[PATCH 4.9 00/88] 4.9.216-stable review

[PATCH 4.9 00/88] 4.9.216-stable review

[Greg Kroah-Hartman]

This is the start of the stable review cycle for the 4.9.216 release.
There are 88 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 Thu, 12 Mar 2020 12:34:10 +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-4.9.216-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-4.9.y
and the diffstat can be found below.

thanks,

greg k-h

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

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Linux 4.9.216-rc1

yangerkun <yangerkun@huawei.com>
    crypto: algif_skcipher - use ZERO_OR_NULL_PTR in skcipher_recvmsg_async

Mikulas Patocka <mpatocka@redhat.com>
    dm cache: fix a crash due to incorrect work item cancelling

Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>
    powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems

Dan Carpenter <dan.carpenter@oracle.com>
    dmaengine: coh901318: Fix a double lock bug in dma_tc_handle()

Dan Carpenter <dan.carpenter@oracle.com>
    hwmon: (adt7462) Fix an error return in ADT7462_REG_VOLT()

Ahmad Fatoum <a.fatoum@pengutronix.de>
    ARM: imx: build v7_cpu_resume() unconditionally

Jason Gunthorpe <jgg@mellanox.com>
    RMDA/cm: Fix missing ib_cm_destroy_id() in ib_cm_insert_listen()

Bernard Metzler <bmt@zurich.ibm.com>
    RDMA/iwcm: Fix iwcm work deallocation

Charles Keepax <ckeepax@opensource.cirrus.com>
    ASoC: dapm: Correct DAPM handling of active widgets during shutdown

Matthias Reichl <hias@horus.com>
    ASoC: pcm512x: Fix unbalanced regulator enable call in probe error path

Takashi Iwai <tiwai@suse.de>
    ASoC: pcm: Fix possible buffer overflow in dpcm state sysfs output

Vladimir Oltean <olteanv@gmail.com>
    ARM: dts: ls1021a: Restore MDIO compatible to gianfar

Dmitry Osipenko <digetx@gmail.com>
    dmaengine: tegra-apb: Prevent race conditions of tasklet vs free list

Dmitry Osipenko <digetx@gmail.com>
    dmaengine: tegra-apb: Fix use-after-free

Sean Christopherson <sean.j.christopherson@intel.com>
    x86/pkeys: Manually set X86_FEATURE_OSPKE to preserve existing changes

Jiri Slaby <jslaby@suse.cz>
    vt: selection, push sel_lock up

Jiri Slaby <jslaby@suse.cz>
    vt: selection, push console lock down

Jiri Slaby <jslaby@suse.cz>
    vt: selection, close sel_buffer race

tangbin <tangbin@cmss.chinamobile.com>
    tty:serial:mvebu-uart:fix a wrong return

OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
    fat: fix uninit-memory access for partial initialized inode

Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
    vgacon: Fix a UAF in vgacon_invert_region

Eugeniu Rosca <erosca@de.adit-jv.com>
    usb: core: port: do error out if usb_autopm_get_interface() fails

Eugeniu Rosca <erosca@de.adit-jv.com>
    usb: core: hub: do error out if usb_autopm_get_interface() fails

Dan Lazewatsky <dlaz@chromium.org>
    usb: quirks: add NO_LPM quirk for Logitech Screen Share

Jim Lin <jilin@nvidia.com>
    usb: storage: Add quirk for Samsung Fit flash

Ronnie Sahlberg <lsahlber@redhat.com>
    cifs: don't leak -EAGAIN for stat() during reconnect

H.J. Lu <hjl.tools@gmail.com>
    x86/boot/compressed: Don't declare __force_order in kaslr_64.c

Vasily Averin <vvs@virtuozzo.com>
    s390/cio: cio_ignore_proc_seq_next should increase position index

Marco Felsch <m.felsch@pengutronix.de>
    watchdog: da9062: do not ping the hw during stop()

Marek Vasut <marex@denx.de>
    net: ks8851-ml: Fix 16-bit IO operation

Marek Vasut <marex@denx.de>
    net: ks8851-ml: Fix 16-bit data access

Marek Vasut <marex@denx.de>
    net: ks8851-ml: Remove 8-bit bus accessors

Harigovindan P <harigovi@codeaurora.org>
    drm/msm/dsi: save pll state before dsi host is powered off

John Stultz <john.stultz@linaro.org>
    drm: msm: Fix return type of dsi_mgr_connector_mode_valid for kCFI

Sergey Organov <sorganov@gmail.com>
    usb: gadget: serial: fix Tx stall after buffer overflow

Lars-Peter Clausen <lars@metafoo.de>
    usb: gadget: ffs: ffs_aio_cancel(): Save/restore IRQ flags

Jack Pham <jackp@codeaurora.org>
    usb: gadget: composite: Support more than 500mA MaxPower

Daniel Golle <daniel@makrotopia.org>
    serial: ar933x_uart: set UART_CS_{RX,TX}_READY_ORIDE

Eugenio Pérez <eperezma@redhat.com>
    vhost: Check docket sk_family instead of call getname

Paul Moore <paul@paul-moore.com>
    audit: always check the netlink payload length in audit_receive_msg()

Wei Yang <richardw.yang@linux.intel.com>
    mm/huge_memory.c: use head to check huge zero page

Arnaldo Carvalho de Melo <acme@redhat.com>
    perf hists browser: Restore ESC as "Zoom out" of DSO/thread/etc

Christophe JAILLET <christophe.jaillet@wanadoo.fr>
    drivers: net: xgene: Fix the order of the arguments of 'alloc_etherdev_mqs()'

Jason Wang <jasowang@redhat.com>
    tuntap: correctly set SOCKWQ_ASYNC_NOSPACE

yangerkun <yangerkun@huawei.com>
    slip: stop double free sl->dev in slip_open

Sean Christopherson <sean.j.christopherson@intel.com>
    KVM: Check for a bad hva before dropping into the ghc slow path

Aleksa Sarai <cyphar@cyphar.com>
    namei: only return -ECHILD from follow_dotdot_rcu()

Arthur Kiyanovski <akiyano@amazon.com>
    net: ena: make ena rxfh support ETH_RSS_HASH_NO_CHANGE

Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
    net: netlink: cap max groups which will be considered in netlink_bind()

Chris Wilson <chris@chris-wilson.co.uk>
    include/linux/bitops.h: introduce BITS_PER_TYPE

Andy Shevchenko <andriy.shevchenko@linux.intel.com>
    serial: 8250: Check UPF_IRQ_SHARED in advance

Nathan Chancellor <natechancellor@gmail.com>
    ecryptfs: Fix up bad backport of fe2e082f5da5b4a0a92ae32978f81507ef37ec66

Wolfram Sang <wsa@the-dreams.de>
    i2c: jz4780: silence log flood on txabrt

Christophe JAILLET <christophe.jaillet@wanadoo.fr>
    MIPS: VPE: Fix a double free and a memory leak in 'release_vpe()'

dan.carpenter@oracle.com <dan.carpenter@oracle.com>
    HID: hiddev: Fix race in in hiddev_disconnect()

Johan Korsnes <jkorsnes@cisco.com>
    HID: core: increase HID report buffer size to 8KiB

Johan Korsnes <jkorsnes@cisco.com>
    HID: core: fix off-by-one memset in hid_report_raw_event()

Mika Westerberg <mika.westerberg@linux.intel.com>
    ACPI: watchdog: Fix gas->access_width usage

Mika Westerberg <mika.westerberg@linux.intel.com>
    ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro

Paul Moore <paul@paul-moore.com>
    audit: fix error handling in audit_data_to_entry()

Dan Carpenter <dan.carpenter@oracle.com>
    ext4: potential crash on allocation error in ext4_alloc_flex_bg_array()

Jason Baron <jbaron@akamai.com>
    net: sched: correct flower port blocking

Dmitry Osipenko <digetx@gmail.com>
    nfc: pn544: Fix occasional HW initialization failure

Xin Long <lucien.xin@gmail.com>
    sctp: move the format error check out of __sctp_sf_do_9_1_abort

Benjamin Poirier <bpoirier@cumulusnetworks.com>
    ipv6: Fix route replacement with dev-only route

Benjamin Poirier <bpoirier@cumulusnetworks.com>
    ipv6: Fix nlmsg_flags when splitting a multipath route

Arun Parameswaran <arun.parameswaran@broadcom.com>
    net: phy: restore mdio regs in the iproc mdio driver

Jethro Beekman <jethro@fortanix.com>
    net: fib_rules: Correctly set table field when table number exceeds 8 bits

Petr Mladek <pmladek@suse.com>
    sysrq: Remove duplicated sysrq message

Petr Mladek <pmladek@suse.com>
    sysrq: Restore original console_loglevel when sysrq disabled

Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
    cfg80211: add missing policy for NL80211_ATTR_STATUS_CODE

Frank Sorenson <sorenson@redhat.com>
    cifs: Fix mode output in debugging statements

Arthur Kiyanovski <akiyano@amazon.com>
    net: ena: ena-com.c: prevent NULL pointer dereference

Arthur Kiyanovski <akiyano@amazon.com>
    net: ena: fix incorrectly saving queue numbers when setting RSS indirection table

Arthur Kiyanovski <akiyano@amazon.com>
    net: ena: rss: store hash function as values and not bits

Sameeh Jubran <sameehj@amazon.com>
    net: ena: rss: fix failure to get indirection table

Arthur Kiyanovski <akiyano@amazon.com>
    net: ena: fix incorrect default RSS key

Arthur Kiyanovski <akiyano@amazon.com>
    net: ena: add missing ethtool TX timestamping indication

Arthur Kiyanovski <akiyano@amazon.com>
    net: ena: fix potential crash when rxfh key is NULL

Bjørn Mork <bjorn@mork.no>
    qmi_wwan: re-add DW5821e pre-production variant

Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
    cfg80211: check wiphy driver existence for drvinfo report

Johannes Berg <johannes.berg@intel.com>
    mac80211: consider more elements in parsing CRC

Sean Paul <seanpaul@chromium.org>
    drm/msm: Set dma maximum segment size for mdss

Corey Minyard <cminyard@mvista.com>
    ipmi:ssif: Handle a possible NULL pointer reference

Suraj Jitindar Singh <surajjs@amazon.com>
    ext4: fix potential race between s_group_info online resizing and access

Suraj Jitindar Singh <surajjs@amazon.com>
    ext4: fix potential race between s_flex_groups online resizing and access

Theodore Ts'o <tytso@mit.edu>
    ext4: fix potential race between online resizing and write operations

Johannes Berg <johannes.berg@intel.com>
    iwlwifi: pcie: fix rb_allocator workqueue allocation


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

Diffstat:

 Makefile                                         |   4 +-
 arch/arm/boot/dts/ls1021a.dtsi                   |   4 +-
 arch/arm/mach-imx/Makefile                       |   2 +
 arch/arm/mach-imx/common.h                       |   4 +-
 arch/arm/mach-imx/resume-imx6.S                  |  24 ++++++
 arch/arm/mach-imx/suspend-imx6.S                 |  14 ---
 arch/mips/kernel/vpe.c                           |   2 +-
 arch/powerpc/kernel/cputable.c                   |   4 +-
 arch/x86/boot/compressed/pagetable.c             |   3 -
 arch/x86/kernel/cpu/common.c                     |   2 +-
 crypto/algif_skcipher.c                          |   2 +-
 drivers/acpi/acpi_watchdog.c                     |   3 +-
 drivers/char/ipmi/ipmi_ssif.c                    |  10 ++-
 drivers/dma/coh901318.c                          |   4 -
 drivers/dma/tegra20-apb-dma.c                    |   6 +-
 drivers/gpu/drm/msm/dsi/dsi_manager.c            |   7 +-
 drivers/gpu/drm/msm/msm_drv.c                    |   8 ++
 drivers/hid/hid-core.c                           |   4 +-
 drivers/hid/usbhid/hiddev.c                      |   2 +-
 drivers/hwmon/adt7462.c                          |   2 +-
 drivers/i2c/busses/i2c-jz4780.c                  |  36 +-------
 drivers/infiniband/core/cm.c                     |   1 +
 drivers/infiniband/core/iwcm.c                   |   4 +-
 drivers/md/dm-cache-target.c                     |   4 +-
 drivers/net/ethernet/amazon/ena/ena_com.c        |  48 +++++++++--
 drivers/net/ethernet/amazon/ena/ena_com.h        |   9 ++
 drivers/net/ethernet/amazon/ena/ena_ethtool.c    |  42 ++++++++-
 drivers/net/ethernet/amazon/ena/ena_netdev.h     |   2 +
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c |   2 +-
 drivers/net/ethernet/micrel/ks8851_mll.c         |  53 ++----------
 drivers/net/phy/mdio-bcm-iproc.c                 |  20 +++++
 drivers/net/slip/slip.c                          |   1 -
 drivers/net/tun.c                                |  19 ++++-
 drivers/net/usb/qmi_wwan.c                       |   1 +
 drivers/net/wireless/intel/iwlwifi/pcie/rx.c     |   6 +-
 drivers/nfc/pn544/i2c.c                          |   1 +
 drivers/s390/cio/blacklist.c                     |   5 +-
 drivers/tty/serial/8250/8250_core.c              |   5 +-
 drivers/tty/serial/8250/8250_port.c              |   4 +
 drivers/tty/serial/ar933x_uart.c                 |   8 ++
 drivers/tty/serial/mvebu-uart.c                  |   2 +-
 drivers/tty/sysrq.c                              |   8 +-
 drivers/tty/vt/selection.c                       |  26 +++++-
 drivers/tty/vt/vt.c                              |   2 -
 drivers/usb/core/hub.c                           |   6 +-
 drivers/usb/core/port.c                          |  10 ++-
 drivers/usb/core/quirks.c                        |   3 +
 drivers/usb/gadget/composite.c                   |  24 ++++--
 drivers/usb/gadget/function/f_fs.c               |   5 +-
 drivers/usb/gadget/function/u_serial.c           |   4 +-
 drivers/usb/storage/unusual_devs.h               |   6 ++
 drivers/vhost/net.c                              |  13 +--
 drivers/video/console/vgacon.c                   |   3 +
 drivers/watchdog/da9062_wdt.c                    |   7 --
 drivers/watchdog/wdat_wdt.c                      |   2 +-
 fs/cifs/cifsacl.c                                |   4 +-
 fs/cifs/connect.c                                |   2 +-
 fs/cifs/inode.c                                  |   8 +-
 fs/ecryptfs/keystore.c                           |   4 +-
 fs/ext4/balloc.c                                 |  14 ++-
 fs/ext4/ext4.h                                   |  30 +++++--
 fs/ext4/ialloc.c                                 |  23 +++--
 fs/ext4/mballoc.c                                |  61 +++++++++-----
 fs/ext4/resize.c                                 |  62 +++++++++++---
 fs/ext4/super.c                                  | 103 ++++++++++++++++-------
 fs/fat/inode.c                                   |  19 ++---
 fs/namei.c                                       |   2 +-
 include/acpi/actypes.h                           |   2 +
 include/linux/bitops.h                           |   3 +-
 include/linux/hid.h                              |   2 +-
 include/net/flow_dissector.h                     |   9 ++
 kernel/audit.c                                   |  40 ++++-----
 kernel/auditfilter.c                             |  71 +++++++++-------
 mm/huge_memory.c                                 |   2 +-
 net/core/fib_rules.c                             |   2 +-
 net/ipv6/ip6_fib.c                               |   7 +-
 net/ipv6/route.c                                 |   1 +
 net/mac80211/util.c                              |  18 ++--
 net/netlink/af_netlink.c                         |   5 +-
 net/sched/cls_flower.c                           |   1 +
 net/sctp/sm_statefuns.c                          |  27 ++++--
 net/wireless/ethtool.c                           |   8 +-
 net/wireless/nl80211.c                           |   1 +
 sound/soc/codecs/pcm512x.c                       |   8 +-
 sound/soc/soc-dapm.c                             |   2 +-
 sound/soc/soc-pcm.c                              |  16 ++--
 tools/perf/ui/browsers/hists.c                   |   1 +
 virt/kvm/kvm_main.c                              |  12 +--
 88 files changed, 689 insertions(+), 384 deletions(-)

[PATCH 4.9 01/88] iwlwifi: pcie: fix rb_allocator workqueue allocation

[Greg Kroah-Hartman]

From: Johannes Berg <johannes.berg@intel.com>

commit 8188a18ee2e48c9a7461139838048363bfce3fef upstream

We don't handle failures in the rb_allocator workqueue allocation
correctly. To fix that, move the code earlier so the cleanup is
easier and we don't have to undo all the interrupt allocations in
this case.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
[Ajay: Rewrote this patch for v4.9.y, as 4.9.y codebase is different from mainline]
Signed-off-by: Ajay Kaher <akaher@vmware.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
index a2ebe46bcfc5b..395bbe2c0f983 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c
@@ -898,9 +898,13 @@ int iwl_pcie_rx_init(struct iwl_trans *trans)
 			return err;
 	}
 	def_rxq = trans_pcie->rxq;
-	if (!rba->alloc_wq)
+	if (!rba->alloc_wq) {
 		rba->alloc_wq = alloc_workqueue("rb_allocator",
 						WQ_HIGHPRI | WQ_UNBOUND, 1);
+		if (!rba->alloc_wq)
+			return -ENOMEM;
+	}
+
 	INIT_WORK(&rba->rx_alloc, iwl_pcie_rx_allocator_work);
 
 	cancel_work_sync(&rba->rx_alloc);
-- 
2.20.1

[PATCH 4.9 02/88] ext4: fix potential race between online resizing and write operations

[Greg Kroah-Hartman]

From: Theodore Ts'o <tytso@mit.edu>

commit 1d0c3924a92e69bfa91163bda83c12a994b4d106 upstream.

During an online resize an array of pointers to buffer heads gets
replaced so it can get enlarged.  If there is a racing block
allocation or deallocation which uses the old array, and the old array
has gotten reused this can lead to a GPF or some other random kernel
memory getting modified.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=206443
Link: https://lore.kernel.org/r/20200221053458.730016-2-tytso@mit.edu
Reported-by: Suraj Jitindar Singh <surajjs@amazon.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 4.4.x
Cc: stable@kernel.org # 4.9.x
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/balloc.c | 14 +++++++++---
 fs/ext4/ext4.h   | 20 +++++++++++++++++-
 fs/ext4/resize.c | 55 ++++++++++++++++++++++++++++++++++++++----------
 fs/ext4/super.c  | 31 +++++++++++++++++++--------
 4 files changed, 96 insertions(+), 24 deletions(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 2455fe1446d62..de601f3c023d8 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -279,6 +279,7 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
 	ext4_group_t ngroups = ext4_get_groups_count(sb);
 	struct ext4_group_desc *desc;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct buffer_head *bh_p;
 
 	if (block_group >= ngroups) {
 		ext4_error(sb, "block_group >= groups_count - block_group = %u,"
@@ -289,7 +290,14 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
 
 	group_desc = block_group >> EXT4_DESC_PER_BLOCK_BITS(sb);
 	offset = block_group & (EXT4_DESC_PER_BLOCK(sb) - 1);
-	if (!sbi->s_group_desc[group_desc]) {
+	bh_p = sbi_array_rcu_deref(sbi, s_group_desc, group_desc);
+	/*
+	 * sbi_array_rcu_deref returns with rcu unlocked, this is ok since
+	 * the pointer being dereferenced won't be dereferenced again. By
+	 * looking at the usage in add_new_gdb() the value isn't modified,
+	 * just the pointer, and so it remains valid.
+	 */
+	if (!bh_p) {
 		ext4_error(sb, "Group descriptor not loaded - "
 			   "block_group = %u, group_desc = %u, desc = %u",
 			   block_group, group_desc, offset);
@@ -297,10 +305,10 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
 	}
 
 	desc = (struct ext4_group_desc *)(
-		(__u8 *)sbi->s_group_desc[group_desc]->b_data +
+		(__u8 *)bh_p->b_data +
 		offset * EXT4_DESC_SIZE(sb));
 	if (bh)
-		*bh = sbi->s_group_desc[group_desc];
+		*bh = bh_p;
 	return desc;
 }
 
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9713d3d41412c..42c6c02382377 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1367,7 +1367,7 @@ struct ext4_sb_info {
 	loff_t s_bitmap_maxbytes;	/* max bytes for bitmap files */
 	struct buffer_head * s_sbh;	/* Buffer containing the super block */
 	struct ext4_super_block *s_es;	/* Pointer to the super block in the buffer */
-	struct buffer_head **s_group_desc;
+	struct buffer_head * __rcu *s_group_desc;
 	unsigned int s_mount_opt;
 	unsigned int s_mount_opt2;
 	unsigned int s_mount_flags;
@@ -1549,6 +1549,23 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
 		 ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
 }
 
+/*
+ * Returns: sbi->field[index]
+ * Used to access an array element from the following sbi fields which require
+ * rcu protection to avoid dereferencing an invalid pointer due to reassignment
+ * - s_group_desc
+ * - s_group_info
+ * - s_flex_group
+ */
+#define sbi_array_rcu_deref(sbi, field, index)				   \
+({									   \
+	typeof(*((sbi)->field)) _v;					   \
+	rcu_read_lock();						   \
+	_v = ((typeof(_v)*)rcu_dereference((sbi)->field))[index];	   \
+	rcu_read_unlock();						   \
+	_v;								   \
+})
+
 /*
  * Inode dynamic state flags
  */
@@ -2558,6 +2575,7 @@ extern int ext4_generic_delete_entry(handle_t *handle,
 extern bool ext4_empty_dir(struct inode *inode);
 
 /* resize.c */
+extern void ext4_kvfree_array_rcu(void *to_free);
 extern int ext4_group_add(struct super_block *sb,
 				struct ext4_new_group_data *input);
 extern int ext4_group_extend(struct super_block *sb,
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index aef2a24dc9f94..b788bbe74579b 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -16,6 +16,33 @@
 
 #include "ext4_jbd2.h"
 
+struct ext4_rcu_ptr {
+	struct rcu_head rcu;
+	void *ptr;
+};
+
+static void ext4_rcu_ptr_callback(struct rcu_head *head)
+{
+	struct ext4_rcu_ptr *ptr;
+
+	ptr = container_of(head, struct ext4_rcu_ptr, rcu);
+	kvfree(ptr->ptr);
+	kfree(ptr);
+}
+
+void ext4_kvfree_array_rcu(void *to_free)
+{
+	struct ext4_rcu_ptr *ptr = kzalloc(sizeof(*ptr), GFP_KERNEL);
+
+	if (ptr) {
+		ptr->ptr = to_free;
+		call_rcu(&ptr->rcu, ext4_rcu_ptr_callback);
+		return;
+	}
+	synchronize_rcu();
+	kvfree(to_free);
+}
+
 int ext4_resize_begin(struct super_block *sb)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -541,8 +568,8 @@ static int setup_new_flex_group_blocks(struct super_block *sb,
 				brelse(gdb);
 				goto out;
 			}
-			memcpy(gdb->b_data, sbi->s_group_desc[j]->b_data,
-			       gdb->b_size);
+			memcpy(gdb->b_data, sbi_array_rcu_deref(sbi,
+				s_group_desc, j)->b_data, gdb->b_size);
 			set_buffer_uptodate(gdb);
 
 			err = ext4_handle_dirty_metadata(handle, NULL, gdb);
@@ -849,13 +876,15 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
 	}
 	brelse(dind);
 
-	o_group_desc = EXT4_SB(sb)->s_group_desc;
+	rcu_read_lock();
+	o_group_desc = rcu_dereference(EXT4_SB(sb)->s_group_desc);
 	memcpy(n_group_desc, o_group_desc,
 	       EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
+	rcu_read_unlock();
 	n_group_desc[gdb_num] = gdb_bh;
-	EXT4_SB(sb)->s_group_desc = n_group_desc;
+	rcu_assign_pointer(EXT4_SB(sb)->s_group_desc, n_group_desc);
 	EXT4_SB(sb)->s_gdb_count++;
-	kvfree(o_group_desc);
+	ext4_kvfree_array_rcu(o_group_desc);
 
 	le16_add_cpu(&es->s_reserved_gdt_blocks, -1);
 	err = ext4_handle_dirty_super(handle, sb);
@@ -903,9 +932,11 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
 		return err;
 	}
 
-	o_group_desc = EXT4_SB(sb)->s_group_desc;
+	rcu_read_lock();
+	o_group_desc = rcu_dereference(EXT4_SB(sb)->s_group_desc);
 	memcpy(n_group_desc, o_group_desc,
 	       EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
+	rcu_read_unlock();
 	n_group_desc[gdb_num] = gdb_bh;
 
 	BUFFER_TRACE(gdb_bh, "get_write_access");
@@ -916,9 +947,9 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
 		return err;
 	}
 
-	EXT4_SB(sb)->s_group_desc = n_group_desc;
+	rcu_assign_pointer(EXT4_SB(sb)->s_group_desc, n_group_desc);
 	EXT4_SB(sb)->s_gdb_count++;
-	kvfree(o_group_desc);
+	ext4_kvfree_array_rcu(o_group_desc);
 	return err;
 }
 
@@ -1180,7 +1211,8 @@ static int ext4_add_new_descs(handle_t *handle, struct super_block *sb,
 		 * use non-sparse filesystems anymore.  This is already checked above.
 		 */
 		if (gdb_off) {
-			gdb_bh = sbi->s_group_desc[gdb_num];
+			gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc,
+						     gdb_num);
 			BUFFER_TRACE(gdb_bh, "get_write_access");
 			err = ext4_journal_get_write_access(handle, gdb_bh);
 
@@ -1262,7 +1294,7 @@ static int ext4_setup_new_descs(handle_t *handle, struct super_block *sb,
 		/*
 		 * get_write_access() has been called on gdb_bh by ext4_add_new_desc().
 		 */
-		gdb_bh = sbi->s_group_desc[gdb_num];
+		gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc, gdb_num);
 		/* Update group descriptor block for new group */
 		gdp = (struct ext4_group_desc *)(gdb_bh->b_data +
 						 gdb_off * EXT4_DESC_SIZE(sb));
@@ -1489,7 +1521,8 @@ exit_journal:
 		for (; gdb_num <= gdb_num_end; gdb_num++) {
 			struct buffer_head *gdb_bh;
 
-			gdb_bh = sbi->s_group_desc[gdb_num];
+			gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc,
+						     gdb_num);
 			if (old_gdb == gdb_bh->b_blocknr)
 				continue;
 			update_backups(sb, gdb_bh->b_blocknr, gdb_bh->b_data,
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index b69a78c061cbb..75840eef13417 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -826,6 +826,7 @@ static void ext4_put_super(struct super_block *sb)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct ext4_super_block *es = sbi->s_es;
+	struct buffer_head **group_desc;
 	int aborted = 0;
 	int i, err;
 
@@ -857,9 +858,12 @@ static void ext4_put_super(struct super_block *sb)
 	if (!(sb->s_flags & MS_RDONLY))
 		ext4_commit_super(sb, 1);
 
+	rcu_read_lock();
+	group_desc = rcu_dereference(sbi->s_group_desc);
 	for (i = 0; i < sbi->s_gdb_count; i++)
-		brelse(sbi->s_group_desc[i]);
-	kvfree(sbi->s_group_desc);
+		brelse(group_desc[i]);
+	kvfree(group_desc);
+	rcu_read_unlock();
 	kvfree(sbi->s_flex_groups);
 	percpu_counter_destroy(&sbi->s_freeclusters_counter);
 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
@@ -3403,7 +3407,7 @@ static void ext4_set_resv_clusters(struct super_block *sb)
 static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 {
 	char *orig_data = kstrdup(data, GFP_KERNEL);
-	struct buffer_head *bh;
+	struct buffer_head *bh, **group_desc;
 	struct ext4_super_block *es = NULL;
 	struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
 	ext4_fsblk_t block;
@@ -3955,9 +3959,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 			goto failed_mount;
 		}
 	}
-	sbi->s_group_desc = ext4_kvmalloc(db_count *
+	rcu_assign_pointer(sbi->s_group_desc,
+			   ext4_kvmalloc(db_count *
 					  sizeof(struct buffer_head *),
-					  GFP_KERNEL);
+					  GFP_KERNEL));
 	if (sbi->s_group_desc == NULL) {
 		ext4_msg(sb, KERN_ERR, "not enough memory");
 		ret = -ENOMEM;
@@ -3967,14 +3972,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	bgl_lock_init(sbi->s_blockgroup_lock);
 
 	for (i = 0; i < db_count; i++) {
+		struct buffer_head *bh;
+
 		block = descriptor_loc(sb, logical_sb_block, i);
-		sbi->s_group_desc[i] = sb_bread_unmovable(sb, block);
-		if (!sbi->s_group_desc[i]) {
+		bh = sb_bread_unmovable(sb, block);
+		if (!bh) {
 			ext4_msg(sb, KERN_ERR,
 			       "can't read group descriptor %d", i);
 			db_count = i;
 			goto failed_mount2;
 		}
+		rcu_read_lock();
+		rcu_dereference(sbi->s_group_desc)[i] = bh;
+		rcu_read_unlock();
 	}
 	sbi->s_gdb_count = db_count;
 	if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) {
@@ -4349,9 +4359,12 @@ failed_mount3:
 	if (sbi->s_mmp_tsk)
 		kthread_stop(sbi->s_mmp_tsk);
 failed_mount2:
+	rcu_read_lock();
+	group_desc = rcu_dereference(sbi->s_group_desc);
 	for (i = 0; i < db_count; i++)
-		brelse(sbi->s_group_desc[i]);
-	kvfree(sbi->s_group_desc);
+		brelse(group_desc[i]);
+	kvfree(group_desc);
+	rcu_read_unlock();
 failed_mount:
 	if (sbi->s_chksum_driver)
 		crypto_free_shash(sbi->s_chksum_driver);
-- 
2.20.1

[PATCH 4.9 03/88] ext4: fix potential race between s_flex_groups online resizing and access

[Greg Kroah-Hartman]

From: Suraj Jitindar Singh <surajjs@amazon.com>

commit 7c990728b99ed6fbe9c75fc202fce1172d9916da upstream.

During an online resize an array of s_flex_groups structures gets replaced
so it can get enlarged. If there is a concurrent access to the array and
this memory has been reused then this can lead to an invalid memory access.

The s_flex_group array has been converted into an array of pointers rather
than an array of structures. This is to ensure that the information
contained in the structures cannot get out of sync during a resize due to
an accessor updating the value in the old structure after it has been
copied but before the array pointer is updated. Since the structures them-
selves are no longer copied but only the pointers to them this case is
mitigated.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=206443
Link: https://lore.kernel.org/r/20200221053458.730016-4-tytso@mit.edu
Signed-off-by: Suraj Jitindar Singh <surajjs@amazon.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 4.4.x
Cc: stable@kernel.org # 4.9.x
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/ext4.h    |  2 +-
 fs/ext4/ialloc.c  | 23 +++++++++------
 fs/ext4/mballoc.c |  9 ++++--
 fs/ext4/resize.c  |  7 +++--
 fs/ext4/super.c   | 72 ++++++++++++++++++++++++++++++++---------------
 5 files changed, 76 insertions(+), 37 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 42c6c02382377..faa66b702059a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1475,7 +1475,7 @@ struct ext4_sb_info {
 	unsigned int s_extent_max_zeroout_kb;
 
 	unsigned int s_log_groups_per_flex;
-	struct flex_groups *s_flex_groups;
+	struct flex_groups * __rcu *s_flex_groups;
 	ext4_group_t s_flex_groups_allocated;
 
 	/* workqueue for reserved extent conversions (buffered io) */
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 4f78e099de1d9..c5af7bbf906fb 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -331,11 +331,13 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
 
 	percpu_counter_inc(&sbi->s_freeinodes_counter);
 	if (sbi->s_log_groups_per_flex) {
-		ext4_group_t f = ext4_flex_group(sbi, block_group);
+		struct flex_groups *fg;
 
-		atomic_inc(&sbi->s_flex_groups[f].free_inodes);
+		fg = sbi_array_rcu_deref(sbi, s_flex_groups,
+					 ext4_flex_group(sbi, block_group));
+		atomic_inc(&fg->free_inodes);
 		if (is_directory)
-			atomic_dec(&sbi->s_flex_groups[f].used_dirs);
+			atomic_dec(&fg->used_dirs);
 	}
 	BUFFER_TRACE(bh2, "call ext4_handle_dirty_metadata");
 	fatal = ext4_handle_dirty_metadata(handle, NULL, bh2);
@@ -376,12 +378,13 @@ static void get_orlov_stats(struct super_block *sb, ext4_group_t g,
 			    int flex_size, struct orlov_stats *stats)
 {
 	struct ext4_group_desc *desc;
-	struct flex_groups *flex_group = EXT4_SB(sb)->s_flex_groups;
 
 	if (flex_size > 1) {
-		stats->free_inodes = atomic_read(&flex_group[g].free_inodes);
-		stats->free_clusters = atomic64_read(&flex_group[g].free_clusters);
-		stats->used_dirs = atomic_read(&flex_group[g].used_dirs);
+		struct flex_groups *fg = sbi_array_rcu_deref(EXT4_SB(sb),
+							     s_flex_groups, g);
+		stats->free_inodes = atomic_read(&fg->free_inodes);
+		stats->free_clusters = atomic64_read(&fg->free_clusters);
+		stats->used_dirs = atomic_read(&fg->used_dirs);
 		return;
 	}
 
@@ -988,7 +991,8 @@ got:
 		if (sbi->s_log_groups_per_flex) {
 			ext4_group_t f = ext4_flex_group(sbi, group);
 
-			atomic_inc(&sbi->s_flex_groups[f].used_dirs);
+			atomic_inc(&sbi_array_rcu_deref(sbi, s_flex_groups,
+							f)->used_dirs);
 		}
 	}
 	if (ext4_has_group_desc_csum(sb)) {
@@ -1011,7 +1015,8 @@ got:
 
 	if (sbi->s_log_groups_per_flex) {
 		flex_group = ext4_flex_group(sbi, group);
-		atomic_dec(&sbi->s_flex_groups[flex_group].free_inodes);
+		atomic_dec(&sbi_array_rcu_deref(sbi, s_flex_groups,
+						flex_group)->free_inodes);
 	}
 
 	inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index a49d0e5d7baf8..c3619f3f40517 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2998,7 +2998,8 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
 		ext4_group_t flex_group = ext4_flex_group(sbi,
 							  ac->ac_b_ex.fe_group);
 		atomic64_sub(ac->ac_b_ex.fe_len,
-			     &sbi->s_flex_groups[flex_group].free_clusters);
+			     &sbi_array_rcu_deref(sbi, s_flex_groups,
+						  flex_group)->free_clusters);
 	}
 
 	err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
@@ -4888,7 +4889,8 @@ do_more:
 	if (sbi->s_log_groups_per_flex) {
 		ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
 		atomic64_add(count_clusters,
-			     &sbi->s_flex_groups[flex_group].free_clusters);
+			     &sbi_array_rcu_deref(sbi, s_flex_groups,
+						  flex_group)->free_clusters);
 	}
 
 	if (!(flags & EXT4_FREE_BLOCKS_NO_QUOT_UPDATE))
@@ -5033,7 +5035,8 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
 	if (sbi->s_log_groups_per_flex) {
 		ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
 		atomic64_add(EXT4_NUM_B2C(sbi, blocks_freed),
-			     &sbi->s_flex_groups[flex_group].free_clusters);
+			     &sbi_array_rcu_deref(sbi, s_flex_groups,
+						  flex_group)->free_clusters);
 	}
 
 	ext4_mb_unload_buddy(&e4b);
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index b788bbe74579b..845d9841c91c2 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1422,11 +1422,14 @@ static void ext4_update_super(struct super_block *sb,
 		   percpu_counter_read(&sbi->s_freeclusters_counter));
 	if (ext4_has_feature_flex_bg(sb) && sbi->s_log_groups_per_flex) {
 		ext4_group_t flex_group;
+		struct flex_groups *fg;
+
 		flex_group = ext4_flex_group(sbi, group_data[0].group);
+		fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group);
 		atomic64_add(EXT4_NUM_B2C(sbi, free_blocks),
-			     &sbi->s_flex_groups[flex_group].free_clusters);
+			     &fg->free_clusters);
 		atomic_add(EXT4_INODES_PER_GROUP(sb) * flex_gd->count,
-			   &sbi->s_flex_groups[flex_group].free_inodes);
+			   &fg->free_inodes);
 	}
 
 	/*
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 75840eef13417..d2f35321b3346 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -827,6 +827,7 @@ static void ext4_put_super(struct super_block *sb)
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct ext4_super_block *es = sbi->s_es;
 	struct buffer_head **group_desc;
+	struct flex_groups **flex_groups;
 	int aborted = 0;
 	int i, err;
 
@@ -863,8 +864,13 @@ static void ext4_put_super(struct super_block *sb)
 	for (i = 0; i < sbi->s_gdb_count; i++)
 		brelse(group_desc[i]);
 	kvfree(group_desc);
+	flex_groups = rcu_dereference(sbi->s_flex_groups);
+	if (flex_groups) {
+		for (i = 0; i < sbi->s_flex_groups_allocated; i++)
+			kvfree(flex_groups[i]);
+		kvfree(flex_groups);
+	}
 	rcu_read_unlock();
-	kvfree(sbi->s_flex_groups);
 	percpu_counter_destroy(&sbi->s_freeclusters_counter);
 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
 	percpu_counter_destroy(&sbi->s_dirs_counter);
@@ -2113,8 +2119,8 @@ done:
 int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
-	struct flex_groups *new_groups;
-	int size;
+	struct flex_groups **old_groups, **new_groups;
+	int size, i;
 
 	if (!sbi->s_log_groups_per_flex)
 		return 0;
@@ -2123,22 +2129,37 @@ int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup)
 	if (size <= sbi->s_flex_groups_allocated)
 		return 0;
 
-	size = roundup_pow_of_two(size * sizeof(struct flex_groups));
-	new_groups = ext4_kvzalloc(size, GFP_KERNEL);
+	new_groups = ext4_kvzalloc(roundup_pow_of_two(size *
+				   sizeof(*sbi->s_flex_groups)), GFP_KERNEL);
 	if (!new_groups) {
-		ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups",
-			 size / (int) sizeof(struct flex_groups));
+		ext4_msg(sb, KERN_ERR,
+			 "not enough memory for %d flex group pointers", size);
 		return -ENOMEM;
 	}
-
-	if (sbi->s_flex_groups) {
-		memcpy(new_groups, sbi->s_flex_groups,
-		       (sbi->s_flex_groups_allocated *
-			sizeof(struct flex_groups)));
-		kvfree(sbi->s_flex_groups);
+	for (i = sbi->s_flex_groups_allocated; i < size; i++) {
+		new_groups[i] = ext4_kvzalloc(roundup_pow_of_two(
+					      sizeof(struct flex_groups)),
+					      GFP_KERNEL);
+		if (!new_groups[i]) {
+			for (i--; i >= sbi->s_flex_groups_allocated; i--)
+				kvfree(new_groups[i]);
+			kvfree(new_groups);
+			ext4_msg(sb, KERN_ERR,
+				 "not enough memory for %d flex groups", size);
+			return -ENOMEM;
+		}
 	}
-	sbi->s_flex_groups = new_groups;
-	sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups);
+	rcu_read_lock();
+	old_groups = rcu_dereference(sbi->s_flex_groups);
+	if (old_groups)
+		memcpy(new_groups, old_groups,
+		       (sbi->s_flex_groups_allocated *
+			sizeof(struct flex_groups *)));
+	rcu_read_unlock();
+	rcu_assign_pointer(sbi->s_flex_groups, new_groups);
+	sbi->s_flex_groups_allocated = size;
+	if (old_groups)
+		ext4_kvfree_array_rcu(old_groups);
 	return 0;
 }
 
@@ -2146,6 +2167,7 @@ static int ext4_fill_flex_info(struct super_block *sb)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct ext4_group_desc *gdp = NULL;
+	struct flex_groups *fg;
 	ext4_group_t flex_group;
 	int i, err;
 
@@ -2163,12 +2185,11 @@ static int ext4_fill_flex_info(struct super_block *sb)
 		gdp = ext4_get_group_desc(sb, i, NULL);
 
 		flex_group = ext4_flex_group(sbi, i);
-		atomic_add(ext4_free_inodes_count(sb, gdp),
-			   &sbi->s_flex_groups[flex_group].free_inodes);
+		fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group);
+		atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes);
 		atomic64_add(ext4_free_group_clusters(sb, gdp),
-			     &sbi->s_flex_groups[flex_group].free_clusters);
-		atomic_add(ext4_used_dirs_count(sb, gdp),
-			   &sbi->s_flex_groups[flex_group].used_dirs);
+			     &fg->free_clusters);
+		atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs);
 	}
 
 	return 1;
@@ -3410,6 +3431,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	struct buffer_head *bh, **group_desc;
 	struct ext4_super_block *es = NULL;
 	struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
+	struct flex_groups **flex_groups;
 	ext4_fsblk_t block;
 	ext4_fsblk_t sb_block = get_sb_block(&data);
 	ext4_fsblk_t logical_sb_block;
@@ -4326,8 +4348,14 @@ failed_mount7:
 	ext4_unregister_li_request(sb);
 failed_mount6:
 	ext4_mb_release(sb);
-	if (sbi->s_flex_groups)
-		kvfree(sbi->s_flex_groups);
+	rcu_read_lock();
+	flex_groups = rcu_dereference(sbi->s_flex_groups);
+	if (flex_groups) {
+		for (i = 0; i < sbi->s_flex_groups_allocated; i++)
+			kvfree(flex_groups[i]);
+		kvfree(flex_groups);
+	}
+	rcu_read_unlock();
 	percpu_counter_destroy(&sbi->s_freeclusters_counter);
 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
 	percpu_counter_destroy(&sbi->s_dirs_counter);
-- 
2.20.1

[PATCH 4.9 04/88] ext4: fix potential race between s_group_info online resizing and access

[Greg Kroah-Hartman]

From: Suraj Jitindar Singh <surajjs@amazon.com>

[ Upstream commit df3da4ea5a0fc5d115c90d5aa6caa4dd433750a7 ]

During an online resize an array of pointers to s_group_info gets replaced
so it can get enlarged. If there is a concurrent access to the array in
ext4_get_group_info() and this memory has been reused then this can lead to
an invalid memory access.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=206443
Link: https://lore.kernel.org/r/20200221053458.730016-3-tytso@mit.edu
Signed-off-by: Suraj Jitindar Singh <surajjs@amazon.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Balbir Singh <sblbir@amazon.com>
Cc: stable@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/ext4.h    |  8 ++++----
 fs/ext4/mballoc.c | 52 +++++++++++++++++++++++++++++++----------------
 2 files changed, 39 insertions(+), 21 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index faa66b702059a..eb0ec50684233 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1427,7 +1427,7 @@ struct ext4_sb_info {
 #endif
 
 	/* for buddy allocator */
-	struct ext4_group_info ***s_group_info;
+	struct ext4_group_info ** __rcu *s_group_info;
 	struct inode *s_buddy_cache;
 	spinlock_t s_md_lock;
 	unsigned short *s_mb_offsets;
@@ -2816,13 +2816,13 @@ static inline
 struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
 					    ext4_group_t group)
 {
-	 struct ext4_group_info ***grp_info;
+	 struct ext4_group_info **grp_info;
 	 long indexv, indexh;
 	 BUG_ON(group >= EXT4_SB(sb)->s_groups_count);
-	 grp_info = EXT4_SB(sb)->s_group_info;
 	 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
 	 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
-	 return grp_info[indexv][indexh];
+	 grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv);
+	 return grp_info[indexh];
 }
 
 /*
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c3619f3f40517..c18668e3135e8 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2377,7 +2377,7 @@ int ext4_mb_alloc_groupinfo(struct super_block *sb, ext4_group_t ngroups)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	unsigned size;
-	struct ext4_group_info ***new_groupinfo;
+	struct ext4_group_info ***old_groupinfo, ***new_groupinfo;
 
 	size = (ngroups + EXT4_DESC_PER_BLOCK(sb) - 1) >>
 		EXT4_DESC_PER_BLOCK_BITS(sb);
@@ -2390,13 +2390,16 @@ int ext4_mb_alloc_groupinfo(struct super_block *sb, ext4_group_t ngroups)
 		ext4_msg(sb, KERN_ERR, "can't allocate buddy meta group");
 		return -ENOMEM;
 	}
-	if (sbi->s_group_info) {
-		memcpy(new_groupinfo, sbi->s_group_info,
+	rcu_read_lock();
+	old_groupinfo = rcu_dereference(sbi->s_group_info);
+	if (old_groupinfo)
+		memcpy(new_groupinfo, old_groupinfo,
 		       sbi->s_group_info_size * sizeof(*sbi->s_group_info));
-		kvfree(sbi->s_group_info);
-	}
-	sbi->s_group_info = new_groupinfo;
+	rcu_read_unlock();
+	rcu_assign_pointer(sbi->s_group_info, new_groupinfo);
 	sbi->s_group_info_size = size / sizeof(*sbi->s_group_info);
+	if (old_groupinfo)
+		ext4_kvfree_array_rcu(old_groupinfo);
 	ext4_debug("allocated s_groupinfo array for %d meta_bg's\n", 
 		   sbi->s_group_info_size);
 	return 0;
@@ -2408,6 +2411,7 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
 {
 	int i;
 	int metalen = 0;
+	int idx = group >> EXT4_DESC_PER_BLOCK_BITS(sb);
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct ext4_group_info **meta_group_info;
 	struct kmem_cache *cachep = get_groupinfo_cache(sb->s_blocksize_bits);
@@ -2426,12 +2430,12 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
 				 "for a buddy group");
 			goto exit_meta_group_info;
 		}
-		sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)] =
-			meta_group_info;
+		rcu_read_lock();
+		rcu_dereference(sbi->s_group_info)[idx] = meta_group_info;
+		rcu_read_unlock();
 	}
 
-	meta_group_info =
-		sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)];
+	meta_group_info = sbi_array_rcu_deref(sbi, s_group_info, idx);
 	i = group & (EXT4_DESC_PER_BLOCK(sb) - 1);
 
 	meta_group_info[i] = kmem_cache_zalloc(cachep, GFP_NOFS);
@@ -2479,8 +2483,13 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group,
 exit_group_info:
 	/* If a meta_group_info table has been allocated, release it now */
 	if (group % EXT4_DESC_PER_BLOCK(sb) == 0) {
-		kfree(sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)]);
-		sbi->s_group_info[group >> EXT4_DESC_PER_BLOCK_BITS(sb)] = NULL;
+		struct ext4_group_info ***group_info;
+
+		rcu_read_lock();
+		group_info = rcu_dereference(sbi->s_group_info);
+		kfree(group_info[idx]);
+		group_info[idx] = NULL;
+		rcu_read_unlock();
 	}
 exit_meta_group_info:
 	return -ENOMEM;
@@ -2493,6 +2502,7 @@ static int ext4_mb_init_backend(struct super_block *sb)
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	int err;
 	struct ext4_group_desc *desc;
+	struct ext4_group_info ***group_info;
 	struct kmem_cache *cachep;
 
 	err = ext4_mb_alloc_groupinfo(sb, ngroups);
@@ -2527,11 +2537,16 @@ err_freebuddy:
 	while (i-- > 0)
 		kmem_cache_free(cachep, ext4_get_group_info(sb, i));
 	i = sbi->s_group_info_size;
+	rcu_read_lock();
+	group_info = rcu_dereference(sbi->s_group_info);
 	while (i-- > 0)
-		kfree(sbi->s_group_info[i]);
+		kfree(group_info[i]);
+	rcu_read_unlock();
 	iput(sbi->s_buddy_cache);
 err_freesgi:
-	kvfree(sbi->s_group_info);
+	rcu_read_lock();
+	kvfree(rcu_dereference(sbi->s_group_info));
+	rcu_read_unlock();
 	return -ENOMEM;
 }
 
@@ -2720,7 +2735,7 @@ int ext4_mb_release(struct super_block *sb)
 	ext4_group_t ngroups = ext4_get_groups_count(sb);
 	ext4_group_t i;
 	int num_meta_group_infos;
-	struct ext4_group_info *grinfo;
+	struct ext4_group_info *grinfo, ***group_info;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct kmem_cache *cachep = get_groupinfo_cache(sb->s_blocksize_bits);
 
@@ -2738,9 +2753,12 @@ int ext4_mb_release(struct super_block *sb)
 		num_meta_group_infos = (ngroups +
 				EXT4_DESC_PER_BLOCK(sb) - 1) >>
 			EXT4_DESC_PER_BLOCK_BITS(sb);
+		rcu_read_lock();
+		group_info = rcu_dereference(sbi->s_group_info);
 		for (i = 0; i < num_meta_group_infos; i++)
-			kfree(sbi->s_group_info[i]);
-		kvfree(sbi->s_group_info);
+			kfree(group_info[i]);
+		kvfree(group_info);
+		rcu_read_unlock();
 	}
 	kfree(sbi->s_mb_offsets);
 	kfree(sbi->s_mb_maxs);
-- 
2.20.1

[PATCH 4.9 05/88] ipmi:ssif: Handle a possible NULL pointer reference

[Greg Kroah-Hartman]

From: Corey Minyard <cminyard@mvista.com>

[ Upstream commit 6b8526d3abc02c08a2f888e8c20b7ac9e5776dfe ]

In error cases a NULL can be passed to memcpy.  The length will always
be zero, so it doesn't really matter, but go ahead and check for NULL,
anyway, to be more precise and avoid static analysis errors.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/char/ipmi/ipmi_ssif.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
index 996b9ae154042..a4ef9a6bd3678 100644
--- a/drivers/char/ipmi/ipmi_ssif.c
+++ b/drivers/char/ipmi/ipmi_ssif.c
@@ -746,10 +746,14 @@ static void msg_done_handler(struct ssif_info *ssif_info, int result,
 	flags = ipmi_ssif_lock_cond(ssif_info, &oflags);
 	msg = ssif_info->curr_msg;
 	if (msg) {
+		if (data) {
+			if (len > IPMI_MAX_MSG_LENGTH)
+				len = IPMI_MAX_MSG_LENGTH;
+			memcpy(msg->rsp, data, len);
+		} else {
+			len = 0;
+		}
 		msg->rsp_size = len;
-		if (msg->rsp_size > IPMI_MAX_MSG_LENGTH)
-			msg->rsp_size = IPMI_MAX_MSG_LENGTH;
-		memcpy(msg->rsp, data, msg->rsp_size);
 		ssif_info->curr_msg = NULL;
 	}
 
-- 
2.20.1

[PATCH 4.9 06/88] drm/msm: Set dma maximum segment size for mdss

[Greg Kroah-Hartman]

From: Sean Paul <seanpaul@chromium.org>

[ Upstream commit db735fc4036bbe1fbe606819b5f0ff26cc76cdff ]

Turning on CONFIG_DMA_API_DEBUG_SG results in the following error:

[   12.078665] msm ae00000.mdss: DMA-API: mapping sg segment longer than device claims to support [len=3526656] [max=65536]
[   12.089870] WARNING: CPU: 6 PID: 334 at /mnt/host/source/src/third_party/kernel/v4.19/kernel/dma/debug.c:1301 debug_dma_map_sg+0x1dc/0x318
[   12.102655] Modules linked in: joydev
[   12.106442] CPU: 6 PID: 334 Comm: frecon Not tainted 4.19.0 #2
[   12.112450] Hardware name: Google Cheza (rev3+) (DT)
[   12.117566] pstate: 60400009 (nZCv daif +PAN -UAO)
[   12.122506] pc : debug_dma_map_sg+0x1dc/0x318
[   12.126995] lr : debug_dma_map_sg+0x1dc/0x318
[   12.131487] sp : ffffff800cc3ba80
[   12.134913] x29: ffffff800cc3ba80 x28: 0000000000000000
[   12.140395] x27: 0000000000000004 x26: 0000000000000004
[   12.145868] x25: ffffff8008e55b18 x24: 0000000000000000
[   12.151337] x23: 00000000ffffffff x22: ffffff800921c000
[   12.156809] x21: ffffffc0fa75b080 x20: ffffffc0f7195090
[   12.162280] x19: ffffffc0f1c53280 x18: 0000000000000000
[   12.167749] x17: 0000000000000000 x16: 0000000000000000
[   12.173218] x15: 0000000000000000 x14: 0720072007200720
[   12.178689] x13: 0720072007200720 x12: 0720072007200720
[   12.184161] x11: 0720072007200720 x10: 0720072007200720
[   12.189641] x9 : ffffffc0f1fc6b60 x8 : 0000000000000000
[   12.195110] x7 : ffffff8008132ce0 x6 : 0000000000000000
[   12.200585] x5 : 0000000000000000 x4 : ffffff8008134734
[   12.206058] x3 : ffffff800cc3b830 x2 : ffffffc0f1fc6240
[   12.211532] x1 : 25045a74f48a7400 x0 : 25045a74f48a7400
[   12.217006] Call trace:
[   12.219535]  debug_dma_map_sg+0x1dc/0x318
[   12.223671]  get_pages+0x19c/0x20c
[   12.227177]  msm_gem_fault+0x64/0xfc
[   12.230874]  __do_fault+0x3c/0x140
[   12.234383]  __handle_mm_fault+0x70c/0xdb8
[   12.238603]  handle_mm_fault+0xac/0xc4
[   12.242473]  do_page_fault+0x1bc/0x3d4
[   12.246342]  do_translation_fault+0x54/0x88
[   12.250652]  do_mem_abort+0x60/0xf0
[   12.254250]  el0_da+0x20/0x24
[   12.257317] irq event stamp: 67260
[   12.260828] hardirqs last  enabled at (67259): [<ffffff8008132d0c>] console_unlock+0x214/0x608
[   12.269693] hardirqs last disabled at (67260): [<ffffff8008080e0c>] do_debug_exception+0x5c/0x178
[   12.278820] softirqs last  enabled at (67256): [<ffffff8008081664>] __do_softirq+0x4d4/0x520
[   12.287510] softirqs last disabled at (67249): [<ffffff80080be574>] irq_exit+0xa8/0x100
[   12.295742] ---[ end trace e63cfc40c313ffab ]---

The root of the problem is that the default segment size for sgt is
(UINT_MAX & PAGE_MASK), and the default segment size for device dma is
64K. As such, if you compare the 2, you would deduce that the sg segment
will overflow the device's capacity. In reality, the hardware can
accommodate the larger sg segments, it's just not initializing its max
segment properly. This patch initializes the max segment size for the
mdss device, which gets rid of that pesky warning.

Reported-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200121111813.REPOST.1.I92c66a35fb13f368095b05287bdabdbe88ca6922@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 6abf315fd6da1..ce32f41fc28aa 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -396,6 +396,14 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 	if (ret)
 		goto fail;
 
+	if (!dev->dma_parms) {
+		dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
+					      GFP_KERNEL);
+		if (!dev->dma_parms)
+			return -ENOMEM;
+	}
+	dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
+
 	msm_gem_shrinker_init(ddev);
 
 	switch (get_mdp_ver(pdev)) {
-- 
2.20.1

[PATCH 4.9 07/88] mac80211: consider more elements in parsing CRC

[Greg Kroah-Hartman]

From: Johannes Berg <johannes.berg@intel.com>

[ Upstream commit a04564c99bb4a92f805a58e56b2d22cc4978f152 ]

We only use the parsing CRC for checking if a beacon changed,
and elements with an ID > 63 cannot be represented in the
filter. Thus, like we did before with WMM and Cisco vendor
elements, just statically add these forgotten items to the
CRC:
 - WLAN_EID_VHT_OPERATION
 - WLAN_EID_OPMODE_NOTIF

I guess that in most cases when VHT/HE operation change, the HT
operation also changed, and so the change was picked up, but we
did notice that pure operating mode notification changes were
ignored.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/20200131111300.891737-22-luca@coelho.fi
[restrict to VHT for the mac80211 branch]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/mac80211/util.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ca7de02e0a6e9..52f9742c438a4 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -943,16 +943,22 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 				elem_parse_failed = true;
 			break;
 		case WLAN_EID_VHT_OPERATION:
-			if (elen >= sizeof(struct ieee80211_vht_operation))
+			if (elen >= sizeof(struct ieee80211_vht_operation)) {
 				elems->vht_operation = (void *)pos;
-			else
-				elem_parse_failed = true;
+				if (calc_crc)
+					crc = crc32_be(crc, pos - 2, elen + 2);
+				break;
+			}
+			elem_parse_failed = true;
 			break;
 		case WLAN_EID_OPMODE_NOTIF:
-			if (elen > 0)
+			if (elen > 0) {
 				elems->opmode_notif = pos;
-			else
-				elem_parse_failed = true;
+				if (calc_crc)
+					crc = crc32_be(crc, pos - 2, elen + 2);
+				break;
+			}
+			elem_parse_failed = true;
 			break;
 		case WLAN_EID_MESH_ID:
 			elems->mesh_id = pos;
-- 
2.20.1

[PATCH 4.9 08/88] cfg80211: check wiphy driver existence for drvinfo report

[Greg Kroah-Hartman]

From: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>

[ Upstream commit bfb7bac3a8f47100ebe7961bd14e924c96e21ca7 ]

When preparing ethtool drvinfo, check if wiphy driver is defined
before dereferencing it. Driver may not exist, e.g. if wiphy is
attached to a virtual platform device.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Link: https://lore.kernel.org/r/20200203105644.28875-1-sergey.matyukevich.os@quantenna.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/wireless/ethtool.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/wireless/ethtool.c b/net/wireless/ethtool.c
index e9e91298c70de..3cedf2c2b60bd 100644
--- a/net/wireless/ethtool.c
+++ b/net/wireless/ethtool.c
@@ -6,9 +6,13 @@
 void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct device *pdev = wiphy_dev(wdev->wiphy);
 
-	strlcpy(info->driver, wiphy_dev(wdev->wiphy)->driver->name,
-		sizeof(info->driver));
+	if (pdev->driver)
+		strlcpy(info->driver, pdev->driver->name,
+			sizeof(info->driver));
+	else
+		strlcpy(info->driver, "N/A", sizeof(info->driver));
 
 	strlcpy(info->version, init_utsname()->release, sizeof(info->version));
 
-- 
2.20.1

[PATCH 4.9 09/88] qmi_wwan: re-add DW5821e pre-production variant

[Greg Kroah-Hartman]

From: Bjørn Mork <bjorn@mork.no>

[ Upstream commit 88bf54603f6f2c137dfee1abf6436ceac3528d2d ]

Commit f25e1392fdb5 removed the support for the pre-production variant
of the Dell DW5821e to avoid probing another USB interface unnecessarily.
However, the pre-production samples are found in the wild, and this lack
of support is causing problems for users of such samples.  It is therefore
necessary to support both variants.

Matching on both interfaces 0 and 1 is not expected to cause any problem
with either variant, as only the QMI function will be probed successfully
on either.  Interface 1 will be rejected based on the HID class for the
production variant:

T:  Bus=01 Lev=03 Prnt=04 Port=00 Cnt=01 Dev#= 16 Spd=480 MxCh= 0
D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  2
P:  Vendor=413c ProdID=81d7 Rev=03.18
S:  Manufacturer=DELL
S:  Product=DW5821e Snapdragon X20 LTE
S:  SerialNumber=0123456789ABCDEF
C:  #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
I:  If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I:  If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option

And interface 0 will be rejected based on too few endpoints for the
pre-production variant:

T: Bus=01 Lev=02 Prnt=02 Port=03 Cnt=03 Dev#= 7 Spd=480 MxCh= 0
D: Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 2
P: Vendor=413c ProdID=81d7 Rev= 3.18
S: Manufacturer=DELL
S: Product=DW5821e Snapdragon X20 LTE
S: SerialNumber=0123456789ABCDEF
C: #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=
I: If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
I: If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
I: If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option

Fixes: f25e1392fdb5 ("qmi_wwan: fix interface number for DW5821e production firmware")
Link: https://whrl.pl/Rf0vNk
Reported-by: Lars Melin <larsm17@gmail.com>
Cc: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/usb/qmi_wwan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index de7b431fdd6b5..97f6b8130db33 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -951,6 +951,7 @@ static const struct usb_device_id products[] = {
 	{QMI_FIXED_INTF(0x413c, 0x81b6, 8)},	/* Dell Wireless 5811e */
 	{QMI_FIXED_INTF(0x413c, 0x81b6, 10)},	/* Dell Wireless 5811e */
 	{QMI_FIXED_INTF(0x413c, 0x81d7, 0)},	/* Dell Wireless 5821e */
+	{QMI_FIXED_INTF(0x413c, 0x81d7, 1)},	/* Dell Wireless 5821e preproduction config */
 	{QMI_FIXED_INTF(0x413c, 0x81e0, 0)},	/* Dell Wireless 5821e with eSIM support*/
 	{QMI_FIXED_INTF(0x03f0, 0x4e1d, 8)},	/* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */
 	{QMI_FIXED_INTF(0x03f0, 0x9d1d, 1)},	/* HP lt4120 Snapdragon X5 LTE */
-- 
2.20.1

[PATCH 4.9 10/88] net: ena: fix potential crash when rxfh key is NULL

[Greg Kroah-Hartman]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit 91a65b7d3ed8450f31ab717a65dcb5f9ceb5ab02 ]

When ethtool -X is called without an hkey, ena_com_fill_hash_function()
is called with key=NULL, which is passed to memcpy causing a crash.

This commit fixes this issue by checking key is not NULL.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_com.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index 912dc09bc7a74..f09b7887039a2 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -2034,15 +2034,16 @@ int ena_com_fill_hash_function(struct ena_com_dev *ena_dev,
 
 	switch (func) {
 	case ENA_ADMIN_TOEPLITZ:
-		if (key_len > sizeof(hash_key->key)) {
-			pr_err("key len (%hu) is bigger than the max supported (%zu)\n",
-			       key_len, sizeof(hash_key->key));
-			return -EINVAL;
+		if (key) {
+			if (key_len != sizeof(hash_key->key)) {
+				pr_err("key len (%hu) doesn't equal the supported size (%zu)\n",
+				       key_len, sizeof(hash_key->key));
+				return -EINVAL;
+			}
+			memcpy(hash_key->key, key, key_len);
+			rss->hash_init_val = init_val;
+			hash_key->keys_num = key_len >> 2;
 		}
-
-		memcpy(hash_key->key, key, key_len);
-		rss->hash_init_val = init_val;
-		hash_key->keys_num = key_len >> 2;
 		break;
 	case ENA_ADMIN_CRC32:
 		rss->hash_init_val = init_val;
-- 
2.20.1

[PATCH 4.9 11/88] net: ena: add missing ethtool TX timestamping indication

[Greg Kroah-Hartman]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit cf6d17fde93bdda23c9b02dd5906a12bf8c55209 ]

Current implementation of the driver calls skb_tx_timestamp()to add a
software tx timestamp to the skb, however the software-transmit capability
is not reported in ethtool -T.

This commit updates the ethtool structure to report the software-transmit
capability in ethtool -T using the standard ethtool_op_get_ts_info().
This function reports all software timestamping capabilities (tx and rx),
as well as setting phc_index = -1. phc_index is the index of the PTP
hardware clock device that will be used for hardware timestamps. Since we
don't have such a device in ENA, using the default -1 value is the correct
setting.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Ezequiel Lara Gomez <ezegomez@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_ethtool.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
index 06fd061a20e9a..d85fe0de28dba 100644
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -819,6 +819,7 @@ static const struct ethtool_ops ena_ethtool_ops = {
 	.get_channels		= ena_get_channels,
 	.get_tunable		= ena_get_tunable,
 	.set_tunable		= ena_set_tunable,
+	.get_ts_info            = ethtool_op_get_ts_info,
 };
 
 void ena_set_ethtool_ops(struct net_device *netdev)
-- 
2.20.1

[PATCH 4.9 12/88] net: ena: fix incorrect default RSS key

[Greg Kroah-Hartman]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit 0d1c3de7b8c78a5e44b74b62ede4a63629f5d811 ]

Bug description:
When running "ethtool -x <if_name>" the key shows up as all zeros.

When we use "ethtool -X <if_name> hfunc toeplitz hkey <some:random:key>" to
set the key and then try to retrieve it using "ethtool -x <if_name>" then
we return the correct key because we return the one we saved.

Bug cause:
We don't fetch the key from the device but instead return the key
that we have saved internally which is by default set to zero upon
allocation.

Fix:
This commit fixes the issue by initializing the key to a random value
using netdev_rss_key_fill().

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_com.c | 15 +++++++++++++++
 drivers/net/ethernet/amazon/ena/ena_com.h |  1 +
 2 files changed, 16 insertions(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index f09b7887039a2..be8a2d48c98f2 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -839,6 +839,19 @@ static int ena_com_get_feature(struct ena_com_dev *ena_dev,
 				      0);
 }
 
+static void ena_com_hash_key_fill_default_key(struct ena_com_dev *ena_dev)
+{
+	struct ena_admin_feature_rss_flow_hash_control *hash_key =
+		(ena_dev->rss).hash_key;
+
+	netdev_rss_key_fill(&hash_key->key, sizeof(hash_key->key));
+	/* The key is stored in the device in u32 array
+	 * as well as the API requires the key to be passed in this
+	 * format. Thus the size of our array should be divided by 4
+	 */
+	hash_key->keys_num = sizeof(hash_key->key) / sizeof(u32);
+}
+
 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
 {
 	struct ena_rss *rss = &ena_dev->rss;
@@ -2367,6 +2380,8 @@ int ena_com_rss_init(struct ena_com_dev *ena_dev, u16 indr_tbl_log_size)
 	if (unlikely(rc))
 		goto err_hash_key;
 
+	ena_com_hash_key_fill_default_key(ena_dev);
+
 	rc = ena_com_hash_ctrl_init(ena_dev);
 	if (unlikely(rc))
 		goto err_hash_ctrl;
diff --git a/drivers/net/ethernet/amazon/ena/ena_com.h b/drivers/net/ethernet/amazon/ena/ena_com.h
index 509d7b8e15ab9..628bf7a8fc0cb 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -41,6 +41,7 @@
 #include <linux/spinlock.h>
 #include <linux/types.h>
 #include <linux/wait.h>
+#include <linux/netdevice.h>
 
 #include "ena_common_defs.h"
 #include "ena_admin_defs.h"
-- 
2.20.1

[PATCH 4.9 13/88] net: ena: rss: fix failure to get indirection table

[Greg Kroah-Hartman]

From: Sameeh Jubran <sameehj@amazon.com>

[ Upstream commit 0c8923c0a64fb5d14bebb9a9065d2dc25ac5e600 ]

On old hardware, getting / setting the hash function is not supported while
gettting / setting the indirection table is.

This commit enables us to still show the indirection table on older
hardwares by setting the hash function and key to NULL.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_ethtool.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
index d85fe0de28dba..8c44ac7232ba2 100644
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -663,7 +663,21 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
 	if (rc)
 		return rc;
 
+	/* We call this function in order to check if the device
+	 * supports getting/setting the hash function.
+	 */
 	rc = ena_com_get_hash_function(adapter->ena_dev, &ena_func, key);
+
+	if (rc) {
+		if (rc == -EOPNOTSUPP) {
+			key = NULL;
+			hfunc = NULL;
+			rc = 0;
+		}
+
+		return rc;
+	}
+
 	if (rc)
 		return rc;
 
-- 
2.20.1

[PATCH 4.9 14/88] net: ena: rss: store hash function as values and not bits

[Greg Kroah-Hartman]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit 4844470d472d660c26149ad764da2406adb13423 ]

The device receives, stores and retrieves the hash function value as bits
and not as their enum value.

The bug:
* In ena_com_set_hash_function() we set
  cmd.u.flow_hash_func.selected_func to the bit value of rss->hash_func.
 (1 << rss->hash_func)
* In ena_com_get_hash_function() we retrieve the hash function and store
  it's bit value in rss->hash_func. (Now the bit value of rss->hash_func
  is stored in rss->hash_func instead of it's enum value)

The fix:
This commit fixes the issue by converting the retrieved hash function
values from the device to the matching enum value of the set bit using
ffs(). ffs() finds the first set bit's index in a word. Since the function
returns 1 for the LSB's index, we need to subtract 1 from the returned
value (note that BIT(0) is 1).

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_com.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index be8a2d48c98f2..e1f694322e41a 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -2093,7 +2093,11 @@ int ena_com_get_hash_function(struct ena_com_dev *ena_dev,
 	if (unlikely(rc))
 		return rc;
 
-	rss->hash_func = get_resp.u.flow_hash_func.selected_func;
+	/* ffs() returns 1 in case the lsb is set */
+	rss->hash_func = ffs(get_resp.u.flow_hash_func.selected_func);
+	if (rss->hash_func)
+		rss->hash_func--;
+
 	if (func)
 		*func = rss->hash_func;
 
-- 
2.20.1

[PATCH 4.9 15/88] net: ena: fix incorrectly saving queue numbers when setting RSS indirection table

[Greg Kroah-Hartman]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit 92569fd27f5cb0ccbdf7c7d70044b690e89a0277 ]

The indirection table has the indices of the Rx queues. When we store it
during set indirection operation, we convert the indices to our internal
representation of the indices.

Our internal representation of the indices is: even indices for Tx and
uneven indices for Rx, where every Tx/Rx pair are in a consecutive order
starting from 0. For example if the driver has 3 queues (3 for Tx and 3
for Rx) then the indices are as follows:
0  1  2  3  4  5
Tx Rx Tx Rx Tx Rx

The BUG:
The issue is that when we satisfy a get request for the indirection
table, we don't convert the indices back to the original representation.

The FIX:
Simply apply the inverse function for the indices of the indirection
table after we set it.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_ethtool.c | 24 ++++++++++++++++++-
 drivers/net/ethernet/amazon/ena/ena_netdev.h  |  2 ++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
index 8c44ac7232ba2..191d369563595 100644
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -651,6 +651,28 @@ static u32 ena_get_rxfh_key_size(struct net_device *netdev)
 	return ENA_HASH_KEY_SIZE;
 }
 
+static int ena_indirection_table_get(struct ena_adapter *adapter, u32 *indir)
+{
+	struct ena_com_dev *ena_dev = adapter->ena_dev;
+	int i, rc;
+
+	if (!indir)
+		return 0;
+
+	rc = ena_com_indirect_table_get(ena_dev, indir);
+	if (rc)
+		return rc;
+
+	/* Our internal representation of the indices is: even indices
+	 * for Tx and uneven indices for Rx. We need to convert the Rx
+	 * indices to be consecutive
+	 */
+	for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++)
+		indir[i] = ENA_IO_RXQ_IDX_TO_COMBINED_IDX(indir[i]);
+
+	return rc;
+}
+
 static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
 			u8 *hfunc)
 {
@@ -659,7 +681,7 @@ static int ena_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key,
 	u8 func;
 	int rc;
 
-	rc = ena_com_indirect_table_get(adapter->ena_dev, indir);
+	rc = ena_indirection_table_get(adapter, indir);
 	if (rc)
 		return rc;
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index 008f2d594d402..326c2e1437b32 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -110,6 +110,8 @@
 
 #define ENA_IO_TXQ_IDX(q)	(2 * (q))
 #define ENA_IO_RXQ_IDX(q)	(2 * (q) + 1)
+#define ENA_IO_TXQ_IDX_TO_COMBINED_IDX(q)	((q) / 2)
+#define ENA_IO_RXQ_IDX_TO_COMBINED_IDX(q)	(((q) - 1) / 2)
 
 #define ENA_MGMNT_IRQ_IDX		0
 #define ENA_IO_IRQ_FIRST_IDX		1
-- 
2.20.1

[PATCH 4.9 16/88] net: ena: ena-com.c: prevent NULL pointer dereference

[Greg Kroah-Hartman]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit c207979f5ae10ed70aff1bb13f39f0736973de99 ]

comp_ctx can be NULL in a very rare case when an admin command is executed
during the execution of ena_remove().

The bug scenario is as follows:

* ena_destroy_device() sets the comp_ctx to be NULL
* An admin command is executed before executing unregister_netdev(),
  this can still happen because our device can still receive callbacks
  from the netdev infrastructure such as ethtool commands.
* When attempting to access the comp_ctx, the bug occurs since it's set
  to NULL

Fix:
Added a check that comp_ctx is not NULL

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_com.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
index e1f694322e41a..9bd2a7a5b5a78 100644
--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -199,6 +199,11 @@ static inline void comp_ctxt_release(struct ena_com_admin_queue *queue,
 static struct ena_comp_ctx *get_comp_ctxt(struct ena_com_admin_queue *queue,
 					  u16 command_id, bool capture)
 {
+	if (unlikely(!queue->comp_ctx)) {
+		pr_err("Completion context is NULL\n");
+		return NULL;
+	}
+
 	if (unlikely(command_id >= queue->q_depth)) {
 		pr_err("command id is larger than the queue size. cmd_id: %u queue size %d\n",
 		       command_id, queue->q_depth);
-- 
2.20.1

[PATCH 4.9 17/88] cifs: Fix mode output in debugging statements

[Greg Kroah-Hartman]

From: Frank Sorenson <sorenson@redhat.com>

[ Upstream commit f52aa79df43c4509146140de0241bc21a4a3b4c7 ]

A number of the debug statements output file or directory mode
in hex.  Change these to print using octal.

Signed-off-by: Frank Sorenson <sorenson@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/cifs/cifsacl.c | 4 ++--
 fs/cifs/connect.c | 2 +-
 fs/cifs/inode.c   | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 15bac390dff94..10aedc2a4c2dc 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -603,7 +603,7 @@ static void access_flags_to_mode(__le32 ace_flags, int type, umode_t *pmode,
 			((flags & FILE_EXEC_RIGHTS) == FILE_EXEC_RIGHTS))
 		*pmode |= (S_IXUGO & (*pbits_to_set));
 
-	cifs_dbg(NOISY, "access flags 0x%x mode now 0x%x\n", flags, *pmode);
+	cifs_dbg(NOISY, "access flags 0x%x mode now %04o\n", flags, *pmode);
 	return;
 }
 
@@ -632,7 +632,7 @@ static void mode_to_access_flags(umode_t mode, umode_t bits_to_use,
 	if (mode & S_IXUGO)
 		*pace_flags |= SET_FILE_EXEC_RIGHTS;
 
-	cifs_dbg(NOISY, "mode: 0x%x, access flags now 0x%x\n",
+	cifs_dbg(NOISY, "mode: %04o, access flags now 0x%x\n",
 		 mode, *pace_flags);
 	return;
 }
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 961fcb40183a4..f2707ff795d45 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3401,7 +3401,7 @@ int cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
 	cifs_sb->mnt_gid = pvolume_info->linux_gid;
 	cifs_sb->mnt_file_mode = pvolume_info->file_mode;
 	cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
-	cifs_dbg(FYI, "file mode: 0x%hx  dir mode: 0x%hx\n",
+	cifs_dbg(FYI, "file mode: %04ho  dir mode: %04ho\n",
 		 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
 
 	cifs_sb->actimeo = pvolume_info->actimeo;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index b1c0961e6b3f2..7dda3f137c7aa 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1573,7 +1573,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, umode_t mode)
 	struct TCP_Server_Info *server;
 	char *full_path;
 
-	cifs_dbg(FYI, "In cifs_mkdir, mode = 0x%hx inode = 0x%p\n",
+	cifs_dbg(FYI, "In cifs_mkdir, mode = %04ho inode = 0x%p\n",
 		 mode, inode);
 
 	cifs_sb = CIFS_SB(inode->i_sb);
-- 
2.20.1

[PATCH 4.9 18/88] cfg80211: add missing policy for NL80211_ATTR_STATUS_CODE

[Greg Kroah-Hartman]

From: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>

[ Upstream commit ea75080110a4c1fa011b0a73cb8f42227143ee3e ]

The nl80211_policy is missing for NL80211_ATTR_STATUS_CODE attribute.
As a result, for strictly validated commands, it's assumed to not be
supported.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Link: https://lore.kernel.org/r/20200213131608.10541-2-sergey.matyukevich.os@quantenna.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/wireless/nl80211.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index bb19be78aed70..9823bef65e5ec 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -333,6 +333,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 	[NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 	[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 	[NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
+	[NL80211_ATTR_STATUS_CODE] = { .type = NLA_U16 },
 	[NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 	[NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 	[NL80211_ATTR_PID] = { .type = NLA_U32 },
-- 
2.20.1

[PATCH 4.9 19/88] sysrq: Restore original console_loglevel when sysrq disabled

[Greg Kroah-Hartman]

From: Petr Mladek <pmladek@suse.com>

commit 075e1a0c50f59ea210561d0d0fedbd945615df78 upstream.

The sysrq header line is printed with an increased loglevel
to provide users some positive feedback.

The original loglevel is not restored when the sysrq operation
is disabled. This bug was introduced in 2.6.12 (pre-git-history)
by the commit ("Allow admin to enable only some of the Magic-Sysrq
functions").

Signed-off-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Tommi Rantala <tommi.t.rantala@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/sysrq.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -557,6 +557,7 @@ void __handle_sysrq(int key, bool check_
 			op_p->handler(key);
 		} else {
 			pr_cont("This sysrq operation is disabled.\n");
+			console_loglevel = orig_log_level;
 		}
 	} else {
 		pr_cont("HELP : ");

[PATCH 4.9 20/88] sysrq: Remove duplicated sysrq message

[Greg Kroah-Hartman]

From: Petr Mladek <pmladek@suse.com>

commit c3fee60908db4a8594f2e4a2131998384b8fa006 upstream.

The commit 97f5f0cd8cd0a0544 ("Input: implement SysRq as a separate input
handler") added pr_fmt() definition. It caused a duplicated message
prefix in the sysrq header messages, for example:

[  177.053931] sysrq: SysRq : Show backtrace of all active CPUs
[  742.864776] sysrq: SysRq : HELP : loglevel(0-9) reboot(b) crash(c)

Fixes: 97f5f0cd8cd0a05 ("Input: implement SysRq as a separate input handler")
Signed-off-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Tommi Rantala  <tommi.t.rantala@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/sysrq.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

--- a/drivers/tty/sysrq.c
+++ b/drivers/tty/sysrq.c
@@ -543,7 +543,6 @@ void __handle_sysrq(int key, bool check_
 	 */
 	orig_log_level = console_loglevel;
 	console_loglevel = CONSOLE_LOGLEVEL_DEFAULT;
-	pr_info("SysRq : ");
 
         op_p = __sysrq_get_key_op(key);
         if (op_p) {
@@ -552,15 +551,15 @@ void __handle_sysrq(int key, bool check_
 		 * should not) and is the invoked operation enabled?
 		 */
 		if (!check_mask || sysrq_on_mask(op_p->enable_mask)) {
-			pr_cont("%s\n", op_p->action_msg);
+			pr_info("%s\n", op_p->action_msg);
 			console_loglevel = orig_log_level;
 			op_p->handler(key);
 		} else {
-			pr_cont("This sysrq operation is disabled.\n");
+			pr_info("This sysrq operation is disabled.\n");
 			console_loglevel = orig_log_level;
 		}
 	} else {
-		pr_cont("HELP : ");
+		pr_info("HELP : ");
 		/* Only print the help msg once per handler */
 		for (i = 0; i < ARRAY_SIZE(sysrq_key_table); i++) {
 			if (sysrq_key_table[i]) {

[PATCH 4.9 21/88] net: fib_rules: Correctly set table field when table number exceeds 8 bits

[Greg Kroah-Hartman]

From: Jethro Beekman <jethro@fortanix.com>

[ Upstream commit 540e585a79e9d643ede077b73bcc7aa2d7b4d919 ]

In 709772e6e06564ed94ba740de70185ac3d792773, RT_TABLE_COMPAT was added to
allow legacy software to deal with routing table numbers >= 256, but the
same change to FIB rule queries was overlooked.

Signed-off-by: Jethro Beekman <jethro@fortanix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/core/fib_rules.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -640,7 +640,7 @@ static int fib_nl_fill_rule(struct sk_bu
 
 	frh = nlmsg_data(nlh);
 	frh->family = ops->family;
-	frh->table = rule->table;
+	frh->table = rule->table < 256 ? rule->table : RT_TABLE_COMPAT;
 	if (nla_put_u32(skb, FRA_TABLE, rule->table))
 		goto nla_put_failure;
 	if (nla_put_u32(skb, FRA_SUPPRESS_PREFIXLEN, rule->suppress_prefixlen))

[PATCH 4.9 22/88] net: phy: restore mdio regs in the iproc mdio driver

[Greg Kroah-Hartman]

From: Arun Parameswaran <arun.parameswaran@broadcom.com>

commit 6f08e98d62799e53c89dbf2c9a49d77e20ca648c upstream.

The mii management register in iproc mdio block
does not have a retention register so it is lost on suspend.
Save and restore value of register while resuming from suspend.

Fixes: bb1a619735b4 ("net: phy: Initialize mdio clock at probe function")
Signed-off-by: Arun Parameswaran <arun.parameswaran@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-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/phy/mdio-bcm-iproc.c |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

--- a/drivers/net/phy/mdio-bcm-iproc.c
+++ b/drivers/net/phy/mdio-bcm-iproc.c
@@ -188,6 +188,23 @@ static int iproc_mdio_remove(struct plat
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+int iproc_mdio_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct iproc_mdio_priv *priv = platform_get_drvdata(pdev);
+
+	/* restore the mii clock configuration */
+	iproc_mdio_config_clk(priv->base);
+
+	return 0;
+}
+
+static const struct dev_pm_ops iproc_mdio_pm_ops = {
+	.resume = iproc_mdio_resume
+};
+#endif /* CONFIG_PM_SLEEP */
+
 static const struct of_device_id iproc_mdio_of_match[] = {
 	{ .compatible = "brcm,iproc-mdio", },
 	{ /* sentinel */ },
@@ -198,6 +215,9 @@ static struct platform_driver iproc_mdio
 	.driver = {
 		.name = "iproc-mdio",
 		.of_match_table = iproc_mdio_of_match,
+#ifdef CONFIG_PM_SLEEP
+		.pm = &iproc_mdio_pm_ops,
+#endif
 	},
 	.probe = iproc_mdio_probe,
 	.remove = iproc_mdio_remove,

[PATCH 4.9 23/88] ipv6: Fix nlmsg_flags when splitting a multipath route

[Greg Kroah-Hartman]

From: Benjamin Poirier <bpoirier@cumulusnetworks.com>

[ Upstream commit afecdb376bd81d7e16578f0cfe82a1aec7ae18f3 ]

When splitting an RTA_MULTIPATH request into multiple routes and adding the
second and later components, we must not simply remove NLM_F_REPLACE but
instead replace it by NLM_F_CREATE. Otherwise, it may look like the netlink
message was malformed.

For example,
	ip route add 2001:db8::1/128 dev dummy0
	ip route change 2001:db8::1/128 nexthop via fe80::30:1 dev dummy0 \
		nexthop via fe80::30:2 dev dummy0
results in the following warnings:
[ 1035.057019] IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE
[ 1035.057517] IPv6: NLM_F_CREATE should be set when creating new route

This patch makes the nlmsg sequence look equivalent for __ip6_ins_rt() to
what it would get if the multipath route had been added in multiple netlink
operations:
	ip route add 2001:db8::1/128 dev dummy0
	ip route change 2001:db8::1/128 nexthop via fe80::30:1 dev dummy0
	ip route append 2001:db8::1/128 nexthop via fe80::30:2 dev dummy0

Fixes: 27596472473a ("ipv6: fix ECMP route replacement")
Signed-off-by: Benjamin Poirier <bpoirier@cumulusnetworks.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv6/route.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -3069,6 +3069,7 @@ static int ip6_route_multipath_add(struc
 		 */
 		cfg->fc_nlinfo.nlh->nlmsg_flags &= ~(NLM_F_EXCL |
 						     NLM_F_REPLACE);
+		cfg->fc_nlinfo.nlh->nlmsg_flags |= NLM_F_CREATE;
 		nhn++;
 	}
 

[PATCH 4.9 24/88] ipv6: Fix route replacement with dev-only route

[Greg Kroah-Hartman]

From: Benjamin Poirier <bpoirier@cumulusnetworks.com>

[ Upstream commit e404b8c7cfb31654c9024d497cec58a501501692 ]

After commit 27596472473a ("ipv6: fix ECMP route replacement") it is no
longer possible to replace an ECMP-able route by a non ECMP-able route.
For example,
	ip route add 2001:db8::1/128 via fe80::1 dev dummy0
	ip route replace 2001:db8::1/128 dev dummy0
does not work as expected.

Tweak the replacement logic so that point 3 in the log of the above commit
becomes:
3. If the new route is not ECMP-able, and no matching non-ECMP-able route
exists, replace matching ECMP-able route (if any) or add the new route.

We can now summarize the entire replace semantics to:
When doing a replace, prefer replacing a matching route of the same
"ECMP-able-ness" as the replace argument. If there is no such candidate,
fallback to the first route found.

Fixes: 27596472473a ("ipv6: fix ECMP route replacement")
Signed-off-by: Benjamin Poirier <bpoirier@cumulusnetworks.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv6/ip6_fib.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -784,8 +784,7 @@ static int fib6_add_rt2node(struct fib6_
 					found++;
 					break;
 				}
-				if (rt_can_ecmp)
-					fallback_ins = fallback_ins ?: ins;
+				fallback_ins = fallback_ins ?: ins;
 				goto next_iter;
 			}
 
@@ -825,7 +824,9 @@ next_iter:
 	}
 
 	if (fallback_ins && !found) {
-		/* No ECMP-able route found, replace first non-ECMP one */
+		/* No matching route with same ecmp-able-ness found, replace
+		 * first matching route
+		 */
 		ins = fallback_ins;
 		iter = *ins;
 		found++;

[PATCH 4.9 25/88] sctp: move the format error check out of __sctp_sf_do_9_1_abort

[Greg Kroah-Hartman]

From: Xin Long <lucien.xin@gmail.com>

[ Upstream commit 245709ec8be89af46ea7ef0444c9c80913999d99 ]

When T2 timer is to be stopped, the asoc should also be deleted,
otherwise, there will be no chance to call sctp_association_free
and the asoc could last in memory forever.

However, in sctp_sf_shutdown_sent_abort(), after adding the cmd
SCTP_CMD_TIMER_STOP for T2 timer, it may return error due to the
format error from __sctp_sf_do_9_1_abort() and miss adding
SCTP_CMD_ASSOC_FAILED where the asoc will be deleted.

This patch is to fix it by moving the format error check out of
__sctp_sf_do_9_1_abort(), and do it before adding the cmd
SCTP_CMD_TIMER_STOP for T2 timer.

Thanks Hangbin for reporting this issue by the fuzz testing.

v1->v2:
  - improve the comment in the code as Marcelo's suggestion.

Fixes: 96ca468b86b0 ("sctp: check invalid value of length parameter in error cause")
Reported-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sctp/sm_statefuns.c |   27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -177,6 +177,16 @@ sctp_chunk_length_valid(struct sctp_chun
 	return 1;
 }
 
+/* Check for format error in an ABORT chunk */
+static inline bool sctp_err_chunk_valid(struct sctp_chunk *chunk)
+{
+	struct sctp_errhdr *err;
+
+	sctp_walk_errors(err, chunk->chunk_hdr);
+
+	return (void *)err == (void *)chunk->chunk_end;
+}
+
 /**********************************************************
  * These are the state functions for handling chunk events.
  **********************************************************/
@@ -2159,6 +2169,9 @@ sctp_disposition_t sctp_sf_shutdown_pend
 		    sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest))
 		return sctp_sf_discard_chunk(net, ep, asoc, type, arg, commands);
 
+	if (!sctp_err_chunk_valid(chunk))
+		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
+
 	return __sctp_sf_do_9_1_abort(net, ep, asoc, type, arg, commands);
 }
 
@@ -2201,6 +2214,9 @@ sctp_disposition_t sctp_sf_shutdown_sent
 		    sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest))
 		return sctp_sf_discard_chunk(net, ep, asoc, type, arg, commands);
 
+	if (!sctp_err_chunk_valid(chunk))
+		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
+
 	/* Stop the T2-shutdown timer. */
 	sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP,
 			SCTP_TO(SCTP_EVENT_TIMEOUT_T2_SHUTDOWN));
@@ -2466,6 +2482,9 @@ sctp_disposition_t sctp_sf_do_9_1_abort(
 		    sctp_bind_addr_state(&asoc->base.bind_addr, &chunk->dest))
 		return sctp_sf_discard_chunk(net, ep, asoc, type, arg, commands);
 
+	if (!sctp_err_chunk_valid(chunk))
+		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
+
 	return __sctp_sf_do_9_1_abort(net, ep, asoc, type, arg, commands);
 }
 
@@ -2482,15 +2501,9 @@ static sctp_disposition_t __sctp_sf_do_9
 
 	/* See if we have an error cause code in the chunk.  */
 	len = ntohs(chunk->chunk_hdr->length);
-	if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr)) {
-
-		sctp_errhdr_t *err;
-		sctp_walk_errors(err, chunk->chunk_hdr);
-		if ((void *)err != (void *)chunk->chunk_end)
-			return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
 
+	if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr))
 		error = ((sctp_errhdr_t *)chunk->skb->data)->cause;
-	}
 
 	sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, SCTP_ERROR(ECONNRESET));
 	/* ASSOC_FAILED will DELETE_TCB. */

[PATCH 4.9 26/88] nfc: pn544: Fix occasional HW initialization failure

[Greg Kroah-Hartman]

From: Dmitry Osipenko <digetx@gmail.com>

[ Upstream commit c3331d2fe3fd4d5e321f2467d01f72de7edfb5d0 ]

The PN544 driver checks the "enable" polarity during of driver's probe and
it's doing that by turning ON and OFF NFC with different polarities until
enabling succeeds. It takes some time for the hardware to power-down, and
thus, to deassert the IRQ that is raised by turning ON the hardware.
Since the delay after last power-down of the polarity-checking process is
missed in the code, the interrupt may trigger immediately after installing
the IRQ handler (right after the checking is done), which results in IRQ
handler trying to touch the disabled HW and ends with marking NFC as
'DEAD' during of the driver's probe:

  pn544_hci_i2c 1-002a: NFC: nfc_en polarity : active high
  pn544_hci_i2c 1-002a: NFC: invalid len byte
  shdlc: llc_shdlc_recv_frame: NULL Frame -> link is dead

This patch fixes the occasional NFC initialization failure on Nexus 7
device.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/nfc/pn544/i2c.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/nfc/pn544/i2c.c
+++ b/drivers/nfc/pn544/i2c.c
@@ -240,6 +240,7 @@ static void pn544_hci_i2c_platform_init(
 
 out:
 	gpio_set_value_cansleep(phy->gpio_en, !phy->en_polarity);
+	usleep_range(10000, 15000);
 }
 
 static void pn544_hci_i2c_enable_mode(struct pn544_i2c_phy *phy, int run_mode)

[PATCH 4.9 27/88] net: sched: correct flower port blocking

[Greg Kroah-Hartman]

From: Jason Baron <jbaron@akamai.com>

[ Upstream commit 8a9093c79863b58cc2f9874d7ae788f0d622a596 ]

tc flower rules that are based on src or dst port blocking are sometimes
ineffective due to uninitialized stack data. __skb_flow_dissect() extracts
ports from the skb for tc flower to match against. However, the port
dissection is not done when when the FLOW_DIS_IS_FRAGMENT bit is set in
key_control->flags. All callers of __skb_flow_dissect(), zero-out the
key_control field except for fl_classify() as used by the flower
classifier. Thus, the FLOW_DIS_IS_FRAGMENT may be set on entry to
__skb_flow_dissect(), since key_control is allocated on the stack
and may not be initialized.

Since key_basic and key_control are present for all flow keys, let's
make sure they are initialized.

Fixes: 62230715fd24 ("flow_dissector: do not dissect l4 ports for fragments")
Co-developed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Jason Baron <jbaron@akamai.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/net/flow_dissector.h |    9 +++++++++
 net/sched/cls_flower.c       |    1 +
 2 files changed, 10 insertions(+)

--- a/include/net/flow_dissector.h
+++ b/include/net/flow_dissector.h
@@ -4,6 +4,7 @@
 #include <linux/types.h>
 #include <linux/in6.h>
 #include <linux/siphash.h>
+#include <linux/string.h>
 #include <uapi/linux/if_ether.h>
 
 /**
@@ -204,4 +205,12 @@ static inline void *skb_flow_dissector_t
 	return ((char *)target_container) + flow_dissector->offset[key_id];
 }
 
+static inline void
+flow_dissector_init_keys(struct flow_dissector_key_control *key_control,
+			 struct flow_dissector_key_basic *key_basic)
+{
+	memset(key_control, 0, sizeof(*key_control));
+	memset(key_basic, 0, sizeof(*key_basic));
+}
+
 #endif
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -141,6 +141,7 @@ static int fl_classify(struct sk_buff *s
 	if (!atomic_read(&head->ht.nelems))
 		return -1;
 
+	flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
 	fl_clear_masked_range(&skb_key, &head->mask);
 
 	info = skb_tunnel_info(skb);

[PATCH 4.9 28/88] ext4: potential crash on allocation error in ext4_alloc_flex_bg_array()

[Greg Kroah-Hartman]

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 37b0b6b8b99c0e1c1f11abbe7cf49b6d03795b3f upstream.

If sbi->s_flex_groups_allocated is zero and the first allocation fails
then this code will crash.  The problem is that "i--" will set "i" to
-1 but when we compare "i >= sbi->s_flex_groups_allocated" then the -1
is type promoted to unsigned and becomes UINT_MAX.  Since UINT_MAX
is more than zero, the condition is true so we call kvfree(new_groups[-1]).
The loop will carry on freeing invalid memory until it crashes.

Fixes: 7c990728b99e ("ext4: fix potential race between s_flex_groups online resizing and access")
Reviewed-by: Suraj Jitindar Singh <surajjs@amazon.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20200228092142.7irbc44yaz3by7nb@kili.mountain
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/ext4/super.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2120,7 +2120,7 @@ int ext4_alloc_flex_bg_array(struct supe
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct flex_groups **old_groups, **new_groups;
-	int size, i;
+	int size, i, j;
 
 	if (!sbi->s_log_groups_per_flex)
 		return 0;
@@ -2141,8 +2141,8 @@ int ext4_alloc_flex_bg_array(struct supe
 					      sizeof(struct flex_groups)),
 					      GFP_KERNEL);
 		if (!new_groups[i]) {
-			for (i--; i >= sbi->s_flex_groups_allocated; i--)
-				kvfree(new_groups[i]);
+			for (j = sbi->s_flex_groups_allocated; j < i; j++)
+				kvfree(new_groups[j]);
 			kvfree(new_groups);
 			ext4_msg(sb, KERN_ERR,
 				 "not enough memory for %d flex groups", size);

[PATCH 4.9 29/88] audit: fix error handling in audit_data_to_entry()

[Greg Kroah-Hartman]

From: Paul Moore <paul@paul-moore.com>

commit 2ad3e17ebf94b7b7f3f64c050ff168f9915345eb upstream.

Commit 219ca39427bf ("audit: use union for audit_field values since
they are mutually exclusive") combined a number of separate fields in
the audit_field struct into a single union.  Generally this worked
just fine because they are generally mutually exclusive.
Unfortunately in audit_data_to_entry() the overlap can be a problem
when a specific error case is triggered that causes the error path
code to attempt to cleanup an audit_field struct and the cleanup
involves attempting to free a stored LSM string (the lsm_str field).
Currently the code always has a non-NULL value in the
audit_field.lsm_str field as the top of the for-loop transfers a
value into audit_field.val (both .lsm_str and .val are part of the
same union); if audit_data_to_entry() fails and the audit_field
struct is specified to contain a LSM string, but the
audit_field.lsm_str has not yet been properly set, the error handling
code will attempt to free the bogus audit_field.lsm_str value that
was set with audit_field.val at the top of the for-loop.

This patch corrects this by ensuring that the audit_field.val is only
set when needed (it is cleared when the audit_field struct is
allocated with kcalloc()).  It also corrects a few other issues to
ensure that in case of error the proper error code is returned.

Cc: stable@vger.kernel.org
Fixes: 219ca39427bf ("audit: use union for audit_field values since they are mutually exclusive")
Reported-by: syzbot+1f4d90ead370d72e450b@syzkaller.appspotmail.com
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/auditfilter.c |   71 ++++++++++++++++++++++++++++-----------------------
 1 file changed, 39 insertions(+), 32 deletions(-)

--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -434,6 +434,7 @@ static struct audit_entry *audit_data_to
 	bufp = data->buf;
 	for (i = 0; i < data->field_count; i++) {
 		struct audit_field *f = &entry->rule.fields[i];
+		u32 f_val;
 
 		err = -EINVAL;
 
@@ -442,12 +443,12 @@ static struct audit_entry *audit_data_to
 			goto exit_free;
 
 		f->type = data->fields[i];
-		f->val = data->values[i];
+		f_val = data->values[i];
 
 		/* Support legacy tests for a valid loginuid */
-		if ((f->type == AUDIT_LOGINUID) && (f->val == AUDIT_UID_UNSET)) {
+		if ((f->type == AUDIT_LOGINUID) && (f_val == AUDIT_UID_UNSET)) {
 			f->type = AUDIT_LOGINUID_SET;
-			f->val = 0;
+			f_val = 0;
 			entry->rule.pflags |= AUDIT_LOGINUID_LEGACY;
 		}
 
@@ -463,7 +464,7 @@ static struct audit_entry *audit_data_to
 		case AUDIT_SUID:
 		case AUDIT_FSUID:
 		case AUDIT_OBJ_UID:
-			f->uid = make_kuid(current_user_ns(), f->val);
+			f->uid = make_kuid(current_user_ns(), f_val);
 			if (!uid_valid(f->uid))
 				goto exit_free;
 			break;
@@ -472,11 +473,12 @@ static struct audit_entry *audit_data_to
 		case AUDIT_SGID:
 		case AUDIT_FSGID:
 		case AUDIT_OBJ_GID:
-			f->gid = make_kgid(current_user_ns(), f->val);
+			f->gid = make_kgid(current_user_ns(), f_val);
 			if (!gid_valid(f->gid))
 				goto exit_free;
 			break;
 		case AUDIT_ARCH:
+			f->val = f_val;
 			entry->rule.arch_f = f;
 			break;
 		case AUDIT_SUBJ_USER:
@@ -489,11 +491,13 @@ static struct audit_entry *audit_data_to
 		case AUDIT_OBJ_TYPE:
 		case AUDIT_OBJ_LEV_LOW:
 		case AUDIT_OBJ_LEV_HIGH:
-			str = audit_unpack_string(&bufp, &remain, f->val);
-			if (IS_ERR(str))
+			str = audit_unpack_string(&bufp, &remain, f_val);
+			if (IS_ERR(str)) {
+				err = PTR_ERR(str);
 				goto exit_free;
-			entry->rule.buflen += f->val;
-
+			}
+			entry->rule.buflen += f_val;
+			f->lsm_str = str;
 			err = security_audit_rule_init(f->type, f->op, str,
 						       (void **)&f->lsm_rule);
 			/* Keep currently invalid fields around in case they
@@ -502,68 +506,71 @@ static struct audit_entry *audit_data_to
 				pr_warn("audit rule for LSM \'%s\' is invalid\n",
 					str);
 				err = 0;
-			}
-			if (err) {
-				kfree(str);
+			} else if (err)
 				goto exit_free;
-			} else
-				f->lsm_str = str;
 			break;
 		case AUDIT_WATCH:
-			str = audit_unpack_string(&bufp, &remain, f->val);
-			if (IS_ERR(str))
+			str = audit_unpack_string(&bufp, &remain, f_val);
+			if (IS_ERR(str)) {
+				err = PTR_ERR(str);
 				goto exit_free;
-			entry->rule.buflen += f->val;
-
-			err = audit_to_watch(&entry->rule, str, f->val, f->op);
+			}
+			err = audit_to_watch(&entry->rule, str, f_val, f->op);
 			if (err) {
 				kfree(str);
 				goto exit_free;
 			}
+			entry->rule.buflen += f_val;
 			break;
 		case AUDIT_DIR:
-			str = audit_unpack_string(&bufp, &remain, f->val);
-			if (IS_ERR(str))
+			str = audit_unpack_string(&bufp, &remain, f_val);
+			if (IS_ERR(str)) {
+				err = PTR_ERR(str);
 				goto exit_free;
-			entry->rule.buflen += f->val;
-
+			}
 			err = audit_make_tree(&entry->rule, str, f->op);
 			kfree(str);
 			if (err)
 				goto exit_free;
+			entry->rule.buflen += f_val;
 			break;
 		case AUDIT_INODE:
+			f->val = f_val;
 			err = audit_to_inode(&entry->rule, f);
 			if (err)
 				goto exit_free;
 			break;
 		case AUDIT_FILTERKEY:
-			if (entry->rule.filterkey || f->val > AUDIT_MAX_KEY_LEN)
+			if (entry->rule.filterkey || f_val > AUDIT_MAX_KEY_LEN)
 				goto exit_free;
-			str = audit_unpack_string(&bufp, &remain, f->val);
-			if (IS_ERR(str))
+			str = audit_unpack_string(&bufp, &remain, f_val);
+			if (IS_ERR(str)) {
+				err = PTR_ERR(str);
 				goto exit_free;
-			entry->rule.buflen += f->val;
+			}
+			entry->rule.buflen += f_val;
 			entry->rule.filterkey = str;
 			break;
 		case AUDIT_EXE:
-			if (entry->rule.exe || f->val > PATH_MAX)
+			if (entry->rule.exe || f_val > PATH_MAX)
 				goto exit_free;
-			str = audit_unpack_string(&bufp, &remain, f->val);
+			str = audit_unpack_string(&bufp, &remain, f_val);
 			if (IS_ERR(str)) {
 				err = PTR_ERR(str);
 				goto exit_free;
 			}
-			entry->rule.buflen += f->val;
-
-			audit_mark = audit_alloc_mark(&entry->rule, str, f->val);
+			audit_mark = audit_alloc_mark(&entry->rule, str, f_val);
 			if (IS_ERR(audit_mark)) {
 				kfree(str);
 				err = PTR_ERR(audit_mark);
 				goto exit_free;
 			}
+			entry->rule.buflen += f_val;
 			entry->rule.exe = audit_mark;
 			break;
+		default:
+			f->val = f_val;
+			break;
 		}
 	}
 

[PATCH 4.9 30/88] ACPICA: Introduce ACPI_ACCESS_BYTE_WIDTH() macro

[Greg Kroah-Hartman]

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

commit 1dade3a7048ccfc675650cd2cf13d578b095e5fb upstream.

Sometimes it is useful to find the access_width field value in bytes and
not in bits so add a helper that can be used for this purpose.

Suggested-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Cc: 4.16+ <stable@vger.kernel.org> # 4.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/acpi/actypes.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -551,6 +551,8 @@ typedef u64 acpi_integer;
 #define ACPI_VALIDATE_RSDP_SIG(a)       (!strncmp (ACPI_CAST_PTR (char, (a)), ACPI_SIG_RSDP, 8))
 #define ACPI_MAKE_RSDP_SIG(dest)        (memcpy (ACPI_CAST_PTR (char, (dest)), ACPI_SIG_RSDP, 8))
 
+#define ACPI_ACCESS_BYTE_WIDTH(size)    (1 << ((size) - 1))
+
 /*******************************************************************************
  *
  * Miscellaneous constants

[PATCH 4.9 31/88] ACPI: watchdog: Fix gas->access_width usage

[Greg Kroah-Hartman]

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

commit 2ba33a4e9e22ac4dda928d3e9b5978a3a2ded4e0 upstream.

ACPI Generic Address Structure (GAS) access_width field is not in bytes
as the driver seems to expect in few places so fix this by using the
newly introduced macro ACPI_ACCESS_BYTE_WIDTH().

Fixes: b1abf6fc4982 ("ACPI / watchdog: Fix off-by-one error at resource assignment")
Fixes: 058dfc767008 ("ACPI / watchdog: Add support for WDAT hardware watchdog")
Reported-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Cc: 4.16+ <stable@vger.kernel.org> # 4.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/acpi_watchdog.c |    3 +--
 drivers/watchdog/wdat_wdt.c  |    2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/acpi/acpi_watchdog.c
+++ b/drivers/acpi/acpi_watchdog.c
@@ -129,12 +129,11 @@ void __init acpi_watchdog_init(void)
 		gas = &entries[i].register_region;
 
 		res.start = gas->address;
+		res.end = res.start + ACPI_ACCESS_BYTE_WIDTH(gas->access_width) - 1;
 		if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
 			res.flags = IORESOURCE_MEM;
-			res.end = res.start + ALIGN(gas->access_width, 4) - 1;
 		} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
 			res.flags = IORESOURCE_IO;
-			res.end = res.start + gas->access_width - 1;
 		} else {
 			pr_warn("Unsupported address space: %u\n",
 				gas->space_id);
--- a/drivers/watchdog/wdat_wdt.c
+++ b/drivers/watchdog/wdat_wdt.c
@@ -392,7 +392,7 @@ static int wdat_wdt_probe(struct platfor
 
 		memset(&r, 0, sizeof(r));
 		r.start = gas->address;
-		r.end = r.start + gas->access_width - 1;
+		r.end = r.start + ACPI_ACCESS_BYTE_WIDTH(gas->access_width) - 1;
 		if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
 			r.flags = IORESOURCE_MEM;
 		} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {

[PATCH 4.9 32/88] HID: core: fix off-by-one memset in hid_report_raw_event()

[Greg Kroah-Hartman]

From: Johan Korsnes <jkorsnes@cisco.com>

commit 5ebdffd25098898aff1249ae2f7dbfddd76d8f8f upstream.

In case a report is greater than HID_MAX_BUFFER_SIZE, it is truncated,
but the report-number byte is not correctly handled. This results in a
off-by-one in the following memset, causing a kernel Oops and ensuing
system crash.

Note: With commit 8ec321e96e05 ("HID: Fix slab-out-of-bounds read in
hid_field_extract") I no longer hit the kernel Oops as we instead fail
"controlled" at probe if there is a report too long in the HID
report-descriptor. hid_report_raw_event() is an exported symbol, so
presumabely we cannot always rely on this being the case.

Fixes: 966922f26c7f ("HID: fix a crash in hid_report_raw_event()
                     function.")
Signed-off-by: Johan Korsnes <jkorsnes@cisco.com>
Cc: Armando Visconti <armando.visconti@st.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hid/hid-core.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1547,7 +1547,9 @@ int hid_report_raw_event(struct hid_devi
 
 	rsize = ((report->size - 1) >> 3) + 1;
 
-	if (rsize > HID_MAX_BUFFER_SIZE)
+	if (report_enum->numbered && rsize >= HID_MAX_BUFFER_SIZE)
+		rsize = HID_MAX_BUFFER_SIZE - 1;
+	else if (rsize > HID_MAX_BUFFER_SIZE)
 		rsize = HID_MAX_BUFFER_SIZE;
 
 	if (csize < rsize) {

[PATCH 4.9 33/88] HID: core: increase HID report buffer size to 8KiB

[Greg Kroah-Hartman]

From: Johan Korsnes <jkorsnes@cisco.com>

commit 84a4062632462c4320704fcdf8e99e89e94c0aba upstream.

We have a HID touch device that reports its opens and shorts test
results in HID buffers of size 8184 bytes. The maximum size of the HID
buffer is currently set to 4096 bytes, causing probe of this device to
fail. With this patch we increase the maximum size of the HID buffer to
8192 bytes, making device probe and acquisition of said buffers succeed.

Signed-off-by: Johan Korsnes <jkorsnes@cisco.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Armando Visconti <armando.visconti@st.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/linux/hid.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -453,7 +453,7 @@ struct hid_report_enum {
 };
 
 #define HID_MIN_BUFFER_SIZE	64		/* make sure there is at least a packet size of space */
-#define HID_MAX_BUFFER_SIZE	4096		/* 4kb */
+#define HID_MAX_BUFFER_SIZE	8192		/* 8kb */
 #define HID_CONTROL_FIFO_SIZE	256		/* to init devices with >100 reports */
 #define HID_OUTPUT_FIFO_SIZE	64
 

[PATCH 4.9 34/88] HID: hiddev: Fix race in in hiddev_disconnect()

[Greg Kroah-Hartman]

From: dan.carpenter@oracle.com <dan.carpenter@oracle.com>

commit 5c02c447eaeda29d3da121a2e17b97ccaf579b51 upstream.

Syzbot reports that "hiddev" is used after it's free in hiddev_disconnect().
The hiddev_disconnect() function sets "hiddev->exist = 0;" so
hiddev_release() can free it as soon as we drop the "existancelock"
lock.  This patch moves the mutex_unlock(&hiddev->existancelock) until
after we have finished using it.

Reported-by: syzbot+784ccb935f9900cc7c9e@syzkaller.appspotmail.com
Fixes: 7f77897ef2b6 ("HID: hiddev: fix potential use-after-free")
Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hid/usbhid/hiddev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -962,9 +962,9 @@ void hiddev_disconnect(struct hid_device
 	hiddev->exist = 0;
 
 	if (hiddev->open) {
-		mutex_unlock(&hiddev->existancelock);
 		usbhid_close(hiddev->hid);
 		wake_up_interruptible(&hiddev->wait);
+		mutex_unlock(&hiddev->existancelock);
 	} else {
 		mutex_unlock(&hiddev->existancelock);
 		kfree(hiddev);

[PATCH 4.9 35/88] MIPS: VPE: Fix a double free and a memory leak in release_vpe()

[Greg Kroah-Hartman]

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

commit bef8e2dfceed6daeb6ca3e8d33f9c9d43b926580 upstream.

Pointer on the memory allocated by 'alloc_progmem()' is stored in
'v->load_addr'. So this is this memory that should be freed by
'release_progmem()'.

'release_progmem()' is only a call to 'kfree()'.

With the current code, there is both a double free and a memory leak.
Fix it by passing the correct pointer to 'release_progmem()'.

Fixes: e01402b115ccc ("More AP / SP bits for the 34K, the Malta bits and things. Still wants")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: ralf@linux-mips.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/mips/kernel/vpe.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -134,7 +134,7 @@ void release_vpe(struct vpe *v)
 {
 	list_del(&v->list);
 	if (v->load_addr)
-		release_progmem(v);
+		release_progmem(v->load_addr);
 	kfree(v);
 }
 

[PATCH 4.9 35/88] MIPS: VPE: Fix a double free and a memory leak in release_vpe()

[Greg Kroah-Hartman]

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

commit bef8e2dfceed6daeb6ca3e8d33f9c9d43b926580 upstream.

Pointer on the memory allocated by 'alloc_progmem()' is stored in
'v->load_addr'. So this is this memory that should be freed by
'release_progmem()'.

'release_progmem()' is only a call to 'kfree()'.

With the current code, there is both a double free and a memory leak.
Fix it by passing the correct pointer to 'release_progmem()'.

Fixes: e01402b115ccc ("More AP / SP bits for the 34K, the Malta bits and things. Still wants")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: ralf@linux-mips.org
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/mips/kernel/vpe.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -134,7 +134,7 @@ void release_vpe(struct vpe *v)
 {
 	list_del(&v->list);
 	if (v->load_addr)
-		release_progmem(v);
+		release_progmem(v->load_addr);
 	kfree(v);
 }
 

[PATCH 4.9 36/88] i2c: jz4780: silence log flood on txabrt

[Greg Kroah-Hartman]

From: Wolfram Sang <wsa@the-dreams.de>

commit 9e661cedcc0a072d91a32cb88e0515ea26e35711 upstream.

The printout for txabrt is way too talkative and is highly annoying with
scanning programs like 'i2cdetect'. Reduce it to the minimum, the rest
can be gained by I2C core debugging and datasheet information. Also,
make it a debug printout, it won't help the regular user.

Fixes: ba92222ed63a ("i2c: jz4780: Add i2c bus controller driver for Ingenic JZ4780")
Reported-by: H. Nikolaus Schaller <hns@goldelico.com>
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/i2c/busses/i2c-jz4780.c |   36 ++----------------------------------
 1 file changed, 2 insertions(+), 34 deletions(-)

--- a/drivers/i2c/busses/i2c-jz4780.c
+++ b/drivers/i2c/busses/i2c-jz4780.c
@@ -82,25 +82,6 @@
 #define JZ4780_I2C_STA_TFNF		BIT(1)
 #define JZ4780_I2C_STA_ACT		BIT(0)
 
-static const char * const jz4780_i2c_abrt_src[] = {
-	"ABRT_7B_ADDR_NOACK",
-	"ABRT_10ADDR1_NOACK",
-	"ABRT_10ADDR2_NOACK",
-	"ABRT_XDATA_NOACK",
-	"ABRT_GCALL_NOACK",
-	"ABRT_GCALL_READ",
-	"ABRT_HS_ACKD",
-	"SBYTE_ACKDET",
-	"ABRT_HS_NORSTRT",
-	"SBYTE_NORSTRT",
-	"ABRT_10B_RD_NORSTRT",
-	"ABRT_MASTER_DIS",
-	"ARB_LOST",
-	"SLVFLUSH_TXFIFO",
-	"SLV_ARBLOST",
-	"SLVRD_INTX",
-};
-
 #define JZ4780_I2C_INTST_IGC		BIT(11)
 #define JZ4780_I2C_INTST_ISTT		BIT(10)
 #define JZ4780_I2C_INTST_ISTP		BIT(9)
@@ -538,21 +519,8 @@ done:
 
 static void jz4780_i2c_txabrt(struct jz4780_i2c *i2c, int src)
 {
-	int i;
-
-	dev_err(&i2c->adap.dev, "txabrt: 0x%08x\n", src);
-	dev_err(&i2c->adap.dev, "device addr=%x\n",
-		jz4780_i2c_readw(i2c, JZ4780_I2C_TAR));
-	dev_err(&i2c->adap.dev, "send cmd count:%d  %d\n",
-		i2c->cmd, i2c->cmd_buf[i2c->cmd]);
-	dev_err(&i2c->adap.dev, "receive data count:%d  %d\n",
-		i2c->cmd, i2c->data_buf[i2c->cmd]);
-
-	for (i = 0; i < 16; i++) {
-		if (src & BIT(i))
-			dev_dbg(&i2c->adap.dev, "I2C TXABRT[%d]=%s\n",
-				i, jz4780_i2c_abrt_src[i]);
-	}
+	dev_dbg(&i2c->adap.dev, "txabrt: 0x%08x, cmd: %d, send: %d, recv: %d\n",
+		src, i2c->cmd, i2c->cmd_buf[i2c->cmd], i2c->data_buf[i2c->cmd]);
 }
 
 static inline int jz4780_i2c_xfer_read(struct jz4780_i2c *i2c,

[PATCH 4.9 37/88] ecryptfs: Fix up bad backport of fe2e082f5da5b4a0a92ae32978f81507ef37ec66

[Greg Kroah-Hartman]

From: Nathan Chancellor <natechancellor@gmail.com>

When doing the 4.9 merge into certain Android trees, I noticed a warning
from Android's deprecated GCC 4.9.4, which causes a build failure in
those trees due to basically -Werror:

fs/ecryptfs/keystore.c: In function 'ecryptfs_parse_packet_set':
fs/ecryptfs/keystore.c:1357:2: warning: 'auth_tok_list_item' may be used
uninitialized in this function [-Wmaybe-uninitialized]
  memset(auth_tok_list_item, 0,
  ^
fs/ecryptfs/keystore.c:1260:38: note: 'auth_tok_list_item' was declared
here
  struct ecryptfs_auth_tok_list_item *auth_tok_list_item;
                                      ^

GCC 9.2.0 was not able to pick up this warning when I tested it.

Turns out that Clang warns as well when -Wuninitialized is used, which
is not the case in older stable trees at the moment (but shows value in
potentially backporting the various warning fixes currently in upstream
to get more coverage).

fs/ecryptfs/keystore.c:1284:6: warning: variable 'auth_tok_list_item' is
used uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
        if (data[(*packet_size)++] != ECRYPTFS_TAG_1_PACKET_TYPE) {
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/ecryptfs/keystore.c:1360:4: note: uninitialized use occurs here
                        auth_tok_list_item);
                        ^~~~~~~~~~~~~~~~~~
fs/ecryptfs/keystore.c:1284:2: note: remove the 'if' if its condition is
always false
        if (data[(*packet_size)++] != ECRYPTFS_TAG_1_PACKET_TYPE) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/ecryptfs/keystore.c:1260:56: note: initialize the variable
'auth_tok_list_item' to silence this warning
        struct ecryptfs_auth_tok_list_item *auth_tok_list_item;
                                                              ^
                                                               = NULL
1 warning generated.

Somehow, commit fe2e082f5da5 ("ecryptfs: fix a memory leak bug in
parse_tag_1_packet()") upstream was not applied in the correct if block
in 4.4.215, 4.9.215, and 4.14.172, which will indeed lead to use of
uninitialized memory. Fix it up by undoing the bad backport in those
trees then reapplying the patch in the proper location.

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/ecryptfs/keystore.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1285,7 +1285,7 @@ parse_tag_1_packet(struct ecryptfs_crypt
 		printk(KERN_ERR "Enter w/ first byte != 0x%.2x\n",
 		       ECRYPTFS_TAG_1_PACKET_TYPE);
 		rc = -EINVAL;
-		goto out_free;
+		goto out;
 	}
 	/* Released: wipe_auth_tok_list called in ecryptfs_parse_packet_set or
 	 * at end of function upon failure */
@@ -1335,7 +1335,7 @@ parse_tag_1_packet(struct ecryptfs_crypt
 		printk(KERN_WARNING "Tag 1 packet contains key larger "
 		       "than ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES");
 		rc = -EINVAL;
-		goto out;
+		goto out_free;
 	}
 	memcpy((*new_auth_tok)->session_key.encrypted_key,
 	       &data[(*packet_size)], (body_size - (ECRYPTFS_SIG_SIZE + 2)));

[PATCH 4.9 38/88] serial: 8250: Check UPF_IRQ_SHARED in advance

[Greg Kroah-Hartman]

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

commit 7febbcbc48fc92e3f33863b32ed715ba4aff18c4 upstream.

The commit 54e53b2e8081
  ("tty: serial: 8250: pass IRQ shared flag to UART ports")
nicely explained the problem:

---8<---8<---

On some systems IRQ lines between multiple UARTs might be shared. If so, the
irqflags have to be configured accordingly. The reason is: The 8250 port startup
code performs IRQ tests *before* the IRQ handler for that particular port is
registered. This is performed in serial8250_do_startup(). This function checks
whether IRQF_SHARED is configured and only then disables the IRQ line while
testing.

This test is performed upon each open() of the UART device. Imagine two UARTs
share the same IRQ line: On is already opened and the IRQ is active. When the
second UART is opened, the IRQ line has to be disabled while performing IRQ
tests. Otherwise an IRQ might handler might be invoked, but the IRQ itself
cannot be handled, because the corresponding handler isn't registered,
yet. That's because the 8250 code uses a chain-handler and invokes the
corresponding port's IRQ handling routines himself.

Unfortunately this IRQF_SHARED flag isn't configured for UARTs probed via device
tree even if the IRQs are shared. This way, the actual and shared IRQ line isn't
disabled while performing tests and the kernel correctly detects a spurious
IRQ. So, adding this flag to the DT probe solves the issue.

Note: The UPF_SHARE_IRQ flag is configured unconditionally. Therefore, the
IRQF_SHARED flag can be set unconditionally as well.

Example stack trace by performing `echo 1 > /dev/ttyS2` on a non-patched system:

|irq 85: nobody cared (try booting with the "irqpoll" option)
| [...]
|handlers:
|[<ffff0000080fc628>] irq_default_primary_handler threaded [<ffff00000855fbb8>] serial8250_interrupt
|Disabling IRQ #85

---8<---8<---

But unfortunately didn't fix the root cause. Let's try again here by moving
IRQ flag assignment from serial_link_irq_chain() to serial8250_do_startup().

This should fix the similar issue reported for 8250_pnp case.

Since this change we don't need to have custom solutions in 8250_aspeed_vuart
and 8250_of drivers, thus, drop them.

Fixes: 1c2f04937b3e ("serial: 8250: add IRQ trigger support")
Reported-by: Li RongQing <lirongqing@baidu.com>
Cc: Kurt Kanzenbach <kurt@linutronix.de>
Cc: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Kurt Kanzenbach <kurt@linutronix.de>
Link: https://lore.kernel.org/r/20200211135559.85960-1-andriy.shevchenko@linux.intel.com
[Kurt: Backport to v4.9]
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/serial/8250/8250_core.c |    5 ++---
 drivers/tty/serial/8250/8250_port.c |    4 ++++
 2 files changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -181,7 +181,7 @@ static int serial_link_irq_chain(struct
 	struct hlist_head *h;
 	struct hlist_node *n;
 	struct irq_info *i;
-	int ret, irq_flags = up->port.flags & UPF_SHARE_IRQ ? IRQF_SHARED : 0;
+	int ret;
 
 	mutex_lock(&hash_mutex);
 
@@ -216,9 +216,8 @@ static int serial_link_irq_chain(struct
 		INIT_LIST_HEAD(&up->list);
 		i->head = &up->list;
 		spin_unlock_irq(&i->lock);
-		irq_flags |= up->port.irqflags;
 		ret = request_irq(up->port.irq, serial8250_interrupt,
-				  irq_flags, "serial", i);
+				  up->port.irqflags, "serial", i);
 		if (ret < 0)
 			serial_do_unlink(i, up);
 	}
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2199,6 +2199,10 @@ int serial8250_do_startup(struct uart_po
 		}
 	}
 
+	/* Check if we need to have shared IRQs */
+	if (port->irq && (up->port.flags & UPF_SHARE_IRQ))
+		up->port.irqflags |= IRQF_SHARED;
+
 	if (port->irq) {
 		unsigned char iir1;
 		/*

[PATCH 4.9 39/88] include/linux/bitops.h: introduce BITS_PER_TYPE

[Greg Kroah-Hartman]

From: Chris Wilson <chris@chris-wilson.co.uk>

commit 9144d75e22cad3c89e6b2ccab551db9ee28d250a upstream.

net_dim.h has a rather useful extension to BITS_PER_BYTE to compute the
number of bits in a type (BITS_PER_BYTE * sizeof(T)), so promote the macro
to bitops.h, alongside BITS_PER_BYTE, for wider usage.

Link: http://lkml.kernel.org/r/20180706094458.14116-1-chris@chris-wilson.co.uk
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Andy Gospodarek <gospo@broadcom.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[only take the bitops.h portion for stable kernels - gregkh]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/linux/bitops.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -3,7 +3,8 @@
 #include <asm/types.h>
 #include <linux/bits.h>
 
-#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
+#define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE)
+#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_TYPE(long))
 
 extern unsigned int __sw_hweight8(unsigned int w);
 extern unsigned int __sw_hweight16(unsigned int w);

[PATCH 4.9 40/88] net: netlink: cap max groups which will be considered in netlink_bind()

[Greg Kroah-Hartman]

From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>

commit 3a20773beeeeadec41477a5ba872175b778ff752 upstream.

Since nl_groups is a u32 we can't bind more groups via ->bind
(netlink_bind) call, but netlink has supported more groups via
setsockopt() for a long time and thus nlk->ngroups could be over 32.
Recently I added support for per-vlan notifications and increased the
groups to 33 for NETLINK_ROUTE which exposed an old bug in the
netlink_bind() code causing out-of-bounds access on archs where unsigned
long is 32 bits via test_bit() on a local variable. Fix this by capping the
maximum groups in netlink_bind() to BITS_PER_TYPE(u32), effectively
capping them at 32 which is the minimum of allocated groups and the
maximum groups which can be bound via netlink_bind().

CC: Christophe Leroy <christophe.leroy@c-s.fr>
CC: Richard Guy Briggs <rgb@redhat.com>
Fixes: 4f520900522f ("netlink: have netlink per-protocol bind function return an error code.")
Reported-by: Erhard F. <erhard_f@mailbox.org>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/netlink/af_netlink.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1003,7 +1003,8 @@ static int netlink_bind(struct socket *s
 	if (nlk->netlink_bind && groups) {
 		int group;
 
-		for (group = 0; group < nlk->ngroups; group++) {
+		/* nl_groups is a u32, so cap the maximum groups we can bind */
+		for (group = 0; group < BITS_PER_TYPE(u32); group++) {
 			if (!test_bit(group, &groups))
 				continue;
 			err = nlk->netlink_bind(net, group + 1);
@@ -1022,7 +1023,7 @@ static int netlink_bind(struct socket *s
 			netlink_insert(sk, nladdr->nl_pid) :
 			netlink_autobind(sock);
 		if (err) {
-			netlink_undo_bind(nlk->ngroups, groups, sk);
+			netlink_undo_bind(BITS_PER_TYPE(u32), groups, sk);
 			return err;
 		}
 	}

[PATCH 4.9 41/88] net: ena: make ena rxfh support ETH_RSS_HASH_NO_CHANGE

[Greg Kroah-Hartman]

From: Arthur Kiyanovski <akiyano@amazon.com>

commit 470793a78ce344bd53d31e0c2d537f71ba957547 upstream.

As the name suggests ETH_RSS_HASH_NO_CHANGE is received upon changing
the key or indirection table using ethtool while keeping the same hash
function.

Also add a function for retrieving the current hash function from
the ena-com layer.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: Saeed Bshara <saeedb@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/ethernet/amazon/ena/ena_com.c     |    5 +++++
 drivers/net/ethernet/amazon/ena/ena_com.h     |    8 ++++++++
 drivers/net/ethernet/amazon/ena/ena_ethtool.c |    3 +++
 3 files changed, 16 insertions(+)

--- a/drivers/net/ethernet/amazon/ena/ena_com.c
+++ b/drivers/net/ethernet/amazon/ena/ena_com.c
@@ -857,6 +857,11 @@ static void ena_com_hash_key_fill_defaul
 	hash_key->keys_num = sizeof(hash_key->key) / sizeof(u32);
 }
 
+int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev)
+{
+	return ena_dev->rss.hash_func;
+}
+
 static int ena_com_hash_key_allocate(struct ena_com_dev *ena_dev)
 {
 	struct ena_rss *rss = &ena_dev->rss;
--- a/drivers/net/ethernet/amazon/ena/ena_com.h
+++ b/drivers/net/ethernet/amazon/ena/ena_com.h
@@ -623,6 +623,14 @@ int ena_com_rss_init(struct ena_com_dev
  */
 void ena_com_rss_destroy(struct ena_com_dev *ena_dev);
 
+/* ena_com_get_current_hash_function - Get RSS hash function
+ * @ena_dev: ENA communication layer struct
+ *
+ * Return the current hash function.
+ * @return: 0 or one of the ena_admin_hash_functions values.
+ */
+int ena_com_get_current_hash_function(struct ena_com_dev *ena_dev);
+
 /* ena_com_fill_hash_function - Fill RSS hash function
  * @ena_dev: ENA communication layer struct
  * @func: The hash function (Toeplitz or crc)
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -751,6 +751,9 @@ static int ena_set_rxfh(struct net_devic
 	}
 
 	switch (hfunc) {
+	case ETH_RSS_HASH_NO_CHANGE:
+		func = ena_com_get_current_hash_function(ena_dev);
+		break;
 	case ETH_RSS_HASH_TOP:
 		func = ENA_ADMIN_TOEPLITZ;
 		break;

[PATCH 4.9 42/88] namei: only return -ECHILD from follow_dotdot_rcu()

[Greg Kroah-Hartman]

From: Aleksa Sarai <cyphar@cyphar.com>

commit 2b98149c2377bff12be5dd3ce02ae0506e2dd613 upstream.

It's over-zealous to return hard errors under RCU-walk here, given that
a REF-walk will be triggered for all other cases handling ".." under
RCU.

The original purpose of this check was to ensure that if a rename occurs
such that a directory is moved outside of the bind-mount which the
resolution started in, it would be detected and blocked to avoid being
able to mess with paths outside of the bind-mount. However, triggering a
new REF-walk is just as effective a solution.

Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Fixes: 397d425dc26d ("vfs: Test for and handle paths that are unreachable from their mnt_root")
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/namei.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1370,7 +1370,7 @@ static int follow_dotdot_rcu(struct name
 			nd->path.dentry = parent;
 			nd->seq = seq;
 			if (unlikely(!path_connected(&nd->path)))
-				return -ENOENT;
+				return -ECHILD;
 			break;
 		} else {
 			struct mount *mnt = real_mount(nd->path.mnt);

[PATCH 4.9 43/88] KVM: Check for a bad hva before dropping into the ghc slow path

[Greg Kroah-Hartman]

From: Sean Christopherson <sean.j.christopherson@intel.com>

commit fcfbc617547fc6d9552cb6c1c563b6a90ee98085 upstream.

When reading/writing using the guest/host cache, check for a bad hva
before checking for a NULL memslot, which triggers the slow path for
handing cross-page accesses.  Because the memslot is nullified on error
by __kvm_gfn_to_hva_cache_init(), if the bad hva is encountered after
crossing into a new page, then the kvm_{read,write}_guest() slow path
could potentially write/access the first chunk prior to detecting the
bad hva.

Arguably, performing a partial access is semantically correct from an
architectural perspective, but that behavior is certainly not intended.
In the original implementation, memslot was not explicitly nullified
and therefore the partial access behavior varied based on whether the
memslot itself was null, or if the hva was simply bad.  The current
behavior was introduced as a seemingly unintentional side effect in
commit f1b9dd5eb86c ("kvm: Disallow wraparound in
kvm_gfn_to_hva_cache_init"), which justified the change with "since some
callers don't check the return code from this function, it sit seems
prudent to clear ghc->memslot in the event of an error".

Regardless of intent, the partial access is dependent on _not_ checking
the result of the cache initialization, which is arguably a bug in its
own right, at best simply weird.

Fixes: 8f964525a121 ("KVM: Allow cross page reads and writes from cached translations.")
Cc: Jim Mattson <jmattson@google.com>
Cc: Andrew Honig <ahonig@google.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>

---
 virt/kvm/kvm_main.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2045,12 +2045,12 @@ int kvm_write_guest_cached(struct kvm *k
 	if (slots->generation != ghc->generation)
 		kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len);
 
-	if (unlikely(!ghc->memslot))
-		return kvm_write_guest(kvm, ghc->gpa, data, len);
-
 	if (kvm_is_error_hva(ghc->hva))
 		return -EFAULT;
 
+	if (unlikely(!ghc->memslot))
+		return kvm_write_guest(kvm, ghc->gpa, data, len);
+
 	r = __copy_to_user((void __user *)ghc->hva, data, len);
 	if (r)
 		return -EFAULT;
@@ -2071,12 +2071,12 @@ int kvm_read_guest_cached(struct kvm *kv
 	if (slots->generation != ghc->generation)
 		kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len);
 
-	if (unlikely(!ghc->memslot))
-		return kvm_read_guest(kvm, ghc->gpa, data, len);
-
 	if (kvm_is_error_hva(ghc->hva))
 		return -EFAULT;
 
+	if (unlikely(!ghc->memslot))
+		return kvm_read_guest(kvm, ghc->gpa, data, len);
+
 	r = __copy_from_user(data, (void __user *)ghc->hva, len);
 	if (r)
 		return -EFAULT;

[PATCH 4.9 44/88] slip: stop double free sl->dev in slip_open

[Greg Kroah-Hartman]

From: yangerkun <yangerkun@huawei.com>

After include 3b5a39979daf ("slip: Fix memory leak in slip_open error path")
and e58c19124189 ("slip: Fix use-after-free Read in slip_open") with 4.4.y/4.9.y.
We will trigger a bug since we can double free sl->dev in slip_open. Actually,
we should backport cf124db566e6 ("net: Fix inconsistent teardown and release
of private netdev state.") too since it has delete free_netdev from sl_free_netdev.
Fix it by delete free_netdev from slip_open.

Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/slip/slip.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -868,7 +868,6 @@ err_free_chan:
 	tty->disc_data = NULL;
 	clear_bit(SLF_INUSE, &sl->flags);
 	sl_free_netdev(sl->dev);
-	free_netdev(sl->dev);
 
 err_exit:
 	rtnl_unlock();

[PATCH 4.9 45/88] tuntap: correctly set SOCKWQ_ASYNC_NOSPACE

[Greg Kroah-Hartman]

From: Jason Wang <jasowang@redhat.com>

commit 2f3ab6221e4c87960347d65c7cab9bd917d1f637 upstream.

When link is down, writes to the device might fail with
-EIO. Userspace needs an indication when the status is resolved.  As a
fix, tun_net_open() attempts to wake up writers - but that is only
effective if SOCKWQ_ASYNC_NOSPACE has been set in the past. This is
not the case of vhost_net which only poll for EPOLLOUT after it meets
errors during sendmsg().

This patch fixes this by making sure SOCKWQ_ASYNC_NOSPACE is set when
socket is not writable or device is down to guarantee EPOLLOUT will be
raised in either tun_chr_poll() or tun_sock_write_space() after device
is up.

Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Eric Dumazet <edumazet@google.com>
Fixes: 1bd4978a88ac2 ("tun: honor IFF_UP in tun_get_user()")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com>

---
 drivers/net/tun.c |   19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1106,6 +1106,13 @@ static void tun_net_init(struct net_devi
 	}
 }
 
+static bool tun_sock_writeable(struct tun_struct *tun, struct tun_file *tfile)
+{
+	struct sock *sk = tfile->socket.sk;
+
+	return (tun->dev->flags & IFF_UP) && sock_writeable(sk);
+}
+
 /* Character device part */
 
 /* Poll */
@@ -1128,10 +1135,14 @@ static unsigned int tun_chr_poll(struct
 	if (!skb_array_empty(&tfile->tx_array))
 		mask |= POLLIN | POLLRDNORM;
 
-	if (tun->dev->flags & IFF_UP &&
-	    (sock_writeable(sk) ||
-	     (!test_and_set_bit(SOCKWQ_ASYNC_NOSPACE, &sk->sk_socket->flags) &&
-	      sock_writeable(sk))))
+	/* Make sure SOCKWQ_ASYNC_NOSPACE is set if not writable to
+	 * guarantee EPOLLOUT to be raised by either here or
+	 * tun_sock_write_space(). Then process could get notification
+	 * after it writes to a down device and meets -EIO.
+	 */
+	if (tun_sock_writeable(tun, tfile) ||
+	    (!test_and_set_bit(SOCKWQ_ASYNC_NOSPACE, &sk->sk_socket->flags) &&
+	     tun_sock_writeable(tun, tfile)))
 		mask |= POLLOUT | POLLWRNORM;
 
 	if (tun->dev->reg_state != NETREG_REGISTERED)

[PATCH 4.9 46/88] drivers: net: xgene: Fix the order of the arguments of alloc_etherdev_mqs()

[Greg Kroah-Hartman]

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

commit 5a44c71ccda60a50073c5d7fe3f694cdfa3ab0c2 upstream.

'alloc_etherdev_mqs()' expects first 'tx', then 'rx'. The semantic here
looks reversed.

Reorder the arguments passed to 'alloc_etherdev_mqs()' in order to keep
the correct semantic.

In fact, this is a no-op because both XGENE_NUM_[RT]X_RING are 8.

Fixes: 107dec2749fe ("drivers: net: xgene: Add support for multiple queues")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -1711,7 +1711,7 @@ static int xgene_enet_probe(struct platf
 	int ret;
 
 	ndev = alloc_etherdev_mqs(sizeof(struct xgene_enet_pdata),
-				  XGENE_NUM_RX_RING, XGENE_NUM_TX_RING);
+				  XGENE_NUM_TX_RING, XGENE_NUM_RX_RING);
 	if (!ndev)
 		return -ENOMEM;
 

[PATCH 4.9 47/88] perf hists browser: Restore ESC as "Zoom out" of DSO/thread/etc

[Greg Kroah-Hartman]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

commit 3f7774033e6820d25beee5cf7aefa11d4968b951 upstream.

We need to set actions->ms.map since 599a2f38a989 ("perf hists browser:
Check sort keys before hot key actions"), as in that patch we bail out
if map is NULL.

Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Fixes: 599a2f38a989 ("perf hists browser: Check sort keys before hot key actions")
Link: https://lkml.kernel.org/n/tip-wp1ssoewy6zihwwexqpohv0j@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 tools/perf/ui/browsers/hists.c |    1 +
 1 file changed, 1 insertion(+)

--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -2930,6 +2930,7 @@ static int perf_evsel__hists_browse(stru
 
 				continue;
 			}
+			actions->ms.map = map;
 			top = pstack__peek(browser->pstack);
 			if (top == &browser->hists->dso_filter) {
 				/*

[PATCH 4.9 48/88] mm/huge_memory.c: use head to check huge zero page

[Greg Kroah-Hartman]

From: Wei Yang <richardw.yang@linux.intel.com>

commit cb829624867b5ab10bc6a7036d183b1b82bfe9f8 upstream.

The page could be a tail page, if this is the case, this BUG_ON will
never be triggered.

Link: http://lkml.kernel.org/r/20200110032610.26499-1-richardw.yang@linux.intel.com
Fixes: e9b61f19858a ("thp: reintroduce split_huge_page()")

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.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>

---
 mm/huge_memory.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2095,7 +2095,7 @@ int split_huge_page_to_list(struct page
 	unsigned long flags;
 	pgoff_t end;
 
-	VM_BUG_ON_PAGE(is_huge_zero_page(page), page);
+	VM_BUG_ON_PAGE(is_huge_zero_page(head), head);
 	VM_BUG_ON_PAGE(!PageLocked(page), page);
 	VM_BUG_ON_PAGE(!PageSwapBacked(page), page);
 	VM_BUG_ON_PAGE(!PageCompound(page), page);

[PATCH 4.9 49/88] audit: always check the netlink payload length in audit_receive_msg()

[Greg Kroah-Hartman]

From: Paul Moore <paul@paul-moore.com>

[ Upstream commit 756125289285f6e55a03861bf4b6257aa3d19a93 ]

This patch ensures that we always check the netlink payload length
in audit_receive_msg() before we take any action on the payload
itself.

Cc: stable@vger.kernel.org
Reported-by: syzbot+399c44bf1f43b8747403@syzkaller.appspotmail.com
Reported-by: syzbot+e4b12d8d202701f08b6d@syzkaller.appspotmail.com
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/audit.c | 40 +++++++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 19 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index 3461a3d874fed..53dcaa3b67bcf 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -751,13 +751,11 @@ static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature
 	audit_log_end(ab);
 }
 
-static int audit_set_feature(struct sk_buff *skb)
+static int audit_set_feature(struct audit_features *uaf)
 {
-	struct audit_features *uaf;
 	int i;
 
 	BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > ARRAY_SIZE(audit_feature_names));
-	uaf = nlmsg_data(nlmsg_hdr(skb));
 
 	/* if there is ever a version 2 we should handle that here */
 
@@ -823,6 +821,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 {
 	u32			seq;
 	void			*data;
+	int			data_len;
 	int			err;
 	struct audit_buffer	*ab;
 	u16			msg_type = nlh->nlmsg_type;
@@ -846,6 +845,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	}
 	seq  = nlh->nlmsg_seq;
 	data = nlmsg_data(nlh);
+	data_len = nlmsg_len(nlh);
 
 	switch (msg_type) {
 	case AUDIT_GET: {
@@ -867,7 +867,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		struct audit_status	s;
 		memset(&s, 0, sizeof(s));
 		/* guard against past and future API changes */
-		memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
+		memcpy(&s, data, min_t(size_t, sizeof(s), data_len));
 		if (s.mask & AUDIT_STATUS_ENABLED) {
 			err = audit_set_enabled(s.enabled);
 			if (err < 0)
@@ -930,7 +930,9 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 			return err;
 		break;
 	case AUDIT_SET_FEATURE:
-		err = audit_set_feature(skb);
+		if (data_len < sizeof(struct audit_features))
+			return -EINVAL;
+		err = audit_set_feature(data);
 		if (err)
 			return err;
 		break;
@@ -942,6 +944,8 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 
 		err = audit_filter(msg_type, AUDIT_FILTER_USER);
 		if (err == 1) { /* match or error */
+			char *str = data;
+
 			err = 0;
 			if (msg_type == AUDIT_USER_TTY) {
 				err = tty_audit_push();
@@ -950,19 +954,17 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 			}
 			mutex_unlock(&audit_cmd_mutex);
 			audit_log_common_recv_msg(&ab, msg_type);
-			if (msg_type != AUDIT_USER_TTY)
+			if (msg_type != AUDIT_USER_TTY) {
+				/* ensure NULL termination */
+				str[data_len - 1] = '\0';
 				audit_log_format(ab, " msg='%.*s'",
 						 AUDIT_MESSAGE_TEXT_MAX,
-						 (char *)data);
-			else {
-				int size;
-
+						 str);
+			} else {
 				audit_log_format(ab, " data=");
-				size = nlmsg_len(nlh);
-				if (size > 0 &&
-				    ((unsigned char *)data)[size - 1] == '\0')
-					size--;
-				audit_log_n_untrustedstring(ab, data, size);
+				if (data_len > 0 && str[data_len - 1] == '\0')
+					data_len--;
+				audit_log_n_untrustedstring(ab, str, data_len);
 			}
 			audit_set_portid(ab, NETLINK_CB(skb).portid);
 			audit_log_end(ab);
@@ -971,7 +973,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 		break;
 	case AUDIT_ADD_RULE:
 	case AUDIT_DEL_RULE:
-		if (nlmsg_len(nlh) < sizeof(struct audit_rule_data))
+		if (data_len < sizeof(struct audit_rule_data))
 			return -EINVAL;
 		if (audit_enabled == AUDIT_LOCKED) {
 			audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE);
@@ -980,7 +982,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 			return -EPERM;
 		}
 		err = audit_rule_change(msg_type, NETLINK_CB(skb).portid,
-					   seq, data, nlmsg_len(nlh));
+					   seq, data, data_len);
 		break;
 	case AUDIT_LIST_RULES:
 		err = audit_list_rules_send(skb, seq);
@@ -994,7 +996,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 	case AUDIT_MAKE_EQUIV: {
 		void *bufp = data;
 		u32 sizes[2];
-		size_t msglen = nlmsg_len(nlh);
+		size_t msglen = data_len;
 		char *old, *new;
 
 		err = -EINVAL;
@@ -1070,7 +1072,7 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 
 		memset(&s, 0, sizeof(s));
 		/* guard against past and future API changes */
-		memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh)));
+		memcpy(&s, data, min_t(size_t, sizeof(s), data_len));
 		/* check if new data is valid */
 		if ((s.enabled != 0 && s.enabled != 1) ||
 		    (s.log_passwd != 0 && s.log_passwd != 1))
-- 
2.20.1

[PATCH 4.9 50/88] vhost: Check docket sk_family instead of call getname

[Greg Kroah-Hartman]

From: Eugenio Pérez <eperezma@redhat.com>

[ Upstream commit 42d84c8490f9f0931786f1623191fcab397c3d64 ]

Doing so, we save one call to get data we already have in the struct.

Also, since there is no guarantee that getname use sockaddr_ll
parameter beyond its size, we add a little bit of security here.
It should do not do beyond MAX_ADDR_LEN, but syzbot found that
ax25_getname writes more (72 bytes, the size of full_sockaddr_ax25,
versus 20 + 32 bytes of sockaddr_ll + MAX_ADDR_LEN in syzbot repro).

Fixes: 3a4d5c94e9593 ("vhost_net: a kernel-level virtio server")
Reported-by: syzbot+f2a62d07a5198c819c7b@syzkaller.appspotmail.com
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/vhost/net.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index dd8798bf88e7c..861f43f8f9cea 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -914,11 +914,7 @@ static int vhost_net_release(struct inode *inode, struct file *f)
 
 static struct socket *get_raw_socket(int fd)
 {
-	struct {
-		struct sockaddr_ll sa;
-		char  buf[MAX_ADDR_LEN];
-	} uaddr;
-	int uaddr_len = sizeof uaddr, r;
+	int r;
 	struct socket *sock = sockfd_lookup(fd, &r);
 
 	if (!sock)
@@ -930,12 +926,7 @@ static struct socket *get_raw_socket(int fd)
 		goto err;
 	}
 
-	r = sock->ops->getname(sock, (struct sockaddr *)&uaddr.sa,
-			       &uaddr_len, 0);
-	if (r)
-		goto err;
-
-	if (uaddr.sa.sll_family != AF_PACKET) {
+	if (sock->sk->sk_family != AF_PACKET) {
 		r = -EPFNOSUPPORT;
 		goto err;
 	}
-- 
2.20.1

[PATCH 4.9 51/88] serial: ar933x_uart: set UART_CS_{RX,TX}_READY_ORIDE

[Greg Kroah-Hartman]

From: Daniel Golle <daniel@makrotopia.org>

[ Upstream commit 87c5cbf71ecbb9e289d60a2df22eb686c70bf196 ]

On AR934x this UART is usually not initialized by the bootloader
as it is only used as a secondary serial port while the primary
UART is a newly introduced NS16550-compatible.
In order to make use of the ar933x-uart on AR934x without RTS/CTS
hardware flow control, one needs to set the
UART_CS_{RX,TX}_READY_ORIDE bits as other than on AR933x where this
UART is used as primary/console, the bootloader on AR934x typically
doesn't set those bits.
Setting them explicitely on AR933x should not do any harm, so just
set them unconditionally.

Tested-by: Chuanhong Guo <gch981213@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://lore.kernel.org/r/20200207095335.GA179836@makrotopia.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/tty/serial/ar933x_uart.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index d4462512605b5..246f4aab74075 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -289,6 +289,10 @@ static void ar933x_uart_set_termios(struct uart_port *port,
 	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
 			    AR933X_UART_CS_HOST_INT_EN);
 
+	/* enable RX and TX ready overide */
+	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
+		AR933X_UART_CS_TX_READY_ORIDE | AR933X_UART_CS_RX_READY_ORIDE);
+
 	/* reenable the UART */
 	ar933x_uart_rmw(up, AR933X_UART_CS_REG,
 			AR933X_UART_CS_IF_MODE_M << AR933X_UART_CS_IF_MODE_S,
@@ -421,6 +425,10 @@ static int ar933x_uart_startup(struct uart_port *port)
 	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
 			    AR933X_UART_CS_HOST_INT_EN);
 
+	/* enable RX and TX ready overide */
+	ar933x_uart_rmw_set(up, AR933X_UART_CS_REG,
+		AR933X_UART_CS_TX_READY_ORIDE | AR933X_UART_CS_RX_READY_ORIDE);
+
 	/* Enable RX interrupts */
 	up->ier = AR933X_UART_INT_RX_VALID;
 	ar933x_uart_write(up, AR933X_UART_INT_EN_REG, up->ier);
-- 
2.20.1

[PATCH 4.9 52/88] usb: gadget: composite: Support more than 500mA MaxPower

[Greg Kroah-Hartman]

From: Jack Pham <jackp@codeaurora.org>

[ Upstream commit a2035411fa1d1206cea7d5dfe833e78481844a76 ]

USB 3.x SuperSpeed peripherals can draw up to 900mA of VBUS power
when in configured state. However, if a configuration wanting to
take advantage of this is added with MaxPower greater than 500
(currently possible if using a ConfigFS gadget) the composite
driver fails to accommodate this for a couple reasons:

 - usb_gadget_vbus_draw() when called from set_config() and
   composite_resume() will be passed the MaxPower value without
   regard for the current connection speed, resulting in a
   violation for USB 2.0 since the max is 500mA.

 - the bMaxPower of the configuration descriptor would be
   incorrectly encoded, again if the connection speed is only
   at USB 2.0 or below, likely wrapping around U8_MAX since
   the 2mA multiplier corresponds to a maximum of 510mA.

Fix these by adding checks against the current gadget->speed
when the c->MaxPower value is used (set_config() and
composite_resume()) and appropriately limit based on whether
it is currently at a low-/full-/high- or super-speed connection.

Because 900 is not divisible by 8, with the round-up division
currently used in encode_bMaxPower() a MaxPower of 900mA will
result in an encoded value of 0x71. When a host stack (including
Linux and Windows) enumerates this on a single port root hub, it
reads this value back and decodes (multiplies by 8) to get 904mA
which is strictly greater than 900mA that is typically budgeted
for that port, causing it to reject the configuration. Instead,
we should be using the round-down behavior of normal integral
division so that 900 / 8 -> 0x70 or 896mA to stay within range.
And we might as well change it for the high/full/low case as well
for consistency.

N.B. USB 3.2 Gen N x 2 allows for up to 1500mA but there doesn't
seem to be any any peripheral controller supported by Linux that
does two lane operation, so for now keeping the clamp at 900
should be fine.

Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/gadget/composite.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 4d7df2f6caf5b..3a0452ff1a565 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -438,9 +438,13 @@ static u8 encode_bMaxPower(enum usb_device_speed speed,
 	if (!val)
 		return 0;
 	if (speed < USB_SPEED_SUPER)
-		return DIV_ROUND_UP(val, 2);
+		return min(val, 500U) / 2;
 	else
-		return DIV_ROUND_UP(val, 8);
+		/*
+		 * USB 3.x supports up to 900mA, but since 900 isn't divisible
+		 * by 8 the integral division will effectively cap to 896mA.
+		 */
+		return min(val, 900U) / 8;
 }
 
 static int config_buf(struct usb_configuration *config,
@@ -833,6 +837,10 @@ static int set_config(struct usb_composite_dev *cdev,
 
 	/* when we return, be sure our power usage is valid */
 	power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW;
+	if (gadget->speed < USB_SPEED_SUPER)
+		power = min(power, 500U);
+	else
+		power = min(power, 900U);
 done:
 	usb_gadget_vbus_draw(gadget, power);
 	if (result >= 0 && cdev->delayed_status)
@@ -2272,7 +2280,7 @@ void composite_resume(struct usb_gadget *gadget)
 {
 	struct usb_composite_dev	*cdev = get_gadget_data(gadget);
 	struct usb_function		*f;
-	u16				maxpower;
+	unsigned			maxpower;
 
 	/* REVISIT:  should we have config level
 	 * suspend/resume callbacks?
@@ -2286,10 +2294,14 @@ void composite_resume(struct usb_gadget *gadget)
 				f->resume(f);
 		}
 
-		maxpower = cdev->config->MaxPower;
+		maxpower = cdev->config->MaxPower ?
+			cdev->config->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW;
+		if (gadget->speed < USB_SPEED_SUPER)
+			maxpower = min(maxpower, 500U);
+		else
+			maxpower = min(maxpower, 900U);
 
-		usb_gadget_vbus_draw(gadget, maxpower ?
-			maxpower : CONFIG_USB_GADGET_VBUS_DRAW);
+		usb_gadget_vbus_draw(gadget, maxpower);
 	}
 
 	cdev->suspended = 0;
-- 
2.20.1

[PATCH 4.9 53/88] usb: gadget: ffs: ffs_aio_cancel(): Save/restore IRQ flags

[Greg Kroah-Hartman]

From: Lars-Peter Clausen <lars@metafoo.de>

[ Upstream commit 43d565727a3a6fd24e37c7c2116475106af71806 ]

ffs_aio_cancel() can be called from both interrupt and thread context. Make
sure that the current IRQ state is saved and restored by using
spin_{un,}lock_irq{save,restore}().

Otherwise undefined behavior might occur.

Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/gadget/function/f_fs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index d1278d2d544b4..b5747f1270a6d 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -1077,18 +1077,19 @@ static int ffs_aio_cancel(struct kiocb *kiocb)
 {
 	struct ffs_io_data *io_data = kiocb->private;
 	struct ffs_epfile *epfile = kiocb->ki_filp->private_data;
+	unsigned long flags;
 	int value;
 
 	ENTER();
 
-	spin_lock_irq(&epfile->ffs->eps_lock);
+	spin_lock_irqsave(&epfile->ffs->eps_lock, flags);
 
 	if (likely(io_data && io_data->ep && io_data->req))
 		value = usb_ep_dequeue(io_data->ep, io_data->req);
 	else
 		value = -EINVAL;
 
-	spin_unlock_irq(&epfile->ffs->eps_lock);
+	spin_unlock_irqrestore(&epfile->ffs->eps_lock, flags);
 
 	return value;
 }
-- 
2.20.1

[PATCH 4.9 54/88] usb: gadget: serial: fix Tx stall after buffer overflow

[Greg Kroah-Hartman]

From: Sergey Organov <sorganov@gmail.com>

[ Upstream commit e4bfded56cf39b8d02733c1e6ef546b97961e18a ]

Symptom: application opens /dev/ttyGS0 and starts sending (writing) to
it while either USB cable is not connected, or nobody listens on the
other side of the cable. If driver circular buffer overflows before
connection is established, no data will be written to the USB layer
until/unless /dev/ttyGS0 is closed and re-opened again by the
application (the latter besides having no means of being notified about
the event of establishing of the connection.)

Fix: on open and/or connect, kick Tx to flush circular buffer data to
USB layer.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/gadget/function/u_serial.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 510a54f889635..5d7d0f2e80a5e 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -715,8 +715,10 @@ static int gs_start_io(struct gs_port *port)
 	port->n_read = 0;
 	started = gs_start_rx(port);
 
-	/* unblock any pending writes into our circular buffer */
 	if (started) {
+		gs_start_tx(port);
+		/* Unblock any pending writes into our circular buffer, in case
+		 * we didn't in gs_start_tx() */
 		tty_wakeup(port->port.tty);
 	} else {
 		gs_free_requests(ep, head, &port->read_allocated);
-- 
2.20.1

[PATCH 4.9 55/88] drm: msm: Fix return type of dsi_mgr_connector_mode_valid for kCFI

[Greg Kroah-Hartman]

From: John Stultz <john.stultz@linaro.org>

[ Upstream commit 7fd2dfc3694922eb7ace4801b7208cf9f62ebc7d ]

I was hitting kCFI crashes when building with clang, and after
some digging finally narrowed it down to the
dsi_mgr_connector_mode_valid() function being implemented as
returning an int, instead of an enum drm_mode_status.

This patch fixes it, and appeases the opaque word of the kCFI
gods (seriously, clang inlining everything makes the kCFI
backtraces only really rough estimates of where things went
wrong).

Thanks as always to Sami for his help narrowing this down.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <sean@poorly.run>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Alistair Delva <adelva@google.com>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: freedreno@lists.freedesktop.org
Cc: clang-built-linux@googlegroups.com
Signed-off-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/msm/dsi/dsi_manager.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index c8d1f19c9a6d9..10d49d43c17eb 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -306,7 +306,7 @@ static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
 	return num;
 }
 
-static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
+static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
 				struct drm_display_mode *mode)
 {
 	int id = dsi_mgr_connector_get_id(connector);
-- 
2.20.1

[PATCH 4.9 56/88] drm/msm/dsi: save pll state before dsi host is powered off

[Greg Kroah-Hartman]

From: Harigovindan P <harigovi@codeaurora.org>

[ Upstream commit a1028dcfd0dd97884072288d0c8ed7f30399b528 ]

Save pll state before dsi host is powered off. Without this change
some register values gets resetted.

Signed-off-by: Harigovindan P <harigovi@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/msm/dsi/dsi_manager.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index 10d49d43c17eb..d46b9e75a8473 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -438,6 +438,7 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 	struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
 	struct mipi_dsi_host *host = msm_dsi->host;
 	struct drm_panel *panel = msm_dsi->panel;
+	struct msm_dsi_pll *src_pll;
 	bool is_dual_dsi = IS_DUAL_DSI();
 	int ret;
 
@@ -471,6 +472,10 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
 								id, ret);
 	}
 
+	/* Save PLL status if it is a clock source */
+	src_pll = msm_dsi_phy_get_pll(msm_dsi->phy);
+	msm_dsi_pll_save_state(src_pll);
+
 	ret = msm_dsi_host_power_off(host);
 	if (ret)
 		pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
-- 
2.20.1

[PATCH 4.9 57/88] net: ks8851-ml: Remove 8-bit bus accessors

[Greg Kroah-Hartman]

From: Marek Vasut <marex@denx.de>

[ Upstream commit 69233bba6543a37755158ca3382765387b8078df ]

This driver is mixing 8-bit and 16-bit bus accessors for reasons unknown,
however the speculation is that this was some sort of attempt to support
the 8-bit bus mode.

As per the KS8851-16MLL documentation, all two registers accessed via the
8-bit accessors are internally 16-bit registers, so reading them using
16-bit accessors is fine. The KS_CCR read can be converted to 16-bit read
outright, as it is already a concatenation of two 8-bit reads of that
register. The KS_RXQCR accesses are 8-bit only, however writing the top
8 bits of the register is OK as well, since the driver caches the entire
16-bit register value anyway.

Finally, the driver is not used by any hardware in the kernel right now.
The only hardware available to me is one with 16-bit bus, so I have no
way to test the 8-bit bus mode, however it is unlikely this ever really
worked anyway. If the 8-bit bus mode is ever required, it can be easily
added by adjusting the 16-bit accessors to do 2 consecutive accesses,
which is how this should have been done from the beginning.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Petr Stetiar <ynezz@true.cz>
Cc: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/micrel/ks8851_mll.c | 45 +++---------------------
 1 file changed, 5 insertions(+), 40 deletions(-)

diff --git a/drivers/net/ethernet/micrel/ks8851_mll.c b/drivers/net/ethernet/micrel/ks8851_mll.c
index 8dc1f0277117d..721f851674531 100644
--- a/drivers/net/ethernet/micrel/ks8851_mll.c
+++ b/drivers/net/ethernet/micrel/ks8851_mll.c
@@ -474,24 +474,6 @@ static int msg_enable;
  * chip is busy transferring packet data (RX/TX FIFO accesses).
  */
 
-/**
- * ks_rdreg8 - read 8 bit register from device
- * @ks	  : The chip information
- * @offset: The register address
- *
- * Read a 8bit register from the chip, returning the result
- */
-static u8 ks_rdreg8(struct ks_net *ks, int offset)
-{
-	u16 data;
-	u8 shift_bit = offset & 0x03;
-	u8 shift_data = (offset & 1) << 3;
-	ks->cmd_reg_cache = (u16) offset | (u16)(BE0 << shift_bit);
-	iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
-	data  = ioread16(ks->hw_addr);
-	return (u8)(data >> shift_data);
-}
-
 /**
  * ks_rdreg16 - read 16 bit register from device
  * @ks	  : The chip information
@@ -507,22 +489,6 @@ static u16 ks_rdreg16(struct ks_net *ks, int offset)
 	return ioread16(ks->hw_addr);
 }
 
-/**
- * ks_wrreg8 - write 8bit register value to chip
- * @ks: The chip information
- * @offset: The register address
- * @value: The value to write
- *
- */
-static void ks_wrreg8(struct ks_net *ks, int offset, u8 value)
-{
-	u8  shift_bit = (offset & 0x03);
-	u16 value_write = (u16)(value << ((offset & 1) << 3));
-	ks->cmd_reg_cache = (u16)offset | (BE0 << shift_bit);
-	iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
-	iowrite16(value_write, ks->hw_addr);
-}
-
 /**
  * ks_wrreg16 - write 16bit register value to chip
  * @ks: The chip information
@@ -642,8 +608,7 @@ static void ks_read_config(struct ks_net *ks)
 	u16 reg_data = 0;
 
 	/* Regardless of bus width, 8 bit read should always work.*/
-	reg_data = ks_rdreg8(ks, KS_CCR) & 0x00FF;
-	reg_data |= ks_rdreg8(ks, KS_CCR+1) << 8;
+	reg_data = ks_rdreg16(ks, KS_CCR);
 
 	/* addr/data bus are multiplexed */
 	ks->sharedbus = (reg_data & CCR_SHARED) == CCR_SHARED;
@@ -747,7 +712,7 @@ static inline void ks_read_qmu(struct ks_net *ks, u16 *buf, u32 len)
 
 	/* 1. set sudo DMA mode */
 	ks_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI);
-	ks_wrreg8(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_SDA) & 0xff);
+	ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
 
 	/* 2. read prepend data */
 	/**
@@ -764,7 +729,7 @@ static inline void ks_read_qmu(struct ks_net *ks, u16 *buf, u32 len)
 	ks_inblk(ks, buf, ALIGN(len, 4));
 
 	/* 4. reset sudo DMA Mode */
-	ks_wrreg8(ks, KS_RXQCR, ks->rc_rxqcr);
+	ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
 }
 
 /**
@@ -997,13 +962,13 @@ static void ks_write_qmu(struct ks_net *ks, u8 *pdata, u16 len)
 	ks->txh.txw[1] = cpu_to_le16(len);
 
 	/* 1. set sudo-DMA mode */
-	ks_wrreg8(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_SDA) & 0xff);
+	ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
 	/* 2. write status/lenth info */
 	ks_outblk(ks, ks->txh.txw, 4);
 	/* 3. write pkt data */
 	ks_outblk(ks, (u16 *)pdata, ALIGN(len, 4));
 	/* 4. reset sudo-DMA mode */
-	ks_wrreg8(ks, KS_RXQCR, ks->rc_rxqcr);
+	ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
 	/* 5. Enqueue Tx(move the pkt from TX buffer into TXQ) */
 	ks_wrreg16(ks, KS_TXQCR, TXQCR_METFE);
 	/* 6. wait until TXQCR_METFE is auto-cleared */
-- 
2.20.1

[PATCH 4.9 58/88] net: ks8851-ml: Fix 16-bit data access

[Greg Kroah-Hartman]

From: Marek Vasut <marex@denx.de>

[ Upstream commit edacb098ea9c31589276152f09b4439052c0f2b1 ]

The packet data written to and read from Micrel KSZ8851-16MLLI must be
byte-swapped in 16-bit mode, add this byte-swapping.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Petr Stetiar <ynezz@true.cz>
Cc: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/micrel/ks8851_mll.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/micrel/ks8851_mll.c b/drivers/net/ethernet/micrel/ks8851_mll.c
index 721f851674531..20356976b9772 100644
--- a/drivers/net/ethernet/micrel/ks8851_mll.c
+++ b/drivers/net/ethernet/micrel/ks8851_mll.c
@@ -515,7 +515,7 @@ static inline void ks_inblk(struct ks_net *ks, u16 *wptr, u32 len)
 {
 	len >>= 1;
 	while (len--)
-		*wptr++ = (u16)ioread16(ks->hw_addr);
+		*wptr++ = be16_to_cpu(ioread16(ks->hw_addr));
 }
 
 /**
@@ -529,7 +529,7 @@ static inline void ks_outblk(struct ks_net *ks, u16 *wptr, u32 len)
 {
 	len >>= 1;
 	while (len--)
-		iowrite16(*wptr++, ks->hw_addr);
+		iowrite16(cpu_to_be16(*wptr++), ks->hw_addr);
 }
 
 static void ks_disable_int(struct ks_net *ks)
-- 
2.20.1

[PATCH 4.9 59/88] net: ks8851-ml: Fix 16-bit IO operation

[Greg Kroah-Hartman]

From: Marek Vasut <marex@denx.de>

[ Upstream commit 58292104832fef6cb4a89f736012c0e0724c3442 ]

The Micrel KSZ8851-16MLLI datasheet DS00002357B page 12 states that
BE[3:0] signals are active high. This contradicts the measurements
of the behavior of the actual chip, where these signals behave as
active low. For example, to read the CIDER register, the bus must
expose 0xc0c0 during the address phase, which means BE[3:0]=4'b1100.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Petr Stetiar <ynezz@true.cz>
Cc: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/micrel/ks8851_mll.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/micrel/ks8851_mll.c b/drivers/net/ethernet/micrel/ks8851_mll.c
index 20356976b9772..d94e151cff12b 100644
--- a/drivers/net/ethernet/micrel/ks8851_mll.c
+++ b/drivers/net/ethernet/micrel/ks8851_mll.c
@@ -484,7 +484,7 @@ static int msg_enable;
 
 static u16 ks_rdreg16(struct ks_net *ks, int offset)
 {
-	ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02));
+	ks->cmd_reg_cache = (u16)offset | ((BE3 | BE2) >> (offset & 0x02));
 	iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
 	return ioread16(ks->hw_addr);
 }
@@ -499,7 +499,7 @@ static u16 ks_rdreg16(struct ks_net *ks, int offset)
 
 static void ks_wrreg16(struct ks_net *ks, int offset, u16 value)
 {
-	ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02));
+	ks->cmd_reg_cache = (u16)offset | ((BE3 | BE2) >> (offset & 0x02));
 	iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
 	iowrite16(value, ks->hw_addr);
 }
-- 
2.20.1

[PATCH 4.9 60/88] watchdog: da9062: do not ping the hw during stop()

[Greg Kroah-Hartman]

From: Marco Felsch <m.felsch@pengutronix.de>

[ Upstream commit e9a0e65eda3f78d0b04ec6136c591c000cbc3b76 ]

The da9062 hw has a minimum ping cool down phase of at least 200ms. The
driver takes that into account by setting the min_hw_heartbeat_ms to
300ms and the core guarantees that the hw limit is observed for the
ping() calls. But the core can't guarantee the required minimum ping
cool down phase if a stop() command is send immediately after the ping()
command. So it is not allowed to ping the watchdog within the stop()
command as the driver does. Remove the ping can be done without doubts
because the watchdog gets disabled anyway and a (re)start resets the
watchdog counter too.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200120091729.16256-1-m.felsch@pengutronix.de
[groeck: Updated description]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/watchdog/da9062_wdt.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/watchdog/da9062_wdt.c b/drivers/watchdog/da9062_wdt.c
index 7386111220d58..daeb645fcea8a 100644
--- a/drivers/watchdog/da9062_wdt.c
+++ b/drivers/watchdog/da9062_wdt.c
@@ -126,13 +126,6 @@ static int da9062_wdt_stop(struct watchdog_device *wdd)
 	struct da9062_watchdog *wdt = watchdog_get_drvdata(wdd);
 	int ret;
 
-	ret = da9062_reset_watchdog_timer(wdt);
-	if (ret) {
-		dev_err(wdt->hw->dev, "Failed to ping the watchdog (err = %d)\n",
-			ret);
-		return ret;
-	}
-
 	ret = regmap_update_bits(wdt->hw->regmap,
 				 DA9062AA_CONTROL_D,
 				 DA9062AA_TWDSCALE_MASK,
-- 
2.20.1

[PATCH 4.9 61/88] s390/cio: cio_ignore_proc_seq_next should increase position index

[Greg Kroah-Hartman]

From: Vasily Averin <vvs@virtuozzo.com>

[ Upstream commit 8b101a5e14f2161869636ff9cb4907b7749dc0c2 ]

if seq_file .next fuction does not change position index,
read after some lseek can generate unexpected output.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=206283
Link: https://lore.kernel.org/r/d44c53a7-9bc1-15c7-6d4a-0c10cb9dffce@virtuozzo.com
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/s390/cio/blacklist.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/s390/cio/blacklist.c b/drivers/s390/cio/blacklist.c
index 9082476b51db9..4e9f794176d35 100644
--- a/drivers/s390/cio/blacklist.c
+++ b/drivers/s390/cio/blacklist.c
@@ -302,8 +302,10 @@ static void *
 cio_ignore_proc_seq_next(struct seq_file *s, void *it, loff_t *offset)
 {
 	struct ccwdev_iter *iter;
+	loff_t p = *offset;
 
-	if (*offset >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
+	(*offset)++;
+	if (p >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
 		return NULL;
 	iter = it;
 	if (iter->devno == __MAX_SUBCHANNEL) {
@@ -313,7 +315,6 @@ cio_ignore_proc_seq_next(struct seq_file *s, void *it, loff_t *offset)
 			return NULL;
 	} else
 		iter->devno++;
-	(*offset)++;
 	return iter;
 }
 
-- 
2.20.1

[PATCH 4.9 62/88] x86/boot/compressed: Dont declare __force_order in kaslr_64.c

[Greg Kroah-Hartman]

From: H.J. Lu <hjl.tools@gmail.com>

[ Upstream commit df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc ]

GCC 10 changed the default to -fno-common, which leads to

    LD      arch/x86/boot/compressed/vmlinux
  ld: arch/x86/boot/compressed/pgtable_64.o:(.bss+0x0): multiple definition of `__force_order'; \
    arch/x86/boot/compressed/kaslr_64.o:(.bss+0x0): first defined here
  make[2]: *** [arch/x86/boot/compressed/Makefile:119: arch/x86/boot/compressed/vmlinux] Error 1

Since __force_order is already provided in pgtable_64.c, there is no
need to declare __force_order in kaslr_64.c.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200124181811.4780-1-hjl.tools@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/boot/compressed/pagetable.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/x86/boot/compressed/pagetable.c b/arch/x86/boot/compressed/pagetable.c
index 56589d0a804b1..2591f8f6d45f2 100644
--- a/arch/x86/boot/compressed/pagetable.c
+++ b/arch/x86/boot/compressed/pagetable.c
@@ -25,9 +25,6 @@
 #define __PAGE_OFFSET __PAGE_OFFSET_BASE
 #include "../../mm/ident_map.c"
 
-/* Used by pgtable.h asm code to force instruction serialization. */
-unsigned long __force_order;
-
 /* Used to track our page table allocation area. */
 struct alloc_pgt_data {
 	unsigned char *pgt_buf;
-- 
2.20.1

[PATCH 4.9 63/88] cifs: dont leak -EAGAIN for stat() during reconnect

[Greg Kroah-Hartman]

From: Ronnie Sahlberg <lsahlber@redhat.com>

commit fc513fac56e1b626ae48a74d7551d9c35c50129e upstream.

If from cifs_revalidate_dentry_attr() the SMB2/QUERY_INFO call fails with an
error, such as STATUS_SESSION_EXPIRED, causing the session to be reconnected
it is possible we will leak -EAGAIN back to the application even for
system calls such as stat() where this is not a valid error.

Fix this by re-trying the operation from within cifs_revalidate_dentry_attr()
if cifs_get_inode_info*() returns -EAGAIN.

This fixes stat() and possibly also other system calls that uses
cifs_revalidate_dentry*().

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/cifs/inode.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1990,6 +1990,7 @@ int cifs_revalidate_dentry_attr(struct d
 	struct inode *inode = d_inode(dentry);
 	struct super_block *sb = dentry->d_sb;
 	char *full_path = NULL;
+	int count = 0;
 
 	if (inode == NULL)
 		return -ENOENT;
@@ -2011,15 +2012,18 @@ int cifs_revalidate_dentry_attr(struct d
 		 full_path, inode, inode->i_count.counter,
 		 dentry, cifs_get_time(dentry), jiffies);
 
+again:
 	if (cifs_sb_master_tcon(CIFS_SB(sb))->unix_ext)
 		rc = cifs_get_inode_info_unix(&inode, full_path, sb, xid);
 	else
 		rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
 					 xid, NULL);
-
+	if (rc == -EAGAIN && count++ < 10)
+		goto again;
 out:
 	kfree(full_path);
 	free_xid(xid);
+
 	return rc;
 }
 

[PATCH 4.9 64/88] usb: storage: Add quirk for Samsung Fit flash

[Greg Kroah-Hartman]

From: Jim Lin <jilin@nvidia.com>

commit 86d92f5465958752481269348d474414dccb1552 upstream.

Current driver has 240 (USB2.0) and 2048 (USB3.0) as max_sectors,
e.g., /sys/bus/scsi/devices/0:0:0:0/max_sectors

If data access times out, driver error handling will issue a port
reset.
Sometimes Samsung Fit (090C:1000) flash disk will not respond to
later Set Address or Get Descriptor command.

Adding this quirk to limit max_sectors to 64 sectors to avoid issue
occurring.

Signed-off-by: Jim Lin <jilin@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1583158895-31342-1-git-send-email-jilin@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/storage/unusual_devs.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -1277,6 +1277,12 @@ UNUSUAL_DEV( 0x090a, 0x1200, 0x0000, 0x9
 		USB_SC_RBC, USB_PR_BULK, NULL,
 		0 ),
 
+UNUSUAL_DEV(0x090c, 0x1000, 0x1100, 0x1100,
+		"Samsung",
+		"Flash Drive FIT",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_MAX_SECTORS_64),
+
 /* aeb */
 UNUSUAL_DEV( 0x090c, 0x1132, 0x0000, 0xffff,
 		"Feiya",

[PATCH 4.9 65/88] usb: quirks: add NO_LPM quirk for Logitech Screen Share

[Greg Kroah-Hartman]

From: Dan Lazewatsky <dlaz@chromium.org>

commit b96ed52d781a2026d0c0daa5787c6f3d45415862 upstream.

LPM on the device appears to cause xHCI host controllers to claim
that there isn't enough bandwidth to support additional devices.

Signed-off-by: Dan Lazewatsky <dlaz@chromium.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Link: https://lore.kernel.org/r/20200226143438.1445-1-gustavo.padovan@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/core/quirks.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -86,6 +86,9 @@ static const struct usb_device_id usb_qu
 	/* Logitech PTZ Pro Camera */
 	{ USB_DEVICE(0x046d, 0x0853), .driver_info = USB_QUIRK_DELAY_INIT },
 
+	/* Logitech Screen Share */
+	{ USB_DEVICE(0x046d, 0x086c), .driver_info = USB_QUIRK_NO_LPM },
+
 	/* Logitech Quickcam Fusion */
 	{ USB_DEVICE(0x046d, 0x08c1), .driver_info = USB_QUIRK_RESET_RESUME },
 

[PATCH 4.9 66/88] usb: core: hub: do error out if usb_autopm_get_interface() fails

[Greg Kroah-Hartman]

From: Eugeniu Rosca <erosca@de.adit-jv.com>

commit 60e3f6e4ac5b0fda43dad01c32e09409ec710045 upstream.

Reviewing a fresh portion of coverity defects in USB core
(specifically CID 1458999), Alan Stern noted below in [1]:

On Tue, Feb 25, 2020 at 02:39:23PM -0500, Alan Stern wrote:
 > A revised search finds line 997 in drivers/usb/core/hub.c and lines
 > 216, 269 in drivers/usb/core/port.c.  (I didn't try looking in any
 > other directories.)  AFAICT all three of these should check the
 > return value, although a error message in the kernel log probably
 > isn't needed.

Factor out the usb_remove_device() change into a standalone patch to
allow conflict-free integration on top of the earliest stable branches.

[1] https://lore.kernel.org/lkml/Pine.LNX.4.44L0.2002251419120.1485-100000@iolanthe.rowland.org

Fixes: 253e05724f9230 ("USB: add a "remove hardware" sysfs attribute")
Cc: stable@vger.kernel.org # v2.6.33+
Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200226175036.14946-2-erosca@de.adit-jv.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/core/hub.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -954,13 +954,17 @@ int usb_remove_device(struct usb_device
 {
 	struct usb_hub *hub;
 	struct usb_interface *intf;
+	int ret;
 
 	if (!udev->parent)	/* Can't remove a root hub */
 		return -EINVAL;
 	hub = usb_hub_to_struct_hub(udev->parent);
 	intf = to_usb_interface(hub->intfdev);
 
-	usb_autopm_get_interface(intf);
+	ret = usb_autopm_get_interface(intf);
+	if (ret < 0)
+		return ret;
+
 	set_bit(udev->portnum, hub->removed_bits);
 	hub_port_logical_disconnect(hub, udev->portnum);
 	usb_autopm_put_interface(intf);

[PATCH 4.9 67/88] usb: core: port: do error out if usb_autopm_get_interface() fails

[Greg Kroah-Hartman]

From: Eugeniu Rosca <erosca@de.adit-jv.com>

commit 1f8b39bc99a31759e97a0428a5c3f64802c1e61d upstream.

Reviewing a fresh portion of coverity defects in USB core
(specifically CID 1458999), Alan Stern noted below in [1]:

On Tue, Feb 25, 2020 at 02:39:23PM -0500, Alan Stern wrote:
 > A revised search finds line 997 in drivers/usb/core/hub.c and lines
 > 216, 269 in drivers/usb/core/port.c.  (I didn't try looking in any
 > other directories.)  AFAICT all three of these should check the
 > return value, although a error message in the kernel log probably
 > isn't needed.

Factor out the usb_port_runtime_{resume,suspend}() changes into a
standalone patch to allow conflict-free porting on top of stable v3.9+.

[1] https://lore.kernel.org/lkml/Pine.LNX.4.44L0.2002251419120.1485-100000@iolanthe.rowland.org

Fixes: 971fcd492cebf5 ("usb: add runtime pm support for usb port device")
Cc: stable@vger.kernel.org # v3.9+
Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200226175036.14946-3-erosca@de.adit-jv.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/core/port.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/usb/core/port.c
+++ b/drivers/usb/core/port.c
@@ -179,7 +179,10 @@ static int usb_port_runtime_resume(struc
 	if (!port_dev->is_superspeed && peer)
 		pm_runtime_get_sync(&peer->dev);
 
-	usb_autopm_get_interface(intf);
+	retval = usb_autopm_get_interface(intf);
+	if (retval < 0)
+		return retval;
+
 	retval = usb_hub_set_port_power(hdev, hub, port1, true);
 	msleep(hub_power_on_good_delay(hub));
 	if (udev && !retval) {
@@ -232,7 +235,10 @@ static int usb_port_runtime_suspend(stru
 	if (usb_port_block_power_off)
 		return -EBUSY;
 
-	usb_autopm_get_interface(intf);
+	retval = usb_autopm_get_interface(intf);
+	if (retval < 0)
+		return retval;
+
 	retval = usb_hub_set_port_power(hdev, hub, port1, false);
 	usb_clear_port_feature(hdev, port1, USB_PORT_FEAT_C_CONNECTION);
 	if (!port_dev->is_superspeed)

[PATCH 4.9 68/88] vgacon: Fix a UAF in vgacon_invert_region

[Greg Kroah-Hartman]

From: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>

commit 513dc792d6060d5ef572e43852683097a8420f56 upstream.

When syzkaller tests, there is a UAF:
  BUG: KASan: use after free in vgacon_invert_region+0x9d/0x110 at addr
    ffff880000100000
  Read of size 2 by task syz-executor.1/16489
  page:ffffea0000004000 count:0 mapcount:-127 mapping:          (null)
  index:0x0
  page flags: 0xfffff00000000()
  page dumped because: kasan: bad access detected
  CPU: 1 PID: 16489 Comm: syz-executor.1 Not tainted
  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
  rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014
  Call Trace:
    [<ffffffffb119f309>] dump_stack+0x1e/0x20
    [<ffffffffb04af957>] kasan_report+0x577/0x950
    [<ffffffffb04ae652>] __asan_load2+0x62/0x80
    [<ffffffffb090f26d>] vgacon_invert_region+0x9d/0x110
    [<ffffffffb0a39d95>] invert_screen+0xe5/0x470
    [<ffffffffb0a21dcb>] set_selection+0x44b/0x12f0
    [<ffffffffb0a3bfae>] tioclinux+0xee/0x490
    [<ffffffffb0a1d114>] vt_ioctl+0xff4/0x2670
    [<ffffffffb0a0089a>] tty_ioctl+0x46a/0x1a10
    [<ffffffffb052db3d>] do_vfs_ioctl+0x5bd/0xc40
    [<ffffffffb052e2f2>] SyS_ioctl+0x132/0x170
    [<ffffffffb11c9b1b>] system_call_fastpath+0x22/0x27
    Memory state around the buggy address:
     ffff8800000fff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00
     00 00
     ffff8800000fff80: 00 00 00 00 00 00 00 00 00 00 00 00 00
     00 00 00
    >ffff880000100000: ff ff ff ff ff ff ff ff ff ff ff ff ff
     ff ff ff

It can be reproduce in the linux mainline by the program:
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <fcntl.h>
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <sys/ioctl.h>
  #include <linux/vt.h>

  struct tiocl_selection {
    unsigned short xs;      /* X start */
    unsigned short ys;      /* Y start */
    unsigned short xe;      /* X end */
    unsigned short ye;      /* Y end */
    unsigned short sel_mode; /* selection mode */
  };

  #define TIOCL_SETSEL    2
  struct tiocl {
    unsigned char type;
    unsigned char pad;
    struct tiocl_selection sel;
  };

  int main()
  {
    int fd = 0;
    const char *dev = "/dev/char/4:1";

    struct vt_consize v = {0};
    struct tiocl tioc = {0};

    fd = open(dev, O_RDWR, 0);

    v.v_rows = 3346;
    ioctl(fd, VT_RESIZEX, &v);

    tioc.type = TIOCL_SETSEL;
    ioctl(fd, TIOCLINUX, &tioc);

    return 0;
  }

When resize the screen, update the 'vc->vc_size_row' to the new_row_size,
but when 'set_origin' in 'vgacon_set_origin', vgacon use 'vga_vram_base'
for 'vc_origin' and 'vc_visible_origin', not 'vc_screenbuf'. It maybe
smaller than 'vc_screenbuf'. When TIOCLINUX, use the new_row_size to calc
the offset, it maybe larger than the vga_vram_size in vgacon driver, then
bad access.
Also, if set an larger screenbuf firstly, then set an more larger
screenbuf, when copy old_origin to new_origin, a bad access may happen.

So, If the screen size larger than vga_vram, resize screen should be
failed. This alse fix CVE-2020-8649 and CVE-2020-8647.

Linus pointed out that overflow checking seems absent. We're saved by
the existing bounds checks in vc_do_resize() with rather strict
limits:

	if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW)
		return -EINVAL;

Fixes: 0aec4867dca14 ("[PATCH] SVGATextMode fix")
Reference: CVE-2020-8647 and CVE-2020-8649
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
[danvet: augment commit message to point out overflow safety]
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200304022429.37738-1-zhangxiaoxu5@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/video/console/vgacon.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -1323,6 +1323,9 @@ static int vgacon_font_get(struct vc_dat
 static int vgacon_resize(struct vc_data *c, unsigned int width,
 			 unsigned int height, unsigned int user)
 {
+	if ((width << 1) * height > vga_vram_size)
+		return -EINVAL;
+
 	if (width % 2 || width > screen_info.orig_video_cols ||
 	    height > (screen_info.orig_video_lines * vga_default_font_height)/
 	    c->vc_font.height)

[PATCH 4.9 69/88] fat: fix uninit-memory access for partial initialized inode

[Greg Kroah-Hartman]

From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

commit bc87302a093f0eab45cd4e250c2021299f712ec6 upstream.

When get an error in the middle of reading an inode, some fields in the
inode might be still not initialized.  And then the evict_inode path may
access those fields via iput().

To fix, this makes sure that inode fields are initialized.

Reported-by: syzbot+9d82b8de2992579da5d0@syzkaller.appspotmail.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/871rqnreqx.fsf@mail.parknet.co.jp
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/fat/inode.c |   19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -736,6 +736,13 @@ static struct inode *fat_alloc_inode(str
 		return NULL;
 
 	init_rwsem(&ei->truncate_lock);
+	/* Zeroing to allow iput() even if partial initialized inode. */
+	ei->mmu_private = 0;
+	ei->i_start = 0;
+	ei->i_logstart = 0;
+	ei->i_attrs = 0;
+	ei->i_pos = 0;
+
 	return &ei->vfs_inode;
 }
 
@@ -1366,16 +1373,6 @@ out:
 	return 0;
 }
 
-static void fat_dummy_inode_init(struct inode *inode)
-{
-	/* Initialize this dummy inode to work as no-op. */
-	MSDOS_I(inode)->mmu_private = 0;
-	MSDOS_I(inode)->i_start = 0;
-	MSDOS_I(inode)->i_logstart = 0;
-	MSDOS_I(inode)->i_attrs = 0;
-	MSDOS_I(inode)->i_pos = 0;
-}
-
 static int fat_read_root(struct inode *inode)
 {
 	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
@@ -1820,13 +1817,11 @@ int fat_fill_super(struct super_block *s
 	fat_inode = new_inode(sb);
 	if (!fat_inode)
 		goto out_fail;
-	fat_dummy_inode_init(fat_inode);
 	sbi->fat_inode = fat_inode;
 
 	fsinfo_inode = new_inode(sb);
 	if (!fsinfo_inode)
 		goto out_fail;
-	fat_dummy_inode_init(fsinfo_inode);
 	fsinfo_inode->i_ino = MSDOS_FSINFO_INO;
 	sbi->fsinfo_inode = fsinfo_inode;
 	insert_inode_hash(fsinfo_inode);

[PATCH 4.9 70/88] tty:serial:mvebu-uart:fix a wrong return

[Greg Kroah-Hartman]

From: tangbin <tangbin@cmss.chinamobile.com>

commit 4a3e208474204e879d22a310b244cb2f39e5b1f8 upstream.

in this place, the function should return a
negative value and the PTR_ERR already returns
a negative,so return -PTR_ERR() is wrong.

Signed-off-by: tangbin <tangbin@cmss.chinamobile.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20200305013823.20976-1-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/serial/mvebu-uart.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/serial/mvebu-uart.c
+++ b/drivers/tty/serial/mvebu-uart.c
@@ -581,7 +581,7 @@ static int mvebu_uart_probe(struct platf
 
 	port->membase = devm_ioremap_resource(&pdev->dev, reg);
 	if (IS_ERR(port->membase))
-		return -PTR_ERR(port->membase);
+		return PTR_ERR(port->membase);
 
 	data = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_uart_data),
 			    GFP_KERNEL);

[PATCH 4.9 71/88] vt: selection, close sel_buffer race

[Greg Kroah-Hartman]

From: Jiri Slaby <jslaby@suse.cz>

commit 07e6124a1a46b4b5a9b3cacc0c306b50da87abf5 upstream.

syzkaller reported this UAF:
BUG: KASAN: use-after-free in n_tty_receive_buf_common+0x2481/0x2940 drivers/tty/n_tty.c:1741
Read of size 1 at addr ffff8880089e40e9 by task syz-executor.1/13184

CPU: 0 PID: 13184 Comm: syz-executor.1 Not tainted 5.4.7 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
...
 kasan_report+0xe/0x20 mm/kasan/common.c:634
 n_tty_receive_buf_common+0x2481/0x2940 drivers/tty/n_tty.c:1741
 tty_ldisc_receive_buf+0xac/0x190 drivers/tty/tty_buffer.c:461
 paste_selection+0x297/0x400 drivers/tty/vt/selection.c:372
 tioclinux+0x20d/0x4e0 drivers/tty/vt/vt.c:3044
 vt_ioctl+0x1bcf/0x28d0 drivers/tty/vt/vt_ioctl.c:364
 tty_ioctl+0x525/0x15a0 drivers/tty/tty_io.c:2657
 vfs_ioctl fs/ioctl.c:47 [inline]

It is due to a race between parallel paste_selection (TIOCL_PASTESEL)
and set_selection_user (TIOCL_SETSEL) invocations. One uses sel_buffer,
while the other frees it and reallocates a new one for another
selection. Add a mutex to close this race.

The mutex takes care properly of sel_buffer and sel_buffer_lth only. The
other selection global variables (like sel_start, sel_end, and sel_cons)
are protected only in set_selection_user. The other functions need quite
some more work to close the races of the variables there. This is going
to happen later.

This likely fixes (I am unsure as there is no reproducer provided) bug
206361 too. It was marked as CVE-2020-8648.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: syzbot+59997e8d5cbdc486e6f6@syzkaller.appspotmail.com
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200210081131.23572-2-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/vt/selection.c |   23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -13,6 +13,7 @@
 #include <linux/tty.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
+#include <linux/mutex.h>
 #include <linux/slab.h>
 #include <linux/types.h>
 
@@ -40,6 +41,7 @@ static volatile int sel_start = -1; 	/*
 static int sel_end;
 static int sel_buffer_lth;
 static char *sel_buffer;
+static DEFINE_MUTEX(sel_lock);
 
 /* clear_selection, highlight and highlight_pointer can be called
    from interrupt (via scrollback/front) */
@@ -163,7 +165,7 @@ int set_selection(const struct tiocl_sel
 	char *bp, *obp;
 	int i, ps, pe, multiplier;
 	u16 c;
-	int mode;
+	int mode, ret = 0;
 
 	poke_blanked_console();
 
@@ -203,6 +205,7 @@ int set_selection(const struct tiocl_sel
 		pe = tmp;
 	}
 
+	mutex_lock(&sel_lock);
 	if (sel_cons != vc_cons[fg_console].d) {
 		clear_selection();
 		sel_cons = vc_cons[fg_console].d;
@@ -248,9 +251,10 @@ int set_selection(const struct tiocl_sel
 			break;
 		case TIOCL_SELPOINTER:
 			highlight_pointer(pe);
-			return 0;
+			goto unlock;
 		default:
-			return -EINVAL;
+			ret = -EINVAL;
+			goto unlock;
 	}
 
 	/* remove the pointer */
@@ -272,7 +276,7 @@ int set_selection(const struct tiocl_sel
 	else if (new_sel_start == sel_start)
 	{
 		if (new_sel_end == sel_end)	/* no action required */
-			return 0;
+			goto unlock;
 		else if (new_sel_end > sel_end)	/* extend to right */
 			highlight(sel_end + 2, new_sel_end);
 		else				/* contract from right */
@@ -299,7 +303,8 @@ int set_selection(const struct tiocl_sel
 	if (!bp) {
 		printk(KERN_WARNING "selection: kmalloc() failed\n");
 		clear_selection();
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto unlock;
 	}
 	kfree(sel_buffer);
 	sel_buffer = bp;
@@ -324,7 +329,9 @@ int set_selection(const struct tiocl_sel
 		}
 	}
 	sel_buffer_lth = bp - sel_buffer;
-	return 0;
+unlock:
+	mutex_unlock(&sel_lock);
+	return ret;
 }
 
 /* Insert the contents of the selection buffer into the
@@ -353,6 +360,7 @@ int paste_selection(struct tty_struct *t
 	tty_buffer_lock_exclusive(&vc->port);
 
 	add_wait_queue(&vc->paste_wait, &wait);
+	mutex_lock(&sel_lock);
 	while (sel_buffer && sel_buffer_lth > pasted) {
 		set_current_state(TASK_INTERRUPTIBLE);
 		if (signal_pending(current)) {
@@ -360,7 +368,9 @@ int paste_selection(struct tty_struct *t
 			break;
 		}
 		if (tty_throttled(tty)) {
+			mutex_unlock(&sel_lock);
 			schedule();
+			mutex_lock(&sel_lock);
 			continue;
 		}
 		__set_current_state(TASK_RUNNING);
@@ -369,6 +379,7 @@ int paste_selection(struct tty_struct *t
 					      count);
 		pasted += count;
 	}
+	mutex_unlock(&sel_lock);
 	remove_wait_queue(&vc->paste_wait, &wait);
 	__set_current_state(TASK_RUNNING);
 

[PATCH 4.9 72/88] vt: selection, push console lock down

[Greg Kroah-Hartman]

From: Jiri Slaby <jslaby@suse.cz>

commit 4b70dd57a15d2f4685ac6e38056bad93e81e982f upstream.

We need to nest the console lock in sel_lock, so we have to push it down
a bit. Fortunately, the callers of set_selection_* just lock the console
lock around the function call. So moving it down is easy.

In the next patch, we switch the order.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Fixes: 07e6124a1a46 ("vt: selection, close sel_buffer race")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200228115406.5735-1-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/vt/selection.c |   13 ++++++++++++-
 drivers/tty/vt/vt.c        |    2 --
 2 files changed, 12 insertions(+), 3 deletions(-)

--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -158,7 +158,7 @@ static int store_utf8(u16 c, char *p)
  *	The entire selection process is managed under the console_lock. It's
  *	 a lot under the lock but its hardly a performance path
  */
-int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty)
+static int __set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty)
 {
 	struct vc_data *vc = vc_cons[fg_console].d;
 	int sel_mode, new_sel_start, new_sel_end, spc;
@@ -334,6 +334,17 @@ unlock:
 	return ret;
 }
 
+int set_selection(const struct tiocl_selection __user *v, struct tty_struct *tty)
+{
+	int ret;
+
+	console_lock();
+	ret = __set_selection(v, tty);
+	console_unlock();
+
+	return ret;
+}
+
 /* Insert the contents of the selection buffer into the
  * queue of the tty associated with the current console.
  * Invoked by ioctl().
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -2690,9 +2690,7 @@ int tioclinux(struct tty_struct *tty, un
 	switch (type)
 	{
 		case TIOCL_SETSEL:
-			console_lock();
 			ret = set_selection((struct tiocl_selection __user *)(p+1), tty);
-			console_unlock();
 			break;
 		case TIOCL_PASTESEL:
 			ret = paste_selection(tty);

[PATCH 4.9 73/88] vt: selection, push sel_lock up

[Greg Kroah-Hartman]

From: Jiri Slaby <jslaby@suse.cz>

commit e8c75a30a23c6ba63f4ef6895cbf41fd42f21aa2 upstream.

sel_lock cannot nest in the console lock. Thanks to syzkaller, the
kernel states firmly:

> WARNING: possible circular locking dependency detected
> 5.6.0-rc3-syzkaller #0 Not tainted
> ------------------------------------------------------
> syz-executor.4/20336 is trying to acquire lock:
> ffff8880a2e952a0 (&tty->termios_rwsem){++++}, at: tty_unthrottle+0x22/0x100 drivers/tty/tty_ioctl.c:136
>
> but task is already holding lock:
> ffffffff89462e70 (sel_lock){+.+.}, at: paste_selection+0x118/0x470 drivers/tty/vt/selection.c:374
>
> which lock already depends on the new lock.
>
> the existing dependency chain (in reverse order) is:
>
> -> #2 (sel_lock){+.+.}:
>        mutex_lock_nested+0x1b/0x30 kernel/locking/mutex.c:1118
>        set_selection_kernel+0x3b8/0x18a0 drivers/tty/vt/selection.c:217
>        set_selection_user+0x63/0x80 drivers/tty/vt/selection.c:181
>        tioclinux+0x103/0x530 drivers/tty/vt/vt.c:3050
>        vt_ioctl+0x3f1/0x3a30 drivers/tty/vt/vt_ioctl.c:364

This is ioctl(TIOCL_SETSEL).
Locks held on the path: console_lock -> sel_lock

> -> #1 (console_lock){+.+.}:
>        console_lock+0x46/0x70 kernel/printk/printk.c:2289
>        con_flush_chars+0x50/0x650 drivers/tty/vt/vt.c:3223
>        n_tty_write+0xeae/0x1200 drivers/tty/n_tty.c:2350
>        do_tty_write drivers/tty/tty_io.c:962 [inline]
>        tty_write+0x5a1/0x950 drivers/tty/tty_io.c:1046

This is write().
Locks held on the path: termios_rwsem -> console_lock

> -> #0 (&tty->termios_rwsem){++++}:
>        down_write+0x57/0x140 kernel/locking/rwsem.c:1534
>        tty_unthrottle+0x22/0x100 drivers/tty/tty_ioctl.c:136
>        mkiss_receive_buf+0x12aa/0x1340 drivers/net/hamradio/mkiss.c:902
>        tty_ldisc_receive_buf+0x12f/0x170 drivers/tty/tty_buffer.c:465
>        paste_selection+0x346/0x470 drivers/tty/vt/selection.c:389
>        tioclinux+0x121/0x530 drivers/tty/vt/vt.c:3055
>        vt_ioctl+0x3f1/0x3a30 drivers/tty/vt/vt_ioctl.c:364

This is ioctl(TIOCL_PASTESEL).
Locks held on the path: sel_lock -> termios_rwsem

> other info that might help us debug this:
>
> Chain exists of:
>   &tty->termios_rwsem --> console_lock --> sel_lock

Clearly. From the above, we have:
 console_lock -> sel_lock
 sel_lock -> termios_rwsem
 termios_rwsem -> console_lock

Fix this by reversing the console_lock -> sel_lock dependency in
ioctl(TIOCL_SETSEL). First, lock sel_lock, then console_lock.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: syzbot+26183d9746e62da329b8@syzkaller.appspotmail.com
Fixes: 07e6124a1a46 ("vt: selection, close sel_buffer race")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200228115406.5735-2-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/vt/selection.c |   16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -205,7 +205,6 @@ static int __set_selection(const struct
 		pe = tmp;
 	}
 
-	mutex_lock(&sel_lock);
 	if (sel_cons != vc_cons[fg_console].d) {
 		clear_selection();
 		sel_cons = vc_cons[fg_console].d;
@@ -251,10 +250,9 @@ static int __set_selection(const struct
 			break;
 		case TIOCL_SELPOINTER:
 			highlight_pointer(pe);
-			goto unlock;
+			return 0;
 		default:
-			ret = -EINVAL;
-			goto unlock;
+			return -EINVAL;
 	}
 
 	/* remove the pointer */
@@ -276,7 +274,7 @@ static int __set_selection(const struct
 	else if (new_sel_start == sel_start)
 	{
 		if (new_sel_end == sel_end)	/* no action required */
-			goto unlock;
+			return 0;
 		else if (new_sel_end > sel_end)	/* extend to right */
 			highlight(sel_end + 2, new_sel_end);
 		else				/* contract from right */
@@ -303,8 +301,7 @@ static int __set_selection(const struct
 	if (!bp) {
 		printk(KERN_WARNING "selection: kmalloc() failed\n");
 		clear_selection();
-		ret = -ENOMEM;
-		goto unlock;
+		return -ENOMEM;
 	}
 	kfree(sel_buffer);
 	sel_buffer = bp;
@@ -329,8 +326,7 @@ static int __set_selection(const struct
 		}
 	}
 	sel_buffer_lth = bp - sel_buffer;
-unlock:
-	mutex_unlock(&sel_lock);
+
 	return ret;
 }
 
@@ -338,9 +334,11 @@ int set_selection(const struct tiocl_sel
 {
 	int ret;
 
+	mutex_lock(&sel_lock);
 	console_lock();
 	ret = __set_selection(v, tty);
 	console_unlock();
+	mutex_unlock(&sel_lock);
 
 	return ret;
 }

[PATCH 4.9 74/88] x86/pkeys: Manually set X86_FEATURE_OSPKE to preserve existing changes

[Greg Kroah-Hartman]

From: Sean Christopherson <sean.j.christopherson@intel.com>

commit 735a6dd02222d8d070c7bb748f25895239ca8c92 upstream.

Explicitly set X86_FEATURE_OSPKE via set_cpu_cap() instead of calling
get_cpu_cap() to pull the feature bit from CPUID after enabling CR4.PKE.
Invoking get_cpu_cap() effectively wipes out any {set,clear}_cpu_cap()
changes that were made between this_cpu->c_init() and setup_pku(), as
all non-synthetic feature words are reinitialized from the CPU's CPUID
values.

Blasting away capability updates manifests most visibility when running
on a VMX capable CPU, but with VMX disabled by BIOS.  To indicate that
VMX is disabled, init_ia32_feat_ctl() clears X86_FEATURE_VMX, using
clear_cpu_cap() instead of setup_clear_cpu_cap() so that KVM can report
which CPU is misconfigured (KVM needs to probe every CPU anyways).
Restoring X86_FEATURE_VMX from CPUID causes KVM to think VMX is enabled,
ultimately leading to an unexpected #GP when KVM attempts to do VMXON.

Arguably, init_ia32_feat_ctl() should use setup_clear_cpu_cap() and let
KVM figure out a different way to report the misconfigured CPU, but VMX
is not the only feature bit that is affected, i.e. there is precedent
that tweaking feature bits via {set,clear}_cpu_cap() after ->c_init()
is expected to work.  Most notably, x86_init_rdrand()'s clearing of
X86_FEATURE_RDRAND when RDRAND malfunctions is also overwritten.

Fixes: 0697694564c8 ("x86/mm/pkeys: Actually enable Memory Protection Keys in the CPU")
Reported-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Jacob Keller <jacob.e.keller@intel.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20200226231615.13664-1-sean.j.christopherson@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kernel/cpu/common.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -388,7 +388,7 @@ static __always_inline void setup_pku(st
 	 * cpuid bit to be set.  We need to ensure that we
 	 * update that bit in this CPU's "cpu_info".
 	 */
-	get_cpu_cap(c);
+	set_cpu_cap(c, X86_FEATURE_OSPKE);
 }
 
 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS

[PATCH 4.9 75/88] dmaengine: tegra-apb: Fix use-after-free

[Greg Kroah-Hartman]

From: Dmitry Osipenko <digetx@gmail.com>

commit 94788af4ed039476ff3527b0e6a12c1dc42cb022 upstream.

I was doing some experiments with I2C and noticed that Tegra APB DMA
driver crashes sometime after I2C DMA transfer termination. The crash
happens because tegra_dma_terminate_all() bails out immediately if pending
list is empty, and thus, it doesn't release the half-completed descriptors
which are getting re-used before ISR tasklet kicks-in.

 tegra-i2c 7000c400.i2c: DMA transfer timeout
 elants_i2c 0-0010: elants_i2c_irq: failed to read data: -110
 ------------[ cut here ]------------
 WARNING: CPU: 0 PID: 142 at lib/list_debug.c:45 __list_del_entry_valid+0x45/0xac
 list_del corruption, ddbaac44->next is LIST_POISON1 (00000100)
 Modules linked in:
 CPU: 0 PID: 142 Comm: kworker/0:2 Not tainted 5.5.0-rc2-next-20191220-00175-gc3605715758d-dirty #538
 Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
 Workqueue: events_freezable_power_ thermal_zone_device_check
 [<c010e5c5>] (unwind_backtrace) from [<c010a1c5>] (show_stack+0x11/0x14)
 [<c010a1c5>] (show_stack) from [<c0973925>] (dump_stack+0x85/0x94)
 [<c0973925>] (dump_stack) from [<c011f529>] (__warn+0xc1/0xc4)
 [<c011f529>] (__warn) from [<c011f7e9>] (warn_slowpath_fmt+0x61/0x78)
 [<c011f7e9>] (warn_slowpath_fmt) from [<c042497d>] (__list_del_entry_valid+0x45/0xac)
 [<c042497d>] (__list_del_entry_valid) from [<c047a87f>] (tegra_dma_tasklet+0x5b/0x154)
 [<c047a87f>] (tegra_dma_tasklet) from [<c0124799>] (tasklet_action_common.constprop.0+0x41/0x7c)
 [<c0124799>] (tasklet_action_common.constprop.0) from [<c01022ab>] (__do_softirq+0xd3/0x2a8)
 [<c01022ab>] (__do_softirq) from [<c0124683>] (irq_exit+0x7b/0x98)
 [<c0124683>] (irq_exit) from [<c0168c19>] (__handle_domain_irq+0x45/0x80)
 [<c0168c19>] (__handle_domain_irq) from [<c043e429>] (gic_handle_irq+0x45/0x7c)
 [<c043e429>] (gic_handle_irq) from [<c0101aa5>] (__irq_svc+0x65/0x94)
 Exception stack(0xde2ebb90 to 0xde2ebbd8)

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200209163356.6439-2-digetx@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/dma/tegra20-apb-dma.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -755,10 +755,6 @@ static int tegra_dma_terminate_all(struc
 	bool was_busy;
 
 	spin_lock_irqsave(&tdc->lock, flags);
-	if (list_empty(&tdc->pending_sg_req)) {
-		spin_unlock_irqrestore(&tdc->lock, flags);
-		return 0;
-	}
 
 	if (!tdc->busy)
 		goto skip_dma_stop;

[PATCH 4.9 76/88] dmaengine: tegra-apb: Prevent race conditions of tasklet vs free list

[Greg Kroah-Hartman]

From: Dmitry Osipenko <digetx@gmail.com>

commit c33ee1301c393a241d6424e36eff1071811b1064 upstream.

The interrupt handler puts a half-completed DMA descriptor on a free list
and then schedules tasklet to process bottom half of the descriptor that
executes client's callback, this creates possibility to pick up the busy
descriptor from the free list. Thus, let's disallow descriptor's re-use
until it is fully processed.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200209163356.6439-3-digetx@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/dma/tegra20-apb-dma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -288,7 +288,7 @@ static struct tegra_dma_desc *tegra_dma_
 
 	/* Do not allocate if desc are waiting for ack */
 	list_for_each_entry(dma_desc, &tdc->free_dma_desc, node) {
-		if (async_tx_test_ack(&dma_desc->txd)) {
+		if (async_tx_test_ack(&dma_desc->txd) && !dma_desc->cb_count) {
 			list_del(&dma_desc->node);
 			spin_unlock_irqrestore(&tdc->lock, flags);
 			dma_desc->txd.flags = 0;

[PATCH 4.9 77/88] ARM: dts: ls1021a: Restore MDIO compatible to gianfar

[Greg Kroah-Hartman]

From: Vladimir Oltean <olteanv@gmail.com>

commit 7155c44624d061692b4c13aa8343f119c67d4fc0 upstream.

The difference between "fsl,etsec2-mdio" and "gianfar" has to do with
the .get_tbipa function, which calculates the address of the TBIPA
register automatically, if not explicitly specified. [ see
drivers/net/ethernet/freescale/fsl_pq_mdio.c ]. On LS1021A, the TBIPA
register is at offset 0x30 within the port register block, which is what
the "gianfar" method of calculating addresses actually does.

Luckily, the bad "compatible" is inconsequential for ls1021a.dtsi,
because the TBIPA register is explicitly specified via the second "reg"
(<0x0 0x2d10030 0x0 0x4>), so the "get_tbipa" function is dead code.
Nonetheless it's good to restore it to its correct value.

Background discussion:
https://www.spinics.net/lists/stable/msg361156.html

Fixes: c7861adbe37f ("ARM: dts: ls1021: Fix SGMII PCS link remaining down after PHY disconnect")
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/boot/dts/ls1021a.dtsi |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/arm/boot/dts/ls1021a.dtsi
+++ b/arch/arm/boot/dts/ls1021a.dtsi
@@ -505,7 +505,7 @@
 		};
 
 		mdio0: mdio@2d24000 {
-			compatible = "fsl,etsec2-mdio";
+			compatible = "gianfar";
 			device_type = "mdio";
 			#address-cells = <1>;
 			#size-cells = <0>;
@@ -513,7 +513,7 @@
 		};
 
 		mdio1: mdio@2d64000 {
-			compatible = "fsl,etsec2-mdio";
+			compatible = "gianfar";
 			device_type = "mdio";
 			#address-cells = <1>;
 			#size-cells = <0>;

[PATCH 4.9 78/88] ASoC: pcm: Fix possible buffer overflow in dpcm state sysfs output

[Greg Kroah-Hartman]

From: Takashi Iwai <tiwai@suse.de>

commit 6c89ffea60aa3b2a33ae7987de1e84bfb89e4c9e upstream.

dpcm_show_state() invokes multiple snprintf() calls to concatenate
formatted strings on the fixed size buffer.  The usage of snprintf()
is supposed for avoiding the buffer overflow, but it doesn't work as
expected because snprintf() doesn't return the actual output size but
the size to be written.

Fix this bug by replacing all snprintf() calls with scnprintf()
calls.

Fixes: f86dcef87b77 ("ASoC: dpcm: Add debugFS support for DPCM")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20200218111737.14193-4-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/soc/soc-pcm.c |   16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2979,16 +2979,16 @@ static ssize_t dpcm_show_state(struct sn
 	ssize_t offset = 0;
 
 	/* FE state */
-	offset += snprintf(buf + offset, size - offset,
+	offset += scnprintf(buf + offset, size - offset,
 			"[%s - %s]\n", fe->dai_link->name,
 			stream ? "Capture" : "Playback");
 
-	offset += snprintf(buf + offset, size - offset, "State: %s\n",
+	offset += scnprintf(buf + offset, size - offset, "State: %s\n",
 	                dpcm_state_string(fe->dpcm[stream].state));
 
 	if ((fe->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
 	    (fe->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
-		offset += snprintf(buf + offset, size - offset,
+		offset += scnprintf(buf + offset, size - offset,
 				"Hardware Params: "
 				"Format = %s, Channels = %d, Rate = %d\n",
 				snd_pcm_format_name(params_format(params)),
@@ -2996,10 +2996,10 @@ static ssize_t dpcm_show_state(struct sn
 				params_rate(params));
 
 	/* BEs state */
-	offset += snprintf(buf + offset, size - offset, "Backends:\n");
+	offset += scnprintf(buf + offset, size - offset, "Backends:\n");
 
 	if (list_empty(&fe->dpcm[stream].be_clients)) {
-		offset += snprintf(buf + offset, size - offset,
+		offset += scnprintf(buf + offset, size - offset,
 				" No active DSP links\n");
 		goto out;
 	}
@@ -3008,16 +3008,16 @@ static ssize_t dpcm_show_state(struct sn
 		struct snd_soc_pcm_runtime *be = dpcm->be;
 		params = &dpcm->hw_params;
 
-		offset += snprintf(buf + offset, size - offset,
+		offset += scnprintf(buf + offset, size - offset,
 				"- %s\n", be->dai_link->name);
 
-		offset += snprintf(buf + offset, size - offset,
+		offset += scnprintf(buf + offset, size - offset,
 				"   State: %s\n",
 				dpcm_state_string(be->dpcm[stream].state));
 
 		if ((be->dpcm[stream].state >= SND_SOC_DPCM_STATE_HW_PARAMS) &&
 		    (be->dpcm[stream].state <= SND_SOC_DPCM_STATE_STOP))
-			offset += snprintf(buf + offset, size - offset,
+			offset += scnprintf(buf + offset, size - offset,
 				"   Hardware Params: "
 				"Format = %s, Channels = %d, Rate = %d\n",
 				snd_pcm_format_name(params_format(params)),

[PATCH 4.9 79/88] ASoC: pcm512x: Fix unbalanced regulator enable call in probe error path

[Greg Kroah-Hartman]

From: Matthias Reichl <hias@horus.com>

commit ac0a68997935c4acb92eaae5ad8982e0bb432d56 upstream.

When we get a clock error during probe we have to call
regulator_bulk_disable before bailing out, otherwise we trigger
a warning in regulator_put.

Fix this by using "goto err" like in the error cases above.

Fixes: 5a3af1293194d ("ASoC: pcm512x: Add PCM512x driver")
Signed-off-by: Matthias Reichl <hias@horus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200220202956.29233-1-hias@horus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/soc/codecs/pcm512x.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/sound/soc/codecs/pcm512x.c
+++ b/sound/soc/codecs/pcm512x.c
@@ -1441,13 +1441,15 @@ int pcm512x_probe(struct device *dev, st
 	}
 
 	pcm512x->sclk = devm_clk_get(dev, NULL);
-	if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER)
-		return -EPROBE_DEFER;
+	if (PTR_ERR(pcm512x->sclk) == -EPROBE_DEFER) {
+		ret = -EPROBE_DEFER;
+		goto err;
+	}
 	if (!IS_ERR(pcm512x->sclk)) {
 		ret = clk_prepare_enable(pcm512x->sclk);
 		if (ret != 0) {
 			dev_err(dev, "Failed to enable SCLK: %d\n", ret);
-			return ret;
+			goto err;
 		}
 	}
 

[PATCH 4.9 80/88] ASoC: dapm: Correct DAPM handling of active widgets during shutdown

[Greg Kroah-Hartman]

From: Charles Keepax <ckeepax@opensource.cirrus.com>

commit 9b3193089e77d3b59b045146ff1c770dd899acb1 upstream.

commit c2caa4da46a4 ("ASoC: Fix widget powerdown on shutdown") added a
set of the power state during snd_soc_dapm_shutdown to ensure the
widgets powered off. However, when commit 39eb5fd13dff
("ASoC: dapm: Delay w->power update until the changes are written")
added the new_power member of the widget structure, to differentiate
between the current power state and the target power state, it did not
update the shutdown to use the new_power member.

As new_power has not updated it will be left in the state set by the
last DAPM sequence, ie. 1 for active widgets. So as the DAPM sequence
for the shutdown proceeds it will turn the widgets on (despite them
already being on) rather than turning them off.

Fixes: 39eb5fd13dff ("ASoC: dapm: Delay w->power update until the changes are written")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200228153145.21013-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -4363,7 +4363,7 @@ static void soc_dapm_shutdown_dapm(struc
 			continue;
 		if (w->power) {
 			dapm_seq_insert(w, &down_list, false);
-			w->power = 0;
+			w->new_power = 0;
 			powerdown = 1;
 		}
 	}

[PATCH 4.9 81/88] RDMA/iwcm: Fix iwcm work deallocation

[Greg Kroah-Hartman]

From: Bernard Metzler <bmt@zurich.ibm.com>

commit 810dbc69087b08fd53e1cdd6c709f385bc2921ad upstream.

The dealloc_work_entries() function must update the work_free_list pointer
while freeing its entries, since potentially called again on same list. A
second iteration of the work list caused system crash. This happens, if
work allocation fails during cma_iw_listen() and free_cm_id() tries to
free the list again during cleanup.

Fixes: 922a8e9fb2e0 ("RDMA: iWARP Connection Manager.")
Link: https://lore.kernel.org/r/20200302181614.17042-1-bmt@zurich.ibm.com
Reported-by: syzbot+cb0c054eabfba4342146@syzkaller.appspotmail.com
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/core/iwcm.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/infiniband/core/iwcm.c
+++ b/drivers/infiniband/core/iwcm.c
@@ -137,8 +137,10 @@ static void dealloc_work_entries(struct
 {
 	struct list_head *e, *tmp;
 
-	list_for_each_safe(e, tmp, &cm_id_priv->work_free_list)
+	list_for_each_safe(e, tmp, &cm_id_priv->work_free_list) {
+		list_del(e);
 		kfree(list_entry(e, struct iwcm_work, free_list));
+	}
 }
 
 static int alloc_work_entries(struct iwcm_id_private *cm_id_priv, int count)

[PATCH 4.9 82/88] RMDA/cm: Fix missing ib_cm_destroy_id() in ib_cm_insert_listen()

[Greg Kroah-Hartman]

From: Jason Gunthorpe <jgg@mellanox.com>

commit c14dfddbd869bf0c2bafb7ef260c41d9cebbcfec upstream.

The algorithm pre-allocates a cm_id since allocation cannot be done while
holding the cm.lock spinlock, however it doesn't free it on one error
path, leading to a memory leak.

Fixes: 067b171b8679 ("IB/cm: Share listening CM IDs")
Link: https://lore.kernel.org/r/20200221152023.GA8680@ziepe.ca
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/core/cm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -1073,6 +1073,7 @@ struct ib_cm_id *ib_cm_insert_listen(str
 			/* Sharing an ib_cm_id with different handlers is not
 			 * supported */
 			spin_unlock_irqrestore(&cm.lock, flags);
+			ib_destroy_cm_id(cm_id);
 			return ERR_PTR(-EINVAL);
 		}
 		atomic_inc(&cm_id_priv->refcount);

[PATCH 4.9 83/88] ARM: imx: build v7_cpu_resume() unconditionally

[Greg Kroah-Hartman]

From: Ahmad Fatoum <a.fatoum@pengutronix.de>

commit 512a928affd51c2dc631401e56ad5ee5d5dd68b6 upstream.

This function is not only needed by the platform suspend code, but is also
reused as the CPU resume function when the ARM cores can be powered down
completely in deep idle, which is the case on i.MX6SX and i.MX6UL(L).

Providing the static inline stub whenever CONFIG_SUSPEND is disabled means
that those platforms will hang on resume from cpuidle if suspend is disabled.

So there are two problems:

  - The static inline stub masks the linker error
  - The function is not available where needed

Fix both by just building the function unconditionally, when
CONFIG_SOC_IMX6 is enabled. The actual code is three instructions long,
so it's arguably ok to just leave it in for all i.MX6 kernel configurations.

Fixes: 05136f0897b5 ("ARM: imx: support arm power off in cpuidle for i.mx6sx")
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/mach-imx/Makefile       |    2 ++
 arch/arm/mach-imx/common.h       |    4 ++--
 arch/arm/mach-imx/resume-imx6.S  |   24 ++++++++++++++++++++++++
 arch/arm/mach-imx/suspend-imx6.S |   14 --------------
 4 files changed, 28 insertions(+), 16 deletions(-)

--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -86,6 +86,8 @@ AFLAGS_suspend-imx6.o :=-Wa,-march=armv7
 obj-$(CONFIG_SOC_IMX6) += suspend-imx6.o
 obj-$(CONFIG_SOC_IMX53) += suspend-imx53.o
 endif
+AFLAGS_resume-imx6.o :=-Wa,-march=armv7-a
+obj-$(CONFIG_SOC_IMX6) += resume-imx6.o
 obj-$(CONFIG_SOC_IMX6) += pm-imx6.o
 
 obj-$(CONFIG_SOC_IMX1) += mach-imx1.o
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -112,17 +112,17 @@ void imx_cpu_die(unsigned int cpu);
 int imx_cpu_kill(unsigned int cpu);
 
 #ifdef CONFIG_SUSPEND
-void v7_cpu_resume(void);
 void imx53_suspend(void __iomem *ocram_vbase);
 extern const u32 imx53_suspend_sz;
 void imx6_suspend(void __iomem *ocram_vbase);
 #else
-static inline void v7_cpu_resume(void) {}
 static inline void imx53_suspend(void __iomem *ocram_vbase) {}
 static const u32 imx53_suspend_sz;
 static inline void imx6_suspend(void __iomem *ocram_vbase) {}
 #endif
 
+void v7_cpu_resume(void);
+
 void imx6_pm_ccm_init(const char *ccm_compat);
 void imx6q_pm_init(void);
 void imx6dl_pm_init(void);
--- /dev/null
+++ b/arch/arm/mach-imx/resume-imx6.S
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/asm-offsets.h>
+#include <asm/hardware/cache-l2x0.h>
+#include "hardware.h"
+
+/*
+ * The following code must assume it is running from physical address
+ * where absolute virtual addresses to the data section have to be
+ * turned into relative ones.
+ */
+
+ENTRY(v7_cpu_resume)
+	bl	v7_invalidate_l1
+#ifdef CONFIG_CACHE_L2X0
+	bl	l2c310_early_resume
+#endif
+	b	cpu_resume
+ENDPROC(v7_cpu_resume)
--- a/arch/arm/mach-imx/suspend-imx6.S
+++ b/arch/arm/mach-imx/suspend-imx6.S
@@ -333,17 +333,3 @@ resume:
 
 	ret	lr
 ENDPROC(imx6_suspend)
-
-/*
- * The following code must assume it is running from physical address
- * where absolute virtual addresses to the data section have to be
- * turned into relative ones.
- */
-
-ENTRY(v7_cpu_resume)
-	bl	v7_invalidate_l1
-#ifdef CONFIG_CACHE_L2X0
-	bl	l2c310_early_resume
-#endif
-	b	cpu_resume
-ENDPROC(v7_cpu_resume)

[PATCH 4.9 84/88] hwmon: (adt7462) Fix an error return in ADT7462_REG_VOLT()

[Greg Kroah-Hartman]

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 44f2f882909fedfc3a56e4b90026910456019743 upstream.

This is only called from adt7462_update_device().  The caller expects it
to return zero on error.  I fixed a similar issue earlier in commit
a4bf06d58f21 ("hwmon: (adt7462) ADT7462_REG_VOLT_MAX() should return 0")
but I missed this one.

Fixes: c0b4e3ab0c76 ("adt7462: new hwmon driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Link: https://lore.kernel.org/r/20200303101608.kqjwfcazu2ylhi2a@kili.mountain
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/hwmon/adt7462.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwmon/adt7462.c
+++ b/drivers/hwmon/adt7462.c
@@ -426,7 +426,7 @@ static int ADT7462_REG_VOLT(struct adt74
 			return 0x95;
 		break;
 	}
-	return -ENODEV;
+	return 0;
 }
 
 /* Provide labels for sysfs */

[PATCH 4.9 85/88] dmaengine: coh901318: Fix a double lock bug in dma_tc_handle()

[Greg Kroah-Hartman]

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 36d5d22090d13fd3a7a8c9663a711cbe6970aac8 upstream.

The caller is already holding the lock so this will deadlock.

Fixes: 0b58828c923e ("DMAENGINE: COH 901 318 remove irq counting")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200217144050.3i4ymbytogod4ijn@kili.mountain
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/dma/coh901318.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -1944,8 +1944,6 @@ static void dma_tc_handle(struct coh9013
 		return;
 	}
 
-	spin_lock(&cohc->lock);
-
 	/*
 	 * When we reach this point, at least one queue item
 	 * should have been moved over from cohc->queue to
@@ -1966,8 +1964,6 @@ static void dma_tc_handle(struct coh9013
 	if (coh901318_queue_start(cohc) == NULL)
 		cohc->busy = 0;
 
-	spin_unlock(&cohc->lock);
-
 	/*
 	 * This tasklet will remove items from cohc->active
 	 * and thus terminates them.

[PATCH 4.9 86/88] powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems

[Greg Kroah-Hartman]

From: Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>

commit fc37a1632d40c80c067eb1bc235139f5867a2667 upstream.

PowerVM systems running compatibility mode on a few Power8 revisions are
still vulnerable to the hardware defect that loses PMU exceptions arriving
prior to a context switch.

The software fix for this issue is enabled through the CPU_FTR_PMAO_BUG
cpu_feature bit, nevertheless this bit also needs to be set for PowerVM
compatibility mode systems.

Fixes: 68f2f0d431d9ea4 ("powerpc: Add a cpu feature CPU_FTR_PMAO_BUG")
Signed-off-by: Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>
Reviewed-by: Leonardo Bras <leonardo@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200227134715.9715-1-desnesn@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/kernel/cputable.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -2199,11 +2199,13 @@ static struct cpu_spec * __init setup_cp
 		 * oprofile_cpu_type already has a value, then we are
 		 * possibly overriding a real PVR with a logical one,
 		 * and, in that case, keep the current value for
-		 * oprofile_cpu_type.
+		 * oprofile_cpu_type. Futhermore, let's ensure that the
+		 * fix for the PMAO bug is enabled on compatibility mode.
 		 */
 		if (old.oprofile_cpu_type != NULL) {
 			t->oprofile_cpu_type = old.oprofile_cpu_type;
 			t->oprofile_type = old.oprofile_type;
+			t->cpu_features |= old.cpu_features & CPU_FTR_PMAO_BUG;
 		}
 	}
 

[PATCH 4.9 87/88] dm cache: fix a crash due to incorrect work item cancelling

[Greg Kroah-Hartman]

From: Mikulas Patocka <mpatocka@redhat.com>

commit 7cdf6a0aae1cccf5167f3f04ecddcf648b78e289 upstream.

The crash can be reproduced by running the lvm2 testsuite test
lvconvert-thin-external-cache.sh for several minutes, e.g.:
  while :; do make check T=shell/lvconvert-thin-external-cache.sh; done

The crash happens in this call chain:
do_waker -> policy_tick -> smq_tick -> end_hotspot_period -> clear_bitset
-> memset -> __memset -- which accesses an invalid pointer in the vmalloc
area.

The work entry on the workqueue is executed even after the bitmap was
freed. The problem is that cancel_delayed_work doesn't wait for the
running work item to finish, so the work item can continue running and
re-submitting itself even after cache_postsuspend. In order to make sure
that the work item won't be running, we must use cancel_delayed_work_sync.

Also, change flush_workqueue to drain_workqueue, so that if some work item
submits itself or another work item, we are properly waiting for both of
them.

Fixes: c6b4fcbad044 ("dm: add cache target")
Cc: stable@vger.kernel.org # v3.9
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-cache-target.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -2192,8 +2192,8 @@ static void wait_for_migrations(struct c
 
 static void stop_worker(struct cache *cache)
 {
-	cancel_delayed_work(&cache->waker);
-	flush_workqueue(cache->wq);
+	cancel_delayed_work_sync(&cache->waker);
+	drain_workqueue(cache->wq);
 }
 
 static void requeue_deferred_cells(struct cache *cache)

[PATCH 4.9 88/88] crypto: algif_skcipher - use ZERO_OR_NULL_PTR in skcipher_recvmsg_async

[Greg Kroah-Hartman]

From: yangerkun <yangerkun@huawei.com>

Nowdays, we trigger a oops:
...
kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] SMP KASAN
...
Call Trace:
 [<ffffffff81a26fb1>] skcipher_recvmsg_async+0x3f1/0x1400 x86/../crypto/algif_skcipher.c:543
 [<ffffffff81a28053>] skcipher_recvmsg+0x93/0x7f0 x86/../crypto/algif_skcipher.c:723
 [<ffffffff823e43a4>] sock_recvmsg_nosec x86/../net/socket.c:702 [inline]
 [<ffffffff823e43a4>] sock_recvmsg x86/../net/socket.c:710 [inline]
 [<ffffffff823e43a4>] sock_recvmsg+0x94/0xc0 x86/../net/socket.c:705
 [<ffffffff823e464b>] sock_read_iter+0x27b/0x3a0 x86/../net/socket.c:787
 [<ffffffff817f479b>] aio_run_iocb+0x21b/0x7a0 x86/../fs/aio.c:1520
 [<ffffffff817f57c9>] io_submit_one x86/../fs/aio.c:1630 [inline]
 [<ffffffff817f57c9>] do_io_submit+0x6b9/0x10b0 x86/../fs/aio.c:1688
 [<ffffffff817f902d>] SYSC_io_submit x86/../fs/aio.c:1713 [inline]
 [<ffffffff817f902d>] SyS_io_submit+0x2d/0x40 x86/../fs/aio.c:1710
 [<ffffffff828b33c3>] tracesys_phase2+0x90/0x95

In skcipher_recvmsg_async, we use '!sreq->tsg' to determine does we
calloc fail. However, kcalloc may return ZERO_SIZE_PTR, and with this,
the latter sg_init_table will trigger the bug. Fix it be use ZERO_OF_NULL_PTR.

This function was introduced with ' commit a596999b7ddf ("crypto:
algif - change algif_skcipher to be asynchronous")', and has been removed
with 'commit e870456d8e7c ("crypto: algif_skcipher - overhaul memory
management")'.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 crypto/algif_skcipher.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

v1->v2:
update the commit message

--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -538,7 +538,7 @@ static int skcipher_recvmsg_async(struct
 	lock_sock(sk);
 	tx_nents = skcipher_all_sg_nents(ctx);
 	sreq->tsg = kcalloc(tx_nents, sizeof(*sg), GFP_KERNEL);
-	if (unlikely(!sreq->tsg))
+	if (unlikely(ZERO_OR_NULL_PTR(sreq->tsg)))
 		goto unlock;
 	sg_init_table(sreq->tsg, tx_nents);
 	memcpy(iv, ctx->iv, ivsize);

Re: [PATCH 4.9 62/88] x86/boot/compressed: Dont declare __force_order in kaslr_64.c

[Thomas Voegtle]

On Tue, 10 Mar 2020, Greg Kroah-Hartman wrote:

> From: H.J. Lu <hjl.tools@gmail.com>
>
> [ Upstream commit df6d4f9db79c1a5d6f48b59db35ccd1e9ff9adfc ]
>
> GCC 10 changed the default to -fno-common, which leads to
>
>    LD      arch/x86/boot/compressed/vmlinux
>  ld: arch/x86/boot/compressed/pgtable_64.o:(.bss+0x0): multiple definition of `__force_order'; \
>    arch/x86/boot/compressed/kaslr_64.o:(.bss+0x0): first defined here
>  make[2]: *** [arch/x86/boot/compressed/Makefile:119: arch/x86/boot/compressed/vmlinux] Error 1
>
> Since __force_order is already provided in pgtable_64.c, there is no
> need to declare __force_order in kaslr_64.c.
>
> Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
> Signed-off-by: Borislav Petkov <bp@suse.de>
> Link: https://lkml.kernel.org/r/20200124181811.4780-1-hjl.tools@gmail.com
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
> arch/x86/boot/compressed/pagetable.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/arch/x86/boot/compressed/pagetable.c b/arch/x86/boot/compressed/pagetable.c
> index 56589d0a804b1..2591f8f6d45f2 100644
> --- a/arch/x86/boot/compressed/pagetable.c
> +++ b/arch/x86/boot/compressed/pagetable.c
> @@ -25,9 +25,6 @@
> #define __PAGE_OFFSET __PAGE_OFFSET_BASE
> #include "../../mm/ident_map.c"
>
> -/* Used by pgtable.h asm code to force instruction serialization. */
> -unsigned long __force_order;
> -
> /* Used to track our page table allocation area. */
> struct alloc_pgt_data {
> 	unsigned char *pgt_buf;
>


This ends up for me in:

arch/x86/boot/compressed/pagetable.o: In function 
`initialize_identity_maps':
pagetable.c:(.text+0x309): undefined reference to `__force_order'
arch/x86/boot/compressed/pagetable.o: In function 
`finalize_identity_maps':
pagetable.c:(.text+0x41a): undefined reference to `__force_order'


pgtable_64.c doesn't exist in v4.9 for x86.

So I guess it's not correct to remove __force_order from pagetable.c?


    Thomas

Re: [PATCH 4.9 62/88] x86/boot/compressed: Dont declare __force_order in kaslr_64.c

[Borislav Petkov]

On Tue, Mar 10, 2020 at 03:33:57PM +0100, Thomas Voegtle wrote:
> This ends up for me in:
> 
> arch/x86/boot/compressed/pagetable.o: In function
> `initialize_identity_maps':
> pagetable.c:(.text+0x309): undefined reference to `__force_order'
> arch/x86/boot/compressed/pagetable.o: In function `finalize_identity_maps':
> pagetable.c:(.text+0x41a): undefined reference to `__force_order'
> 
> 
> pgtable_64.c doesn't exist in v4.9 for x86.
> 
> So I guess it's not correct to remove __force_order from pagetable.c?

Yes, the second __force_order thing was added by

08529078d8d9 ("x86/boot/compressed/64: Detect and handle 5-level paging at boot-time")

which is 4.14.

Greg, pls drop this patch from the 4.9 lineup.

Thx.

-- 
Regards/Gruss,
    Boris.

SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg

Re: [PATCH 4.9 62/88] x86/boot/compressed: Dont declare __force_order in kaslr_64.c

[Greg Kroah-Hartman]

On Tue, Mar 10, 2020 at 04:08:45PM +0100, Borislav Petkov wrote:
> On Tue, Mar 10, 2020 at 03:33:57PM +0100, Thomas Voegtle wrote:
> > This ends up for me in:
> > 
> > arch/x86/boot/compressed/pagetable.o: In function
> > `initialize_identity_maps':
> > pagetable.c:(.text+0x309): undefined reference to `__force_order'
> > arch/x86/boot/compressed/pagetable.o: In function `finalize_identity_maps':
> > pagetable.c:(.text+0x41a): undefined reference to `__force_order'
> > 
> > 
> > pgtable_64.c doesn't exist in v4.9 for x86.
> > 
> > So I guess it's not correct to remove __force_order from pagetable.c?
> 
> Yes, the second __force_order thing was added by
> 
> 08529078d8d9 ("x86/boot/compressed/64: Detect and handle 5-level paging at boot-time")
> 
> which is 4.14.
> 
> Greg, pls drop this patch from the 4.9 lineup.

Now dropped, thanks.

greg k-h

Re: [PATCH 4.9 00/88] 4.9.216-stable review

[Naresh Kamboju]

On Tue, 10 Mar 2020 at 18:15, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 4.9.216 release.
> There are 88 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 Thu, 12 Mar 2020 12:34:10 +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-4.9.216-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-4.9.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

Results from Linaro’s test farm.
No regressions on arm64, arm, x86_64, and i386.

Summary
------------------------------------------------------------------------

kernel: 4.9.216-rc1
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git branch: linux-4.9.y
git commit: 823586b24f3634fefd5b5e83293920023c6f008c
git describe: v4.9.215-89-g823586b24f36
Test details: https://qa-reports.linaro.org/lkft/linux-stable-rc-4.9-oe/build/v4.9.215-89-g823586b24f36

No regressions (compared to build v4.9.215)

No fixes (compared to build v4.9.215)

Ran 19814 total tests in the following environments and test suites.

Environments
--------------
- dragonboard-410c - arm64
- hi6220-hikey - arm64
- i386
- juno-r2 - arm64
- qemu_arm
- qemu_arm64
- qemu_i386
- qemu_x86_64
- x15 - arm
- x86_64

Test Suites
-----------
* build
* install-android-platform-tools-r2600
* install-android-platform-tools-r2800
* kselftest
* kvm-unit-tests
* libhugetlbfs
* linux-log-parser
* ltp-cap_bounds-tests
* ltp-commands-tests
* ltp-containers-tests
* ltp-cpuhotplug-tests
* ltp-crypto-tests
* ltp-cve-tests
* ltp-dio-tests
* ltp-fcntl-locktests-tests
* ltp-filecaps-tests
* ltp-fs-tests
* ltp-fs_bind-tests
* ltp-fs_perms_simple-tests
* ltp-fsx-tests
* ltp-hugetlb-tests
* ltp-io-tests
* ltp-ipc-tests
* ltp-math-tests
* ltp-mm-tests
* ltp-nptl-tests
* ltp-pty-tests
* ltp-sched-tests
* ltp-securebits-tests
* ltp-syscalls-tests
* perf
* spectre-meltdown-checker-test
* v4l2-compliance
* network-basic-tests
* ltp-cap_bounds-kasan-tests
* ltp-commands-kasan-tests
* ltp-containers-kasan-tests
* ltp-cpuhotplug-kasan-tests
* ltp-crypto-kasan-tests
* ltp-dio-kasan-tests
* ltp-fcntl-locktests-kasan-tests
* ltp-filecaps-kasan-tests
* ltp-fs-kasan-tests
* ltp-fs_bind-kasan-tests
* ltp-fs_perms_simple-kasan-tests
* ltp-fsx-kasan-tests
* ltp-hugetlb-kasan-tests
* ltp-io-kasan-tests
* ltp-ipc-kasan-tests
* ltp-math-kasan-tests
* ltp-mm-kasan-tests
* ltp-nptl-kasan-tests
* ltp-pty-kasan-tests
* ltp-securebits-kasan-tests
* ltp-syscalls-kasan-tests
* ltp-open-posix-tests
* ltp-cve-kasan-tests
* ltp-sched-kasan-tests

-- 
Linaro LKFT
https://lkft.linaro.org

Re: [PATCH 4.9 00/88] 4.9.216-stable review

[Jon Hunter]

On 10/03/2020 12:38, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.9.216 release.
> There are 88 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 Thu, 12 Mar 2020 12:34:10 +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-4.9.216-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-4.9.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests are passing for Tegra ...

Test results for stable-v4.9:
    8 builds:	8 pass, 0 fail
    16 boots:	16 pass, 0 fail
    24 tests:	24 pass, 0 fail

Linux version:	4.9.216-rc1-g823586b24f36
Boards tested:	tegra124-jetson-tk1, tegra20-ventana,
                tegra210-p2371-2180, tegra30-cardhu-a04

Cheers
Jon

-- 
nvpublic

Re: [PATCH 4.9 00/88] 4.9.216-stable review

[Jon Hunter]

On 10/03/2020 12:38, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.9.216 release.
> There are 88 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 Thu, 12 Mar 2020 12:34:10 +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-4.9.216-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-4.9.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests are passing for Tegra ...

Test results for stable-v4.9:
    8 builds:	8 pass, 0 fail
    16 boots:	16 pass, 0 fail
    24 tests:	24 pass, 0 fail

Linux version:	4.9.216-rc1-g823586b24f36
Boards tested:	tegra124-jetson-tk1, tegra20-ventana,
                tegra210-p2371-2180, tegra30-cardhu-a04

Cheers
Jon

-- 
nvpublic

Re: [PATCH 4.9 00/88] 4.9.216-stable review

[shuah]

On 3/10/20 6:38 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.9.216 release.
> There are 88 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 Thu, 12 Mar 2020 12:34:10 +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-4.9.216-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-4.9.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

Compiled and booted on my test system. No dmesg regressions.

thanks,
-- Shuah

Re: [PATCH 4.9 00/88] 4.9.216-stable review

[Guenter Roeck]

On 3/10/20 5:38 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.9.216 release.
> There are 88 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 Thu, 12 Mar 2020 12:34:10 +0000.
> Anything received after that time might be too late.
> 

Build results:
	total: 172 pass: 172 fail: 0
Qemu test results:
	total: 381 pass: 381 fail: 0

Guenter