware does. Due to this
oversight, RSA acceleration no longer works at all on these systems.

Fix this by setting the .rsamax property to the appropriate value
for v3 platform hardware.

Fixes: e28c190db66830c0 ("csrypto: ccp - Expand RSA support for a v5 ccp")
Cc: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/ccp/ccp-dev-v3.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/crypto/ccp/ccp-dev-v3.c
+++ b/drivers/crypto/ccp/ccp-dev-v3.c
@@ -590,6 +590,7 @@ const struct ccp_vdata ccpv3_platform =
 	.setup = NULL,
 	.perform = &ccp3_actions,
 	.offset = 0,
+	.rsamax = CCP_RSA_MAX_WIDTH,
 };
 
 const struct ccp_vdata ccpv3 = {



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 098/195] crypto: pcrypt - Do not clear MAY_SLEEP flag in original request
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (96 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 097/195] crypto: ccp - set max RSA modulus size for v3 platform devices as well Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 099/195] crypto: atmel-aes - Fix counter overflow in CTR mode Greg Kroah-Hartman
                   ` (100 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Eric Biggers, Herbert Xu

From: Herbert Xu <herbert@gondor.apana.org.au>

commit e8d998264bffade3cfe0536559f712ab9058d654 upstream.

We should not be modifying the original request's MAY_SLEEP flag
upon completion.  It makes no sense to do so anyway.

Reported-by: Eric Biggers <ebiggers@kernel.org>
Fixes: 5068c7a883d1 ("crypto: pcrypt - Add pcrypt crypto...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 crypto/pcrypt.c |    1 -
 1 file changed, 1 deletion(-)

--- a/crypto/pcrypt.c
+++ b/crypto/pcrypt.c
@@ -130,7 +130,6 @@ static void pcrypt_aead_done(struct cryp
 	struct padata_priv *padata = pcrypt_request_padata(preq);
 
 	padata->info = err;
-	req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	padata_do_serial(padata);
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 099/195] crypto: atmel-aes - Fix counter overflow in CTR mode
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (97 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 098/195] crypto: pcrypt - Do not clear MAY_SLEEP flag in original request Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 100/195] crypto: api - Fix race condition in crypto_spawn_alg Greg Kroah-Hartman
                   ` (99 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Tudor Ambarus, Herbert Xu

From: Tudor Ambarus <tudor.ambarus@microchip.com>

commit 781a08d9740afa73357f1a60d45d7c93d7cca2dd upstream.

32 bit counter is not supported by neither of our AES IPs, all implement
a 16 bit block counter. Drop the 32 bit block counter logic.

Fixes: fcac83656a3e ("crypto: atmel-aes - fix the counter overflow in CTR mode")
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/atmel-aes.c |   37 ++++++++++++-------------------------
 1 file changed, 12 insertions(+), 25 deletions(-)

--- a/drivers/crypto/atmel-aes.c
+++ b/drivers/crypto/atmel-aes.c
@@ -91,7 +91,6 @@
 struct atmel_aes_caps {
 	bool			has_dualbuff;
 	bool			has_cfb64;
-	bool			has_ctr32;
 	bool			has_gcm;
 	bool			has_xts;
 	bool			has_authenc;
@@ -1016,8 +1015,9 @@ static int atmel_aes_ctr_transfer(struct
 	struct atmel_aes_ctr_ctx *ctx = atmel_aes_ctr_ctx_cast(dd->ctx);
 	struct ablkcipher_request *req = ablkcipher_request_cast(dd->areq);
 	struct scatterlist *src, *dst;
-	u32 ctr, blocks;
 	size_t datalen;
+	u32 ctr;
+	u16 blocks, start, end;
 	bool use_dma, fragmented = false;
 
 	/* Check for transfer completion. */
@@ -1029,27 +1029,17 @@ static int atmel_aes_ctr_transfer(struct
 	datalen = req->nbytes - ctx->offset;
 	blocks = DIV_ROUND_UP(datalen, AES_BLOCK_SIZE);
 	ctr = be32_to_cpu(ctx->iv[3]);
-	if (dd->caps.has_ctr32) {
-		/* Check 32bit counter overflow. */
-		u32 start = ctr;
-		u32 end = start + blocks - 1;
-
-		if (end < start) {
-			ctr |= 0xffffffff;
-			datalen = AES_BLOCK_SIZE * -start;
-			fragmented = true;
-		}
-	} else {
-		/* Check 16bit counter overflow. */
-		u16 start = ctr & 0xffff;
-		u16 end = start + (u16)blocks - 1;
-
-		if (blocks >> 16 || end < start) {
-			ctr |= 0xffff;
-			datalen = AES_BLOCK_SIZE * (0x10000-start);
-			fragmented = true;
-		}
+
+	/* Check 16bit counter overflow. */
+	start = ctr & 0xffff;
+	end = start + blocks - 1;
+
+	if (blocks >> 16 || end < start) {
+		ctr |= 0xffff;
+		datalen = AES_BLOCK_SIZE * (0x10000 - start);
+		fragmented = true;
 	}
+
 	use_dma = (datalen >= ATMEL_AES_DMA_THRESHOLD);
 
 	/* Jump to offset. */
@@ -2553,7 +2543,6 @@ static void atmel_aes_get_cap(struct atm
 {
 	dd->caps.has_dualbuff = 0;
 	dd->caps.has_cfb64 = 0;
-	dd->caps.has_ctr32 = 0;
 	dd->caps.has_gcm = 0;
 	dd->caps.has_xts = 0;
 	dd->caps.has_authenc = 0;
@@ -2564,7 +2553,6 @@ static void atmel_aes_get_cap(struct atm
 	case 0x500:
 		dd->caps.has_dualbuff = 1;
 		dd->caps.has_cfb64 = 1;
-		dd->caps.has_ctr32 = 1;
 		dd->caps.has_gcm = 1;
 		dd->caps.has_xts = 1;
 		dd->caps.has_authenc = 1;
@@ -2573,7 +2561,6 @@ static void atmel_aes_get_cap(struct atm
 	case 0x200:
 		dd->caps.has_dualbuff = 1;
 		dd->caps.has_cfb64 = 1;
-		dd->caps.has_ctr32 = 1;
 		dd->caps.has_gcm = 1;
 		dd->caps.max_burst_size = 4;
 		break;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 100/195] crypto: api - Fix race condition in crypto_spawn_alg
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (98 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 099/195] crypto: atmel-aes - Fix counter overflow in CTR mode Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 101/195] crypto: picoxcell - adjust the position of tasklet_init and fix missed tasklet_kill Greg Kroah-Hartman
                   ` (98 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Herbert Xu

From: Herbert Xu <herbert@gondor.apana.org.au>

commit 73669cc556462f4e50376538d77ee312142e8a8a upstream.

The function crypto_spawn_alg is racy because it drops the lock
before shooting the dying algorithm.  The algorithm could disappear
altogether before we shoot it.

This patch fixes it by moving the shooting into the locked section.

Fixes: 6bfd48096ff8 ("[CRYPTO] api: Added spawns")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 crypto/algapi.c   |   16 +++++-----------
 crypto/api.c      |    3 +--
 crypto/internal.h |    1 -
 3 files changed, 6 insertions(+), 14 deletions(-)

--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -659,22 +659,16 @@ EXPORT_SYMBOL_GPL(crypto_drop_spawn);
 static struct crypto_alg *crypto_spawn_alg(struct crypto_spawn *spawn)
 {
 	struct crypto_alg *alg;
-	struct crypto_alg *alg2;
 
 	down_read(&crypto_alg_sem);
 	alg = spawn->alg;
-	alg2 = alg;
-	if (alg2)
-		alg2 = crypto_mod_get(alg2);
-	up_read(&crypto_alg_sem);
-
-	if (!alg2) {
-		if (alg)
-			crypto_shoot_alg(alg);
-		return ERR_PTR(-EAGAIN);
+	if (alg && !crypto_mod_get(alg)) {
+		alg->cra_flags |= CRYPTO_ALG_DYING;
+		alg = NULL;
 	}
+	up_read(&crypto_alg_sem);
 
-	return alg;
+	return alg ?: ERR_PTR(-EAGAIN);
 }
 
 struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -349,13 +349,12 @@ static unsigned int crypto_ctxsize(struc
 	return len;
 }
 
-void crypto_shoot_alg(struct crypto_alg *alg)
+static void crypto_shoot_alg(struct crypto_alg *alg)
 {
 	down_write(&crypto_alg_sem);
 	alg->cra_flags |= CRYPTO_ALG_DYING;
 	up_write(&crypto_alg_sem);
 }
-EXPORT_SYMBOL_GPL(crypto_shoot_alg);
 
 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
 				      u32 mask)
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -79,7 +79,6 @@ void crypto_alg_tested(const char *name,
 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
 			  struct crypto_alg *nalg);
 void crypto_remove_final(struct list_head *list);
-void crypto_shoot_alg(struct crypto_alg *alg);
 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
 				      u32 mask);
 void *crypto_create_tfm(struct crypto_alg *alg,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 101/195] crypto: picoxcell - adjust the position of tasklet_init and fix missed tasklet_kill
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (99 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 100/195] crypto: api - Fix race condition in crypto_spawn_alg Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 102/195] scsi: qla2xxx: Fix unbound NVME response length Greg Kroah-Hartman
                   ` (97 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Chuhong Yuan, Herbert Xu

From: Chuhong Yuan <hslester96@gmail.com>

commit 7f8c36fe9be46862c4f3c5302f769378028a34fa upstream.

Since tasklet is needed to be initialized before registering IRQ
handler, adjust the position of tasklet_init to fix the wrong order.

Besides, to fix the missed tasklet_kill, this patch adds a helper
function and uses devm_add_action to kill the tasklet automatically.

Fixes: ce92136843cb ("crypto: picoxcell - add support for the picoxcell crypto engines")
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/picoxcell_crypto.c |   15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

--- a/drivers/crypto/picoxcell_crypto.c
+++ b/drivers/crypto/picoxcell_crypto.c
@@ -1616,6 +1616,11 @@ static const struct of_device_id spacc_o
 MODULE_DEVICE_TABLE(of, spacc_of_id_table);
 #endif /* CONFIG_OF */
 
+static void spacc_tasklet_kill(void *data)
+{
+	tasklet_kill(data);
+}
+
 static int spacc_probe(struct platform_device *pdev)
 {
 	int i, err, ret;
@@ -1659,6 +1664,14 @@ static int spacc_probe(struct platform_d
 		return -ENXIO;
 	}
 
+	tasklet_init(&engine->complete, spacc_spacc_complete,
+		     (unsigned long)engine);
+
+	ret = devm_add_action(&pdev->dev, spacc_tasklet_kill,
+			      &engine->complete);
+	if (ret)
+		return ret;
+
 	if (devm_request_irq(&pdev->dev, irq->start, spacc_spacc_irq, 0,
 			     engine->name, engine)) {
 		dev_err(engine->dev, "failed to request IRQ\n");
@@ -1716,8 +1729,6 @@ static int spacc_probe(struct platform_d
 	INIT_LIST_HEAD(&engine->completed);
 	INIT_LIST_HEAD(&engine->in_progress);
 	engine->in_flight = 0;
-	tasklet_init(&engine->complete, spacc_spacc_complete,
-		     (unsigned long)engine);
 
 	platform_set_drvdata(pdev, engine);
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 102/195] scsi: qla2xxx: Fix unbound NVME response length
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (100 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 101/195] crypto: picoxcell - adjust the position of tasklet_init and fix missed tasklet_kill Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 103/195] NFS: Fix memory leaks and corruption in readdir Greg Kroah-Hartman
                   ` (96 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Arun Easi, Himanshu Madhani,
	Ewan D. Milne, Martin K. Petersen

From: Arun Easi <aeasi@marvell.com>

commit 00fe717ee1ea3c2979db4f94b1533c57aed8dea9 upstream.

On certain cases when response length is less than 32, NVME response data
is supplied inline in IOCB. This is indicated by some combination of state
flags. There was an instance when a high, and incorrect, response length
was indicated causing driver to overrun buffers. Fix this by checking and
limiting the response payload length.

Fixes: 7401bc18d1ee3 ("scsi: qla2xxx: Add FC-NVMe command handling")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200124045014.23554-1-hmadhani@marvell.com
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_dbg.c |    6 ------
 drivers/scsi/qla2xxx/qla_dbg.h |    6 ++++++
 drivers/scsi/qla2xxx/qla_isr.c |   12 ++++++++++++
 3 files changed, 18 insertions(+), 6 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -2520,12 +2520,6 @@ qla83xx_fw_dump_failed:
 /*                         Driver Debug Functions.                          */
 /****************************************************************************/
 
-static inline int
-ql_mask_match(uint32_t level)
-{
-	return (level & ql2xextended_error_logging) == level;
-}
-
 /*
  * This function is for formatting and logging debug information.
  * It is to be used when vha is available. It formats the message
--- a/drivers/scsi/qla2xxx/qla_dbg.h
+++ b/drivers/scsi/qla2xxx/qla_dbg.h
@@ -374,3 +374,9 @@ extern int qla24xx_dump_ram(struct qla_h
 extern void qla24xx_pause_risc(struct device_reg_24xx __iomem *,
 	struct qla_hw_data *);
 extern int qla24xx_soft_reset(struct qla_hw_data *);
+
+static inline int
+ql_mask_match(uint level)
+{
+	return (level & ql2xextended_error_logging) == level;
+}
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1876,6 +1876,18 @@ static void qla24xx_nvme_iocb_entry(scsi
 		inbuf = (uint32_t *)&sts->nvme_ersp_data;
 		outbuf = (uint32_t *)fd->rspaddr;
 		iocb->u.nvme.rsp_pyld_len = le16_to_cpu(sts->nvme_rsp_pyld_len);
+		if (unlikely(iocb->u.nvme.rsp_pyld_len >
+		    sizeof(struct nvme_fc_ersp_iu))) {
+			if (ql_mask_match(ql_dbg_io)) {
+				WARN_ONCE(1, "Unexpected response payload length %u.\n",
+				    iocb->u.nvme.rsp_pyld_len);
+				ql_log(ql_log_warn, fcport->vha, 0x5100,
+				    "Unexpected response payload length %u.\n",
+				    iocb->u.nvme.rsp_pyld_len);
+			}
+			iocb->u.nvme.rsp_pyld_len =
+			    sizeof(struct nvme_fc_ersp_iu);
+		}
 		iter = iocb->u.nvme.rsp_pyld_len >> 2;
 		for (; iter; iter--)
 			*outbuf++ = swab32(*inbuf++);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 103/195] NFS: Fix memory leaks and corruption in readdir
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (101 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 102/195] scsi: qla2xxx: Fix unbound NVME response length Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 104/195] NFS: Directory page cache pages need to be locked when read Greg Kroah-Hartman
                   ` (95 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Trond Myklebust, Benjamin Coddington,
	Anna Schumaker

From: Trond Myklebust <trondmy@gmail.com>

commit 4b310319c6a8ce708f1033d57145e2aa027a883c upstream.

nfs_readdir_xdr_to_array() must not exit without having initialised
the array, so that the page cache deletion routines can safely
call nfs_readdir_clear_array().
Furthermore, we should ensure that if we exit nfs_readdir_filler()
with an error, we free up any page contents to prevent a leak
if we try to fill the page again.

Fixes: 11de3b11e08c ("NFS: Fix a memory leak in nfs_readdir")
Cc: stable@vger.kernel.org # v2.6.37+
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfs/dir.c |   17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -162,6 +162,17 @@ typedef struct {
 	bool eof;
 } nfs_readdir_descriptor_t;
 
+static
+void nfs_readdir_init_array(struct page *page)
+{
+	struct nfs_cache_array *array;
+
+	array = kmap_atomic(page);
+	memset(array, 0, sizeof(struct nfs_cache_array));
+	array->eof_index = -1;
+	kunmap_atomic(array);
+}
+
 /*
  * we are freeing strings created by nfs_add_to_readdir_array()
  */
@@ -174,6 +185,7 @@ void nfs_readdir_clear_array(struct page
 	array = kmap_atomic(page);
 	for (i = 0; i < array->size; i++)
 		kfree(array->array[i].string.name);
+	array->size = 0;
 	kunmap_atomic(array);
 }
 
@@ -610,6 +622,8 @@ int nfs_readdir_xdr_to_array(nfs_readdir
 	int status = -ENOMEM;
 	unsigned int array_size = ARRAY_SIZE(pages);
 
+	nfs_readdir_init_array(page);
+
 	entry.prev_cookie = 0;
 	entry.cookie = desc->last_cookie;
 	entry.eof = 0;
@@ -626,8 +640,6 @@ int nfs_readdir_xdr_to_array(nfs_readdir
 	}
 
 	array = kmap(page);
-	memset(array, 0, sizeof(struct nfs_cache_array));
-	array->eof_index = -1;
 
 	status = nfs_readdir_alloc_pages(pages, array_size);
 	if (status < 0)
@@ -681,6 +693,7 @@ int nfs_readdir_filler(nfs_readdir_descr
 	unlock_page(page);
 	return 0;
  error:
+	nfs_readdir_clear_array(page);
 	unlock_page(page);
 	return ret;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 104/195] NFS: Directory page cache pages need to be locked when read
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (102 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 103/195] NFS: Fix memory leaks and corruption in readdir Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 105/195] jbd2_seq_info_next should increase position index Greg Kroah-Hartman
                   ` (94 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Trond Myklebust, Benjamin Coddington,
	Anna Schumaker

From: Trond Myklebust <trondmy@gmail.com>

commit 114de38225d9b300f027e2aec9afbb6e0def154b upstream.

When a NFS directory page cache page is removed from the page cache,
its contents are freed through a call to nfs_readdir_clear_array().
To prevent the removal of the page cache entry until after we've
finished reading it, we must take the page lock.

Fixes: 11de3b11e08c ("NFS: Fix a memory leak in nfs_readdir")
Cc: stable@vger.kernel.org # v2.6.37+
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfs/dir.c |   30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -701,8 +701,6 @@ int nfs_readdir_filler(nfs_readdir_descr
 static
 void cache_page_release(nfs_readdir_descriptor_t *desc)
 {
-	if (!desc->page->mapping)
-		nfs_readdir_clear_array(desc->page);
 	put_page(desc->page);
 	desc->page = NULL;
 }
@@ -716,19 +714,28 @@ struct page *get_cache_page(nfs_readdir_
 
 /*
  * Returns 0 if desc->dir_cookie was found on page desc->page_index
+ * and locks the page to prevent removal from the page cache.
  */
 static
-int find_cache_page(nfs_readdir_descriptor_t *desc)
+int find_and_lock_cache_page(nfs_readdir_descriptor_t *desc)
 {
 	int res;
 
 	desc->page = get_cache_page(desc);
 	if (IS_ERR(desc->page))
 		return PTR_ERR(desc->page);
-
-	res = nfs_readdir_search_array(desc);
+	res = lock_page_killable(desc->page);
 	if (res != 0)
-		cache_page_release(desc);
+		goto error;
+	res = -EAGAIN;
+	if (desc->page->mapping != NULL) {
+		res = nfs_readdir_search_array(desc);
+		if (res == 0)
+			return 0;
+	}
+	unlock_page(desc->page);
+error:
+	cache_page_release(desc);
 	return res;
 }
 
@@ -743,7 +750,7 @@ int readdir_search_pagecache(nfs_readdir
 		desc->last_cookie = 0;
 	}
 	do {
-		res = find_cache_page(desc);
+		res = find_and_lock_cache_page(desc);
 	} while (res == -EAGAIN);
 	return res;
 }
@@ -782,7 +789,6 @@ int nfs_do_filldir(nfs_readdir_descripto
 		desc->eof = true;
 
 	kunmap(desc->page);
-	cache_page_release(desc);
 	dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n",
 			(unsigned long long)*desc->dir_cookie, res);
 	return res;
@@ -828,13 +834,13 @@ int uncached_readdir(nfs_readdir_descrip
 
 	status = nfs_do_filldir(desc);
 
+ out_release:
+	nfs_readdir_clear_array(desc->page);
+	cache_page_release(desc);
  out:
 	dfprintk(DIRCACHE, "NFS: %s: returns %d\n",
 			__func__, status);
 	return status;
- out_release:
-	cache_page_release(desc);
-	goto out;
 }
 
 /* The file offset position represents the dirent entry number.  A
@@ -899,6 +905,8 @@ static int nfs_readdir(struct file *file
 			break;
 
 		res = nfs_do_filldir(desc);
+		unlock_page(desc->page);
+		cache_page_release(desc);
 		if (res < 0)
 			break;
 	} while (!desc->eof);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 105/195] jbd2_seq_info_next should increase position index
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (103 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 104/195] NFS: Directory page cache pages need to be locked when read Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 106/195] Btrfs: fix missing hole after hole punching and fsync when using NO_HOLES Greg Kroah-Hartman
                   ` (93 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, stable, Vasily Averin, Jan Kara,
	Theodore Tso

From: Vasily Averin <vvs@virtuozzo.com>

commit 1a8e9cf40c9a6a2e40b1e924b13ed303aeea4418 upstream.

if seq_file .next fuction does not change position index,
read after some lseek can generate unexpected output.

Script below generates endless output
 $ q=;while read -r r;do echo "$((++q)) $r";done </proc/fs/jbd2/DEV/info

https://bugzilla.kernel.org/show_bug.cgi?id=206283

Fixes: 1f4aace60b0e ("fs/seq_file.c: simplify seq_file iteration code and interface")
Cc: stable@kernel.org
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/d13805e5-695e-8ac3-b678-26ca2313629f@virtuozzo.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/jbd2/journal.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1002,6 +1002,7 @@ static void *jbd2_seq_info_start(struct
 
 static void *jbd2_seq_info_next(struct seq_file *seq, void *v, loff_t *pos)
 {
+	(*pos)++;
 	return NULL;
 }
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 106/195] Btrfs: fix missing hole after hole punching and fsync when using NO_HOLES
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (104 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 105/195] jbd2_seq_info_next should increase position index Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 107/195] btrfs: set trans->drity in btrfs_commit_transaction Greg Kroah-Hartman
                   ` (92 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Josef Bacik, Filipe Manana, David Sterba

From: Filipe Manana <fdmanana@suse.com>

commit 0e56315ca147b3e60c7bf240233a301d3c7fb508 upstream.

When using the NO_HOLES feature, if we punch a hole into a file and then
fsync it, there are cases where a subsequent fsync will miss the fact that
a hole was punched, resulting in the holes not existing after replaying
the log tree.

Essentially these cases all imply that, tree-log.c:copy_items(), is not
invoked for the leafs that delimit holes, because nothing changed those
leafs in the current transaction. And it's precisely copy_items() where
we currenly detect and log holes, which works as long as the holes are
between file extent items in the input leaf or between the beginning of
input leaf and the previous leaf or between the last item in the leaf
and the next leaf.

First example where we miss a hole:

  *) The extent items of the inode span multiple leafs;

  *) The punched hole covers a range that affects only the extent items of
     the first leaf;

  *) The fsync operation is done in full mode (BTRFS_INODE_NEEDS_FULL_SYNC
     is set in the inode's runtime flags).

  That results in the hole not existing after replaying the log tree.

  For example, if the fs/subvolume tree has the following layout for a
  particular inode:

      Leaf N, generation 10:

      [ ... INODE_ITEM INODE_REF EXTENT_ITEM (0 64K) EXTENT_ITEM (64K 128K) ]

      Leaf N + 1, generation 10:

      [ EXTENT_ITEM (128K 64K) ... ]

  If at transaction 11 we punch a hole coverting the range [0, 128K[, we end
  up dropping the two extent items from leaf N, but we don't touch the other
  leaf, so we end up in the following state:

      Leaf N, generation 11:

      [ ... INODE_ITEM INODE_REF ]

      Leaf N + 1, generation 10:

      [ EXTENT_ITEM (128K 64K) ... ]

  A full fsync after punching the hole will only process leaf N because it
  was modified in the current transaction, but not leaf N + 1, since it
  was not modified in the current transaction (generation 10 and not 11).
  As a result the fsync will not log any holes, because it didn't process
  any leaf with extent items.

Second example where we will miss a hole:

  *) An inode as its items spanning 5 (or more) leafs;

  *) A hole is punched and it covers only the extents items of the 3rd
     leaf. This resulsts in deleting the entire leaf and not touching any
     of the other leafs.

  So the only leaf that is modified in the current transaction, when
  punching the hole, is the first leaf, which contains the inode item.
  During the full fsync, the only leaf that is passed to copy_items()
  is that first leaf, and that's not enough for the hole detection
  code in copy_items() to determine there's a hole between the last
  file extent item in the 2nd leaf and the first file extent item in
  the 3rd leaf (which was the 4th leaf before punching the hole).

Fix this by scanning all leafs and punch holes as necessary when doing a
full fsync (less common than a non-full fsync) when the NO_HOLES feature
is enabled. The lack of explicit file extent items to mark holes makes it
necessary to scan existing extents to determine if holes exist.

A test case for fstests follows soon.

Fixes: 16e7549f045d33 ("Btrfs: incompatible format change to remove hole extents")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/btrfs/tree-log.c |  388 +++++++++++++---------------------------------------
 1 file changed, 100 insertions(+), 288 deletions(-)

--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -3892,7 +3892,7 @@ static int log_csums(struct btrfs_trans_
 static noinline int copy_items(struct btrfs_trans_handle *trans,
 			       struct btrfs_inode *inode,
 			       struct btrfs_path *dst_path,
-			       struct btrfs_path *src_path, u64 *last_extent,
+			       struct btrfs_path *src_path,
 			       int start_slot, int nr, int inode_only,
 			       u64 logged_isize)
 {
@@ -3903,7 +3903,6 @@ static noinline int copy_items(struct bt
 	struct btrfs_file_extent_item *extent;
 	struct btrfs_inode_item *inode_item;
 	struct extent_buffer *src = src_path->nodes[0];
-	struct btrfs_key first_key, last_key, key;
 	int ret;
 	struct btrfs_key *ins_keys;
 	u32 *ins_sizes;
@@ -3911,9 +3910,6 @@ static noinline int copy_items(struct bt
 	int i;
 	struct list_head ordered_sums;
 	int skip_csum = inode->flags & BTRFS_INODE_NODATASUM;
-	bool has_extents = false;
-	bool need_find_last_extent = true;
-	bool done = false;
 
 	INIT_LIST_HEAD(&ordered_sums);
 
@@ -3922,8 +3918,6 @@ static noinline int copy_items(struct bt
 	if (!ins_data)
 		return -ENOMEM;
 
-	first_key.objectid = (u64)-1;
-
 	ins_sizes = (u32 *)ins_data;
 	ins_keys = (struct btrfs_key *)(ins_data + nr * sizeof(u32));
 
@@ -3944,9 +3938,6 @@ static noinline int copy_items(struct bt
 
 		src_offset = btrfs_item_ptr_offset(src, start_slot + i);
 
-		if (i == nr - 1)
-			last_key = ins_keys[i];
-
 		if (ins_keys[i].type == BTRFS_INODE_ITEM_KEY) {
 			inode_item = btrfs_item_ptr(dst_path->nodes[0],
 						    dst_path->slots[0],
@@ -3960,20 +3951,6 @@ static noinline int copy_items(struct bt
 					   src_offset, ins_sizes[i]);
 		}
 
-		/*
-		 * We set need_find_last_extent here in case we know we were
-		 * processing other items and then walk into the first extent in
-		 * the inode.  If we don't hit an extent then nothing changes,
-		 * we'll do the last search the next time around.
-		 */
-		if (ins_keys[i].type == BTRFS_EXTENT_DATA_KEY) {
-			has_extents = true;
-			if (first_key.objectid == (u64)-1)
-				first_key = ins_keys[i];
-		} else {
-			need_find_last_extent = false;
-		}
-
 		/* take a reference on file data extents so that truncates
 		 * or deletes of this inode don't have to relog the inode
 		 * again
@@ -4039,167 +4016,6 @@ static noinline int copy_items(struct bt
 		kfree(sums);
 	}
 
-	if (!has_extents)
-		return ret;
-
-	if (need_find_last_extent && *last_extent == first_key.offset) {
-		/*
-		 * We don't have any leafs between our current one and the one
-		 * we processed before that can have file extent items for our
-		 * inode (and have a generation number smaller than our current
-		 * transaction id).
-		 */
-		need_find_last_extent = false;
-	}
-
-	/*
-	 * Because we use btrfs_search_forward we could skip leaves that were
-	 * not modified and then assume *last_extent is valid when it really
-	 * isn't.  So back up to the previous leaf and read the end of the last
-	 * extent before we go and fill in holes.
-	 */
-	if (need_find_last_extent) {
-		u64 len;
-
-		ret = btrfs_prev_leaf(inode->root, src_path);
-		if (ret < 0)
-			return ret;
-		if (ret)
-			goto fill_holes;
-		if (src_path->slots[0])
-			src_path->slots[0]--;
-		src = src_path->nodes[0];
-		btrfs_item_key_to_cpu(src, &key, src_path->slots[0]);
-		if (key.objectid != btrfs_ino(inode) ||
-		    key.type != BTRFS_EXTENT_DATA_KEY)
-			goto fill_holes;
-		extent = btrfs_item_ptr(src, src_path->slots[0],
-					struct btrfs_file_extent_item);
-		if (btrfs_file_extent_type(src, extent) ==
-		    BTRFS_FILE_EXTENT_INLINE) {
-			len = btrfs_file_extent_ram_bytes(src, extent);
-			*last_extent = ALIGN(key.offset + len,
-					     fs_info->sectorsize);
-		} else {
-			len = btrfs_file_extent_num_bytes(src, extent);
-			*last_extent = key.offset + len;
-		}
-	}
-fill_holes:
-	/* So we did prev_leaf, now we need to move to the next leaf, but a few
-	 * things could have happened
-	 *
-	 * 1) A merge could have happened, so we could currently be on a leaf
-	 * that holds what we were copying in the first place.
-	 * 2) A split could have happened, and now not all of the items we want
-	 * are on the same leaf.
-	 *
-	 * So we need to adjust how we search for holes, we need to drop the
-	 * path and re-search for the first extent key we found, and then walk
-	 * forward until we hit the last one we copied.
-	 */
-	if (need_find_last_extent) {
-		/* btrfs_prev_leaf could return 1 without releasing the path */
-		btrfs_release_path(src_path);
-		ret = btrfs_search_slot(NULL, inode->root, &first_key,
-				src_path, 0, 0);
-		if (ret < 0)
-			return ret;
-		ASSERT(ret == 0);
-		src = src_path->nodes[0];
-		i = src_path->slots[0];
-	} else {
-		i = start_slot;
-	}
-
-	/*
-	 * Ok so here we need to go through and fill in any holes we may have
-	 * to make sure that holes are punched for those areas in case they had
-	 * extents previously.
-	 */
-	while (!done) {
-		u64 offset, len;
-		u64 extent_end;
-
-		if (i >= btrfs_header_nritems(src_path->nodes[0])) {
-			ret = btrfs_next_leaf(inode->root, src_path);
-			if (ret < 0)
-				return ret;
-			ASSERT(ret == 0);
-			src = src_path->nodes[0];
-			i = 0;
-			need_find_last_extent = true;
-		}
-
-		btrfs_item_key_to_cpu(src, &key, i);
-		if (!btrfs_comp_cpu_keys(&key, &last_key))
-			done = true;
-		if (key.objectid != btrfs_ino(inode) ||
-		    key.type != BTRFS_EXTENT_DATA_KEY) {
-			i++;
-			continue;
-		}
-		extent = btrfs_item_ptr(src, i, struct btrfs_file_extent_item);
-		if (btrfs_file_extent_type(src, extent) ==
-		    BTRFS_FILE_EXTENT_INLINE) {
-			len = btrfs_file_extent_ram_bytes(src, extent);
-			extent_end = ALIGN(key.offset + len,
-					   fs_info->sectorsize);
-		} else {
-			len = btrfs_file_extent_num_bytes(src, extent);
-			extent_end = key.offset + len;
-		}
-		i++;
-
-		if (*last_extent == key.offset) {
-			*last_extent = extent_end;
-			continue;
-		}
-		offset = *last_extent;
-		len = key.offset - *last_extent;
-		ret = btrfs_insert_file_extent(trans, log, btrfs_ino(inode),
-				offset, 0, 0, len, 0, len, 0, 0, 0);
-		if (ret)
-			break;
-		*last_extent = extent_end;
-	}
-
-	/*
-	 * Check if there is a hole between the last extent found in our leaf
-	 * and the first extent in the next leaf. If there is one, we need to
-	 * log an explicit hole so that at replay time we can punch the hole.
-	 */
-	if (ret == 0 &&
-	    key.objectid == btrfs_ino(inode) &&
-	    key.type == BTRFS_EXTENT_DATA_KEY &&
-	    i == btrfs_header_nritems(src_path->nodes[0])) {
-		ret = btrfs_next_leaf(inode->root, src_path);
-		need_find_last_extent = true;
-		if (ret > 0) {
-			ret = 0;
-		} else if (ret == 0) {
-			btrfs_item_key_to_cpu(src_path->nodes[0], &key,
-					      src_path->slots[0]);
-			if (key.objectid == btrfs_ino(inode) &&
-			    key.type == BTRFS_EXTENT_DATA_KEY &&
-			    *last_extent < key.offset) {
-				const u64 len = key.offset - *last_extent;
-
-				ret = btrfs_insert_file_extent(trans, log,
-							       btrfs_ino(inode),
-							       *last_extent, 0,
-							       0, len, 0, len,
-							       0, 0, 0);
-				*last_extent += len;
-			}
-		}
-	}
-	/*
-	 * Need to let the callers know we dropped the path so they should
-	 * re-search.
-	 */
-	if (!ret && need_find_last_extent)
-		ret = 1;
 	return ret;
 }
 
@@ -4365,7 +4181,7 @@ static int btrfs_log_prealloc_extents(st
 	const u64 i_size = i_size_read(&inode->vfs_inode);
 	const u64 ino = btrfs_ino(inode);
 	struct btrfs_path *dst_path = NULL;
-	u64 last_extent = (u64)-1;
+	bool dropped_extents = false;
 	int ins_nr = 0;
 	int start_slot;
 	int ret;
@@ -4387,8 +4203,7 @@ static int btrfs_log_prealloc_extents(st
 		if (slot >= btrfs_header_nritems(leaf)) {
 			if (ins_nr > 0) {
 				ret = copy_items(trans, inode, dst_path, path,
-						 &last_extent, start_slot,
-						 ins_nr, 1, 0);
+						 start_slot, ins_nr, 1, 0);
 				if (ret < 0)
 					goto out;
 				ins_nr = 0;
@@ -4412,8 +4227,7 @@ static int btrfs_log_prealloc_extents(st
 			path->slots[0]++;
 			continue;
 		}
-		if (last_extent == (u64)-1) {
-			last_extent = key.offset;
+		if (!dropped_extents) {
 			/*
 			 * Avoid logging extent items logged in past fsync calls
 			 * and leading to duplicate keys in the log tree.
@@ -4427,6 +4241,7 @@ static int btrfs_log_prealloc_extents(st
 			} while (ret == -EAGAIN);
 			if (ret)
 				goto out;
+			dropped_extents = true;
 		}
 		if (ins_nr == 0)
 			start_slot = slot;
@@ -4441,7 +4256,7 @@ static int btrfs_log_prealloc_extents(st
 		}
 	}
 	if (ins_nr > 0) {
-		ret = copy_items(trans, inode, dst_path, path, &last_extent,
+		ret = copy_items(trans, inode, dst_path, path,
 				 start_slot, ins_nr, 1, 0);
 		if (ret > 0)
 			ret = 0;
@@ -4636,13 +4451,8 @@ static int btrfs_log_all_xattrs(struct b
 
 		if (slot >= nritems) {
 			if (ins_nr > 0) {
-				u64 last_extent = 0;
-
 				ret = copy_items(trans, inode, dst_path, path,
-						 &last_extent, start_slot,
-						 ins_nr, 1, 0);
-				/* can't be 1, extent items aren't processed */
-				ASSERT(ret <= 0);
+						 start_slot, ins_nr, 1, 0);
 				if (ret < 0)
 					return ret;
 				ins_nr = 0;
@@ -4666,13 +4476,8 @@ static int btrfs_log_all_xattrs(struct b
 		cond_resched();
 	}
 	if (ins_nr > 0) {
-		u64 last_extent = 0;
-
 		ret = copy_items(trans, inode, dst_path, path,
-				 &last_extent, start_slot,
-				 ins_nr, 1, 0);
-		/* can't be 1, extent items aren't processed */
-		ASSERT(ret <= 0);
+				 start_slot, ins_nr, 1, 0);
 		if (ret < 0)
 			return ret;
 	}
@@ -4681,100 +4486,119 @@ static int btrfs_log_all_xattrs(struct b
 }
 
 /*
- * If the no holes feature is enabled we need to make sure any hole between the
- * last extent and the i_size of our inode is explicitly marked in the log. This
- * is to make sure that doing something like:
- *
- *      1) create file with 128Kb of data
- *      2) truncate file to 64Kb
- *      3) truncate file to 256Kb
- *      4) fsync file
- *      5) <crash/power failure>
- *      6) mount fs and trigger log replay
- *
- * Will give us a file with a size of 256Kb, the first 64Kb of data match what
- * the file had in its first 64Kb of data at step 1 and the last 192Kb of the
- * file correspond to a hole. The presence of explicit holes in a log tree is
- * what guarantees that log replay will remove/adjust file extent items in the
- * fs/subvol tree.
- *
- * Here we do not need to care about holes between extents, that is already done
- * by copy_items(). We also only need to do this in the full sync path, where we
- * lookup for extents from the fs/subvol tree only. In the fast path case, we
- * lookup the list of modified extent maps and if any represents a hole, we
- * insert a corresponding extent representing a hole in the log tree.
+ * When using the NO_HOLES feature if we punched a hole that causes the
+ * deletion of entire leafs or all the extent items of the first leaf (the one
+ * that contains the inode item and references) we may end up not processing
+ * any extents, because there are no leafs with a generation matching the
+ * current transaction that have extent items for our inode. So we need to find
+ * if any holes exist and then log them. We also need to log holes after any
+ * truncate operation that changes the inode's size.
  */
-static int btrfs_log_trailing_hole(struct btrfs_trans_handle *trans,
-				   struct btrfs_root *root,
-				   struct btrfs_inode *inode,
-				   struct btrfs_path *path)
+static int btrfs_log_holes(struct btrfs_trans_handle *trans,
+			   struct btrfs_root *root,
+			   struct btrfs_inode *inode,
+			   struct btrfs_path *path)
 {
 	struct btrfs_fs_info *fs_info = root->fs_info;
-	int ret;
 	struct btrfs_key key;
-	u64 hole_start;
-	u64 hole_size;
-	struct extent_buffer *leaf;
-	struct btrfs_root *log = root->log_root;
 	const u64 ino = btrfs_ino(inode);
 	const u64 i_size = i_size_read(&inode->vfs_inode);
+	u64 prev_extent_end = 0;
+	int ret;
 
-	if (!btrfs_fs_incompat(fs_info, NO_HOLES))
+	if (!btrfs_fs_incompat(fs_info, NO_HOLES) || i_size == 0)
 		return 0;
 
 	key.objectid = ino;
 	key.type = BTRFS_EXTENT_DATA_KEY;
-	key.offset = (u64)-1;
+	key.offset = 0;
 
 	ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
-	ASSERT(ret != 0);
 	if (ret < 0)
 		return ret;
 
-	ASSERT(path->slots[0] > 0);
-	path->slots[0]--;
-	leaf = path->nodes[0];
-	btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
-
-	if (key.objectid != ino || key.type != BTRFS_EXTENT_DATA_KEY) {
-		/* inode does not have any extents */
-		hole_start = 0;
-		hole_size = i_size;
-	} else {
+	while (true) {
 		struct btrfs_file_extent_item *extent;
+		struct extent_buffer *leaf = path->nodes[0];
 		u64 len;
 
-		/*
-		 * If there's an extent beyond i_size, an explicit hole was
-		 * already inserted by copy_items().
-		 */
-		if (key.offset >= i_size)
-			return 0;
+		if (path->slots[0] >= btrfs_header_nritems(path->nodes[0])) {
+			ret = btrfs_next_leaf(root, path);
+			if (ret < 0)
+				return ret;
+			if (ret > 0) {
+				ret = 0;
+				break;
+			}
+			leaf = path->nodes[0];
+		}
+
+		btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
+		if (key.objectid != ino || key.type != BTRFS_EXTENT_DATA_KEY)
+			break;
+
+		/* We have a hole, log it. */
+		if (prev_extent_end < key.offset) {
+			const u64 hole_len = key.offset - prev_extent_end;
+
+			/*
+			 * Release the path to avoid deadlocks with other code
+			 * paths that search the root while holding locks on
+			 * leafs from the log root.
+			 */
+			btrfs_release_path(path);
+			ret = btrfs_insert_file_extent(trans, root->log_root,
+						       ino, prev_extent_end, 0,
+						       0, hole_len, 0, hole_len,
+						       0, 0, 0);
+			if (ret < 0)
+				return ret;
+
+			/*
+			 * Search for the same key again in the root. Since it's
+			 * an extent item and we are holding the inode lock, the
+			 * key must still exist. If it doesn't just emit warning
+			 * and return an error to fall back to a transaction
+			 * commit.
+			 */
+			ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+			if (ret < 0)
+				return ret;
+			if (WARN_ON(ret > 0))
+				return -ENOENT;
+			leaf = path->nodes[0];
+		}
 
 		extent = btrfs_item_ptr(leaf, path->slots[0],
 					struct btrfs_file_extent_item);
-
 		if (btrfs_file_extent_type(leaf, extent) ==
-		    BTRFS_FILE_EXTENT_INLINE)
-			return 0;
+		    BTRFS_FILE_EXTENT_INLINE) {
+			len = btrfs_file_extent_ram_bytes(leaf, extent);
+			prev_extent_end = ALIGN(key.offset + len,
+						fs_info->sectorsize);
+		} else {
+			len = btrfs_file_extent_num_bytes(leaf, extent);
+			prev_extent_end = key.offset + len;
+		}
 
-		len = btrfs_file_extent_num_bytes(leaf, extent);
-		/* Last extent goes beyond i_size, no need to log a hole. */
-		if (key.offset + len > i_size)
-			return 0;
-		hole_start = key.offset + len;
-		hole_size = i_size - hole_start;
+		path->slots[0]++;
+		cond_resched();
 	}
-	btrfs_release_path(path);
 
-	/* Last extent ends at i_size. */
-	if (hole_size == 0)
-		return 0;
+	if (prev_extent_end < i_size) {
+		u64 hole_len;
 
-	hole_size = ALIGN(hole_size, fs_info->sectorsize);
-	ret = btrfs_insert_file_extent(trans, log, ino, hole_start, 0, 0,
-				       hole_size, 0, hole_size, 0, 0, 0);
-	return ret;
+		btrfs_release_path(path);
+		hole_len = ALIGN(i_size - prev_extent_end, fs_info->sectorsize);
+		ret = btrfs_insert_file_extent(trans, root->log_root,
+					       ino, prev_extent_end, 0, 0,
+					       hole_len, 0, hole_len,
+					       0, 0, 0);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
 }
 
 /*
@@ -4934,7 +4758,6 @@ static int btrfs_log_inode(struct btrfs_
 	struct btrfs_key min_key;
 	struct btrfs_key max_key;
 	struct btrfs_root *log = root->log_root;
-	u64 last_extent = 0;
 	int err = 0;
 	int ret;
 	int nritems;
@@ -5108,7 +4931,7 @@ again:
 					ins_start_slot = path->slots[0];
 				}
 				ret = copy_items(trans, inode, dst_path, path,
-						 &last_extent, ins_start_slot,
+						 ins_start_slot,
 						 ins_nr, inode_only,
 						 logged_isize);
 				if (ret < 0) {
@@ -5161,17 +4984,13 @@ again:
 			if (ins_nr == 0)
 				goto next_slot;
 			ret = copy_items(trans, inode, dst_path, path,
-					 &last_extent, ins_start_slot,
+					 ins_start_slot,
 					 ins_nr, inode_only, logged_isize);
 			if (ret < 0) {
 				err = ret;
 				goto out_unlock;
 			}
 			ins_nr = 0;
-			if (ret) {
-				btrfs_release_path(path);
-				continue;
-			}
 			goto next_slot;
 		}
 
@@ -5184,18 +5003,13 @@ again:
 			goto next_slot;
 		}
 
-		ret = copy_items(trans, inode, dst_path, path, &last_extent,
+		ret = copy_items(trans, inode, dst_path, path,
 				 ins_start_slot, ins_nr, inode_only,
 				 logged_isize);
 		if (ret < 0) {
 			err = ret;
 			goto out_unlock;
 		}
-		if (ret) {
-			ins_nr = 0;
-			btrfs_release_path(path);
-			continue;
-		}
 		ins_nr = 1;
 		ins_start_slot = path->slots[0];
 next_slot:
@@ -5209,13 +5023,12 @@ next_slot:
 		}
 		if (ins_nr) {
 			ret = copy_items(trans, inode, dst_path, path,
-					 &last_extent, ins_start_slot,
+					 ins_start_slot,
 					 ins_nr, inode_only, logged_isize);
 			if (ret < 0) {
 				err = ret;
 				goto out_unlock;
 			}
-			ret = 0;
 			ins_nr = 0;
 		}
 		btrfs_release_path(path);
@@ -5230,14 +5043,13 @@ next_key:
 		}
 	}
 	if (ins_nr) {
-		ret = copy_items(trans, inode, dst_path, path, &last_extent,
+		ret = copy_items(trans, inode, dst_path, path,
 				 ins_start_slot, ins_nr, inode_only,
 				 logged_isize);
 		if (ret < 0) {
 			err = ret;
 			goto out_unlock;
 		}
-		ret = 0;
 		ins_nr = 0;
 	}
 
@@ -5250,7 +5062,7 @@ next_key:
 	if (max_key.type >= BTRFS_EXTENT_DATA_KEY && !fast_search) {
 		btrfs_release_path(path);
 		btrfs_release_path(dst_path);
-		err = btrfs_log_trailing_hole(trans, root, inode, path);
+		err = btrfs_log_holes(trans, root, inode, path);
 		if (err)
 			goto out_unlock;
 	}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 107/195] btrfs: set trans->drity in btrfs_commit_transaction
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (105 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 106/195] Btrfs: fix missing hole after hole punching and fsync when using NO_HOLES Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 108/195] Btrfs: fix race between adding and putting tree mod seq elements and nodes Greg Kroah-Hartman
                   ` (91 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Josef Bacik, David Sterba

From: Josef Bacik <josef@toxicpanda.com>

commit d62b23c94952e78211a383b7d90ef0afbd9a3717 upstream.

If we abort a transaction we have the following sequence

if (!trans->dirty && list_empty(&trans->new_bgs))
	return;
WRITE_ONCE(trans->transaction->aborted, err);

The idea being if we didn't modify anything with our trans handle then
we don't really need to abort the whole transaction, maybe the other
trans handles are fine and we can carry on.

However in the case of create_snapshot we add a pending_snapshot object
to our transaction and then commit the transaction.  We don't actually
modify anything.  sync() behaves the same way, attach to an existing
transaction and commit it.  This means that if we have an IO error in
the right places we could abort the committing transaction with our
trans->dirty being not set and thus not set transaction->aborted.

This is a problem because in the create_snapshot() case we depend on
pending->error being set to something, or btrfs_commit_transaction
returning an error.

If we are not the trans handle that gets to commit the transaction, and
we're waiting on the commit to happen we get our return value from
cur_trans->aborted.  If this was not set to anything because sync() hit
an error in the transaction commit before it could modify anything then
cur_trans->aborted would be 0.  Thus we'd return 0 from
btrfs_commit_transaction() in create_snapshot.

This is a problem because we then try to do things with
pending_snapshot->snap, which will be NULL because we didn't create the
snapshot, and then we'll get a NULL pointer dereference like the
following

"BUG: kernel NULL pointer dereference, address: 00000000000001f0"
RIP: 0010:btrfs_orphan_cleanup+0x2d/0x330
Call Trace:
 ? btrfs_mksubvol.isra.31+0x3f2/0x510
 btrfs_mksubvol.isra.31+0x4bc/0x510
 ? __sb_start_write+0xfa/0x200
 ? mnt_want_write_file+0x24/0x50
 btrfs_ioctl_snap_create_transid+0x16c/0x1a0
 btrfs_ioctl_snap_create_v2+0x11e/0x1a0
 btrfs_ioctl+0x1534/0x2c10
 ? free_debug_processing+0x262/0x2a3
 do_vfs_ioctl+0xa6/0x6b0
 ? do_sys_open+0x188/0x220
 ? syscall_trace_enter+0x1f8/0x330
 ksys_ioctl+0x60/0x90
 __x64_sys_ioctl+0x16/0x20
 do_syscall_64+0x4a/0x1b0

In order to fix this we need to make sure anybody who calls
commit_transaction has trans->dirty set so that they properly set the
trans->transaction->aborted value properly so any waiters know bad
things happened.

This was found while I was running generic/475 with my modified
fsstress, it reproduced within a few runs.  I ran with this patch all
night and didn't see the problem again.

CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/btrfs/transaction.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1936,6 +1936,14 @@ int btrfs_commit_transaction(struct btrf
 	struct btrfs_transaction *prev_trans = NULL;
 	int ret;
 
+	/*
+	 * Some places just start a transaction to commit it.  We need to make
+	 * sure that if this commit fails that the abort code actually marks the
+	 * transaction as failed, so set trans->dirty to make the abort code do
+	 * the right thing.
+	 */
+	trans->dirty = true;
+
 	/* Stop the commit early if ->aborted is set */
 	if (unlikely(READ_ONCE(cur_trans->aborted))) {
 		ret = cur_trans->aborted;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 108/195] Btrfs: fix race between adding and putting tree mod seq elements and nodes
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (106 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 107/195] btrfs: set trans->drity in btrfs_commit_transaction Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 109/195] ARM: tegra: Enable PLLP bypass during Tegra124 LP1 Greg Kroah-Hartman
                   ` (90 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Josef Bacik, Nikolay Borisov,
	Filipe Manana, David Sterba

From: Filipe Manana <fdmanana@suse.com>

commit 7227ff4de55d931bbdc156c8ef0ce4f100c78a5b upstream.

There is a race between adding and removing elements to the tree mod log
list and rbtree that can lead to use-after-free problems.

Consider the following example that explains how/why the problems happens:

1) Task A has mod log element with sequence number 200. It currently is
   the only element in the mod log list;

2) Task A calls btrfs_put_tree_mod_seq() because it no longer needs to
   access the tree mod log. When it enters the function, it initializes
   'min_seq' to (u64)-1. Then it acquires the lock 'tree_mod_seq_lock'
   before checking if there are other elements in the mod seq list.
   Since the list it empty, 'min_seq' remains set to (u64)-1. Then it
   unlocks the lock 'tree_mod_seq_lock';

3) Before task A acquires the lock 'tree_mod_log_lock', task B adds
   itself to the mod seq list through btrfs_get_tree_mod_seq() and gets a
   sequence number of 201;

4) Some other task, name it task C, modifies a btree and because there
   elements in the mod seq list, it adds a tree mod elem to the tree
   mod log rbtree. That node added to the mod log rbtree is assigned
   a sequence number of 202;

5) Task B, which is doing fiemap and resolving indirect back references,
   calls btrfs get_old_root(), with 'time_seq' == 201, which in turn
   calls tree_mod_log_search() - the search returns the mod log node
   from the rbtree with sequence number 202, created by task C;

6) Task A now acquires the lock 'tree_mod_log_lock', starts iterating
   the mod log rbtree and finds the node with sequence number 202. Since
   202 is less than the previously computed 'min_seq', (u64)-1, it
   removes the node and frees it;

7) Task B still has a pointer to the node with sequence number 202, and
   it dereferences the pointer itself and through the call to
   __tree_mod_log_rewind(), resulting in a use-after-free problem.

This issue can be triggered sporadically with the test case generic/561
from fstests, and it happens more frequently with a higher number of
duperemove processes. When it happens to me, it either freezes the VM or
it produces a trace like the following before crashing:

  [ 1245.321140] general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI
  [ 1245.321200] CPU: 1 PID: 26997 Comm: pool Not tainted 5.5.0-rc6-btrfs-next-52 #1
  [ 1245.321235] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 04/01/2014
  [ 1245.321287] RIP: 0010:rb_next+0x16/0x50
  [ 1245.321307] Code: ....
  [ 1245.321372] RSP: 0018:ffffa151c4d039b0 EFLAGS: 00010202
  [ 1245.321388] RAX: 6b6b6b6b6b6b6b6b RBX: ffff8ae221363c80 RCX: 6b6b6b6b6b6b6b6b
  [ 1245.321409] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8ae221363c80
  [ 1245.321439] RBP: ffff8ae20fcc4688 R08: 0000000000000002 R09: 0000000000000000
  [ 1245.321475] R10: ffff8ae20b120910 R11: 00000000243f8bb1 R12: 0000000000000038
  [ 1245.321506] R13: ffff8ae221363c80 R14: 000000000000075f R15: ffff8ae223f762b8
  [ 1245.321539] FS:  00007fdee1ec7700(0000) GS:ffff8ae236c80000(0000) knlGS:0000000000000000
  [ 1245.321591] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [ 1245.321614] CR2: 00007fded4030c48 CR3: 000000021da16003 CR4: 00000000003606e0
  [ 1245.321642] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  [ 1245.321668] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  [ 1245.321706] Call Trace:
  [ 1245.321798]  __tree_mod_log_rewind+0xbf/0x280 [btrfs]
  [ 1245.321841]  btrfs_search_old_slot+0x105/0xd00 [btrfs]
  [ 1245.321877]  resolve_indirect_refs+0x1eb/0xc60 [btrfs]
  [ 1245.321912]  find_parent_nodes+0x3dc/0x11b0 [btrfs]
  [ 1245.321947]  btrfs_check_shared+0x115/0x1c0 [btrfs]
  [ 1245.321980]  ? extent_fiemap+0x59d/0x6d0 [btrfs]
  [ 1245.322029]  extent_fiemap+0x59d/0x6d0 [btrfs]
  [ 1245.322066]  do_vfs_ioctl+0x45a/0x750
  [ 1245.322081]  ksys_ioctl+0x70/0x80
  [ 1245.322092]  ? trace_hardirqs_off_thunk+0x1a/0x1c
  [ 1245.322113]  __x64_sys_ioctl+0x16/0x20
  [ 1245.322126]  do_syscall_64+0x5c/0x280
  [ 1245.322139]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
  [ 1245.322155] RIP: 0033:0x7fdee3942dd7
  [ 1245.322177] Code: ....
  [ 1245.322258] RSP: 002b:00007fdee1ec6c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
  [ 1245.322294] RAX: ffffffffffffffda RBX: 00007fded40210d8 RCX: 00007fdee3942dd7
  [ 1245.322314] RDX: 00007fded40210d8 RSI: 00000000c020660b RDI: 0000000000000004
  [ 1245.322337] RBP: 0000562aa89e7510 R08: 0000000000000000 R09: 00007fdee1ec6d44
  [ 1245.322369] R10: 0000000000000073 R11: 0000000000000246 R12: 00007fdee1ec6d48
  [ 1245.322390] R13: 00007fdee1ec6d40 R14: 00007fded40210d0 R15: 00007fdee1ec6d50
  [ 1245.322423] Modules linked in: ....
  [ 1245.323443] ---[ end trace 01de1e9ec5dff3cd ]---

Fix this by ensuring that btrfs_put_tree_mod_seq() computes the minimum
sequence number and iterates the rbtree while holding the lock
'tree_mod_log_lock' in write mode. Also get rid of the 'tree_mod_seq_lock'
lock, since it is now redundant.

Fixes: bd989ba359f2ac ("Btrfs: add tree modification log functions")
Fixes: 097b8a7c9e48e2 ("Btrfs: join tree mod log code with the code holding back delayed refs")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/btrfs/ctree.c             |    8 ++------
 fs/btrfs/ctree.h             |    6 ++----
 fs/btrfs/delayed-ref.c       |    8 ++++----
 fs/btrfs/disk-io.c           |    1 -
 fs/btrfs/tests/btrfs-tests.c |    1 -
 5 files changed, 8 insertions(+), 16 deletions(-)

--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -337,12 +337,10 @@ u64 btrfs_get_tree_mod_seq(struct btrfs_
 			   struct seq_list *elem)
 {
 	write_lock(&fs_info->tree_mod_log_lock);
-	spin_lock(&fs_info->tree_mod_seq_lock);
 	if (!elem->seq) {
 		elem->seq = btrfs_inc_tree_mod_seq(fs_info);
 		list_add_tail(&elem->list, &fs_info->tree_mod_seq_list);
 	}
-	spin_unlock(&fs_info->tree_mod_seq_lock);
 	write_unlock(&fs_info->tree_mod_log_lock);
 
 	return elem->seq;
@@ -362,7 +360,7 @@ void btrfs_put_tree_mod_seq(struct btrfs
 	if (!seq_putting)
 		return;
 
-	spin_lock(&fs_info->tree_mod_seq_lock);
+	write_lock(&fs_info->tree_mod_log_lock);
 	list_del(&elem->list);
 	elem->seq = 0;
 
@@ -373,19 +371,17 @@ void btrfs_put_tree_mod_seq(struct btrfs
 				 * blocker with lower sequence number exists, we
 				 * cannot remove anything from the log
 				 */
-				spin_unlock(&fs_info->tree_mod_seq_lock);
+				write_unlock(&fs_info->tree_mod_log_lock);
 				return;
 			}
 			min_seq = cur_elem->seq;
 		}
 	}
-	spin_unlock(&fs_info->tree_mod_seq_lock);
 
 	/*
 	 * anything that's lower than the lowest existing (read: blocked)
 	 * sequence number can be removed from the tree.
 	 */
-	write_lock(&fs_info->tree_mod_log_lock);
 	tm_root = &fs_info->tree_mod_log;
 	for (node = rb_first(tm_root); node; node = next) {
 		next = rb_next(node);
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -893,14 +893,12 @@ struct btrfs_fs_info {
 	struct list_head delayed_iputs;
 	struct mutex cleaner_delayed_iput_mutex;
 
-	/* this protects tree_mod_seq_list */
-	spinlock_t tree_mod_seq_lock;
 	atomic64_t tree_mod_seq;
-	struct list_head tree_mod_seq_list;
 
-	/* this protects tree_mod_log */
+	/* this protects tree_mod_log and tree_mod_seq_list */
 	rwlock_t tree_mod_log_lock;
 	struct rb_root tree_mod_log;
+	struct list_head tree_mod_seq_list;
 
 	atomic_t async_delalloc_pages;
 
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -301,7 +301,7 @@ void btrfs_merge_delayed_refs(struct btr
 	if (head->is_data)
 		return;
 
-	spin_lock(&fs_info->tree_mod_seq_lock);
+	read_lock(&fs_info->tree_mod_log_lock);
 	if (!list_empty(&fs_info->tree_mod_seq_list)) {
 		struct seq_list *elem;
 
@@ -309,7 +309,7 @@ void btrfs_merge_delayed_refs(struct btr
 					struct seq_list, list);
 		seq = elem->seq;
 	}
-	spin_unlock(&fs_info->tree_mod_seq_lock);
+	read_unlock(&fs_info->tree_mod_log_lock);
 
 again:
 	for (node = rb_first(&head->ref_tree); node; node = rb_next(node)) {
@@ -326,7 +326,7 @@ int btrfs_check_delayed_seq(struct btrfs
 	struct seq_list *elem;
 	int ret = 0;
 
-	spin_lock(&fs_info->tree_mod_seq_lock);
+	read_lock(&fs_info->tree_mod_log_lock);
 	if (!list_empty(&fs_info->tree_mod_seq_list)) {
 		elem = list_first_entry(&fs_info->tree_mod_seq_list,
 					struct seq_list, list);
@@ -339,7 +339,7 @@ int btrfs_check_delayed_seq(struct btrfs
 		}
 	}
 
-	spin_unlock(&fs_info->tree_mod_seq_lock);
+	read_unlock(&fs_info->tree_mod_log_lock);
 	return ret;
 }
 
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2645,7 +2645,6 @@ int open_ctree(struct super_block *sb,
 	spin_lock_init(&fs_info->fs_roots_radix_lock);
 	spin_lock_init(&fs_info->delayed_iput_lock);
 	spin_lock_init(&fs_info->defrag_inodes_lock);
-	spin_lock_init(&fs_info->tree_mod_seq_lock);
 	spin_lock_init(&fs_info->super_lock);
 	spin_lock_init(&fs_info->qgroup_op_lock);
 	spin_lock_init(&fs_info->buffer_lock);
--- a/fs/btrfs/tests/btrfs-tests.c
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -102,7 +102,6 @@ struct btrfs_fs_info *btrfs_alloc_dummy_
 	spin_lock_init(&fs_info->qgroup_op_lock);
 	spin_lock_init(&fs_info->super_lock);
 	spin_lock_init(&fs_info->fs_roots_radix_lock);
-	spin_lock_init(&fs_info->tree_mod_seq_lock);
 	mutex_init(&fs_info->qgroup_ioctl_lock);
 	mutex_init(&fs_info->qgroup_rescan_lock);
 	rwlock_init(&fs_info->tree_mod_log_lock);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 109/195] ARM: tegra: Enable PLLP bypass during Tegra124 LP1
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (107 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 108/195] Btrfs: fix race between adding and putting tree mod seq elements and nodes Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 110/195] iwlwifi: dont throw error when trying to remove IGTK Greg Kroah-Hartman
                   ` (89 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Jonathan Hunter, Stephen Warren,
	Thierry Reding

From: Stephen Warren <swarren@nvidia.com>

commit 1a3388d506bf5b45bb283e6a4c4706cfb4897333 upstream.

For a little over a year, U-Boot has configured the flow controller to
perform automatic RAM re-repair on off->on power transitions of the CPU
rail[1]. This is mandatory for correct operation of Tegra124. However,
RAM re-repair relies on certain clocks, which the kernel must enable and
leave running. PLLP is one of those clocks. This clock is shut down
during LP1 in order to save power. Enable bypass (which I believe routes
osc_div_clk, essentially the crystal clock, to the PLL output) so that
this clock signal toggles even though the PLL is not active. This is
required so that LP1 power mode (system suspend) operates correctly.

The bypass configuration must then be undone when resuming from LP1, so
that all peripheral clocks run at the expected rate. Without this, many
peripherals won't work correctly; for example, the UART baud rate would
be incorrect.

NVIDIA's downstream kernel code only does this if not compiled for
Tegra30, so the added code is made conditional upon the chip ID.
NVIDIA's downstream code makes this change conditional upon the active
CPU cluster. The upstream kernel currently doesn't support cluster
switching, so this patch doesn't test the active CPU cluster ID.

[1] 3cc7942a4ae5 ARM: tegra: implement RAM repair

Reported-by: Jonathan Hunter <jonathanh@nvidia.com>
Cc: stable@vger.kernel.org
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/mach-tegra/sleep-tegra30.S |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/arch/arm/mach-tegra/sleep-tegra30.S
+++ b/arch/arm/mach-tegra/sleep-tegra30.S
@@ -382,6 +382,14 @@ _pll_m_c_x_done:
 	pll_locked r1, r0, CLK_RESET_PLLC_BASE
 	pll_locked r1, r0, CLK_RESET_PLLX_BASE
 
+	tegra_get_soc_id TEGRA_APB_MISC_BASE, r1
+	cmp	r1, #TEGRA30
+	beq	1f
+	ldr	r1, [r0, #CLK_RESET_PLLP_BASE]
+	bic	r1, r1, #(1<<31)	@ disable PllP bypass
+	str	r1, [r0, #CLK_RESET_PLLP_BASE]
+1:
+
 	mov32	r7, TEGRA_TMRUS_BASE
 	ldr	r1, [r7]
 	add	r1, r1, #LOCK_DELAY
@@ -641,7 +649,10 @@ tegra30_switch_cpu_to_clk32k:
 	str	r0, [r4, #PMC_PLLP_WB0_OVERRIDE]
 
 	/* disable PLLP, PLLA, PLLC and PLLX */
+	tegra_get_soc_id TEGRA_APB_MISC_BASE, r1
+	cmp	r1, #TEGRA30
 	ldr	r0, [r5, #CLK_RESET_PLLP_BASE]
+	orrne	r0, r0, #(1 << 31)	@ enable PllP bypass on fast cluster
 	bic	r0, r0, #(1 << 30)
 	str	r0, [r5, #CLK_RESET_PLLP_BASE]
 	ldr	r0, [r5, #CLK_RESET_PLLA_BASE]



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 110/195] iwlwifi: dont throw error when trying to remove IGTK
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (108 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 109/195] ARM: tegra: Enable PLLP bypass during Tegra124 LP1 Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 111/195] mwifiex: fix unbalanced locking in mwifiex_process_country_ie() Greg Kroah-Hartman
                   ` (88 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Luca Coelho, Kalle Valo

From: Luca Coelho <luciano.coelho@intel.com>

commit 197288d5ba8a5289f22d3aeb4fca3824bfd9b4af upstream.

The IGTK keys are only removed by mac80211 after it has already
removed the AP station.  This causes the driver to throw an error
because mac80211 is trying to remove the IGTK when the station doesn't
exist anymore.

The firmware is aware that the station has been removed and can deal
with it the next time we try to add an IGTK for a station, so we
shouldn't try to remove the key if the station ID is
IWL_MVM_INVALID_STA.  Do this by removing the check for mvm_sta before
calling iwl_mvm_send_sta_igtk() and check return from that function
gracefully if the station ID is invalid.

Cc: stable@vger.kernel.org # 4.12+
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/intel/iwlwifi/mvm/sta.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -3045,6 +3045,10 @@ static int iwl_mvm_send_sta_igtk(struct
 	igtk_cmd.sta_id = cpu_to_le32(sta_id);
 
 	if (remove_key) {
+		/* This is a valid situation for IGTK */
+		if (sta_id == IWL_MVM_INVALID_STA)
+			return 0;
+
 		igtk_cmd.ctrl_flags |= cpu_to_le32(STA_KEY_NOT_VALID);
 	} else {
 		struct ieee80211_key_seq seq;
@@ -3352,9 +3356,9 @@ int iwl_mvm_remove_sta_key(struct iwl_mv
 	IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
 		      keyconf->keyidx, sta_id);
 
-	if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
-			keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
-			keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
+	if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
+	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
+	    keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
 		return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
 
 	if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 111/195] mwifiex: fix unbalanced locking in mwifiex_process_country_ie()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (109 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 110/195] iwlwifi: dont throw error when trying to remove IGTK Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 112/195] sunrpc: expiry_time should be seconds not timeval Greg Kroah-Hartman
                   ` (87 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, huangwen, Ganapathi Bhat,
	Brian Norris, Kalle Valo

From: Brian Norris <briannorris@chromium.org>

commit 65b1aae0d9d5962faccc06bdb8e91a2a0b09451c upstream.

We called rcu_read_lock(), so we need to call rcu_read_unlock() before
we return.

Fixes: 3d94a4a8373b ("mwifiex: fix possible heap overflow in mwifiex_process_country_ie()")
Cc: stable@vger.kernel.org
Cc: huangwen <huangwenabc@gmail.com>
Cc: Ganapathi Bhat <ganapathi.bhat@nxp.com>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Acked-by: Ganapathi Bhat <ganapathi.bhat@nxp.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/marvell/mwifiex/sta_ioctl.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
@@ -232,6 +232,7 @@ static int mwifiex_process_country_ie(st
 
 	if (country_ie_len >
 	    (IEEE80211_COUNTRY_STRING_LEN + MWIFIEX_MAX_TRIPLET_802_11D)) {
+		rcu_read_unlock();
 		mwifiex_dbg(priv->adapter, ERROR,
 			    "11D: country_ie_len overflow!, deauth AP\n");
 		return -EINVAL;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 112/195] sunrpc: expiry_time should be seconds not timeval
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (110 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 111/195] mwifiex: fix unbalanced locking in mwifiex_process_country_ie() Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 113/195] gfs2: move setting current->backing_dev_info Greg Kroah-Hartman
                   ` (86 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Roberto Bergantinos Corpas,
	Frank Sorenson, J. Bruce Fields

From: Roberto Bergantinos Corpas <rbergant@redhat.com>

commit 3d96208c30f84d6edf9ab4fac813306ac0d20c10 upstream.

When upcalling gssproxy, cache_head.expiry_time is set as a
timeval, not seconds since boot. As such, RPC cache expiry
logic will not clean expired objects created under
auth.rpcsec.context cache.

This has proven to cause kernel memory leaks on field. Using
64 bit variants of getboottime/timespec

Expiration times have worked this way since 2010's c5b29f885afe "sunrpc:
use seconds since boot in expiry cache".  The gssproxy code introduced
in 2012 added gss_proxy_save_rsc and introduced the bug.  That's a while
for this to lurk, but it required a bit of an extreme case to make it
obvious.

Signed-off-by: Roberto Bergantinos Corpas <rbergant@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 030d794bf498 "SUNRPC: Use gssproxy upcall for server..."
Tested-By: Frank Sorenson <sorenson@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/sunrpc/auth_gss/svcauth_gss.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -1224,6 +1224,7 @@ static int gss_proxy_save_rsc(struct cac
 		dprintk("RPC:       No creds found!\n");
 		goto out;
 	} else {
+		struct timespec64 boot;
 
 		/* steal creds */
 		rsci.cred = ud->creds;
@@ -1244,6 +1245,9 @@ static int gss_proxy_save_rsc(struct cac
 						&expiry, GFP_KERNEL);
 		if (status)
 			goto out;
+
+		getboottime64(&boot);
+		expiry -= boot.tv_sec;
 	}
 
 	rsci.h.expiry_time = expiry;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 113/195] gfs2: move setting current->backing_dev_info
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (111 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 112/195] sunrpc: expiry_time should be seconds not timeval Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 114/195] gfs2: fix O_SYNC write handling Greg Kroah-Hartman
                   ` (85 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Christoph Hellwig, Andreas Gruenbacher

From: Christoph Hellwig <hch@lst.de>

commit 4c0e8dda608a51855225c611b5c6b442f95fbc56 upstream.

Set current->backing_dev_info just around the buffered write calls to
prepare for the next fix.

Fixes: 967bcc91b044 ("gfs2: iomap direct I/O support")
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/gfs2/file.c |   21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -800,18 +800,15 @@ static ssize_t gfs2_file_write_iter(stru
 	inode_lock(inode);
 	ret = generic_write_checks(iocb, from);
 	if (ret <= 0)
-		goto out;
-
-	/* We can write back this queue in page reclaim */
-	current->backing_dev_info = inode_to_bdi(inode);
+		goto out_unlock;
 
 	ret = file_remove_privs(file);
 	if (ret)
-		goto out2;
+		goto out_unlock;
 
 	ret = file_update_time(file);
 	if (ret)
-		goto out2;
+		goto out_unlock;
 
 	if (iocb->ki_flags & IOCB_DIRECT) {
 		struct address_space *mapping = file->f_mapping;
@@ -820,11 +817,13 @@ static ssize_t gfs2_file_write_iter(stru
 
 		written = gfs2_file_direct_write(iocb, from);
 		if (written < 0 || !iov_iter_count(from))
-			goto out2;
+			goto out_unlock;
 
+		current->backing_dev_info = inode_to_bdi(inode);
 		ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
+		current->backing_dev_info = NULL;
 		if (unlikely(ret < 0))
-			goto out2;
+			goto out_unlock;
 		buffered = ret;
 
 		/*
@@ -848,14 +847,14 @@ static ssize_t gfs2_file_write_iter(stru
 			 */
 		}
 	} else {
+		current->backing_dev_info = inode_to_bdi(inode);
 		ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
+		current->backing_dev_info = NULL;
 		if (likely(ret > 0))
 			iocb->ki_pos += ret;
 	}
 
-out2:
-	current->backing_dev_info = NULL;
-out:
+out_unlock:
 	inode_unlock(inode);
 	if (likely(ret > 0)) {
 		/* Handle various SYNC-type writes */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 114/195] gfs2: fix O_SYNC write handling
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (112 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 113/195] gfs2: move setting current->backing_dev_info Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 115/195] drm/rect: Avoid division by zero Greg Kroah-Hartman
                   ` (84 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Andreas Gruenbacher

From: Andreas Gruenbacher <agruenba@redhat.com>

commit 6e5e41e2dc4e4413296d5a4af54ac92d7cd52317 upstream.

In gfs2_file_write_iter, for direct writes, the error checking in the buffered
write fallback case is incomplete.  This can cause inode write errors to go
undetected.  Fix and clean up gfs2_file_write_iter along the way.

Based on a proposed fix by Christoph Hellwig <hch@lst.de>.

Fixes: 967bcc91b044 ("gfs2: iomap direct I/O support")
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/gfs2/file.c |   51 +++++++++++++++++++++------------------------------
 1 file changed, 21 insertions(+), 30 deletions(-)

--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -780,7 +780,7 @@ static ssize_t gfs2_file_write_iter(stru
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file_inode(file);
 	struct gfs2_inode *ip = GFS2_I(inode);
-	ssize_t written = 0, ret;
+	ssize_t ret;
 
 	ret = gfs2_rsqa_alloc(ip);
 	if (ret)
@@ -812,55 +812,46 @@ static ssize_t gfs2_file_write_iter(stru
 
 	if (iocb->ki_flags & IOCB_DIRECT) {
 		struct address_space *mapping = file->f_mapping;
-		loff_t pos, endbyte;
-		ssize_t buffered;
+		ssize_t buffered, ret2;
 
-		written = gfs2_file_direct_write(iocb, from);
-		if (written < 0 || !iov_iter_count(from))
+		ret = gfs2_file_direct_write(iocb, from);
+		if (ret < 0 || !iov_iter_count(from))
 			goto out_unlock;
 
+		iocb->ki_flags |= IOCB_DSYNC;
 		current->backing_dev_info = inode_to_bdi(inode);
-		ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
+		buffered = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
 		current->backing_dev_info = NULL;
-		if (unlikely(ret < 0))
+		if (unlikely(buffered <= 0))
 			goto out_unlock;
-		buffered = ret;
 
 		/*
 		 * We need to ensure that the page cache pages are written to
 		 * disk and invalidated to preserve the expected O_DIRECT
-		 * semantics.
+		 * semantics.  If the writeback or invalidate fails, only report
+		 * the direct I/O range as we don't know if the buffered pages
+		 * made it to disk.
 		 */
-		pos = iocb->ki_pos;
-		endbyte = pos + buffered - 1;
-		ret = filemap_write_and_wait_range(mapping, pos, endbyte);
-		if (!ret) {
-			iocb->ki_pos += buffered;
-			written += buffered;
-			invalidate_mapping_pages(mapping,
-						 pos >> PAGE_SHIFT,
-						 endbyte >> PAGE_SHIFT);
-		} else {
-			/*
-			 * We don't know how much we wrote, so just return
-			 * the number of bytes which were direct-written
-			 */
-		}
+		iocb->ki_pos += buffered;
+		ret2 = generic_write_sync(iocb, buffered);
+		invalidate_mapping_pages(mapping,
+				(iocb->ki_pos - buffered) >> PAGE_SHIFT,
+				(iocb->ki_pos - 1) >> PAGE_SHIFT);
+		if (!ret || ret2 > 0)
+			ret += ret2;
 	} else {
 		current->backing_dev_info = inode_to_bdi(inode);
 		ret = iomap_file_buffered_write(iocb, from, &gfs2_iomap_ops);
 		current->backing_dev_info = NULL;
-		if (likely(ret > 0))
+		if (likely(ret > 0)) {
 			iocb->ki_pos += ret;
+			ret = generic_write_sync(iocb, ret);
+		}
 	}
 
 out_unlock:
 	inode_unlock(inode);
-	if (likely(ret > 0)) {
-		/* Handle various SYNC-type writes */
-		ret = generic_write_sync(iocb, ret);
-	}
-	return written ? written : ret;
+	return ret;
 }
 
 static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 115/195] drm/rect: Avoid division by zero
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (113 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 114/195] gfs2: fix O_SYNC write handling Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 116/195] media: rc: ensure lirc is initialized before registering input device Greg Kroah-Hartman
                   ` (83 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Maarten Lankhorst, Benjamin Gaignard,
	Daniel Vetter, Ville Syrjälä,
	Daniel Vetter

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

commit 433480c1afd44f3e1e664b85063d98cefeefa0ed upstream.

Check for zero width/height destination rectangle in
drm_rect_clip_scaled() to avoid a division by zero.

Cc: stable@vger.kernel.org
Fixes: f96bdf564f3e ("drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.")
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Benjamin Gaignard <benjamin.gaignard@st.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Testcase: igt/kms_selftest/drm_rect_clip_scaled_div_by_zero
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191122175623.13565-2-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/drm_rect.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/drm_rect.c
+++ b/drivers/gpu/drm/drm_rect.c
@@ -52,7 +52,12 @@ EXPORT_SYMBOL(drm_rect_intersect);
 
 static u32 clip_scaled(u32 src, u32 dst, u32 clip)
 {
-	u64 tmp = mul_u32_u32(src, dst - clip);
+	u64 tmp;
+
+	if (dst == 0)
+		return 0;
+
+	tmp = mul_u32_u32(src, dst - clip);
 
 	/*
 	 * Round toward 1.0 when clipping so that we don't accidentally



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 116/195] media: rc: ensure lirc is initialized before registering input device
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (114 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 115/195] drm/rect: Avoid division by zero Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 117/195] tools/kvm_stat: Fix kvm_exit filter name Greg Kroah-Hartman
                   ` (82 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick French, Sean Young,
	Mauro Carvalho Chehab

From: Sean Young <sean@mess.org>

commit 080d89f522e2baddb4fbbd1af4b67b5f92537ef8 upstream.

Once rc_open is called on the input device, lirc events can be delivered.
Ensure lirc is ready to do so else we might get this:

Registered IR keymap rc-hauppauge
rc rc0: Hauppauge WinTV PVR-350 as
/devices/pci0000:00/0000:00:1e.0/0000:04:00.0/i2c-0/0-0018/rc/rc0
input: Hauppauge WinTV PVR-350 as
/devices/pci0000:00/0000:00:1e.0/0000:04:00.0/i2c-0/0-0018/rc/rc0/input9
BUG: kernel NULL pointer dereference, address: 0000000000000038
PGD 0 P4D 0
Oops: 0000 [#1] SMP PTI
CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.11-300.fc31.x86_64 #1
Hardware name:  /DG43NB, BIOS NBG4310H.86A.0096.2009.0903.1845 09/03/2009
Workqueue: events ir_work [ir_kbd_i2c]
RIP: 0010:ir_lirc_scancode_event+0x3d/0xb0
Code: a6 b4 07 00 00 49 81 c6 b8 07 00 00 55 53 e8 ba a7 9d ff 4c 89
e7 49 89 45 00 e8 5e 7a 25 00 49 8b 1e 48 89 c5 4c 39 f3 74 58 <8b> 43
38 8b 53 40 89 c1 2b 4b 3c 39 ca 72 41 21 d0 49 8b 7d 00 49
RSP: 0018:ffffaae2000b3d88 EFLAGS: 00010017
RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000019
RDX: 0000000000000001 RSI: 006e801b1f26ce6a RDI: ffff9e39797c37b4
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000001 R12: ffff9e39797c37b4
R13: ffffaae2000b3db8 R14: ffff9e39797c37b8 R15: ffff9e39797c33d8
FS:  0000000000000000(0000) GS:ffff9e397b680000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000038 CR3: 0000000035844000 CR4: 00000000000006e0
Call Trace:
ir_do_keydown+0x8e/0x2b0
rc_keydown+0x52/0xc0
ir_work+0xb8/0x130 [ir_kbd_i2c]
process_one_work+0x19d/0x340
worker_thread+0x50/0x3b0
kthread+0xfb/0x130
? process_one_work+0x340/0x340
? kthread_park+0x80/0x80
ret_from_fork+0x35/0x40
Modules linked in: rc_hauppauge tuner msp3400 saa7127 saa7115 ivtv(+)
tveeprom cx2341x v4l2_common videodev mc i2c_algo_bit ir_kbd_i2c
ip_tables firewire_ohci e1000e serio_raw firewire_core ata_generic
crc_itu_t pata_acpi pata_jmicron fuse
CR2: 0000000000000038
---[ end trace c67c2697a99fa74b ]---
RIP: 0010:ir_lirc_scancode_event+0x3d/0xb0
Code: a6 b4 07 00 00 49 81 c6 b8 07 00 00 55 53 e8 ba a7 9d ff 4c 89
e7 49 89 45 00 e8 5e 7a 25 00 49 8b 1e 48 89 c5 4c 39 f3 74 58 <8b> 43
38 8b 53 40 89 c1 2b 4b 3c 39 ca 72 41 21 d0 49 8b 7d 00 49
RSP: 0018:ffffaae2000b3d88 EFLAGS: 00010017
RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000019
RDX: 0000000000000001 RSI: 006e801b1f26ce6a RDI: ffff9e39797c37b4
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000001 R12: ffff9e39797c37b4
R13: ffffaae2000b3db8 R14: ffff9e39797c37b8 R15: ffff9e39797c33d8
FS:  0000000000000000(0000) GS:ffff9e397b680000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000038 CR3: 0000000035844000 CR4: 00000000000006e0
rc rc0: lirc_dev: driver ir_kbd_i2c registered at minor = 0, scancode
receiver, no transmitter
tuner-simple 0-0061: creating new instance
tuner-simple 0-0061: type set to 2 (Philips NTSC (FI1236,FM1236 and
compatibles))
ivtv0: Registered device video0 for encoder MPG (4096 kB)
ivtv0: Registered device video32 for encoder YUV (2048 kB)
ivtv0: Registered device vbi0 for encoder VBI (1024 kB)
ivtv0: Registered device video24 for encoder PCM (320 kB)
ivtv0: Registered device radio0 for encoder radio
ivtv0: Registered device video16 for decoder MPG (1024 kB)
ivtv0: Registered device vbi8 for decoder VBI (64 kB)
ivtv0: Registered device vbi16 for decoder VOUT
ivtv0: Registered device video48 for decoder YUV (1024 kB)

Cc: stable@vger.kernel.org
Tested-by: Nick French <nickfrench@gmail.com>
Reported-by: Nick French <nickfrench@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/media/rc/rc-main.c |   27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1874,23 +1874,28 @@ int rc_register_device(struct rc_dev *de
 
 	dev->registered = true;
 
-	if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
-		rc = rc_setup_rx_device(dev);
-		if (rc)
-			goto out_dev;
-	}
-
-	/* Ensure that the lirc kfifo is setup before we start the thread */
+	/*
+	 * once the the input device is registered in rc_setup_rx_device,
+	 * userspace can open the input device and rc_open() will be called
+	 * as a result. This results in driver code being allowed to submit
+	 * keycodes with rc_keydown, so lirc must be registered first.
+	 */
 	if (dev->allowed_protocols != RC_PROTO_BIT_CEC) {
 		rc = ir_lirc_register(dev);
 		if (rc < 0)
-			goto out_rx;
+			goto out_dev;
+	}
+
+	if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
+		rc = rc_setup_rx_device(dev);
+		if (rc)
+			goto out_lirc;
 	}
 
 	if (dev->driver_type == RC_DRIVER_IR_RAW) {
 		rc = ir_raw_event_register(dev);
 		if (rc < 0)
-			goto out_lirc;
+			goto out_rx;
 	}
 
 	dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor,
@@ -1898,11 +1903,11 @@ int rc_register_device(struct rc_dev *de
 
 	return 0;
 
+out_rx:
+	rc_free_rx_device(dev);
 out_lirc:
 	if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
 		ir_lirc_unregister(dev);
-out_rx:
-	rc_free_rx_device(dev);
 out_dev:
 	device_del(&dev->dev);
 out_rx_free:



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 117/195] tools/kvm_stat: Fix kvm_exit filter name
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (115 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 116/195] media: rc: ensure lirc is initialized before registering input device Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 118/195] xen/balloon: Support xend-based toolstack take two Greg Kroah-Hartman
                   ` (81 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Andrew Jones, Gavin Shan, Paolo Bonzini

From: Gavin Shan <gshan@redhat.com>

commit 5fcf3a55a62afb0760ccb6f391d62f20bce4a42f upstream.

The filter name is fixed to "exit_reason" for some kvm_exit events, no
matter what architect we have. Actually, the filter name ("exit_reason")
is only applicable to x86, meaning it's broken on other architects
including aarch64.

This fixes the issue by providing various kvm_exit filter names, depending
on architect we're on. Afterwards, the variable filter name is picked and
applied through ioctl(fd, SET_FILTER).

Reported-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Gavin Shan <gshan@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 tools/kvm/kvm_stat/kvm_stat |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/tools/kvm/kvm_stat/kvm_stat
+++ b/tools/kvm/kvm_stat/kvm_stat
@@ -271,6 +271,7 @@ class ArchX86(Arch):
     def __init__(self, exit_reasons):
         self.sc_perf_evt_open = 298
         self.ioctl_numbers = IOCTL_NUMBERS
+        self.exit_reason_field = 'exit_reason'
         self.exit_reasons = exit_reasons
 
     def debugfs_is_child(self, field):
@@ -290,6 +291,7 @@ class ArchPPC(Arch):
         # numbers depend on the wordsize.
         char_ptr_size = ctypes.sizeof(ctypes.c_char_p)
         self.ioctl_numbers['SET_FILTER'] = 0x80002406 | char_ptr_size << 16
+        self.exit_reason_field = 'exit_nr'
         self.exit_reasons = {}
 
     def debugfs_is_child(self, field):
@@ -301,6 +303,7 @@ class ArchA64(Arch):
     def __init__(self):
         self.sc_perf_evt_open = 241
         self.ioctl_numbers = IOCTL_NUMBERS
+        self.exit_reason_field = 'esr_ec'
         self.exit_reasons = AARCH64_EXIT_REASONS
 
     def debugfs_is_child(self, field):
@@ -312,6 +315,7 @@ class ArchS390(Arch):
     def __init__(self):
         self.sc_perf_evt_open = 331
         self.ioctl_numbers = IOCTL_NUMBERS
+        self.exit_reason_field = None
         self.exit_reasons = None
 
     def debugfs_is_child(self, field):
@@ -542,8 +546,8 @@ class TracepointProvider(Provider):
         """
         filters = {}
         filters['kvm_userspace_exit'] = ('reason', USERSPACE_EXIT_REASONS)
-        if ARCH.exit_reasons:
-            filters['kvm_exit'] = ('exit_reason', ARCH.exit_reasons)
+        if ARCH.exit_reason_field and ARCH.exit_reasons:
+            filters['kvm_exit'] = (ARCH.exit_reason_field, ARCH.exit_reasons)
         return filters
 
     def _get_available_fields(self):



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 118/195] xen/balloon: Support xend-based toolstack take two
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (116 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 117/195] tools/kvm_stat: Fix kvm_exit filter name Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 119/195] watchdog: fix UAF in reboot notifier handling in watchdog core code Greg Kroah-Hartman
                   ` (80 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Juergen Gross, Boris Ostrovsky

From: Juergen Gross <jgross@suse.com>

commit eda4eabf86fd6806eaabc23fb90dd056fdac037b upstream.

Commit 3aa6c19d2f38be ("xen/balloon: Support xend-based toolstack")
tried to fix a regression with running on rather ancient Xen versions.
Unfortunately the fix was based on the assumption that xend would
just use another Xenstore node, but in reality only some downstream
versions of xend are doing that. The upstream xend does not write
that Xenstore node at all, so the problem must be fixed in another
way.

The easiest way to achieve that is to fall back to the behavior
before commit 96edd61dcf4436 ("xen/balloon: don't online new memory
initially") in case the static memory maximum can't be read.

This is achieved by setting static_max to the current number of
memory pages known by the system resulting in target_diff becoming
zero.

Fixes: 3aa6c19d2f38be ("xen/balloon: Support xend-based toolstack")
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: <stable@vger.kernel.org> # 4.13
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/xen/xen-balloon.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/xen/xen-balloon.c
+++ b/drivers/xen/xen-balloon.c
@@ -83,7 +83,7 @@ static void watch_target(struct xenbus_w
 				  "%llu", &static_max) == 1))
 			static_max >>= PAGE_SHIFT - 10;
 		else
-			static_max = new_target;
+			static_max = balloon_stats.current_pages;
 
 		target_diff = (xen_pv_domain() || xen_initial_domain()) ? 0
 				: static_max - balloon_stats.target_pages;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 119/195] watchdog: fix UAF in reboot notifier handling in watchdog core code
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (117 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 118/195] xen/balloon: Support xend-based toolstack take two Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 120/195] bcache: add readahead cache policy options via sysfs interface Greg Kroah-Hartman
                   ` (79 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Vladis Dronov, Guenter Roeck,
	Wim Van Sebroeck

From: Vladis Dronov <vdronov@redhat.com>

commit 69503e585192fdd84b240f18a0873d20e18a2e0a upstream.

After the commit 44ea39420fc9 ("drivers/watchdog: make use of
devm_register_reboot_notifier()") the struct notifier_block reboot_nb in
the struct watchdog_device is removed from the reboot notifiers chain at
the time watchdog's chardev is closed. But at least in i6300esb.c case
reboot_nb is embedded in the struct esb_dev which can be freed on its
device removal and before the chardev is closed, thus UAF at reboot:

[    7.728581] esb_probe: esb_dev.watchdog_device ffff91316f91ab28
ts# uname -r                            note the address ^^^
5.5.0-rc5-ae6088-wdog
ts# ./openwdog0 &
[1] 696
ts# opened /dev/watchdog0, sleeping 10s...
ts# echo 1 > /sys/devices/pci0000\:00/0000\:00\:09.0/remove
[  178.086079] devres:rel_nodes: dev ffff91317668a0b0 data ffff91316f91ab28
           esb_dev.watchdog_device.reboot_nb memory is freed here ^^^
ts# ...woken up
[  181.459010] devres:rel_nodes: dev ffff913171781000 data ffff913174a1dae8
[  181.460195] devm_unreg_reboot_notifier: res ffff913174a1dae8 nb ffff91316f91ab78
                                     attempt to use memory already freed ^^^
[  181.461063] devm_unreg_reboot_notifier: nb->call 6b6b6b6b6b6b6b6b
[  181.461243] devm_unreg_reboot_notifier: nb->next 6b6b6b6b6b6b6b6b
                freed memory is filled with a slub poison ^^^
[1]+  Done                    ./openwdog0
ts# reboot
[  229.921862] systemd-shutdown[1]: Rebooting.
[  229.939265] notifier_call_chain: nb ffffffff9c6c2f20 nb->next ffffffff9c6d50c0
[  229.943080] notifier_call_chain: nb ffffffff9c6d50c0 nb->next 6b6b6b6b6b6b6b6b
[  229.946054] notifier_call_chain: nb 6b6b6b6b6b6b6b6b INVAL
[  229.957584] general protection fault: 0000 [#1] SMP
[  229.958770] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.5.0-rc5-ae6088-wdog
[  229.960224] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), ...
[  229.963288] RIP: 0010:notifier_call_chain+0x66/0xd0
[  229.969082] RSP: 0018:ffffb20dc0013d88 EFLAGS: 00010246
[  229.970812] RAX: 000000000000002e RBX: 6b6b6b6b6b6b6b6b RCX: 00000000000008b3
[  229.972929] RDX: 0000000000000000 RSI: 0000000000000096 RDI: ffffffff9ccc46ac
[  229.975028] RBP: 0000000000000001 R08: 0000000000000000 R09: 00000000000008b3
[  229.977039] R10: 0000000000000001 R11: ffffffff9c26c740 R12: 0000000000000000
[  229.979155] R13: 6b6b6b6b6b6b6b6b R14: 0000000000000000 R15: 00000000fffffffa
...   slub_debug=FZP poison ^^^
[  229.989089] Call Trace:
[  229.990157]  blocking_notifier_call_chain+0x43/0x59
[  229.991401]  kernel_restart_prepare+0x14/0x30
[  229.992607]  kernel_restart+0x9/0x30
[  229.993800]  __do_sys_reboot+0x1d2/0x210
[  230.000149]  do_syscall_64+0x3d/0x130
[  230.001277]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  230.002639] RIP: 0033:0x7f5461bdd177
[  230.016402] Modules linked in: i6300esb
[  230.050261] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

Fix the crash by reverting 44ea39420fc9 so unregister_reboot_notifier()
is called when watchdog device is removed. This also makes handling of
the reboot notifier unified with the handling of the restart handler,
which is freed with unregister_restart_handler() in the same place.

Fixes: 44ea39420fc9 ("drivers/watchdog: make use of devm_register_reboot_notifier()")
Cc: stable@vger.kernel.org # v4.15+
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200108125347.6067-1-vdronov@redhat.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/watchdog/watchdog_core.c |   35 +++++++++++++++++++++++++++++++++++
 drivers/watchdog/watchdog_dev.c  |   36 +-----------------------------------
 2 files changed, 36 insertions(+), 35 deletions(-)

--- a/drivers/watchdog/watchdog_core.c
+++ b/drivers/watchdog/watchdog_core.c
@@ -138,6 +138,25 @@ int watchdog_init_timeout(struct watchdo
 }
 EXPORT_SYMBOL_GPL(watchdog_init_timeout);
 
+static int watchdog_reboot_notifier(struct notifier_block *nb,
+				    unsigned long code, void *data)
+{
+	struct watchdog_device *wdd;
+
+	wdd = container_of(nb, struct watchdog_device, reboot_nb);
+	if (code == SYS_DOWN || code == SYS_HALT) {
+		if (watchdog_active(wdd)) {
+			int ret;
+
+			ret = wdd->ops->stop(wdd);
+			if (ret)
+				return NOTIFY_BAD;
+		}
+	}
+
+	return NOTIFY_DONE;
+}
+
 static int watchdog_restart_notifier(struct notifier_block *nb,
 				     unsigned long action, void *data)
 {
@@ -226,6 +245,19 @@ static int __watchdog_register_device(st
 		}
 	}
 
+	if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status)) {
+		wdd->reboot_nb.notifier_call = watchdog_reboot_notifier;
+
+		ret = register_reboot_notifier(&wdd->reboot_nb);
+		if (ret) {
+			pr_err("watchdog%d: Cannot register reboot notifier (%d)\n",
+			       wdd->id, ret);
+			watchdog_dev_unregister(wdd);
+			ida_simple_remove(&watchdog_ida, id);
+			return ret;
+		}
+	}
+
 	if (wdd->ops->restart) {
 		wdd->restart_nb.notifier_call = watchdog_restart_notifier;
 
@@ -271,6 +303,9 @@ static void __watchdog_unregister_device
 	if (wdd->ops->restart)
 		unregister_restart_handler(&wdd->restart_nb);
 
+	if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status))
+		unregister_reboot_notifier(&wdd->reboot_nb);
+
 	watchdog_dev_unregister(wdd);
 	ida_simple_remove(&watchdog_ida, wdd->id);
 }
--- a/drivers/watchdog/watchdog_dev.c
+++ b/drivers/watchdog/watchdog_dev.c
@@ -42,7 +42,6 @@
 #include <linux/miscdevice.h>	/* For handling misc devices */
 #include <linux/module.h>	/* For module stuff/... */
 #include <linux/mutex.h>	/* For mutexes */
-#include <linux/reboot.h>	/* For reboot notifier */
 #include <linux/slab.h>		/* For memory functions */
 #include <linux/types.h>	/* For standard types (like size_t) */
 #include <linux/watchdog.h>	/* For watchdog specific items */
@@ -1048,25 +1047,6 @@ static void watchdog_cdev_unregister(str
 	put_device(&wd_data->dev);
 }
 
-static int watchdog_reboot_notifier(struct notifier_block *nb,
-				    unsigned long code, void *data)
-{
-	struct watchdog_device *wdd;
-
-	wdd = container_of(nb, struct watchdog_device, reboot_nb);
-	if (code == SYS_DOWN || code == SYS_HALT) {
-		if (watchdog_active(wdd)) {
-			int ret;
-
-			ret = wdd->ops->stop(wdd);
-			if (ret)
-				return NOTIFY_BAD;
-		}
-	}
-
-	return NOTIFY_DONE;
-}
-
 /*
  *	watchdog_dev_register: register a watchdog device
  *	@wdd: watchdog device
@@ -1085,22 +1065,8 @@ int watchdog_dev_register(struct watchdo
 		return ret;
 
 	ret = watchdog_register_pretimeout(wdd);
-	if (ret) {
+	if (ret)
 		watchdog_cdev_unregister(wdd);
-		return ret;
-	}
-
-	if (test_bit(WDOG_STOP_ON_REBOOT, &wdd->status)) {
-		wdd->reboot_nb.notifier_call = watchdog_reboot_notifier;
-
-		ret = devm_register_reboot_notifier(&wdd->wd_data->dev,
-						    &wdd->reboot_nb);
-		if (ret) {
-			pr_err("watchdog%d: Cannot register reboot notifier (%d)\n",
-			       wdd->id, ret);
-			watchdog_dev_unregister(wdd);
-		}
-	}
 
 	return ret;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 120/195] bcache: add readahead cache policy options via sysfs interface
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (118 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 119/195] watchdog: fix UAF in reboot notifier handling in watchdog core code Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:32 ` [PATCH 4.19 121/195] eventfd: track eventfd_signal() recursion depth Greg Kroah-Hartman
                   ` (78 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Coly Li, Eric Wheeler, Michael Lyle,
	Jens Axboe

From: Coly Li <colyli@suse.de>

commit 038ba8cc1bffc51250add4a9b9249d4331576d8f upstream.

In year 2007 high performance SSD was still expensive, in order to
save more space for real workload or meta data, the readahead I/Os
for non-meta data was bypassed and not cached on SSD.

In now days, SSD price drops a lot and people can find larger size
SSD with more comfortable price. It is unncessary to alway bypass
normal readahead I/Os to save SSD space for now.

This patch adds options for readahead data cache policies via sysfs
file /sys/block/bcache<N>/readahead_cache_policy, the options are,
- "all": cache all readahead data I/Os.
- "meta-only": only cache meta data, and bypass other regular I/Os.

If users want to make bcache continue to only cache readahead request
for metadata and bypass regular data readahead, please set "meta-only"
to this sysfs file. By default, bcache will back to cache all read-
ahead requests now.

Cc: stable@vger.kernel.org
Signed-off-by: Coly Li <colyli@suse.de>
Acked-by: Eric Wheeler <bcache@linux.ewheeler.net>
Cc: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/bcache/bcache.h  |    3 +++
 drivers/md/bcache/request.c |   17 ++++++++++++-----
 drivers/md/bcache/sysfs.c   |   22 ++++++++++++++++++++++
 3 files changed, 37 insertions(+), 5 deletions(-)

--- a/drivers/md/bcache/bcache.h
+++ b/drivers/md/bcache/bcache.h
@@ -329,6 +329,9 @@ struct cached_dev {
 	 */
 	atomic_t		has_dirty;
 
+#define BCH_CACHE_READA_ALL		0
+#define BCH_CACHE_READA_META_ONLY	1
+	unsigned int		cache_readahead_policy;
 	struct bch_ratelimit	writeback_rate;
 	struct delayed_work	writeback_rate_update;
 
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -391,13 +391,20 @@ static bool check_should_bypass(struct c
 		goto skip;
 
 	/*
-	 * Flag for bypass if the IO is for read-ahead or background,
-	 * unless the read-ahead request is for metadata
+	 * If the bio is for read-ahead or background IO, bypass it or
+	 * not depends on the following situations,
+	 * - If the IO is for meta data, always cache it and no bypass
+	 * - If the IO is not meta data, check dc->cache_reada_policy,
+	 *      BCH_CACHE_READA_ALL: cache it and not bypass
+	 *      BCH_CACHE_READA_META_ONLY: not cache it and bypass
+	 * That is, read-ahead request for metadata always get cached
 	 * (eg, for gfs2 or xfs).
 	 */
-	if (bio->bi_opf & (REQ_RAHEAD|REQ_BACKGROUND) &&
-	    !(bio->bi_opf & (REQ_META|REQ_PRIO)))
-		goto skip;
+	if ((bio->bi_opf & (REQ_RAHEAD|REQ_BACKGROUND))) {
+		if (!(bio->bi_opf & (REQ_META|REQ_PRIO)) &&
+		    (dc->cache_readahead_policy != BCH_CACHE_READA_ALL))
+			goto skip;
+	}
 
 	if (bio->bi_iter.bi_sector & (c->sb.block_size - 1) ||
 	    bio_sectors(bio) & (c->sb.block_size - 1)) {
--- a/drivers/md/bcache/sysfs.c
+++ b/drivers/md/bcache/sysfs.c
@@ -25,6 +25,12 @@ static const char * const bch_cache_mode
 	NULL
 };
 
+static const char * const bch_reada_cache_policies[] = {
+	"all",
+	"meta-only",
+	NULL
+};
+
 /* Default is -1; we skip past it for stop_when_cache_set_failed */
 static const char * const bch_stop_on_failure_modes[] = {
 	"auto",
@@ -94,6 +100,7 @@ rw_attribute(congested_write_threshold_u
 rw_attribute(sequential_cutoff);
 rw_attribute(data_csum);
 rw_attribute(cache_mode);
+rw_attribute(readahead_cache_policy);
 rw_attribute(stop_when_cache_set_failed);
 rw_attribute(writeback_metadata);
 rw_attribute(writeback_running);
@@ -160,6 +167,11 @@ SHOW(__bch_cached_dev)
 					       bch_cache_modes,
 					       BDEV_CACHE_MODE(&dc->sb));
 
+	if (attr == &sysfs_readahead_cache_policy)
+		return bch_snprint_string_list(buf, PAGE_SIZE,
+					      bch_reada_cache_policies,
+					      dc->cache_readahead_policy);
+
 	if (attr == &sysfs_stop_when_cache_set_failed)
 		return bch_snprint_string_list(buf, PAGE_SIZE,
 					       bch_stop_on_failure_modes,
@@ -324,6 +336,15 @@ STORE(__cached_dev)
 		}
 	}
 
+	if (attr == &sysfs_readahead_cache_policy) {
+		v = __sysfs_match_string(bch_reada_cache_policies, -1, buf);
+		if (v < 0)
+			return v;
+
+		if ((unsigned int) v != dc->cache_readahead_policy)
+			dc->cache_readahead_policy = v;
+	}
+
 	if (attr == &sysfs_stop_when_cache_set_failed) {
 		v = __sysfs_match_string(bch_stop_on_failure_modes, -1, buf);
 		if (v < 0)
@@ -417,6 +438,7 @@ static struct attribute *bch_cached_dev_
 	&sysfs_data_csum,
 #endif
 	&sysfs_cache_mode,
+	&sysfs_readahead_cache_policy,
 	&sysfs_stop_when_cache_set_failed,
 	&sysfs_writeback_metadata,
 	&sysfs_writeback_running,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 121/195] eventfd: track eventfd_signal() recursion depth
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (119 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 120/195] bcache: add readahead cache policy options via sysfs interface Greg Kroah-Hartman
@ 2020-02-10 12:32 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 122/195] aio: prevent potential eventfd recursion on poll Greg Kroah-Hartman
                   ` (77 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Jens Axboe

From: Jens Axboe <axboe@kernel.dk>

commit b5e683d5cab8cd433b06ae178621f083cabd4f63 upstream.

eventfd use cases from aio and io_uring can deadlock due to circular
or resursive calling, when eventfd_signal() tries to grab the waitqueue
lock. On top of that, it's also possible to construct notification
chains that are deep enough that we could blow the stack.

Add a percpu counter that tracks the percpu recursion depth, warn if we
exceed it. The counter is also exposed so that users of eventfd_signal()
can do the right thing if it's non-zero in the context where it is
called.

Cc: stable@vger.kernel.org # 4.19+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/eventfd.c            |   15 +++++++++++++++
 include/linux/eventfd.h |   14 ++++++++++++++
 2 files changed, 29 insertions(+)

--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -22,6 +22,8 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 
+DEFINE_PER_CPU(int, eventfd_wake_count);
+
 struct eventfd_ctx {
 	struct kref kref;
 	wait_queue_head_t wqh;
@@ -55,12 +57,25 @@ __u64 eventfd_signal(struct eventfd_ctx
 {
 	unsigned long flags;
 
+	/*
+	 * Deadlock or stack overflow issues can happen if we recurse here
+	 * through waitqueue wakeup handlers. If the caller users potentially
+	 * nested waitqueues with custom wakeup handlers, then it should
+	 * check eventfd_signal_count() before calling this function. If
+	 * it returns true, the eventfd_signal() call should be deferred to a
+	 * safe context.
+	 */
+	if (WARN_ON_ONCE(this_cpu_read(eventfd_wake_count)))
+		return 0;
+
 	spin_lock_irqsave(&ctx->wqh.lock, flags);
+	this_cpu_inc(eventfd_wake_count);
 	if (ULLONG_MAX - ctx->count < n)
 		n = ULLONG_MAX - ctx->count;
 	ctx->count += n;
 	if (waitqueue_active(&ctx->wqh))
 		wake_up_locked_poll(&ctx->wqh, EPOLLIN);
+	this_cpu_dec(eventfd_wake_count);
 	spin_unlock_irqrestore(&ctx->wqh.lock, flags);
 
 	return n;
--- a/include/linux/eventfd.h
+++ b/include/linux/eventfd.h
@@ -12,6 +12,8 @@
 #include <linux/fcntl.h>
 #include <linux/wait.h>
 #include <linux/err.h>
+#include <linux/percpu-defs.h>
+#include <linux/percpu.h>
 
 /*
  * CAREFUL: Check include/uapi/asm-generic/fcntl.h when defining
@@ -40,6 +42,13 @@ __u64 eventfd_signal(struct eventfd_ctx
 int eventfd_ctx_remove_wait_queue(struct eventfd_ctx *ctx, wait_queue_entry_t *wait,
 				  __u64 *cnt);
 
+DECLARE_PER_CPU(int, eventfd_wake_count);
+
+static inline bool eventfd_signal_count(void)
+{
+	return this_cpu_read(eventfd_wake_count);
+}
+
 #else /* CONFIG_EVENTFD */
 
 /*
@@ -68,6 +77,11 @@ static inline int eventfd_ctx_remove_wai
 	return -ENOSYS;
 }
 
+static inline bool eventfd_signal_count(void)
+{
+	return false;
+}
+
 #endif
 
 #endif /* _LINUX_EVENTFD_H */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 122/195] aio: prevent potential eventfd recursion on poll
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (120 preceding siblings ...)
  2020-02-10 12:32 ` [PATCH 4.19 121/195] eventfd: track eventfd_signal() recursion depth Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 123/195] KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks Greg Kroah-Hartman
                   ` (76 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Jeff Moyer, Jens Axboe

From: Jens Axboe <axboe@kernel.dk>

commit 01d7a356872eec22ef34a33a5f9cfa917d145468 upstream.

If we have nested or circular eventfd wakeups, then we can deadlock if
we run them inline from our poll waitqueue wakeup handler. It's also
possible to have very long chains of notifications, to the extent where
we could risk blowing the stack.

Check the eventfd recursion count before calling eventfd_signal(). If
it's non-zero, then punt the signaling to async context. This is always
safe, as it takes us out-of-line in terms of stack and locking context.

Cc: stable@vger.kernel.org # 4.19+
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/aio.c |   20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1600,6 +1600,14 @@ static int aio_fsync(struct fsync_iocb *
 	return 0;
 }
 
+static void aio_poll_put_work(struct work_struct *work)
+{
+	struct poll_iocb *req = container_of(work, struct poll_iocb, work);
+	struct aio_kiocb *iocb = container_of(req, struct aio_kiocb, poll);
+
+	iocb_put(iocb);
+}
+
 static void aio_poll_complete_work(struct work_struct *work)
 {
 	struct poll_iocb *req = container_of(work, struct poll_iocb, work);
@@ -1664,6 +1672,8 @@ static int aio_poll_wake(struct wait_que
 	list_del_init(&req->wait.entry);
 
 	if (mask && spin_trylock_irqsave(&iocb->ki_ctx->ctx_lock, flags)) {
+		struct kioctx *ctx = iocb->ki_ctx;
+
 		/*
 		 * Try to complete the iocb inline if we can. Use
 		 * irqsave/irqrestore because not all filesystems (e.g. fuse)
@@ -1673,8 +1683,14 @@ static int aio_poll_wake(struct wait_que
 		list_del(&iocb->ki_list);
 		iocb->ki_res.res = mangle_poll(mask);
 		req->done = true;
-		spin_unlock_irqrestore(&iocb->ki_ctx->ctx_lock, flags);
-		iocb_put(iocb);
+		if (iocb->ki_eventfd && eventfd_signal_count()) {
+			iocb = NULL;
+			INIT_WORK(&req->work, aio_poll_put_work);
+			schedule_work(&req->work);
+		}
+		spin_unlock_irqrestore(&ctx->ctx_lock, flags);
+		if (iocb)
+			iocb_put(iocb);
 	} else {
 		schedule_work(&req->work);
 	}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 123/195] KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (121 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 122/195] aio: prevent potential eventfd recursion on poll Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 124/195] KVM: x86: Refactor prefix decoding " Greg Kroah-Hartman
                   ` (75 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 14e32321f3606e4b0970200b6e5e47ee6f1e6410 upstream.

This fixes a Spectre-v1/L1TF vulnerability in picdev_write().
It replaces index computations based on the (attacked-controlled) port
number with constants through a minor refactoring.

Fixes: 85f455f7ddbe ("KVM: Add support for in-kernel PIC emulation")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/i8259.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -460,10 +460,14 @@ static int picdev_write(struct kvm_pic *
 	switch (addr) {
 	case 0x20:
 	case 0x21:
+		pic_lock(s);
+		pic_ioport_write(&s->pics[0], addr, data);
+		pic_unlock(s);
+		break;
 	case 0xa0:
 	case 0xa1:
 		pic_lock(s);
-		pic_ioport_write(&s->pics[addr >> 7], addr, data);
+		pic_ioport_write(&s->pics[1], addr, data);
 		pic_unlock(s);
 		break;
 	case 0x4d0:



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 124/195] KVM: x86: Refactor prefix decoding to prevent Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (122 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 123/195] KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 125/195] KVM: x86: Protect pmu_intel.c from " Greg Kroah-Hartman
                   ` (74 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 125ffc5e0a56a3eded608dc51e09d5ebf72cf652 upstream.

This fixes Spectre-v1/L1TF vulnerabilities in
vmx_read_guest_seg_selector(), vmx_read_guest_seg_base(),
vmx_read_guest_seg_limit() and vmx_read_guest_seg_ar().  When
invoked from emulation, these functions contain index computations
based on the (attacker-influenced) segment value.  Using constants
prevents the attack.

Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/emulate.c |   16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -5164,16 +5164,28 @@ int x86_decode_insn(struct x86_emulate_c
 				ctxt->ad_bytes = def_ad_bytes ^ 6;
 			break;
 		case 0x26:	/* ES override */
+			has_seg_override = true;
+			ctxt->seg_override = VCPU_SREG_ES;
+			break;
 		case 0x2e:	/* CS override */
+			has_seg_override = true;
+			ctxt->seg_override = VCPU_SREG_CS;
+			break;
 		case 0x36:	/* SS override */
+			has_seg_override = true;
+			ctxt->seg_override = VCPU_SREG_SS;
+			break;
 		case 0x3e:	/* DS override */
 			has_seg_override = true;
-			ctxt->seg_override = (ctxt->b >> 3) & 3;
+			ctxt->seg_override = VCPU_SREG_DS;
 			break;
 		case 0x64:	/* FS override */
+			has_seg_override = true;
+			ctxt->seg_override = VCPU_SREG_FS;
+			break;
 		case 0x65:	/* GS override */
 			has_seg_override = true;
-			ctxt->seg_override = ctxt->b & 7;
+			ctxt->seg_override = VCPU_SREG_GS;
 			break;
 		case 0x40 ... 0x4f: /* REX */
 			if (mode != X86EMUL_MODE_PROT64)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 125/195] KVM: x86: Protect pmu_intel.c from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (123 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 124/195] KVM: x86: Refactor prefix decoding " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 126/195] KVM: x86: Protect DR-based index computations " Greg Kroah-Hartman
                   ` (73 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 66061740f1a487f4ed54fde75e724709f805da53 upstream.

This fixes Spectre-v1/L1TF vulnerabilities in intel_find_fixed_event()
and intel_rdpmc_ecx_to_pmc().
kvm_rdpmc() (ancestor of intel_find_fixed_event()) and
reprogram_fixed_counter() (ancestor of intel_rdpmc_ecx_to_pmc()) are
exported symbols so KVM should treat them conservatively from a security
perspective.

Fixes: 25462f7f5295 ("KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/pmu_intel.c |   24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

--- a/arch/x86/kvm/pmu_intel.c
+++ b/arch/x86/kvm/pmu_intel.c
@@ -87,10 +87,14 @@ static unsigned intel_find_arch_event(st
 
 static unsigned intel_find_fixed_event(int idx)
 {
-	if (idx >= ARRAY_SIZE(fixed_pmc_events))
+	u32 event;
+	size_t size = ARRAY_SIZE(fixed_pmc_events);
+
+	if (idx >= size)
 		return PERF_COUNT_HW_MAX;
 
-	return intel_arch_events[fixed_pmc_events[idx]].event_type;
+	event = fixed_pmc_events[array_index_nospec(idx, size)];
+	return intel_arch_events[event].event_type;
 }
 
 /* check if a PMC is enabled by comparing it with globl_ctrl bits. */
@@ -131,16 +135,20 @@ static struct kvm_pmc *intel_msr_idx_to_
 	struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
 	bool fixed = idx & (1u << 30);
 	struct kvm_pmc *counters;
+	unsigned int num_counters;
 
 	idx &= ~(3u << 30);
-	if (!fixed && idx >= pmu->nr_arch_gp_counters)
-		return NULL;
-	if (fixed && idx >= pmu->nr_arch_fixed_counters)
+	if (fixed) {
+		counters = pmu->fixed_counters;
+		num_counters = pmu->nr_arch_fixed_counters;
+	} else {
+		counters = pmu->gp_counters;
+		num_counters = pmu->nr_arch_gp_counters;
+	}
+	if (idx >= num_counters)
 		return NULL;
-	counters = fixed ? pmu->fixed_counters : pmu->gp_counters;
 	*mask &= pmu->counter_bitmask[fixed ? KVM_PMC_FIXED : KVM_PMC_GP];
-
-	return &counters[idx];
+	return &counters[array_index_nospec(idx, num_counters)];
 }
 
 static bool intel_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 126/195] KVM: x86: Protect DR-based index computations from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (124 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 125/195] KVM: x86: Protect pmu_intel.c from " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 127/195] KVM: x86: Protect kvm_lapic_reg_write() " Greg Kroah-Hartman
                   ` (72 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit ea740059ecb37807ba47b84b33d1447435a8d868 upstream.

This fixes a Spectre-v1/L1TF vulnerability in __kvm_set_dr() and
kvm_get_dr().
Both kvm_get_dr() and kvm_set_dr() (a wrapper of __kvm_set_dr()) are
exported symbols so KVM should tream them conservatively from a security
perspective.

Fixes: 020df0794f57 ("KVM: move DR register access handling into generic code")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/x86.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -961,9 +961,11 @@ static u64 kvm_dr6_fixed(struct kvm_vcpu
 
 static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
 {
+	size_t size = ARRAY_SIZE(vcpu->arch.db);
+
 	switch (dr) {
 	case 0 ... 3:
-		vcpu->arch.db[dr] = val;
+		vcpu->arch.db[array_index_nospec(dr, size)] = val;
 		if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
 			vcpu->arch.eff_db[dr] = val;
 		break;
@@ -1000,9 +1002,11 @@ EXPORT_SYMBOL_GPL(kvm_set_dr);
 
 int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
 {
+	size_t size = ARRAY_SIZE(vcpu->arch.db);
+
 	switch (dr) {
 	case 0 ... 3:
-		*val = vcpu->arch.db[dr];
+		*val = vcpu->arch.db[array_index_nospec(dr, size)];
 		break;
 	case 4:
 		/* fall through */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 127/195] KVM: x86: Protect kvm_lapic_reg_write() from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (125 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 126/195] KVM: x86: Protect DR-based index computations " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 128/195] KVM: x86: Protect kvm_hv_msr_[get|set]_crash_data() " Greg Kroah-Hartman
                   ` (71 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 4bf79cb089f6b1c6c632492c0271054ce52ad766 upstream.

This fixes a Spectre-v1/L1TF vulnerability in kvm_lapic_reg_write().
This function contains index computations based on the
(attacker-controlled) MSR number.

Fixes: 0105d1a52640 ("KVM: x2apic interface to lapic")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/lapic.c |   13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1862,15 +1862,20 @@ int kvm_lapic_reg_write(struct kvm_lapic
 	case APIC_LVTTHMR:
 	case APIC_LVTPC:
 	case APIC_LVT1:
-	case APIC_LVTERR:
+	case APIC_LVTERR: {
 		/* TODO: Check vector */
+		size_t size;
+		u32 index;
+
 		if (!kvm_apic_sw_enabled(apic))
 			val |= APIC_LVT_MASKED;
-
-		val &= apic_lvt_mask[(reg - APIC_LVTT) >> 4];
+		size = ARRAY_SIZE(apic_lvt_mask);
+		index = array_index_nospec(
+				(reg - APIC_LVTT) >> 4, size);
+		val &= apic_lvt_mask[index];
 		kvm_lapic_set_reg(apic, reg, val);
-
 		break;
+	}
 
 	case APIC_LVTT:
 		if (!kvm_apic_sw_enabled(apic))



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 128/195] KVM: x86: Protect kvm_hv_msr_[get|set]_crash_data() from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (126 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 127/195] KVM: x86: Protect kvm_lapic_reg_write() " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 129/195] KVM: x86: Protect ioapic_write_indirect() " Greg Kroah-Hartman
                   ` (70 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 8618793750071d66028584a83ed0b4fa7eb4f607 upstream.

This fixes Spectre-v1/L1TF vulnerabilities in kvm_hv_msr_get_crash_data()
and kvm_hv_msr_set_crash_data().
These functions contain index computations that use the
(attacker-controlled) MSR number.

Fixes: e7d9513b60e8 ("kvm/x86: added hyper-v crash msrs into kvm hyperv context")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/hyperv.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -792,11 +792,12 @@ static int kvm_hv_msr_get_crash_data(str
 				     u32 index, u64 *pdata)
 {
 	struct kvm_hv *hv = &vcpu->kvm->arch.hyperv;
+	size_t size = ARRAY_SIZE(hv->hv_crash_param);
 
-	if (WARN_ON_ONCE(index >= ARRAY_SIZE(hv->hv_crash_param)))
+	if (WARN_ON_ONCE(index >= size))
 		return -EINVAL;
 
-	*pdata = hv->hv_crash_param[index];
+	*pdata = hv->hv_crash_param[array_index_nospec(index, size)];
 	return 0;
 }
 
@@ -835,11 +836,12 @@ static int kvm_hv_msr_set_crash_data(str
 				     u32 index, u64 data)
 {
 	struct kvm_hv *hv = &vcpu->kvm->arch.hyperv;
+	size_t size = ARRAY_SIZE(hv->hv_crash_param);
 
-	if (WARN_ON_ONCE(index >= ARRAY_SIZE(hv->hv_crash_param)))
+	if (WARN_ON_ONCE(index >= size))
 		return -EINVAL;
 
-	hv->hv_crash_param[index] = data;
+	hv->hv_crash_param[array_index_nospec(index, size)] = data;
 	return 0;
 }
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 129/195] KVM: x86: Protect ioapic_write_indirect() from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (127 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 128/195] KVM: x86: Protect kvm_hv_msr_[get|set]_crash_data() " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 130/195] KVM: x86: Protect MSR-based index computations in pmu.h " Greg Kroah-Hartman
                   ` (69 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 670564559ca35b439c8d8861fc399451ddf95137 upstream.

This fixes a Spectre-v1/L1TF vulnerability in ioapic_write_indirect().
This function contains index computations based on the
(attacker-controlled) IOREGSEL register.

This patch depends on patch
"KVM: x86: Protect ioapic_read_indirect() from Spectre-v1/L1TF attacks".

Fixes: 70f93dae32ac ("KVM: Use temporary variable to shorten lines.")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/ioapic.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/x86/kvm/ioapic.c
+++ b/arch/x86/kvm/ioapic.c
@@ -297,6 +297,7 @@ static void ioapic_write_indirect(struct
 		ioapic_debug("change redir index %x val %x\n", index, val);
 		if (index >= IOAPIC_NUM_PINS)
 			return;
+		index = array_index_nospec(index, IOAPIC_NUM_PINS);
 		e = &ioapic->redirtbl[index];
 		mask_before = e->fields.mask;
 		/* Preserve read-only fields */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 130/195] KVM: x86: Protect MSR-based index computations in pmu.h from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (128 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 129/195] KVM: x86: Protect ioapic_write_indirect() " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 131/195] KVM: x86: Protect ioapic_read_indirect() " Greg Kroah-Hartman
                   ` (68 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 13c5183a4e643cc2b03a22d0e582c8e17bb7457d upstream.

This fixes a Spectre-v1/L1TF vulnerability in the get_gp_pmc() and
get_fixed_pmc() functions.
They both contain index computations based on the (attacker-controlled)
MSR number.

Fixes: 25462f7f5295 ("KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/pmu.h |   18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -2,6 +2,8 @@
 #ifndef __KVM_X86_PMU_H
 #define __KVM_X86_PMU_H
 
+#include <linux/nospec.h>
+
 #define vcpu_to_pmu(vcpu) (&(vcpu)->arch.pmu)
 #define pmu_to_vcpu(pmu)  (container_of((pmu), struct kvm_vcpu, arch.pmu))
 #define pmc_to_pmu(pmc)   (&(pmc)->vcpu->arch.pmu)
@@ -86,8 +88,12 @@ static inline bool pmc_is_enabled(struct
 static inline struct kvm_pmc *get_gp_pmc(struct kvm_pmu *pmu, u32 msr,
 					 u32 base)
 {
-	if (msr >= base && msr < base + pmu->nr_arch_gp_counters)
-		return &pmu->gp_counters[msr - base];
+	if (msr >= base && msr < base + pmu->nr_arch_gp_counters) {
+		u32 index = array_index_nospec(msr - base,
+					       pmu->nr_arch_gp_counters);
+
+		return &pmu->gp_counters[index];
+	}
 
 	return NULL;
 }
@@ -97,8 +103,12 @@ static inline struct kvm_pmc *get_fixed_
 {
 	int base = MSR_CORE_PERF_FIXED_CTR0;
 
-	if (msr >= base && msr < base + pmu->nr_arch_fixed_counters)
-		return &pmu->fixed_counters[msr - base];
+	if (msr >= base && msr < base + pmu->nr_arch_fixed_counters) {
+		u32 index = array_index_nospec(msr - base,
+					       pmu->nr_arch_fixed_counters);
+
+		return &pmu->fixed_counters[index];
+	}
 
 	return NULL;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 131/195] KVM: x86: Protect ioapic_read_indirect() from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (129 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 130/195] KVM: x86: Protect MSR-based index computations in pmu.h " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 132/195] KVM: x86: Protect MSR-based index computations from Spectre-v1/L1TF attacks in x86.c Greg Kroah-Hartman
                   ` (67 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 8c86405f606ca8508b8d9280680166ca26723695 upstream.

This fixes a Spectre-v1/L1TF vulnerability in ioapic_read_indirect().
This function contains index computations based on the
(attacker-controlled) IOREGSEL register.

Fixes: a2c118bfab8b ("KVM: Fix bounds checking in ioapic indirect register reads (CVE-2013-1798)")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/ioapic.c |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

--- a/arch/x86/kvm/ioapic.c
+++ b/arch/x86/kvm/ioapic.c
@@ -36,6 +36,7 @@
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/export.h>
+#include <linux/nospec.h>
 #include <asm/processor.h>
 #include <asm/page.h>
 #include <asm/current.h>
@@ -73,13 +74,14 @@ static unsigned long ioapic_read_indirec
 	default:
 		{
 			u32 redir_index = (ioapic->ioregsel - 0x10) >> 1;
-			u64 redir_content;
+			u64 redir_content = ~0ULL;
 
-			if (redir_index < IOAPIC_NUM_PINS)
-				redir_content =
-					ioapic->redirtbl[redir_index].bits;
-			else
-				redir_content = ~0ULL;
+			if (redir_index < IOAPIC_NUM_PINS) {
+				u32 index = array_index_nospec(
+					redir_index, IOAPIC_NUM_PINS);
+
+				redir_content = ioapic->redirtbl[index].bits;
+			}
 
 			result = (ioapic->ioregsel & 0x1) ?
 			    (redir_content >> 32) & 0xffffffff :



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 132/195] KVM: x86: Protect MSR-based index computations from Spectre-v1/L1TF attacks in x86.c
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (130 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 131/195] KVM: x86: Protect ioapic_read_indirect() " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 133/195] KVM: x86: Protect x86_decode_insn from Spectre-v1/L1TF attacks Greg Kroah-Hartman
                   ` (66 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 6ec4c5eee1750d5d17951c4e1960d953376a0dda upstream.

This fixes a Spectre-v1/L1TF vulnerability in set_msr_mce() and
get_msr_mce().
Both functions contain index computations based on the
(attacker-controlled) MSR number.

Fixes: 890ca9aefa78 ("KVM: Add MCE support")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/x86.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2273,7 +2273,10 @@ static int set_msr_mce(struct kvm_vcpu *
 	default:
 		if (msr >= MSR_IA32_MC0_CTL &&
 		    msr < MSR_IA32_MCx_CTL(bank_num)) {
-			u32 offset = msr - MSR_IA32_MC0_CTL;
+			u32 offset = array_index_nospec(
+				msr - MSR_IA32_MC0_CTL,
+				MSR_IA32_MCx_CTL(bank_num) - MSR_IA32_MC0_CTL);
+
 			/* only 0 or all 1s can be written to IA32_MCi_CTL
 			 * some Linux kernels though clear bit 10 in bank 4 to
 			 * workaround a BIOS/GART TBL issue on AMD K8s, ignore
@@ -2685,7 +2688,10 @@ static int get_msr_mce(struct kvm_vcpu *
 	default:
 		if (msr >= MSR_IA32_MC0_CTL &&
 		    msr < MSR_IA32_MCx_CTL(bank_num)) {
-			u32 offset = msr - MSR_IA32_MC0_CTL;
+			u32 offset = array_index_nospec(
+				msr - MSR_IA32_MC0_CTL,
+				MSR_IA32_MCx_CTL(bank_num) - MSR_IA32_MC0_CTL);
+
 			data = vcpu->arch.mce_banks[offset];
 			break;
 		}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 133/195] KVM: x86: Protect x86_decode_insn from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (131 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 132/195] KVM: x86: Protect MSR-based index computations from Spectre-v1/L1TF attacks in x86.c Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 134/195] KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() " Greg Kroah-Hartman
                   ` (65 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 3c9053a2cae7ba2ba73766a34cea41baa70f57f7 upstream.

This fixes a Spectre-v1/L1TF vulnerability in x86_decode_insn().
kvm_emulate_instruction() (an ancestor of x86_decode_insn()) is an exported
symbol, so KVM should treat it conservatively from a security perspective.

Fixes: 045a282ca415 ("KVM: emulator: implement fninit, fnstsw, fnstcw")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/emulate.c |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -5269,10 +5269,15 @@ done_prefixes:
 			}
 			break;
 		case Escape:
-			if (ctxt->modrm > 0xbf)
-				opcode = opcode.u.esc->high[ctxt->modrm - 0xc0];
-			else
+			if (ctxt->modrm > 0xbf) {
+				size_t size = ARRAY_SIZE(opcode.u.esc->high);
+				u32 index = array_index_nospec(
+					ctxt->modrm - 0xc0, size);
+
+				opcode = opcode.u.esc->high[index];
+			} else {
 				opcode = opcode.u.esc->op[(ctxt->modrm >> 3) & 7];
+			}
 			break;
 		case InstrDual:
 			if ((ctxt->modrm >> 6) == 3)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 134/195] KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (132 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 133/195] KVM: x86: Protect x86_decode_insn from Spectre-v1/L1TF attacks Greg Kroah-Hartman
@ 2020-02-10 12:33 ` " Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 135/195] KVM: x86: Fix potential put_fpu() w/o load_fpu() on MPX platform Greg Kroah-Hartman
                   ` (64 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nick Finco, Marios Pomonis,
	Andrew Honig, Jim Mattson, Paolo Bonzini

From: Marios Pomonis <pomonis@google.com>

commit 25a5edea71b7c154b6a0b8cec14c711cafa31d26 upstream.

This fixes a Spectre-v1/L1TF vulnerability in fixed_msr_to_seg_unit().
This function contains index computations based on the
(attacker-controlled) MSR number.

Fixes: de9aef5e1ad6 ("KVM: MTRR: introduce fixed_mtrr_segment table")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/mtrr.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/arch/x86/kvm/mtrr.c
+++ b/arch/x86/kvm/mtrr.c
@@ -194,11 +194,15 @@ static bool fixed_msr_to_seg_unit(u32 ms
 		break;
 	case MSR_MTRRfix16K_80000 ... MSR_MTRRfix16K_A0000:
 		*seg = 1;
-		*unit = msr - MSR_MTRRfix16K_80000;
+		*unit = array_index_nospec(
+			msr - MSR_MTRRfix16K_80000,
+			MSR_MTRRfix16K_A0000 - MSR_MTRRfix16K_80000 + 1);
 		break;
 	case MSR_MTRRfix4K_C0000 ... MSR_MTRRfix4K_F8000:
 		*seg = 2;
-		*unit = msr - MSR_MTRRfix4K_C0000;
+		*unit = array_index_nospec(
+			msr - MSR_MTRRfix4K_C0000,
+			MSR_MTRRfix4K_F8000 - MSR_MTRRfix4K_C0000 + 1);
 		break;
 	default:
 		return false;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 135/195] KVM: x86: Fix potential put_fpu() w/o load_fpu() on MPX platform
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (133 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 134/195] KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() " Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 136/195] KVM: PPC: Book3S HV: Uninit vCPU if vcore creation fails Greg Kroah-Hartman
                   ` (63 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Sean Christopherson, Paolo Bonzini

From: Sean Christopherson <sean.j.christopherson@intel.com>

commit f958bd2314d117f8c29f4821401bc1925bc2e5ef upstream.

Unlike most state managed by XSAVE, MPX is initialized to zero on INIT.
Because INITs are usually recognized in the context of a VCPU_RUN call,
kvm_vcpu_reset() puts the guest's FPU so that the FPU state is resident
in memory, zeros the MPX state, and reloads FPU state to hardware.  But,
in the unlikely event that an INIT is recognized during
kvm_arch_vcpu_ioctl_get_mpstate() via kvm_apic_accept_events(),
kvm_vcpu_reset() will call kvm_put_guest_fpu() without a preceding
kvm_load_guest_fpu() and corrupt the guest's FPU state (and possibly
userspace's FPU state as well).

Given that MPX is being removed from the kernel[*], fix the bug with the
simple-but-ugly approach of loading the guest's FPU during
KVM_GET_MP_STATE.

[*] See commit f240652b6032b ("x86/mpx: Remove MPX APIs").

Fixes: f775b13eedee2 ("x86,kvm: move qemu/guest FPU switching out to vcpu_run")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/x86.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8235,6 +8235,8 @@ int kvm_arch_vcpu_ioctl_get_mpstate(stru
 				    struct kvm_mp_state *mp_state)
 {
 	vcpu_load(vcpu);
+	if (kvm_mpx_supported())
+		kvm_load_guest_fpu(vcpu);
 
 	kvm_apic_accept_events(vcpu);
 	if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED &&
@@ -8243,6 +8245,8 @@ int kvm_arch_vcpu_ioctl_get_mpstate(stru
 	else
 		mp_state->mp_state = vcpu->arch.mp_state;
 
+	if (kvm_mpx_supported())
+		kvm_put_guest_fpu(vcpu);
 	vcpu_put(vcpu);
 	return 0;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 136/195] KVM: PPC: Book3S HV: Uninit vCPU if vcore creation fails
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (134 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 135/195] KVM: x86: Fix potential put_fpu() w/o load_fpu() on MPX platform Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 137/195] KVM: PPC: Book3S PR: Free shared page if mmu initialization fails Greg Kroah-Hartman
                   ` (62 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Greg Kurz, Sean Christopherson,
	Paul Mackerras, Paolo Bonzini

From: Sean Christopherson <sean.j.christopherson@intel.com>

commit 1a978d9d3e72ddfa40ac60d26301b154247ee0bc upstream.

Call kvm_vcpu_uninit() if vcore creation fails to avoid leaking any
resources allocated by kvm_vcpu_init(), i.e. the vcpu->run page.

Fixes: 371fefd6f2dc4 ("KVM: PPC: Allow book3s_hv guests to use SMT processor modes")
Cc: stable@vger.kernel.org
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/kvm/book3s_hv.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2065,7 +2065,7 @@ static struct kvm_vcpu *kvmppc_core_vcpu
 	mutex_unlock(&kvm->lock);
 
 	if (!vcore)
-		goto free_vcpu;
+		goto uninit_vcpu;
 
 	spin_lock(&vcore->lock);
 	++vcore->num_threads;
@@ -2082,6 +2082,8 @@ static struct kvm_vcpu *kvmppc_core_vcpu
 
 	return vcpu;
 
+uninit_vcpu:
+	kvm_vcpu_uninit(vcpu);
 free_vcpu:
 	kmem_cache_free(kvm_vcpu_cache, vcpu);
 out:



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 137/195] KVM: PPC: Book3S PR: Free shared page if mmu initialization fails
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (135 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 136/195] KVM: PPC: Book3S HV: Uninit vCPU if vcore creation fails Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 138/195] x86/kvm: Be careful not to clear KVM_VCPU_FLUSH_TLB bit Greg Kroah-Hartman
                   ` (61 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Greg Kurz, Sean Christopherson,
	Paul Mackerras, Paolo Bonzini

From: Sean Christopherson <sean.j.christopherson@intel.com>

commit cb10bf9194f4d2c5d830eddca861f7ca0fecdbb4 upstream.

Explicitly free the shared page if kvmppc_mmu_init() fails during
kvmppc_core_vcpu_create(), as the page is freed only in
kvmppc_core_vcpu_free(), which is not reached via kvm_vcpu_uninit().

Fixes: 96bc451a15329 ("KVM: PPC: Introduce shared page")
Cc: stable@vger.kernel.org
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/kvm/book3s_pr.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -1772,10 +1772,12 @@ static struct kvm_vcpu *kvmppc_core_vcpu
 
 	err = kvmppc_mmu_init(vcpu);
 	if (err < 0)
-		goto uninit_vcpu;
+		goto free_shared_page;
 
 	return vcpu;
 
+free_shared_page:
+	free_page((unsigned long)vcpu->arch.shared);
 uninit_vcpu:
 	kvm_vcpu_uninit(vcpu);
 free_shadow_vcpu:



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 138/195] x86/kvm: Be careful not to clear KVM_VCPU_FLUSH_TLB bit
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (136 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 137/195] KVM: PPC: Book3S PR: Free shared page if mmu initialization fails Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 139/195] KVM: x86: Dont let userspace set host-reserved cr4 bits Greg Kroah-Hartman
                   ` (60 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Boris Ostrovsky, Joao Martins, Paolo Bonzini

From: Boris Ostrovsky <boris.ostrovsky@oracle.com>

commit 8c6de56a42e0c657955e12b882a81ef07d1d073e upstream.

kvm_steal_time_set_preempted() may accidentally clear KVM_VCPU_FLUSH_TLB
bit if it is called more than once while VCPU is preempted.

This is part of CVE-2019-3016.

(This bug was also independently discovered by Jim Mattson
<jmattson@google.com>)

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/x86.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3244,6 +3244,9 @@ static void kvm_steal_time_set_preempted
 	if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
 		return;
 
+	if (vcpu->arch.st.steal.preempted)
+		return;
+
 	vcpu->arch.st.steal.preempted = KVM_VCPU_PREEMPTED;
 
 	kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 139/195] KVM: x86: Dont let userspace set host-reserved cr4 bits
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (137 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 138/195] x86/kvm: Be careful not to clear KVM_VCPU_FLUSH_TLB bit Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 140/195] KVM: x86: Free wbinvd_dirty_mask if vCPU creation fails Greg Kroah-Hartman
                   ` (59 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Jun Nakajima, Sean Christopherson,
	Paolo Bonzini

From: Sean Christopherson <sean.j.christopherson@intel.com>

commit b11306b53b2540c6ba068c4deddb6a17d9f8d95b upstream.

Calculate the host-reserved cr4 bits at runtime based on the system's
capabilities (using logic similar to __do_cpuid_func()), and use the
dynamically generated mask for the reserved bit check in kvm_set_cr4()
instead using of the static CR4_RESERVED_BITS define.  This prevents
userspace from "enabling" features in cr4 that are not supported by the
system, e.g. by ignoring KVM_GET_SUPPORTED_CPUID and specifying a bogus
CPUID for the vCPU.

Allowing userspace to set unsupported bits in cr4 can lead to a variety
of undesirable behavior, e.g. failed VM-Enter, and in general increases
KVM's attack surface.  A crafty userspace can even abuse CR4.LA57 to
induce an unchecked #GP on a WRMSR.

On a platform without LA57 support:

  KVM_SET_CPUID2 // CPUID_7_0_ECX.LA57 = 1
  KVM_SET_SREGS  // CR4.LA57 = 1
  KVM_SET_MSRS   // KERNEL_GS_BASE = 0x0004000000000000
  KVM_RUN

leads to a #GP when writing KERNEL_GS_BASE into hardware:

  unchecked MSR access error: WRMSR to 0xc0000102 (tried to write 0x0004000000000000)
  at rIP: 0xffffffffa00f239a (vmx_prepare_switch_to_guest+0x10a/0x1d0 [kvm_intel])
  Call Trace:
   kvm_arch_vcpu_ioctl_run+0x671/0x1c70 [kvm]
   kvm_vcpu_ioctl+0x36b/0x5d0 [kvm]
   do_vfs_ioctl+0xa1/0x620
   ksys_ioctl+0x66/0x70
   __x64_sys_ioctl+0x16/0x20
   do_syscall_64+0x4c/0x170
   entry_SYSCALL_64_after_hwframe+0x44/0xa9
  RIP: 0033:0x7fc08133bf47

Note, the above sequence fails VM-Enter due to invalid guest state.
Userspace can allow VM-Enter to succeed (after the WRMSR #GP) by adding
a KVM_SET_SREGS w/ CR4.LA57=0 after KVM_SET_MSRS, in which case KVM will
technically leak the host's KERNEL_GS_BASE into the guest.  But, as
KERNEL_GS_BASE is a userspace-defined value/address, the leak is largely
benign as a malicious userspace would simply be exposing its own data to
the guest, and attacking a benevolent userspace would require multiple
bugs in the userspace VMM.

Cc: stable@vger.kernel.org
Cc: Jun Nakajima <jun.nakajima@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/x86.c |   35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -92,6 +92,8 @@ u64 __read_mostly efer_reserved_bits = ~
 static u64 __read_mostly efer_reserved_bits = ~((u64)EFER_SCE);
 #endif
 
+static u64 __read_mostly cr4_reserved_bits = CR4_RESERVED_BITS;
+
 #define VM_STAT(x, ...) offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__
 #define VCPU_STAT(x, ...) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__
 
@@ -793,9 +795,38 @@ int kvm_set_xcr(struct kvm_vcpu *vcpu, u
 }
 EXPORT_SYMBOL_GPL(kvm_set_xcr);
 
+static u64 kvm_host_cr4_reserved_bits(struct cpuinfo_x86 *c)
+{
+	u64 reserved_bits = CR4_RESERVED_BITS;
+
+	if (!cpu_has(c, X86_FEATURE_XSAVE))
+		reserved_bits |= X86_CR4_OSXSAVE;
+
+	if (!cpu_has(c, X86_FEATURE_SMEP))
+		reserved_bits |= X86_CR4_SMEP;
+
+	if (!cpu_has(c, X86_FEATURE_SMAP))
+		reserved_bits |= X86_CR4_SMAP;
+
+	if (!cpu_has(c, X86_FEATURE_FSGSBASE))
+		reserved_bits |= X86_CR4_FSGSBASE;
+
+	if (!cpu_has(c, X86_FEATURE_PKU))
+		reserved_bits |= X86_CR4_PKE;
+
+	if (!cpu_has(c, X86_FEATURE_LA57) &&
+	    !(cpuid_ecx(0x7) & bit(X86_FEATURE_LA57)))
+		reserved_bits |= X86_CR4_LA57;
+
+	if (!cpu_has(c, X86_FEATURE_UMIP) && !kvm_x86_ops->umip_emulated())
+		reserved_bits |= X86_CR4_UMIP;
+
+	return reserved_bits;
+}
+
 static int kvm_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 {
-	if (cr4 & CR4_RESERVED_BITS)
+	if (cr4 & cr4_reserved_bits)
 		return -EINVAL;
 
 	if (!guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) && (cr4 & X86_CR4_OSXSAVE))
@@ -8864,6 +8895,8 @@ int kvm_arch_hardware_setup(void)
 	if (r != 0)
 		return r;
 
+	cr4_reserved_bits = kvm_host_cr4_reserved_bits(&boot_cpu_data);
+
 	if (kvm_has_tsc_control) {
 		/*
 		 * Make sure the user can only configure tsc_khz values that



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 140/195] KVM: x86: Free wbinvd_dirty_mask if vCPU creation fails
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (138 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 139/195] KVM: x86: Dont let userspace set host-reserved cr4 bits Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 141/195] KVM: s390: do not clobber registers during guest reset/store status Greg Kroah-Hartman
                   ` (58 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Sean Christopherson, Paolo Bonzini

From: Sean Christopherson <sean.j.christopherson@intel.com>

commit 16be9ddea268ad841457a59109963fff8c9de38d upstream.

Free the vCPU's wbinvd_dirty_mask if vCPU creation fails after
kvm_arch_vcpu_init(), e.g. when installing the vCPU's file descriptor.
Do the freeing by calling kvm_arch_vcpu_free() instead of open coding
the freeing.  This adds a likely superfluous, but ultimately harmless,
call to kvmclock_reset(), which only clears vcpu->arch.pv_time_enabled.
Using kvm_arch_vcpu_free() allows for additional cleanup in the future.

Fixes: f5f48ee15c2ee ("KVM: VMX: Execute WBINVD to keep data consistency with assigned devices")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/x86.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8702,7 +8702,7 @@ void kvm_arch_vcpu_destroy(struct kvm_vc
 	kvm_mmu_unload(vcpu);
 	vcpu_put(vcpu);
 
-	kvm_x86_ops->vcpu_free(vcpu);
+	kvm_arch_vcpu_free(vcpu);
 }
 
 void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 141/195] KVM: s390: do not clobber registers during guest reset/store status
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (139 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 140/195] KVM: x86: Free wbinvd_dirty_mask if vCPU creation fails Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 142/195] clk: tegra: Mark fuse clock as critical Greg Kroah-Hartman
                   ` (57 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, stable, Christian Borntraeger,
	David Hildenbrand, Cornelia Huck, Janosch Frank

From: Christian Borntraeger <borntraeger@de.ibm.com>

commit 55680890ea78be0df5e1384989f1be835043c084 upstream.

The initial CPU reset clobbers the userspace fpc and the store status
ioctl clobbers the guest acrs + fpr.  As these calls are only done via
ioctl (and not via vcpu_run), no CPU context is loaded, so we can (and
must) act directly on the sync regs, not on the thread context.

Cc: stable@kernel.org
Fixes: e1788bb995be ("KVM: s390: handle floating point registers in the run ioctl not in vcpu_put/load")
Fixes: 31d8b8d41a7e ("KVM: s390: handle access registers in the run ioctl not in vcpu_put/load")
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Link: https://lore.kernel.org/r/20200131100205.74720-2-frankja@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/s390/kvm/kvm-s390.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2564,9 +2564,7 @@ static void kvm_s390_vcpu_initial_reset(
 	vcpu->arch.sie_block->gcr[14] = CR14_UNUSED_32 |
 					CR14_UNUSED_33 |
 					CR14_EXTERNAL_DAMAGE_SUBMASK;
-	/* make sure the new fpc will be lazily loaded */
-	save_fpu_regs();
-	current->thread.fpu.fpc = 0;
+	vcpu->run->s.regs.fpc = 0;
 	vcpu->arch.sie_block->gbea = 1;
 	vcpu->arch.sie_block->pp = 0;
 	vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
@@ -3994,7 +3992,7 @@ long kvm_arch_vcpu_ioctl(struct file *fi
 	switch (ioctl) {
 	case KVM_S390_STORE_STATUS:
 		idx = srcu_read_lock(&vcpu->kvm->srcu);
-		r = kvm_s390_vcpu_store_status(vcpu, arg);
+		r = kvm_s390_store_status_unloaded(vcpu, arg);
 		srcu_read_unlock(&vcpu->kvm->srcu, idx);
 		break;
 	case KVM_S390_SET_INITIAL_PSW: {



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 142/195] clk: tegra: Mark fuse clock as critical
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (140 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 141/195] KVM: s390: do not clobber registers during guest reset/store status Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 143/195] drm/amd/dm/mst: Ignore payload update failures Greg Kroah-Hartman
                   ` (56 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Jonathan Hunter, Stephen Warren,
	Thierry Reding

From: Stephen Warren <swarren@nvidia.com>

commit bf83b96f87ae2abb1e535306ea53608e8de5dfbb upstream.

For a little over a year, U-Boot on Tegra124 has configured the flow
controller to perform automatic RAM re-repair on off->on power
transitions of the CPU rail[1]. This is mandatory for correct operation
of Tegra124. However, RAM re-repair relies on certain clocks, which the
kernel must enable and leave running. The fuse clock is one of those
clocks. Mark this clock as critical so that LP1 power mode (system
suspend) operates correctly.

[1] 3cc7942a4ae5 ARM: tegra: implement RAM repair

Reported-by: Jonathan Hunter <jonathanh@nvidia.com>
Cc: stable@vger.kernel.org
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/clk/tegra/clk-tegra-periph.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/clk/tegra/clk-tegra-periph.c
+++ b/drivers/clk/tegra/clk-tegra-periph.c
@@ -799,7 +799,11 @@ static struct tegra_periph_init_data gat
 	GATE("ahbdma", "hclk", 33, 0, tegra_clk_ahbdma, 0),
 	GATE("apbdma", "pclk", 34, 0, tegra_clk_apbdma, 0),
 	GATE("kbc", "clk_32k", 36, TEGRA_PERIPH_ON_APB | TEGRA_PERIPH_NO_RESET, tegra_clk_kbc, 0),
-	GATE("fuse", "clk_m", 39, TEGRA_PERIPH_ON_APB, tegra_clk_fuse, 0),
+	/*
+	 * Critical for RAM re-repair operation, which must occur on resume
+	 * from LP1 system suspend and as part of CCPLEX cluster switching.
+	 */
+	GATE("fuse", "clk_m", 39, TEGRA_PERIPH_ON_APB, tegra_clk_fuse, CLK_IS_CRITICAL),
 	GATE("fuse_burn", "clk_m", 39, TEGRA_PERIPH_ON_APB, tegra_clk_fuse_burn, 0),
 	GATE("kfuse", "clk_m", 40, TEGRA_PERIPH_ON_APB, tegra_clk_kfuse, 0),
 	GATE("apbif", "clk_m", 107, TEGRA_PERIPH_ON_APB, tegra_clk_apbif, 0),



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 143/195] drm/amd/dm/mst: Ignore payload update failures
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (141 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 142/195] clk: tegra: Mark fuse clock as critical Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 144/195] percpu: Separate decrypted varaibles anytime encryption can be enabled Greg Kroah-Hartman
                   ` (55 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Mikita Lipski, Lyude Paul,
	Harry Wentland, Alex Deucher

From: Lyude Paul <lyude@redhat.com>

commit 58fe03d6dec908a1bec07eea7e94907af5c07eec upstream.

Disabling a display on MST can potentially happen after the entire MST
topology has been removed, which means that we can't communicate with
the topology at all in this scenario. Likewise, this also means that we
can't properly update payloads on the topology and as such, it's a good
idea to ignore payload update failures when disabling displays.
Currently, amdgpu makes the mistake of halting the payload update
process when any payload update failures occur, resulting in leaving
DC's local copies of the payload tables out of date.

This ends up causing problems with hotplugging MST topologies, and
causes modesets on the second hotplug to fail like so:

[drm] Failed to updateMST allocation table forpipe idx:1
------------[ cut here ]------------
WARNING: CPU: 5 PID: 1511 at
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:2677
update_mst_stream_alloc_table+0x11e/0x130 [amdgpu]
Modules linked in: cdc_ether usbnet fuse xt_conntrack nf_conntrack
nf_defrag_ipv6 libcrc32c nf_defrag_ipv4 ipt_REJECT nf_reject_ipv4
nft_counter nft_compat nf_tables nfnetlink tun bridge stp llc sunrpc
vfat fat wmi_bmof uvcvideo snd_hda_codec_realtek snd_hda_codec_generic
snd_hda_codec_hdmi videobuf2_vmalloc snd_hda_intel videobuf2_memops
videobuf2_v4l2 snd_intel_dspcfg videobuf2_common crct10dif_pclmul
snd_hda_codec videodev crc32_pclmul snd_hwdep snd_hda_core
ghash_clmulni_intel snd_seq mc joydev pcspkr snd_seq_device snd_pcm
sp5100_tco k10temp i2c_piix4 snd_timer thinkpad_acpi ledtrig_audio snd
wmi soundcore video i2c_scmi acpi_cpufreq ip_tables amdgpu(O)
rtsx_pci_sdmmc amd_iommu_v2 gpu_sched mmc_core i2c_algo_bit ttm
drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec drm
crc32c_intel serio_raw hid_multitouch r8152 mii nvme r8169 nvme_core
rtsx_pci pinctrl_amd
CPU: 5 PID: 1511 Comm: gnome-shell Tainted: G           O      5.5.0-rc7Lyude-Test+ #4
Hardware name: LENOVO FA495SIT26/FA495SIT26, BIOS R12ET22W(0.22 ) 01/31/2019
RIP: 0010:update_mst_stream_alloc_table+0x11e/0x130 [amdgpu]
Code: 28 00 00 00 75 2b 48 8d 65 e0 5b 41 5c 41 5d 41 5e 5d c3 0f b6 06
49 89 1c 24 41 88 44 24 08 0f b6 46 01 41 88 44 24 09 eb 93 <0f> 0b e9
2f ff ff ff e8 a6 82 a3 c2 66 0f 1f 44 00 00 0f 1f 44 00
RSP: 0018:ffffac428127f5b0 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffff8d1e166eee80 RCX: 0000000000000000
RDX: ffffac428127f668 RSI: ffff8d1e166eee80 RDI: ffffac428127f610
RBP: ffffac428127f640 R08: ffffffffc03d94a8 R09: 0000000000000000
R10: ffff8d1e24b02000 R11: ffffac428127f5b0 R12: ffff8d1e1b83d000
R13: ffff8d1e1bea0b08 R14: 0000000000000002 R15: 0000000000000002
FS:  00007fab23ffcd80(0000) GS:ffff8d1e28b40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f151f1711e8 CR3: 00000005997c0000 CR4: 00000000003406e0
Call Trace:
 ? mutex_lock+0xe/0x30
 dc_link_allocate_mst_payload+0x9a/0x210 [amdgpu]
 ? dm_read_reg_func+0x39/0xb0 [amdgpu]
 ? core_link_enable_stream+0x656/0x730 [amdgpu]
 core_link_enable_stream+0x656/0x730 [amdgpu]
 dce110_apply_ctx_to_hw+0x58e/0x5d0 [amdgpu]
 ? dcn10_verify_allow_pstate_change_high+0x1d/0x280 [amdgpu]
 ? dcn10_wait_for_mpcc_disconnect+0x3c/0x130 [amdgpu]
 dc_commit_state+0x292/0x770 [amdgpu]
 ? add_timer+0x101/0x1f0
 ? ttm_bo_put+0x1a1/0x2f0 [ttm]
 amdgpu_dm_atomic_commit_tail+0xb59/0x1ff0 [amdgpu]
 ? amdgpu_move_blit.constprop.0+0xb8/0x1f0 [amdgpu]
 ? amdgpu_bo_move+0x16d/0x2b0 [amdgpu]
 ? ttm_bo_handle_move_mem+0x118/0x570 [ttm]
 ? ttm_bo_validate+0x134/0x150 [ttm]
 ? dm_plane_helper_prepare_fb+0x1b9/0x2a0 [amdgpu]
 ? _cond_resched+0x15/0x30
 ? wait_for_completion_timeout+0x38/0x160
 ? _cond_resched+0x15/0x30
 ? wait_for_completion_interruptible+0x33/0x190
 commit_tail+0x94/0x130 [drm_kms_helper]
 drm_atomic_helper_commit+0x113/0x140 [drm_kms_helper]
 drm_atomic_helper_set_config+0x70/0xb0 [drm_kms_helper]
 drm_mode_setcrtc+0x194/0x6a0 [drm]
 ? _cond_resched+0x15/0x30
 ? mutex_lock+0xe/0x30
 ? drm_mode_getcrtc+0x180/0x180 [drm]
 drm_ioctl_kernel+0xaa/0xf0 [drm]
 drm_ioctl+0x208/0x390 [drm]
 ? drm_mode_getcrtc+0x180/0x180 [drm]
 amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
 do_vfs_ioctl+0x458/0x6d0
 ksys_ioctl+0x5e/0x90
 __x64_sys_ioctl+0x16/0x20
 do_syscall_64+0x55/0x1b0
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fab2121f87b
Code: 0f 1e fa 48 8b 05 0d 96 2c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff
ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 8b 0d dd 95 2c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd045f9068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffd045f90a0 RCX: 00007fab2121f87b
RDX: 00007ffd045f90a0 RSI: 00000000c06864a2 RDI: 000000000000000b
RBP: 00007ffd045f90a0 R08: 0000000000000000 R09: 000055dbd2985d10
R10: 000055dbd2196280 R11: 0000000000000246 R12: 00000000c06864a2
R13: 000000000000000b R14: 0000000000000000 R15: 000055dbd2196280
---[ end trace 6ea888c24d2059cd ]---

Note as well, I have only been able to reproduce this on setups with 2
MST displays.

Changes since v1:
* Don't return false when part 1 or part 2 of updating the payloads
  fails, we don't want to abort at any step of the process even if
  things fail

Reviewed-by: Mikita Lipski <Mikita.Lipski@amd.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c |   13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -248,7 +248,8 @@ bool dm_helpers_dp_mst_write_payload_all
 		drm_dp_mst_reset_vcpi_slots(mst_mgr, mst_port);
 	}
 
-	ret = drm_dp_update_payload_part1(mst_mgr);
+	/* It's OK for this to fail */
+	drm_dp_update_payload_part1(mst_mgr);
 
 	/* mst_mgr->->payloads are VC payload notify MST branch using DPCD or
 	 * AUX message. The sequence is slot 1-63 allocated sequence for each
@@ -257,9 +258,6 @@ bool dm_helpers_dp_mst_write_payload_all
 
 	get_payload_table(aconnector, proposed_table);
 
-	if (ret)
-		return false;
-
 	return true;
 }
 
@@ -310,7 +308,6 @@ bool dm_helpers_dp_mst_send_payload_allo
 	struct amdgpu_dm_connector *aconnector;
 	struct drm_dp_mst_topology_mgr *mst_mgr;
 	struct drm_dp_mst_port *mst_port;
-	int ret;
 
 	aconnector = stream->sink->priv;
 
@@ -324,10 +321,8 @@ bool dm_helpers_dp_mst_send_payload_allo
 	if (!mst_mgr->mst_state)
 		return false;
 
-	ret = drm_dp_update_payload_part2(mst_mgr);
-
-	if (ret)
-		return false;
+	/* It's OK for this to fail */
+	drm_dp_update_payload_part2(mst_mgr);
 
 	if (!enable)
 		drm_dp_mst_deallocate_vcpi(mst_mgr, mst_port);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 144/195] percpu: Separate decrypted varaibles anytime encryption can be enabled
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (142 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 143/195] drm/amd/dm/mst: Ignore payload update failures Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 145/195] scsi: qla2xxx: Fix the endianness of the qla82xx_get_fw_size() return type Greg Kroah-Hartman
                   ` (54 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Erdem Aktas, David Rientjes, Dennis Zhou

From: Erdem Aktas <erdemaktas@google.com>

commit 264b0d2bee148073c117e7bbbde5be7125a53be1 upstream.

CONFIG_VIRTUALIZATION may not be enabled for memory encrypted guests.  If
disabled, decrypted per-CPU variables may end up sharing the same page
with variables that should be left encrypted.

Always separate per-CPU variables that should be decrypted into their own
page anytime memory encryption can be enabled in the guest rather than
rely on any other config option that may not be enabled.

Fixes: ac26963a1175 ("percpu: Introduce DEFINE_PER_CPU_DECRYPTED")
Cc: stable@vger.kernel.org # 4.15+
Signed-off-by: Erdem Aktas <erdemaktas@google.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/linux/percpu-defs.h |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -176,8 +176,7 @@
  * Declaration/definition used for per-CPU variables that should be accessed
  * as decrypted when memory encryption is enabled in the guest.
  */
-#if defined(CONFIG_VIRTUALIZATION) && defined(CONFIG_AMD_MEM_ENCRYPT)
-
+#ifdef CONFIG_AMD_MEM_ENCRYPT
 #define DECLARE_PER_CPU_DECRYPTED(type, name)				\
 	DECLARE_PER_CPU_SECTION(type, name, "..decrypted")
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 145/195] scsi: qla2xxx: Fix the endianness of the qla82xx_get_fw_size() return type
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (143 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 144/195] percpu: Separate decrypted varaibles anytime encryption can be enabled Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 146/195] scsi: csiostor: Adjust indentation in csio_device_reset Greg Kroah-Hartman
                   ` (53 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Himanshu Madhani, Quinn Tran,
	Martin Wilck, Daniel Wagner, Roman Bolshakov, Bart Van Assche,
	Martin K. Petersen

From: Bart Van Assche <bvanassche@acm.org>

commit 3f5f7335e5e234e340b48ecb24c2aba98a61f934 upstream.

Since qla82xx_get_fw_size() returns a number in CPU-endian format, change
its return type from __le32 into u32. This patch does not change any
functionality.

Fixes: 9c2b297572bf ("[SCSI] qla2xxx: Support for loading Unified ROM Image (URI) format firmware file.")
Cc: Himanshu Madhani <hmadhani@marvell.com>
Cc: Quinn Tran <qutran@marvell.com>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Daniel Wagner <dwagner@suse.de>
Cc: Roman Bolshakov <r.bolshakov@yadro.com>
Link: https://lore.kernel.org/r/20191219004905.39586-1-bvanassche@acm.org
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_nx.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_nx.c
+++ b/drivers/scsi/qla2xxx/qla_nx.c
@@ -1605,8 +1605,7 @@ qla82xx_get_bootld_offset(struct qla_hw_
 	return (u8 *)&ha->hablob->fw->data[offset];
 }
 
-static __le32
-qla82xx_get_fw_size(struct qla_hw_data *ha)
+static u32 qla82xx_get_fw_size(struct qla_hw_data *ha)
 {
 	struct qla82xx_uri_data_desc *uri_desc = NULL;
 
@@ -1617,7 +1616,7 @@ qla82xx_get_fw_size(struct qla_hw_data *
 			return cpu_to_le32(uri_desc->size);
 	}
 
-	return cpu_to_le32(*(u32 *)&ha->hablob->fw->data[FW_SIZE_OFFSET]);
+	return get_unaligned_le32(&ha->hablob->fw->data[FW_SIZE_OFFSET]);
 }
 
 static u8 *
@@ -1808,7 +1807,7 @@ qla82xx_fw_load_from_blob(struct qla_hw_
 	}
 
 	flashaddr = FLASH_ADDR_START;
-	size = (__force u32)qla82xx_get_fw_size(ha) / 8;
+	size = qla82xx_get_fw_size(ha) / 8;
 	ptr64 = (u64 *)qla82xx_get_fw_offs(ha);
 
 	for (i = 0; i < size; i++) {



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 146/195] scsi: csiostor: Adjust indentation in csio_device_reset
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (144 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 145/195] scsi: qla2xxx: Fix the endianness of the qla82xx_get_fw_size() return type Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 147/195] scsi: qla4xxx: Adjust indentation in qla4xxx_mem_free Greg Kroah-Hartman
                   ` (52 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, Martin K. Petersen

From: Nathan Chancellor <natechancellor@gmail.com>

commit a808a04c861782e31fc30e342a619c144aaee14a upstream.

Clang warns:

../drivers/scsi/csiostor/csio_scsi.c:1386:3: warning: misleading
indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
         csio_lnodes_exit(hw, 1);
         ^
../drivers/scsi/csiostor/csio_scsi.c:1382:2: note: previous statement is
here
        if (*buf != '1')
        ^
1 warning generated.

This warning occurs because there is a space after the tab on this
line.  Remove it so that the indentation is consistent with the Linux
kernel coding style and clang no longer warns.

Fixes: a3667aaed569 ("[SCSI] csiostor: Chelsio FCoE offload driver")
Link: https://github.com/ClangBuiltLinux/linux/issues/818
Link: https://lore.kernel.org/r/20191218014726.8455-1-natechancellor@gmail.com
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/csiostor/csio_scsi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/scsi/csiostor/csio_scsi.c
+++ b/drivers/scsi/csiostor/csio_scsi.c
@@ -1383,7 +1383,7 @@ csio_device_reset(struct device *dev,
 		return -EINVAL;
 
 	/* Delete NPIV lnodes */
-	 csio_lnodes_exit(hw, 1);
+	csio_lnodes_exit(hw, 1);
 
 	/* Block upper IOs */
 	csio_lnodes_block_request(hw);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 147/195] scsi: qla4xxx: Adjust indentation in qla4xxx_mem_free
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (145 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 146/195] scsi: csiostor: Adjust indentation in csio_device_reset Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 148/195] scsi: ufs: Recheck bkops level if bkops is disabled Greg Kroah-Hartman
                   ` (51 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Manish Rangankar, Nick Desaulniers,
	Nathan Chancellor, Martin K. Petersen

From: Nathan Chancellor <natechancellor@gmail.com>

commit aa8679736a82386551eb9f3ea0e6ebe2c0e99104 upstream.

Clang warns:

../drivers/scsi/qla4xxx/ql4_os.c:4148:3: warning: misleading
indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
         if (ha->fw_dump)
         ^
../drivers/scsi/qla4xxx/ql4_os.c:4144:2: note: previous statement is
here
        if (ha->queues)
        ^
1 warning generated.

This warning occurs because there is a space after the tab on this
line.  Remove it so that the indentation is consistent with the Linux
kernel coding style and clang no longer warns.

Fixes: 068237c87c64 ("[SCSI] qla4xxx: Capture minidump for ISP82XX on firmware failure")
Link: https://github.com/ClangBuiltLinux/linux/issues/819
Link: https://lore.kernel.org/r/20191218015252.20890-1-natechancellor@gmail.com
Acked-by: Manish Rangankar <mrangankar@marvell.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/qla4xxx/ql4_os.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -4146,7 +4146,7 @@ static void qla4xxx_mem_free(struct scsi
 		dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
 				  ha->queues_dma);
 
-	 if (ha->fw_dump)
+	if (ha->fw_dump)
 		vfree(ha->fw_dump);
 
 	ha->queues_len = 0;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 148/195] scsi: ufs: Recheck bkops level if bkops is disabled
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (146 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 147/195] scsi: qla4xxx: Adjust indentation in qla4xxx_mem_free Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 149/195] phy: qualcomm: Adjust indentation in read_poll_timeout Greg Kroah-Hartman
                   ` (50 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Bean Huo, Alim Akhtar, Asutosh Das,
	Can Guo, Martin K. Petersen

From: Asutosh Das <asutoshd@codeaurora.org>

commit 24366c2afbb0539fb14eff330d4e3a5db5c0a3ef upstream.

bkops level should be rechecked upon receiving an exception.  Currently the
level is being cached and never updated.

Update bkops each time the level is checked.  Also do not use the cached
bkops level value if it is disabled and then enabled.

Fixes: afdfff59a0e0 (scsi: ufs: handle non spec compliant bkops behaviour by device)
Link: https://lore.kernel.org/r/1574751214-8321-2-git-send-email-cang@qti.qualcomm.com
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/ufs/ufshcd.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5044,6 +5044,7 @@ static int ufshcd_disable_auto_bkops(str
 
 	hba->auto_bkops_enabled = false;
 	trace_ufshcd_auto_bkops_state(dev_name(hba->dev), "Disabled");
+	hba->is_urgent_bkops_lvl_checked = false;
 out:
 	return err;
 }
@@ -5068,6 +5069,7 @@ static void ufshcd_force_reset_auto_bkop
 		hba->ee_ctrl_mask &= ~MASK_EE_URGENT_BKOPS;
 		ufshcd_disable_auto_bkops(hba);
 	}
+	hba->is_urgent_bkops_lvl_checked = false;
 }
 
 static inline int ufshcd_get_bkops_status(struct ufs_hba *hba, u32 *status)
@@ -5114,6 +5116,7 @@ static int ufshcd_bkops_ctrl(struct ufs_
 		err = ufshcd_enable_auto_bkops(hba);
 	else
 		err = ufshcd_disable_auto_bkops(hba);
+	hba->urgent_bkops_lvl = curr_status;
 out:
 	return err;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 149/195] phy: qualcomm: Adjust indentation in read_poll_timeout
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (147 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 148/195] scsi: ufs: Recheck bkops level if bkops is disabled Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 150/195] ext2: Adjust indentation in ext2_fill_super Greg Kroah-Hartman
                   ` (49 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, Bjorn Andersson,
	Kishon Vijay Abraham I

From: Nathan Chancellor <natechancellor@gmail.com>

commit a89806c998ee123bb9c0f18526e55afd12c0c0ab upstream.

Clang warns:

../drivers/phy/qualcomm/phy-qcom-apq8064-sata.c:83:4: warning:
misleading indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
                 usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
                 ^
../drivers/phy/qualcomm/phy-qcom-apq8064-sata.c:80:3: note: previous
statement is here
                if (readl_relaxed(addr) & mask)
                ^
1 warning generated.

This warning occurs because there is a space after the tab on this line.
Remove it so that the indentation is consistent with the Linux kernel
coding style and clang no longer warns.

Fixes: 1de990d8a169 ("phy: qcom: Add driver for QCOM APQ8064 SATA PHY")
Link: https://github.com/ClangBuiltLinux/linux/issues/816
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/phy/qualcomm/phy-qcom-apq8064-sata.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/phy/qualcomm/phy-qcom-apq8064-sata.c
+++ b/drivers/phy/qualcomm/phy-qcom-apq8064-sata.c
@@ -88,7 +88,7 @@ static int read_poll_timeout(void __iome
 		if (readl_relaxed(addr) & mask)
 			return 0;
 
-		 usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
+		usleep_range(DELAY_INTERVAL_US, DELAY_INTERVAL_US + 50);
 	} while (!time_after(jiffies, timeout));
 
 	return (readl_relaxed(addr) & mask) ? 0 : -ETIMEDOUT;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 150/195] ext2: Adjust indentation in ext2_fill_super
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (148 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 149/195] phy: qualcomm: Adjust indentation in read_poll_timeout Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 151/195] powerpc/44x: Adjust indentation in ibm4xx_denali_fixup_memsize Greg Kroah-Hartman
                   ` (48 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, Jan Kara

From: Nathan Chancellor <natechancellor@gmail.com>

commit d9e9866803f7b6c3fdd35d345e97fb0b2908bbbc upstream.

Clang warns:

../fs/ext2/super.c:1076:3: warning: misleading indentation; statement is
not part of the previous 'if' [-Wmisleading-indentation]
        sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
        ^
../fs/ext2/super.c:1074:2: note: previous statement is here
        if (EXT2_BLOCKS_PER_GROUP(sb) == 0)
        ^
1 warning generated.

This warning occurs because there is a space before the tab on this
line. Remove it so that the indentation is consistent with the Linux
kernel coding style and clang no longer warns.

Fixes: 41f04d852e35 ("[PATCH] ext2: fix mounts at 16T")
Link: https://github.com/ClangBuiltLinux/linux/issues/827
Link: https://lore.kernel.org/r/20191218031930.31393-1-natechancellor@gmail.com
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/ext2/super.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1093,9 +1093,9 @@ static int ext2_fill_super(struct super_
 
 	if (EXT2_BLOCKS_PER_GROUP(sb) == 0)
 		goto cantfind_ext2;
- 	sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
- 				le32_to_cpu(es->s_first_data_block) - 1)
- 					/ EXT2_BLOCKS_PER_GROUP(sb)) + 1;
+	sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
+				le32_to_cpu(es->s_first_data_block) - 1)
+					/ EXT2_BLOCKS_PER_GROUP(sb)) + 1;
 	db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) /
 		   EXT2_DESC_PER_BLOCK(sb);
 	sbi->s_group_desc = kmalloc_array (db_count,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 151/195] powerpc/44x: Adjust indentation in ibm4xx_denali_fixup_memsize
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (149 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 150/195] ext2: Adjust indentation in ext2_fill_super Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 152/195] drm: msm: mdp4: Adjust indentation in mdp4_dsi_encoder_enable Greg Kroah-Hartman
                   ` (47 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, Nick Desaulniers,
	Michael Ellerman

From: Nathan Chancellor <natechancellor@gmail.com>

commit c3aae14e5d468d18dbb5d7c0c8c7e2968cc14aad upstream.

Clang warns:

../arch/powerpc/boot/4xx.c:231:3: warning: misleading indentation;
statement is not part of the previous 'else' [-Wmisleading-indentation]
        val = SDRAM0_READ(DDR0_42);
        ^
../arch/powerpc/boot/4xx.c:227:2: note: previous statement is here
        else
        ^

This is because there is a space at the beginning of this line; remove
it so that the indentation is consistent according to the Linux kernel
coding style and clang no longer warns.

Fixes: d23f5099297c ("[POWERPC] 4xx: Adds decoding of 440SPE memory size to boot wrapper library")
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://github.com/ClangBuiltLinux/linux/issues/780
Link: https://lore.kernel.org/r/20191209200338.12546-1-natechancellor@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/boot/4xx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/boot/4xx.c
+++ b/arch/powerpc/boot/4xx.c
@@ -232,7 +232,7 @@ void ibm4xx_denali_fixup_memsize(void)
 		dpath = 8; /* 64 bits */
 
 	/* get address pins (rows) */
- 	val = SDRAM0_READ(DDR0_42);
+	val = SDRAM0_READ(DDR0_42);
 
 	row = DDR_GET_VAL(val, DDR_APIN, DDR_APIN_SHIFT);
 	if (row > max_row)



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 152/195] drm: msm: mdp4: Adjust indentation in mdp4_dsi_encoder_enable
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (150 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 151/195] powerpc/44x: Adjust indentation in ibm4xx_denali_fixup_memsize Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 153/195] NFC: pn544: Adjust indentation in pn544_hci_check_presence Greg Kroah-Hartman
                   ` (46 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, Nick Desaulniers,
	Rob Clark

From: Nathan Chancellor <natechancellor@gmail.com>

commit 251e3cb1418ff3f5061ee31335e346e852b16573 upstream.

Clang warns:

../drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c:124:3: warning:
misleading indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
         mdp4_crtc_set_config(encoder->crtc,
         ^
../drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c:121:2: note:
previous statement is here
        if (mdp4_dsi_encoder->enabled)
        ^

This warning occurs because there is a space after the tab on this line.
Remove it so that the indentation is consistent with the Linux kernel
coding style and clang no longer warns.

Fixes: 776638e73a19 ("drm/msm/dsi: Add a mdp4 encoder for DSI")
Link: https://github.com/ClangBuiltLinux/linux/issues/792
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_dsi_encoder.c
@@ -139,7 +139,7 @@ static void mdp4_dsi_encoder_enable(stru
 	if (mdp4_dsi_encoder->enabled)
 		return;
 
-	 mdp4_crtc_set_config(encoder->crtc,
+	mdp4_crtc_set_config(encoder->crtc,
 			MDP4_DMA_CONFIG_PACK_ALIGN_MSB |
 			MDP4_DMA_CONFIG_DEFLKR_EN |
 			MDP4_DMA_CONFIG_DITHER_EN |



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 153/195] NFC: pn544: Adjust indentation in pn544_hci_check_presence
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (151 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 152/195] drm: msm: mdp4: Adjust indentation in mdp4_dsi_encoder_enable Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 154/195] ppp: Adjust indentation into ppp_async_input Greg Kroah-Hartman
                   ` (45 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, David S. Miller

From: Nathan Chancellor <natechancellor@gmail.com>

commit 5080832627b65e3772a35d1dced68c64e2b24442 upstream.

Clang warns

../drivers/nfc/pn544/pn544.c:696:4: warning: misleading indentation;
statement is not part of the previous 'if' [-Wmisleading-indentation]
                 return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
                 ^
../drivers/nfc/pn544/pn544.c:692:3: note: previous statement is here
                if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
                ^
1 warning generated.

This warning occurs because there is a space after the tab on this line.
Remove it so that the indentation is consistent with the Linux kernel
coding style and clang no longer warns.

Fixes: da052850b911 ("NFC: Add pn544 presence check for different targets")
Link: https://github.com/ClangBuiltLinux/linux/issues/814
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/nfc/pn544/pn544.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/nfc/pn544/pn544.c
+++ b/drivers/nfc/pn544/pn544.c
@@ -704,7 +704,7 @@ static int pn544_hci_check_presence(stru
 		    target->nfcid1_len != 10)
 			return -EOPNOTSUPP;
 
-		 return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
+		return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
 				     PN544_RF_READER_CMD_ACTIVATE_NEXT,
 				     target->nfcid1, target->nfcid1_len, NULL);
 	} else if (target->supported_protocols & (NFC_PROTO_JEWEL_MASK |



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 154/195] ppp: Adjust indentation into ppp_async_input
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (152 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 153/195] NFC: pn544: Adjust indentation in pn544_hci_check_presence Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 155/195] net: smc911x: Adjust indentation in smc911x_phy_configure Greg Kroah-Hartman
                   ` (44 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, David S. Miller

From: Nathan Chancellor <natechancellor@gmail.com>

commit 08cbc75f96029d3092664213a844a5e25523aa35 upstream.

Clang warns:

../drivers/net/ppp/ppp_async.c:877:6: warning: misleading indentation;
statement is not part of the previous 'if' [-Wmisleading-indentation]
                                ap->rpkt = skb;
                                ^
../drivers/net/ppp/ppp_async.c:875:5: note: previous statement is here
                                if (!skb)
                                ^
1 warning generated.

This warning occurs because there is a space before the tab on this
line. Clean up this entire block's indentation so that it is consistent
with the Linux kernel coding style and clang no longer warns.

Fixes: 6722e78c9005 ("[PPP]: handle misaligned accesses")
Link: https://github.com/ClangBuiltLinux/linux/issues/800
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/ppp/ppp_async.c |   18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

--- a/drivers/net/ppp/ppp_async.c
+++ b/drivers/net/ppp/ppp_async.c
@@ -878,15 +878,15 @@ ppp_async_input(struct asyncppp *ap, con
 				skb = dev_alloc_skb(ap->mru + PPP_HDRLEN + 2);
 				if (!skb)
 					goto nomem;
- 				ap->rpkt = skb;
- 			}
- 			if (skb->len == 0) {
- 				/* Try to get the payload 4-byte aligned.
- 				 * This should match the
- 				 * PPP_ALLSTATIONS/PPP_UI/compressed tests in
- 				 * process_input_packet, but we do not have
- 				 * enough chars here to test buf[1] and buf[2].
- 				 */
+				ap->rpkt = skb;
+			}
+			if (skb->len == 0) {
+				/* Try to get the payload 4-byte aligned.
+				 * This should match the
+				 * PPP_ALLSTATIONS/PPP_UI/compressed tests in
+				 * process_input_packet, but we do not have
+				 * enough chars here to test buf[1] and buf[2].
+				 */
 				if (buf[0] != PPP_ALLSTATIONS)
 					skb_reserve(skb, 2 + (buf[0] & 1));
 			}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 155/195] net: smc911x: Adjust indentation in smc911x_phy_configure
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (153 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 154/195] ppp: Adjust indentation into ppp_async_input Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 156/195] net: tulip: Adjust indentation in {dmfe, uli526x}_init_module Greg Kroah-Hartman
                   ` (43 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, David S. Miller

From: Nathan Chancellor <natechancellor@gmail.com>

commit 5c61e223004b3b5c3f1dd25718e979bc17a3b12d upstream.

Clang warns:

../drivers/net/ethernet/smsc/smc911x.c:939:3: warning: misleading
indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
         if (!lp->ctl_rfduplx)
         ^
../drivers/net/ethernet/smsc/smc911x.c:936:2: note: previous statement
is here
        if (lp->ctl_rspeed != 100)
        ^
1 warning generated.

This warning occurs because there is a space after the tab on this line.
Remove it so that the indentation is consistent with the Linux kernel
coding style and clang no longer warns.

Fixes: 0a0c72c9118c ("[PATCH] RE: [PATCH 1/1] net driver: Add support for SMSC LAN911x line of ethernet chips")
Link: https://github.com/ClangBuiltLinux/linux/issues/796
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/ethernet/smsc/smc911x.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/smsc/smc911x.c
+++ b/drivers/net/ethernet/smsc/smc911x.c
@@ -947,7 +947,7 @@ static void smc911x_phy_configure(struct
 	if (lp->ctl_rspeed != 100)
 		my_ad_caps &= ~(ADVERTISE_100BASE4|ADVERTISE_100FULL|ADVERTISE_100HALF);
 
-	 if (!lp->ctl_rfduplx)
+	if (!lp->ctl_rfduplx)
 		my_ad_caps &= ~(ADVERTISE_100FULL|ADVERTISE_10FULL);
 
 	/* Update our Auto-Neg Advertisement Register */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 156/195] net: tulip: Adjust indentation in {dmfe, uli526x}_init_module
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (154 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 155/195] net: smc911x: Adjust indentation in smc911x_phy_configure Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 157/195] IB/mlx5: Fix outstanding_pi index for GSI qps Greg Kroah-Hartman
                   ` (42 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Nathan Chancellor, David S. Miller

From: Nathan Chancellor <natechancellor@gmail.com>

commit fe06bf3d83ef0d92f35a24e03297172e92ce9ce3 upstream.

Clang warns:

../drivers/net/ethernet/dec/tulip/uli526x.c:1812:3: warning: misleading
indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
        switch (mode) {
        ^
../drivers/net/ethernet/dec/tulip/uli526x.c:1809:2: note: previous
statement is here
        if (cr6set)
        ^
1 warning generated.

../drivers/net/ethernet/dec/tulip/dmfe.c:2217:3: warning: misleading
indentation; statement is not part of the previous 'if'
[-Wmisleading-indentation]
        switch(mode) {
        ^
../drivers/net/ethernet/dec/tulip/dmfe.c:2214:2: note: previous
statement is here
        if (cr6set)
        ^
1 warning generated.

This warning occurs because there is a space before the tab on these
lines. Remove them so that the indentation is consistent with the Linux
kernel coding style and clang no longer warns.

While we are here, adjust the default block in dmfe_init_module to have
a proper break between the label and assignment and add a space between
the switch and opening parentheses to avoid a checkpatch warning.

Fixes: e1c3e5014040 ("[PATCH] initialisation cleanup for ULI526x-net-driver")
Link: https://github.com/ClangBuiltLinux/linux/issues/795
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/ethernet/dec/tulip/dmfe.c    |    7 ++++---
 drivers/net/ethernet/dec/tulip/uli526x.c |    4 ++--
 2 files changed, 6 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/dec/tulip/dmfe.c
+++ b/drivers/net/ethernet/dec/tulip/dmfe.c
@@ -2222,15 +2222,16 @@ static int __init dmfe_init_module(void)
 	if (cr6set)
 		dmfe_cr6_user_set = cr6set;
 
- 	switch(mode) {
-   	case DMFE_10MHF:
+	switch (mode) {
+	case DMFE_10MHF:
 	case DMFE_100MHF:
 	case DMFE_10MFD:
 	case DMFE_100MFD:
 	case DMFE_1M_HPNA:
 		dmfe_media_mode = mode;
 		break;
-	default:dmfe_media_mode = DMFE_AUTO;
+	default:
+		dmfe_media_mode = DMFE_AUTO;
 		break;
 	}
 
--- a/drivers/net/ethernet/dec/tulip/uli526x.c
+++ b/drivers/net/ethernet/dec/tulip/uli526x.c
@@ -1817,8 +1817,8 @@ static int __init uli526x_init_module(vo
 	if (cr6set)
 		uli526x_cr6_user_set = cr6set;
 
- 	switch (mode) {
-   	case ULI526X_10MHF:
+	switch (mode) {
+	case ULI526X_10MHF:
 	case ULI526X_100MHF:
 	case ULI526X_10MFD:
 	case ULI526X_100MFD:



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 157/195] IB/mlx5: Fix outstanding_pi index for GSI qps
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (155 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 156/195] net: tulip: Adjust indentation in {dmfe, uli526x}_init_module Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 158/195] IB/core: Fix ODP get user pages flow Greg Kroah-Hartman
                   ` (41 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Prabhath Sajeepa, Leon Romanovsky,
	Jason Gunthorpe

From: Prabhath Sajeepa <psajeepa@purestorage.com>

commit b5671afe5e39ed71e94eae788bacdcceec69db09 upstream.

Commit b0ffeb537f3a ("IB/mlx5: Fix iteration overrun in GSI qps") changed
the way outstanding WRs are tracked for the GSI QP. But the fix did not
cover the case when a call to ib_post_send() fails and updates index to
track outstanding.

Since the prior commmit outstanding_pi should not be bounded otherwise the
loop generate_completions() will fail.

Fixes: b0ffeb537f3a ("IB/mlx5: Fix iteration overrun in GSI qps")
Link: https://lore.kernel.org/r/1576195889-23527-1-git-send-email-psajeepa@purestorage.com
Signed-off-by: Prabhath Sajeepa <psajeepa@purestorage.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/hw/mlx5/gsi.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/infiniband/hw/mlx5/gsi.c
+++ b/drivers/infiniband/hw/mlx5/gsi.c
@@ -507,8 +507,7 @@ int mlx5_ib_gsi_post_send(struct ib_qp *
 		ret = ib_post_send(tx_qp, &cur_wr.wr, bad_wr);
 		if (ret) {
 			/* Undo the effect of adding the outstanding wr */
-			gsi->outstanding_pi = (gsi->outstanding_pi - 1) %
-					      gsi->cap.max_send_wr;
+			gsi->outstanding_pi--;
 			goto err;
 		}
 		spin_unlock_irqrestore(&gsi->lock, flags);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 158/195] IB/core: Fix ODP get user pages flow
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (156 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 157/195] IB/mlx5: Fix outstanding_pi index for GSI qps Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 159/195] nfsd: fix delay timer on 32-bit architectures Greg Kroah-Hartman
                   ` (40 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Yishai Hadas, Artemy Kovalyov,
	Jason Gunthorpe, Leon Romanovsky

From: Yishai Hadas <yishaih@mellanox.com>

commit d07de8bd1709a80a282963ad7b2535148678a9e4 upstream.

The nr_pages argument of get_user_pages_remote() should always be in terms
of the system page size, not the MR page size. Use PAGE_SIZE instead of
umem_odp->page_shift.

Fixes: 403cd12e2cf7 ("IB/umem: Add contiguous ODP support")
Link: https://lore.kernel.org/r/20191222124649.52300-3-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Reviewed-by: Artemy Kovalyov <artemyko@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/core/umem_odp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/core/umem_odp.c
+++ b/drivers/infiniband/core/umem_odp.c
@@ -689,7 +689,7 @@ int ib_umem_odp_map_dma_pages(struct ib_
 
 	while (bcnt > 0) {
 		const size_t gup_num_pages = min_t(size_t,
-				(bcnt + BIT(page_shift) - 1) >> page_shift,
+				ALIGN(bcnt, PAGE_SIZE) / PAGE_SIZE,
 				PAGE_SIZE / sizeof(struct page *));
 
 		down_read(&owning_mm->mmap_sem);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 159/195] nfsd: fix delay timer on 32-bit architectures
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (157 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 158/195] IB/core: Fix ODP get user pages flow Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 160/195] nfsd: fix jiffies/time_t mixup in LRU list Greg Kroah-Hartman
                   ` (39 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Arnd Bergmann, J. Bruce Fields

From: Arnd Bergmann <arnd@arndb.de>

commit 2561c92b12f4f4e386d453556685f75775c0938b upstream.

The nfsd4_cb_layout_done() function takes a 'time_t' value,
multiplied by NSEC_PER_SEC*2 to get a nanosecond value.

This works fine on 64-bit architectures, but on 32-bit, any
value over 1 second results in a signed integer overflow
with unexpected results.

Cast one input to a 64-bit type in order to produce the
same result that we have on 64-bit architectures, regarless
of the type of nfsd4_lease.

Fixes: 6b9b21073d3b ("nfsd: give up on CB_LAYOUTRECALLs after two lease periods")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfsd/nfs4layouts.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -676,7 +676,7 @@ nfsd4_cb_layout_done(struct nfsd4_callba
 
 		/* Client gets 2 lease periods to return it */
 		cutoff = ktime_add_ns(task->tk_start,
-					 nn->nfsd4_lease * NSEC_PER_SEC * 2);
+					 (u64)nn->nfsd4_lease * NSEC_PER_SEC * 2);
 
 		if (ktime_before(now, cutoff)) {
 			rpc_delay(task, HZ/100); /* 10 mili-seconds */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 160/195] nfsd: fix jiffies/time_t mixup in LRU list
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (158 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 159/195] nfsd: fix delay timer on 32-bit architectures Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 161/195] nfsd: Return the correct number of bytes written to the file Greg Kroah-Hartman
                   ` (38 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Arnd Bergmann, J. Bruce Fields

From: Arnd Bergmann <arnd@arndb.de>

commit 9594497f2c78993cb66b696122f7c65528ace985 upstream.

The nfsd4_blocked_lock->nbl_time timestamp is recorded in jiffies,
but then compared to a CLOCK_REALTIME timestamp later on, which makes
no sense.

For consistency with the other timestamps, change this to use a time_t.

This is a change in behavior, which may cause regressions, but the
current code is not sensible. On a system with CONFIG_HZ=1000,
the 'time_after((unsigned long)nbl->nbl_time, (unsigned long)cutoff))'
check is false for roughly the first 18 days of uptime and then true
for the next 49 days.

Fixes: 7919d0a27f1e ("nfsd: add a LRU list for blocked locks")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfsd/nfs4state.c |    2 +-
 fs/nfsd/state.h     |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -6075,7 +6075,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struc
 	}
 
 	if (fl_flags & FL_SLEEP) {
-		nbl->nbl_time = jiffies;
+		nbl->nbl_time = get_seconds();
 		spin_lock(&nn->blocked_locks_lock);
 		list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked);
 		list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru);
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -592,7 +592,7 @@ static inline bool nfsd4_stateid_generat
 struct nfsd4_blocked_lock {
 	struct list_head	nbl_list;
 	struct list_head	nbl_lru;
-	unsigned long		nbl_time;
+	time_t			nbl_time;
 	struct file_lock	nbl_lock;
 	struct knfsd_fh		nbl_fh;
 	struct nfsd4_callback	nbl_cb;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 161/195] nfsd: Return the correct number of bytes written to the file
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (159 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 160/195] nfsd: fix jiffies/time_t mixup in LRU list Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 162/195] ubi: fastmap: Fix inverted logic in seen selfcheck Greg Kroah-Hartman
                   ` (37 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Trond Myklebust, J. Bruce Fields

From: Trond Myklebust <trondmy@gmail.com>

commit 09a80f2aef06b7c86143f5c14efd3485e0d2c139 upstream.

We must allow for the fact that iov_iter_write() could have returned
a short write (e.g. if there was an ENOSPC issue).

Fixes: d890be159a71 "nfsd: Add I/O trace points in the NFSv4 write path"
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/nfsd/vfs.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1016,6 +1016,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, s
 	host_err = vfs_iter_write(file, &iter, &pos, flags);
 	if (host_err < 0)
 		goto out_nfserr;
+	*cnt = host_err;
 	nfsdstats.io_write += *cnt;
 	fsnotify_modify(file);
 



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 162/195] ubi: fastmap: Fix inverted logic in seen selfcheck
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (160 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 161/195] nfsd: Return the correct number of bytes written to the file Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 163/195] ubi: Fix an error pointer dereference in error handling code Greg Kroah-Hartman
                   ` (36 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Sascha Hauer, Richard Weinberger

From: Sascha Hauer <s.hauer@pengutronix.de>

commit ef5aafb6e4e9942a28cd300bdcda21ce6cbaf045 upstream.

set_seen() sets the bit corresponding to the PEB number in the bitmap,
so when self_check_seen() wants to find PEBs that haven't been seen we
have to print the PEBs that have their bit cleared, not the ones which
have it set.

Fixes: 5d71afb00840 ("ubi: Use bitmaps in Fastmap self-check code")
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mtd/ubi/fastmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -73,7 +73,7 @@ static int self_check_seen(struct ubi_de
 		return 0;
 
 	for (pnum = 0; pnum < ubi->peb_count; pnum++) {
-		if (test_bit(pnum, seen) && ubi->lookuptbl[pnum]) {
+		if (!test_bit(pnum, seen) && ubi->lookuptbl[pnum]) {
 			ubi_err(ubi, "self-check failed for PEB %d, fastmap didn't see it", pnum);
 			ret = -EINVAL;
 		}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 163/195] ubi: Fix an error pointer dereference in error handling code
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (161 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 162/195] ubi: fastmap: Fix inverted logic in seen selfcheck Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 164/195] mfd: da9062: Fix watchdog compatible string Greg Kroah-Hartman
                   ` (35 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Dan Carpenter, Richard Weinberger

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 5d3805af279c93ef49a64701f35254676d709622 upstream.

If "seen_pebs = init_seen(ubi);" fails then "seen_pebs" is an error pointer
and we try to kfree() it which results in an Oops.

This patch re-arranges the error handling so now it only frees things
which have been allocated successfully.

Fixes: daef3dd1f0ae ("UBI: Fastmap: Add self check to detect absent PEBs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mtd/ubi/fastmap.c |   21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -1146,7 +1146,7 @@ static int ubi_write_fastmap(struct ubi_
 	struct rb_node *tmp_rb;
 	int ret, i, j, free_peb_count, used_peb_count, vol_count;
 	int scrub_peb_count, erase_peb_count;
-	unsigned long *seen_pebs = NULL;
+	unsigned long *seen_pebs;
 
 	fm_raw = ubi->fm_buf;
 	memset(ubi->fm_buf, 0, ubi->fm_size);
@@ -1160,7 +1160,7 @@ static int ubi_write_fastmap(struct ubi_
 	dvbuf = new_fm_vbuf(ubi, UBI_FM_DATA_VOLUME_ID);
 	if (!dvbuf) {
 		ret = -ENOMEM;
-		goto out_kfree;
+		goto out_free_avbuf;
 	}
 
 	avhdr = ubi_get_vid_hdr(avbuf);
@@ -1169,7 +1169,7 @@ static int ubi_write_fastmap(struct ubi_
 	seen_pebs = init_seen(ubi);
 	if (IS_ERR(seen_pebs)) {
 		ret = PTR_ERR(seen_pebs);
-		goto out_kfree;
+		goto out_free_dvbuf;
 	}
 
 	spin_lock(&ubi->volumes_lock);
@@ -1337,7 +1337,7 @@ static int ubi_write_fastmap(struct ubi_
 	ret = ubi_io_write_vid_hdr(ubi, new_fm->e[0]->pnum, avbuf);
 	if (ret) {
 		ubi_err(ubi, "unable to write vid_hdr to fastmap SB!");
-		goto out_kfree;
+		goto out_free_seen;
 	}
 
 	for (i = 0; i < new_fm->used_blocks; i++) {
@@ -1359,7 +1359,7 @@ static int ubi_write_fastmap(struct ubi_
 		if (ret) {
 			ubi_err(ubi, "unable to write vid_hdr to PEB %i!",
 				new_fm->e[i]->pnum);
-			goto out_kfree;
+			goto out_free_seen;
 		}
 	}
 
@@ -1369,7 +1369,7 @@ static int ubi_write_fastmap(struct ubi_
 		if (ret) {
 			ubi_err(ubi, "unable to write fastmap to PEB %i!",
 				new_fm->e[i]->pnum);
-			goto out_kfree;
+			goto out_free_seen;
 		}
 	}
 
@@ -1379,10 +1379,13 @@ static int ubi_write_fastmap(struct ubi_
 	ret = self_check_seen(ubi, seen_pebs);
 	dbg_bld("fastmap written!");
 
-out_kfree:
-	ubi_free_vid_buf(avbuf);
-	ubi_free_vid_buf(dvbuf);
+out_free_seen:
 	free_seen(seen_pebs);
+out_free_dvbuf:
+	ubi_free_vid_buf(dvbuf);
+out_free_avbuf:
+	ubi_free_vid_buf(avbuf);
+
 out:
 	return ret;
 }



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 164/195] mfd: da9062: Fix watchdog compatible string
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (162 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 163/195] ubi: Fix an error pointer dereference in error handling code Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 165/195] mfd: rn5t618: Mark ADC control register volatile Greg Kroah-Hartman
                   ` (34 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Marco Felsch, Guenter Roeck,
	Adam Thomson, Lee Jones

From: Marco Felsch <m.felsch@pengutronix.de>

commit 1112ba02ff1190ca9c15a912f9269e54b46d2d82 upstream.

The watchdog driver compatible is "dlg,da9062-watchdog" and not
"dlg,da9062-wdt". Therefore the mfd-core can't populate the of_node and
fwnode. As result the watchdog driver can't parse the devicetree.

Fixes: 9b40b030c4ad ("mfd: da9062: Supply core driver")
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mfd/da9062-core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mfd/da9062-core.c
+++ b/drivers/mfd/da9062-core.c
@@ -257,7 +257,7 @@ static const struct mfd_cell da9062_devs
 		.name		= "da9062-watchdog",
 		.num_resources	= ARRAY_SIZE(da9062_wdt_resources),
 		.resources	= da9062_wdt_resources,
-		.of_compatible  = "dlg,da9062-wdt",
+		.of_compatible  = "dlg,da9062-watchdog",
 	},
 	{
 		.name		= "da9062-thermal",



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 165/195] mfd: rn5t618: Mark ADC control register volatile
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (163 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 164/195] mfd: da9062: Fix watchdog compatible string Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 166/195] bonding/alb: properly access headers in bond_alb_xmit() Greg Kroah-Hartman
                   ` (33 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Andreas Kemnade, Lee Jones

From: Andreas Kemnade <andreas@kemnade.info>

commit 2f3dc25c0118de03a00ddc88b61f7216854f534d upstream.

There is a bit which gets cleared after conversion.

Fixes: 9bb9e29c78f8 ("mfd: Add Ricoh RN5T618 PMIC core driver")
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mfd/rn5t618.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/mfd/rn5t618.c
+++ b/drivers/mfd/rn5t618.c
@@ -32,6 +32,7 @@ static bool rn5t618_volatile_reg(struct
 	case RN5T618_WATCHDOGCNT:
 	case RN5T618_DCIRQ:
 	case RN5T618_ILIMDATAH ... RN5T618_AIN0DATAL:
+	case RN5T618_ADCCNT3:
 	case RN5T618_IR_ADC1 ... RN5T618_IR_ADC3:
 	case RN5T618_IR_GPR:
 	case RN5T618_IR_GPF:



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 166/195] bonding/alb: properly access headers in bond_alb_xmit()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (164 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 165/195] mfd: rn5t618: Mark ADC control register volatile Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 167/195] net: dsa: bcm_sf2: Only 7278 supports 2Gb/sec IMP port Greg Kroah-Hartman
                   ` (32 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Dumazet, syzbot, Jay Vosburgh,
	Veaceslav Falico, Andy Gospodarek, David S. Miller

From: Eric Dumazet <edumazet@google.com>

[ Upstream commit 38f88c45404293bbc027b956def6c10cbd45c616 ]

syzbot managed to send an IPX packet through bond_alb_xmit()
and af_packet and triggered a use-after-free.

First, bond_alb_xmit() was using ipx_hdr() helper to reach
the IPX header, but ipx_hdr() was using the transport offset
instead of the network offset. In the particular syzbot
report transport offset was 0xFFFF

This patch removes ipx_hdr() since it was only (mis)used from bonding.

Then we need to make sure IPv4/IPv6/IPX headers are pulled
in skb->head before dereferencing anything.

BUG: KASAN: use-after-free in bond_alb_xmit+0x153a/0x1590 drivers/net/bonding/bond_alb.c:1452
Read of size 2 at addr ffff8801ce56dfff by task syz-executor.2/18108
 (if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) ...)

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 [<ffffffff8441fc42>] __dump_stack lib/dump_stack.c:17 [inline]
 [<ffffffff8441fc42>] dump_stack+0x14d/0x20b lib/dump_stack.c:53
 [<ffffffff81a7dec4>] print_address_description+0x6f/0x20b mm/kasan/report.c:282
 [<ffffffff81a7e0ec>] kasan_report_error mm/kasan/report.c:380 [inline]
 [<ffffffff81a7e0ec>] kasan_report mm/kasan/report.c:438 [inline]
 [<ffffffff81a7e0ec>] kasan_report.cold+0x8c/0x2a0 mm/kasan/report.c:422
 [<ffffffff81a7dc4f>] __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:469
 [<ffffffff82c8c00a>] bond_alb_xmit+0x153a/0x1590 drivers/net/bonding/bond_alb.c:1452
 [<ffffffff82c60c74>] __bond_start_xmit drivers/net/bonding/bond_main.c:4199 [inline]
 [<ffffffff82c60c74>] bond_start_xmit+0x4f4/0x1570 drivers/net/bonding/bond_main.c:4224
 [<ffffffff83baa558>] __netdev_start_xmit include/linux/netdevice.h:4525 [inline]
 [<ffffffff83baa558>] netdev_start_xmit include/linux/netdevice.h:4539 [inline]
 [<ffffffff83baa558>] xmit_one net/core/dev.c:3611 [inline]
 [<ffffffff83baa558>] dev_hard_start_xmit+0x168/0x910 net/core/dev.c:3627
 [<ffffffff83bacf35>] __dev_queue_xmit+0x1f55/0x33b0 net/core/dev.c:4238
 [<ffffffff83bae3a8>] dev_queue_xmit+0x18/0x20 net/core/dev.c:4278
 [<ffffffff84339189>] packet_snd net/packet/af_packet.c:3226 [inline]
 [<ffffffff84339189>] packet_sendmsg+0x4919/0x70b0 net/packet/af_packet.c:3252
 [<ffffffff83b1ac0c>] sock_sendmsg_nosec net/socket.c:673 [inline]
 [<ffffffff83b1ac0c>] sock_sendmsg+0x12c/0x160 net/socket.c:684
 [<ffffffff83b1f5a2>] __sys_sendto+0x262/0x380 net/socket.c:1996
 [<ffffffff83b1f700>] SYSC_sendto net/socket.c:2008 [inline]
 [<ffffffff83b1f700>] SyS_sendto+0x40/0x60 net/socket.c:2004

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/bonding/bond_alb.c |   44 +++++++++++++++++++++++++++++------------
 include/net/ipx.h              |    5 ----
 2 files changed, 32 insertions(+), 17 deletions(-)

--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -1399,26 +1399,31 @@ netdev_tx_t bond_alb_xmit(struct sk_buff
 	bool do_tx_balance = true;
 	u32 hash_index = 0;
 	const u8 *hash_start = NULL;
-	struct ipv6hdr *ip6hdr;
 
 	skb_reset_mac_header(skb);
 	eth_data = eth_hdr(skb);
 
 	switch (ntohs(skb->protocol)) {
 	case ETH_P_IP: {
-		const struct iphdr *iph = ip_hdr(skb);
+		const struct iphdr *iph;
 
 		if (is_broadcast_ether_addr(eth_data->h_dest) ||
-		    iph->daddr == ip_bcast ||
-		    iph->protocol == IPPROTO_IGMP) {
+		    !pskb_network_may_pull(skb, sizeof(*iph))) {
+			do_tx_balance = false;
+			break;
+		}
+		iph = ip_hdr(skb);
+		if (iph->daddr == ip_bcast || iph->protocol == IPPROTO_IGMP) {
 			do_tx_balance = false;
 			break;
 		}
 		hash_start = (char *)&(iph->daddr);
 		hash_size = sizeof(iph->daddr);
-	}
 		break;
-	case ETH_P_IPV6:
+	}
+	case ETH_P_IPV6: {
+		const struct ipv6hdr *ip6hdr;
+
 		/* IPv6 doesn't really use broadcast mac address, but leave
 		 * that here just in case.
 		 */
@@ -1435,7 +1440,11 @@ netdev_tx_t bond_alb_xmit(struct sk_buff
 			break;
 		}
 
-		/* Additianally, DAD probes should not be tx-balanced as that
+		if (!pskb_network_may_pull(skb, sizeof(*ip6hdr))) {
+			do_tx_balance = false;
+			break;
+		}
+		/* Additionally, DAD probes should not be tx-balanced as that
 		 * will lead to false positives for duplicate addresses and
 		 * prevent address configuration from working.
 		 */
@@ -1445,17 +1454,26 @@ netdev_tx_t bond_alb_xmit(struct sk_buff
 			break;
 		}
 
-		hash_start = (char *)&(ipv6_hdr(skb)->daddr);
-		hash_size = sizeof(ipv6_hdr(skb)->daddr);
+		hash_start = (char *)&ip6hdr->daddr;
+		hash_size = sizeof(ip6hdr->daddr);
 		break;
-	case ETH_P_IPX:
-		if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) {
+	}
+	case ETH_P_IPX: {
+		const struct ipxhdr *ipxhdr;
+
+		if (pskb_network_may_pull(skb, sizeof(*ipxhdr))) {
+			do_tx_balance = false;
+			break;
+		}
+		ipxhdr = (struct ipxhdr *)skb_network_header(skb);
+
+		if (ipxhdr->ipx_checksum != IPX_NO_CHECKSUM) {
 			/* something is wrong with this packet */
 			do_tx_balance = false;
 			break;
 		}
 
-		if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) {
+		if (ipxhdr->ipx_type != IPX_TYPE_NCP) {
 			/* The only protocol worth balancing in
 			 * this family since it has an "ARP" like
 			 * mechanism
@@ -1464,9 +1482,11 @@ netdev_tx_t bond_alb_xmit(struct sk_buff
 			break;
 		}
 
+		eth_data = eth_hdr(skb);
 		hash_start = (char *)eth_data->h_dest;
 		hash_size = ETH_ALEN;
 		break;
+	}
 	case ETH_P_ARP:
 		do_tx_balance = false;
 		if (bond_info->rlb_enabled)
--- a/include/net/ipx.h
+++ b/include/net/ipx.h
@@ -47,11 +47,6 @@ struct ipxhdr {
 /* From af_ipx.c */
 extern int sysctl_ipx_pprop_broadcasting;
 
-static __inline__ struct ipxhdr *ipx_hdr(struct sk_buff *skb)
-{
-	return (struct ipxhdr *)skb_transport_header(skb);
-}
-
 struct ipx_interface {
 	/* IPX address */
 	__be32			if_netnum;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 167/195] net: dsa: bcm_sf2: Only 7278 supports 2Gb/sec IMP port
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (165 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 166/195] bonding/alb: properly access headers in bond_alb_xmit() Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 168/195] net: mvneta: move rx_dropped and rx_errors in per-cpu stats Greg Kroah-Hartman
                   ` (31 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Florian Fainelli, David S. Miller

From: Florian Fainelli <f.fainelli@gmail.com>

[ Upstream commit de34d7084edd069dac5aa010cfe32bd8c4619fa6 ]

The 7445 switch clocking profiles do not allow us to run the IMP port at
2Gb/sec in a way that it is reliable and consistent. Make sure that the
setting is only applied to the 7278 family.

Fixes: 8f1880cbe8d0 ("net: dsa: bcm_sf2: Configure IMP port for 2Gb/sec")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/dsa/bcm_sf2.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -72,7 +72,9 @@ static void bcm_sf2_imp_setup(struct dsa
 
 		/* Force link status for IMP port */
 		reg = core_readl(priv, offset);
-		reg |= (MII_SW_OR | LINK_STS | GMII_SPEED_UP_2G);
+		reg |= (MII_SW_OR | LINK_STS);
+		if (priv->type == BCM7278_DEVICE_ID)
+			reg |= GMII_SPEED_UP_2G;
 		core_writel(priv, reg, offset);
 
 		/* Enable Broadcast, Multicast, Unicast forwarding to IMP port */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 168/195] net: mvneta: move rx_dropped and rx_errors in per-cpu stats
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (166 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 167/195] net: dsa: bcm_sf2: Only 7278 supports 2Gb/sec IMP port Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 169/195] net_sched: fix a resource leak in tcindex_set_parms() Greg Kroah-Hartman
                   ` (30 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Lorenzo Bianconi, David S. Miller

From: Lorenzo Bianconi <lorenzo@kernel.org>

[ Upstream commit c35947b8ff8acca33134ee39c31708233765c31a ]

Move rx_dropped and rx_errors counters in mvneta_pcpu_stats in order to
avoid possible races updating statistics

Fixes: 562e2f467e71 ("net: mvneta: Improve the buffer allocation method for SWBM")
Fixes: dc35a10f68d3 ("net: mvneta: bm: add support for hardware buffer management")
Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP network unit")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/marvell/mvneta.c |   27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -385,6 +385,8 @@ struct mvneta_pcpu_stats {
 	struct	u64_stats_sync syncp;
 	u64	rx_packets;
 	u64	rx_bytes;
+	u64	rx_dropped;
+	u64	rx_errors;
 	u64	tx_packets;
 	u64	tx_bytes;
 };
@@ -701,6 +703,8 @@ mvneta_get_stats64(struct net_device *de
 		struct mvneta_pcpu_stats *cpu_stats;
 		u64 rx_packets;
 		u64 rx_bytes;
+		u64 rx_dropped;
+		u64 rx_errors;
 		u64 tx_packets;
 		u64 tx_bytes;
 
@@ -709,19 +713,20 @@ mvneta_get_stats64(struct net_device *de
 			start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
 			rx_packets = cpu_stats->rx_packets;
 			rx_bytes   = cpu_stats->rx_bytes;
+			rx_dropped = cpu_stats->rx_dropped;
+			rx_errors  = cpu_stats->rx_errors;
 			tx_packets = cpu_stats->tx_packets;
 			tx_bytes   = cpu_stats->tx_bytes;
 		} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
 
 		stats->rx_packets += rx_packets;
 		stats->rx_bytes   += rx_bytes;
+		stats->rx_dropped += rx_dropped;
+		stats->rx_errors  += rx_errors;
 		stats->tx_packets += tx_packets;
 		stats->tx_bytes   += tx_bytes;
 	}
 
-	stats->rx_errors	= dev->stats.rx_errors;
-	stats->rx_dropped	= dev->stats.rx_dropped;
-
 	stats->tx_dropped	= dev->stats.tx_dropped;
 }
 
@@ -1698,8 +1703,14 @@ static u32 mvneta_txq_desc_csum(int l3_o
 static void mvneta_rx_error(struct mvneta_port *pp,
 			    struct mvneta_rx_desc *rx_desc)
 {
+	struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
 	u32 status = rx_desc->status;
 
+	/* update per-cpu counter */
+	u64_stats_update_begin(&stats->syncp);
+	stats->rx_errors++;
+	u64_stats_update_end(&stats->syncp);
+
 	switch (status & MVNETA_RXD_ERR_CODE_MASK) {
 	case MVNETA_RXD_ERR_CRC:
 		netdev_err(pp->dev, "bad rx status %08x (crc error), size=%d\n",
@@ -1960,7 +1971,6 @@ static int mvneta_rx_swbm(struct napi_st
 			/* Check errors only for FIRST descriptor */
 			if (rx_status & MVNETA_RXD_ERR_SUMMARY) {
 				mvneta_rx_error(pp, rx_desc);
-				dev->stats.rx_errors++;
 				/* leave the descriptor untouched */
 				continue;
 			}
@@ -1971,11 +1981,17 @@ static int mvneta_rx_swbm(struct napi_st
 			skb_size = max(rx_copybreak, rx_header_size);
 			rxq->skb = netdev_alloc_skb_ip_align(dev, skb_size);
 			if (unlikely(!rxq->skb)) {
+				struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
+
 				netdev_err(dev,
 					   "Can't allocate skb on queue %d\n",
 					   rxq->id);
-				dev->stats.rx_dropped++;
+
 				rxq->skb_alloc_err++;
+
+				u64_stats_update_begin(&stats->syncp);
+				stats->rx_dropped++;
+				u64_stats_update_end(&stats->syncp);
 				continue;
 			}
 			copy_size = min(skb_size, rx_bytes);
@@ -2135,7 +2151,6 @@ err_drop_frame_ret_pool:
 			mvneta_bm_pool_put_bp(pp->bm_priv, bm_pool,
 					      rx_desc->buf_phys_addr);
 err_drop_frame:
-			dev->stats.rx_errors++;
 			mvneta_rx_error(pp, rx_desc);
 			/* leave the descriptor untouched */
 			continue;



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 169/195] net_sched: fix a resource leak in tcindex_set_parms()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (167 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 168/195] net: mvneta: move rx_dropped and rx_errors in per-cpu stats Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 170/195] net: systemport: Avoid RBUF stuck in Wake-on-LAN mode Greg Kroah-Hartman
                   ` (29 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Jakub Kicinski, Jamal Hadi Salim,
	Jiri Pirko, Cong Wang, David S. Miller

From: Cong Wang <xiyou.wangcong@gmail.com>

[ Upstream commit 52b5ae501c045010aeeb1d5ac0373ff161a88291 ]

Jakub noticed there is a potential resource leak in
tcindex_set_parms(): when tcindex_filter_result_init() fails
and it jumps to 'errout1' which doesn't release the memory
and resources allocated by tcindex_alloc_perfect_hash().

We should just jump to 'errout_alloc' which calls
tcindex_free_perfect_hash().

Fixes: b9a24bb76bf6 ("net_sched: properly handle failure case of tcf_exts_init()")
Reported-by: Jakub Kicinski <kuba@kernel.org>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/cls_tcindex.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/net/sched/cls_tcindex.c
+++ b/net/sched/cls_tcindex.c
@@ -365,7 +365,7 @@ tcindex_set_parms(struct net *net, struc
 
 	err = tcindex_filter_result_init(&new_filter_result);
 	if (err < 0)
-		goto errout1;
+		goto errout_alloc;
 	if (old_r)
 		cr = r->res;
 
@@ -484,7 +484,6 @@ errout_alloc:
 		tcindex_free_perfect_hash(cp);
 	else if (balloc == 2)
 		kfree(cp->h);
-errout1:
 	tcf_exts_destroy(&new_filter_result.exts);
 errout:
 	kfree(cp);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 170/195] net: systemport: Avoid RBUF stuck in Wake-on-LAN mode
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (168 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 169/195] net_sched: fix a resource leak in tcindex_set_parms() Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 171/195] net/mlx5: IPsec, Fix esp modify function attribute Greg Kroah-Hartman
                   ` (28 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Florian Fainelli, David S. Miller

From: Florian Fainelli <f.fainelli@gmail.com>

[ Upstream commit 263a425a482fc495d6d3f9a29b9103a664c38b69 ]

After a number of suspend and resume cycles, it is possible for the RBUF
to be stuck in Wake-on-LAN mode, despite the MPD enable bit being
cleared which instructed the RBUF to exit that mode.

Avoid creating that problematic condition by clearing the RX_EN and
TX_EN bits in the UniMAC prior to disable the Magic Packet Detector
logic which is guaranteed to make the RBUF exit Wake-on-LAN mode.

Fixes: 83e82f4c706b ("net: systemport: add Wake-on-LAN support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/broadcom/bcmsysport.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -2716,6 +2716,9 @@ static int __maybe_unused bcm_sysport_re
 
 	umac_reset(priv);
 
+	/* Disable the UniMAC RX/TX */
+	umac_enable_set(priv, CMD_RX_EN | CMD_TX_EN, 0);
+
 	/* We may have been suspended and never received a WOL event that
 	 * would turn off MPD detection, take care of that now
 	 */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 171/195] net/mlx5: IPsec, Fix esp modify function attribute
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (169 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 170/195] net: systemport: Avoid RBUF stuck in Wake-on-LAN mode Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 172/195] net/mlx5: IPsec, fix memory leak at mlx5_fpga_ipsec_delete_sa_ctx Greg Kroah-Hartman
                   ` (27 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Raed Salem, Boris Pismenny, Saeed Mahameed

From: Raed Salem <raeds@mellanox.com>

[ Upstream commit 0dc2c534f17c05bed0622b37a744bc38b48ca88a ]

The function mlx5_fpga_esp_validate_xfrm_attrs is wrongly used
with negative negation as zero value indicates success but it
used as failure return value instead.

Fix by remove the unary not negation operator.

Fixes: 05564d0ae075 ("net/mlx5: Add flow-steering commands for FPGA IPSec implementation")
Signed-off-by: Raed Salem <raeds@mellanox.com>
Reviewed-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c
@@ -1472,7 +1472,7 @@ int mlx5_fpga_esp_modify_xfrm(struct mlx
 	if (!memcmp(&xfrm->attrs, attrs, sizeof(xfrm->attrs)))
 		return 0;
 
-	if (!mlx5_fpga_esp_validate_xfrm_attrs(mdev, attrs)) {
+	if (mlx5_fpga_esp_validate_xfrm_attrs(mdev, attrs)) {
 		mlx5_core_warn(mdev, "Tried to create an esp with unsupported attrs\n");
 		return -EOPNOTSUPP;
 	}



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 172/195] net/mlx5: IPsec, fix memory leak at mlx5_fpga_ipsec_delete_sa_ctx
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (170 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 171/195] net/mlx5: IPsec, Fix esp modify function attribute Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 173/195] net: macb: Remove unnecessary alignment check for TSO Greg Kroah-Hartman
                   ` (26 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Raed Salem, Boris Pismenny, Saeed Mahameed

From: Raed Salem <raeds@mellanox.com>

[ Upstream commit 08db2cf577487f5123aebcc2f913e0b8a2c14b43 ]

SA context is allocated at mlx5_fpga_ipsec_create_sa_ctx,
however the counterpart mlx5_fpga_ipsec_delete_sa_ctx function
nullifies sa_ctx pointer without freeing the memory allocated,
hence the memory leak.

Fix by free SA context when the SA is released.

Fixes: d6c4f0298cec ("net/mlx5: Refactor accel IPSec code")
Signed-off-by: Raed Salem <raeds@mellanox.com>
Reviewed-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c
@@ -848,6 +848,7 @@ void mlx5_fpga_ipsec_delete_sa_ctx(void
 	mutex_lock(&fpga_xfrm->lock);
 	if (!--fpga_xfrm->num_rules) {
 		mlx5_fpga_ipsec_release_sa_ctx(fpga_xfrm->sa_ctx);
+		kfree(fpga_xfrm->sa_ctx);
 		fpga_xfrm->sa_ctx = NULL;
 	}
 	mutex_unlock(&fpga_xfrm->lock);



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 173/195] net: macb: Remove unnecessary alignment check for TSO
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (171 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 172/195] net/mlx5: IPsec, fix memory leak at mlx5_fpga_ipsec_delete_sa_ctx Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 174/195] net: macb: Limit maximum GEM TX length in TSO Greg Kroah-Hartman
                   ` (25 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Harini Katakam, David S. Miller

From: Harini Katakam <harini.katakam@xilinx.com>

[ Upstream commit 41c1ef978c8d0259c6636e6d2d854777e92650eb ]

The IP TSO implementation does NOT require the length to be a
multiple of 8. That is only a requirement for UFO as per IP
documentation. Hence, exit macb_features_check function in the
beginning if the protocol is not UDP. Only when it is UDP,
proceed further to the alignment checks. Update comments to
reflect the same. Also remove dead code checking for protocol
TCP when calculating header length.

Fixes: 1629dd4f763c ("cadence: Add LSO support.")
Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/cadence/macb_main.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -1654,16 +1654,14 @@ static netdev_features_t macb_features_c
 
 	/* Validate LSO compatibility */
 
-	/* there is only one buffer */
-	if (!skb_is_nonlinear(skb))
+	/* there is only one buffer or protocol is not UDP */
+	if (!skb_is_nonlinear(skb) || (ip_hdr(skb)->protocol != IPPROTO_UDP))
 		return features;
 
 	/* length of header */
 	hdrlen = skb_transport_offset(skb);
-	if (ip_hdr(skb)->protocol == IPPROTO_TCP)
-		hdrlen += tcp_hdrlen(skb);
 
-	/* For LSO:
+	/* For UFO only:
 	 * When software supplies two or more payload buffers all payload buffers
 	 * apart from the last must be a multiple of 8 bytes in size.
 	 */



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 174/195] net: macb: Limit maximum GEM TX length in TSO
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (172 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 173/195] net: macb: Remove unnecessary alignment check for TSO Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 175/195] net: dsa: b53: Always use dev->vlan_enabled in b53_configure_vlan() Greg Kroah-Hartman
                   ` (24 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel; +Cc: Greg Kroah-Hartman, stable, Harini Katakam, David S. Miller

From: Harini Katakam <harini.katakam@xilinx.com>

[ Upstream commit f822e9c4ffa511a5c681cf866287d9383a3b6f1b ]

GEM_MAX_TX_LEN currently resolves to 0x3FF8 for any IP version supporting
TSO with full 14bits of length field in payload descriptor. But an IP
errata causes false amba_error (bit 6 of ISR) when length in payload
descriptors is specified above 16387. The error occurs because the DMA
falsely concludes that there is not enough space in SRAM for incoming
payload. These errors were observed continuously under stress of large
packets using iperf on a version where SRAM was 16K for each queue. This
errata will be documented shortly and affects all versions since TSO
functionality was added. Hence limit the max length to 0x3FC0 (rounded).

Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/cadence/macb_main.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -66,7 +66,11 @@
 /* Max length of transmit frame must be a multiple of 8 bytes */
 #define MACB_TX_LEN_ALIGN	8
 #define MACB_MAX_TX_LEN		((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1) & ~((unsigned int)(MACB_TX_LEN_ALIGN - 1)))
-#define GEM_MAX_TX_LEN		((unsigned int)((1 << GEM_TX_FRMLEN_SIZE) - 1) & ~((unsigned int)(MACB_TX_LEN_ALIGN - 1)))
+/* Limit maximum TX length as per Cadence TSO errata. This is to avoid a
+ * false amba_error in TX path from the DMA assuming there is not enough
+ * space in the SRAM (16KB) even when there is.
+ */
+#define GEM_MAX_TX_LEN		(unsigned int)(0x3FC0)
 
 #define GEM_MTU_MIN_SIZE	ETH_MIN_MTU
 #define MACB_NETIF_LSO		NETIF_F_TSO



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 175/195] net: dsa: b53: Always use dev->vlan_enabled in b53_configure_vlan()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (173 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 174/195] net: macb: Limit maximum GEM TX length in TSO Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 176/195] ext4: fix deadlock allocating crypto bounce page from mempool Greg Kroah-Hartman
                   ` (23 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Florian Fainelli, David S. Miller

From: Florian Fainelli <f.fainelli@gmail.com>

[ Upstream commit df373702bc0f8f2d83980ea441e71639fc1efcf8 ]

b53_configure_vlan() is called by the bcm_sf2 driver upon setup and
indirectly through resume as well. During the initial setup, we are
guaranteed that dev->vlan_enabled is false, so there is no change in
behavior, however during suspend, we may have enabled VLANs before, so we
do want to restore that setting.

Fixes: dad8d7c6452b ("net: dsa: b53: Properly account for VLAN filtering")
Fixes: 967dd82ffc52 ("net: dsa: b53: Add support for Broadcom RoboSwitch")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/dsa/b53/b53_common.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -655,7 +655,7 @@ int b53_configure_vlan(struct dsa_switch
 		b53_do_vlan_op(dev, VTA_CMD_CLEAR);
 	}
 
-	b53_enable_vlan(dev, false, dev->vlan_filtering_enabled);
+	b53_enable_vlan(dev, dev->vlan_enabled, dev->vlan_filtering_enabled);
 
 	b53_for_each_port(dev, i)
 		b53_write16(dev, B53_VLAN_PAGE,



^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 176/195] ext4: fix deadlock allocating crypto bounce page from mempool
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (174 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 175/195] net: dsa: b53: Always use dev->vlan_enabled in b53_configure_vlan() Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 177/195] btrfs: use bool argument in free_root_pointers() Greg Kroah-Hartman
                   ` (22 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Eric Biggers, Theodore Tso, Sasha Levin

From: Eric Biggers <ebiggers@google.com>

[ Upstream commit 547c556f4db7c09447ecf5f833ab6aaae0c5ab58 ]

ext4_writepages() on an encrypted file has to encrypt the data, but it
can't modify the pagecache pages in-place, so it encrypts the data into
bounce pages and writes those instead.  All bounce pages are allocated
from a mempool using GFP_NOFS.

This is not correct use of a mempool, and it can deadlock.  This is
because GFP_NOFS includes __GFP_DIRECT_RECLAIM, which enables the "never
fail" mode for mempool_alloc() where a failed allocation will fall back
to waiting for one of the preallocated elements in the pool.

But since this mode is used for all a bio's pages and not just the
first, it can deadlock waiting for pages already in the bio to be freed.

This deadlock can be reproduced by patching mempool_alloc() to pretend
that pool->alloc() always fails (so that it always falls back to the
preallocations), and then creating an encrypted file of size > 128 KiB.

Fix it by only using GFP_NOFS for the first page in the bio.  For
subsequent pages just use GFP_NOWAIT, and if any of those fail, just
submit the bio and start a new one.

This will need to be fixed in f2fs too, but that's less straightforward.

Fixes: c9af28fdd449 ("ext4 crypto: don't let data integrity writebacks fail with ENOMEM")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Link: https://lore.kernel.org/r/20191231181149.47619-1-ebiggers@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/page-io.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index db7590178dfcf..9cc79b7b0df11 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -481,17 +481,26 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 	    nr_to_submit) {
 		gfp_t gfp_flags = GFP_NOFS;
 
+		/*
+		 * Since bounce page allocation uses a mempool, we can only use
+		 * a waiting mask (i.e. request guaranteed allocation) on the
+		 * first page of the bio.  Otherwise it can deadlock.
+		 */
+		if (io->io_bio)
+			gfp_flags = GFP_NOWAIT | __GFP_NOWARN;
 	retry_encrypt:
 		data_page = fscrypt_encrypt_page(inode, page, PAGE_SIZE, 0,
 						page->index, gfp_flags);
 		if (IS_ERR(data_page)) {
 			ret = PTR_ERR(data_page);
-			if (ret == -ENOMEM && wbc->sync_mode == WB_SYNC_ALL) {
-				if (io->io_bio) {
+			if (ret == -ENOMEM &&
+			    (io->io_bio || wbc->sync_mode == WB_SYNC_ALL)) {
+				gfp_flags = GFP_NOFS;
+				if (io->io_bio)
 					ext4_io_submit(io);
-					congestion_wait(BLK_RW_ASYNC, HZ/50);
-				}
-				gfp_flags |= __GFP_NOFAIL;
+				else
+					gfp_flags |= __GFP_NOFAIL;
+				congestion_wait(BLK_RW_ASYNC, HZ/50);
 				goto retry_encrypt;
 			}
 			data_page = NULL;
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 177/195] btrfs: use bool argument in free_root_pointers()
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (175 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 176/195] ext4: fix deadlock allocating crypto bounce page from mempool Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 178/195] btrfs: free block groups after freeing fs trees Greg Kroah-Hartman
                   ` (21 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Qu Wenruo, Anand Jain, David Sterba,
	Sasha Levin

From: Anand Jain <anand.jain@oracle.com>

[ Upstream commit 4273eaff9b8d5e141113a5bdf9628c02acf3afe5 ]

We don't need int argument bool shall do in free_root_pointers().  And
rename the argument as it confused two people.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/btrfs/disk-io.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 15212e835e02c..d296ea329bd4e 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2031,7 +2031,7 @@ static void free_root_extent_buffers(struct btrfs_root *root)
 }
 
 /* helper to cleanup tree roots */
-static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root)
+static void free_root_pointers(struct btrfs_fs_info *info, bool free_chunk_root)
 {
 	free_root_extent_buffers(info->tree_root);
 
@@ -2040,7 +2040,7 @@ static void free_root_pointers(struct btrfs_fs_info *info, int chunk_root)
 	free_root_extent_buffers(info->csum_root);
 	free_root_extent_buffers(info->quota_root);
 	free_root_extent_buffers(info->uuid_root);
-	if (chunk_root)
+	if (free_chunk_root)
 		free_root_extent_buffers(info->chunk_root);
 	free_root_extent_buffers(info->free_space_root);
 }
@@ -3273,7 +3273,7 @@ int open_ctree(struct super_block *sb,
 	btrfs_put_block_group_cache(fs_info);
 
 fail_tree_roots:
-	free_root_pointers(fs_info, 1);
+	free_root_pointers(fs_info, true);
 	invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
 
 fail_sb_buffer:
@@ -3301,7 +3301,7 @@ int open_ctree(struct super_block *sb,
 	if (!btrfs_test_opt(fs_info, USEBACKUPROOT))
 		goto fail_tree_roots;
 
-	free_root_pointers(fs_info, 0);
+	free_root_pointers(fs_info, false);
 
 	/* don't use the log in recovery mode, it won't be valid */
 	btrfs_set_super_log_root(disk_super, 0);
@@ -3986,7 +3986,7 @@ void close_ctree(struct btrfs_fs_info *fs_info)
 	btrfs_free_block_groups(fs_info);
 
 	clear_bit(BTRFS_FS_OPEN, &fs_info->flags);
-	free_root_pointers(fs_info, 1);
+	free_root_pointers(fs_info, true);
 
 	iput(fs_info->btree_inode);
 
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 178/195] btrfs: free block groups after freeing fs trees
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (176 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 177/195] btrfs: use bool argument in free_root_pointers() Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 179/195] drm: atmel-hlcdc: enable clock before configuring timing engine Greg Kroah-Hartman
                   ` (20 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Josef Bacik, David Sterba, Sasha Levin

From: Josef Bacik <josef@toxicpanda.com>

[ Upstream commit 4e19443da1941050b346f8fc4c368aa68413bc88 ]

Sometimes when running generic/475 we would trip the
WARN_ON(cache->reserved) check when free'ing the block groups on umount.
This is because sometimes we don't commit the transaction because of IO
errors and thus do not cleanup the tree logs until at umount time.

These blocks are still reserved until they are cleaned up, but they
aren't cleaned up until _after_ we do the free block groups work.  Fix
this by moving the free after free'ing the fs roots, that way all of the
tree logs are cleaned up and we have a properly cleaned fs.  A bunch of
loops of generic/475 confirmed this fixes the problem.

CC: stable@vger.kernel.org # 4.9+
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/btrfs/disk-io.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index d296ea329bd4e..9e467e8a8cb5d 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3983,11 +3983,18 @@ void close_ctree(struct btrfs_fs_info *fs_info)
 	invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
 	btrfs_stop_all_workers(fs_info);
 
-	btrfs_free_block_groups(fs_info);
-
 	clear_bit(BTRFS_FS_OPEN, &fs_info->flags);
 	free_root_pointers(fs_info, true);
 
+	/*
+	 * We must free the block groups after dropping the fs_roots as we could
+	 * have had an IO error and have left over tree log blocks that aren't
+	 * cleaned up until the fs roots are freed.  This makes the block group
+	 * accounting appear to be wrong because there's pending reserved bytes,
+	 * so make sure we do the block group cleanup afterwards.
+	 */
+	btrfs_free_block_groups(fs_info);
+
 	iput(fs_info->btree_inode);
 
 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 179/195] drm: atmel-hlcdc: enable clock before configuring timing engine
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (177 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 178/195] btrfs: free block groups after freeing fs trees Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 180/195] drm/dp_mst: Remove VCPI while disabling topology mgr Greg Kroah-Hartman
                   ` (19 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Claudiu Beznea, Sam Ravnborg,
	Boris Brezillon, Sasha Levin

From: Claudiu Beznea <claudiu.beznea@microchip.com>

[ Upstream commit 2c1fb9d86f6820abbfaa38a6836157c76ccb4e7b ]

Changing pixel clock source without having this clock source enabled
will block the timing engine and the next operations after (in this case
setting ATMEL_HLCDC_CFG(5) settings in atmel_hlcdc_crtc_mode_set_nofb()
will fail). It is recomended (although in datasheet this is not present)
to actually enabled pixel clock source before doing any changes on timing
enginge (only SAM9X60 datasheet specifies that the peripheral clock and
pixel clock must be enabled before using LCD controller).

Fixes: 1a396789f65a ("drm: add Atmel HLCDC Display Controller support")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: <stable@vger.kernel.org> # v4.0+
Link: https://patchwork.freedesktop.org/patch/msgid/1576672109-22707-3-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
index d73281095faca..976109c20d493 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
@@ -79,7 +79,11 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
 	struct videomode vm;
 	unsigned long prate;
 	unsigned int cfg;
-	int div;
+	int div, ret;
+
+	ret = clk_prepare_enable(crtc->dc->hlcdc->sys_clk);
+	if (ret)
+		return;
 
 	vm.vfront_porch = adj->crtc_vsync_start - adj->crtc_vdisplay;
 	vm.vback_porch = adj->crtc_vtotal - adj->crtc_vsync_end;
@@ -138,6 +142,8 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
 			   ATMEL_HLCDC_VSPSU | ATMEL_HLCDC_VSPHO |
 			   ATMEL_HLCDC_GUARDTIME_MASK | ATMEL_HLCDC_MODE_MASK,
 			   cfg);
+
+	clk_disable_unprepare(crtc->dc->hlcdc->sys_clk);
 }
 
 static enum drm_mode_status
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 180/195] drm/dp_mst: Remove VCPI while disabling topology mgr
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (178 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 179/195] drm: atmel-hlcdc: enable clock before configuring timing engine Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:33 ` [PATCH 4.19 181/195] btrfs: flush write bio if we loop in extent_write_cache_pages Greg Kroah-Hartman
                   ` (18 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Wayne Lin, Lyude Paul, Sasha Levin

From: Wayne Lin <Wayne.Lin@amd.com>

[ Upstream commit 64e62bdf04ab8529f45ed0a85122c703035dec3a ]

[Why]

This patch is trying to address the issue observed when hotplug DP
daisy chain monitors.

e.g.
src-mstb-mstb-sst -> src (unplug) mstb-mstb-sst -> src-mstb-mstb-sst
(plug in again)

Once unplug a DP MST capable device, driver will call
drm_dp_mst_topology_mgr_set_mst() to disable MST. In this function,
it cleans data of topology manager while disabling mst_state. However,
it doesn't clean up the proposed_vcpis of topology manager.
If proposed_vcpi is not reset, once plug in MST daisy chain monitors
later, code will fail at checking port validation while trying to
allocate payloads.

When MST capable device is plugged in again and try to allocate
payloads by calling drm_dp_update_payload_part1(), this
function will iterate over all proposed virtual channels to see if
any proposed VCPI's num_slots is greater than 0. If any proposed
VCPI's num_slots is greater than 0 and the port which the
specific virtual channel directed to is not in the topology, code then
fails at the port validation. Since there are stale VCPI allocations
from the previous topology enablement in proposed_vcpi[], code will fail
at port validation and reurn EINVAL.

[How]

Clean up the data of stale proposed_vcpi[] and reset mgr->proposed_vcpis
to NULL while disabling mst in drm_dp_mst_topology_mgr_set_mst().

Changes since v1:
*Add on more details in commit message to describe the issue which the
patch is trying to fix

Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
[added cc to stable]
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191205090043.7580-1-Wayne.Lin@amd.com
Cc: <stable@vger.kernel.org> # v3.17+
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 58fe3945494cf..bf4eed5f6a7ee 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2125,6 +2125,7 @@ static bool drm_dp_get_vc_payload_bw(int dp_link_bw,
 int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool mst_state)
 {
 	int ret = 0;
+	int i = 0;
 	struct drm_dp_mst_branch *mstb = NULL;
 
 	mutex_lock(&mgr->lock);
@@ -2185,10 +2186,21 @@ int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool ms
 		/* this can fail if the device is gone */
 		drm_dp_dpcd_writeb(mgr->aux, DP_MSTM_CTRL, 0);
 		ret = 0;
+		mutex_lock(&mgr->payload_lock);
 		memset(mgr->payloads, 0, mgr->max_payloads * sizeof(struct drm_dp_payload));
 		mgr->payload_mask = 0;
 		set_bit(0, &mgr->payload_mask);
+		for (i = 0; i < mgr->max_payloads; i++) {
+			struct drm_dp_vcpi *vcpi = mgr->proposed_vcpis[i];
+
+			if (vcpi) {
+				vcpi->vcpi = 0;
+				vcpi->num_slots = 0;
+			}
+			mgr->proposed_vcpis[i] = NULL;
+		}
 		mgr->vcpi_mask = 0;
+		mutex_unlock(&mgr->payload_lock);
 	}
 
 out_unlock:
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 181/195] btrfs: flush write bio if we loop in extent_write_cache_pages
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (179 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 180/195] drm/dp_mst: Remove VCPI while disabling topology mgr Greg Kroah-Hartman
@ 2020-02-10 12:33 ` Greg Kroah-Hartman
  2020-02-10 12:34 ` [PATCH 4.19 182/195] KVM: x86/mmu: Apply max PA check for MMIO sptes to 32-bit KVM Greg Kroah-Hartman
                   ` (17 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:33 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Filipe Manana, Josef Bacik,
	David Sterba, Sasha Levin

From: Josef Bacik <josef@toxicpanda.com>

[ Upstream commit 96bf313ecb33567af4cb53928b0c951254a02759 ]

There exists a deadlock with range_cyclic that has existed forever.  If
we loop around with a bio already built we could deadlock with a writer
who has the page locked that we're attempting to write but is waiting on
a page in our bio to be written out.  The task traces are as follows

  PID: 1329874  TASK: ffff889ebcdf3800  CPU: 33  COMMAND: "kworker/u113:5"
   #0 [ffffc900297bb658] __schedule at ffffffff81a4c33f
   #1 [ffffc900297bb6e0] schedule at ffffffff81a4c6e3
   #2 [ffffc900297bb6f8] io_schedule at ffffffff81a4ca42
   #3 [ffffc900297bb708] __lock_page at ffffffff811f145b
   #4 [ffffc900297bb798] __process_pages_contig at ffffffff814bc502
   #5 [ffffc900297bb8c8] lock_delalloc_pages at ffffffff814bc684
   #6 [ffffc900297bb900] find_lock_delalloc_range at ffffffff814be9ff
   #7 [ffffc900297bb9a0] writepage_delalloc at ffffffff814bebd0
   #8 [ffffc900297bba18] __extent_writepage at ffffffff814bfbf2
   #9 [ffffc900297bba98] extent_write_cache_pages at ffffffff814bffbd

  PID: 2167901  TASK: ffff889dc6a59c00  CPU: 14  COMMAND:
  "aio-dio-invalid"
   #0 [ffffc9003b50bb18] __schedule at ffffffff81a4c33f
   #1 [ffffc9003b50bba0] schedule at ffffffff81a4c6e3
   #2 [ffffc9003b50bbb8] io_schedule at ffffffff81a4ca42
   #3 [ffffc9003b50bbc8] wait_on_page_bit at ffffffff811f24d6
   #4 [ffffc9003b50bc60] prepare_pages at ffffffff814b05a7
   #5 [ffffc9003b50bcd8] btrfs_buffered_write at ffffffff814b1359
   #6 [ffffc9003b50bdb0] btrfs_file_write_iter at ffffffff814b5933
   #7 [ffffc9003b50be38] new_sync_write at ffffffff8128f6a8
   #8 [ffffc9003b50bec8] vfs_write at ffffffff81292b9d
   #9 [ffffc9003b50bf00] ksys_pwrite64 at ffffffff81293032

I used drgn to find the respective pages we were stuck on

page_entry.page 0xffffea00fbfc7500 index 8148 bit 15 pid 2167901
page_entry.page 0xffffea00f9bb7400 index 7680 bit 0 pid 1329874

As you can see the kworker is waiting for bit 0 (PG_locked) on index
7680, and aio-dio-invalid is waiting for bit 15 (PG_writeback) on index
8148.  aio-dio-invalid has 7680, and the kworker epd looks like the
following

  crash> struct extent_page_data ffffc900297bbbb0
  struct extent_page_data {
    bio = 0xffff889f747ed830,
    tree = 0xffff889eed6ba448,
    extent_locked = 0,
    sync_io = 0
  }

Probably worth mentioning as well that it waits for writeback of the
page to complete while holding a lock on it (at prepare_pages()).

Using drgn I walked the bio pages looking for page
0xffffea00fbfc7500 which is the one we're waiting for writeback on

  bio = Object(prog, 'struct bio', address=0xffff889f747ed830)
  for i in range(0, bio.bi_vcnt.value_()):
      bv = bio.bi_io_vec[i]
      if bv.bv_page.value_() == 0xffffea00fbfc7500:
	  print("FOUND IT")

which validated what I suspected.

The fix for this is simple, flush the epd before we loop back around to
the beginning of the file during writeout.

Fixes: b293f02e1423 ("Btrfs: Add writepages support")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/btrfs/extent_io.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index fed44390c0492..11efb4f5041c7 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4014,6 +4014,14 @@ static int extent_write_cache_pages(struct address_space *mapping,
 		 */
 		scanned = 1;
 		index = 0;
+
+		/*
+		 * If we're looping we could run into a page that is locked by a
+		 * writer and that writer could be waiting on writeback for a
+		 * page in our current bio, and thus deadlock, so flush the
+		 * write bio here.
+		 */
+		flush_write_bio(epd);
 		goto retry;
 	}
 
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 182/195] KVM: x86/mmu: Apply max PA check for MMIO sptes to 32-bit KVM
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (180 preceding siblings ...)
  2020-02-10 12:33 ` [PATCH 4.19 181/195] btrfs: flush write bio if we loop in extent_write_cache_pages Greg Kroah-Hartman
@ 2020-02-10 12:34 ` Greg Kroah-Hartman
  2020-02-10 12:34 ` [PATCH 4.19 183/195] KVM: x86: Use gpa_t for cr2/gpa to fix TDP support on " Greg Kroah-Hartman
                   ` (16 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:34 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Sean Christopherson, Paolo Bonzini,
	Sasha Levin

From: Sean Christopherson <sean.j.christopherson@intel.com>

[ Upstream commit e30a7d623dccdb3f880fbcad980b0cb589a1da45 ]

Remove the bogus 64-bit only condition from the check that disables MMIO
spte optimization when the system supports the max PA, i.e. doesn't have
any reserved PA bits.  32-bit KVM always uses PAE paging for the shadow
MMU, and per Intel's SDM:

  PAE paging translates 32-bit linear addresses to 52-bit physical
  addresses.

The kernel's restrictions on max physical addresses are limits on how
much memory the kernel can reasonably use, not what physical addresses
are supported by hardware.

Fixes: ce88decffd17 ("KVM: MMU: mmio page fault support")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/kvm/x86.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f2ef42796f00f..1e7c4022c4b56 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6797,7 +6797,7 @@ static void kvm_set_mmio_spte_mask(void)
 	 * If reserved bit is not supported, clear the present bit to disable
 	 * mmio page fault.
 	 */
-	if (IS_ENABLED(CONFIG_X86_64) && maxphyaddr == 52)
+	if (maxphyaddr == 52)
 		mask &= ~1ull;
 
 	kvm_mmu_set_mmio_spte_mask(mask, mask);
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 183/195] KVM: x86: Use gpa_t for cr2/gpa to fix TDP support on 32-bit KVM
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (181 preceding siblings ...)
  2020-02-10 12:34 ` [PATCH 4.19 182/195] KVM: x86/mmu: Apply max PA check for MMIO sptes to 32-bit KVM Greg Kroah-Hartman
@ 2020-02-10 12:34 ` " Greg Kroah-Hartman
  2020-02-10 12:34 ` [PATCH 4.19 184/195] KVM: VMX: Add non-canonical check on writes to RTIT address MSRs Greg Kroah-Hartman
                   ` (15 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:34 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Sean Christopherson, Paolo Bonzini,
	Sasha Levin

From: Sean Christopherson <sean.j.christopherson@intel.com>

[ Upstream commit 736c291c9f36b07f8889c61764c28edce20e715d ]

Convert a plethora of parameters and variables in the MMU and page fault
flows from type gva_t to gpa_t to properly handle TDP on 32-bit KVM.

Thanks to PSE and PAE paging, 32-bit kernels can access 64-bit physical
addresses.  When TDP is enabled, the fault address is a guest physical
address and thus can be a 64-bit value, even when both KVM and its guest
are using 32-bit virtual addressing, e.g. VMX's VMCS.GUEST_PHYSICAL is a
64-bit field, not a natural width field.

Using a gva_t for the fault address means KVM will incorrectly drop the
upper 32-bits of the GPA.  Ditto for gva_to_gpa() when it is used to
translate L2 GPAs to L1 GPAs.

Opportunistically rename variables and parameters to better reflect the
dual address modes, e.g. use "cr2_or_gpa" for fault addresses and plain
"addr" instead of "vaddr" when the address may be either a GVA or an L2
GPA.  Similarly, use "gpa" in the nonpaging_page_fault() flows to avoid
a confusing "gpa_t gva" declaration; this also sets the stage for a
future patch to combing nonpaging_page_fault() and tdp_page_fault() with
minimal churn.

Sprinkle in a few comments to document flows where an address is known
to be a GVA and thus can be safely truncated to a 32-bit value.  Add
WARNs in kvm_handle_page_fault() and FNAME(gva_to_gpa_nested)() to help
document such cases and detect bugs.

Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/include/asm/kvm_host.h |  8 ++--
 arch/x86/kvm/mmu.c              | 72 +++++++++++++++++++--------------
 arch/x86/kvm/mmutrace.h         | 12 +++---
 arch/x86/kvm/paging_tmpl.h      | 25 +++++++-----
 arch/x86/kvm/x86.c              | 37 ++++++++---------
 arch/x86/kvm/x86.h              |  2 +-
 include/linux/kvm_host.h        |  6 +--
 virt/kvm/async_pf.c             | 10 ++---
 8 files changed, 94 insertions(+), 78 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 155be8adb934e..21a58fcc3dd47 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -350,12 +350,12 @@ struct kvm_mmu {
 	void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root);
 	unsigned long (*get_cr3)(struct kvm_vcpu *vcpu);
 	u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index);
-	int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err,
+	int (*page_fault)(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u32 err,
 			  bool prefault);
 	void (*inject_page_fault)(struct kvm_vcpu *vcpu,
 				  struct x86_exception *fault);
-	gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access,
-			    struct x86_exception *exception);
+	gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gpa_t gva_or_gpa,
+			    u32 access, struct x86_exception *exception);
 	gpa_t (*translate_gpa)(struct kvm_vcpu *vcpu, gpa_t gpa, u32 access,
 			       struct x86_exception *exception);
 	int (*sync_page)(struct kvm_vcpu *vcpu,
@@ -1354,7 +1354,7 @@ void kvm_vcpu_deactivate_apicv(struct kvm_vcpu *vcpu);
 
 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
 
-int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u64 error_code,
+int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code,
 		       void *insn, int insn_len);
 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
 void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid);
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index eddf91a0e363e..e878b4cc8359d 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3390,7 +3390,7 @@ static bool is_access_allowed(u32 fault_err_code, u64 spte)
  * - true: let the vcpu to access on the same address again.
  * - false: let the real page fault path to fix it.
  */
-static bool fast_page_fault(struct kvm_vcpu *vcpu, gva_t gva, int level,
+static bool fast_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, int level,
 			    u32 error_code)
 {
 	struct kvm_shadow_walk_iterator iterator;
@@ -3410,7 +3410,7 @@ static bool fast_page_fault(struct kvm_vcpu *vcpu, gva_t gva, int level,
 	do {
 		u64 new_spte;
 
-		for_each_shadow_entry_lockless(vcpu, gva, iterator, spte)
+		for_each_shadow_entry_lockless(vcpu, cr2_or_gpa, iterator, spte)
 			if (!is_shadow_present_pte(spte) ||
 			    iterator.level < level)
 				break;
@@ -3488,7 +3488,7 @@ static bool fast_page_fault(struct kvm_vcpu *vcpu, gva_t gva, int level,
 
 	} while (true);
 
-	trace_fast_page_fault(vcpu, gva, error_code, iterator.sptep,
+	trace_fast_page_fault(vcpu, cr2_or_gpa, error_code, iterator.sptep,
 			      spte, fault_handled);
 	walk_shadow_page_lockless_end(vcpu);
 
@@ -3496,10 +3496,11 @@ static bool fast_page_fault(struct kvm_vcpu *vcpu, gva_t gva, int level,
 }
 
 static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
-			 gva_t gva, kvm_pfn_t *pfn, bool write, bool *writable);
+			 gpa_t cr2_or_gpa, kvm_pfn_t *pfn, bool write,
+			 bool *writable);
 static int make_mmu_pages_available(struct kvm_vcpu *vcpu);
 
-static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, u32 error_code,
+static int nonpaging_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
 			 gfn_t gfn, bool prefault)
 {
 	int r;
@@ -3525,16 +3526,16 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, u32 error_code,
 		gfn &= ~(KVM_PAGES_PER_HPAGE(level) - 1);
 	}
 
-	if (fast_page_fault(vcpu, v, level, error_code))
+	if (fast_page_fault(vcpu, gpa, level, error_code))
 		return RET_PF_RETRY;
 
 	mmu_seq = vcpu->kvm->mmu_notifier_seq;
 	smp_rmb();
 
-	if (try_async_pf(vcpu, prefault, gfn, v, &pfn, write, &map_writable))
+	if (try_async_pf(vcpu, prefault, gfn, gpa, &pfn, write, &map_writable))
 		return RET_PF_RETRY;
 
-	if (handle_abnormal_pfn(vcpu, v, gfn, pfn, ACC_ALL, &r))
+	if (handle_abnormal_pfn(vcpu, gpa, gfn, pfn, ACC_ALL, &r))
 		return r;
 
 	r = RET_PF_RETRY;
@@ -3545,7 +3546,7 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t v, u32 error_code,
 		goto out_unlock;
 	if (likely(!force_pt_level))
 		transparent_hugepage_adjust(vcpu, gfn, &pfn, &level);
-	r = __direct_map(vcpu, v, write, map_writable, level, pfn,
+	r = __direct_map(vcpu, gpa, write, map_writable, level, pfn,
 			 prefault, false);
 out_unlock:
 	spin_unlock(&vcpu->kvm->mmu_lock);
@@ -3838,7 +3839,7 @@ void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu)
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_sync_roots);
 
-static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr,
+static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gpa_t vaddr,
 				  u32 access, struct x86_exception *exception)
 {
 	if (exception)
@@ -3846,7 +3847,7 @@ static gpa_t nonpaging_gva_to_gpa(struct kvm_vcpu *vcpu, gva_t vaddr,
 	return vaddr;
 }
 
-static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gva_t vaddr,
+static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gpa_t vaddr,
 					 u32 access,
 					 struct x86_exception *exception)
 {
@@ -4006,13 +4007,14 @@ static void shadow_page_table_clear_flood(struct kvm_vcpu *vcpu, gva_t addr)
 	walk_shadow_page_lockless_end(vcpu);
 }
 
-static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
+static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa,
 				u32 error_code, bool prefault)
 {
-	gfn_t gfn = gva >> PAGE_SHIFT;
+	gfn_t gfn = gpa >> PAGE_SHIFT;
 	int r;
 
-	pgprintk("%s: gva %lx error %x\n", __func__, gva, error_code);
+	/* Note, paging is disabled, ergo gva == gpa. */
+	pgprintk("%s: gva %lx error %x\n", __func__, gpa, error_code);
 
 	if (page_fault_handle_page_track(vcpu, error_code, gfn))
 		return RET_PF_EMULATE;
@@ -4024,11 +4026,12 @@ static int nonpaging_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
 	MMU_WARN_ON(!VALID_PAGE(vcpu->arch.mmu.root_hpa));
 
 
-	return nonpaging_map(vcpu, gva & PAGE_MASK,
+	return nonpaging_map(vcpu, gpa & PAGE_MASK,
 			     error_code, gfn, prefault);
 }
 
-static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn)
+static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
+				   gfn_t gfn)
 {
 	struct kvm_arch_async_pf arch;
 
@@ -4037,7 +4040,8 @@ static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn)
 	arch.direct_map = vcpu->arch.mmu.direct_map;
 	arch.cr3 = vcpu->arch.mmu.get_cr3(vcpu);
 
-	return kvm_setup_async_pf(vcpu, gva, kvm_vcpu_gfn_to_hva(vcpu, gfn), &arch);
+	return kvm_setup_async_pf(vcpu, cr2_or_gpa,
+				  kvm_vcpu_gfn_to_hva(vcpu, gfn), &arch);
 }
 
 bool kvm_can_do_async_pf(struct kvm_vcpu *vcpu)
@@ -4054,7 +4058,8 @@ bool kvm_can_do_async_pf(struct kvm_vcpu *vcpu)
 }
 
 static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
-			 gva_t gva, kvm_pfn_t *pfn, bool write, bool *writable)
+			 gpa_t cr2_or_gpa, kvm_pfn_t *pfn, bool write,
+			 bool *writable)
 {
 	struct kvm_memory_slot *slot;
 	bool async;
@@ -4074,12 +4079,12 @@ static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn,
 		return false; /* *pfn has correct page already */
 
 	if (!prefault && kvm_can_do_async_pf(vcpu)) {
-		trace_kvm_try_async_get_page(gva, gfn);
+		trace_kvm_try_async_get_page(cr2_or_gpa, gfn);
 		if (kvm_find_async_pf_gfn(vcpu, gfn)) {
-			trace_kvm_async_pf_doublefault(gva, gfn);
+			trace_kvm_async_pf_doublefault(cr2_or_gpa, gfn);
 			kvm_make_request(KVM_REQ_APF_HALT, vcpu);
 			return true;
-		} else if (kvm_arch_setup_async_pf(vcpu, gva, gfn))
+		} else if (kvm_arch_setup_async_pf(vcpu, cr2_or_gpa, gfn))
 			return true;
 	}
 
@@ -4092,6 +4097,12 @@ int kvm_handle_page_fault(struct kvm_vcpu *vcpu, u64 error_code,
 {
 	int r = 1;
 
+#ifndef CONFIG_X86_64
+	/* A 64-bit CR2 should be impossible on 32-bit KVM. */
+	if (WARN_ON_ONCE(fault_address >> 32))
+		return -EFAULT;
+#endif
+
 	vcpu->arch.l1tf_flush_l1d = true;
 	switch (vcpu->arch.apf.host_apf_reason) {
 	default:
@@ -4129,7 +4140,7 @@ check_hugepage_cache_consistency(struct kvm_vcpu *vcpu, gfn_t gfn, int level)
 	return kvm_mtrr_check_gfn_range_consistency(vcpu, gfn, page_num);
 }
 
-static int tdp_page_fault(struct kvm_vcpu *vcpu, gva_t gpa, u32 error_code,
+static int tdp_page_fault(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
 			  bool prefault)
 {
 	kvm_pfn_t pfn;
@@ -5307,7 +5318,7 @@ static int make_mmu_pages_available(struct kvm_vcpu *vcpu)
 	return 0;
 }
 
-int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_code,
+int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code,
 		       void *insn, int insn_len)
 {
 	int r, emulation_type = 0;
@@ -5317,19 +5328,20 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_code,
 	/* With shadow page tables, fault_address contains a GVA or nGPA.  */
 	if (vcpu->arch.mmu.direct_map) {
 		vcpu->arch.gpa_available = true;
-		vcpu->arch.gpa_val = cr2;
+		vcpu->arch.gpa_val = cr2_or_gpa;
 	}
 
 	r = RET_PF_INVALID;
 	if (unlikely(error_code & PFERR_RSVD_MASK)) {
-		r = handle_mmio_page_fault(vcpu, cr2, direct);
+		r = handle_mmio_page_fault(vcpu, cr2_or_gpa, direct);
 		if (r == RET_PF_EMULATE)
 			goto emulate;
 	}
 
 	if (r == RET_PF_INVALID) {
-		r = vcpu->arch.mmu.page_fault(vcpu, cr2, lower_32_bits(error_code),
-					      false);
+		r = vcpu->arch.mmu.page_fault(vcpu, cr2_or_gpa,
+					       lower_32_bits(error_code),
+					       false);
 		WARN_ON(r == RET_PF_INVALID);
 	}
 
@@ -5347,7 +5359,7 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_code,
 	 */
 	if (vcpu->arch.mmu.direct_map &&
 	    (error_code & PFERR_NESTED_GUEST_PAGE) == PFERR_NESTED_GUEST_PAGE) {
-		kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(cr2));
+		kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(cr2_or_gpa));
 		return 1;
 	}
 
@@ -5362,7 +5374,7 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_code,
 	 * explicitly shadowing L1's page tables, i.e. unprotecting something
 	 * for L1 isn't going to magically fix whatever issue cause L2 to fail.
 	 */
-	if (!mmio_info_in_cache(vcpu, cr2, direct) && !is_guest_mode(vcpu))
+	if (!mmio_info_in_cache(vcpu, cr2_or_gpa, direct) && !is_guest_mode(vcpu))
 		emulation_type = EMULTYPE_ALLOW_RETRY;
 emulate:
 	/*
@@ -5375,7 +5387,7 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t cr2, u64 error_code,
 	if (unlikely(insn && !insn_len))
 		return 1;
 
-	er = x86_emulate_instruction(vcpu, cr2, emulation_type, insn, insn_len);
+	er = x86_emulate_instruction(vcpu, cr2_or_gpa, emulation_type, insn, insn_len);
 
 	switch (er) {
 	case EMULATE_DONE:
diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h
index 918b0d5bf2724..cb41b036eb264 100644
--- a/arch/x86/kvm/mmutrace.h
+++ b/arch/x86/kvm/mmutrace.h
@@ -249,13 +249,13 @@ TRACE_EVENT(
 
 TRACE_EVENT(
 	fast_page_fault,
-	TP_PROTO(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code,
+	TP_PROTO(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u32 error_code,
 		 u64 *sptep, u64 old_spte, bool retry),
-	TP_ARGS(vcpu, gva, error_code, sptep, old_spte, retry),
+	TP_ARGS(vcpu, cr2_or_gpa, error_code, sptep, old_spte, retry),
 
 	TP_STRUCT__entry(
 		__field(int, vcpu_id)
-		__field(gva_t, gva)
+		__field(gpa_t, cr2_or_gpa)
 		__field(u32, error_code)
 		__field(u64 *, sptep)
 		__field(u64, old_spte)
@@ -265,7 +265,7 @@ TRACE_EVENT(
 
 	TP_fast_assign(
 		__entry->vcpu_id = vcpu->vcpu_id;
-		__entry->gva = gva;
+		__entry->cr2_or_gpa = cr2_or_gpa;
 		__entry->error_code = error_code;
 		__entry->sptep = sptep;
 		__entry->old_spte = old_spte;
@@ -273,9 +273,9 @@ TRACE_EVENT(
 		__entry->retry = retry;
 	),
 
-	TP_printk("vcpu %d gva %lx error_code %s sptep %p old %#llx"
+	TP_printk("vcpu %d gva %llx error_code %s sptep %p old %#llx"
 		  " new %llx spurious %d fixed %d", __entry->vcpu_id,
-		  __entry->gva, __print_flags(__entry->error_code, "|",
+		  __entry->cr2_or_gpa, __print_flags(__entry->error_code, "|",
 		  kvm_mmu_trace_pferr_flags), __entry->sptep,
 		  __entry->old_spte, __entry->new_spte,
 		  __spte_satisfied(old_spte), __spte_satisfied(new_spte)
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index adf42dc8d38b0..100ae4fabf170 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -273,11 +273,11 @@ static inline unsigned FNAME(gpte_pkeys)(struct kvm_vcpu *vcpu, u64 gpte)
 }
 
 /*
- * Fetch a guest pte for a guest virtual address
+ * Fetch a guest pte for a guest virtual address, or for an L2's GPA.
  */
 static int FNAME(walk_addr_generic)(struct guest_walker *walker,
 				    struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
-				    gva_t addr, u32 access)
+				    gpa_t addr, u32 access)
 {
 	int ret;
 	pt_element_t pte;
@@ -478,7 +478,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
 }
 
 static int FNAME(walk_addr)(struct guest_walker *walker,
-			    struct kvm_vcpu *vcpu, gva_t addr, u32 access)
+			    struct kvm_vcpu *vcpu, gpa_t addr, u32 access)
 {
 	return FNAME(walk_addr_generic)(walker, vcpu, &vcpu->arch.mmu, addr,
 					access);
@@ -593,7 +593,7 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw,
  * If the guest tries to write a write-protected page, we need to
  * emulate this operation, return 1 to indicate this case.
  */
-static int FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
+static int FNAME(fetch)(struct kvm_vcpu *vcpu, gpa_t addr,
 			 struct guest_walker *gw,
 			 int write_fault, int hlevel,
 			 kvm_pfn_t pfn, bool map_writable, bool prefault,
@@ -747,7 +747,7 @@ FNAME(is_self_change_mapping)(struct kvm_vcpu *vcpu,
  *  Returns: 1 if we need to emulate the instruction, 0 otherwise, or
  *           a negative value on error.
  */
-static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr, u32 error_code,
+static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gpa_t addr, u32 error_code,
 			     bool prefault)
 {
 	int write_fault = error_code & PFERR_WRITE_MASK;
@@ -926,18 +926,19 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva, hpa_t root_hpa)
 	spin_unlock(&vcpu->kvm->mmu_lock);
 }
 
-static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
+/* Note, @addr is a GPA when gva_to_gpa() translates an L2 GPA to an L1 GPA. */
+static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gpa_t addr, u32 access,
 			       struct x86_exception *exception)
 {
 	struct guest_walker walker;
 	gpa_t gpa = UNMAPPED_GVA;
 	int r;
 
-	r = FNAME(walk_addr)(&walker, vcpu, vaddr, access);
+	r = FNAME(walk_addr)(&walker, vcpu, addr, access);
 
 	if (r) {
 		gpa = gfn_to_gpa(walker.gfn);
-		gpa |= vaddr & ~PAGE_MASK;
+		gpa |= addr & ~PAGE_MASK;
 	} else if (exception)
 		*exception = walker.fault;
 
@@ -945,7 +946,8 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr, u32 access,
 }
 
 #if PTTYPE != PTTYPE_EPT
-static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
+/* Note, gva_to_gpa_nested() is only used to translate L2 GVAs. */
+static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gpa_t vaddr,
 				      u32 access,
 				      struct x86_exception *exception)
 {
@@ -953,6 +955,11 @@ static gpa_t FNAME(gva_to_gpa_nested)(struct kvm_vcpu *vcpu, gva_t vaddr,
 	gpa_t gpa = UNMAPPED_GVA;
 	int r;
 
+#ifndef CONFIG_X86_64
+	/* A 64-bit GVA should be impossible on 32-bit KVM. */
+	WARN_ON_ONCE(vaddr >> 32);
+#endif
+
 	r = FNAME(walk_addr_nested)(&walker, vcpu, vaddr, access);
 
 	if (r) {
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1e7c4022c4b56..ade694f94a49f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6021,11 +6021,11 @@ static int handle_emulation_failure(struct kvm_vcpu *vcpu, int emulation_type)
 	return r;
 }
 
-static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2,
+static bool reexecute_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 				  bool write_fault_to_shadow_pgtable,
 				  int emulation_type)
 {
-	gpa_t gpa = cr2;
+	gpa_t gpa = cr2_or_gpa;
 	kvm_pfn_t pfn;
 
 	if (!(emulation_type & EMULTYPE_ALLOW_RETRY))
@@ -6039,7 +6039,7 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2,
 		 * Write permission should be allowed since only
 		 * write access need to be emulated.
 		 */
-		gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL);
+		gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2_or_gpa, NULL);
 
 		/*
 		 * If the mapping is invalid in guest, let cpu retry
@@ -6096,10 +6096,10 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2,
 }
 
 static bool retry_instruction(struct x86_emulate_ctxt *ctxt,
-			      unsigned long cr2,  int emulation_type)
+			      gpa_t cr2_or_gpa,  int emulation_type)
 {
 	struct kvm_vcpu *vcpu = emul_to_vcpu(ctxt);
-	unsigned long last_retry_eip, last_retry_addr, gpa = cr2;
+	unsigned long last_retry_eip, last_retry_addr, gpa = cr2_or_gpa;
 
 	last_retry_eip = vcpu->arch.last_retry_eip;
 	last_retry_addr = vcpu->arch.last_retry_addr;
@@ -6128,14 +6128,14 @@ static bool retry_instruction(struct x86_emulate_ctxt *ctxt,
 	if (x86_page_table_writing_insn(ctxt))
 		return false;
 
-	if (ctxt->eip == last_retry_eip && last_retry_addr == cr2)
+	if (ctxt->eip == last_retry_eip && last_retry_addr == cr2_or_gpa)
 		return false;
 
 	vcpu->arch.last_retry_eip = ctxt->eip;
-	vcpu->arch.last_retry_addr = cr2;
+	vcpu->arch.last_retry_addr = cr2_or_gpa;
 
 	if (!vcpu->arch.mmu.direct_map)
-		gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL);
+		gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2_or_gpa, NULL);
 
 	kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa));
 
@@ -6296,11 +6296,8 @@ static bool is_vmware_backdoor_opcode(struct x86_emulate_ctxt *ctxt)
 	return false;
 }
 
-int x86_emulate_instruction(struct kvm_vcpu *vcpu,
-			    unsigned long cr2,
-			    int emulation_type,
-			    void *insn,
-			    int insn_len)
+int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
+			    int emulation_type, void *insn, int insn_len)
 {
 	int r;
 	struct x86_emulate_ctxt *ctxt = &vcpu->arch.emulate_ctxt;
@@ -6343,7 +6340,7 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu,
 		if (r != EMULATION_OK)  {
 			if (emulation_type & EMULTYPE_TRAP_UD)
 				return EMULATE_FAIL;
-			if (reexecute_instruction(vcpu, cr2, write_fault_to_spt,
+			if (reexecute_instruction(vcpu, cr2_or_gpa, write_fault_to_spt,
 						emulation_type))
 				return EMULATE_DONE;
 			if (ctxt->have_exception) {
@@ -6373,7 +6370,7 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu,
 		return EMULATE_DONE;
 	}
 
-	if (retry_instruction(ctxt, cr2, emulation_type))
+	if (retry_instruction(ctxt, cr2_or_gpa, emulation_type))
 		return EMULATE_DONE;
 
 	/* this is needed for vmware backdoor interface to work since it
@@ -6385,7 +6382,7 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu,
 
 restart:
 	/* Save the faulting GPA (cr2) in the address field */
-	ctxt->exception.address = cr2;
+	ctxt->exception.address = cr2_or_gpa;
 
 	r = x86_emulate_insn(ctxt);
 
@@ -6393,7 +6390,7 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu,
 		return EMULATE_DONE;
 
 	if (r == EMULATION_FAILED) {
-		if (reexecute_instruction(vcpu, cr2, write_fault_to_spt,
+		if (reexecute_instruction(vcpu, cr2_or_gpa, write_fault_to_spt,
 					emulation_type))
 			return EMULATE_DONE;
 
@@ -9555,7 +9552,7 @@ void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, struct kvm_async_pf *work)
 	      work->arch.cr3 != vcpu->arch.mmu.get_cr3(vcpu))
 		return;
 
-	vcpu->arch.mmu.page_fault(vcpu, work->gva, 0, true);
+	vcpu->arch.mmu.page_fault(vcpu, work->cr2_or_gpa, 0, true);
 }
 
 static inline u32 kvm_async_pf_hash_fn(gfn_t gfn)
@@ -9638,7 +9635,7 @@ void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 {
 	struct x86_exception fault;
 
-	trace_kvm_async_pf_not_present(work->arch.token, work->gva);
+	trace_kvm_async_pf_not_present(work->arch.token, work->cr2_or_gpa);
 	kvm_add_async_pf_gfn(vcpu, work->arch.gfn);
 
 	if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) ||
@@ -9666,7 +9663,7 @@ void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 		work->arch.token = ~0; /* broadcast wakeup */
 	else
 		kvm_del_async_pf_gfn(vcpu, work->arch.gfn);
-	trace_kvm_async_pf_ready(work->arch.token, work->gva);
+	trace_kvm_async_pf_ready(work->arch.token, work->cr2_or_gpa);
 
 	if (vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED &&
 	    !apf_get_user(vcpu, &val)) {
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 608e5f8c5d0a5..422331b257d3a 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -284,7 +284,7 @@ int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn,
 					  int page_num);
 bool kvm_vector_hashing_enabled(void);
-int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2,
+int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
 			    int emulation_type, void *insn, int insn_len);
 
 #define KVM_SUPPORTED_XCR0     (XFEATURE_MASK_FP | XFEATURE_MASK_SSE \
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 748016ae01e3a..f6394fd4b284b 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -186,7 +186,7 @@ struct kvm_async_pf {
 	struct list_head queue;
 	struct kvm_vcpu *vcpu;
 	struct mm_struct *mm;
-	gva_t gva;
+	gpa_t cr2_or_gpa;
 	unsigned long addr;
 	struct kvm_arch_async_pf arch;
 	bool   wakeup_all;
@@ -194,8 +194,8 @@ struct kvm_async_pf {
 
 void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
 void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
-int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
-		       struct kvm_arch_async_pf *arch);
+int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
+		       unsigned long hva, struct kvm_arch_async_pf *arch);
 int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
 #endif
 
diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c
index 23c2519c5b32a..c9861c2315e8e 100644
--- a/virt/kvm/async_pf.c
+++ b/virt/kvm/async_pf.c
@@ -76,7 +76,7 @@ static void async_pf_execute(struct work_struct *work)
 	struct mm_struct *mm = apf->mm;
 	struct kvm_vcpu *vcpu = apf->vcpu;
 	unsigned long addr = apf->addr;
-	gva_t gva = apf->gva;
+	gpa_t cr2_or_gpa = apf->cr2_or_gpa;
 	int locked = 1;
 
 	might_sleep();
@@ -104,7 +104,7 @@ static void async_pf_execute(struct work_struct *work)
 	 * this point
 	 */
 
-	trace_kvm_async_pf_completed(addr, gva);
+	trace_kvm_async_pf_completed(addr, cr2_or_gpa);
 
 	if (swq_has_sleeper(&vcpu->wq))
 		swake_up_one(&vcpu->wq);
@@ -177,8 +177,8 @@ void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu)
 	}
 }
 
-int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
-		       struct kvm_arch_async_pf *arch)
+int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
+		       unsigned long hva, struct kvm_arch_async_pf *arch)
 {
 	struct kvm_async_pf *work;
 
@@ -197,7 +197,7 @@ int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, unsigned long hva,
 
 	work->wakeup_all = false;
 	work->vcpu = vcpu;
-	work->gva = gva;
+	work->cr2_or_gpa = cr2_or_gpa;
 	work->addr = hva;
 	work->arch = *arch;
 	work->mm = current->mm;
-- 
2.20.1




^ permalink raw reply	[flat|nested] 205+ messages in thread

* [PATCH 4.19 184/195] KVM: VMX: Add non-canonical check on writes to RTIT address MSRs
  2020-02-10 12:30 [PATCH 4.19 000/195] 4.19.103-stable review Greg Kroah-Hartman
                   ` (182 preceding siblings ...)
  2020-02-10 12:34 ` [PATCH 4.19 183/195] KVM: x86: Use gpa_t for cr2/gpa to fix TDP support on " Greg Kroah-Hartman
@ 2020-02-10 12:34 ` Greg Kroah-Hartman
  2020-02-10 12:34 ` [PATCH 4.19 185/195] KVM: nVMX: vmread should not set rflags to specify success in case of #PF Greg Kroah-Hartman
                   ` (14 subsequent siblings)
  198 siblings, 0 replies; 205+ messages in thread
From: Greg Kroah-Hartman @ 2020-02-10 12:34 UTC (permalink / raw)
  To: linux-kernel
  Cc: Greg Kroah-Hartman, stable, Sean Christopherson, Paolo Bonzini,
	Sasha Levin

From: Sean Christopherson <sean.j.christopherson@intel.com>

[ Upstream commit fe6ed369fca98e99df55c932b85782a5687526b5 ]

Reject writes to RTIT address MSRs if the data being written is a
non-canonical address as the MSRs are subject to canonical checks, e.g.
KVM will trigger an unchecked #GP when loading the values to hardware
during pt_guest_enter().

Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/kvm/vmx/vmx.c | 8033 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 8033 insertions(+)
 create mode 100644 arch/x86/kvm/vmx/vmx.c

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
new file mode 100644
index 0000000000000..3791ce8d269e0
--- /dev/null
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -0,0 +1,8033 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Kernel-based Virtual Machine driver for Linux
+ *
+ * This module enables machines with Intel VT-x extensions to run virtual
+ * machines without emulation or binary translation.
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ *
+ * Authors:
+ *   Avi Kivity   <avi@qumranet.com>
+ *   Yaniv Kamay  <yaniv@qumranet.com>
+ */
+
+#include <linux/frame.h>
+#include <linux/highmem.h>
+#include <linux/hrtimer.h>
+#include <linux/kernel.h>
+#include <linux/kvm_host.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/sched/smt.h>
+#include <linux/slab.h>
+#include <linux/tboot.h>
+#include <linux/trace_events.h>
+
+#include <asm/apic.h>
+#include <asm/asm.h>
+#include <asm/cpu.h>
+#include <asm/debugreg.h>
+#include <asm/desc.h>
+#include <asm/fpu/internal.h>
+#include <asm/io.h>
+#include <asm/irq_remapping.h>
+#include <asm/kexec.h>
+#include <asm/perf_event.h>
+#include <asm/mce.h>
+#include <asm/mmu_context.h>
+#include <asm/mshyperv.h>
+#include <asm/spec-ctrl.h>
+#include <asm/virtext.h>
+#include <asm/vmx.h>
+
+#include "capabilities.h"
+#include "cpuid.h"
+#include "evmcs.h"
+#include "irq.h"
+#include "kvm_cache_regs.h"
+#include "lapic.h"
+#include "mmu.h"
+#include "nested.h"
+#include "ops.h"
+#include "pmu.h"
+#include "trace.h"
+#include "vmcs.h"
+#include "vmcs12.h"
+#include "vmx.h"
+#include "x86.h"
+
+MODULE_AUTHOR("Qumranet");
+MODULE_LICENSE("GPL");
+
+static const struct x86_cpu_id vmx_cpu_id[] = {
+	X86_FEATURE_MATCH(X86_FEATURE_VMX),
+	{}
+};
+MODULE_DEVICE_TABLE(x86cpu, vmx_cpu_id);
+
+bool __read_mostly enable_vpid = 1;
+module_param_named(vpid, enable_vpid, bool, 0444);
+
+static bool __read_mostly enable_vnmi = 1;
+module_param_named(vnmi, enable_vnmi, bool, S_IRUGO);
+
+bool __read_mostly flexpriority_enabled = 1;
+module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO);
+
+bool __read_mostly enable_ept = 1;
+module_param_named(ept, enable_ept, bool, S_IRUGO);
+
+bool __read_mostly enable_unrestricted_guest = 1;
+module_param_named(unrestricted_guest,
+			enable_unrestricted_guest, bool, S_IRUGO);
+
+bool __read_mostly enable_ept_ad_bits = 1;
+module_param_named(eptad, enable_ept_ad_bits, bool, S_IRUGO);
+
+static bool __read_mostly emulate_invalid_guest_state = true;
+module_param(emulate_invalid_guest_state, bool, S_IRUGO);
+
+static bool __read_mostly fasteoi = 1;
+module_param(fasteoi, bool, S_IRUGO);
+
+static bool __read_mostly enable_apicv = 1;
+module_param(enable_apicv, bool, S_IRUGO);
+
+/*
+ * If nested=1, nested virtualization is supported, i.e., guests may use
+ * VMX and be a hypervisor for its own guests. If nested=0, guests may not
+ * use VMX instructions.
+ */
+static bool __read_mostly nested = 1;
+module_param(nested, bool, S_IRUGO);
+
+bool __read_mostly enable_pml = 1;
+module_param_named(pml, enable_pml, bool, S_IRUGO);
+
+static bool __read_mostly dump_invalid_vmcs = 0;
+module_param(dump_invalid_vmcs, bool, 0644);
+
+#define MSR_BITMAP_MODE_X2APIC		1
+#define MSR_BITMAP_MODE_X2APIC_APICV	2
+
+#define KVM_VMX_TSC_MULTIPLIER_MAX     0xffffffffffffffffULL
+
+/* Guest_tsc -> host_tsc conversion requires 64-bit division.  */
+static int __read_mostly cpu_preemption_timer_multi;
+static bool __read_mostly enable_preemption_timer = 1;
+#ifdef CONFIG_X86_64
+module_param_named(preemption_timer, enable_preemption_timer, bool, S_IRUGO);
+#endif
+
+#define KVM_VM_CR0_ALWAYS_OFF (X86_CR0_NW | X86_CR0_CD)
+#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST X86_CR0_NE
+#define KVM_VM_CR0_ALWAYS_ON				\
+	(KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | 	\
+	 X86_CR0_WP | X86_CR0_PG | X86_CR0_PE)
+#define KVM_CR4_GUEST_OWNED_BITS				      \
+	(X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR      \
+	 | X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_TSD)
+
+#define KVM_VM_CR4_ALWAYS_ON_UNRESTRICTED_GUEST X86_CR4_VMXE
+#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
+#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
+
+#define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM))
+
+#define MSR_IA32_RTIT_STATUS_MASK (~(RTIT_STATUS_FILTEREN | \
+	RTIT_STATUS_CONTEXTEN | RTIT_STATUS_TRIGGEREN | \
+	RTIT_STATUS_ERROR | RTIT_STATUS_STOPPED | \
+	RTIT_STATUS_BYTECNT))
+
+#define MSR_IA32_RTIT_OUTPUT_BASE_MASK \
+	(~((1UL << cpuid_query_maxphyaddr(vcpu)) - 1) | 0x7f)
+
+/*
+ * These 2 parameters are used to config the controls for Pause-Loop Exiting:
+ * ple_gap:    upper bound on the amount of time between two successive
+ *             executions of PAUSE in a loop. Also indicate if ple enabled.
+ *             According to test, this time is usually smaller than 128 cycles.
+ * ple_window: upper bound on the amount of time a guest is allowed to execute
+ *             in a PAUSE loop. Tests indicate that most spinlocks are held for
+ *             less than 2^12 cycles
+ * Time is measured based on a counter that runs at the same rate as the TSC,
+ * refer SDM volume 3b section 21.6.13 & 22.1.3.
+ */
+static unsigned int ple_gap = KVM_DEFAULT_PLE_GAP;
+module_param(ple_gap, uint, 0444);
+
+static unsigned int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
+module_param(ple_window, uint, 0444);
+
+/* Default doubles per-vcpu window every exit. */
+static unsigned int ple_window_grow = KVM_DEFAULT_PLE_WINDOW_GROW;
+module_param(ple_window_grow, uint, 0444);
+
+/* Default resets per-vcpu window every exit to ple_window. */
+static unsigned int ple_window_shrink = KVM_DEFAULT_PLE_WINDOW_SHRINK;
+module_param(ple_window_shrink, uint, 0444);
+
+/* Default is to compute the maximum so we can never overflow. */
+static unsigned int ple_window_max        = KVM_VMX_DEFAULT_PLE_WINDOW_MAX;
+module_param(ple_window_max, uint, 0444);
+
+/* Default is SYSTEM mode, 1 for host-guest mode */
+int __read_mostly pt_mode = PT_MODE_SYSTEM;
+module_param(pt_mode, int, S_IRUGO);
+
+static DEFINE_STATIC_KEY_FALSE(vmx_l1d_should_flush);
+static DEFINE_STATIC_KEY_FALSE(vmx_l1d_flush_cond);
+static DEFINE_MUTEX(vmx_l1d_flush_mutex);
+
+/* Storage for pre module init parameter parsing */
+static enum vmx_l1d_flush_state __read_mostly vmentry_l1d_flush_param = VMENTER_L1D_FLUSH_AUTO;
+
+static const struct {
+	const char *option;
+	bool for_parse;
+} vmentry_l1d_param[] = {
+	[VMENTER_L1D_FLUSH_AUTO]	 = {"auto", true},
+	[VMENTER_L1D_FLUSH_NEVER]	 = {"never", true},
+	[VMENTER_L1D_FLUSH_COND]	 = {"cond", true},
+	[VMENTER_L1D_FLUSH_ALWAYS]	 = {"always", true},
+	[VMENTER_L1D_FLUSH_EPT_DISABLED] = {"EPT disabled", false},
+	[VMENTER_L1D_FLUSH_NOT_REQUIRED] = {"not required", false},
+};
+
+#define L1D_CACHE_ORDER 4
+static void *vmx_l1d_flush_pages;
+
+static int vmx_setup_l1d_flush(enum vmx_l1d_flush_state l1tf)
+{
+	struct page *page;
+	unsigned int i;
+
+	if (!boot_cpu_has_bug(X86_BUG_L1TF)) {
+		l1tf_vmx_mitigation = VMENTER_L1D_FLUSH_NOT_REQUIRED;
+		return 0;
+	}
+
+	if (!enable_ept) {
+		l1tf_vmx_mitigation = VMENTER_L1D_FLUSH_EPT_DISABLED;
+		return 0;
+	}
+
+	if (boot_cpu_has(X86_FEATURE_ARCH_CAPABILITIES)) {
+		u64 msr;
+
+		rdmsrl(MSR_IA32_ARCH_CAPABILITIES, msr);
+		if (msr & ARCH_CAP_SKIP_VMENTRY_L1DFLUSH) {
+			l1tf_vmx_mitigation = VMENTER_L1D_FLUSH_NOT_REQUIRED;
+			return 0;
+		}
+	}
+
+	/* If set to auto use the default l1tf mitigation method */
+	if (l1tf == VMENTER_L1D_FLUSH_AUTO) {
+		switch (l1tf_mitigation) {
+		case L1TF_MITIGATION_OFF:
+			l1tf = VMENTER_L1D_FLUSH_NEVER;
+			break;
+		case L1TF_MITIGATION_FLUSH_NOWARN:
+		case L1TF_MITIGATION_FLUSH:
+		case L1TF_MITIGATION_FLUSH_NOSMT:
+			l1tf = VMENTER_L1D_FLUSH_COND;
+			break;
+		case L1TF_MITIGATION_FULL:
+		case L1TF_MITIGATION_FULL_FORCE:
+			l1tf = VMENTER_L1D_FLUSH_ALWAYS;
+			break;
+		}
+	} else if (l1tf_mitigation == L1TF_MITIGATION_FULL_FORCE) {
+		l1tf = VMENTER_L1D_FLUSH_ALWAYS;
+	}
+
+	if (l1tf != VMENTER_L1D_FLUSH_NEVER && !vmx_l1d_flush_pages &&
+	    !boot_cpu_has(X86_FEATURE_FLUSH_L1D)) {
+		/*
+		 * This allocation for vmx_l1d_flush_pages is not tied to a VM
+		 * lifetime and so should not be charged to a memcg.
+		 */
+		page = alloc_pages(GFP_KERNEL, L1D_CACHE_ORDER);
+		if (!page)
+			return -ENOMEM;
+		vmx_l1d_flush_pages = page_address(page);
+
+		/*
+		 * Initialize each page with a different pattern in
+		 * order to protect against KSM in the nested
+		 * virtualization case.
+		 */
+		for (i = 0; i < 1u << L1D_CACHE_ORDER; ++i) {
+			memset(vmx_l1d_flush_pages + i * PAGE_SIZE, i + 1,
+			       PAGE_SIZE);
+		}
+	}
+
+	l1tf_vmx_mitigation = l1tf;
+
+	if (l1tf != VMENTER_L1D_FLUSH_NEVER)
+		static_branch_enable(&vmx_l1d_should_flush);
+	else
+		static_branch_disable(&vmx_l1d_should_flush);
+
+	if (l1tf == VMENTER_L1D_FLUSH_COND)
+		static_branch_enable(&vmx_l1d_flush_cond);
+	else
+		static_branch_disable(&vmx_l1d_flush_cond);
+	return 0;
+}
+
+static int vmentry_l1d_flush_parse(const char *s)
+{
+	unsigned int i;
+
+	if (s) {
+		for (i = 0; i < ARRAY_SIZE(vmentry_l1d_param); i++) {
+			if (vmentry_l1d_param[i].for_parse &&
+			    sysfs_streq(s, vmentry_l1d_param[i].option))
+				return i;
+		}
+	}
+	return -EINVAL;
+}
+
+static int vmentry_l1d_flush_set(const char *s, const struct kernel_param *kp)
+{
+	int l1tf, ret;
+
+	l1tf = vmentry_l1d_flush_parse(s);
+	if (l1tf < 0)
+		return l1tf;
+
+	if (!boot_cpu_has(X86_BUG_L1TF))
+		return 0;
+
+	/*
+	 * Has vmx_init() run already? If not then this is the pre init
+	 * parameter parsing. In that case just store the value and let
+	 * vmx_init() do the proper setup after enable_ept has been
+	 * established.
+	 */
+	if (l1tf_vmx_mitigation == VMENTER_L1D_FLUSH_AUTO) {
+		vmentry_l1d_flush_param = l1tf;
+		return 0;
+	}
+
+	mutex_lock(&vmx_l1d_flush_mutex);
+	ret = vmx_setup_l1d_flush(l1tf);
+	mutex_unlock(&vmx_l1d_flush_mutex);
+	return ret;
+}
+
+static int vmentry_l1d_flush_get(char *s, const struct kernel_param *kp)
+{
+	if (WARN_ON_ONCE(l1tf_vmx_mitigation >= ARRAY_SIZE(vmentry_l1d_param)))
+		return sprintf(s, "???\n");
+
+	return sprintf(s, "%s\n", vmentry_l1d_param[l1tf_vmx_mitigation].option);
+}
+
+static const struct kernel_param_ops vmentry_l1d_flush_ops = {
+	.set = vmentry_l1d_flush_set,
+	.get = vmentry_l1d_flush_get,
+};
+module_param_cb(vmentry_l1d_flush, &vmentry_l1d_flush_ops, NULL, 0644);
+
+static bool guest_state_valid(struct kvm_vcpu *vcpu);
+static u32 vmx_segment_access_rights(struct kvm_segment *var);
+static __always_inline void vmx_disable_intercept_for_msr(unsigned long *msr_bitmap,
+							  u32 msr, int type);
+
+void vmx_vmexit(void);
+
+#define vmx_insn_failed(fmt...)		\
+do {					\
+	WARN_ONCE(1, fmt);		\
+	pr_warn_ratelimited(fmt);	\
+} while (0)
+
+asmlinkage void vmread_error(unsigned long field, bool fault)
+{
+	if (fault)
+		kvm_spurious_fault();
+	else
+		vmx_insn_failed("kvm: vmread failed: field=%lx\n", field);
+}
+
+noinline void vmwrite_error(unsigned long field, unsigned long value)
+{
+	vmx_insn_failed("kvm: vmwrite failed: field=%lx val=%lx err=%d\n",
+			field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
+}
+
+noinline void vmclear_error(struct vmcs *vmcs, u64 phys_addr)
+{
+	vmx_insn_failed("kvm: vmclear failed: %p/%llx\n", vmcs, phys_addr);
+}
+
+noinline void vmptrld_error(struct vmcs *vmcs, u64 phys_addr)
+{
+	vmx_insn_failed("kvm: vmptrld failed: %p/%llx\n", vmcs, phys_addr);
+}
+
+noinline void invvpid_error(unsigned long ext, u16 vpid, gva_t gva)
+{
+	vmx_insn_failed("kvm: invvpid failed: ext=0x%lx vpid=%u gva=0x%lx\n",
+			ext, vpid, gva);
+}
+
+noinline void invept_error(unsigned long ext, u64 eptp, gpa_t gpa)
+{
+	vmx_insn_failed("kvm: invept failed: ext=0x%lx eptp=%llx gpa=0x%llx\n",
+			ext, eptp, gpa);
+}
+
+static DEFINE_PER_CPU(struct vmcs *, vmxarea);
+DEFINE_PER_CPU(struct vmcs *, current_vmcs);
+/*
+ * We maintain a per-CPU linked-list of VMCS loaded on that CPU. This is needed
+ * when a CPU is brought down, and we need to VMCLEAR all VMCSs loaded on it.
+ */
+static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu);
+
+/*
+ * We maintian a per-CPU linked-list of vCPU, so in wakeup_handler() we
+ * can find which vCPU should be waken up.
+ */
+static DEFINE_PER_CPU(struct list_head, blocked_vcpu_on_cpu);
+static DEFINE_PER_CPU(spinlock_t, blocked_vcpu_on_cpu_lock);
+
+static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
+static DEFINE_SPINLOCK(vmx_vpid_lock);
+
+struct vmcs_config vmcs_config;
+struct vmx_capability vmx_capability;
+
+#define VMX_SEGMENT_FIELD(seg)					\
+	[VCPU_SREG_##seg] = {                                   \
+		.selector = GUEST_##seg##_SELECTOR,		\
+		.base = GUEST_##seg##_BASE,		   	\
+		.limit = GUEST_##seg##_LIMIT,		   	\
+		.ar_bytes = GUEST_##seg##_AR_BYTES,	   	\
+	}
+
+static const struct kvm_vmx_segment_field {
+	unsigned selector;
+	unsigned base;
+	unsigned limit;
+	unsigned ar_bytes;
+} kvm_vmx_segment_fields[] = {
+	VMX_SEGMENT_FIELD(CS),
+	VMX_SEGMENT_FIELD(DS),
+	VMX_SEGMENT_FIELD(ES),
+	VMX_SEGMENT_FIELD(FS),
+	VMX_SEGMENT_FIELD(GS),
+	VMX_SEGMENT_FIELD(SS),
+	VMX_SEGMENT_FIELD(TR),
+	VMX_SEGMENT_FIELD(LDTR),
+};
+
+u64 host_efer;
+static unsigned long host_idt_base;
+
+/*
+ * Though SYSCALL is only supported in 64-bit mode on Intel CPUs, kvm
+ * will emulate SYSCALL in legacy mode if the vendor string in guest
+ * CPUID.0:{EBX,ECX,EDX} is "AuthenticAMD" or "AMDisbetter!" To
+ * support this emulation, IA32_STAR must always be included in
+ * vmx_msr_index[], even in i386 builds.
+ */
+const u32 vmx_msr_index[] = {
+#ifdef CONFIG_X86_64
+	MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR,
+#endif
+	MSR_EFER, MSR_TSC_AUX, MSR_STAR,
+	MSR_IA32_TSX_CTRL,
+};
+
+#if IS_ENABLED(CONFIG_HYPERV)
+static bool __read_mostly enlightened_vmcs = true;
+module_param(enlightened_vmcs, bool, 0444);
+
+/* check_ept_pointer() should be under protection of ept_pointer_lock. */
+static void check_ept_pointer_match(struct kvm *kvm)
+{
+	struct kvm_vcpu *vcpu;
+	u64 tmp_eptp = INVALID_PAGE;
+	int i;
+
+	kvm_for_each_vcpu(i, vcpu, kvm) {
+		if (!VALID_PAGE(tmp_eptp)) {
+			tmp_eptp = to_vmx(vcpu)->ept_pointer;
+		} else if (tmp_eptp != to_vmx(vcpu)->ept_pointer) {
+			to_kvm_vmx(kvm)->ept_pointers_match
+				= EPT_POINTERS_MISMATCH;
+			return;
+		}
+	}
+
+	to_kvm_vmx(kvm)->ept_pointers_match = EPT_POINTERS_MATCH;
+}
+
+static int kvm_fill_hv_flush_list_func(struct hv_guest_mapping_flush_list *flush,
+		void *data)
+{
+	struct kvm_tlb_range *range = data;
+
+	return hyperv_fill_flush_guest_mapping_list(flush, range->start_gfn,
+			range->pages);
+}
+
+static inline int __hv_remote_flush_tlb_with_range(struct kvm *kvm,
+		struct kvm_vcpu *vcpu, struct kvm_tlb_range *range)
+{
+	u64 ept_pointer = to_vmx(vcpu)->ept_pointer;
+
+	/*
+	 * FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE hypercall needs address
+	 * of the base of EPT PML4 table, strip off EPT configuration
+	 * information.
+	 */
+	if (range)
+		return hyperv_flush_guest_mapping_range(ept_pointer & PAGE_MASK,
+				kvm_fill_hv_flush_list_func, (void *)range);
+	else
+		return hyperv_flush_guest_mapping(ept_pointer & PAGE_MASK);
+}
+
+static int hv_remote_flush_tlb_with_range(struct kvm *kvm,
+		struct kvm_tlb_range *range)
+{
+	struct kvm_vcpu *vcpu;
+	int ret = 0, i;
+
+	spin_lock(&to_kvm_vmx(kvm)->ept_pointer_lock);
+
+	if (to_kvm_vmx(kvm)->ept_pointers_match == EPT_POINTERS_CHECK)
+		check_ept_pointer_match(kvm);
+
+	if (to_kvm_vmx(kvm)->ept_pointers_match != EPT_POINTERS_MATCH) {
+		kvm_for_each_vcpu(i, vcpu, kvm) {
+			/* If ept_pointer is invalid pointer, bypass flush request. */
+			if (VALID_PAGE(to_vmx(vcpu)->ept_pointer))
+				ret |= __hv_remote_flush_tlb_with_range(
+					kvm, vcpu, range);
+		}
+	} else {
+		ret = __hv_remote_flush_tlb_with_range(kvm,
+				kvm_get_vcpu(kvm, 0), range);
+	}
+
+	spin_unlock(&to_kvm_vmx(kvm)->ept_pointer_lock);
+	return ret;
+}
+static int hv_remote_flush_tlb(struct kvm *kvm)
+{
+	return hv_remote_flush_tlb_with_range(kvm, NULL);
+}
+
+static int hv_enable_direct_tlbflush(struct kvm_vcpu *vcpu)
+{
+	struct hv_enlightened_vmcs *evmcs;
+	struct hv_partition_assist_pg **p_hv_pa_pg =
+			&vcpu->kvm->arch.hyperv.hv_pa_pg;
+	/*
+	 * Synthetic VM-Exit is not enabled in current code and so All
+	 * evmcs in singe VM shares same assist page.
+	 */
+	if (!*p_hv_pa_pg)
+		*p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL);
+
+	if (!*p_hv_pa_pg)
+		return -ENOMEM;
+
+	evmcs = (struct hv_enlightened_vmcs *)to_vmx(vcpu)->loaded_vmcs->vmcs;
+
+	evmcs->partition_assist_page =
+		__pa(*p_hv_pa_pg);
+	evmcs->hv_vm_id = (unsigned long)vcpu->kvm;
+	evmcs->hv_enlightenments_control.nested_flush_hypercall = 1;
+
+	return 0;
+}
+
+#endif /* IS_ENABLED(CONFIG_HYPERV) */
+
+/*
+ * Comment's format: document - errata name - stepping - processor name.
+ * Refer from
+ * https://www.virtualbox.org/svn/vbox/trunk/src/VBox/VMM/VMMR0/HMR0.cpp
+ */
+static u32 vmx_preemption_cpu_tfms[] = {
+/* 323344.pdf - BA86   - D0 - Xeon 7500 Series */
+0x000206E6,
+/* 323056.pdf - AAX65  - C2 - Xeon L3406 */
+/* 322814.pdf - AAT59  - C2 - i7-600, i5-500, i5-400 and i3-300 Mobile */
+/* 322911.pdf - AAU65  - C2 - i5-600, i3-500 Desktop and Pentium G6950 */
+0x00020652,
+/* 322911.pdf - AAU65  - K0 - i5-600, i3-500 Desktop and Pentium G6950 */
+0x00020655,
+/* 322373.pdf - AAO95  - B1 - Xeon 3400 Series */
+/* 322166.pdf - AAN92  - B1 - i7-800 and i5-700 Desktop */
+/*
+ * 320767.pdf - AAP86  - B1 -
+ * i7-900 Mobile Extreme, i7-800 and i7-700 Mobile
+ */
+0x000106E5,
+/* 321333.pdf - AAM126 - C0 - Xeon 3500 */
+0x000106A0,
+/* 321333.pdf - AAM126 - C1 - Xeon 3500 */
+0x000106A1,
+/* 320836.pdf - AAJ124 - C0 - i7-900 Desktop Extreme and i7-900 Desktop */
+0x000106A4,
+ /* 321333.pdf - AAM126 - D0 - Xeon 3500 */
+ /* 321324.pdf - AAK139 - D0 - Xeon 5500 */
+ /* 320836.pdf - AAJ124 - D0 - i7-900 Extreme and i7-900 Desktop */
+0x000106A5,
+ /* Xeon E3-1220 V2 */
+0x000306A8,
+};
+
+static inline bool cpu_has_broken_vmx_preemption_timer(void)
+{
+	u32 eax = cpuid_eax(0x00000001), i;
+
+	/* Clear the reserved bits */
+	eax &= ~(0x3U << 14 | 0xfU << 28);
+	for (i = 0; i < ARRAY_SIZE(vmx_preemption_cpu_tfms); i++)
+		if (eax == vmx_preemption_cpu_tfms[i])
+			return true;
+
+	return false;
+}
+
+static inline bool cpu_need_virtualize_apic_accesses(struct kvm_vcpu *vcpu)
+{
+	return flexpriority_enabled && lapic_in_kernel(vcpu);
+}
+
+static inline bool report_flexpriority(void)
+{
+	return flexpriority_enabled;
+}
+
+static inline int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
+{
+	int i;
+
+	for (i = 0; i < vmx->nmsrs; ++i)
+		if (vmx_msr_index[vmx->guest_msrs[i].index] == msr)
+			return i;
+	return -1;
+}
+
+struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
+{
+	int i;
+
+	i = __find_msr_index(vmx, msr);
+	if (i >= 0)
+		return &vmx->guest_msrs[i];
+	return NULL;
+}
+
+static int vmx_set_guest_msr(struct vcpu_vmx *vmx, struct shared_msr_entry *msr, u64 data)
+{
+	int ret = 0;
+
+	u64 old_msr_data = msr->data;
+	msr->data = data;
+	if (msr - vmx->guest_msrs < vmx->save_nmsrs) {
+		preempt_disable();
+		ret = kvm_set_shared_msr(msr->index, msr->data,
+					 msr->mask);
+		preempt_enable();
+		if (ret)
+			msr->data = old_msr_data;
+	}
+	return ret;
+}
+
+void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs)
+{
+	vmcs_clear(loaded_vmcs->vmcs);
+	if (loaded_vmcs->shadow_vmcs && loaded_vmcs->launched)
+		vmcs_clear(loaded_vmcs->shadow_vmcs);
+	loaded_vmcs->cpu = -1;
+	loaded_vmcs->launched = 0;
+}
+
+#ifdef CONFIG_KEXEC_CORE
+/*
+ * This bitmap is used to indicate whether the vmclear
+ * operation is enabled on all cpus. All disabled by
+ * default.
+ */
+static cpumask_t crash_vmclear_enabled_bitmap = CPU_MASK_NONE;
+
+static inline void crash_enable_local_vmclear(int cpu)
+{
+	cpumask_set_cpu(cpu, &crash_vmclear_enabled_bitmap);
+}
+
+static inline void crash_disable_local_vmclear(int cpu)
+{
+	cpumask_clear_cpu(cpu, &crash_vmclear_enabled_bitmap);
+}
+
+static inline int crash_local_vmclear_enabled(int cpu)
+{
+	return cpumask_test_cpu(cpu, &crash_vmclear_enabled_bitmap);
+}
+
+static void crash_vmclear_local_loaded_vmcss(void)
+{
+	int cpu = raw_smp_processor_id();
+	struct loaded_vmcs *v;
+
+	if (!crash_local_vmclear_enabled(cpu))
+		return;
+
+	list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu),
+			    loaded_vmcss_on_cpu_link)
+		vmcs_clear(v->vmcs);
+}
+#else
+static inline void crash_enable_local_vmclear(int cpu) { }
+static inline void crash_disable_local_vmclear(int cpu) { }
+#endif /* CONFIG_KEXEC_CORE */
+
+static void __loaded_vmcs_clear(void *arg)
+{
+	struct loaded_vmcs *loaded_vmcs = arg;
+	int cpu = raw_smp_processor_id();
+
+	if (loaded_vmcs->cpu != cpu)
+		return; /* vcpu migration can race with cpu offline */
+	if (per_cpu(current_vmcs, cpu) == loaded_vmcs->vmcs)
+		per_cpu(current_vmcs, cpu) = NULL;
+	crash_disable_local_vmclear(cpu);
+	list_del(&loaded_vmcs->loaded_vmcss_on_cpu_link);
+
+	/*
+	 * we should ensure updating loaded_vmcs->loaded_vmcss_on_cpu_link
+	 * is before setting loaded_vmcs->vcpu to -1 which is done in
+	 * loaded_vmcs_init. Otherwise, other cpu can see vcpu = -1 fist
+	 * then adds the vmcs into percpu list before it is deleted.
+	 */
+	smp_wmb();
+
+	loaded_vmcs_init(loaded_vmcs);
+	crash_enable_local_vmclear(cpu);
+}
+
+void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs)
+{
+	int cpu = loaded_vmcs->cpu;
+
+	if (cpu != -1)
+		smp_call_function_single(cpu,
+			 __loaded_vmcs_clear, loaded_vmcs, 1);
+}
+
+static bool vmx_segment_cache_test_set(struct vcpu_vmx *vmx, unsigned seg,
+				       unsigned field)
+{
+	bool ret;
+	u32 mask = 1 << (seg * SEG_FIELD_NR + field);
+
+	if (!kvm_register_is_available(&vmx->vcpu, VCPU_EXREG_SEGMENTS)) {
+		kvm_register_mark_available(&vmx->vcpu, VCPU_EXREG_SEGMENTS);
+		vmx->segment_cache.bitmask = 0;
+	}
+	ret = vmx->segment_cache.bitmask & mask;
+	vmx->segment_cache.bitmask |= mask;
+	return ret;
+}
+
+static u16 vmx_read_guest_seg_selector(struct vcpu_vmx *vmx, unsigned seg)
+{
+	u16 *p = &vmx->segment_cache.seg[seg].selector;
+
+	if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_SEL))
+		*p = vmcs_read16(kvm_vmx_segment_fields[seg].selector);
+	return *p;
+}
+
+static ulong vmx_read_guest_seg_base(struct vcpu_vmx *vmx, unsigned seg)
+{
+	ulong *p = &vmx->segment_cache.seg[seg].base;
+
+	if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_BASE))
+		*p = vmcs_readl(kvm_vmx_segment_fields[seg].base);
+	return *p;
+}
+
+static u32 vmx_read_guest_seg_limit(struct vcpu_vmx *vmx, unsigned seg)
+{
+	u32 *p = &vmx->segment_cache.seg[seg].limit;
+
+	if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_LIMIT))
+		*p = vmcs_read32(kvm_vmx_segment_fields[seg].limit);
+	return *p;
+}
+
+static u32 vmx_read_guest_seg_ar(struct vcpu_vmx *vmx, unsigned seg)
+{
+	u32 *p = &vmx->segment_cache.seg[seg].ar;
+
+	if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_AR))
+		*p = vmcs_read32(kvm_vmx_segment_fields[seg].ar_bytes);
+	return *p;
+}
+
+void update_exception_bitmap(struct kvm_vcpu *vcpu)
+{
+	u32 eb;
+
+	eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
+	     (1u << DB_VECTOR) | (1u << AC_VECTOR);
+	/*
+	 * Guest access to VMware backdoor ports could legitimately
+	 * trigger #GP because of TSS I/O permission bitmap.
+	 * We intercept those #GP and allow access to them anyway
+	 * as VMware does.
+	 */
+	if (enable_vmware_backdoor)
+		eb |= (1u << GP_VECTOR);
+	if ((vcpu->guest_debug &
+	     (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
+	    (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
+		eb |= 1u << BP_VECTOR;
+	if (to_vmx(vcpu)->rmode.vm86_active)
+		eb = ~0;
+	if (enable_ept)
+		eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
+
+	/* When we are running a nested L2 guest and L1 specified for it a
+	 * certain exception bitmap, we must trap the same exceptions and pass
+	 * them to L1. When running L2, we will only handle the exceptions
+	 * specified above if L1 did not want them.
+	 */
+	if (is_guest_mode(vcpu))
+		eb |= get_vmcs12(vcpu)->exception_bitmap;
+
+	vmcs_write32(EXCEPTION_BITMAP, eb);
+}
+
+/*
+ * Check if MSR is intercepted for currently loaded MSR bitmap.
+ */
+static bool msr_write_intercepted(struct kvm_vcpu *vcpu, u32 msr)
+{
+	unsigned long *msr_bitmap;
+	int f = sizeof(unsigned long);
+
+	if (!cpu_has_vmx_msr_bitmap())
+		return true;
+
+	msr_bitmap = to_vmx(vcpu)->loaded_vmcs->msr_bitmap;
+
+	if (msr <= 0x1fff) {
+		return !!test_bit(msr, msr_bitmap + 0x800 / f);
+	} else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
+		msr &= 0x1fff;
+		return !!test_bit(msr, msr_bitmap + 0xc00 / f);
+	}
+
+	return true;
+}
+
+static void clear_atomic_switch_msr_special(struct vcpu_vmx *vmx,
+		unsigned long entry, unsigned long exit)
+{
+	vm_entry_controls_clearbit(vmx, entry);
+	vm_exit_controls_clearbit(vmx, exit);
+}
+
+int vmx_find_msr_index(struct vmx_msrs *m, u32 msr)
+{
+	unsigned int i;
+
+	for (i = 0; i < m->nr; ++i) {
+		if (m->val[i].index == msr)
+			return i;
+	}
+	return -ENOENT;
+}
+
+static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr)
+{
+	int i;
+	struct msr_autoload *m = &vmx->msr_autoload;
+
+	switch (msr) {
+	case MSR_EFER:
+		if (cpu_has_load_ia32_efer()) {
+			clear_atomic_switch_msr_special(vmx,
+					VM_ENTRY_LOAD_IA32_EFER,
+					VM_EXIT_LOAD_IA32_EFER);
+			return;
+		}
+		break;
+	case MSR_CORE_PERF_GLOBAL_CTRL:
+		if (cpu_has_load_perf_global_ctrl()) {
+			clear_atomic_switch_msr_special(vmx,
+					VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL,
+					VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL);
+			return;
+		}
+		break;
+	}
+	i = vmx_find_msr_index(&m->guest, msr);
+	if (i < 0)
+		goto skip_guest;
+	--m->guest.nr;
+	m->guest.val[i] = m->guest.val[m->guest.nr];
+	vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->guest.nr);
+
+skip_guest:
+	i = vmx_find_msr_index(&m->host, msr);
+	if (i < 0)
+		return;
+
+	--m->host.nr;
+	m->host.val[i] = m->host.val[m->host.nr];
+	vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->host.nr);
+}
+
+static void add_atomic_switch_msr_special(struct vcpu_vmx *vmx,
+		unsigned long entry, unsigned long exit,
+		unsigned long guest_val_vmcs, unsigned long host_val_vmcs,
+		u64 guest_val, u64 host_val)
+{
+	vmcs_write64(guest_val_vmcs, guest_val);
+	if (host_val_vmcs != HOST_IA32_EFER)
+		vmcs_write64(host_val_vmcs, host_val);
+	vm_entry_controls_setbit(vmx, entry);
+	vm_exit_controls_setbit(vmx, exit);
+}
+
+static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
+				  u64 guest_val, u64 host_val, bool entry_only)
+{
+	int i, j = 0;
+	struct msr_autoload *m = &vmx->msr_autoload;
+
+	switch (msr) {
+	case MSR_EFER:
+		if (cpu_has_load_ia32_efer()) {
+			add_atomic_switch_msr_special(vmx,
+					VM_ENTRY_LOAD_IA32_EFER,
+					VM_EXIT_LOAD_IA32_EFER,
+					GUEST_IA32_EFER,
+					HOST_IA32_EFER,
+					guest_val, host_val);
+			return;
+		}
+		break;
+	case MSR_CORE_PERF_GLOBAL_CTRL:
+		if (cpu_has_load_perf_global_ctrl()) {
+			add_atomic_switch_msr_special(vmx,
+					VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL,
+					VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL,
+					GUEST_IA32_PERF_GLOBAL_CTRL,
+					HOST_IA32_PERF_GLOBAL_CTRL,
+					guest_val, host_val);
+			return;
+		}
+		break;
+	case MSR_IA32_PEBS_ENABLE:
+		/* PEBS needs a quiescent period after being disabled (to write
+		 * a record).  Disabling PEBS through VMX MSR swapping doesn't
+		 * provide that period, so a CPU could write host's record into
+		 * guest's memory.
+		 */
+		wrmsrl(MSR_IA32_PEBS_ENABLE, 0);
+	}
+
+	i = vmx_find_msr_index(&m->guest, msr);
+	if (!entry_only)
+		j = vmx_find_msr_index(&m->host, msr);
+
+	if ((i < 0 && m->guest.nr == NR_LOADSTORE_MSRS) ||
+		(j < 0 &&  m->host.nr == NR_LOADSTORE_MSRS)) {
+		printk_once(KERN_WARNING "Not enough msr switch entries. "
+				"Can't add msr %x\n", msr);
+		return;
+	}
+	if (i < 0) {
+		i = m->guest.nr++;
+		vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->guest.nr);
+	}
+	m->guest.val[i].index = msr;
+	m->guest.val[i].value = guest_val;
+
+	if (entry_only)
+		return;
+
+	if (j < 0) {
+		j = m->host.nr++;
+		vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->host.nr);
+	}
+	m->host.val[j].index = msr;
+	m->host.val[j].value = host_val;
+}
+
+static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset)
+{
+	u64 guest_efer = vmx->vcpu.arch.efer;
+	u64 ignore_bits = 0;
+
+	/* Shadow paging assumes NX to be available.  */
+	if (!enable_ept)
+		guest_efer |= EFER_NX;
+
+	/*
+	 * LMA and LME handled by hardware; SCE meaningless outside long mode.
+	 */
+	ignore_bits |= EFER_SCE;
+#ifdef CONFIG_X86_64
+	ignore_bits |= EFER_LMA | EFER_LME;
+	/* SCE is meaningful only in long mode on Intel */
+	if (guest_efer & EFER_LMA)
+		ignore_bits &= ~(u64)EFER_SCE;
+#endif
+
+	/*
+	 * On EPT, we can't emulate NX, so we must switch EFER atomically.
+	 * On CPUs that support "load IA32_EFER", always switch EFER
+	 * atomically, since it's faster than switching it manually.
+	 */
+	if (cpu_has_load_ia32_efer() ||
+	    (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX))) {
+		if (!(guest_efer & EFER_LMA))
+			guest_efer &= ~EFER_LME;
+		if (guest_efer != host_efer)
+			add_atomic_switch_msr(vmx, MSR_EFER,
+					      guest_efer, host_efer, false);
+		else
+			clear_atomic_switch_msr(vmx, MSR_EFER);
+		return false;
+	} else {
+		clear_atomic_switch_msr(vmx, MSR_EFER);
+
+		guest_efer &= ~ignore_bits;
+		guest_efer |= host_efer & ignore_bits;
+
+		vmx->guest_msrs[efer_offset].data = guest_efer;
+		vmx->guest_msrs[efer_offset].mask = ~ignore_bits;
+
+		return true;
+	}
+}
+
+#ifdef CONFIG_X86_32
+/*
+ * On 32-bit kernels, VM exits still load the FS and GS bases from the
+ * VMCS rather than the segment table.  KVM uses this helper to figure
+ * out the current bases to poke them into the VMCS before entry.
+ */
+static unsigned long segment_base(u16 selector)
+{
+	struct desc_struct *table;
+	unsigned long v;
+
+	if (!(selector & ~SEGMENT_RPL_MASK))
+		return 0;
+
+	table = get_current_gdt_ro();
+
+	if ((selector & SEGMENT_TI_MASK) == SEGMENT_LDT) {
+		u16 ldt_selector = kvm_read_ldt();
+
+		if (!(ldt_selector & ~SEGMENT_RPL_MASK))
+			return 0;
+
+		table = (struct desc_struct *)segment_base(ldt_selector);
+	}
+	v = get_desc_base(&table[selector >> 3]);
+	return v;
+}
+#endif
+
+static inline void pt_load_msr(struct pt_ctx *ctx, u32 addr_range)
+{
+	u32 i;
+
+	wrmsrl(MSR_IA32_RTIT_STATUS, ctx->status);
+	wrmsrl(MSR_IA32_RTIT_OUTPUT_BASE, ctx->output_base);
+	wrmsrl(MSR_IA32_RTIT_OUTPUT_MASK, ctx->output_mask);
+	wrmsrl(MSR_IA32_RTIT_CR3_MATCH, ctx->cr3_match);
+	for (i = 0; i < addr_range; i++) {
+		wrmsrl(MSR_IA32_RTIT_ADDR0_A + i * 2, ctx->addr_a[i]);
+		wrmsrl(MSR_IA32_RTIT_ADDR0_B + i * 2, ctx->addr_b[i]);
+	}
+}
+
+static inline void pt_save_msr(struct pt_ctx *ctx, u32 addr_range)
+{
+	u32 i;
+
+	rdmsrl(MSR_IA32_RTIT_STATUS, ctx->status);
+	rdmsrl(MSR_IA32_RTIT_OUTPUT_BASE, ctx->output_base);
+	rdmsrl(MSR_IA32_RTIT_OUTPUT_MASK, ctx->output_mask);
+	rdmsrl(MSR_IA32_RTIT_CR3_MATCH, ctx->cr3_match);
+	for (i = 0; i < addr_range; i++) {
+		rdmsrl(MSR_IA32_RTIT_ADDR0_A + i * 2, ctx->addr_a[i]);
+		rdmsrl(MSR_IA32_RTIT_ADDR0_B + i * 2, ctx->addr_b[i]);
+	}
+}
+
+static void pt_guest_enter(struct vcpu_vmx *vmx)
+{
+	if (pt_mode == PT_MODE_SYSTEM)
+		return;
+
+	/*
+	 * GUEST_IA32_RTIT_CTL is already set in the VMCS.
+	 * Save host state before VM entry.
+	 */
+	rdmsrl(MSR_IA32_RTIT_CTL, vmx->pt_desc.host.ctl);
+	if (vmx->pt_desc.guest.ctl & RTIT_CTL_TRACEEN) {
+		wrmsrl(MSR_IA32_RTIT_CTL, 0);
+		pt_save_msr(&vmx->pt_desc.host, vmx->pt_desc.addr_range);
+		pt_load_msr(&vmx->pt_desc.guest, vmx->pt_desc.addr_range);
+	}
+}
+
+static void pt_guest_exit(struct vcpu_vmx *vmx)
+{
+	if (pt_mode == PT_MODE_SYSTEM)
+		return;
+
+	if (vmx->pt_desc.guest.ctl & RTIT_CTL_TRACEEN) {
+		pt_save_msr(&vmx->pt_desc.guest, vmx->pt_desc.addr_range);
+		pt_load_msr(&vmx->pt_desc.host, vmx->pt_desc.addr_range);
+	}
+
+	/* Reload host state (IA32_RTIT_CTL will be cleared on VM exit). */
+	wrmsrl(MSR_IA32_RTIT_CTL, vmx->pt_desc.host.ctl);
+}
+
+void vmx_set_host_fs_gs(struct vmcs_host_state *host, u16 fs_sel, u16 gs_sel,
+			unsigned long fs_base, unsigned long gs_base)
+{
+	if (unlikely(fs_sel != host->fs_sel)) {
+		if (!(fs_sel & 7))
+			vmcs_write16(HOST_FS_SELECTOR, fs_sel);
+		else
+			vmcs_write16(HOST_FS_SELECTOR, 0);
+		host->fs_sel = fs_sel;
+	}
+	if (unlikely(gs_sel != host->gs_sel)) {
+		if (!(gs_sel & 7))
+			vmcs_write16(HOST_GS_SELECTOR, gs_sel);
+		else
+			vmcs_write16(HOST_GS_SELECTOR, 0);
+		host->gs_sel = gs_sel;
+	}
+	if (unlikely(fs_base != host->fs_base)) {
+		vmcs_writel(HOST_FS_BASE, fs_base);
+		host->fs_base = fs_base;
+	}
+	if (unlikely(gs_base != host->gs_base)) {
+		vmcs_writel(HOST_GS_BASE, gs_base);
+		host->gs_base = gs_base;
+	}
+}
+
+void vmx_prepare_switch_to_guest(struct kvm_vcpu *vcpu)
+{
+	struct vcpu_vmx *vmx = to_vmx(vcpu);
+	struct vmcs_host_state *host_state;
+#ifdef CONFIG_X86_64
+	int cpu = raw_smp_processor_id();
+#endif
+	unsigned long fs_base, gs_base;
+	u16 fs_sel, gs_sel;
+	int i;
+
+	vmx->req_immediate_exit = false;
+
+	/*
+	 * Note that guest MSRs to be saved/restored can also be changed
+	 * when guest state is loaded. This happens when guest transitions
+	 * to/from long-mode by setting MSR_EFER.LMA.
+	 */
+	if (!vmx->guest_msrs_ready) {
+		vmx->guest_msrs_ready = true;
+		for (i = 0; i < vmx->save_nmsrs; ++i)
+			kvm_set_shared_msr(vmx->guest_msrs[i].index,
+					   vmx->guest_msrs[i].data,
+					   vmx->guest_msrs[i].mask);
+
+	}
+	if (vmx->guest_state_loaded)
+		return;
+
+	host_state = &vmx->loaded_vmcs->host_state;
+
+	/*
+	 * Set host fs and gs selectors.  Unfortunately, 22.2.3 does not
+	 * allow segment selectors with cpl > 0 or ti == 1.
+	 */
+	host_state->ldt_sel = kvm_read_ldt();
+
+#ifdef CONFIG_X86_64
+	savesegment(ds, host_state->ds_sel);
+	savesegment(es, host_state->es_sel);
+
+	gs_base = cpu_kernelmode_gs_base(cpu);
+	if (likely(is_64bit_mm(current->mm))) {
+		save_fsgs_for_kvm();
+		fs_sel = current->thread.fsindex;
+		gs_sel = current->thread.gsindex;
+		fs_base = current->thread.fsbase;
+		vmx->msr_host_kernel_gs_base = current->thread.gsbase;
+	} else {
+		savesegment(fs, fs_sel);
+		savesegment(gs, gs_sel);
+		fs_base = read_msr(MSR_FS_BASE);
+		vmx->msr_host_kernel_gs_base = read_msr(MSR_KERNEL_GS_BASE);
+	}
+
+	wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
+#else
+	savesegment(fs, fs_sel);
+	savesegment(gs, gs_sel);
+	fs_base = segment_base(fs_sel);
+	gs_base = segment_base(gs_sel);
+#endif
+
+	vmx_set_host_fs_gs(host_state, fs_sel, gs_sel, fs_base, gs_base);
+	vmx->guest_state_loaded = true;
+}
+
+static void vmx_prepare_switch_to_host(struct vcpu_vmx *vmx)
+{
+	struct vmcs_host_state *host_state;
+
+	if (!vmx->guest_state_loaded)
+		return;
+
+	host_state = &vmx->loaded_vmcs->host_state;
+
+	++vmx->vcpu.stat.host_state_reload;
+
+#ifdef CONFIG_X86_64
+	rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
+#endif
+	if (host_state->ldt_sel || (host_state->gs_sel & 7)) {
+		kvm_load_ldt(host_state->ldt_sel);
+#ifdef CONFIG_X86_64
+		load_gs_index(host_state->gs_sel);
+#else
+		loadsegment(gs, host_state->gs_sel);
+#endif
+	}
+	if (host_state->fs_sel & 7)
+		loadsegment(fs, host_state->fs_sel);
+#ifdef CONFIG_X86_64
+	if (unlikely(host_state->ds_sel | host_state->es_sel)) {
+		loadsegment(ds, host_state->ds_sel);
+		loadsegment(es, host_state->es_sel);
+	}
+#endif
+	invalidate_tss_limit();
+#ifdef CONFIG_X86_64
+	wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
+#endif
+	load_fixmap_gdt(raw_smp_processor_id());
+	vmx->guest_state_loaded = false;
+	vmx->guest_msrs_ready = false;
+}
+
+#ifdef CONFIG_X86_64
+static u64 vmx_read_guest_kernel_gs_base(struct vcpu_vmx *vmx)
+{
+	preempt_disable();
+	if (vmx->guest_state_loaded)
+		rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
+	preempt_enable();
+	return vmx->msr_guest_kernel_gs_base;
+}
+
+static void vmx_write_guest_kernel_gs_base(struct vcpu_vmx *vmx, u64 data)
+{
+	preempt_disable();
+	if (vmx->guest_state_loaded)
+		wrmsrl(MSR_KERNEL_GS_BASE, data);
+	preempt_enable();
+	vmx->msr_guest_kernel_gs_base = data;
+}
+#endif
+
+static void vmx_vcpu_pi_load(struct kvm_vcpu *vcpu, int cpu)
+{
+	struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
+	struct pi_desc old, new;
+	unsigned int dest;
+
+	/*
+	 * In case of hot-plug or hot-unplug, we may have to undo
+	 * vmx_vcpu_pi_put even if there is no assigned device.  And we
+	 * always keep PI.NDST up to date for simplicity: it makes the
+	 * code easier, and CPU migration is not a fast path.
+	 */
+	if (!pi_test_sn(pi_desc) && vcpu->cpu == cpu)
+		return;
+
+	/*
+	 * If the 'nv' field is POSTED_INTR_WAKEUP_VECTOR, do not change
+	 * PI.NDST: pi_post_block is the one expected to change PID.NDST and the
+	 * wakeup handler expects the vCPU to be on the blocked_vcpu_list that
+	 * matches PI.NDST. Otherwise, a vcpu may not be able to be woken up
+	 * correctly.
+	 */
+	if (pi_desc->nv == POSTED_INTR_WAKEUP_VECTOR || vcpu->cpu == cpu) {
+		pi_clear_sn(pi_desc);
+		goto after_clear_sn;
+	}
+
+	/* The full case.  */
+	do {
+		old.control = new.control = pi_desc->control;
+
+		dest = cpu_physical_id(cpu);
+
+		if (x2apic_enabled())
+			new.ndst = dest;
+		else
+			new.ndst = (dest << 8) & 0xFF00;
+
+		new.sn = 0;
+	} while (cmpxchg64(&pi_desc->control, old.control,
+			   new.control) != old.control);
+
+after_clear_sn:
+
+	/*
+	 * Clear SN before reading the bitmap.  The VT-d firmware
+	 * writes the bitmap and reads SN atomically (5.2.3 in the
+	 * spec), so it doesn't really have a memory barrier that
+	 * pairs with this, but we cannot do that and we need one.
+	 */
+	smp_mb__after_atomic();
+
+	if (!pi_is_pir_empty(pi_desc))
+		pi_set_on(pi_desc);
+}
+
+void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu)
+{
+	struct vcpu_vmx *vmx = to_vmx(vcpu);
+	bool already_loaded = vmx->loaded_vmcs->cpu == cpu;
+
+	if (!already_loaded) {
+		loaded_vmcs_clear(vmx->loaded_vmcs);
+		local_irq_disable();
+		crash_disable_local_vmclear(cpu);
+
+		/*
+		 * Read loaded_vmcs->cpu should be before fetching
+		 * loaded_vmcs->loaded_vmcss_on_cpu_link.
+		 * See the comments in __loaded_vmcs_clear().
+		 */
+		smp_rmb();
+
+		list_add(&vmx->loaded_vmcs->loaded_vmcss_on_cpu_link,
+			 &per_cpu(loaded_vmcss_on_cpu, cpu));
+		crash_enable_local_vmclear(cpu);
+		local_irq_enable();
+	}
+
+	if (per_cpu(current_vmcs, cpu) != vmx->loaded_vmcs->vmcs) {
+		per_cpu(current_vmcs, cpu) = vmx->loaded_vmcs->vmcs;
+		vmcs_load(vmx->loaded_vmcs->vmcs);
+		indirect_branch_prediction_barrier();
+	}
+
+	if (!already_loaded) {
+		void *gdt = get_current_gdt_ro();
+		unsigned long sysenter_esp;
+
+		kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
+
+		/*
+		 * Linux uses per-cpu TSS and GDT, so set these when switching
+		 * processors.  See 22.2.4.
+		 */
+		vmcs_writel(HOST_TR_BASE,
+			    (unsigned long)&get_cpu_entry_area(cpu)->tss.x86_tss);
+		vmcs_writel(HOST_GDTR_BASE, (unsigned long)gdt);   /* 22.2.4 */
+
+		rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
+		vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
+
+		vmx->loaded_vmcs->cpu = cpu;
+	}
+
+	/* Setup TSC multiplier */
+	if (kvm_has_tsc_control &&
+	    vmx->current_tsc_ratio != vcpu->arch.tsc_scaling_ratio)
+		decache_tsc_multiplier(vmx);
+}
+
+/*
+ * Switches to specified vcpu, until a matching vcpu_put(), but assumes
+ * vcpu mutex is already taken.
+ */
+void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
+{
+	struct vcpu_vmx *vmx = to_vmx(vcpu);
+
+	vmx_vcpu_load_vmcs(vcpu, cpu);
+
+	vmx_vcpu_pi_load(vcpu, cpu);
+
+	vmx->host_pkru = read_pkru();
+	vmx->host_debugctlmsr = get_debugctlmsr();
+}
+
+static void vmx_vcpu_pi_put(struct kvm_vcpu *vcpu)
+{
+	struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
+
+	if (!kvm_arch_has_assigned_device(vcpu->kvm) ||
+		!irq_remapping_cap(IRQ_POSTING_CAP)  ||
+		!kvm_vcpu_apicv_active(vcpu))
+		return;
+
+	/* Set SN when the vCPU is preempted */
+	if (vcpu->preempted)
+		pi_set_sn(pi_desc);
+}
+
+static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
+{
+	vmx_vcpu_pi_put(vcpu);
+
+	vmx_prepare_switch_to_host(to_vmx(vcpu));
+}
+
+static bool emulation_required(struct kvm_vcpu *vcpu)
+{
+	return emulate_invalid_guest_state && !guest_state_valid(vcpu);
+}
+
+static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu);
+
+unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
+{
+	struct vcpu_vmx *vmx = to_vmx(vcpu);
+	unsigned long rflags, save_rflags;
+
+	if (!kvm_register_is_available(vcpu, VCPU_EXREG_RFLAGS)) {
+		kvm_register_mark_available(vcpu, VCPU_EXREG_RFLAGS);
+		rflags = vmcs_readl(GUEST_RFLAGS);
+		if (vmx->rmode.vm86_active) {
+			rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
+			save_rflags = vmx->rmode.save_rflags;
+			rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
+		}
+		vmx->rflags = rflags;
+	}
+	return vmx->rflags;
+}
+
+void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
+{
+	struct vcpu_vmx *vmx = to_vmx(vcpu);
+	unsigned long old_rflags;
+
+	if (enable_unrestricted_guest) {
+		kvm_register_mark_available(vcpu, VCPU_EXREG_RFLAGS);
+		vmx->rflags = rflags;
+		vmcs_writel(GUEST_RFLAG