[PATCH 4.19 00/74] 4.19.221-rc1 review

[PATCH 4.19 00/74] 4.19.221-rc1 review

[Greg Kroah-Hartman]

This is the start of the stable review cycle for the 4.19.221 release.
There are 74 patches in this series, all will be posted as a response
to this one.  If anyone has any issues with these being applied, please
let me know.

Responses should be made by Wed, 15 Dec 2021 09:29:16 +0000.
Anything received after that time might be too late.

The whole patch series can be found in one patch at:
	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.221-rc1.gz
or in the git tree and branch at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
and the diffstat can be found below.

thanks,

greg k-h

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

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Linux 4.19.221-rc1

Wei Yongjun <weiyongjun1@huawei.com>
    net: sched: make function qdisc_free_cb() static

Cong Wang <xiyou.wangcong@gmail.com>
    net_sched: fix a crash in tc_new_tfilter()

Vladimir Murzin <vladimir.murzin@arm.com>
    irqchip: nvic: Fix offset for Interrupt Priority Offsets

Wudi Wang <wangwudi@hisilicon.com>
    irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL

Pali Rohár <pali@kernel.org>
    irqchip/armada-370-xp: Fix support for Multi-MSI interrupts

Pali Rohár <pali@kernel.org>
    irqchip/armada-370-xp: Fix return value of armada_370_xp_msi_alloc()

Yang Yingliang <yangyingliang@huawei.com>
    iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove

Evgeny Boger <boger@wirenboard.com>
    iio: adc: axp20x_adc: fix charging current reporting on AXP22x

Gwendal Grignou <gwendal@chromium.org>
    iio: at91-sama5d2: Fix incorrect sign extension

Lars-Peter Clausen <lars@metafoo.de>
    iio: dln2: Check return value of devm_iio_trigger_register()

Noralf Trønnes <noralf@tronnes.org>
    iio: dln2-adc: Fix lockdep complaint

Lars-Peter Clausen <lars@metafoo.de>
    iio: itg3200: Call iio_trigger_notify_done() on error

Lars-Peter Clausen <lars@metafoo.de>
    iio: kxsd9: Don't return error code in trigger handler

Lars-Peter Clausen <lars@metafoo.de>
    iio: ltr501: Don't return error code in trigger handler

Lars-Peter Clausen <lars@metafoo.de>
    iio: mma8452: Fix trigger reference couting

Lars-Peter Clausen <lars@metafoo.de>
    iio: stk3310: Don't return error code in interrupt handler

Alyssa Ross <hi@alyssa.is>
    iio: trigger: stm32-timer: fix MODULE_ALIAS

Lars-Peter Clausen <lars@metafoo.de>
    iio: trigger: Fix reference counting

Mathias Nyman <mathias.nyman@linux.intel.com>
    xhci: avoid race between disable slot command and host runtime suspend

Pavel Hofman <pavel.hofman@ivitera.com>
    usb: core: config: using bit mask instead of individual bits

Kai-Heng Feng <kai.heng.feng@canonical.com>
    xhci: Remove CONFIG_USB_DEFAULT_PERSIST to prevent xHCI from runtime suspending

Pavel Hofman <pavel.hofman@ivitera.com>
    usb: core: config: fix validation of wMaxPacketValue entries

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    USB: gadget: zero allocate endpoint 0 buffers

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    USB: gadget: detect too-big endpoint 0 requests

Dan Carpenter <dan.carpenter@oracle.com>
    net/qla3xxx: fix an error code in ql_adapter_up()

Eric Dumazet <edumazet@google.com>
    net, neigh: clear whole pneigh_entry at alloc time

Joakim Zhang <qiangqing.zhang@nxp.com>
    net: fec: only clear interrupt of handling queue in fec_enet_rx_queue()

Dan Carpenter <dan.carpenter@oracle.com>
    net: altera: set a couple error code in probe()

Lee Jones <lee.jones@linaro.org>
    net: cdc_ncm: Allow for dwNtbOutMaxSize to be unset or zero

Arnaldo Carvalho de Melo <acme@redhat.com>
    tools build: Remove needless libpython-version feature check that breaks test-all fast path

Herve Codina <herve.codina@bootlin.com>
    mtd: rawnand: fsmc: Take instruction delay into account

Mateusz Palczewski <mateusz.palczewski@intel.com>
    i40e: Fix pre-set max number of queues for VF

Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
    ASoC: qdsp6: q6routing: Fix return value from msm_routing_put_audio_mixer

Manish Chopra <manishc@marvell.com>
    qede: validate non LSO skb length

Davidlohr Bueso <dave@stgolabs.net>
    block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)

Steven Rostedt (VMware) <rostedt@goodmis.org>
    tracefs: Set all files to the same group ownership as the mount option

Eric Biggers <ebiggers@google.com>
    aio: fix use-after-free due to missing POLLFREE handling

Eric Biggers <ebiggers@google.com>
    aio: keep poll requests on waitqueue until completed

Eric Biggers <ebiggers@google.com>
    signalfd: use wake_up_pollfree()

Eric Biggers <ebiggers@google.com>
    binder: use wake_up_pollfree()

Eric Biggers <ebiggers@google.com>
    wait: add wake_up_pollfree()

Hannes Reinecke <hare@suse.de>
    libata: add horkage for ASMedia 1092

Tom Lendacky <thomas.lendacky@amd.com>
    x86/sme: Explicitly map new EFI memmap table as encrypted

Brian Silverman <brian.silverman@bluerivertech.com>
    can: m_can: Disable and ignore ELO interrupt

Vincent Mailhol <mailhol.vincent@wanadoo.fr>
    can: pch_can: pch_can_rx_normal: fix use after free

Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
    clk: qcom: regmap-mux: fix parent clock lookup

Steven Rostedt (VMware) <rostedt@goodmis.org>
    tracefs: Have new files inherit the ownership of their parent

Takashi Iwai <tiwai@suse.de>
    ALSA: pcm: oss: Handle missing errors in snd_pcm_oss_change_params*()

Takashi Iwai <tiwai@suse.de>
    ALSA: pcm: oss: Limit the period size to 16MB

Takashi Iwai <tiwai@suse.de>
    ALSA: pcm: oss: Fix negative period/buffer sizes

Alan Young <consult.awy@gmail.com>
    ALSA: ctl: Fix copy of updated id with element read/write

Manjong Lee <mj0123.lee@samsung.com>
    mm: bdi: initialize bdi_min_ratio when bdi is unregistered

Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
    IB/hfi1: Correct guard on eager buffer deallocation

Jianguo Wu <wujianguo@chinatelecom.cn>
    udp: using datalen to cap max gso segments

Andrea Mayer <andrea.mayer@uniroma2.it>
    seg6: fix the iif in the IPv6 socket control block

Jianglei Nie <niejianglei2021@163.com>
    nfp: Fix memory leak in nfp_cpp_area_cache_add()

Eric Dumazet <edumazet@google.com>
    bonding: make tx_rebalance_counter an atomic

Jesse Brandeburg <jesse.brandeburg@intel.com>
    ice: ignore dropped packets during init

Maxim Mikityanskiy <maximmi@nvidia.com>
    bpf: Fix the off-by-two error in range markings

Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
    nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done

Vlad Buslov <vladbu@mellanox.com>
    net: sched: use Qdisc rcu API instead of relying on rtnl lock

Vlad Buslov <vladbu@mellanox.com>
    net: sched: add helper function to take reference to Qdisc

Vlad Buslov <vladbu@mellanox.com>
    net: sched: extend Qdisc with rcu

Vlad Buslov <vladbu@mellanox.com>
    net: sched: rename qdisc_destroy() to qdisc_put()

Vlad Buslov <vladbu@mellanox.com>
    net: core: netlink: add helper refcount dec and lock function

Dan Carpenter <dan.carpenter@oracle.com>
    can: sja1000: fix use after free in ems_pcmcia_add_card()

Jimmy Assarsson <extja@kvaser.com>
    can: kvaser_usb: get CAN clock frequency from device

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    HID: check for valid USB device for many HID drivers

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    HID: wacom: fix problems when device is not a valid USB device

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    HID: add USB_HID dependancy on some USB HID drivers

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    HID: add USB_HID dependancy to hid-chicony

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    HID: add USB_HID dependancy to hid-prodikeys

Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    HID: add hid_is_usb() function to make it simpler for USB detection

xiazhengqiao <xiazhengqiao@huaqin.corp-partner.google.com>
    HID: google: add eel USB id


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

Diffstat:

 Makefile                                           |   4 +-
 arch/x86/Kconfig                                   |   1 +
 arch/x86/platform/efi/quirks.c                     |   3 +-
 block/ioprio.c                                     |   3 +
 drivers/android/binder.c                           |  21 +--
 drivers/ata/libata-core.c                          |   2 +
 drivers/clk/qcom/clk-regmap-mux.c                  |   2 +-
 drivers/clk/qcom/common.c                          |  12 ++
 drivers/clk/qcom/common.h                          |   2 +
 drivers/hid/Kconfig                                |  10 +-
 drivers/hid/hid-asus.c                             |   2 +-
 drivers/hid/hid-chicony.c                          |   8 +-
 drivers/hid/hid-corsair.c                          |   7 +-
 drivers/hid/hid-elan.c                             |   2 +-
 drivers/hid/hid-elo.c                              |   3 +
 drivers/hid/hid-google-hammer.c                    |   2 +
 drivers/hid/hid-holtek-kbd.c                       |   9 +-
 drivers/hid/hid-holtek-mouse.c                     |   9 +
 drivers/hid/hid-ids.h                              |   1 +
 drivers/hid/hid-lg.c                               |  10 +-
 drivers/hid/hid-prodikeys.c                        |  10 +-
 drivers/hid/hid-roccat-arvo.c                      |   3 +
 drivers/hid/hid-roccat-isku.c                      |   3 +
 drivers/hid/hid-roccat-kone.c                      |   3 +
 drivers/hid/hid-roccat-koneplus.c                  |   3 +
 drivers/hid/hid-roccat-konepure.c                  |   3 +
 drivers/hid/hid-roccat-kovaplus.c                  |   3 +
 drivers/hid/hid-roccat-lua.c                       |   3 +
 drivers/hid/hid-roccat-pyra.c                      |   3 +
 drivers/hid/hid-roccat-ryos.c                      |   3 +
 drivers/hid/hid-roccat-savu.c                      |   3 +
 drivers/hid/hid-samsung.c                          |   3 +
 drivers/hid/hid-uclogic.c                          |   3 +
 drivers/hid/wacom_sys.c                            |  19 ++-
 drivers/iio/accel/kxcjk-1013.c                     |   5 +-
 drivers/iio/accel/kxsd9.c                          |   6 +-
 drivers/iio/accel/mma8452.c                        |   2 +-
 drivers/iio/adc/at91-sama5d2_adc.c                 |   3 +-
 drivers/iio/adc/axp20x_adc.c                       |  18 +-
 drivers/iio/adc/dln2-adc.c                         |  21 ++-
 drivers/iio/gyro/itg3200_buffer.c                  |   2 +-
 drivers/iio/industrialio-trigger.c                 |   1 -
 drivers/iio/light/ltr501.c                         |   2 +-
 drivers/iio/light/stk3310.c                        |   6 +-
 drivers/iio/trigger/stm32-timer-trigger.c          |   2 +-
 drivers/infiniband/hw/hfi1/init.c                  |   2 +-
 drivers/irqchip/irq-armada-370-xp.c                |  16 +-
 drivers/irqchip/irq-gic-v3-its.c                   |   2 +-
 drivers/irqchip/irq-nvic.c                         |   2 +-
 drivers/mtd/nand/raw/fsmc_nand.c                   |   4 +
 drivers/net/bonding/bond_alb.c                     |  14 +-
 drivers/net/can/m_can/m_can.c                      |  14 +-
 drivers/net/can/pch_can.c                          |   2 +-
 drivers/net/can/sja1000/ems_pcmcia.c               |   7 +-
 drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c   | 101 +++++++----
 drivers/net/ethernet/altera/altera_tse_main.c      |   9 +-
 drivers/net/ethernet/freescale/fec.h               |   3 +
 drivers/net/ethernet/freescale/fec_main.c          |   2 +-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c |   5 -
 drivers/net/ethernet/intel/ice/ice_main.c          |   3 +
 .../ethernet/netronome/nfp/nfpcore/nfp_cppcore.c   |   4 +-
 drivers/net/ethernet/qlogic/qede/qede_fp.c         |   7 +
 drivers/net/ethernet/qlogic/qla3xxx.c              |  19 +--
 drivers/net/usb/cdc_ncm.c                          |   2 +
 drivers/usb/core/config.c                          |   6 +-
 drivers/usb/gadget/composite.c                     |  14 +-
 drivers/usb/gadget/legacy/dbgp.c                   |  15 +-
 drivers/usb/gadget/legacy/inode.c                  |  16 +-
 drivers/usb/host/xhci-hub.c                        |   1 +
 drivers/usb/host/xhci-ring.c                       |   1 -
 drivers/usb/host/xhci.c                            |  26 +--
 fs/aio.c                                           | 184 +++++++++++++++++----
 fs/signalfd.c                                      |  12 +-
 fs/tracefs/inode.c                                 |  76 +++++++++
 include/linux/hid.h                                |   5 +
 include/linux/rtnetlink.h                          |   7 +
 include/linux/wait.h                               |  26 +++
 include/net/bond_alb.h                             |   2 +-
 include/net/pkt_sched.h                            |   1 +
 include/net/sch_generic.h                          |  17 +-
 include/uapi/asm-generic/poll.h                    |   2 +-
 kernel/bpf/verifier.c                              |   2 +-
 kernel/sched/wait.c                                |   7 +
 mm/backing-dev.c                                   |   7 +
 net/core/neighbour.c                               |   2 +-
 net/core/rtnetlink.c                               |   6 +
 net/ipv4/udp.c                                     |   2 +-
 net/ipv6/seg6_iptunnel.c                           |   8 +
 net/nfc/netlink.c                                  |   6 +-
 net/sched/cls_api.c                                |  81 +++++++--
 net/sched/sch_api.c                                |  24 ++-
 net/sched/sch_atm.c                                |   2 +-
 net/sched/sch_cbq.c                                |   2 +-
 net/sched/sch_cbs.c                                |   2 +-
 net/sched/sch_drr.c                                |   4 +-
 net/sched/sch_dsmark.c                             |   2 +-
 net/sched/sch_fifo.c                               |   2 +-
 net/sched/sch_generic.c                            |  48 ++++--
 net/sched/sch_hfsc.c                               |   2 +-
 net/sched/sch_htb.c                                |   4 +-
 net/sched/sch_mq.c                                 |   4 +-
 net/sched/sch_mqprio.c                             |   4 +-
 net/sched/sch_multiq.c                             |   6 +-
 net/sched/sch_netem.c                              |   2 +-
 net/sched/sch_prio.c                               |   6 +-
 net/sched/sch_qfq.c                                |   4 +-
 net/sched/sch_red.c                                |   4 +-
 net/sched/sch_sfb.c                                |   4 +-
 net/sched/sch_tbf.c                                |   4 +-
 sound/core/control_compat.c                        |   3 +
 sound/core/oss/pcm_oss.c                           |  37 +++--
 sound/soc/qcom/qdsp6/q6routing.c                   |   8 +-
 tools/build/Makefile.feature                       |   1 -
 tools/build/feature/Makefile                       |   4 -
 tools/build/feature/test-all.c                     |   5 -
 tools/build/feature/test-libpython-version.c       |  11 --
 tools/perf/Makefile.config                         |   2 -
 117 files changed, 878 insertions(+), 319 deletions(-)

[PATCH 4.19 01/74] HID: google: add eel USB id

[Greg Kroah-Hartman]

From: xiazhengqiao <xiazhengqiao@huaqin.corp-partner.google.com>

commit caff009098e6cf59fd6ac21c3a3befcc854978b4 upstream.

Add one additional hammer-like device.

Signed-off-by: xiazhengqiao <xiazhengqiao@huaqin.corp-partner.google.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211203030119.28612-1-xiazhengqiao@huaqin.corp-partner.google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/hid/hid-google-hammer.c |    2 ++
 drivers/hid/hid-ids.h           |    1 +
 2 files changed, 3 insertions(+)

--- a/drivers/hid/hid-google-hammer.c
+++ b/drivers/hid/hid-google-hammer.c
@@ -121,6 +121,8 @@ static const struct hid_device_id hammer
 	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
 		     USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_DON) },
 	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
+		     USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_EEL) },
+	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
 		     USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_HAMMER) },
 	{ HID_DEVICE(BUS_USB, HID_GROUP_GENERIC,
 		     USB_VENDOR_ID_GOOGLE, USB_DEVICE_ID_GOOGLE_MAGNEMITE) },
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -479,6 +479,7 @@
 #define USB_DEVICE_ID_GOOGLE_MAGNEMITE	0x503d
 #define USB_DEVICE_ID_GOOGLE_MOONBALL	0x5044
 #define USB_DEVICE_ID_GOOGLE_DON	0x5050
+#define USB_DEVICE_ID_GOOGLE_EEL	0x5057
 
 #define USB_VENDOR_ID_GOTOP		0x08f2
 #define USB_DEVICE_ID_SUPER_Q2		0x007f

[PATCH 4.19 02/74] HID: add hid_is_usb() function to make it simpler for USB detection

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit f83baa0cb6cfc92ebaf7f9d3a99d7e34f2e77a8a upstream.

A number of HID drivers already call hid_is_using_ll_driver() but only
for the detection of if this is a USB device or not.  Make this more
obvious by creating hid_is_usb() and calling the function that way.

Also converts the existing hid_is_using_ll_driver() functions to use the
new call.

Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: linux-input@vger.kernel.org
Cc: stable@vger.kernel.org
Tested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211201183503.2373082-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/hid/hid-asus.c  |    2 +-
 drivers/hid/wacom_sys.c |    2 +-
 include/linux/hid.h     |    5 +++++
 3 files changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -622,7 +622,7 @@ static int asus_probe(struct hid_device
 	if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
 		drvdata->tp = &asus_i2c_tp;
 
-	if (drvdata->quirks & QUIRK_T100_KEYBOARD) {
+	if ((drvdata->quirks & QUIRK_T100_KEYBOARD) && hid_is_usb(hdev)) {
 		struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 
 		if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -2188,7 +2188,7 @@ static void wacom_update_name(struct wac
 	if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
 		char *product_name = wacom->hdev->name;
 
-		if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
+		if (hid_is_usb(wacom->hdev)) {
 			struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
 			struct usb_device *dev = interface_to_usbdev(intf);
 			product_name = dev->product;
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -834,6 +834,11 @@ static inline bool hid_is_using_ll_drive
 	return hdev->ll_driver == driver;
 }
 
+static inline bool hid_is_usb(struct hid_device *hdev)
+{
+	return hid_is_using_ll_driver(hdev, &usb_hid_driver);
+}
+
 #define	PM_HINT_FULLON	1<<5
 #define PM_HINT_NORMAL	1<<1
 

[PATCH 4.19 03/74] HID: add USB_HID dependancy to hid-prodikeys

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 30cb3c2ad24b66fb7639a6d1f4390c74d6e68f94 upstream.

The prodikeys HID driver only controls USB devices, yet did not have a
dependancy on USB_HID.  This causes build errors on some configurations
like nios2 when building due to new changes to the prodikeys driver.

Reported-by: kernel test robot <lkp@intel.com>
Cc: stable@vger.kernel.org
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211203081231.2856936-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/hid/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -219,7 +219,7 @@ config HID_COUGAR
 
 config HID_PRODIKEYS
 	tristate "Prodikeys PC-MIDI Keyboard support"
-	depends on HID && SND
+	depends on USB_HID && SND
 	select SND_RAWMIDI
 	---help---
 	Support for Prodikeys PC-MIDI Keyboard device support.

[PATCH 4.19 04/74] HID: add USB_HID dependancy to hid-chicony

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit d080811f27936f712f619f847389f403ac873b8f upstream.

The chicony HID driver only controls USB devices, yet did not have a
dependancy on USB_HID.  This causes build errors on some configurations
like sparc when building due to new changes to the chicony driver.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: stable@vger.kernel.org
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211203075927.2829218-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/hid/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -191,7 +191,7 @@ config HID_CHERRY
 
 config HID_CHICONY
 	tristate "Chicony devices"
-	depends on HID
+	depends on USB_HID
 	default !EXPERT
 	---help---
 	Support for Chicony Tactical pad and special keys on Chicony keyboards.

[PATCH 4.19 05/74] HID: add USB_HID dependancy on some USB HID drivers

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit f237d9028f844a86955fc9da59d7ac4a5c55d7d5 upstream.

Some HID drivers are only for USB drivers, yet did not depend on
CONFIG_USB_HID.  This was hidden by the fact that the USB functions were
stubbed out in the past, but now that drivers are checking for USB
devices properly, build errors can occur with some random
configurations.

Reported-by: kernel test robot <lkp@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211202114819.2511954-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/hid/Kconfig |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -198,7 +198,7 @@ config HID_CHICONY
 
 config HID_CORSAIR
 	tristate "Corsair devices"
-	depends on HID && USB && LEDS_CLASS
+	depends on USB_HID && LEDS_CLASS
 	---help---
 	Support for Corsair devices that are not fully compliant with the
 	HID standard.
@@ -484,7 +484,7 @@ config HID_LENOVO
 
 config HID_LOGITECH
 	tristate "Logitech devices"
-	depends on HID
+	depends on USB_HID
 	default !EXPERT
 	---help---
 	Support for Logitech devices that are not fully compliant with HID standard.
@@ -822,7 +822,7 @@ config HID_SAITEK
 
 config HID_SAMSUNG
 	tristate "Samsung InfraRed remote control or keyboards"
-	depends on HID
+	depends on USB_HID
 	---help---
 	Support for Samsung InfraRed remote control or keyboards.
 

[PATCH 4.19 06/74] HID: wacom: fix problems when device is not a valid USB device

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 720ac467204a70308bd687927ed475afb904e11b upstream.

The wacom driver accepts devices of more than just USB types, but some
code paths can cause problems if the device being controlled is not a
USB device due to a lack of checking.  Add the needed checks to ensure
that the USB device accesses are only happening on a "real" USB device,
and not one on some other bus.

Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: linux-input@vger.kernel.org
Cc: stable@vger.kernel.org
Tested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211201183503.2373082-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/hid/wacom_sys.c |   17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -697,7 +697,7 @@ static void wacom_retrieve_hid_descripto
 	 * Skip the query for this type and modify defaults based on
 	 * interface number.
 	 */
-	if (features->type == WIRELESS) {
+	if (features->type == WIRELESS && intf) {
 		if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
 			features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
 		else
@@ -2419,6 +2419,9 @@ static void wacom_wireless_work(struct w
 
 	wacom_destroy_battery(wacom);
 
+	if (!usbdev)
+		return;
+
 	/* Stylus interface */
 	hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
 	wacom1 = hid_get_drvdata(hdev1);
@@ -2698,8 +2701,6 @@ static void wacom_mode_change_work(struc
 static int wacom_probe(struct hid_device *hdev,
 		const struct hid_device_id *id)
 {
-	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
-	struct usb_device *dev = interface_to_usbdev(intf);
 	struct wacom *wacom;
 	struct wacom_wac *wacom_wac;
 	struct wacom_features *features;
@@ -2736,8 +2737,14 @@ static int wacom_probe(struct hid_device
 	wacom_wac->hid_data.inputmode = -1;
 	wacom_wac->mode_report = -1;
 
-	wacom->usbdev = dev;
-	wacom->intf = intf;
+	if (hid_is_usb(hdev)) {
+		struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+		struct usb_device *dev = interface_to_usbdev(intf);
+
+		wacom->usbdev = dev;
+		wacom->intf = intf;
+	}
+
 	mutex_init(&wacom->lock);
 	INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
 	INIT_WORK(&wacom->wireless_work, wacom_wireless_work);

[PATCH 4.19 07/74] HID: check for valid USB device for many HID drivers

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 93020953d0fa7035fd036ad87a47ae2b7aa4ae33 upstream.

Many HID drivers assume that the HID device assigned to them is a USB
device as that was the only way HID devices used to be able to be
created in Linux.  However, with the additional ways that HID devices
can be created for many different bus types, that is no longer true, so
properly check that we have a USB device associated with the HID device
before allowing a driver that makes this assumption to claim it.

Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Michael Zaidman <michael.zaidman@gmail.com>
Cc: Stefan Achatz <erazor_de@users.sourceforge.net>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: linux-input@vger.kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
[bentiss: amended for thrustmater.c hunk to apply]
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211201183503.2373082-3-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/hid/hid-chicony.c         |    8 ++++++--
 drivers/hid/hid-corsair.c         |    7 ++++++-
 drivers/hid/hid-elan.c            |    2 +-
 drivers/hid/hid-elo.c             |    3 +++
 drivers/hid/hid-holtek-kbd.c      |    9 +++++++--
 drivers/hid/hid-holtek-mouse.c    |    9 +++++++++
 drivers/hid/hid-lg.c              |   10 ++++++++--
 drivers/hid/hid-prodikeys.c       |   10 ++++++++--
 drivers/hid/hid-roccat-arvo.c     |    3 +++
 drivers/hid/hid-roccat-isku.c     |    3 +++
 drivers/hid/hid-roccat-kone.c     |    3 +++
 drivers/hid/hid-roccat-koneplus.c |    3 +++
 drivers/hid/hid-roccat-konepure.c |    3 +++
 drivers/hid/hid-roccat-kovaplus.c |    3 +++
 drivers/hid/hid-roccat-lua.c      |    3 +++
 drivers/hid/hid-roccat-pyra.c     |    3 +++
 drivers/hid/hid-roccat-ryos.c     |    3 +++
 drivers/hid/hid-roccat-savu.c     |    3 +++
 drivers/hid/hid-samsung.c         |    3 +++
 drivers/hid/hid-uclogic.c         |    3 +++
 20 files changed, 84 insertions(+), 10 deletions(-)

--- a/drivers/hid/hid-chicony.c
+++ b/drivers/hid/hid-chicony.c
@@ -61,8 +61,12 @@ static int ch_input_mapping(struct hid_d
 static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 		unsigned int *rsize)
 {
-	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
-	
+	struct usb_interface *intf;
+
+	if (!hid_is_usb(hdev))
+		return rdesc;
+
+	intf = to_usb_interface(hdev->dev.parent);
 	if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
 		/* Change usage maximum and logical maximum from 0x7fff to
 		 * 0x2fff, so they don't exceed HID_MAX_USAGES */
--- a/drivers/hid/hid-corsair.c
+++ b/drivers/hid/hid-corsair.c
@@ -556,7 +556,12 @@ static int corsair_probe(struct hid_devi
 	int ret;
 	unsigned long quirks = id->driver_data;
 	struct corsair_drvdata *drvdata;
-	struct usb_interface *usbif = to_usb_interface(dev->dev.parent);
+	struct usb_interface *usbif;
+
+	if (!hid_is_usb(dev))
+		return -EINVAL;
+
+	usbif = to_usb_interface(dev->dev.parent);
 
 	drvdata = devm_kzalloc(&dev->dev, sizeof(struct corsair_drvdata),
 			       GFP_KERNEL);
--- a/drivers/hid/hid-elan.c
+++ b/drivers/hid/hid-elan.c
@@ -54,7 +54,7 @@ struct elan_drvdata {
 
 static int is_not_elan_touchpad(struct hid_device *hdev)
 {
-	if (hdev->bus == BUS_USB) {
+	if (hid_is_usb(hdev)) {
 		struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 
 		return (intf->altsetting->desc.bInterfaceNumber !=
--- a/drivers/hid/hid-elo.c
+++ b/drivers/hid/hid-elo.c
@@ -230,6 +230,9 @@ static int elo_probe(struct hid_device *
 	struct elo_priv *priv;
 	int ret;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
--- a/drivers/hid/hid-holtek-kbd.c
+++ b/drivers/hid/hid-holtek-kbd.c
@@ -143,12 +143,17 @@ static int holtek_kbd_input_event(struct
 static int holtek_kbd_probe(struct hid_device *hdev,
 		const struct hid_device_id *id)
 {
-	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
-	int ret = hid_parse(hdev);
+	struct usb_interface *intf;
+	int ret;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
+	ret = hid_parse(hdev);
 	if (!ret)
 		ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 
+	intf = to_usb_interface(hdev->dev.parent);
 	if (!ret && intf->cur_altsetting->desc.bInterfaceNumber == 1) {
 		struct hid_input *hidinput;
 		list_for_each_entry(hidinput, &hdev->inputs, list) {
--- a/drivers/hid/hid-holtek-mouse.c
+++ b/drivers/hid/hid-holtek-mouse.c
@@ -65,6 +65,14 @@ static __u8 *holtek_mouse_report_fixup(s
 	return rdesc;
 }
 
+static int holtek_mouse_probe(struct hid_device *hdev,
+			      const struct hid_device_id *id)
+{
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+	return 0;
+}
+
 static const struct hid_device_id holtek_mouse_devices[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
 			USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
@@ -86,6 +94,7 @@ static struct hid_driver holtek_mouse_dr
 	.name = "holtek_mouse",
 	.id_table = holtek_mouse_devices,
 	.report_fixup = holtek_mouse_report_fixup,
+	.probe = holtek_mouse_probe,
 };
 
 module_hid_driver(holtek_mouse_driver);
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -714,12 +714,18 @@ static int lg_raw_event(struct hid_devic
 
 static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
-	struct usb_interface *iface = to_usb_interface(hdev->dev.parent);
-	__u8 iface_num = iface->cur_altsetting->desc.bInterfaceNumber;
+	struct usb_interface *iface;
+	__u8 iface_num;
 	unsigned int connect_mask = HID_CONNECT_DEFAULT;
 	struct lg_drv_data *drv_data;
 	int ret;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
+	iface = to_usb_interface(hdev->dev.parent);
+	iface_num = iface->cur_altsetting->desc.bInterfaceNumber;
+
 	/* G29 only work with the 1st interface */
 	if ((hdev->product == USB_DEVICE_ID_LOGITECH_G29_WHEEL) &&
 	    (iface_num != 0)) {
--- a/drivers/hid/hid-prodikeys.c
+++ b/drivers/hid/hid-prodikeys.c
@@ -802,12 +802,18 @@ static int pk_raw_event(struct hid_devic
 static int pk_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
 	int ret;
-	struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
-	unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
+	struct usb_interface *intf;
+	unsigned short ifnum;
 	unsigned long quirks = id->driver_data;
 	struct pk_device *pk;
 	struct pcmidi_snd *pm = NULL;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
+	intf = to_usb_interface(hdev->dev.parent);
+	ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
+
 	pk = kzalloc(sizeof(*pk), GFP_KERNEL);
 	if (pk == NULL) {
 		hid_err(hdev, "can't alloc descriptor\n");
--- a/drivers/hid/hid-roccat-arvo.c
+++ b/drivers/hid/hid-roccat-arvo.c
@@ -347,6 +347,9 @@ static int arvo_probe(struct hid_device
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-isku.c
+++ b/drivers/hid/hid-roccat-isku.c
@@ -327,6 +327,9 @@ static int isku_probe(struct hid_device
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-kone.c
+++ b/drivers/hid/hid-roccat-kone.c
@@ -752,6 +752,9 @@ static int kone_probe(struct hid_device
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-koneplus.c
+++ b/drivers/hid/hid-roccat-koneplus.c
@@ -434,6 +434,9 @@ static int koneplus_probe(struct hid_dev
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-konepure.c
+++ b/drivers/hid/hid-roccat-konepure.c
@@ -136,6 +136,9 @@ static int konepure_probe(struct hid_dev
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-kovaplus.c
+++ b/drivers/hid/hid-roccat-kovaplus.c
@@ -504,6 +504,9 @@ static int kovaplus_probe(struct hid_dev
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-lua.c
+++ b/drivers/hid/hid-roccat-lua.c
@@ -163,6 +163,9 @@ static int lua_probe(struct hid_device *
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-pyra.c
+++ b/drivers/hid/hid-roccat-pyra.c
@@ -452,6 +452,9 @@ static int pyra_probe(struct hid_device
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-ryos.c
+++ b/drivers/hid/hid-roccat-ryos.c
@@ -144,6 +144,9 @@ static int ryos_probe(struct hid_device
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-roccat-savu.c
+++ b/drivers/hid/hid-roccat-savu.c
@@ -116,6 +116,9 @@ static int savu_probe(struct hid_device
 {
 	int retval;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	retval = hid_parse(hdev);
 	if (retval) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-samsung.c
+++ b/drivers/hid/hid-samsung.c
@@ -157,6 +157,9 @@ static int samsung_probe(struct hid_devi
 	int ret;
 	unsigned int cmask = HID_CONNECT_DEFAULT;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	ret = hid_parse(hdev);
 	if (ret) {
 		hid_err(hdev, "parse failed\n");
--- a/drivers/hid/hid-uclogic.c
+++ b/drivers/hid/hid-uclogic.c
@@ -791,6 +791,9 @@ static int uclogic_tablet_enable(struct
 	__u8 *p;
 	s32 v;
 
+	if (!hid_is_usb(hdev))
+		return -EINVAL;
+
 	/*
 	 * Read string descriptor containing tablet parameters. The specific
 	 * string descriptor and data were discovered by sniffing the Windows

[PATCH 4.19 08/74] can: kvaser_usb: get CAN clock frequency from device

[Greg Kroah-Hartman]

From: Jimmy Assarsson <extja@kvaser.com>

commit fb12797ab1fef480ad8a32a30984844444eeb00d upstream.

The CAN clock frequency is used when calculating the CAN bittiming
parameters. When wrong clock frequency is used, the device may end up
with wrong bittiming parameters, depending on user requested bittiming
parameters.

To avoid this, get the CAN clock frequency from the device. Various
existing Kvaser Leaf products use different CAN clocks.

Fixes: 080f40a6fa28 ("can: kvaser_usb: Add support for Kvaser CAN/USB devices")
Link: https://lore.kernel.org/all/20211208152122.250852-2-extja@kvaser.com
Cc: stable@vger.kernel.org
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c |  101 ++++++++++++++++-------
 1 file changed, 73 insertions(+), 28 deletions(-)

--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
@@ -28,10 +28,6 @@
 
 #include "kvaser_usb.h"
 
-/* Forward declaration */
-static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg;
-
-#define CAN_USB_CLOCK			8000000
 #define MAX_USBCAN_NET_DEVICES		2
 
 /* Command header size */
@@ -80,6 +76,12 @@ static const struct kvaser_usb_dev_cfg k
 
 #define CMD_LEAF_LOG_MESSAGE		106
 
+/* Leaf frequency options */
+#define KVASER_USB_LEAF_SWOPTION_FREQ_MASK 0x60
+#define KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK 0
+#define KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK BIT(5)
+#define KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK BIT(6)
+
 /* error factors */
 #define M16C_EF_ACKE			BIT(0)
 #define M16C_EF_CRCE			BIT(1)
@@ -340,6 +342,50 @@ struct kvaser_usb_err_summary {
 	};
 };
 
+static const struct can_bittiming_const kvaser_usb_leaf_bittiming_const = {
+	.name = "kvaser_usb",
+	.tseg1_min = KVASER_USB_TSEG1_MIN,
+	.tseg1_max = KVASER_USB_TSEG1_MAX,
+	.tseg2_min = KVASER_USB_TSEG2_MIN,
+	.tseg2_max = KVASER_USB_TSEG2_MAX,
+	.sjw_max = KVASER_USB_SJW_MAX,
+	.brp_min = KVASER_USB_BRP_MIN,
+	.brp_max = KVASER_USB_BRP_MAX,
+	.brp_inc = KVASER_USB_BRP_INC,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_8mhz = {
+	.clock = {
+		.freq = 8000000,
+	},
+	.timestamp_freq = 1,
+	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_16mhz = {
+	.clock = {
+		.freq = 16000000,
+	},
+	.timestamp_freq = 1,
+	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_24mhz = {
+	.clock = {
+		.freq = 24000000,
+	},
+	.timestamp_freq = 1,
+	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg_32mhz = {
+	.clock = {
+		.freq = 32000000,
+	},
+	.timestamp_freq = 1,
+	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
+};
+
 static void *
 kvaser_usb_leaf_frame_to_cmd(const struct kvaser_usb_net_priv *priv,
 			     const struct sk_buff *skb, int *frame_len,
@@ -471,6 +517,27 @@ static int kvaser_usb_leaf_send_simple_c
 	return rc;
 }
 
+static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev,
+						   const struct leaf_cmd_softinfo *softinfo)
+{
+	u32 sw_options = le32_to_cpu(softinfo->sw_options);
+
+	dev->fw_version = le32_to_cpu(softinfo->fw_version);
+	dev->max_tx_urbs = le16_to_cpu(softinfo->max_outstanding_tx);
+
+	switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
+	case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
+		dev->cfg = &kvaser_usb_leaf_dev_cfg_16mhz;
+		break;
+	case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
+		dev->cfg = &kvaser_usb_leaf_dev_cfg_24mhz;
+		break;
+	case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
+		dev->cfg = &kvaser_usb_leaf_dev_cfg_32mhz;
+		break;
+	}
+}
+
 static int kvaser_usb_leaf_get_software_info_inner(struct kvaser_usb *dev)
 {
 	struct kvaser_cmd cmd;
@@ -486,14 +553,13 @@ static int kvaser_usb_leaf_get_software_
 
 	switch (dev->card_data.leaf.family) {
 	case KVASER_LEAF:
-		dev->fw_version = le32_to_cpu(cmd.u.leaf.softinfo.fw_version);
-		dev->max_tx_urbs =
-			le16_to_cpu(cmd.u.leaf.softinfo.max_outstanding_tx);
+		kvaser_usb_leaf_get_software_info_leaf(dev, &cmd.u.leaf.softinfo);
 		break;
 	case KVASER_USBCAN:
 		dev->fw_version = le32_to_cpu(cmd.u.usbcan.softinfo.fw_version);
 		dev->max_tx_urbs =
 			le16_to_cpu(cmd.u.usbcan.softinfo.max_outstanding_tx);
+		dev->cfg = &kvaser_usb_leaf_dev_cfg_8mhz;
 		break;
 	}
 
@@ -1225,24 +1291,11 @@ static int kvaser_usb_leaf_init_card(str
 {
 	struct kvaser_usb_dev_card_data *card_data = &dev->card_data;
 
-	dev->cfg = &kvaser_usb_leaf_dev_cfg;
 	card_data->ctrlmode_supported |= CAN_CTRLMODE_3_SAMPLES;
 
 	return 0;
 }
 
-static const struct can_bittiming_const kvaser_usb_leaf_bittiming_const = {
-	.name = "kvaser_usb",
-	.tseg1_min = KVASER_USB_TSEG1_MIN,
-	.tseg1_max = KVASER_USB_TSEG1_MAX,
-	.tseg2_min = KVASER_USB_TSEG2_MIN,
-	.tseg2_max = KVASER_USB_TSEG2_MAX,
-	.sjw_max = KVASER_USB_SJW_MAX,
-	.brp_min = KVASER_USB_BRP_MIN,
-	.brp_max = KVASER_USB_BRP_MAX,
-	.brp_inc = KVASER_USB_BRP_INC,
-};
-
 static int kvaser_usb_leaf_set_bittiming(struct net_device *netdev)
 {
 	struct kvaser_usb_net_priv *priv = netdev_priv(netdev);
@@ -1348,11 +1401,3 @@ const struct kvaser_usb_dev_ops kvaser_u
 	.dev_read_bulk_callback = kvaser_usb_leaf_read_bulk_callback,
 	.dev_frame_to_cmd = kvaser_usb_leaf_frame_to_cmd,
 };
-
-static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_dev_cfg = {
-	.clock = {
-		.freq = CAN_USB_CLOCK,
-	},
-	.timestamp_freq = 1,
-	.bittiming_const = &kvaser_usb_leaf_bittiming_const,
-};

[PATCH 4.19 09/74] can: sja1000: fix use after free in ems_pcmcia_add_card()

[Greg Kroah-Hartman]

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

commit 3ec6ca6b1a8e64389f0212b5a1b0f6fed1909e45 upstream.

If the last channel is not available then "dev" is freed.  Fortunately,
we can just use "pdev->irq" instead.

Also we should check if at least one channel was set up.

Fixes: fd734c6f25ae ("can/sja1000: add driver for EMS PCMCIA card")
Link: https://lore.kernel.org/all/20211124145041.GB13656@kili
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/can/sja1000/ems_pcmcia.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/net/can/sja1000/ems_pcmcia.c
+++ b/drivers/net/can/sja1000/ems_pcmcia.c
@@ -243,7 +243,12 @@ static int ems_pcmcia_add_card(struct pc
 			free_sja1000dev(dev);
 	}
 
-	err = request_irq(dev->irq, &ems_pcmcia_interrupt, IRQF_SHARED,
+	if (!card->channels) {
+		err = -ENODEV;
+		goto failure_cleanup;
+	}
+
+	err = request_irq(pdev->irq, &ems_pcmcia_interrupt, IRQF_SHARED,
 			  DRV_NAME, card);
 	if (!err)
 		return 0;

[PATCH 4.19 10/74] net: core: netlink: add helper refcount dec and lock function

[Greg Kroah-Hartman]

From: Vlad Buslov <vladbu@mellanox.com>

[ Upstream commit 6f99528e9797794b91b43321fbbc93fe772b0803 ]

Rtnl lock is encapsulated in netlink and cannot be accessed by other
modules directly. This means that reference counted objects that rely on
rtnl lock cannot use it with refcounter helper function that atomically
releases decrements reference and obtains mutex.

This patch implements simple wrapper function around refcount_dec_and_lock
that obtains rtnl lock if reference counter value reached 0.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[Lee: Sent to Stable]
Link: https://syzkaller.appspot.com/bug?id=d7e411c5472dd5da33d8cc921ccadc747743a568
Reported-by: syzbot+5f229e48cccc804062c0@syzkaller.appspotmail.com
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/rtnetlink.h |    2 ++
 net/core/rtnetlink.c      |    6 ++++++
 2 files changed, 8 insertions(+)

--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -6,6 +6,7 @@
 #include <linux/mutex.h>
 #include <linux/netdevice.h>
 #include <linux/wait.h>
+#include <linux/refcount.h>
 #include <uapi/linux/rtnetlink.h>
 
 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
@@ -34,6 +35,7 @@ extern void rtnl_unlock(void);
 extern int rtnl_trylock(void);
 extern int rtnl_is_locked(void);
 extern int rtnl_lock_killable(void);
+extern bool refcount_dec_and_rtnl_lock(refcount_t *r);
 
 extern wait_queue_head_t netdev_unregistering_wq;
 extern struct rw_semaphore pernet_ops_rwsem;
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -130,6 +130,12 @@ int rtnl_is_locked(void)
 }
 EXPORT_SYMBOL(rtnl_is_locked);
 
+bool refcount_dec_and_rtnl_lock(refcount_t *r)
+{
+	return refcount_dec_and_mutex_lock(r, &rtnl_mutex);
+}
+EXPORT_SYMBOL(refcount_dec_and_rtnl_lock);
+
 #ifdef CONFIG_PROVE_LOCKING
 bool lockdep_rtnl_is_held(void)
 {

[PATCH 4.19 11/74] net: sched: rename qdisc_destroy() to qdisc_put()

[Greg Kroah-Hartman]

From: Vlad Buslov <vladbu@mellanox.com>

[ Upstream commit 86bd446b5cebd783187ea3772ff258210de77d99 ]

Current implementation of qdisc_destroy() decrements Qdisc reference
counter and only actually destroy Qdisc if reference counter value reached
zero. Rename qdisc_destroy() to qdisc_put() in order for it to better
describe the way in which this function currently implemented and used.

Extract code that deallocates Qdisc into new private qdisc_destroy()
function. It is intended to be shared between regular qdisc_put() and its
unlocked version that is introduced in next patch in this series.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[Lee: Sent to Stable]
Link: https://syzkaller.appspot.com/bug?id=d7e411c5472dd5da33d8cc921ccadc747743a568
Reported-by: syzbot+5f229e48cccc804062c0@syzkaller.appspotmail.com
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/net/sch_generic.h |    2 +-
 net/sched/sch_api.c       |    6 +++---
 net/sched/sch_atm.c       |    2 +-
 net/sched/sch_cbq.c       |    2 +-
 net/sched/sch_cbs.c       |    2 +-
 net/sched/sch_drr.c       |    4 ++--
 net/sched/sch_dsmark.c    |    2 +-
 net/sched/sch_fifo.c      |    2 +-
 net/sched/sch_generic.c   |   23 ++++++++++++++---------
 net/sched/sch_hfsc.c      |    2 +-
 net/sched/sch_htb.c       |    4 ++--
 net/sched/sch_mq.c        |    4 ++--
 net/sched/sch_mqprio.c    |    4 ++--
 net/sched/sch_multiq.c    |    6 +++---
 net/sched/sch_netem.c     |    2 +-
 net/sched/sch_prio.c      |    6 +++---
 net/sched/sch_qfq.c       |    4 ++--
 net/sched/sch_red.c       |    4 ++--
 net/sched/sch_sfb.c       |    4 ++--
 net/sched/sch_tbf.c       |    4 ++--
 20 files changed, 47 insertions(+), 42 deletions(-)

--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -559,7 +559,7 @@ void dev_deactivate_many(struct list_hea
 struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
 			      struct Qdisc *qdisc);
 void qdisc_reset(struct Qdisc *qdisc);
-void qdisc_destroy(struct Qdisc *qdisc);
+void qdisc_put(struct Qdisc *qdisc);
 void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n,
 			       unsigned int len);
 struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -928,7 +928,7 @@ static void notify_and_destroy(struct ne
 		qdisc_notify(net, skb, n, clid, old, new);
 
 	if (old)
-		qdisc_destroy(old);
+		qdisc_put(old);
 }
 
 /* Graft qdisc "new" to class "classid" of qdisc "parent" or
@@ -981,7 +981,7 @@ static int qdisc_graft(struct net_device
 				qdisc_refcount_inc(new);
 
 			if (!ingress)
-				qdisc_destroy(old);
+				qdisc_put(old);
 		}
 
 skip:
@@ -1589,7 +1589,7 @@ graft:
 	err = qdisc_graft(dev, p, skb, n, clid, q, NULL, extack);
 	if (err) {
 		if (q)
-			qdisc_destroy(q);
+			qdisc_put(q);
 		return err;
 	}
 
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -150,7 +150,7 @@ static void atm_tc_put(struct Qdisc *sch
 	pr_debug("atm_tc_put: destroying\n");
 	list_del_init(&flow->list);
 	pr_debug("atm_tc_put: qdisc %p\n", flow->q);
-	qdisc_destroy(flow->q);
+	qdisc_put(flow->q);
 	tcf_block_put(flow->block);
 	if (flow->sock) {
 		pr_debug("atm_tc_put: f_count %ld\n",
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1439,7 +1439,7 @@ static void cbq_destroy_class(struct Qdi
 	WARN_ON(cl->filters);
 
 	tcf_block_put(cl->block);
-	qdisc_destroy(cl->q);
+	qdisc_put(cl->q);
 	qdisc_put_rtab(cl->R_tab);
 	gen_kill_estimator(&cl->rate_est);
 	if (cl != &q->link)
--- a/net/sched/sch_cbs.c
+++ b/net/sched/sch_cbs.c
@@ -452,7 +452,7 @@ static void cbs_destroy(struct Qdisc *sc
 	cbs_disable_offload(dev, q);
 
 	if (q->qdisc)
-		qdisc_destroy(q->qdisc);
+		qdisc_put(q->qdisc);
 }
 
 static int cbs_dump(struct Qdisc *sch, struct sk_buff *skb)
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -134,7 +134,7 @@ static int drr_change_class(struct Qdisc
 					    tca[TCA_RATE]);
 		if (err) {
 			NL_SET_ERR_MSG(extack, "Failed to replace estimator");
-			qdisc_destroy(cl->qdisc);
+			qdisc_put(cl->qdisc);
 			kfree(cl);
 			return err;
 		}
@@ -153,7 +153,7 @@ static int drr_change_class(struct Qdisc
 static void drr_destroy_class(struct Qdisc *sch, struct drr_class *cl)
 {
 	gen_kill_estimator(&cl->rate_est);
-	qdisc_destroy(cl->qdisc);
+	qdisc_put(cl->qdisc);
 	kfree(cl);
 }
 
--- a/net/sched/sch_dsmark.c
+++ b/net/sched/sch_dsmark.c
@@ -415,7 +415,7 @@ static void dsmark_destroy(struct Qdisc
 	pr_debug("%s(sch %p,[qdisc %p])\n", __func__, sch, p);
 
 	tcf_block_put(p->block);
-	qdisc_destroy(p->q);
+	qdisc_put(p->q);
 	if (p->mv != p->embedded)
 		kfree(p->mv);
 }
--- a/net/sched/sch_fifo.c
+++ b/net/sched/sch_fifo.c
@@ -180,7 +180,7 @@ struct Qdisc *fifo_create_dflt(struct Qd
 	if (q) {
 		err = fifo_set_limit(q, limit);
 		if (err < 0) {
-			qdisc_destroy(q);
+			qdisc_put(q);
 			q = NULL;
 		}
 	}
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -918,7 +918,7 @@ struct Qdisc *qdisc_create_dflt(struct n
 	if (!ops->init || ops->init(sch, NULL, extack) == 0)
 		return sch;
 
-	qdisc_destroy(sch);
+	qdisc_put(sch);
 	return NULL;
 }
 EXPORT_SYMBOL(qdisc_create_dflt);
@@ -958,7 +958,7 @@ void qdisc_free(struct Qdisc *qdisc)
 	kfree((char *) qdisc - qdisc->padded);
 }
 
-void qdisc_destroy(struct Qdisc *qdisc)
+static void qdisc_destroy(struct Qdisc *qdisc)
 {
 	const struct Qdisc_ops *ops;
 	struct sk_buff *skb, *tmp;
@@ -967,10 +967,6 @@ void qdisc_destroy(struct Qdisc *qdisc)
 		return;
 	ops = qdisc->ops;
 
-	if (qdisc->flags & TCQ_F_BUILTIN ||
-	    !refcount_dec_and_test(&qdisc->refcnt))
-		return;
-
 #ifdef CONFIG_NET_SCHED
 	qdisc_hash_del(qdisc);
 
@@ -997,7 +993,16 @@ void qdisc_destroy(struct Qdisc *qdisc)
 
 	qdisc_free(qdisc);
 }
-EXPORT_SYMBOL(qdisc_destroy);
+
+void qdisc_put(struct Qdisc *qdisc)
+{
+	if (qdisc->flags & TCQ_F_BUILTIN ||
+	    !refcount_dec_and_test(&qdisc->refcnt))
+		return;
+
+	qdisc_destroy(qdisc);
+}
+EXPORT_SYMBOL(qdisc_put);
 
 /* Attach toplevel qdisc to device queue. */
 struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
@@ -1318,7 +1323,7 @@ static void shutdown_scheduler_queue(str
 		rcu_assign_pointer(dev_queue->qdisc, qdisc_default);
 		dev_queue->qdisc_sleeping = qdisc_default;
 
-		qdisc_destroy(qdisc);
+		qdisc_put(qdisc);
 	}
 }
 
@@ -1327,7 +1332,7 @@ void dev_shutdown(struct net_device *dev
 	netdev_for_each_tx_queue(dev, shutdown_scheduler_queue, &noop_qdisc);
 	if (dev_ingress_queue(dev))
 		shutdown_scheduler_queue(dev, dev_ingress_queue(dev), &noop_qdisc);
-	qdisc_destroy(dev->qdisc);
+	qdisc_put(dev->qdisc);
 	dev->qdisc = &noop_qdisc;
 
 	WARN_ON(timer_pending(&dev->watchdog_timer));
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1092,7 +1092,7 @@ hfsc_destroy_class(struct Qdisc *sch, st
 	struct hfsc_sched *q = qdisc_priv(sch);
 
 	tcf_block_put(cl->block);
-	qdisc_destroy(cl->qdisc);
+	qdisc_put(cl->qdisc);
 	gen_kill_estimator(&cl->rate_est);
 	if (cl != &q->root)
 		kfree(cl);
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1224,7 +1224,7 @@ static void htb_destroy_class(struct Qdi
 {
 	if (!cl->level) {
 		WARN_ON(!cl->un.leaf.q);
-		qdisc_destroy(cl->un.leaf.q);
+		qdisc_put(cl->un.leaf.q);
 	}
 	gen_kill_estimator(&cl->rate_est);
 	tcf_block_put(cl->block);
@@ -1425,7 +1425,7 @@ static int htb_change_class(struct Qdisc
 			/* turn parent into inner node */
 			qdisc_reset(parent->un.leaf.q);
 			qdisc_tree_reduce_backlog(parent->un.leaf.q, qlen, backlog);
-			qdisc_destroy(parent->un.leaf.q);
+			qdisc_put(parent->un.leaf.q);
 			if (parent->prio_activity)
 				htb_deactivate(q, parent);
 
--- a/net/sched/sch_mq.c
+++ b/net/sched/sch_mq.c
@@ -65,7 +65,7 @@ static void mq_destroy(struct Qdisc *sch
 	if (!priv->qdiscs)
 		return;
 	for (ntx = 0; ntx < dev->num_tx_queues && priv->qdiscs[ntx]; ntx++)
-		qdisc_destroy(priv->qdiscs[ntx]);
+		qdisc_put(priv->qdiscs[ntx]);
 	kfree(priv->qdiscs);
 }
 
@@ -119,7 +119,7 @@ static void mq_attach(struct Qdisc *sch)
 		qdisc = priv->qdiscs[ntx];
 		old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
 		if (old)
-			qdisc_destroy(old);
+			qdisc_put(old);
 #ifdef CONFIG_NET_SCHED
 		if (ntx < dev->real_num_tx_queues)
 			qdisc_hash_add(qdisc, false);
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -40,7 +40,7 @@ static void mqprio_destroy(struct Qdisc
 		for (ntx = 0;
 		     ntx < dev->num_tx_queues && priv->qdiscs[ntx];
 		     ntx++)
-			qdisc_destroy(priv->qdiscs[ntx]);
+			qdisc_put(priv->qdiscs[ntx]);
 		kfree(priv->qdiscs);
 	}
 
@@ -300,7 +300,7 @@ static void mqprio_attach(struct Qdisc *
 		qdisc = priv->qdiscs[ntx];
 		old = dev_graft_qdisc(qdisc->dev_queue, qdisc);
 		if (old)
-			qdisc_destroy(old);
+			qdisc_put(old);
 		if (ntx < dev->real_num_tx_queues)
 			qdisc_hash_add(qdisc, false);
 	}
--- a/net/sched/sch_multiq.c
+++ b/net/sched/sch_multiq.c
@@ -175,7 +175,7 @@ multiq_destroy(struct Qdisc *sch)
 
 	tcf_block_put(q->block);
 	for (band = 0; band < q->bands; band++)
-		qdisc_destroy(q->queues[band]);
+		qdisc_put(q->queues[band]);
 
 	kfree(q->queues);
 }
@@ -204,7 +204,7 @@ static int multiq_tune(struct Qdisc *sch
 			q->queues[i] = &noop_qdisc;
 			qdisc_tree_reduce_backlog(child, child->q.qlen,
 						  child->qstats.backlog);
-			qdisc_destroy(child);
+			qdisc_put(child);
 		}
 	}
 
@@ -228,7 +228,7 @@ static int multiq_tune(struct Qdisc *sch
 					qdisc_tree_reduce_backlog(old,
 								  old->q.qlen,
 								  old->qstats.backlog);
-					qdisc_destroy(old);
+					qdisc_put(old);
 				}
 				sch_tree_unlock(sch);
 			}
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -1054,7 +1054,7 @@ static void netem_destroy(struct Qdisc *
 
 	qdisc_watchdog_cancel(&q->watchdog);
 	if (q->qdisc)
-		qdisc_destroy(q->qdisc);
+		qdisc_put(q->qdisc);
 	dist_free(q->delay_dist);
 	dist_free(q->slot_dist);
 }
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -175,7 +175,7 @@ prio_destroy(struct Qdisc *sch)
 	tcf_block_put(q->block);
 	prio_offload(sch, NULL);
 	for (prio = 0; prio < q->bands; prio++)
-		qdisc_destroy(q->queues[prio]);
+		qdisc_put(q->queues[prio]);
 }
 
 static int prio_tune(struct Qdisc *sch, struct nlattr *opt,
@@ -205,7 +205,7 @@ static int prio_tune(struct Qdisc *sch,
 					      extack);
 		if (!queues[i]) {
 			while (i > oldbands)
-				qdisc_destroy(queues[--i]);
+				qdisc_put(queues[--i]);
 			return -ENOMEM;
 		}
 	}
@@ -220,7 +220,7 @@ static int prio_tune(struct Qdisc *sch,
 
 		qdisc_tree_reduce_backlog(child, child->q.qlen,
 					  child->qstats.backlog);
-		qdisc_destroy(child);
+		qdisc_put(child);
 	}
 
 	for (i = oldbands; i < q->bands; i++) {
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
@@ -524,7 +524,7 @@ set_change_agg:
 	return 0;
 
 destroy_class:
-	qdisc_destroy(cl->qdisc);
+	qdisc_put(cl->qdisc);
 	kfree(cl);
 	return err;
 }
@@ -535,7 +535,7 @@ static void qfq_destroy_class(struct Qdi
 
 	qfq_rm_from_agg(q, cl);
 	gen_kill_estimator(&cl->rate_est);
-	qdisc_destroy(cl->qdisc);
+	qdisc_put(cl->qdisc);
 	kfree(cl);
 }
 
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -181,7 +181,7 @@ static void red_destroy(struct Qdisc *sc
 
 	del_timer_sync(&q->adapt_timer);
 	red_offload(sch, false);
-	qdisc_destroy(q->qdisc);
+	qdisc_put(q->qdisc);
 }
 
 static const struct nla_policy red_policy[TCA_RED_MAX + 1] = {
@@ -236,7 +236,7 @@ static int red_change(struct Qdisc *sch,
 	if (child) {
 		qdisc_tree_reduce_backlog(q->qdisc, q->qdisc->q.qlen,
 					  q->qdisc->qstats.backlog);
-		qdisc_destroy(q->qdisc);
+		qdisc_put(q->qdisc);
 		q->qdisc = child;
 	}
 
--- a/net/sched/sch_sfb.c
+++ b/net/sched/sch_sfb.c
@@ -470,7 +470,7 @@ static void sfb_destroy(struct Qdisc *sc
 	struct sfb_sched_data *q = qdisc_priv(sch);
 
 	tcf_block_put(q->block);
-	qdisc_destroy(q->qdisc);
+	qdisc_put(q->qdisc);
 }
 
 static const struct nla_policy sfb_policy[TCA_SFB_MAX + 1] = {
@@ -524,7 +524,7 @@ static int sfb_change(struct Qdisc *sch,
 
 	qdisc_tree_reduce_backlog(q->qdisc, q->qdisc->q.qlen,
 				  q->qdisc->qstats.backlog);
-	qdisc_destroy(q->qdisc);
+	qdisc_put(q->qdisc);
 	q->qdisc = child;
 
 	q->rehash_interval = msecs_to_jiffies(ctl->rehash_interval);
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -392,7 +392,7 @@ static int tbf_change(struct Qdisc *sch,
 	if (child) {
 		qdisc_tree_reduce_backlog(q->qdisc, q->qdisc->q.qlen,
 					  q->qdisc->qstats.backlog);
-		qdisc_destroy(q->qdisc);
+		qdisc_put(q->qdisc);
 		q->qdisc = child;
 	}
 	q->limit = qopt->limit;
@@ -438,7 +438,7 @@ static void tbf_destroy(struct Qdisc *sc
 	struct tbf_sched_data *q = qdisc_priv(sch);
 
 	qdisc_watchdog_cancel(&q->watchdog);
-	qdisc_destroy(q->qdisc);
+	qdisc_put(q->qdisc);
 }
 
 static int tbf_dump(struct Qdisc *sch, struct sk_buff *skb)

[PATCH 4.19 12/74] net: sched: extend Qdisc with rcu

[Greg Kroah-Hartman]

From: Vlad Buslov <vladbu@mellanox.com>

[ Upstream commit 3a7d0d07a386716b459b00783b11a8211cefcc0f ]

Currently, Qdisc API functions assume that users have rtnl lock taken. To
implement rtnl unlocked classifiers update interface, Qdisc API must be
extended with functions that do not require rtnl lock.

Extend Qdisc structure with rcu. Implement special version of put function
qdisc_put_unlocked() that is called without rtnl lock taken. This function
only takes rtnl lock if Qdisc reference counter reached zero and is
intended to be used as optimization.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[Lee: Sent to Stable]
Link: https://syzkaller.appspot.com/bug?id=d7e411c5472dd5da33d8cc921ccadc747743a568
Reported-by: syzbot+5f229e48cccc804062c0@syzkaller.appspotmail.com
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/rtnetlink.h |    5 +++++
 include/net/pkt_sched.h   |    1 +
 include/net/sch_generic.h |    2 ++
 net/sched/sch_api.c       |   18 ++++++++++++++++++
 net/sched/sch_generic.c   |   25 ++++++++++++++++++++++++-
 5 files changed, 50 insertions(+), 1 deletion(-)

--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -85,6 +85,11 @@ static inline struct netdev_queue *dev_i
 	return rtnl_dereference(dev->ingress_queue);
 }
 
+static inline struct netdev_queue *dev_ingress_queue_rcu(struct net_device *dev)
+{
+	return rcu_dereference(dev->ingress_queue);
+}
+
 struct netdev_queue *dev_ingress_queue_create(struct net_device *dev);
 
 #ifdef CONFIG_NET_INGRESS
--- a/include/net/pkt_sched.h
+++ b/include/net/pkt_sched.h
@@ -103,6 +103,7 @@ int qdisc_set_default(const char *id);
 void qdisc_hash_add(struct Qdisc *q, bool invisible);
 void qdisc_hash_del(struct Qdisc *q);
 struct Qdisc *qdisc_lookup(struct net_device *dev, u32 handle);
+struct Qdisc *qdisc_lookup_rcu(struct net_device *dev, u32 handle);
 struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r,
 					struct nlattr *tab,
 					struct netlink_ext_ack *extack);
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -108,6 +108,7 @@ struct Qdisc {
 
 	spinlock_t		busylock ____cacheline_aligned_in_smp;
 	spinlock_t		seqlock;
+	struct rcu_head		rcu;
 };
 
 static inline void qdisc_refcount_inc(struct Qdisc *qdisc)
@@ -560,6 +561,7 @@ struct Qdisc *dev_graft_qdisc(struct net
 			      struct Qdisc *qdisc);
 void qdisc_reset(struct Qdisc *qdisc);
 void qdisc_put(struct Qdisc *qdisc);
+void qdisc_put_unlocked(struct Qdisc *qdisc);
 void qdisc_tree_reduce_backlog(struct Qdisc *qdisc, unsigned int n,
 			       unsigned int len);
 struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -315,6 +315,24 @@ out:
 	return q;
 }
 
+struct Qdisc *qdisc_lookup_rcu(struct net_device *dev, u32 handle)
+{
+	struct netdev_queue *nq;
+	struct Qdisc *q;
+
+	if (!handle)
+		return NULL;
+	q = qdisc_match_from_root(dev->qdisc, handle);
+	if (q)
+		goto out;
+
+	nq = dev_ingress_queue_rcu(dev);
+	if (nq)
+		q = qdisc_match_from_root(nq->qdisc_sleeping, handle);
+out:
+	return q;
+}
+
 static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid)
 {
 	unsigned long cl;
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -958,6 +958,13 @@ void qdisc_free(struct Qdisc *qdisc)
 	kfree((char *) qdisc - qdisc->padded);
 }
 
+void qdisc_free_cb(struct rcu_head *head)
+{
+	struct Qdisc *q = container_of(head, struct Qdisc, rcu);
+
+	qdisc_free(q);
+}
+
 static void qdisc_destroy(struct Qdisc *qdisc)
 {
 	const struct Qdisc_ops *ops;
@@ -991,7 +998,7 @@ static void qdisc_destroy(struct Qdisc *
 		kfree_skb_list(skb);
 	}
 
-	qdisc_free(qdisc);
+	call_rcu(&qdisc->rcu, qdisc_free_cb);
 }
 
 void qdisc_put(struct Qdisc *qdisc)
@@ -1004,6 +1011,22 @@ void qdisc_put(struct Qdisc *qdisc)
 }
 EXPORT_SYMBOL(qdisc_put);
 
+/* Version of qdisc_put() that is called with rtnl mutex unlocked.
+ * Intended to be used as optimization, this function only takes rtnl lock if
+ * qdisc reference counter reached zero.
+ */
+
+void qdisc_put_unlocked(struct Qdisc *qdisc)
+{
+	if (qdisc->flags & TCQ_F_BUILTIN ||
+	    !refcount_dec_and_rtnl_lock(&qdisc->refcnt))
+		return;
+
+	qdisc_destroy(qdisc);
+	rtnl_unlock();
+}
+EXPORT_SYMBOL(qdisc_put_unlocked);
+
 /* Attach toplevel qdisc to device queue. */
 struct Qdisc *dev_graft_qdisc(struct netdev_queue *dev_queue,
 			      struct Qdisc *qdisc)

[PATCH 4.19 13/74] net: sched: add helper function to take reference to Qdisc

[Greg Kroah-Hartman]

From: Vlad Buslov <vladbu@mellanox.com>

[ Upstream commit 9d7e82cec35c027756ec97e274f878251f271181 ]

Implement function to take reference to Qdisc that relies on rcu read lock
instead of rtnl mutex. Function only takes reference to Qdisc if reference
counter isn't zero. Intended to be used by unlocked cls API.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[Lee: Sent to Stable]
Link: https://syzkaller.appspot.com/bug?id=d7e411c5472dd5da33d8cc921ccadc747743a568
Reported-by: syzbot+5f229e48cccc804062c0@syzkaller.appspotmail.com
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/net/sch_generic.h |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -118,6 +118,19 @@ static inline void qdisc_refcount_inc(st
 	refcount_inc(&qdisc->refcnt);
 }
 
+/* Intended to be used by unlocked users, when concurrent qdisc release is
+ * possible.
+ */
+
+static inline struct Qdisc *qdisc_refcount_inc_nz(struct Qdisc *qdisc)
+{
+	if (qdisc->flags & TCQ_F_BUILTIN)
+		return qdisc;
+	if (refcount_inc_not_zero(&qdisc->refcnt))
+		return qdisc;
+	return NULL;
+}
+
 static inline bool qdisc_is_running(struct Qdisc *qdisc)
 {
 	if (qdisc->flags & TCQ_F_NOLOCK)

[PATCH 4.19 14/74] net: sched: use Qdisc rcu API instead of relying on rtnl lock

[Greg Kroah-Hartman]

From: Vlad Buslov <vladbu@mellanox.com>

[ Upstream commit e368fdb61d8e7c67ac70791b23345b26d7bbc661 ]

As a preparation from removing rtnl lock dependency from rules update path,
use Qdisc rcu and reference counting capabilities instead of relying on
rtnl lock while working with Qdiscs. Create new tcf_block_release()
function, and use it to free resources taken by tcf_block_find().
Currently, this function only releases Qdisc and it is extended in next
patches in this series.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[Lee: Sent to Stable]
Link: https://syzkaller.appspot.com/bug?id=d7e411c5472dd5da33d8cc921ccadc747743a568
Reported-by: syzbot+5f229e48cccc804062c0@syzkaller.appspotmail.com
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/cls_api.c |   79 ++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 64 insertions(+), 15 deletions(-)

--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -539,6 +539,7 @@ static struct tcf_block *tcf_block_find(
 					struct netlink_ext_ack *extack)
 {
 	struct tcf_block *block;
+	int err = 0;
 
 	if (ifindex == TCM_IFINDEX_MAGIC_BLOCK) {
 		block = tcf_block_lookup(net, block_index);
@@ -550,55 +551,93 @@ static struct tcf_block *tcf_block_find(
 		const struct Qdisc_class_ops *cops;
 		struct net_device *dev;
 
+		rcu_read_lock();
+
 		/* Find link */
-		dev = __dev_get_by_index(net, ifindex);
-		if (!dev)
+		dev = dev_get_by_index_rcu(net, ifindex);
+		if (!dev) {
+			rcu_read_unlock();
 			return ERR_PTR(-ENODEV);
+		}
 
 		/* Find qdisc */
 		if (!*parent) {
 			*q = dev->qdisc;
 			*parent = (*q)->handle;
 		} else {
-			*q = qdisc_lookup(dev, TC_H_MAJ(*parent));
+			*q = qdisc_lookup_rcu(dev, TC_H_MAJ(*parent));
 			if (!*q) {
 				NL_SET_ERR_MSG(extack, "Parent Qdisc doesn't exists");
-				return ERR_PTR(-EINVAL);
+				err = -EINVAL;
+				goto errout_rcu;
 			}
 		}
 
+		*q = qdisc_refcount_inc_nz(*q);
+		if (!*q) {
+			NL_SET_ERR_MSG(extack, "Parent Qdisc doesn't exists");
+			err = -EINVAL;
+			goto errout_rcu;
+		}
+
 		/* Is it classful? */
 		cops = (*q)->ops->cl_ops;
 		if (!cops) {
 			NL_SET_ERR_MSG(extack, "Qdisc not classful");
-			return ERR_PTR(-EINVAL);
+			err = -EINVAL;
+			goto errout_rcu;
 		}
 
 		if (!cops->tcf_block) {
 			NL_SET_ERR_MSG(extack, "Class doesn't support blocks");
-			return ERR_PTR(-EOPNOTSUPP);
+			err = -EOPNOTSUPP;
+			goto errout_rcu;
 		}
 
+		/* At this point we know that qdisc is not noop_qdisc,
+		 * which means that qdisc holds a reference to net_device
+		 * and we hold a reference to qdisc, so it is safe to release
+		 * rcu read lock.
+		 */
+		rcu_read_unlock();
+
 		/* Do we search for filter, attached to class? */
 		if (TC_H_MIN(*parent)) {
 			*cl = cops->find(*q, *parent);
 			if (*cl == 0) {
 				NL_SET_ERR_MSG(extack, "Specified class doesn't exist");
-				return ERR_PTR(-ENOENT);
+				err = -ENOENT;
+				goto errout_qdisc;
 			}
 		}
 
 		/* And the last stroke */
 		block = cops->tcf_block(*q, *cl, extack);
-		if (!block)
-			return ERR_PTR(-EINVAL);
+		if (!block) {
+			err = -EINVAL;
+			goto errout_qdisc;
+		}
 		if (tcf_block_shared(block)) {
 			NL_SET_ERR_MSG(extack, "This filter block is shared. Please use the block index to manipulate the filters");
-			return ERR_PTR(-EOPNOTSUPP);
+			err = -EOPNOTSUPP;
+			goto errout_qdisc;
 		}
 	}
 
 	return block;
+
+errout_rcu:
+	rcu_read_unlock();
+errout_qdisc:
+	if (*q)
+		qdisc_put(*q);
+	return ERR_PTR(err);
+}
+
+static void tcf_block_release(struct Qdisc *q, struct tcf_block *block)
+{
+	if (q)
+		qdisc_put(q);
 }
 
 struct tcf_block_owner_item {
@@ -1336,6 +1375,7 @@ replay:
 errout:
 	if (chain)
 		tcf_chain_put(chain);
+	tcf_block_release(q, block);
 	if (err == -EAGAIN)
 		/* Replay the request. */
 		goto replay;
@@ -1457,6 +1497,7 @@ static int tc_del_tfilter(struct sk_buff
 errout:
 	if (chain)
 		tcf_chain_put(chain);
+	tcf_block_release(q, block);
 	return err;
 }
 
@@ -1542,6 +1583,7 @@ static int tc_get_tfilter(struct sk_buff
 errout:
 	if (chain)
 		tcf_chain_put(chain);
+	tcf_block_release(q, block);
 	return err;
 }
 
@@ -1858,7 +1900,8 @@ replay:
 	chain_index = tca[TCA_CHAIN] ? nla_get_u32(tca[TCA_CHAIN]) : 0;
 	if (chain_index > TC_ACT_EXT_VAL_MASK) {
 		NL_SET_ERR_MSG(extack, "Specified chain index exceeds upper limit");
-		return -EINVAL;
+		err = -EINVAL;
+		goto errout_block;
 	}
 	chain = tcf_chain_lookup(block, chain_index);
 	if (n->nlmsg_type == RTM_NEWCHAIN) {
@@ -1870,23 +1913,27 @@ replay:
 				tcf_chain_hold(chain);
 			} else {
 				NL_SET_ERR_MSG(extack, "Filter chain already exists");
-				return -EEXIST;
+				err = -EEXIST;
+				goto errout_block;
 			}
 		} else {
 			if (!(n->nlmsg_flags & NLM_F_CREATE)) {
 				NL_SET_ERR_MSG(extack, "Need both RTM_NEWCHAIN and NLM_F_CREATE to create a new chain");
-				return -ENOENT;
+				err = -ENOENT;
+				goto errout_block;
 			}
 			chain = tcf_chain_create(block, chain_index);
 			if (!chain) {
 				NL_SET_ERR_MSG(extack, "Failed to create filter chain");
-				return -ENOMEM;
+				err = -ENOMEM;
+				goto errout_block;
 			}
 		}
 	} else {
 		if (!chain || tcf_chain_held_by_acts_only(chain)) {
 			NL_SET_ERR_MSG(extack, "Cannot find specified filter chain");
-			return -EINVAL;
+			err = -EINVAL;
+			goto errout_block;
 		}
 		tcf_chain_hold(chain);
 	}
@@ -1930,6 +1977,8 @@ replay:
 
 errout:
 	tcf_chain_put(chain);
+errout_block:
+	tcf_block_release(q, block);
 	if (err == -EAGAIN)
 		/* Replay the request. */
 		goto replay;

[PATCH 4.19 15/74] nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done

[Greg Kroah-Hartman]

From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

commit 4cd8371a234d051f9c9557fcbb1f8c523b1c0d10 upstream.

The done() netlink callback nfc_genl_dump_ses_done() should check if
received argument is non-NULL, because its allocation could fail earlier
in dumpit() (nfc_genl_dump_ses()).

Fixes: ac22ac466a65 ("NFC: Add a GET_SE netlink API")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211209081307.57337-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/nfc/netlink.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1410,8 +1410,10 @@ static int nfc_genl_dump_ses_done(struct
 {
 	struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
 
-	nfc_device_iter_exit(iter);
-	kfree(iter);
+	if (iter) {
+		nfc_device_iter_exit(iter);
+		kfree(iter);
+	}
 
 	return 0;
 }

[PATCH 4.19 16/74] bpf: Fix the off-by-two error in range markings

[Greg Kroah-Hartman]

From: Maxim Mikityanskiy <maximmi@nvidia.com>

commit 2fa7d94afc1afbb4d702760c058dc2d7ed30f226 upstream.

The first commit cited below attempts to fix the off-by-one error that
appeared in some comparisons with an open range. Due to this error,
arithmetically equivalent pieces of code could get different verdicts
from the verifier, for example (pseudocode):

  // 1. Passes the verifier:
  if (data + 8 > data_end)
      return early
  read *(u64 *)data, i.e. [data; data+7]

  // 2. Rejected by the verifier (should still pass):
  if (data + 7 >= data_end)
      return early
  read *(u64 *)data, i.e. [data; data+7]

The attempted fix, however, shifts the range by one in a wrong
direction, so the bug not only remains, but also such piece of code
starts failing in the verifier:

  // 3. Rejected by the verifier, but the check is stricter than in #1.
  if (data + 8 >= data_end)
      return early
  read *(u64 *)data, i.e. [data; data+7]

The change performed by that fix converted an off-by-one bug into
off-by-two. The second commit cited below added the BPF selftests
written to ensure than code chunks like #3 are rejected, however,
they should be accepted.

This commit fixes the off-by-two error by adjusting new_range in the
right direction and fixes the tests by changing the range into the
one that should actually fail.

Fixes: fb2a311a31d3 ("bpf: fix off by one for range markings with L{T, E} patterns")
Fixes: b37242c773b2 ("bpf: add test cases to bpf selftests to cover all access tests")
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211130181607.593149-1-maximmi@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 kernel/bpf/verifier.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -3761,7 +3761,7 @@ static void find_good_pkt_pointers(struc
 
 	new_range = dst_reg->off;
 	if (range_right_open)
-		new_range--;
+		new_range++;
 
 	/* Examples for register markings:
 	 *

[PATCH 4.19 17/74] ice: ignore dropped packets during init

[Greg Kroah-Hartman]

From: Jesse Brandeburg <jesse.brandeburg@intel.com>

commit 28dc1b86f8ea9fd6f4c9e0b363db73ecabf84e22 upstream.

If the hardware is constantly receiving unicast or broadcast packets
during driver load, the device previously counted many GLV_RDPC (VSI
dropped packets) events during init. This causes confusing dropped
packet statistics during driver load. The dropped packets counter
incrementing does stop once the driver finishes loading.

Avoid this problem by baselining our statistics at the end of driver
open instead of the end of probe.

Fixes: cdedef59deb0 ("ice: Configure VSIs for Tx/Rx")
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/intel/ice/ice_main.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4404,6 +4404,9 @@ static int ice_up_complete(struct ice_vs
 		netif_carrier_on(vsi->netdev);
 	}
 
+	/* clear this now, and the first stats read will be used as baseline */
+	vsi->stat_offsets_loaded = false;
+
 	ice_service_task_schedule(pf);
 
 	return err;

[PATCH 4.19 18/74] bonding: make tx_rebalance_counter an atomic

[Greg Kroah-Hartman]

From: Eric Dumazet <edumazet@google.com>

commit dac8e00fb640e9569cdeefd3ce8a75639e5d0711 upstream.

KCSAN reported a data-race [1] around tx_rebalance_counter
which can be accessed from different contexts, without
the protection of a lock/mutex.

[1]
BUG: KCSAN: data-race in bond_alb_init_slave / bond_alb_monitor

write to 0xffff888157e8ca24 of 4 bytes by task 7075 on cpu 0:
 bond_alb_init_slave+0x713/0x860 drivers/net/bonding/bond_alb.c:1613
 bond_enslave+0xd94/0x3010 drivers/net/bonding/bond_main.c:1949
 do_set_master net/core/rtnetlink.c:2521 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3475 [inline]
 rtnl_newlink+0x1298/0x13b0 net/core/rtnetlink.c:3506
 rtnetlink_rcv_msg+0x745/0x7e0 net/core/rtnetlink.c:5571
 netlink_rcv_skb+0x14e/0x250 net/netlink/af_netlink.c:2491
 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:5589
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x5fc/0x6c0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x6e1/0x7d0 net/netlink/af_netlink.c:1916
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 ____sys_sendmsg+0x39a/0x510 net/socket.c:2409
 ___sys_sendmsg net/socket.c:2463 [inline]
 __sys_sendmsg+0x195/0x230 net/socket.c:2492
 __do_sys_sendmsg net/socket.c:2501 [inline]
 __se_sys_sendmsg net/socket.c:2499 [inline]
 __x64_sys_sendmsg+0x42/0x50 net/socket.c:2499
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888157e8ca24 of 4 bytes by task 1082 on cpu 1:
 bond_alb_monitor+0x8f/0xc00 drivers/net/bonding/bond_alb.c:1511
 process_one_work+0x3fc/0x980 kernel/workqueue.c:2298
 worker_thread+0x616/0xa70 kernel/workqueue.c:2445
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

value changed: 0x00000001 -> 0x00000064

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1082 Comm: kworker/u4:3 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bond1 bond_alb_monitor

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/bonding/bond_alb.c |   14 ++++++++------
 include/net/bond_alb.h         |    2 +-
 2 files changed, 9 insertions(+), 7 deletions(-)

--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -1530,14 +1530,14 @@ void bond_alb_monitor(struct work_struct
 	struct slave *slave;
 
 	if (!bond_has_slaves(bond)) {
-		bond_info->tx_rebalance_counter = 0;
+		atomic_set(&bond_info->tx_rebalance_counter, 0);
 		bond_info->lp_counter = 0;
 		goto re_arm;
 	}
 
 	rcu_read_lock();
 
-	bond_info->tx_rebalance_counter++;
+	atomic_inc(&bond_info->tx_rebalance_counter);
 	bond_info->lp_counter++;
 
 	/* send learning packets */
@@ -1559,7 +1559,7 @@ void bond_alb_monitor(struct work_struct
 	}
 
 	/* rebalance tx traffic */
-	if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) {
+	if (atomic_read(&bond_info->tx_rebalance_counter) >= BOND_TLB_REBALANCE_TICKS) {
 		bond_for_each_slave_rcu(bond, slave, iter) {
 			tlb_clear_slave(bond, slave, 1);
 			if (slave == rcu_access_pointer(bond->curr_active_slave)) {
@@ -1569,7 +1569,7 @@ void bond_alb_monitor(struct work_struct
 				bond_info->unbalanced_load = 0;
 			}
 		}
-		bond_info->tx_rebalance_counter = 0;
+		atomic_set(&bond_info->tx_rebalance_counter, 0);
 	}
 
 	if (bond_info->rlb_enabled) {
@@ -1639,7 +1639,8 @@ int bond_alb_init_slave(struct bonding *
 	tlb_init_slave(slave);
 
 	/* order a rebalance ASAP */
-	bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
+	atomic_set(&bond->alb_info.tx_rebalance_counter,
+		   BOND_TLB_REBALANCE_TICKS);
 
 	if (bond->alb_info.rlb_enabled)
 		bond->alb_info.rlb_rebalance = 1;
@@ -1676,7 +1677,8 @@ void bond_alb_handle_link_change(struct
 			rlb_clear_slave(bond, slave);
 	} else if (link == BOND_LINK_UP) {
 		/* order a rebalance ASAP */
-		bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS;
+		atomic_set(&bond_info->tx_rebalance_counter,
+			   BOND_TLB_REBALANCE_TICKS);
 		if (bond->alb_info.rlb_enabled) {
 			bond->alb_info.rlb_rebalance = 1;
 			/* If the updelay module parameter is smaller than the
--- a/include/net/bond_alb.h
+++ b/include/net/bond_alb.h
@@ -142,7 +142,7 @@ struct tlb_slave_info {
 struct alb_bond_info {
 	struct tlb_client_info	*tx_hashtbl; /* Dynamically allocated */
 	u32			unbalanced_load;
-	int			tx_rebalance_counter;
+	atomic_t		tx_rebalance_counter;
 	int			lp_counter;
 	/* -------- rlb parameters -------- */
 	int rlb_enabled;

[PATCH 4.19 19/74] nfp: Fix memory leak in nfp_cpp_area_cache_add()

[Greg Kroah-Hartman]

From: Jianglei Nie <niejianglei2021@163.com>

commit c56c96303e9289cc34716b1179597b6f470833de upstream.

In line 800 (#1), nfp_cpp_area_alloc() allocates and initializes a
CPP area structure. But in line 807 (#2), when the cache is allocated
failed, this CPP area structure is not freed, which will result in
memory leak.

We can fix it by freeing the CPP area when the cache is allocated
failed (#2).

792 int nfp_cpp_area_cache_add(struct nfp_cpp *cpp, size_t size)
793 {
794 	struct nfp_cpp_area_cache *cache;
795 	struct nfp_cpp_area *area;

800	area = nfp_cpp_area_alloc(cpp, NFP_CPP_ID(7, NFP_CPP_ACTION_RW, 0),
801 				  0, size);
	// #1: allocates and initializes

802 	if (!area)
803 		return -ENOMEM;

805 	cache = kzalloc(sizeof(*cache), GFP_KERNEL);
806 	if (!cache)
807 		return -ENOMEM; // #2: missing free

817	return 0;
818 }

Fixes: 4cb584e0ee7d ("nfp: add CPP access core")
Signed-off-by: Jianglei Nie <niejianglei2021@163.com>
Acked-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20211209061511.122535-1-niejianglei2021@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
@@ -803,8 +803,10 @@ int nfp_cpp_area_cache_add(struct nfp_cp
 		return -ENOMEM;
 
 	cache = kzalloc(sizeof(*cache), GFP_KERNEL);
-	if (!cache)
+	if (!cache) {
+		nfp_cpp_area_free(area);
 		return -ENOMEM;
+	}
 
 	cache->id = 0;
 	cache->addr = 0;

[PATCH 4.19 20/74] seg6: fix the iif in the IPv6 socket control block

[Greg Kroah-Hartman]

From: Andrea Mayer <andrea.mayer@uniroma2.it>

commit ae68d93354e5bf5191ee673982251864ea24dd5c upstream.

When an IPv4 packet is received, the ip_rcv_core(...) sets the receiving
interface index into the IPv4 socket control block (v5.16-rc4,
net/ipv4/ip_input.c line 510):

    IPCB(skb)->iif = skb->skb_iif;

If that IPv4 packet is meant to be encapsulated in an outer IPv6+SRH
header, the seg6_do_srh_encap(...) performs the required encapsulation.
In this case, the seg6_do_srh_encap function clears the IPv6 socket control
block (v5.16-rc4 net/ipv6/seg6_iptunnel.c line 163):

    memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));

The memset(...) was introduced in commit ef489749aae5 ("ipv6: sr: clear
IP6CB(skb) on SRH ip4ip6 encapsulation") a long time ago (2019-01-29).

Since the IPv6 socket control block and the IPv4 socket control block share
the same memory area (skb->cb), the receiving interface index info is lost
(IP6CB(skb)->iif is set to zero).

As a side effect, that condition triggers a NULL pointer dereference if
commit 0857d6f8c759 ("ipv6: When forwarding count rx stats on the orig
netdev") is applied.

To fix that issue, we set the IP6CB(skb)->iif with the index of the
receiving interface once again.

Fixes: ef489749aae5 ("ipv6: sr: clear IP6CB(skb) on SRH ip4ip6 encapsulation")
Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20211208195409.12169-1-andrea.mayer@uniroma2.it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv6/seg6_iptunnel.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/net/ipv6/seg6_iptunnel.c
+++ b/net/ipv6/seg6_iptunnel.c
@@ -148,6 +148,14 @@ int seg6_do_srh_encap(struct sk_buff *sk
 		hdr->hop_limit = ip6_dst_hoplimit(skb_dst(skb));
 
 		memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
+
+		/* the control block has been erased, so we have to set the
+		 * iif once again.
+		 * We read the receiving interface index directly from the
+		 * skb->skb_iif as it is done in the IPv4 receiving path (i.e.:
+		 * ip_rcv_core(...)).
+		 */
+		IP6CB(skb)->iif = skb->skb_iif;
 	}
 
 	hdr->nexthdr = NEXTHDR_ROUTING;

[PATCH 4.19 21/74] udp: using datalen to cap max gso segments

[Greg Kroah-Hartman]

From: Jianguo Wu <wujianguo@chinatelecom.cn>

commit 158390e45612ef0fde160af0826f1740c36daf21 upstream.

The max number of UDP gso segments is intended to cap to UDP_MAX_SEGMENTS,
this is checked in udp_send_skb():

    if (skb->len > cork->gso_size * UDP_MAX_SEGMENTS) {
        kfree_skb(skb);
        return -EINVAL;
    }

skb->len contains network and transport header len here, we should use
only data len instead.

Fixes: bec1f6f69736 ("udp: generate gso with UDP_SEGMENT")
Signed-off-by: Jianguo Wu <wujianguo@chinatelecom.cn>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/900742e5-81fb-30dc-6e0b-375c6cdd7982@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/udp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -798,7 +798,7 @@ static int udp_send_skb(struct sk_buff *
 			kfree_skb(skb);
 			return -EINVAL;
 		}
-		if (skb->len > cork->gso_size * UDP_MAX_SEGMENTS) {
+		if (datalen > cork->gso_size * UDP_MAX_SEGMENTS) {
 			kfree_skb(skb);
 			return -EINVAL;
 		}

[PATCH 4.19 22/74] IB/hfi1: Correct guard on eager buffer deallocation

[Greg Kroah-Hartman]

From: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>

commit 9292f8f9a2ac42eb320bced7153aa2e63d8cc13a upstream.

The code tests the dma address which legitimately can be 0.

The code should test the kernel logical address to avoid leaking eager
buffer allocations that happen to map to a dma address of 0.

Fixes: 60368186fd85 ("IB/hfi1: Fix user-space buffers mapping with IOMMU enabled")
Link: https://lore.kernel.org/r/20211129191952.101968.17137.stgit@awfm-01.cornelisnetworks.com
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@cornelisnetworks.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/infiniband/hw/hfi1/init.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -1146,7 +1146,7 @@ void hfi1_free_ctxtdata(struct hfi1_devd
 	rcd->egrbufs.rcvtids = NULL;
 
 	for (e = 0; e < rcd->egrbufs.alloced; e++) {
-		if (rcd->egrbufs.buffers[e].dma)
+		if (rcd->egrbufs.buffers[e].addr)
 			dma_free_coherent(&dd->pcidev->dev,
 					  rcd->egrbufs.buffers[e].len,
 					  rcd->egrbufs.buffers[e].addr,

[PATCH 4.19 23/74] mm: bdi: initialize bdi_min_ratio when bdi is unregistered

[Greg Kroah-Hartman]

From: Manjong Lee <mj0123.lee@samsung.com>

commit 3c376dfafbf7a8ea0dea212d095ddd83e93280bb upstream.

Initialize min_ratio if it is set during bdi unregistration.  This can
prevent problems that may occur a when bdi is removed without resetting
min_ratio.

For example.
1) insert external sdcard
2) set external sdcard's min_ratio 70
3) remove external sdcard without setting min_ratio 0
4) insert external sdcard
5) set external sdcard's min_ratio 70 << error occur(can't set)

Because when an sdcard is removed, the present bdi_min_ratio value will
remain.  Currently, the only way to reset bdi_min_ratio is to reboot.

[akpm@linux-foundation.org: tweak comment and coding style]

Link: https://lkml.kernel.org/r/20211021161942.5983-1-mj0123.lee@samsung.com
Signed-off-by: Manjong Lee <mj0123.lee@samsung.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Changheun Lee <nanich.lee@samsung.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <seunghwan.hyun@samsung.com>
Cc: <sookwan7.kim@samsung.com>
Cc: <yt0928.kim@samsung.com>
Cc: <junho89.kim@samsung.com>
Cc: <jisoo2146.oh@samsung.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 mm/backing-dev.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -946,6 +946,13 @@ void bdi_unregister(struct backing_dev_i
 	wb_shutdown(&bdi->wb);
 	cgwb_bdi_unregister(bdi);
 
+	/*
+	 * If this BDI's min ratio has been set, use bdi_set_min_ratio() to
+	 * update the global bdi_min_ratio.
+	 */
+	if (bdi->min_ratio)
+		bdi_set_min_ratio(bdi, 0);
+
 	if (bdi->dev) {
 		bdi_debug_unregister(bdi);
 		device_unregister(bdi->dev);

[PATCH 4.19 24/74] ALSA: ctl: Fix copy of updated id with element read/write

[Greg Kroah-Hartman]

From: Alan Young <consult.awy@gmail.com>

commit b6409dd6bdc03aa178bbff0d80db2a30d29b63ac upstream.

When control_compat.c:copy_ctl_value_to_user() is used, by
ctl_elem_read_user() & ctl_elem_write_user(), it must also copy back the
snd_ctl_elem_id value that may have been updated (filled in) by the call
to snd_ctl_elem_read/snd_ctl_elem_write().

This matches the functionality provided by snd_ctl_elem_read_user() and
snd_ctl_elem_write_user(), via snd_ctl_build_ioff().

Without this, and without making additional calls to snd_ctl_info()
which are unnecessary when using the non-compat calls, a userspace
application will not know the numid value for the element and
consequently will not be able to use the poll/read interface on the
control file to determine which elements have updates.

Signed-off-by: Alan Young <consult.awy@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211202150607.543389-1-consult.awy@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/core/control_compat.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/sound/core/control_compat.c
+++ b/sound/core/control_compat.c
@@ -279,6 +279,7 @@ static int copy_ctl_value_to_user(void _
 				  struct snd_ctl_elem_value *data,
 				  int type, int count)
 {
+	struct snd_ctl_elem_value32 __user *data32 = userdata;
 	int i, size;
 
 	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
@@ -295,6 +296,8 @@ static int copy_ctl_value_to_user(void _
 		if (copy_to_user(valuep, data->value.bytes.data, size))
 			return -EFAULT;
 	}
+	if (copy_to_user(&data32->id, &data->id, sizeof(data32->id)))
+		return -EFAULT;
 	return 0;
 }
 

[PATCH 4.19 25/74] ALSA: pcm: oss: Fix negative period/buffer sizes

[Greg Kroah-Hartman]

From: Takashi Iwai <tiwai@suse.de>

commit 9d2479c960875ca1239bcb899f386970c13d9cfe upstream.

The period size calculation in OSS layer may receive a negative value
as an error, but the code there assumes only the positive values and
handle them with size_t.  Due to that, a too big value may be passed
to the lower layers.

This patch changes the code to handle with ssize_t and adds the proper
error checks appropriately.

Reported-by: syzbot+bb348e9f9a954d42746f@syzkaller.appspotmail.com
Reported-by: Bixuan Cui <cuibixuan@linux.alibaba.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1638270978-42412-1-git-send-email-cuibixuan@linux.alibaba.com
Link: https://lore.kernel.org/r/20211201073606.11660-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/core/oss/pcm_oss.c |   24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -162,7 +162,7 @@ snd_pcm_hw_param_value_min(const struct
  *
  * Return the maximum value for field PAR.
  */
-static unsigned int
+static int
 snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
 			   snd_pcm_hw_param_t var, int *dir)
 {
@@ -697,18 +697,24 @@ static int snd_pcm_oss_period_size(struc
 				   struct snd_pcm_hw_params *oss_params,
 				   struct snd_pcm_hw_params *slave_params)
 {
-	size_t s;
-	size_t oss_buffer_size, oss_period_size, oss_periods;
-	size_t min_period_size, max_period_size;
+	ssize_t s;
+	ssize_t oss_buffer_size;
+	ssize_t oss_period_size, oss_periods;
+	ssize_t min_period_size, max_period_size;
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	size_t oss_frame_size;
 
 	oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 			 params_channels(oss_params) / 8;
 
+	oss_buffer_size = snd_pcm_hw_param_value_max(slave_params,
+						     SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+						     NULL);
+	if (oss_buffer_size <= 0)
+		return -EINVAL;
 	oss_buffer_size = snd_pcm_plug_client_size(substream,
-						   snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
-	if (!oss_buffer_size)
+						   oss_buffer_size * oss_frame_size);
+	if (oss_buffer_size <= 0)
 		return -EINVAL;
 	oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
 	if (atomic_read(&substream->mmap_count)) {
@@ -745,7 +751,7 @@ static int snd_pcm_oss_period_size(struc
 
 	min_period_size = snd_pcm_plug_client_size(substream,
 						   snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
-	if (min_period_size) {
+	if (min_period_size > 0) {
 		min_period_size *= oss_frame_size;
 		min_period_size = roundup_pow_of_two(min_period_size);
 		if (oss_period_size < min_period_size)
@@ -754,7 +760,7 @@ static int snd_pcm_oss_period_size(struc
 
 	max_period_size = snd_pcm_plug_client_size(substream,
 						   snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
-	if (max_period_size) {
+	if (max_period_size > 0) {
 		max_period_size *= oss_frame_size;
 		max_period_size = rounddown_pow_of_two(max_period_size);
 		if (oss_period_size > max_period_size)
@@ -767,7 +773,7 @@ static int snd_pcm_oss_period_size(struc
 		oss_periods = substream->oss.setup.periods;
 
 	s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
-	if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
+	if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 		s = runtime->oss.maxfrags;
 	if (oss_periods > s)
 		oss_periods = s;

[PATCH 4.19 26/74] ALSA: pcm: oss: Limit the period size to 16MB

[Greg Kroah-Hartman]

From: Takashi Iwai <tiwai@suse.de>

commit 8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2 upstream.

Set the practical limit to the period size (the fragment shift in OSS)
instead of a full 31bit; a too large value could lead to the exhaust
of memory as we allocate temporary buffers of the period size, too.

As of this patch, we set to 16MB limit, which should cover all use
cases.

Reported-by: syzbot+bb348e9f9a954d42746f@syzkaller.appspotmail.com
Reported-by: Bixuan Cui <cuibixuan@linux.alibaba.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1638270978-42412-1-git-send-email-cuibixuan@linux.alibaba.com
Link: https://lore.kernel.org/r/20211201073606.11660-3-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/core/oss/pcm_oss.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1967,7 +1967,7 @@ static int snd_pcm_oss_set_fragment1(str
 	if (runtime->oss.subdivision || runtime->oss.fragshift)
 		return -EINVAL;
 	fragshift = val & 0xffff;
-	if (fragshift >= 31)
+	if (fragshift >= 25) /* should be large enough */
 		return -EINVAL;
 	runtime->oss.fragshift = fragshift;
 	runtime->oss.maxfrags = (val >> 16) & 0xffff;

[PATCH 4.19 27/74] ALSA: pcm: oss: Handle missing errors in snd_pcm_oss_change_params*()

[Greg Kroah-Hartman]

From: Takashi Iwai <tiwai@suse.de>

commit 6665bb30a6b1a4a853d52557c05482ee50e71391 upstream.

A couple of calls in snd_pcm_oss_change_params_locked() ignore the
possible errors.  Catch those errors and abort the operation for
avoiding further problems.

Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211201073606.11660-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/core/oss/pcm_oss.c |   11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -899,8 +899,15 @@ static int snd_pcm_oss_change_params_loc
 		err = -EINVAL;
 		goto failure;
 	}
-	choose_rate(substream, sparams, runtime->oss.rate);
-	snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
+
+	err = choose_rate(substream, sparams, runtime->oss.rate);
+	if (err < 0)
+		goto failure;
+	err = snd_pcm_hw_param_near(substream, sparams,
+				    SNDRV_PCM_HW_PARAM_CHANNELS,
+				    runtime->oss.channels, NULL);
+	if (err < 0)
+		goto failure;
 
 	format = snd_pcm_oss_format_from(runtime->oss.format);
 

[PATCH 4.19 28/74] tracefs: Have new files inherit the ownership of their parent

[Greg Kroah-Hartman]

From: Steven Rostedt (VMware) <rostedt@goodmis.org>

commit ee7f3666995d8537dec17b1d35425f28877671a9 upstream.

If directories in tracefs have their ownership changed, then any new files
and directories that are created under those directories should inherit
the ownership of the director they are created in.

Link: https://lkml.kernel.org/r/20211208075720.4855d180@gandalf.local.home

Cc: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Yabin Cui <yabinc@google.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: stable@vger.kernel.org
Fixes: 4282d60689d4f ("tracefs: Add new tracefs file system")
Reported-by: Kalesh Singh <kaleshsingh@google.com>
Reported: https://lore.kernel.org/all/CAC_TJve8MMAv+H_NdLSJXZUSoxOEq2zB_pVaJ9p=7H6Bu3X76g@mail.gmail.com/
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/tracefs/inode.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -409,6 +409,8 @@ struct dentry *tracefs_create_file(const
 	inode->i_mode = mode;
 	inode->i_fop = fops ? fops : &tracefs_file_operations;
 	inode->i_private = data;
+	inode->i_uid = d_inode(dentry->d_parent)->i_uid;
+	inode->i_gid = d_inode(dentry->d_parent)->i_gid;
 	d_instantiate(dentry, inode);
 	fsnotify_create(dentry->d_parent->d_inode, dentry);
 	return end_creating(dentry);
@@ -431,6 +433,8 @@ static struct dentry *__create_dir(const
 	inode->i_mode = S_IFDIR | S_IRWXU | S_IRUSR| S_IRGRP | S_IXUSR | S_IXGRP;
 	inode->i_op = ops;
 	inode->i_fop = &simple_dir_operations;
+	inode->i_uid = d_inode(dentry->d_parent)->i_uid;
+	inode->i_gid = d_inode(dentry->d_parent)->i_gid;
 
 	/* directory inodes start off with i_nlink == 2 (for "." entry) */
 	inc_nlink(inode);

[PATCH 4.19 29/74] clk: qcom: regmap-mux: fix parent clock lookup

[Greg Kroah-Hartman]

From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

commit 9a61f813fcc8d56d85fcf9ca6119cf2b5ac91dd5 upstream.

The function mux_get_parent() uses qcom_find_src_index() to find the
parent clock index, which is incorrect: qcom_find_src_index() uses src
enum for the lookup, while mux_get_parent() should use cfg field (which
corresponds to the register value). Add qcom_find_cfg_index() function
doing this kind of lookup and use it for mux parent lookup.

Fixes: df964016490b ("clk: qcom: add parent map for regmap mux")
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211115233407.1046179-1-dmitry.baryshkov@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/clk/qcom/clk-regmap-mux.c |    2 +-
 drivers/clk/qcom/common.c         |   12 ++++++++++++
 drivers/clk/qcom/common.h         |    2 ++
 3 files changed, 15 insertions(+), 1 deletion(-)

--- a/drivers/clk/qcom/clk-regmap-mux.c
+++ b/drivers/clk/qcom/clk-regmap-mux.c
@@ -36,7 +36,7 @@ static u8 mux_get_parent(struct clk_hw *
 	val &= mask;
 
 	if (mux->parent_map)
-		return qcom_find_src_index(hw, mux->parent_map, val);
+		return qcom_find_cfg_index(hw, mux->parent_map, val);
 
 	return val;
 }
--- a/drivers/clk/qcom/common.c
+++ b/drivers/clk/qcom/common.c
@@ -69,6 +69,18 @@ int qcom_find_src_index(struct clk_hw *h
 }
 EXPORT_SYMBOL_GPL(qcom_find_src_index);
 
+int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map, u8 cfg)
+{
+	int i, num_parents = clk_hw_get_num_parents(hw);
+
+	for (i = 0; i < num_parents; i++)
+		if (cfg == map[i].cfg)
+			return i;
+
+	return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(qcom_find_cfg_index);
+
 struct regmap *
 qcom_cc_map(struct platform_device *pdev, const struct qcom_cc_desc *desc)
 {
--- a/drivers/clk/qcom/common.h
+++ b/drivers/clk/qcom/common.h
@@ -47,6 +47,8 @@ extern void
 qcom_pll_set_fsm_mode(struct regmap *m, u32 reg, u8 bias_count, u8 lock_count);
 extern int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map,
 			       u8 src);
+extern int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map,
+			       u8 cfg);
 
 extern int qcom_cc_register_board_clk(struct device *dev, const char *path,
 				      const char *name, unsigned long rate);

[PATCH 4.19 30/74] can: pch_can: pch_can_rx_normal: fix use after free

[Greg Kroah-Hartman]

From: Vincent Mailhol <mailhol.vincent@wanadoo.fr>

commit 94cddf1e9227a171b27292509d59691819c458db upstream.

After calling netif_receive_skb(skb), dereferencing skb is unsafe.
Especially, the can_frame cf which aliases skb memory is dereferenced
just after the call netif_receive_skb(skb).

Reordering the lines solves the issue.

Fixes: b21d18b51b31 ("can: Topcliff: Add PCH_CAN driver.")
Link: https://lore.kernel.org/all/20211123111654.621610-1-mailhol.vincent@wanadoo.fr
Cc: stable@vger.kernel.org
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/can/pch_can.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/can/pch_can.c
+++ b/drivers/net/can/pch_can.c
@@ -703,11 +703,11 @@ static int pch_can_rx_normal(struct net_
 			cf->data[i + 1] = data_reg >> 8;
 		}
 
-		netif_receive_skb(skb);
 		rcv_pkts++;
 		stats->rx_packets++;
 		quota--;
 		stats->rx_bytes += cf->can_dlc;
+		netif_receive_skb(skb);
 
 		pch_fifo_thresh(priv, obj_num);
 		obj_num++;

[PATCH 4.19 31/74] can: m_can: Disable and ignore ELO interrupt

[Greg Kroah-Hartman]

From: Brian Silverman <brian.silverman@bluerivertech.com>

commit f58ac1adc76b5beda43c64ef359056077df4d93a upstream.

With the design of this driver, this condition is often triggered.
However, the counter that this interrupt indicates an overflow is never
read either, so overflowing is harmless.

On my system, when a CAN bus starts flapping up and down, this locks up
the whole system with lots of interrupts and printks.

Specifically, this interrupt indicates the CEL field of ECR has
overflowed. All reads of ECR mask out CEL.

Fixes: e0d1f4816f2a ("can: m_can: add Bosch M_CAN controller support")
Link: https://lore.kernel.org/all/20211129222628.7490-1-brian.silverman@bluerivertech.com
Cc: stable@vger.kernel.org
Signed-off-by: Brian Silverman <brian.silverman@bluerivertech.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/can/m_can/m_can.c |   14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -233,15 +233,15 @@ enum m_can_mram_cfg {
 
 /* Interrupts for version 3.0.x */
 #define IR_ERR_LEC_30X	(IR_STE	| IR_FOE | IR_ACKE | IR_BE | IR_CRCE)
-#define IR_ERR_BUS_30X	(IR_ERR_LEC_30X | IR_WDI | IR_ELO | IR_BEU | \
-			 IR_BEC | IR_TOO | IR_MRAF | IR_TSW | IR_TEFL | \
-			 IR_RF1L | IR_RF0L)
+#define IR_ERR_BUS_30X	(IR_ERR_LEC_30X | IR_WDI | IR_BEU | IR_BEC | \
+			 IR_TOO | IR_MRAF | IR_TSW | IR_TEFL | IR_RF1L | \
+			 IR_RF0L)
 #define IR_ERR_ALL_30X	(IR_ERR_STATE | IR_ERR_BUS_30X)
 /* Interrupts for version >= 3.1.x */
 #define IR_ERR_LEC_31X	(IR_PED | IR_PEA)
-#define IR_ERR_BUS_31X      (IR_ERR_LEC_31X | IR_WDI | IR_ELO | IR_BEU | \
-			 IR_BEC | IR_TOO | IR_MRAF | IR_TSW | IR_TEFL | \
-			 IR_RF1L | IR_RF0L)
+#define IR_ERR_BUS_31X      (IR_ERR_LEC_31X | IR_WDI | IR_BEU | IR_BEC | \
+			 IR_TOO | IR_MRAF | IR_TSW | IR_TEFL | IR_RF1L | \
+			 IR_RF0L)
 #define IR_ERR_ALL_31X	(IR_ERR_STATE | IR_ERR_BUS_31X)
 
 /* Interrupt Line Select (ILS) */
@@ -769,8 +769,6 @@ static void m_can_handle_other_err(struc
 {
 	if (irqstatus & IR_WDI)
 		netdev_err(dev, "Message RAM Watchdog event due to missing READY\n");
-	if (irqstatus & IR_ELO)
-		netdev_err(dev, "Error Logging Overflow\n");
 	if (irqstatus & IR_BEU)
 		netdev_err(dev, "Bit Error Uncorrected\n");
 	if (irqstatus & IR_BEC)

[PATCH 4.19 32/74] x86/sme: Explicitly map new EFI memmap table as encrypted

[Greg Kroah-Hartman]

From: Tom Lendacky <thomas.lendacky@amd.com>

commit 1ff2fc02862d52e18fd3daabcfe840ec27e920a8 upstream.

Reserving memory using efi_mem_reserve() calls into the x86
efi_arch_mem_reserve() function. This function will insert a new EFI
memory descriptor into the EFI memory map representing the area of
memory to be reserved and marking it as EFI runtime memory. As part
of adding this new entry, a new EFI memory map is allocated and mapped.
The mapping is where a problem can occur. This new memory map is mapped
using early_memremap() and generally mapped encrypted, unless the new
memory for the mapping happens to come from an area of memory that is
marked as EFI_BOOT_SERVICES_DATA memory. In this case, the new memory will
be mapped unencrypted. However, during replacement of the old memory map,
efi_mem_type() is disabled, so the new memory map will now be long-term
mapped encrypted (in efi.memmap), resulting in the map containing invalid
data and causing the kernel boot to crash.

Since it is known that the area will be mapped encrypted going forward,
explicitly map the new memory map as encrypted using early_memremap_prot().

Cc: <stable@vger.kernel.org> # 4.14.x
Fixes: 8f716c9b5feb ("x86/mm: Add support to access boot related data in the clear")
Link: https://lore.kernel.org/all/ebf1eb2940405438a09d51d121ec0d02c8755558.1634752931.git.thomas.lendacky@amd.com/
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
[ardb: incorporate Kconfig fix by Arnd]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/x86/Kconfig               |    1 +
 arch/x86/platform/efi/quirks.c |    3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1953,6 +1953,7 @@ config EFI
 	depends on ACPI
 	select UCS2_STRING
 	select EFI_RUNTIME_WRAPPERS
+	select ARCH_USE_MEMREMAP_PROT
 	---help---
 	  This enables the kernel to use EFI runtime services that are
 	  available (such as the EFI variable services).
--- a/arch/x86/platform/efi/quirks.c
+++ b/arch/x86/platform/efi/quirks.c
@@ -278,7 +278,8 @@ void __init efi_arch_mem_reserve(phys_ad
 		return;
 	}
 
-	new = early_memremap(new_phys, new_size);
+	new = early_memremap_prot(new_phys, new_size,
+				  pgprot_val(pgprot_encrypted(FIXMAP_PAGE_NORMAL)));
 	if (!new) {
 		pr_err("Failed to map new boot services memmap\n");
 		return;

[PATCH 4.19 33/74] libata: add horkage for ASMedia 1092

[Greg Kroah-Hartman]

From: Hannes Reinecke <hare@suse.de>

commit a66307d473077b7aeba74e9b09c841ab3d399c2d upstream.

The ASMedia 1092 has a configuration mode which will present a
dummy device; sadly the implementation falsely claims to provide
a device with 100M which doesn't actually exist.
So disable this device to avoid errors during boot.

Cc: stable@vger.kernel.org
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/ata/libata-core.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4453,6 +4453,8 @@ static const struct ata_blacklist_entry
 	{ "VRFDFC22048UCHC-TE*", NULL,		ATA_HORKAGE_NODMA },
 	/* Odd clown on sil3726/4726 PMPs */
 	{ "Config  Disk",	NULL,		ATA_HORKAGE_DISABLE },
+	/* Similar story with ASMedia 1092 */
+	{ "ASMT109x- Config",	NULL,		ATA_HORKAGE_DISABLE },
 
 	/* Weird ATAPI devices */
 	{ "TORiSAN DVD-ROM DRD-N216", NULL,	ATA_HORKAGE_MAX_SEC_128 },

[PATCH 4.19 34/74] wait: add wake_up_pollfree()

[Greg Kroah-Hartman]

From: Eric Biggers <ebiggers@google.com>

commit 42288cb44c4b5fff7653bc392b583a2b8bd6a8c0 upstream.

Several ->poll() implementations are special in that they use a
waitqueue whose lifetime is the current task, rather than the struct
file as is normally the case.  This is okay for blocking polls, since a
blocking poll occurs within one task; however, non-blocking polls
require another solution.  This solution is for the queue to be cleared
before it is freed, using 'wake_up_poll(wq, EPOLLHUP | POLLFREE);'.

However, that has a bug: wake_up_poll() calls __wake_up() with
nr_exclusive=1.  Therefore, if there are multiple "exclusive" waiters,
and the wakeup function for the first one returns a positive value, only
that one will be called.  That's *not* what's needed for POLLFREE;
POLLFREE is special in that it really needs to wake up everyone.

Considering the three non-blocking poll systems:

- io_uring poll doesn't handle POLLFREE at all, so it is broken anyway.

- aio poll is unaffected, since it doesn't support exclusive waits.
  However, that's fragile, as someone could add this feature later.

- epoll doesn't appear to be broken by this, since its wakeup function
  returns 0 when it sees POLLFREE.  But this is fragile.

Although there is a workaround (see epoll), it's better to define a
function which always sends POLLFREE to all waiters.  Add such a
function.  Also make it verify that the queue really becomes empty after
all waiters have been woken up.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211209010455.42744-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/wait.h |   26 ++++++++++++++++++++++++++
 kernel/sched/wait.c  |    7 +++++++
 2 files changed, 33 insertions(+)

--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -191,6 +191,7 @@ void __wake_up_locked_key_bookmark(struc
 void __wake_up_sync_key(struct wait_queue_head *wq_head, unsigned int mode, int nr, void *key);
 void __wake_up_locked(struct wait_queue_head *wq_head, unsigned int mode, int nr);
 void __wake_up_sync(struct wait_queue_head *wq_head, unsigned int mode, int nr);
+void __wake_up_pollfree(struct wait_queue_head *wq_head);
 
 #define wake_up(x)			__wake_up(x, TASK_NORMAL, 1, NULL)
 #define wake_up_nr(x, nr)		__wake_up(x, TASK_NORMAL, nr, NULL)
@@ -217,6 +218,31 @@ void __wake_up_sync(struct wait_queue_he
 #define wake_up_interruptible_sync_poll(x, m)					\
 	__wake_up_sync_key((x), TASK_INTERRUPTIBLE, 1, poll_to_key(m))
 
+/**
+ * wake_up_pollfree - signal that a polled waitqueue is going away
+ * @wq_head: the wait queue head
+ *
+ * In the very rare cases where a ->poll() implementation uses a waitqueue whose
+ * lifetime is tied to a task rather than to the 'struct file' being polled,
+ * this function must be called before the waitqueue is freed so that
+ * non-blocking polls (e.g. epoll) are notified that the queue is going away.
+ *
+ * The caller must also RCU-delay the freeing of the wait_queue_head, e.g. via
+ * an explicit synchronize_rcu() or call_rcu(), or via SLAB_TYPESAFE_BY_RCU.
+ */
+static inline void wake_up_pollfree(struct wait_queue_head *wq_head)
+{
+	/*
+	 * For performance reasons, we don't always take the queue lock here.
+	 * Therefore, we might race with someone removing the last entry from
+	 * the queue, and proceed while they still hold the queue lock.
+	 * However, rcu_read_lock() is required to be held in such cases, so we
+	 * can safely proceed with an RCU-delayed free.
+	 */
+	if (waitqueue_active(wq_head))
+		__wake_up_pollfree(wq_head);
+}
+
 #define ___wait_cond_timeout(condition)						\
 ({										\
 	bool __cond = (condition);						\
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -209,6 +209,13 @@ void __wake_up_sync(struct wait_queue_he
 }
 EXPORT_SYMBOL_GPL(__wake_up_sync);	/* For internal use only */
 
+void __wake_up_pollfree(struct wait_queue_head *wq_head)
+{
+	__wake_up(wq_head, TASK_NORMAL, 0, poll_to_key(EPOLLHUP | POLLFREE));
+	/* POLLFREE must have cleared the queue. */
+	WARN_ON_ONCE(waitqueue_active(wq_head));
+}
+
 /*
  * Note: we use "set_current_state()" _after_ the wait-queue add,
  * because we need a memory barrier there on SMP, so that any

[PATCH 4.19 35/74] binder: use wake_up_pollfree()

[Greg Kroah-Hartman]

From: Eric Biggers <ebiggers@google.com>

commit a880b28a71e39013e357fd3adccd1d8a31bc69a8 upstream.

wake_up_poll() uses nr_exclusive=1, so it's not guaranteed to wake up
all exclusive waiters.  Yet, POLLFREE *must* wake up all waiters.  epoll
and aio poll are fortunately not affected by this, but it's very
fragile.  Thus, the new function wake_up_pollfree() has been introduced.

Convert binder to use wake_up_pollfree().

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: f5cb779ba163 ("ANDROID: binder: remove waitqueue when thread exits.")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211209010455.42744-3-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/android/binder.c |   21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -4416,23 +4416,20 @@ static int binder_thread_release(struct
 	}
 
 	/*
-	 * If this thread used poll, make sure we remove the waitqueue
-	 * from any epoll data structures holding it with POLLFREE.
-	 * waitqueue_active() is safe to use here because we're holding
-	 * the inner lock.
+	 * If this thread used poll, make sure we remove the waitqueue from any
+	 * poll data structures holding it.
 	 */
-	if ((thread->looper & BINDER_LOOPER_STATE_POLL) &&
-	    waitqueue_active(&thread->wait)) {
-		wake_up_poll(&thread->wait, EPOLLHUP | POLLFREE);
-	}
+	if (thread->looper & BINDER_LOOPER_STATE_POLL)
+		wake_up_pollfree(&thread->wait);
 
 	binder_inner_proc_unlock(thread->proc);
 
 	/*
-	 * This is needed to avoid races between wake_up_poll() above and
-	 * and ep_remove_waitqueue() called for other reasons (eg the epoll file
-	 * descriptor being closed); ep_remove_waitqueue() holds an RCU read
-	 * lock, so we can be sure it's done after calling synchronize_rcu().
+	 * This is needed to avoid races between wake_up_pollfree() above and
+	 * someone else removing the last entry from the queue for other reasons
+	 * (e.g. ep_remove_wait_queue() being called due to an epoll file
+	 * descriptor being closed).  Such other users hold an RCU read lock, so
+	 * we can be sure they're done after we call synchronize_rcu().
 	 */
 	if (thread->looper & BINDER_LOOPER_STATE_POLL)
 		synchronize_rcu();

[PATCH 4.19 36/74] signalfd: use wake_up_pollfree()

[Greg Kroah-Hartman]

From: Eric Biggers <ebiggers@google.com>

commit 9537bae0da1f8d1e2361ab6d0479e8af7824e160 upstream.

wake_up_poll() uses nr_exclusive=1, so it's not guaranteed to wake up
all exclusive waiters.  Yet, POLLFREE *must* wake up all waiters.  epoll
and aio poll are fortunately not affected by this, but it's very
fragile.  Thus, the new function wake_up_pollfree() has been introduced.

Convert signalfd to use wake_up_pollfree().

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: d80e731ecab4 ("epoll: introduce POLLFREE to flush ->signalfd_wqh before kfree()")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20211209010455.42744-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/signalfd.c |   12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -35,17 +35,7 @@
 
 void signalfd_cleanup(struct sighand_struct *sighand)
 {
-	wait_queue_head_t *wqh = &sighand->signalfd_wqh;
-	/*
-	 * The lockless check can race with remove_wait_queue() in progress,
-	 * but in this case its caller should run under rcu_read_lock() and
-	 * sighand_cachep is SLAB_TYPESAFE_BY_RCU, we can safely return.
-	 */
-	if (likely(!waitqueue_active(wqh)))
-		return;
-
-	/* wait_queue_entry_t->func(POLLFREE) should do remove_wait_queue() */
-	wake_up_poll(wqh, EPOLLHUP | POLLFREE);
+	wake_up_pollfree(&sighand->signalfd_wqh);
 }
 
 struct signalfd_ctx {

[PATCH 4.19 37/74] aio: keep poll requests on waitqueue until completed

[Greg Kroah-Hartman]

From: Eric Biggers <ebiggers@google.com>

commit 363bee27e25804d8981dd1c025b4ad49dc39c530 upstream.

Currently, aio_poll_wake() will always remove the poll request from the
waitqueue.  Then, if aio_poll_complete_work() sees that none of the
polled events are ready and the request isn't cancelled, it re-adds the
request to the waitqueue.  (This can easily happen when polling a file
that doesn't pass an event mask when waking up its waitqueue.)

This is fundamentally broken for two reasons:

  1. If a wakeup occurs between vfs_poll() and the request being
     re-added to the waitqueue, it will be missed because the request
     wasn't on the waitqueue at the time.  Therefore, IOCB_CMD_POLL
     might never complete even if the polled file is ready.

  2. When the request isn't on the waitqueue, there is no way to be
     notified that the waitqueue is being freed (which happens when its
     lifetime is shorter than the struct file's).  This is supposed to
     happen via the waitqueue entries being woken up with POLLFREE.

Therefore, leave the requests on the waitqueue until they are actually
completed (or cancelled).  To keep track of when aio_poll_complete_work
needs to be scheduled, use new fields in struct poll_iocb.  Remove the
'done' field which is now redundant.

Note that this is consistent with how sys_poll() and eventpoll work;
their wakeup functions do *not* remove the waitqueue entries.

Fixes: 2c14fa838cbe ("aio: implement IOCB_CMD_POLL")
Cc: <stable@vger.kernel.org> # v4.18+
Link: https://lore.kernel.org/r/20211209010455.42744-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/aio.c |   83 +++++++++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 63 insertions(+), 20 deletions(-)

--- a/fs/aio.c
+++ b/fs/aio.c
@@ -176,8 +176,9 @@ struct poll_iocb {
 	struct file		*file;
 	struct wait_queue_head	*head;
 	__poll_t		events;
-	bool			done;
 	bool			cancelled;
+	bool			work_scheduled;
+	bool			work_need_resched;
 	struct wait_queue_entry	wait;
 	struct work_struct	work;
 };
@@ -1635,14 +1636,26 @@ static void aio_poll_complete_work(struc
 	 * avoid further branches in the fast path.
 	 */
 	spin_lock_irq(&ctx->ctx_lock);
+	spin_lock(&req->head->lock);
 	if (!mask && !READ_ONCE(req->cancelled)) {
-		add_wait_queue(req->head, &req->wait);
+		/*
+		 * The request isn't actually ready to be completed yet.
+		 * Reschedule completion if another wakeup came in.
+		 */
+		if (req->work_need_resched) {
+			schedule_work(&req->work);
+			req->work_need_resched = false;
+		} else {
+			req->work_scheduled = false;
+		}
+		spin_unlock(&req->head->lock);
 		spin_unlock_irq(&ctx->ctx_lock);
 		return;
 	}
+	list_del_init(&req->wait.entry);
+	spin_unlock(&req->head->lock);
 	list_del_init(&iocb->ki_list);
 	iocb->ki_res.res = mangle_poll(mask);
-	req->done = true;
 	spin_unlock_irq(&ctx->ctx_lock);
 
 	iocb_put(iocb);
@@ -1656,9 +1669,9 @@ static int aio_poll_cancel(struct kiocb
 
 	spin_lock(&req->head->lock);
 	WRITE_ONCE(req->cancelled, true);
-	if (!list_empty(&req->wait.entry)) {
-		list_del_init(&req->wait.entry);
+	if (!req->work_scheduled) {
 		schedule_work(&aiocb->poll.work);
+		req->work_scheduled = true;
 	}
 	spin_unlock(&req->head->lock);
 
@@ -1677,20 +1690,26 @@ static int aio_poll_wake(struct wait_que
 	if (mask && !(mask & req->events))
 		return 0;
 
-	list_del_init(&req->wait.entry);
-
-	if (mask && spin_trylock_irqsave(&iocb->ki_ctx->ctx_lock, flags)) {
+	/*
+	 * Complete the request inline if possible.  This requires that three
+	 * conditions be met:
+	 *   1. An event mask must have been passed.  If a plain wakeup was done
+	 *	instead, then mask == 0 and we have to call vfs_poll() to get
+	 *	the events, so inline completion isn't possible.
+	 *   2. The completion work must not have already been scheduled.
+	 *   3. ctx_lock must not be busy.  We have to use trylock because we
+	 *	already hold the waitqueue lock, so this inverts the normal
+	 *	locking order.  Use irqsave/irqrestore because not all
+	 *	filesystems (e.g. fuse) call this function with IRQs disabled,
+	 *	yet IRQs have to be disabled before ctx_lock is obtained.
+	 */
+	if (mask && !req->work_scheduled &&
+	    spin_trylock_irqsave(&iocb->ki_ctx->ctx_lock, flags)) {
 		struct kioctx *ctx = iocb->ki_ctx;
 
-		/*
-		 * Try to complete the iocb inline if we can. Use
-		 * irqsave/irqrestore because not all filesystems (e.g. fuse)
-		 * call this function with IRQs disabled and because IRQs
-		 * have to be disabled before ctx_lock is obtained.
-		 */
+		list_del_init(&req->wait.entry);
 		list_del(&iocb->ki_list);
 		iocb->ki_res.res = mangle_poll(mask);
-		req->done = true;
 		if (iocb->ki_eventfd && eventfd_signal_count()) {
 			iocb = NULL;
 			INIT_WORK(&req->work, aio_poll_put_work);
@@ -1700,7 +1719,20 @@ static int aio_poll_wake(struct wait_que
 		if (iocb)
 			iocb_put(iocb);
 	} else {
-		schedule_work(&req->work);
+		/*
+		 * Schedule the completion work if needed.  If it was already
+		 * scheduled, record that another wakeup came in.
+		 *
+		 * Don't remove the request from the waitqueue here, as it might
+		 * not actually be complete yet (we won't know until vfs_poll()
+		 * is called), and we must not miss any wakeups.
+		 */
+		if (req->work_scheduled) {
+			req->work_need_resched = true;
+		} else {
+			schedule_work(&req->work);
+			req->work_scheduled = true;
+		}
 	}
 	return 1;
 }
@@ -1747,8 +1779,9 @@ static ssize_t aio_poll(struct aio_kiocb
 	req->events = demangle_poll(iocb->aio_buf) | EPOLLERR | EPOLLHUP;
 
 	req->head = NULL;
-	req->done = false;
 	req->cancelled = false;
+	req->work_scheduled = false;
+	req->work_need_resched = false;
 
 	apt.pt._qproc = aio_poll_queue_proc;
 	apt.pt._key = req->events;
@@ -1763,17 +1796,27 @@ static ssize_t aio_poll(struct aio_kiocb
 	spin_lock_irq(&ctx->ctx_lock);
 	if (likely(req->head)) {
 		spin_lock(&req->head->lock);
-		if (unlikely(list_empty(&req->wait.entry))) {
-			if (apt.error)
+		if (list_empty(&req->wait.entry) || req->work_scheduled) {
+			/*
+			 * aio_poll_wake() already either scheduled the async
+			 * completion work, or completed the request inline.
+			 */
+			if (apt.error) /* unsupported case: multiple queues */
 				cancel = true;
 			apt.error = 0;
 			mask = 0;
 		}
 		if (mask || apt.error) {
+			/* Steal to complete synchronously. */
 			list_del_init(&req->wait.entry);
 		} else if (cancel) {
+			/* Cancel if possible (may be too late though). */
 			WRITE_ONCE(req->cancelled, true);
-		} else if (!req->done) { /* actually waiting for an event */
+		} else if (!list_empty(&req->wait.entry)) {
+			/*
+			 * Actually waiting for an event, so add the request to
+			 * active_reqs so that it can be cancelled if needed.
+			 */
 			list_add_tail(&aiocb->ki_list, &ctx->active_reqs);
 			aiocb->ki_cancel = aio_poll_cancel;
 		}

[PATCH 4.19 38/74] aio: fix use-after-free due to missing POLLFREE handling

[Greg Kroah-Hartman]

From: Eric Biggers <ebiggers@google.com>

commit 50252e4b5e989ce64555c7aef7516bdefc2fea72 upstream.

signalfd_poll() and binder_poll() are special in that they use a
waitqueue whose lifetime is the current task, rather than the struct
file as is normally the case.  This is okay for blocking polls, since a
blocking poll occurs within one task; however, non-blocking polls
require another solution.  This solution is for the queue to be cleared
before it is freed, by sending a POLLFREE notification to all waiters.

Unfortunately, only eventpoll handles POLLFREE.  A second type of
non-blocking poll, aio poll, was added in kernel v4.18, and it doesn't
handle POLLFREE.  This allows a use-after-free to occur if a signalfd or
binder fd is polled with aio poll, and the waitqueue gets freed.

Fix this by making aio poll handle POLLFREE.

A patch by Ramji Jiyani <ramjiyani@google.com>
(https://lore.kernel.org/r/20211027011834.2497484-1-ramjiyani@google.com)
tried to do this by making aio_poll_wake() always complete the request
inline if POLLFREE is seen.  However, that solution had two bugs.
First, it introduced a deadlock, as it unconditionally locked the aio
context while holding the waitqueue lock, which inverts the normal
locking order.  Second, it didn't consider that POLLFREE notifications
are missed while the request has been temporarily de-queued.

The second problem was solved by my previous patch.  This patch then
properly fixes the use-after-free by handling POLLFREE in a
deadlock-free way.  It does this by taking advantage of the fact that
freeing of the waitqueue is RCU-delayed, similar to what eventpoll does.

Fixes: 2c14fa838cbe ("aio: implement IOCB_CMD_POLL")
Cc: <stable@vger.kernel.org> # v4.18+
Link: https://lore.kernel.org/r/20211209010455.42744-6-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/aio.c                        |  137 ++++++++++++++++++++++++++++++----------
 include/uapi/asm-generic/poll.h |    2 
 2 files changed, 107 insertions(+), 32 deletions(-)

--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1617,6 +1617,51 @@ static void aio_poll_put_work(struct wor
 	iocb_put(iocb);
 }
 
+/*
+ * Safely lock the waitqueue which the request is on, synchronizing with the
+ * case where the ->poll() provider decides to free its waitqueue early.
+ *
+ * Returns true on success, meaning that req->head->lock was locked, req->wait
+ * is on req->head, and an RCU read lock was taken.  Returns false if the
+ * request was already removed from its waitqueue (which might no longer exist).
+ */
+static bool poll_iocb_lock_wq(struct poll_iocb *req)
+{
+	wait_queue_head_t *head;
+
+	/*
+	 * While we hold the waitqueue lock and the waitqueue is nonempty,
+	 * wake_up_pollfree() will wait for us.  However, taking the waitqueue
+	 * lock in the first place can race with the waitqueue being freed.
+	 *
+	 * We solve this as eventpoll does: by taking advantage of the fact that
+	 * all users of wake_up_pollfree() will RCU-delay the actual free.  If
+	 * we enter rcu_read_lock() and see that the pointer to the queue is
+	 * non-NULL, we can then lock it without the memory being freed out from
+	 * under us, then check whether the request is still on the queue.
+	 *
+	 * Keep holding rcu_read_lock() as long as we hold the queue lock, in
+	 * case the caller deletes the entry from the queue, leaving it empty.
+	 * In that case, only RCU prevents the queue memory from being freed.
+	 */
+	rcu_read_lock();
+	head = smp_load_acquire(&req->head);
+	if (head) {
+		spin_lock(&head->lock);
+		if (!list_empty(&req->wait.entry))
+			return true;
+		spin_unlock(&head->lock);
+	}
+	rcu_read_unlock();
+	return false;
+}
+
+static void poll_iocb_unlock_wq(struct poll_iocb *req)
+{
+	spin_unlock(&req->head->lock);
+	rcu_read_unlock();
+}
+
 static void aio_poll_complete_work(struct work_struct *work)
 {
 	struct poll_iocb *req = container_of(work, struct poll_iocb, work);
@@ -1636,24 +1681,25 @@ static void aio_poll_complete_work(struc
 	 * avoid further branches in the fast path.
 	 */
 	spin_lock_irq(&ctx->ctx_lock);
-	spin_lock(&req->head->lock);
-	if (!mask && !READ_ONCE(req->cancelled)) {
-		/*
-		 * The request isn't actually ready to be completed yet.
-		 * Reschedule completion if another wakeup came in.
-		 */
-		if (req->work_need_resched) {
-			schedule_work(&req->work);
-			req->work_need_resched = false;
-		} else {
-			req->work_scheduled = false;
+	if (poll_iocb_lock_wq(req)) {
+		if (!mask && !READ_ONCE(req->cancelled)) {
+			/*
+			 * The request isn't actually ready to be completed yet.
+			 * Reschedule completion if another wakeup came in.
+			 */
+			if (req->work_need_resched) {
+				schedule_work(&req->work);
+				req->work_need_resched = false;
+			} else {
+				req->work_scheduled = false;
+			}
+			poll_iocb_unlock_wq(req);
+			spin_unlock_irq(&ctx->ctx_lock);
+			return;
 		}
-		spin_unlock(&req->head->lock);
-		spin_unlock_irq(&ctx->ctx_lock);
-		return;
-	}
-	list_del_init(&req->wait.entry);
-	spin_unlock(&req->head->lock);
+		list_del_init(&req->wait.entry);
+		poll_iocb_unlock_wq(req);
+	} /* else, POLLFREE has freed the waitqueue, so we must complete */
 	list_del_init(&iocb->ki_list);
 	iocb->ki_res.res = mangle_poll(mask);
 	spin_unlock_irq(&ctx->ctx_lock);
@@ -1667,13 +1713,14 @@ static int aio_poll_cancel(struct kiocb
 	struct aio_kiocb *aiocb = container_of(iocb, struct aio_kiocb, rw);
 	struct poll_iocb *req = &aiocb->poll;
 
-	spin_lock(&req->head->lock);
-	WRITE_ONCE(req->cancelled, true);
-	if (!req->work_scheduled) {
-		schedule_work(&aiocb->poll.work);
-		req->work_scheduled = true;
-	}
-	spin_unlock(&req->head->lock);
+	if (poll_iocb_lock_wq(req)) {
+		WRITE_ONCE(req->cancelled, true);
+		if (!req->work_scheduled) {
+			schedule_work(&aiocb->poll.work);
+			req->work_scheduled = true;
+		}
+		poll_iocb_unlock_wq(req);
+	} /* else, the request was force-cancelled by POLLFREE already */
 
 	return 0;
 }
@@ -1725,7 +1772,8 @@ static int aio_poll_wake(struct wait_que
 		 *
 		 * Don't remove the request from the waitqueue here, as it might
 		 * not actually be complete yet (we won't know until vfs_poll()
-		 * is called), and we must not miss any wakeups.
+		 * is called), and we must not miss any wakeups.  POLLFREE is an
+		 * exception to this; see below.
 		 */
 		if (req->work_scheduled) {
 			req->work_need_resched = true;
@@ -1733,6 +1781,28 @@ static int aio_poll_wake(struct wait_que
 			schedule_work(&req->work);
 			req->work_scheduled = true;
 		}
+
+		/*
+		 * If the waitqueue is being freed early but we can't complete
+		 * the request inline, we have to tear down the request as best
+		 * we can.  That means immediately removing the request from its
+		 * waitqueue and preventing all further accesses to the
+		 * waitqueue via the request.  We also need to schedule the
+		 * completion work (done above).  Also mark the request as
+		 * cancelled, to potentially skip an unneeded call to ->poll().
+		 */
+		if (mask & POLLFREE) {
+			WRITE_ONCE(req->cancelled, true);
+			list_del_init(&req->wait.entry);
+
+			/*
+			 * Careful: this *must* be the last step, since as soon
+			 * as req->head is NULL'ed out, the request can be
+			 * completed and freed, since aio_poll_complete_work()
+			 * will no longer need to take the waitqueue lock.
+			 */
+			smp_store_release(&req->head, NULL);
+		}
 	}
 	return 1;
 }
@@ -1740,6 +1810,7 @@ static int aio_poll_wake(struct wait_que
 struct aio_poll_table {
 	struct poll_table_struct	pt;
 	struct aio_kiocb		*iocb;
+	bool				queued;
 	int				error;
 };
 
@@ -1750,11 +1821,12 @@ aio_poll_queue_proc(struct file *file, s
 	struct aio_poll_table *pt = container_of(p, struct aio_poll_table, pt);
 
 	/* multiple wait queues per file are not supported */
-	if (unlikely(pt->iocb->poll.head)) {
+	if (unlikely(pt->queued)) {
 		pt->error = -EINVAL;
 		return;
 	}
 
+	pt->queued = true;
 	pt->error = 0;
 	pt->iocb->poll.head = head;
 	add_wait_queue(head, &pt->iocb->poll.wait);
@@ -1786,6 +1858,7 @@ static ssize_t aio_poll(struct aio_kiocb
 	apt.pt._qproc = aio_poll_queue_proc;
 	apt.pt._key = req->events;
 	apt.iocb = aiocb;
+	apt.queued = false;
 	apt.error = -EINVAL; /* same as no support for IOCB_CMD_POLL */
 
 	/* initialized the list so that we can do list_empty checks */
@@ -1794,9 +1867,10 @@ static ssize_t aio_poll(struct aio_kiocb
 
 	mask = vfs_poll(req->file, &apt.pt) & req->events;
 	spin_lock_irq(&ctx->ctx_lock);
-	if (likely(req->head)) {
-		spin_lock(&req->head->lock);
-		if (list_empty(&req->wait.entry) || req->work_scheduled) {
+	if (likely(apt.queued)) {
+		bool on_queue = poll_iocb_lock_wq(req);
+
+		if (!on_queue || req->work_scheduled) {
 			/*
 			 * aio_poll_wake() already either scheduled the async
 			 * completion work, or completed the request inline.
@@ -1812,7 +1886,7 @@ static ssize_t aio_poll(struct aio_kiocb
 		} else if (cancel) {
 			/* Cancel if possible (may be too late though). */
 			WRITE_ONCE(req->cancelled, true);
-		} else if (!list_empty(&req->wait.entry)) {
+		} else if (on_queue) {
 			/*
 			 * Actually waiting for an event, so add the request to
 			 * active_reqs so that it can be cancelled if needed.
@@ -1820,7 +1894,8 @@ static ssize_t aio_poll(struct aio_kiocb
 			list_add_tail(&aiocb->ki_list, &ctx->active_reqs);
 			aiocb->ki_cancel = aio_poll_cancel;
 		}
-		spin_unlock(&req->head->lock);
+		if (on_queue)
+			poll_iocb_unlock_wq(req);
 	}
 	if (mask) { /* no async, we'd stolen it */
 		aiocb->ki_res.res = mangle_poll(mask);
--- a/include/uapi/asm-generic/poll.h
+++ b/include/uapi/asm-generic/poll.h
@@ -29,7 +29,7 @@
 #define POLLRDHUP       0x2000
 #endif
 
-#define POLLFREE	(__force __poll_t)0x4000	/* currently only for epoll */
+#define POLLFREE	(__force __poll_t)0x4000
 
 #define POLL_BUSY_LOOP	(__force __poll_t)0x8000
 

[PATCH 4.19 39/74] tracefs: Set all files to the same group ownership as the mount option

[Greg Kroah-Hartman]

From: Steven Rostedt (VMware) <rostedt@goodmis.org>

commit 48b27b6b5191e2e1f2798cd80877b6e4ef47c351 upstream.

As people have been asking to allow non-root processes to have access to
the tracefs directory, it was considered best to only allow groups to have
access to the directory, where it is easier to just set the tracefs file
system to a specific group (as other would be too dangerous), and that way
the admins could pick which processes would have access to tracefs.

Unfortunately, this broke tooling on Android that expected the other bit
to be set. For some special cases, for non-root tools to trace the system,
tracefs would be mounted and change the permissions of the top level
directory which gave access to all running tasks permission to the
tracing directory. Even though this would be dangerous to do in a
production environment, for testing environments this can be useful.

Now with the new changes to not allow other (which is still the proper
thing to do), it breaks the testing tooling. Now more code needs to be
loaded on the system to change ownership of the tracing directory.

The real solution is to have tracefs honor the gid=xxx option when
mounting. That is,

(tracing group tracing has value 1003)

 mount -t tracefs -o gid=1003 tracefs /sys/kernel/tracing

should have it that all files in the tracing directory should be of the
given group.

Copy the logic from d_walk() from dcache.c and simplify it for the mount
case of tracefs if gid is set. All the files in tracefs will be walked and
their group will be set to the value passed in.

Link: https://lkml.kernel.org/r/20211207171729.2a54e1b3@gandalf.local.home

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-fsdevel@vger.kernel.org
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reported-by: Kalesh Singh <kaleshsingh@google.com>
Reported-by: Yabin Cui <yabinc@google.com>
Fixes: 49d67e445742 ("tracefs: Have tracefs directories not set OTH permission bits by default")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/tracefs/inode.c |   72 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -162,6 +162,77 @@ struct tracefs_fs_info {
 	struct tracefs_mount_opts mount_opts;
 };
 
+static void change_gid(struct dentry *dentry, kgid_t gid)
+{
+	if (!dentry->d_inode)
+		return;
+	dentry->d_inode->i_gid = gid;
+}
+
+/*
+ * Taken from d_walk, but without he need for handling renames.
+ * Nothing can be renamed while walking the list, as tracefs
+ * does not support renames. This is only called when mounting
+ * or remounting the file system, to set all the files to
+ * the given gid.
+ */
+static void set_gid(struct dentry *parent, kgid_t gid)
+{
+	struct dentry *this_parent;
+	struct list_head *next;
+
+	this_parent = parent;
+	spin_lock(&this_parent->d_lock);
+
+	change_gid(this_parent, gid);
+repeat:
+	next = this_parent->d_subdirs.next;
+resume:
+	while (next != &this_parent->d_subdirs) {
+		struct list_head *tmp = next;
+		struct dentry *dentry = list_entry(tmp, struct dentry, d_child);
+		next = tmp->next;
+
+		spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+
+		change_gid(dentry, gid);
+
+		if (!list_empty(&dentry->d_subdirs)) {
+			spin_unlock(&this_parent->d_lock);
+			spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_);
+			this_parent = dentry;
+			spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_);
+			goto repeat;
+		}
+		spin_unlock(&dentry->d_lock);
+	}
+	/*
+	 * All done at this level ... ascend and resume the search.
+	 */
+	rcu_read_lock();
+ascend:
+	if (this_parent != parent) {
+		struct dentry *child = this_parent;
+		this_parent = child->d_parent;
+
+		spin_unlock(&child->d_lock);
+		spin_lock(&this_parent->d_lock);
+
+		/* go into the first sibling still alive */
+		do {
+			next = child->d_child.next;
+			if (next == &this_parent->d_subdirs)
+				goto ascend;
+			child = list_entry(next, struct dentry, d_child);
+		} while (unlikely(child->d_flags & DCACHE_DENTRY_KILLED));
+		rcu_read_unlock();
+		goto resume;
+	}
+	rcu_read_unlock();
+	spin_unlock(&this_parent->d_lock);
+	return;
+}
+
 static int tracefs_parse_options(char *data, struct tracefs_mount_opts *opts)
 {
 	substring_t args[MAX_OPT_ARGS];
@@ -194,6 +265,7 @@ static int tracefs_parse_options(char *d
 			if (!gid_valid(gid))
 				return -EINVAL;
 			opts->gid = gid;
+			set_gid(tracefs_mount->mnt_root, gid);
 			break;
 		case Opt_mode:
 			if (match_octal(&args[0], &option))

[PATCH 4.19 40/74] block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)

[Greg Kroah-Hartman]

From: Davidlohr Bueso <dave@stgolabs.net>

commit e6a59aac8a8713f335a37d762db0dbe80e7f6d38 upstream.

do_each_pid_thread(PIDTYPE_PGID) can race with a concurrent
change_pid(PIDTYPE_PGID) that can move the task from one hlist
to another while iterating. Serialize ioprio_get to take
the tasklist_lock in this case, just like it's set counterpart.

Fixes: d69b78ba1de (ioprio: grab rcu_read_lock in sys_ioprio_{set,get}())
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Link: https://lore.kernel.org/r/20211210182058.43417-1-dave@stgolabs.net
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 block/ioprio.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/block/ioprio.c
+++ b/block/ioprio.c
@@ -206,6 +206,7 @@ SYSCALL_DEFINE2(ioprio_get, int, which,
 				pgrp = task_pgrp(current);
 			else
 				pgrp = find_vpid(who);
+			read_lock(&tasklist_lock);
 			do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
 				tmpio = get_task_ioprio(p);
 				if (tmpio < 0)
@@ -215,6 +216,8 @@ SYSCALL_DEFINE2(ioprio_get, int, which,
 				else
 					ret = ioprio_best(ret, tmpio);
 			} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
+			read_unlock(&tasklist_lock);
+
 			break;
 		case IOPRIO_WHO_USER:
 			uid = make_kuid(current_user_ns(), who);

[PATCH 4.19 41/74] qede: validate non LSO skb length

[Greg Kroah-Hartman]

From: Manish Chopra <manishc@marvell.com>

commit 8e227b198a55859bf790dc7f4b1e30c0859c6756 upstream.

Although it is unlikely that stack could transmit a non LSO
skb with length > MTU, however in some cases or environment such
occurrences actually resulted into firmware asserts due to packet
length being greater than the max supported by the device (~9700B).

This patch adds the safeguard for such odd cases to avoid firmware
asserts.

v2: Added "Fixes" tag with one of the initial driver commit
    which enabled the TX traffic actually (as this was probably
    day1 issue which was discovered recently by some customer
    environment)

Fixes: a2ec6172d29c ("qede: Add support for link")
Signed-off-by: Manish Chopra <manishc@marvell.com>
Signed-off-by: Alok Prasad <palok@marvell.com>
Signed-off-by: Prabhakar Kushwaha <pkushwaha@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Link: https://lore.kernel.org/r/20211203174413.13090-1-manishc@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/qlogic/qede/qede_fp.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/net/ethernet/qlogic/qede/qede_fp.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_fp.c
@@ -1606,6 +1606,13 @@ netdev_tx_t qede_start_xmit(struct sk_bu
 			data_split = true;
 		}
 	} else {
+		if (unlikely(skb->len > ETH_TX_MAX_NON_LSO_PKT_LEN)) {
+			DP_ERR(edev, "Unexpected non LSO skb length = 0x%x\n", skb->len);
+			qede_free_failed_tx_pkt(txq, first_bd, 0, false);
+			qede_update_tx_producer(txq);
+			return NETDEV_TX_OK;
+		}
+
 		val |= ((skb->len & ETH_TX_DATA_1ST_BD_PKT_LEN_MASK) <<
 			 ETH_TX_DATA_1ST_BD_PKT_LEN_SHIFT);
 	}

[PATCH 4.19 42/74] ASoC: qdsp6: q6routing: Fix return value from msm_routing_put_audio_mixer

[Greg Kroah-Hartman]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

commit 4739d88ad8e1900f809f8a5c98f3c1b65bf76220 upstream.

msm_routing_put_audio_mixer() can return incorrect value in various scenarios.

scenario 1:
amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 1
amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 0

return value is 0 instead of 1 eventhough value was changed

scenario 2:
amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 1
amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 1

return value is 1 instead of 0 eventhough the value was not changed

scenario 3:
amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 0
return value is 1 instead of 0 eventhough the value was not changed

Fix this by adding checks, so that change notifications are sent correctly.

Fixes: e3a33673e845 ("ASoC: qdsp6: q6routing: Add q6routing driver")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20211130163110.5628-1-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/soc/qcom/qdsp6/q6routing.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/sound/soc/qcom/qdsp6/q6routing.c
+++ b/sound/soc/qcom/qdsp6/q6routing.c
@@ -440,14 +440,16 @@ static int msm_routing_put_audio_mixer(s
 	struct session_data *session = &data->sessions[session_id];
 
 	if (ucontrol->value.integer.value[0]) {
+		if (session->port_id == be_id)
+			return 0;
+
 		session->port_id = be_id;
 		snd_soc_dapm_mixer_update_power(dapm, kcontrol, 1, update);
 	} else {
-		if (session->port_id == be_id) {
-			session->port_id = -1;
+		if (session->port_id == -1 || session->port_id != be_id)
 			return 0;
-		}
 
+		session->port_id = -1;
 		snd_soc_dapm_mixer_update_power(dapm, kcontrol, 0, update);
 	}
 

[PATCH 4.19 43/74] i40e: Fix pre-set max number of queues for VF

[Greg Kroah-Hartman]

From: Mateusz Palczewski <mateusz.palczewski@intel.com>

commit 8aa55ab422d9d0d825ebfb877702ed661e96e682 upstream.

After setting pre-set combined to 16 queues and reserving 16 queues by
tc qdisc, pre-set maximum combined queues returned to default value
after VF reset being 4 and this generated errors during removing tc.
Fixed by removing clear num_req_queues before reset VF.

Fixes: e284fc280473 (i40e: Add and delete cloud filter)
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Bindushree P <Bindushree.p@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c |    5 -----
 1 file changed, 5 deletions(-)

--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -3580,11 +3580,6 @@ static int i40e_vc_add_qch_msg(struct i4
 
 	/* set this flag only after making sure all inputs are sane */
 	vf->adq_enabled = true;
-	/* num_req_queues is set when user changes number of queues via ethtool
-	 * and this causes issue for default VSI(which depends on this variable)
-	 * when ADq is enabled, hence reset it.
-	 */
-	vf->num_req_queues = 0;
 
 	/* reset the VF in order to allocate resources */
 	i40e_vc_notify_vf_reset(vf);

[PATCH 4.19 44/74] mtd: rawnand: fsmc: Take instruction delay into account

[Greg Kroah-Hartman]

From: Herve Codina <herve.codina@bootlin.com>

commit a4ca0c439f2d5ce9a3dc118d882f9f03449864c8 upstream.

The FSMC NAND controller should apply a delay after the
instruction has been issued on the bus.
The FSMC NAND controller driver did not handle this delay.

Add this waiting delay in the FSMC NAND controller driver.

Fixes: 4da712e70294 ("mtd: nand: fsmc: use ->exec_op()")
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211119150316.43080-4-herve.codina@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/mtd/nand/raw/fsmc_nand.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/mtd/nand/raw/fsmc_nand.c
+++ b/drivers/mtd/nand/raw/fsmc_nand.c
@@ -18,6 +18,7 @@
 
 #include <linux/clk.h>
 #include <linux/completion.h>
+#include <linux/delay.h>
 #include <linux/dmaengine.h>
 #include <linux/dma-direction.h>
 #include <linux/dma-mapping.h>
@@ -700,6 +701,9 @@ static int fsmc_exec_op(struct nand_chip
 						instr->ctx.waitrdy.timeout_ms);
 			break;
 		}
+
+		if (instr->delay_ns)
+			ndelay(instr->delay_ns);
 	}
 
 	return ret;

[PATCH 4.19 45/74] tools build: Remove needless libpython-version feature check that breaks test-all fast path

[Greg Kroah-Hartman]

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

commit 3d1d57debee2d342a47615707588b96658fabb85 upstream.

Since 66dfdff03d196e51 ("perf tools: Add Python 3 support") we don't use
the tools/build/feature/test-libpython-version.c version in any Makefile
feature check:

  $ find tools/ -type f | xargs grep feature-libpython-version
  $

The only place where this was used was removed in 66dfdff03d196e51:

  -        ifneq ($(feature-libpython-version), 1)
  -          $(warning Python 3 is not yet supported; please set)
  -          $(warning PYTHON and/or PYTHON_CONFIG appropriately.)
  -          $(warning If you also have Python 2 installed, then)
  -          $(warning try something like:)
  -          $(warning $(and ,))
  -          $(warning $(and ,)  make PYTHON=python2)
  -          $(warning $(and ,))
  -          $(warning Otherwise, disable Python support entirely:)
  -          $(warning $(and ,))
  -          $(warning $(and ,)  make NO_LIBPYTHON=1)
  -          $(warning $(and ,))
  -          $(error   $(and ,))
  -        else
  -          LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
  -          EXTLIBS += $(PYTHON_EMBED_LIBADD)
  -          LANG_BINDINGS += $(obj-perf)python/perf.so
  -          $(call detected,CONFIG_LIBPYTHON)
  -        endif

And nowadays we either build with PYTHON=python3 or just install the
python3 devel packages and perf will build against it.

But the leftover feature-libpython-version check made the fast path
feature detection to break in all cases except when python2 devel files
were installed:

  $ rpm -qa | grep python.*devel
  python3-devel-3.9.7-1.fc34.x86_64
  $ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ;
  $ make -C tools/perf O=/tmp/build/perf install-bin
  make: Entering directory '/var/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j32' parallel build
    HOSTCC  /tmp/build/perf/fixdep.o
  <SNIP>
  $ cat /tmp/build/perf/feature/test-all.make.output
  In file included from test-all.c:18:
  test-libpython-version.c:5:10: error: #error
      5 |         #error
        |          ^~~~~
  $ ldd ~/bin/perf | grep python
	libpython3.9.so.1.0 => /lib64/libpython3.9.so.1.0 (0x00007fda6dbcf000)
  $

As python3 is the norm these days, fix this by just removing the unused
feature-libpython-version feature check, making the test-all fast path
to work with the common case.

With this:

  $ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ;
  $ make -C tools/perf O=/tmp/build/perf install-bin |& head
  make: Entering directory '/var/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j32' parallel build
    HOSTCC  /tmp/build/perf/fixdep.o
    HOSTLD  /tmp/build/perf/fixdep-in.o
    LINK    /tmp/build/perf/fixdep

  Auto-detecting system features:
  ...                         dwarf: [ on  ]
  ...            dwarf_getlocations: [ on  ]
  ...                         glibc: [ on  ]
  $ ldd ~/bin/perf | grep python
	libpython3.9.so.1.0 => /lib64/libpython3.9.so.1.0 (0x00007f58800b0000)
  $ cat /tmp/build/perf/feature/test-all.make.output
  $

Reviewed-by: James Clark <james.clark@arm.com>
Fixes: 66dfdff03d196e51 ("perf tools: Add Python 3 support")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jaroslav Škarvada <jskarvad@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/YaYmeeC6CS2b8OSz@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 tools/build/Makefile.feature                 |    1 -
 tools/build/feature/Makefile                 |    4 ----
 tools/build/feature/test-all.c               |    5 -----
 tools/build/feature/test-libpython-version.c |   11 -----------
 tools/perf/Makefile.config                   |    2 --
 5 files changed, 23 deletions(-)
 delete mode 100644 tools/build/feature/test-libpython-version.c

--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -50,7 +50,6 @@ FEATURE_TESTS_BASIC :=
         numa_num_possible_cpus          \
         libperl                         \
         libpython                       \
-        libpython-version               \
         libslang                        \
         libcrypto                       \
         libunwind                       \
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -29,7 +29,6 @@ FILES=
          test-numa_num_possible_cpus.bin        \
          test-libperl.bin                       \
          test-libpython.bin                     \
-         test-libpython-version.bin             \
          test-libslang.bin                      \
          test-libcrypto.bin                     \
          test-libunwind.bin                     \
@@ -203,9 +202,6 @@ $(OUTPUT)test-libperl.bin:
 $(OUTPUT)test-libpython.bin:
 	$(BUILD) $(FLAGS_PYTHON_EMBED)
 
-$(OUTPUT)test-libpython-version.bin:
-	$(BUILD)
-
 $(OUTPUT)test-libbfd.bin:
 	$(BUILD) -DPACKAGE='"perf"' -lbfd -ldl
 
--- a/tools/build/feature/test-all.c
+++ b/tools/build/feature/test-all.c
@@ -14,10 +14,6 @@
 # include "test-libpython.c"
 #undef main
 
-#define main main_test_libpython_version
-# include "test-libpython-version.c"
-#undef main
-
 #define main main_test_libperl
 # include "test-libperl.c"
 #undef main
@@ -181,7 +177,6 @@
 int main(int argc, char *argv[])
 {
 	main_test_libpython();
-	main_test_libpython_version();
 	main_test_libperl();
 	main_test_hello();
 	main_test_libelf();
--- a/tools/build/feature/test-libpython-version.c
+++ /dev/null
@@ -1,11 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <Python.h>
-
-#if PY_VERSION_HEX >= 0x03000000
-	#error
-#endif
-
-int main(void)
-{
-	return 0;
-}
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -224,8 +224,6 @@ endif
 
 FEATURE_CHECK_CFLAGS-libpython := $(PYTHON_EMBED_CCOPTS)
 FEATURE_CHECK_LDFLAGS-libpython := $(PYTHON_EMBED_LDOPTS)
-FEATURE_CHECK_CFLAGS-libpython-version := $(PYTHON_EMBED_CCOPTS)
-FEATURE_CHECK_LDFLAGS-libpython-version := $(PYTHON_EMBED_LDOPTS)
 
 CFLAGS += -fno-omit-frame-pointer
 CFLAGS += -ggdb3

[PATCH 4.19 46/74] net: cdc_ncm: Allow for dwNtbOutMaxSize to be unset or zero

[Greg Kroah-Hartman]

From: Lee Jones <lee.jones@linaro.org>

commit 2be6d4d16a0849455a5c22490e3c5983495fed00 upstream.

Currently, due to the sequential use of min_t() and clamp_t() macros,
in cdc_ncm_check_tx_max(), if dwNtbOutMaxSize is not set, the logic
sets tx_max to 0.  This is then used to allocate the data area of the
SKB requested later in cdc_ncm_fill_tx_frame().

This does not cause an issue presently because when memory is
allocated during initialisation phase of SKB creation, more memory
(512b) is allocated than is required for the SKB headers alone (320b),
leaving some space (512b - 320b = 192b) for CDC data (172b).

However, if more elements (for example 3 x u64 = [24b]) were added to
one of the SKB header structs, say 'struct skb_shared_info',
increasing its original size (320b [320b aligned]) to something larger
(344b [384b aligned]), then suddenly the CDC data (172b) no longer
fits in the spare SKB data area (512b - 384b = 128b).

Consequently the SKB bounds checking semantics fails and panics:

  skbuff: skb_over_panic: text:ffffffff830a5b5f len:184 put:172   \
     head:ffff888119227c00 data:ffff888119227c00 tail:0xb8 end:0x80 dev:<NULL>

  ------------[ cut here ]------------
  kernel BUG at net/core/skbuff.c:110!
  RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106
  <snip>
  Call Trace:
   <IRQ>
   skb_over_panic+0x2c/0x30 net/core/skbuff.c:115
   skb_put+0x205/0x210 net/core/skbuff.c:1877
   skb_put_zero include/linux/skbuff.h:2270 [inline]
   cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1116 [inline]
   cdc_ncm_fill_tx_frame+0x127f/0x3d50 drivers/net/usb/cdc_ncm.c:1293
   cdc_ncm_tx_fixup+0x98/0xf0 drivers/net/usb/cdc_ncm.c:1514

By overriding the max value with the default CDC_NCM_NTB_MAX_SIZE_TX
when not offered through the system provided params, we ensure enough
data space is allocated to handle the CDC data, meaning no crash will
occur.

Cc: Oliver Neukum <oliver@neukum.org>
Fixes: 289507d3364f9 ("net: cdc_ncm: use sysfs for rx/tx aggregation tuning")
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Bjørn Mork <bjorn@mork.no>
Link: https://lore.kernel.org/r/20211202143437.1411410-1-lee.jones@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/usb/cdc_ncm.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -177,6 +177,8 @@ static u32 cdc_ncm_check_tx_max(struct u
 	/* clamp new_tx to sane values */
 	min = ctx->max_datagram_size + ctx->max_ndp_size + sizeof(struct usb_cdc_ncm_nth16);
 	max = min_t(u32, CDC_NCM_NTB_MAX_SIZE_TX, le32_to_cpu(ctx->ncm_parm.dwNtbOutMaxSize));
+	if (max == 0)
+		max = CDC_NCM_NTB_MAX_SIZE_TX; /* dwNtbOutMaxSize not set */
 
 	/* some devices set dwNtbOutMaxSize too low for the above default */
 	min = min(min, max);

[PATCH 4.19 47/74] net: altera: set a couple error code in probe()

[Greg Kroah-Hartman]

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

commit badd7857f5c933a3dc34942a2c11d67fdbdc24de upstream.

There are two error paths which accidentally return success instead of
a negative error code.

Fixes: bbd2190ce96d ("Altera TSE: Add main and header file for Altera Ethernet Driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/altera/altera_tse_main.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/altera/altera_tse_main.c
+++ b/drivers/net/ethernet/altera/altera_tse_main.c
@@ -1445,16 +1445,19 @@ static int altera_tse_probe(struct platf
 		priv->rxdescmem_busaddr = dma_res->start;
 
 	} else {
+		ret = -ENODEV;
 		goto err_free_netdev;
 	}
 
-	if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask)))
+	if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask))) {
 		dma_set_coherent_mask(priv->device,
 				      DMA_BIT_MASK(priv->dmaops->dmamask));
-	else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32)))
+	} else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32))) {
 		dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32));
-	else
+	} else {
+		ret = -EIO;
 		goto err_free_netdev;
+	}
 
 	/* MAC address space */
 	ret = request_and_map(pdev, "control_port", &control_port,

[PATCH 4.19 48/74] net: fec: only clear interrupt of handling queue in fec_enet_rx_queue()

[Greg Kroah-Hartman]

From: Joakim Zhang <qiangqing.zhang@nxp.com>

commit b5bd95d17102b6719e3531d627875b9690371383 upstream.

Background:
We have a customer is running a Profinet stack on the 8MM which receives and
responds PNIO packets every 4ms and PNIO-CM packets every 40ms. However, from
time to time the received PNIO-CM package is "stock" and is only handled when
receiving a new PNIO-CM or DCERPC-Ping packet (tcpdump shows the PNIO-CM and
the DCERPC-Ping packet at the same time but the PNIO-CM HW timestamp is from
the expected 40 ms and not the 2s delay of the DCERPC-Ping).

After debugging, we noticed PNIO, PNIO-CM and DCERPC-Ping packets would
be handled by different RX queues.

The root cause should be driver ack all queues' interrupt when handle a
specific queue in fec_enet_rx_queue(). The blamed patch is introduced to
receive as much packets as possible once to avoid interrupt flooding.
But it's unreasonable to clear other queues'interrupt when handling one
queue, this patch tries to fix it.

Fixes: ed63f1dcd578 (net: fec: clear receive interrupts before processing a packet)
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Reported-by: Nicolas Diaz <nicolas.diaz@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Link: https://lore.kernel.org/r/20211206135457.15946-1-qiangqing.zhang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/freescale/fec.h      |    3 +++
 drivers/net/ethernet/freescale/fec_main.c |    2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -373,6 +373,9 @@ struct bufdesc_ex {
 #define FEC_ENET_WAKEUP	((uint)0x00020000)	/* Wakeup request */
 #define FEC_ENET_TXF	(FEC_ENET_TXF_0 | FEC_ENET_TXF_1 | FEC_ENET_TXF_2)
 #define FEC_ENET_RXF	(FEC_ENET_RXF_0 | FEC_ENET_RXF_1 | FEC_ENET_RXF_2)
+#define FEC_ENET_RXF_GET(X)	(((X) == 0) ? FEC_ENET_RXF_0 :	\
+				(((X) == 1) ? FEC_ENET_RXF_1 :	\
+				FEC_ENET_RXF_2))
 #define FEC_ENET_TS_AVAIL       ((uint)0x00010000)
 #define FEC_ENET_TS_TIMER       ((uint)0x00008000)
 
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1441,7 +1441,7 @@ fec_enet_rx_queue(struct net_device *nde
 			break;
 		pkt_received++;
 
-		writel(FEC_ENET_RXF, fep->hwp + FEC_IEVENT);
+		writel(FEC_ENET_RXF_GET(queue_id), fep->hwp + FEC_IEVENT);
 
 		/* Check for errors. */
 		status ^= BD_ENET_RX_LAST;

[PATCH 4.19 49/74] net, neigh: clear whole pneigh_entry at alloc time

[Greg Kroah-Hartman]

From: Eric Dumazet <edumazet@google.com>

commit e195e9b5dee6459d8c8e6a314cc71a644a0537fd upstream.

Commit 2c611ad97a82 ("net, neigh: Extend neigh->flags to 32 bit
to allow for extensions") enables a new KMSAM warning [1]

I think the bug is actually older, because the following intruction
only occurred if ndm->ndm_flags had NTF_PROXY set.

	pn->flags = ndm->ndm_flags;

Let's clear all pneigh_entry fields at alloc time.

[1]
BUG: KMSAN: uninit-value in pneigh_fill_info+0x986/0xb30 net/core/neighbour.c:2593
 pneigh_fill_info+0x986/0xb30 net/core/neighbour.c:2593
 pneigh_dump_table net/core/neighbour.c:2715 [inline]
 neigh_dump_info+0x1e3f/0x2c60 net/core/neighbour.c:2832
 netlink_dump+0xaca/0x16a0 net/netlink/af_netlink.c:2265
 __netlink_dump_start+0xd1c/0xee0 net/netlink/af_netlink.c:2370
 netlink_dump_start include/linux/netlink.h:254 [inline]
 rtnetlink_rcv_msg+0x181b/0x18c0 net/core/rtnetlink.c:5534
 netlink_rcv_skb+0x447/0x800 net/netlink/af_netlink.c:2491
 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5589
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x1095/0x1360 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x16f3/0x1870 net/netlink/af_netlink.c:1916
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 sock_write_iter+0x594/0x690 net/socket.c:1057
 call_write_iter include/linux/fs.h:2162 [inline]
 new_sync_write fs/read_write.c:503 [inline]
 vfs_write+0x1318/0x2030 fs/read_write.c:590
 ksys_write+0x28c/0x520 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0xdb/0x120 fs/read_write.c:652
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 slab_alloc_node mm/slub.c:3251 [inline]
 slab_alloc mm/slub.c:3259 [inline]
 __kmalloc+0xc3c/0x12d0 mm/slub.c:4437
 kmalloc include/linux/slab.h:595 [inline]
 pneigh_lookup+0x60f/0xd70 net/core/neighbour.c:766
 arp_req_set_public net/ipv4/arp.c:1016 [inline]
 arp_req_set+0x430/0x10a0 net/ipv4/arp.c:1032
 arp_ioctl+0x8d4/0xb60 net/ipv4/arp.c:1232
 inet_ioctl+0x4ef/0x820 net/ipv4/af_inet.c:947
 sock_do_ioctl net/socket.c:1118 [inline]
 sock_ioctl+0xa3f/0x13e0 net/socket.c:1235
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0x2df/0x4a0 fs/ioctl.c:860
 __x64_sys_ioctl+0xd8/0x110 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

CPU: 1 PID: 20001 Comm: syz-executor.0 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Fixes: 62dd93181aaa ("[IPV6] NDISC: Set per-entry is_router flag in Proxy NA.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Roopa Prabhu <roopa@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20211206165329.1049835-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/core/neighbour.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -635,7 +635,7 @@ struct pneigh_entry * pneigh_lookup(stru
 
 	ASSERT_RTNL();
 
-	n = kmalloc(sizeof(*n) + key_len, GFP_KERNEL);
+	n = kzalloc(sizeof(*n) + key_len, GFP_KERNEL);
 	if (!n)
 		goto out;
 

[PATCH 4.19 50/74] net/qla3xxx: fix an error code in ql_adapter_up()

[Greg Kroah-Hartman]

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

commit d17b9737c2bc09b4ac6caf469826e5a7ce3ffab7 upstream.

The ql_wait_for_drvr_lock() fails and returns false, then this
function should return an error code instead of returning success.

The other problem is that the success path prints an error message
netdev_err(ndev, "Releasing driver lock\n");  Delete that and
re-order the code a little to make it more clear.

Fixes: 5a4faa873782 ("[PATCH] qla3xxx NIC driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211207082416.GA16110@kili
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/qlogic/qla3xxx.c |   19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

--- a/drivers/net/ethernet/qlogic/qla3xxx.c
+++ b/drivers/net/ethernet/qlogic/qla3xxx.c
@@ -3496,20 +3496,19 @@ static int ql_adapter_up(struct ql3_adap
 
 	spin_lock_irqsave(&qdev->hw_lock, hw_flags);
 
-	err = ql_wait_for_drvr_lock(qdev);
-	if (err) {
-		err = ql_adapter_initialize(qdev);
-		if (err) {
-			netdev_err(ndev, "Unable to initialize adapter\n");
-			goto err_init;
-		}
-		netdev_err(ndev, "Releasing driver lock\n");
-		ql_sem_unlock(qdev, QL_DRVR_SEM_MASK);
-	} else {
+	if (!ql_wait_for_drvr_lock(qdev)) {
 		netdev_err(ndev, "Could not acquire driver lock\n");
+		err = -ENODEV;
 		goto err_lock;
 	}
 
+	err = ql_adapter_initialize(qdev);
+	if (err) {
+		netdev_err(ndev, "Unable to initialize adapter\n");
+		goto err_init;
+	}
+	ql_sem_unlock(qdev, QL_DRVR_SEM_MASK);
+
 	spin_unlock_irqrestore(&qdev->hw_lock, hw_flags);
 
 	set_bit(QL_ADAPTER_UP, &qdev->flags);

[PATCH 4.19 51/74] USB: gadget: detect too-big endpoint 0 requests

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 153a2d7e3350cc89d406ba2d35be8793a64c2038 upstream.

Sometimes USB hosts can ask for buffers that are too large from endpoint
0, which should not be allowed.  If this happens for OUT requests, stall
the endpoint, but for IN requests, trim the request size to the endpoint
buffer size.

Co-developed-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/gadget/composite.c    |   12 ++++++++++++
 drivers/usb/gadget/legacy/dbgp.c  |   13 +++++++++++++
 drivers/usb/gadget/legacy/inode.c |   16 +++++++++++++++-
 3 files changed, 40 insertions(+), 1 deletion(-)

--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1634,6 +1634,18 @@ composite_setup(struct usb_gadget *gadge
 	struct usb_function		*f = NULL;
 	u8				endp;
 
+	if (w_length > USB_COMP_EP0_BUFSIZ) {
+		if (ctrl->bRequestType == USB_DIR_OUT) {
+			goto done;
+		} else {
+			/* Cast away the const, we are going to overwrite on purpose. */
+			__le16 *temp = (__le16 *)&ctrl->wLength;
+
+			*temp = cpu_to_le16(USB_COMP_EP0_BUFSIZ);
+			w_length = USB_COMP_EP0_BUFSIZ;
+		}
+	}
+
 	/* partial re-init of the response message; the function or the
 	 * gadget might need to intercept e.g. a control-OUT completion
 	 * when we delegate to it.
--- a/drivers/usb/gadget/legacy/dbgp.c
+++ b/drivers/usb/gadget/legacy/dbgp.c
@@ -345,6 +345,19 @@ static int dbgp_setup(struct usb_gadget
 	void *data = NULL;
 	u16 len = 0;
 
+	if (length > DBGP_REQ_LEN) {
+		if (ctrl->bRequestType == USB_DIR_OUT) {
+			return err;
+		} else {
+			/* Cast away the const, we are going to overwrite on purpose. */
+			__le16 *temp = (__le16 *)&ctrl->wLength;
+
+			*temp = cpu_to_le16(DBGP_REQ_LEN);
+			length = DBGP_REQ_LEN;
+		}
+	}
+
+
 	if (request == USB_REQ_GET_DESCRIPTOR) {
 		switch (value>>8) {
 		case USB_DT_DEVICE:
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -109,6 +109,8 @@ enum ep0_state {
 /* enough for the whole queue: most events invalidate others */
 #define	N_EVENT			5
 
+#define RBUF_SIZE		256
+
 struct dev_data {
 	spinlock_t			lock;
 	refcount_t			count;
@@ -143,7 +145,7 @@ struct dev_data {
 	struct dentry			*dentry;
 
 	/* except this scratch i/o buffer for ep0 */
-	u8				rbuf [256];
+	u8				rbuf[RBUF_SIZE];
 };
 
 static inline void get_dev (struct dev_data *data)
@@ -1332,6 +1334,18 @@ gadgetfs_setup (struct usb_gadget *gadge
 	u16				w_value = le16_to_cpu(ctrl->wValue);
 	u16				w_length = le16_to_cpu(ctrl->wLength);
 
+	if (w_length > RBUF_SIZE) {
+		if (ctrl->bRequestType == USB_DIR_OUT) {
+			return value;
+		} else {
+			/* Cast away the const, we are going to overwrite on purpose. */
+			__le16 *temp = (__le16 *)&ctrl->wLength;
+
+			*temp = cpu_to_le16(RBUF_SIZE);
+			w_length = RBUF_SIZE;
+		}
+	}
+
 	spin_lock (&dev->lock);
 	dev->setup_abort = 0;
 	if (dev->state == STATE_DEV_UNCONNECTED) {

[PATCH 4.19 52/74] USB: gadget: zero allocate endpoint 0 buffers

[Greg Kroah-Hartman]

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 86ebbc11bb3f60908a51f3e41a17e3f477c2eaa3 upstream.

Under some conditions, USB gadget devices can show allocated buffer
contents to a host.  Fix this up by zero-allocating them so that any
extra data will all just be zeros.

Reported-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Tested-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/gadget/composite.c   |    2 +-
 drivers/usb/gadget/legacy/dbgp.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2159,7 +2159,7 @@ int composite_dev_prepare(struct usb_com
 	if (!cdev->req)
 		return -ENOMEM;
 
-	cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL);
+	cdev->req->buf = kzalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL);
 	if (!cdev->req->buf)
 		goto fail;
 
--- a/drivers/usb/gadget/legacy/dbgp.c
+++ b/drivers/usb/gadget/legacy/dbgp.c
@@ -137,7 +137,7 @@ static int dbgp_enable_ep_req(struct usb
 		goto fail_1;
 	}
 
-	req->buf = kmalloc(DBGP_REQ_LEN, GFP_KERNEL);
+	req->buf = kzalloc(DBGP_REQ_LEN, GFP_KERNEL);
 	if (!req->buf) {
 		err = -ENOMEM;
 		stp = 2;

[PATCH 4.19 53/74] usb: core: config: fix validation of wMaxPacketValue entries

[Greg Kroah-Hartman]

From: Pavel Hofman <pavel.hofman@ivitera.com>

commit 1a3910c80966e4a76b25ce812f6bea0ef1b1d530 upstream.

The checks performed by commit aed9d65ac327 ("USB: validate
wMaxPacketValue entries in endpoint descriptors") require that initial
value of the maxp variable contains both maximum packet size bits
(10..0) and multiple-transactions bits (12..11). However, the existing
code assings only the maximum packet size bits. This patch assigns all
bits of wMaxPacketSize to the variable.

Fixes: aed9d65ac327 ("USB: validate wMaxPacketValue entries in endpoint descriptors")
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-1-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/config.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -409,7 +409,7 @@ static int usb_parse_endpoint(struct dev
 	 * the USB-2 spec requires such endpoints to have wMaxPacketSize = 0
 	 * (see the end of section 5.6.3), so don't warn about them.
 	 */
-	maxp = usb_endpoint_maxp(&endpoint->desc);
+	maxp = le16_to_cpu(endpoint->desc.wMaxPacketSize);
 	if (maxp == 0 && !(usb_endpoint_xfer_isoc(d) && asnum == 0)) {
 		dev_warn(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid wMaxPacketSize 0\n",
 		    cfgno, inum, asnum, d->bEndpointAddress);

[PATCH 4.19 54/74] xhci: Remove CONFIG_USB_DEFAULT_PERSIST to prevent xHCI from runtime suspending

[Greg Kroah-Hartman]

From: Kai-Heng Feng <kai.heng.feng@canonical.com>

commit 811ae81320da53a5670c36970cefacca8519f90e upstream.

When the xHCI is quirked with XHCI_RESET_ON_RESUME, runtime resume
routine also resets the controller.

This is bad for USB drivers without reset_resume callback, because
there's no subsequent call of usb_dev_complete() ->
usb_resume_complete() to force rebinding the driver to the device. For
instance, btusb device stops working after xHCI controller is runtime
resumed, if the controlled is quirked with XHCI_RESET_ON_RESUME.

So always take XHCI_RESET_ON_RESUME into account to solve the issue.

Cc: <stable@vger.kernel.org>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20211210141735.1384209-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3810,7 +3810,6 @@ static void xhci_free_dev(struct usb_hcd
 	struct xhci_slot_ctx *slot_ctx;
 	int i, ret;
 
-#ifndef CONFIG_USB_DEFAULT_PERSIST
 	/*
 	 * We called pm_runtime_get_noresume when the device was attached.
 	 * Decrement the counter here to allow controller to runtime suspend
@@ -3818,7 +3817,6 @@ static void xhci_free_dev(struct usb_hcd
 	 */
 	if (xhci->quirks & XHCI_RESET_ON_RESUME)
 		pm_runtime_put_noidle(hcd->self.controller);
-#endif
 
 	ret = xhci_check_args(hcd, udev, NULL, 0, true, __func__);
 	/* If the host is halted due to driver unload, we still need to free the
@@ -3969,14 +3967,12 @@ int xhci_alloc_dev(struct usb_hcd *hcd,
 
 	xhci_debugfs_create_slot(xhci, slot_id);
 
-#ifndef CONFIG_USB_DEFAULT_PERSIST
 	/*
 	 * If resetting upon resume, we can't put the controller into runtime
 	 * suspend if there is a device attached.
 	 */
 	if (xhci->quirks & XHCI_RESET_ON_RESUME)
 		pm_runtime_get_noresume(hcd->self.controller);
-#endif
 
 	/* Is this a LS or FS device under a HS hub? */
 	/* Hub or peripherial? */

[PATCH 4.19 55/74] usb: core: config: using bit mask instead of individual bits

[Greg Kroah-Hartman]

From: Pavel Hofman <pavel.hofman@ivitera.com>

commit ca5737396927afd4d57b133fd2874bbcf3421cdb upstream.

Using standard USB_EP_MAXP_MULT_MASK instead of individual bits for
extracting multiple-transactions bits from wMaxPacketSize value.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-2-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/config.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -425,9 +425,9 @@ static int usb_parse_endpoint(struct dev
 		maxpacket_maxes = full_speed_maxpacket_maxes;
 		break;
 	case USB_SPEED_HIGH:
-		/* Bits 12..11 are allowed only for HS periodic endpoints */
+		/* Multiple-transactions bits are allowed only for HS periodic endpoints */
 		if (usb_endpoint_xfer_int(d) || usb_endpoint_xfer_isoc(d)) {
-			i = maxp & (BIT(12) | BIT(11));
+			i = maxp & USB_EP_MAXP_MULT_MASK;
 			maxp &= ~i;
 		}
 		/* fallthrough */

[PATCH 4.19 56/74] xhci: avoid race between disable slot command and host runtime suspend

[Greg Kroah-Hartman]

From: Mathias Nyman <mathias.nyman@linux.intel.com>

commit 7faac1953ed1f658f719cdf7bb7303fa5eef822c upstream.

Make xhci_disable_slot() synchronous, thus ensuring it, and
xhci_free_dev() calling it return after xHC controller completes
the disable slot command.

Otherwise the roothub and xHC host may runtime suspend, and clear the
command ring while the disable slot command is being processed.

This causes a command completion mismatch as the completion event can't
be mapped to the correct command.
Command ring gets out of sync and commands time out.
Driver finally assumes host is unresponsive and bails out.

usb 2-4: USB disconnect, device number 10
xhci_hcd 0000:00:0d.0: ERROR mismatched command completion event
...
xhci_hcd 0000:00:0d.0: xHCI host controller not responding, assume dead
xhci_hcd 0000:00:0d.0: HC died; cleaning up

Cc: <stable@vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20211210141735.1384209-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci-hub.c  |    1 +
 drivers/usb/host/xhci-ring.c |    1 -
 drivers/usb/host/xhci.c      |   22 +++++++++++++++-------
 3 files changed, 16 insertions(+), 8 deletions(-)

--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -625,6 +625,7 @@ static int xhci_enter_test_mode(struct x
 			continue;
 
 		retval = xhci_disable_slot(xhci, i);
+		xhci_free_virt_device(xhci, i);
 		if (retval)
 			xhci_err(xhci, "Failed to disable slot %d, %d. Enter test mode anyway\n",
 				 i, retval);
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1236,7 +1236,6 @@ static void xhci_handle_cmd_disable_slot
 	if (xhci->quirks & XHCI_EP_LIMIT_QUIRK)
 		/* Delete default control endpoint resources */
 		xhci_free_device_endpoint_resources(xhci, virt_dev, true);
-	xhci_free_virt_device(xhci, slot_id);
 }
 
 static void xhci_handle_cmd_config_ep(struct xhci_hcd *xhci, int slot_id,
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3836,9 +3836,8 @@ static void xhci_free_dev(struct usb_hcd
 	}
 	xhci_debugfs_remove_slot(xhci, udev->slot_id);
 	virt_dev->udev = NULL;
-	ret = xhci_disable_slot(xhci, udev->slot_id);
-	if (ret)
-		xhci_free_virt_device(xhci, udev->slot_id);
+	xhci_disable_slot(xhci, udev->slot_id);
+	xhci_free_virt_device(xhci, udev->slot_id);
 }
 
 int xhci_disable_slot(struct xhci_hcd *xhci, u32 slot_id)
@@ -3848,7 +3847,7 @@ int xhci_disable_slot(struct xhci_hcd *x
 	u32 state;
 	int ret = 0;
 
-	command = xhci_alloc_command(xhci, false, GFP_KERNEL);
+	command = xhci_alloc_command(xhci, true, GFP_KERNEL);
 	if (!command)
 		return -ENOMEM;
 
@@ -3871,6 +3870,15 @@ int xhci_disable_slot(struct xhci_hcd *x
 	}
 	xhci_ring_cmd_db(xhci);
 	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	wait_for_completion(command->completion);
+
+	if (command->status != COMP_SUCCESS)
+		xhci_warn(xhci, "Unsuccessful disable slot %u command, status %d\n",
+			  slot_id, command->status);
+
+	xhci_free_command(xhci, command);
+
 	return ret;
 }
 
@@ -3979,9 +3987,8 @@ int xhci_alloc_dev(struct usb_hcd *hcd,
 	return 1;
 
 disable_slot:
-	ret = xhci_disable_slot(xhci, udev->slot_id);
-	if (ret)
-		xhci_free_virt_device(xhci, udev->slot_id);
+	xhci_disable_slot(xhci, udev->slot_id);
+	xhci_free_virt_device(xhci, udev->slot_id);
 
 	return 0;
 }
@@ -4110,6 +4117,7 @@ static int xhci_setup_device(struct usb_
 
 		mutex_unlock(&xhci->mutex);
 		ret = xhci_disable_slot(xhci, udev->slot_id);
+		xhci_free_virt_device(xhci, udev->slot_id);
 		if (!ret)
 			xhci_alloc_dev(hcd, udev);
 		kfree(command->completion);

[PATCH 4.19 57/74] iio: trigger: Fix reference counting

[Greg Kroah-Hartman]

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

commit a827a4984664308f13599a0b26c77018176d0c7c upstream.

In viio_trigger_alloc() device_initialize() is used to set the initial
reference count of the trigger to 1. Then another get_device() is called on
trigger. This sets the reference count to 2 before the trigger is returned.

iio_trigger_free(), which is the matching API to viio_trigger_alloc(),
calls put_device() which decreases the reference count by 1. But the second
reference count acquired in viio_trigger_alloc() is never dropped.

As a result the iio_trigger_release() function is never called and the
memory associated with the trigger is never freed.

Since there is no reason for the trigger to start its lifetime with two
reference counts just remove the extra get_device() in
viio_trigger_alloc().

Fixes: 5f9c035cae18 ("staging:iio:triggers. Add a reference get to the core for triggers.")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20211024092700.6844-2-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/industrialio-trigger.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -549,7 +549,6 @@ static struct iio_trigger *viio_trigger_
 		irq_modify_status(trig->subirq_base + i,
 				  IRQ_NOREQUEST | IRQ_NOAUTOEN, IRQ_NOPROBE);
 	}
-	get_device(&trig->dev);
 
 	return trig;
 

[PATCH 4.19 58/74] iio: trigger: stm32-timer: fix MODULE_ALIAS

[Greg Kroah-Hartman]

From: Alyssa Ross <hi@alyssa.is>

commit 893621e0606747c5bbefcaf2794d12c7aa6212b7 upstream.

modprobe can't handle spaces in aliases.

Fixes: 93fbe91b5521 ("iio: Add STM32 timer trigger driver")
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Link: https://lore.kernel.org/r/20211125182850.2645424-1-hi@alyssa.is
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/trigger/stm32-timer-trigger.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/trigger/stm32-timer-trigger.c
+++ b/drivers/iio/trigger/stm32-timer-trigger.c
@@ -884,6 +884,6 @@ static struct platform_driver stm32_time
 };
 module_platform_driver(stm32_timer_trigger_driver);
 
-MODULE_ALIAS("platform: stm32-timer-trigger");
+MODULE_ALIAS("platform:stm32-timer-trigger");
 MODULE_DESCRIPTION("STMicroelectronics STM32 Timer Trigger driver");
 MODULE_LICENSE("GPL v2");

[PATCH 4.19 59/74] iio: stk3310: Dont return error code in interrupt handler

[Greg Kroah-Hartman]

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

commit 8e1eeca5afa7ba84d885987165dbdc5decf15413 upstream.

Interrupt handlers must return one of the irqreturn_t values. Returning a
error code is not supported.

The stk3310 event interrupt handler returns an error code when reading the
flags register fails.

Fix the implementation to always return an irqreturn_t value.

Fixes: 3dd477acbdd1 ("iio: light: Add threshold interrupt support for STK3310")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211024171251.22896-3-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/light/stk3310.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -545,9 +545,8 @@ static irqreturn_t stk3310_irq_event_han
 	mutex_lock(&data->lock);
 	ret = regmap_field_read(data->reg_flag_nf, &dir);
 	if (ret < 0) {
-		dev_err(&data->client->dev, "register read failed\n");
-		mutex_unlock(&data->lock);
-		return ret;
+		dev_err(&data->client->dev, "register read failed: %d\n", ret);
+		goto out;
 	}
 	event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1,
 				     IIO_EV_TYPE_THRESH,
@@ -559,6 +558,7 @@ static irqreturn_t stk3310_irq_event_han
 	ret = regmap_field_write(data->reg_flag_psint, 0);
 	if (ret < 0)
 		dev_err(&data->client->dev, "failed to reset interrupts\n");
+out:
 	mutex_unlock(&data->lock);
 
 	return IRQ_HANDLED;

[PATCH 4.19 60/74] iio: mma8452: Fix trigger reference couting

[Greg Kroah-Hartman]

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

commit cd0082235783f814241a1c9483fb89e405f4f892 upstream.

The mma8452 driver directly assigns a trigger to the struct iio_dev. The
IIO core when done using this trigger will call `iio_trigger_put()` to drop
the reference count by 1.

Without the matching `iio_trigger_get()` in the driver the reference count
can reach 0 too early, the trigger gets freed while still in use and a
use-after-free occurs.

Fix this by getting a reference to the trigger before assigning it to the
IIO device.

Fixes: ae6d9ce05691 ("iio: mma8452: Add support for interrupt driven triggers.")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211024092700.6844-1-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/accel/mma8452.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -1470,7 +1470,7 @@ static int mma8452_trigger_setup(struct
 	if (ret)
 		return ret;
 
-	indio_dev->trig = trig;
+	indio_dev->trig = iio_trigger_get(trig);
 
 	return 0;
 }

[PATCH 4.19 61/74] iio: ltr501: Dont return error code in trigger handler

[Greg Kroah-Hartman]

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

commit ef9d67fa72c1b149a420587e435a3e888bdbf74f upstream.

IIO trigger handlers need to return one of the irqreturn_t values.
Returning an error code is not supported.

The ltr501 interrupt handler gets this right for most error paths, but
there is one case where it returns the error code.

In addition for this particular case the trigger handler does not call
`iio_trigger_notify_done()`. Which when not done keeps the triggered
disabled forever.

Modify the code so that the function returns a valid irqreturn_t value as
well as calling `iio_trigger_notify_done()` on all exit paths.

Fixes: 2690be905123 ("iio: Add Lite-On ltr501 ambient light / proximity sensor driver")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211024171251.22896-1-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/light/ltr501.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/light/ltr501.c
+++ b/drivers/iio/light/ltr501.c
@@ -1275,7 +1275,7 @@ static irqreturn_t ltr501_trigger_handle
 		ret = regmap_bulk_read(data->regmap, LTR501_ALS_DATA1,
 				       (u8 *)als_buf, sizeof(als_buf));
 		if (ret < 0)
-			return ret;
+			goto done;
 		if (test_bit(0, indio_dev->active_scan_mask))
 			scan.channels[j++] = le16_to_cpu(als_buf[1]);
 		if (test_bit(1, indio_dev->active_scan_mask))

[PATCH 4.19 62/74] iio: kxsd9: Dont return error code in trigger handler

[Greg Kroah-Hartman]

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

commit 45febe0d63917ee908198c5be08511c64ee1790a upstream.

IIO trigger handlers need to return one of the irqreturn_t values.
Returning an error code is not supported.

The kxsd9 interrupt handler returns an error code if reading the data
registers fails. In addition when exiting due to an error the trigger
handler does not call `iio_trigger_notify_done()`. Which when not done
keeps the triggered disabled forever.

Modify the code so that the function returns a valid irqreturn_t value as
well as calling `iio_trigger_notify_done()` on all exit paths.

Since we can't return the error code make sure to at least log it as part
of the error message.

Fixes: 0427a106a98a ("iio: accel: kxsd9: Add triggered buffer handling")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20211024171251.22896-2-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/accel/kxsd9.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/iio/accel/kxsd9.c
+++ b/drivers/iio/accel/kxsd9.c
@@ -227,14 +227,14 @@ static irqreturn_t kxsd9_trigger_handler
 			       hw_values.chan,
 			       sizeof(hw_values.chan));
 	if (ret) {
-		dev_err(st->dev,
-			"error reading data\n");
-		return ret;
+		dev_err(st->dev, "error reading data: %d\n", ret);
+		goto out;
 	}
 
 	iio_push_to_buffers_with_timestamp(indio_dev,
 					   &hw_values,
 					   iio_get_time_ns(indio_dev));
+out:
 	iio_trigger_notify_done(indio_dev->trig);
 
 	return IRQ_HANDLED;

[PATCH 4.19 63/74] iio: itg3200: Call iio_trigger_notify_done() on error

[Greg Kroah-Hartman]

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

commit 67fe29583e72b2103abb661bb58036e3c1f00277 upstream.

IIO trigger handlers must call iio_trigger_notify_done() when done. This
must be done even when an error occurred. Otherwise the trigger will be
seen as busy indefinitely and the trigger handler will never be called
again.

The itg3200 driver neglects to call iio_trigger_notify_done() when there is
an error reading the gyro data. Fix this by making sure that
iio_trigger_notify_done() is included in the error exit path.

Fixes: 9dbf091da080 ("iio: gyro: Add itg3200")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211101144055.13858-1-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/gyro/itg3200_buffer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/gyro/itg3200_buffer.c
+++ b/drivers/iio/gyro/itg3200_buffer.c
@@ -64,9 +64,9 @@ static irqreturn_t itg3200_trigger_handl
 
 	iio_push_to_buffers_with_timestamp(indio_dev, &scan, pf->timestamp);
 
+error_ret:
 	iio_trigger_notify_done(indio_dev->trig);
 
-error_ret:
 	return IRQ_HANDLED;
 }
 

[PATCH 4.19 64/74] iio: dln2-adc: Fix lockdep complaint

[Greg Kroah-Hartman]

From: Noralf Trønnes <noralf@tronnes.org>

commit 59f92868176f191eefde70d284bdfc1ed76a84bc upstream.

When reading the voltage:

$ cat /sys/bus/iio/devices/iio\:device0/in_voltage0_raw

Lockdep complains:

[  153.910616] ======================================================
[  153.916918] WARNING: possible circular locking dependency detected
[  153.923221] 5.14.0+ #5 Not tainted
[  153.926692] ------------------------------------------------------
[  153.932992] cat/717 is trying to acquire lock:
[  153.937525] c2585358 (&indio_dev->mlock){+.+.}-{3:3}, at: iio_device_claim_direct_mode+0x28/0x44
[  153.946541]
               but task is already holding lock:
[  153.952487] c2585860 (&dln2->mutex){+.+.}-{3:3}, at: dln2_adc_read_raw+0x94/0x2bc [dln2_adc]
[  153.961152]
               which lock already depends on the new lock.

Fix this by not calling into the iio core underneath the dln2->mutex lock.

Fixes: 7c0299e879dd ("iio: adc: Add support for DLN2 ADC")
Cc: Jack Andersen <jackoalan@gmail.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://lore.kernel.org/r/20211018113731.25723-1-noralf@tronnes.org
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/adc/dln2-adc.c |   15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

--- a/drivers/iio/adc/dln2-adc.c
+++ b/drivers/iio/adc/dln2-adc.c
@@ -251,7 +251,6 @@ static int dln2_adc_set_chan_period(stru
 static int dln2_adc_read(struct dln2_adc *dln2, unsigned int channel)
 {
 	int ret, i;
-	struct iio_dev *indio_dev = platform_get_drvdata(dln2->pdev);
 	u16 conflict;
 	__le16 value;
 	int olen = sizeof(value);
@@ -260,13 +259,9 @@ static int dln2_adc_read(struct dln2_adc
 		.chan = channel,
 	};
 
-	ret = iio_device_claim_direct_mode(indio_dev);
-	if (ret < 0)
-		return ret;
-
 	ret = dln2_adc_set_chan_enabled(dln2, channel, true);
 	if (ret < 0)
-		goto release_direct;
+		return ret;
 
 	ret = dln2_adc_set_port_enabled(dln2, true, &conflict);
 	if (ret < 0) {
@@ -303,8 +298,6 @@ disable_port:
 	dln2_adc_set_port_enabled(dln2, false, NULL);
 disable_chan:
 	dln2_adc_set_chan_enabled(dln2, channel, false);
-release_direct:
-	iio_device_release_direct_mode(indio_dev);
 
 	return ret;
 }
@@ -340,10 +333,16 @@ static int dln2_adc_read_raw(struct iio_
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
+		ret = iio_device_claim_direct_mode(indio_dev);
+		if (ret < 0)
+			return ret;
+
 		mutex_lock(&dln2->mutex);
 		ret = dln2_adc_read(dln2, chan->channel);
 		mutex_unlock(&dln2->mutex);
 
+		iio_device_release_direct_mode(indio_dev);
+
 		if (ret < 0)
 			return ret;
 

[PATCH 4.19 65/74] iio: dln2: Check return value of devm_iio_trigger_register()

[Greg Kroah-Hartman]

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

commit 90751fb9f224e0e1555b49a8aa9e68f6537e4cec upstream.

Registering a trigger can fail and the return value of
devm_iio_trigger_register() must be checked. Otherwise undefined behavior
can occur when the trigger is used.

Fixes: 7c0299e879dd ("iio: adc: Add support for DLN2 ADC")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211101133043.6974-1-lars@metafoo.de
Cc: <stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/adc/dln2-adc.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/iio/adc/dln2-adc.c
+++ b/drivers/iio/adc/dln2-adc.c
@@ -668,7 +668,11 @@ static int dln2_adc_probe(struct platfor
 		return -ENOMEM;
 	}
 	iio_trigger_set_drvdata(dln2->trig, dln2);
-	devm_iio_trigger_register(dev, dln2->trig);
+	ret = devm_iio_trigger_register(dev, dln2->trig);
+	if (ret) {
+		dev_err(dev, "failed to register trigger: %d\n", ret);
+		return ret;
+	}
 	iio_trigger_set_immutable(indio_dev, dln2->trig);
 
 	ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,

[PATCH 4.19 66/74] iio: at91-sama5d2: Fix incorrect sign extension

[Greg Kroah-Hartman]

From: Gwendal Grignou <gwendal@chromium.org>

commit 652e7df485c6884d552085ae2c73efa6cfea3547 upstream.

Use scan_type when processing raw data which also fixes that the sign
extension was from the wrong bit.

Use channel definition as root of trust and replace constant
when reading elements directly using the raw sysfs attributes.

Fixes: 6794e23fa3fe ("iio: adc: at91-sama5d2_adc: add support for oversampling resolution")
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Eugen Hristev <eugen.hristev@microchip.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211104082413.3681212-9-gwendal@chromium.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/adc/at91-sama5d2_adc.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1375,7 +1375,8 @@ static int at91_adc_read_info_raw(struct
 		*val = st->conversion_value;
 		ret = at91_adc_adjust_val_osr(st, val);
 		if (chan->scan_type.sign == 's')
-			*val = sign_extend32(*val, 11);
+			*val = sign_extend32(*val,
+					     chan->scan_type.realbits - 1);
 		st->conversion_done = false;
 	}
 

[PATCH 4.19 67/74] iio: adc: axp20x_adc: fix charging current reporting on AXP22x

[Greg Kroah-Hartman]

From: Evgeny Boger <boger@wirenboard.com>

commit 92beafb76a31bdc02649eb44e93a8e4f4cfcdbe8 upstream.

Both the charging and discharging currents on AXP22x are stored as
12-bit integers, in accordance with the datasheet.
It's also confirmed by vendor BSP (axp20x_adc.c:axp22_icharge_to_mA).

The scale factor of 0.5 is never mentioned in datasheet, nor in the
vendor source code. I think it was here to compensate for
erroneous addition bit in register width.

Tested on custom A40i+AXP221s board with external ammeter as
a reference.

Fixes: 0e34d5de961d ("iio: adc: add support for X-Powers AXP20X and AXP22X PMICs ADCs")
Signed-off-by: Evgeny Boger <boger@wirenboard.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20211116213746.264378-1-boger@wirenboard.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/adc/axp20x_adc.c |   18 +++---------------
 1 file changed, 3 insertions(+), 15 deletions(-)

--- a/drivers/iio/adc/axp20x_adc.c
+++ b/drivers/iio/adc/axp20x_adc.c
@@ -254,19 +254,8 @@ static int axp22x_adc_raw(struct iio_dev
 			  struct iio_chan_spec const *chan, int *val)
 {
 	struct axp20x_adc_iio *info = iio_priv(indio_dev);
-	int size;
 
-	/*
-	 * N.B.: Unlike the Chinese datasheets tell, the charging current is
-	 * stored on 12 bits, not 13 bits. Only discharging current is on 13
-	 * bits.
-	 */
-	if (chan->type == IIO_CURRENT && chan->channel == AXP22X_BATT_DISCHRG_I)
-		size = 13;
-	else
-		size = 12;
-
-	*val = axp20x_read_variable_width(info->regmap, chan->address, size);
+	*val = axp20x_read_variable_width(info->regmap, chan->address, 12);
 	if (*val < 0)
 		return *val;
 
@@ -389,9 +378,8 @@ static int axp22x_adc_scale(struct iio_c
 		return IIO_VAL_INT_PLUS_MICRO;
 
 	case IIO_CURRENT:
-		*val = 0;
-		*val2 = 500000;
-		return IIO_VAL_INT_PLUS_MICRO;
+		*val = 1;
+		return IIO_VAL_INT;
 
 	case IIO_TEMP:
 		*val = 100;

[PATCH 4.19 68/74] iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove

[Greg Kroah-Hartman]

From: Yang Yingliang <yangyingliang@huawei.com>

commit 70c9774e180d151abaab358108e3510a8e615215 upstream.

When ACPI type is ACPI_SMO8500, the data->dready_trig will not be set, the
memory allocated by iio_triggered_buffer_setup() will not be freed, and cause
memory leak as follows:

unreferenced object 0xffff888009551400 (size 512):
  comm "i2c-SMO8500-125", pid 911, jiffies 4294911787 (age 83.852s)
  hex dump (first 32 bytes):
    02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 20 e2 e5 c0 ff ff ff ff  ........ .......
  backtrace:
    [<0000000041ce75ee>] kmem_cache_alloc_trace+0x16d/0x360
    [<000000000aeb17b0>] iio_kfifo_allocate+0x41/0x130 [kfifo_buf]
    [<000000004b40c1f5>] iio_triggered_buffer_setup_ext+0x2c/0x210 [industrialio_triggered_buffer]
    [<000000004375b15f>] kxcjk1013_probe+0x10c3/0x1d81 [kxcjk_1013]

Fix it by remove data->dready_trig condition in probe and remove.

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: a25691c1f967 ("iio: accel: kxcjk1013: allow using an external trigger")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Cc: <Stable@vger.kernel.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211025124159.2700301-1-yangyingliang@huawei.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/accel/kxcjk-1013.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/iio/accel/kxcjk-1013.c
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -1423,8 +1423,7 @@ static int kxcjk1013_probe(struct i2c_cl
 	return 0;
 
 err_buffer_cleanup:
-	if (data->dready_trig)
-		iio_triggered_buffer_cleanup(indio_dev);
+	iio_triggered_buffer_cleanup(indio_dev);
 err_trigger_unregister:
 	if (data->dready_trig)
 		iio_trigger_unregister(data->dready_trig);
@@ -1447,8 +1446,8 @@ static int kxcjk1013_remove(struct i2c_c
 	pm_runtime_set_suspended(&client->dev);
 	pm_runtime_put_noidle(&client->dev);
 
+	iio_triggered_buffer_cleanup(indio_dev);
 	if (data->dready_trig) {
-		iio_triggered_buffer_cleanup(indio_dev);
 		iio_trigger_unregister(data->dready_trig);
 		iio_trigger_unregister(data->motion_trig);
 	}

[PATCH 4.19 69/74] irqchip/armada-370-xp: Fix return value of armada_370_xp_msi_alloc()

[Greg Kroah-Hartman]

From: Pali Rohár <pali@kernel.org>

commit ce20eff57361e72878a772ef08b5239d3ae102b6 upstream.

IRQ domain alloc function should return zero on success. Non-zero value
indicates failure.

Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: fcc392d501bd ("irqchip/armada-370-xp: Use the generic MSI infrastructure")
Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211125130057.26705-1-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/irqchip/irq-armada-370-xp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -250,7 +250,7 @@ static int armada_370_xp_msi_alloc(struc
 				    NULL, NULL);
 	}
 
-	return hwirq;
+	return 0;
 }
 
 static void armada_370_xp_msi_free(struct irq_domain *domain,

[PATCH 4.19 70/74] irqchip/armada-370-xp: Fix support for Multi-MSI interrupts

[Greg Kroah-Hartman]

From: Pali Rohár <pali@kernel.org>

commit d0a553502efd545c1ce3fd08fc4d423f8e4ac3d6 upstream.

irq-armada-370-xp driver already sets MSI_FLAG_MULTI_PCI_MSI flag into
msi_domain_info structure. But allocated interrupt numbers for Multi-MSI
needs to be properly aligned otherwise devices send MSI interrupt with
wrong number.

Fix this issue by using function bitmap_find_free_region() instead of
bitmap_find_next_zero_area() to allocate aligned interrupt numbers.

Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: a71b9412c90c ("irqchip/armada-370-xp: Allow allocation of multiple MSIs")
Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211125130057.26705-2-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/irqchip/irq-armada-370-xp.c |   14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -232,16 +232,12 @@ static int armada_370_xp_msi_alloc(struc
 	int hwirq, i;
 
 	mutex_lock(&msi_used_lock);
+	hwirq = bitmap_find_free_region(msi_used, PCI_MSI_DOORBELL_NR,
+					order_base_2(nr_irqs));
+	mutex_unlock(&msi_used_lock);
 
-	hwirq = bitmap_find_next_zero_area(msi_used, PCI_MSI_DOORBELL_NR,
-					   0, nr_irqs, 0);
-	if (hwirq >= PCI_MSI_DOORBELL_NR) {
-		mutex_unlock(&msi_used_lock);
+	if (hwirq < 0)
 		return -ENOSPC;
-	}
-
-	bitmap_set(msi_used, hwirq, nr_irqs);
-	mutex_unlock(&msi_used_lock);
 
 	for (i = 0; i < nr_irqs; i++) {
 		irq_domain_set_info(domain, virq + i, hwirq + i,
@@ -259,7 +255,7 @@ static void armada_370_xp_msi_free(struc
 	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
 
 	mutex_lock(&msi_used_lock);
-	bitmap_clear(msi_used, d->hwirq, nr_irqs);
+	bitmap_release_region(msi_used, d->hwirq, order_base_2(nr_irqs));
 	mutex_unlock(&msi_used_lock);
 }
 

[PATCH 4.19 71/74] irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL

[Greg Kroah-Hartman]

From: Wudi Wang <wangwudi@hisilicon.com>

commit b383a42ca523ce54bcbd63f7c8f3cf974abc9b9a upstream.

INVALL CMD specifies that the ITS must ensure any caching associated with
the interrupt collection defined by ICID is consistent with the LPI
configuration tables held in memory for all Redistributors. SYNC is
required to ensure that INVALL is executed.

Currently, LPI configuration data may be inconsistent with that in the
memory within a short period of time after the INVALL command is executed.

Signed-off-by: Wudi Wang <wangwudi@hisilicon.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Fixes: cc2d3216f53c ("irqchip: GICv3: ITS command queue")
Link: https://lore.kernel.org/r/20211208015429.5007-1-zhangshaokun@hisilicon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/irqchip/irq-gic-v3-its.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -581,7 +581,7 @@ static struct its_collection *its_build_
 
 	its_fixup_cmd(cmd);
 
-	return NULL;
+	return desc->its_invall_cmd.col;
 }
 
 static struct its_vpe *its_build_vinvall_cmd(struct its_node *its,

[PATCH 4.19 72/74] irqchip: nvic: Fix offset for Interrupt Priority Offsets

[Greg Kroah-Hartman]

From: Vladimir Murzin <vladimir.murzin@arm.com>

commit c5e0cbe2858d278a27d5b3fe31890aea5be064c4 upstream.

According to ARM(v7M) ARM Interrupt Priority Offsets located at
0xE000E400-0xE000E5EC, while 0xE000E300-0xE000E33C covers read-only
Interrupt Active Bit Registers

Fixes: 292ec080491d ("irqchip: Add support for ARMv7-M NVIC")
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211201110259.84857-1-vladimir.murzin@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/irqchip/irq-nvic.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/irqchip/irq-nvic.c
+++ b/drivers/irqchip/irq-nvic.c
@@ -29,7 +29,7 @@
 
 #define NVIC_ISER		0x000
 #define NVIC_ICER		0x080
-#define NVIC_IPR		0x300
+#define NVIC_IPR		0x400
 
 #define NVIC_MAX_BANKS		16
 /*

[PATCH 4.19 73/74] net_sched: fix a crash in tc_new_tfilter()

[Greg Kroah-Hartman]

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

commit 460b360104d51552a57f39e54b2589c9fd7fa0b3 upstream.

When tcf_block_find() fails, it already rollbacks the qdisc refcnt,
so its caller doesn't need to clean up this again. Avoid calling
qdisc_put() again by resetting qdisc to NULL for callers.

Reported-by: syzbot+37b8770e6d5a8220a039@syzkaller.appspotmail.com
Fixes: e368fdb61d8e ("net: sched: use Qdisc rcu API instead of relying on rtnl lock")
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/cls_api.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -629,8 +629,10 @@ static struct tcf_block *tcf_block_find(
 errout_rcu:
 	rcu_read_unlock();
 errout_qdisc:
-	if (*q)
+	if (*q) {
 		qdisc_put(*q);
+		*q = NULL;
+	}
 	return ERR_PTR(err);
 }
 

[PATCH 4.19 74/74] net: sched: make function qdisc_free_cb() static

[Greg Kroah-Hartman]

From: Wei Yongjun <weiyongjun1@huawei.com>

commit 5362700c942b2cc4bab328361545a6d6fe649534 upstream.

Fixes the following sparse warning:

net/sched/sch_generic.c:944:6: warning:
 symbol 'qdisc_free_cb' was not declared. Should it be static?

Fixes: 3a7d0d07a386 ("net: sched: extend Qdisc with rcu")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/sch_generic.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -958,7 +958,7 @@ void qdisc_free(struct Qdisc *qdisc)
 	kfree((char *) qdisc - qdisc->padded);
 }
 
-void qdisc_free_cb(struct rcu_head *head)
+static void qdisc_free_cb(struct rcu_head *head)
 {
 	struct Qdisc *q = container_of(head, struct Qdisc, rcu);
 

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Pavel Machek]

[-- Attachment #1: Type: text/plain, Size: 661 bytes --]

Hi!

> This is the start of the stable review cycle for the 4.19.221 release.
> There are 74 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.

CIP testing did not find any problems here:

https://gitlab.com/cip-project/cip-testing/linux-stable-rc-ci/-/tree/linux-4.19.y

Tested-by: Pavel Machek (CIP) <pavel@denx.de>

Best regards,
                                                                Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 195 bytes --]

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Jon Hunter]

On Mon, 13 Dec 2021 10:29:31 +0100, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.19.221 release.
> There are 74 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Dec 2021 09:29:16 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.221-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

All tests passing for Tegra ...

Test results for stable-v4.19:
    10 builds:	10 pass, 0 fail
    22 boots:	22 pass, 0 fail
    40 tests:	40 pass, 0 fail

Linux version:	4.19.221-rc1-gc65e8cddade7
Boards tested:	tegra124-jetson-tk1, tegra186-p2771-0000,
                tegra194-p2972-0000, tegra20-ventana,
                tegra210-p2371-2180, tegra30-cardhu-a04

Tested-by: Jon Hunter <jonathanh@nvidia.com>

Jon

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Sudip Mukherjee]

HI Greg,

On Mon, Dec 13, 2021 at 9:51 AM Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 4.19.221 release.
> There are 74 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Dec 2021 09:29:16 +0000.
> Anything received after that time might be too late.

Just an initial report. mips allmodconfig is failing with the following error.

drivers/spi/spi-sh-msiof.c:78: warning: "STR" redefined
   78 | #define STR     0x40    /* Status Register */
      |
In file included from ./arch/mips/include/asm/mach-generic/spaces.h:15,
                 from ./arch/mips/include/asm/addrspace.h:13,
                 from ./arch/mips/include/asm/barrier.h:11,
                 from ./include/linux/compiler.h:320,
                 from ./arch/mips/include/asm/bitops.h:16,
                 from ./include/linux/bitops.h:19,
                 from ./include/linux/bitmap.h:8,
                 from drivers/spi/spi-sh-msiof.c:14:
./arch/mips/include/asm/mipsregs.h:30: note: this is the location of
the previous definition
   30 | #define STR(x) __STR(x)
      |
In file included from ./arch/mips/include/asm/sibyte/sb1250.h:41,
                 from drivers/watchdog/sb_wdog.c:58:
./arch/mips/include/asm/sibyte/bcm1480_scd.h:274: warning:
"M_SPC_CFG_CLEAR" redefined
  274 | #define M_SPC_CFG_CLEAR                 M_BCM1480_SPC_CFG_CLEAR
      |
In file included from ./arch/mips/include/asm/sibyte/sb1250.h:40,
                 from drivers/watchdog/sb_wdog.c:58:
./arch/mips/include/asm/sibyte/sb1250_scd.h:405: note: this is the
location of the previous definition
  405 | #define M_SPC_CFG_CLEAR         _SB_MAKEMASK1(32)
      |
In file included from ./arch/mips/include/asm/sibyte/sb1250.h:41,
                 from drivers/watchdog/sb_wdog.c:58:
./arch/mips/include/asm/sibyte/bcm1480_scd.h:275: warning:
"M_SPC_CFG_ENABLE" redefined
  275 | #define M_SPC_CFG_ENABLE                M_BCM1480_SPC_CFG_ENABLE
      |
In file included from ./arch/mips/include/asm/sibyte/sb1250.h:40,
                 from drivers/watchdog/sb_wdog.c:58:
./arch/mips/include/asm/sibyte/sb1250_scd.h:406: note: this is the
location of the previous definition
  406 | #define M_SPC_CFG_ENABLE        _SB_MAKEMASK1(33)
      |
/src/gcc-10/bin/mips-linux-ld:
arch/mips/boot/dts/mscc/ocelot_pcb123.dtb.o: in function
`__dtb_ocelot_pcb123_begin':
(.dtb.init.rodata+0x0): multiple definition of
`__dtb_ocelot_pcb123_begin';
arch/mips/boot/dts/mscc/ocelot_pcb123.dtb.o:(.dtb.init.rodata+0x0):
first defined here
/src/gcc-10/bin/mips-linux-ld:
arch/mips/boot/dts/mscc/ocelot_pcb123.dtb.o: in function
`__dtb_ocelot_pcb123_end':
(.dtb.init.rodata+0x1003): multiple definition of
`__dtb_ocelot_pcb123_end';
arch/mips/boot/dts/mscc/ocelot_pcb123.dtb.o:(.dtb.init.rodata+0x1003):
first defined here
/src/gcc-10/bin/mips-linux-ld: arch/mips/boot/dts/mti/sead3.dtb.o: in
function `__dtb_sead3_begin':
(.dtb.init.rodata+0x0): multiple definition of `__dtb_sead3_begin';
arch/mips/boot/dts/mti/sead3.dtb.o:(.dtb.init.rodata+0x0): first
defined here
/src/gcc-10/bin/mips-linux-ld: arch/mips/boot/dts/mti/sead3.dtb.o: in
function `__dtb_sead3_end':
(.dtb.init.rodata+0x100b): multiple definition of `__dtb_sead3_end';
arch/mips/boot/dts/mti/sead3.dtb.o:(.dtb.init.rodata+0x100b): first
defined here
make: *** [Makefile:1046: vmlinux] Error 1


-- 
Regards
Sudip

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Sudip Mukherjee]

On Mon, Dec 13, 2021 at 4:27 PM Sudip Mukherjee
<sudipm.mukherjee@gmail.com> wrote:
>
> HI Greg,
>
> On Mon, Dec 13, 2021 at 9:51 AM Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > This is the start of the stable review cycle for the 4.19.221 release.
> > There are 74 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> >
> > Responses should be made by Wed, 15 Dec 2021 09:29:16 +0000.
> > Anything received after that time might be too late.
>
> Just an initial report. mips allmodconfig is failing with the following error.

Ignore this please. I am not seeing the error on a clean build. Need
to check what went wrong with my build script.


-- 
Regards
Sudip

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Linus Torvalds]

On Mon, Dec 13, 2021 at 10:59 AM Sudip Mukherjee
<sudipm.mukherjee@gmail.com> wrote:
>
> >
> > Just an initial report. mips allmodconfig is failing with the following error.
>
> Ignore this please. I am not seeing the error on a clean build. Need
> to check what went wrong with my build script.

The gcc plugin builds often fail if there's been a gcc version update,
and you need to blow the old plugins away.

We do not have the full dependencies for system tools, and that might
happen with other incompatible system updates too.

But practically speaking, the gcc plugins are the only thing in the
kernel build that regularly cause problems.

             Linus

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Guenter Roeck]

On Mon, Dec 13, 2021 at 10:29:31AM +0100, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.19.221 release.  There
> are 74 patches in this series, all will be posted as a response to this one.
> If anyone has any issues with these being applied, please let me know.
> 
> Responses should be made by Wed, 15 Dec 2021 09:29:16 +0000.  Anything
> received after that time might be too late.
> 

Build results:
	total: 155 pass: 155 fail: 0
Qemu test results:
	total: 422 pass: 422 fail: 0

Tested-by: Guenter Roeck <linux@roeck-us.net>

Guenter

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Shuah Khan]

On 12/13/21 2:29 AM, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.19.221 release.
> There are 74 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Dec 2021 09:29:16 +0000.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.221-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h
> 

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

Tested-by: Shuah Khan <skhan@linuxfoundation.org>

thanks,
-- Shuah

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Sudip Mukherjee]

On Mon, Dec 13, 2021 at 7:06 PM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> On Mon, Dec 13, 2021 at 10:59 AM Sudip Mukherjee
> <sudipm.mukherjee@gmail.com> wrote:
> >
> > >
> > > Just an initial report. mips allmodconfig is failing with the following error.
> >
> > Ignore this please. I am not seeing the error on a clean build. Need
> > to check what went wrong with my build script.
>
> The gcc plugin builds often fail if there's been a gcc version update,
> and you need to blow the old plugins away.

I have not changed my gcc since 20211112.
And, I also have "scripts/config -d GCC_PLUGINS" as part of my build script.
Anyway, I will trigger my build for v4.19.221-rc1 again to verify.


-- 
Regards
Sudip

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Naresh Kamboju]

On Mon, 13 Dec 2021 at 15:09, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 4.19.221 release.
> There are 74 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 15 Dec 2021 09:29:16 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
>         https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.19.221-rc1.gz
> or in the git tree and branch at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h

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

Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>


NOTE:
Following warnings noticed on x86_64 and i386 with defconfig
building with gcc-8/9/10/11 and clang-11/12/13 and nightly.

make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/current ARCH=x86_64
CROSS_COMPILE=x86_64-linux-gnu- 'CC=sccache x86_64-linux-gnu-gcc'
'HOSTCC=sccache gcc' defconfig

WARNING: unmet direct dependencies detected for ARCH_USE_MEMREMAP_PROT
  Depends on [n]: AMD_MEM_ENCRYPT [=n]
  Selected by [y]:
  - EFI [=y] && ACPI [=y]

WARNING: unmet direct dependencies detected for ARCH_USE_MEMREMAP_PROT
  Depends on [n]: AMD_MEM_ENCRYPT [=n]
  Selected by [y]:
  - EFI [=y] && ACPI [=y]

build link,
https://builds.tuxbuild.com/22E1yyBLiIA9rwo90Cee5hMgOPR/


## Build
* kernel: 4.19.221-rc1
* git: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
* git branch: linux-4.19.y
* git commit: c65e8cddade7ba91d6b7438b4746b7b02a83bb72
* git describe: v4.19.220-75-gc65e8cddade7
* test details:
https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-4.19.y/build/v4.19.220-75-gc65e8cddade7

## No Test Regressions (compared to v4.19.220)

## No Test Fixes (compared to v4.19.220)

## Test result summary
total: 81020, pass: 65995, fail: 642, skip: 12539, xfail: 1844

## Build Summary
* arm: 254 total, 186 passed, 68 failed
* arm64: 35 total, 35 passed, 0 failed
* dragonboard-410c: 1 total, 1 passed, 0 failed
* hi6220-hikey: 1 total, 1 passed, 0 failed
* i386: 19 total, 19 passed, 0 failed
* juno-r2: 1 total, 1 passed, 0 failed
* mips: 26 total, 26 passed, 0 failed
* powerpc: 52 total, 0 passed, 52 failed
* s390: 12 total, 12 passed, 0 failed
* sparc: 12 total, 12 passed, 0 failed
* x15: 1 total, 1 passed, 0 failed
* x86: 1 total, 1 passed, 0 failed
* x86_64: 34 total, 34 passed, 0 failed

## Test suites summary
* fwts
* igt-gpu-tools
* kselftest-android
* kselftest-arm64
* kselftest-arm64/arm64.btitest.bti_c_func
* kselftest-arm64/arm64.btitest.bti_j_func
* kselftest-arm64/arm64.btitest.bti_jc_func
* kselftest-arm64/arm64.btitest.bti_none_func
* kselftest-arm64/arm64.btitest.nohint_func
* kselftest-arm64/arm64.btitest.paciasp_func
* kselftest-arm64/arm64.nobtitest.bti_c_func
* kselftest-arm64/arm64.nobtitest.bti_j_func
* kselftest-arm64/arm64.nobtitest.bti_jc_func
* kselftest-arm64/arm64.nobtitest.bti_none_func
* kselftest-arm64/arm64.nobtitest.nohint_func
* kselftest-arm64/arm64.nobtitest.paciasp_func
* kselftest-bpf
* kselftest-breakpoints
* kselftest-capabilities
* kselftest-cgroup
* kselftest-clone3
* kselftest-core
* kselftest-cpu-hotplug
* kselftest-cpufreq
* kselftest-drivers
* kselftest-efivarfs
* kselftest-filesystems
* kselftest-firmware
* kselftest-fpu
* kselftest-futex
* kselftest-gpio
* kselftest-intel_pstate
* kselftest-ipc
* kselftest-ir
* kselftest-kcmp
* kselftest-kexec
* kselftest-kvm
* kselftest-lib
* kselftest-livepatch
* kselftest-membarrier
* kselftest-memfd
* kselftest-memory-hotplug
* kselftest-mincore
* kselftest-mount
* kselftest-mqueue
* kselftest-net
* kselftest-netfilter
* kselftest-nsfs
* kselftest-openat2
* kselftest-pid_namespace
* kselftest-pidfd
* kselftest-proc
* kselftest-pstore
* kselftest-ptrace
* kselftest-rseq
* kselftest-rtc
* kselftest-seccomp
* kselftest-sigaltstack
* kselftest-size
* kselftest-splice
* kselftest-static_keys
* kselftest-sync
* kselftest-sysctl
* kselftest-tc-testing
* kselftest-timens
* kselftest-timers
* kselftest-tmpfs
* kselftest-tpm2
* kselftest-user
* kselftest-vm
* kselftest-x86
* kselftest-zram
* kvm-unit-tests
* libhugetlbfs
* linux-log-parser
* ltp-cap_bounds-tests
* ltp-commands-tests
* ltp-containers-tests
* ltp-controllers-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-open-posix-tests
* ltp-pty-tests
* ltp-sched-tests
* ltp-securebits-tests
* ltp-syscalls-tests
* ltp-tracing-tests
* network-basic-tests
* packetdrill
* perf
* rcutorture
* ssuite
* v4l2-compliance

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

Re: [PATCH 4.19 00/74] 4.19.221-rc1 review

[Sudip Mukherjee]

Hi Greg,

On Mon, Dec 13, 2021 at 10:29:31AM +0100, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.19.221 release.
> There are 74 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Wed, 15 Dec 2021 09:29:16 +0000.
> Anything received after that time might be too late.

Build test:
mips (gcc version 11.2.1 20211112): 63 configs -> no failure
arm (gcc version 11.2.1 20211112): 116 configs -> no new failure
arm64 (gcc version 11.2.1 20211112): 2 configs -> no failure
x86_64 (gcc version 11.2.1 20211112): 4 configs -> no failure

Boot test:
x86_64: Booted on my test laptop. No regression.
x86_64: Booted on qemu. No regression. [1]

[1]. https://openqa.qa.codethink.co.uk/tests/508


Tested-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>

--
Regards
Sudip

Re: [PATCH 4.19 29/74] clk: qcom: regmap-mux: fix parent clock lookup

[Pavel Machek]

[-- Attachment #1: Type: text/plain, Size: 1287 bytes --]

Hi!

> The function mux_get_parent() uses qcom_find_src_index() to find the
> parent clock index, which is incorrect: qcom_find_src_index() uses src
> enum for the lookup, while mux_get_parent() should use cfg field (which
> corresponds to the register value). Add qcom_find_cfg_index() function
> doing this kind of lookup and use it for mux parent lookup.

This appears to have problems with error handling.

> +++ b/drivers/clk/qcom/clk-regmap-mux.c
> @@ -36,7 +36,7 @@ static u8 mux_get_parent(struct clk_hw *
>  	val &= mask;
>  
>  	if (mux->parent_map)
> -		return qcom_find_src_index(hw, mux->parent_map, val);
> +		return qcom_find_cfg_index(hw, mux->parent_map, val);
>  
>  	return val;
>  }

So this returns u8.

> +int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map, u8 cfg)
> +{
> +	int i, num_parents = clk_hw_get_num_parents(hw);
> +
> +	for (i = 0; i < num_parents; i++)
> +		if (cfg == map[i].cfg)
> +			return i;
> +
> +	return -ENOENT;
> +}

In case of error, -ENOENT will be cast to u8 in caller. I don't
believe that is correct.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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Re: [PATCH 4.19 29/74] clk: qcom: regmap-mux: fix parent clock lookup

[Dmitry Baryshkov]

On 15/12/2021 12:16, Pavel Machek wrote:
> Hi!
> 
>> The function mux_get_parent() uses qcom_find_src_index() to find the
>> parent clock index, which is incorrect: qcom_find_src_index() uses src
>> enum for the lookup, while mux_get_parent() should use cfg field (which
>> corresponds to the register value). Add qcom_find_cfg_index() function
>> doing this kind of lookup and use it for mux parent lookup.
> 
> This appears to have problems with error handling.
> 
>> +++ b/drivers/clk/qcom/clk-regmap-mux.c
>> @@ -36,7 +36,7 @@ static u8 mux_get_parent(struct clk_hw *
>>   	val &= mask;
>>   
>>   	if (mux->parent_map)
>> -		return qcom_find_src_index(hw, mux->parent_map, val);
>> +		return qcom_find_cfg_index(hw, mux->parent_map, val);
>>   
>>   	return val;
>>   }
> 
> So this returns u8.
> 
>> +int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map, u8 cfg)
>> +{
>> +	int i, num_parents = clk_hw_get_num_parents(hw);
>> +
>> +	for (i = 0; i < num_parents; i++)
>> +		if (cfg == map[i].cfg)
>> +			return i;
>> +
>> +	return -ENOENT;
>> +}
> 
> In case of error, -ENOENT will be cast to u8 in caller. I don't
> believe that is correct.

Unfortunately there is no way to return proper error code from 
clk_ops->get_parent() callback. However returning -ENOENT would 
translate to 254. Then clk_core_get_parent_by_index() would determine 
that there is no such parent and return NULL. A call to clk_set_parent 
would reparent the clock.

Returning some sensible default (e.g. 0) would be much worse, since then 
the clock subsystem would assume that the clock has correct parent. A 
call to clk_set_parent would always result in ops->set_parent() call, 
reparenting the clock correctly.

Most probably it would be correct to make ops->get_parent() return int 
instead of u8 (either an index or an -ERROR). However this was out of 
scope for this patch.

-- 
With best wishes
Dmitry

Re: [PATCH 4.19 29/74] clk: qcom: regmap-mux: fix parent clock lookup

[Pavel Machek]

[-- Attachment #1: Type: text/plain, Size: 2317 bytes --]

Hi!

> > > The function mux_get_parent() uses qcom_find_src_index() to find the
> > > parent clock index, which is incorrect: qcom_find_src_index() uses src
> > > enum for the lookup, while mux_get_parent() should use cfg field (which
> > > corresponds to the register value). Add qcom_find_cfg_index() function
> > > doing this kind of lookup and use it for mux parent lookup.
> > 
> > This appears to have problems with error handling.
> > 
> > > +++ b/drivers/clk/qcom/clk-regmap-mux.c
> > > @@ -36,7 +36,7 @@ static u8 mux_get_parent(struct clk_hw *
> > >   	val &= mask;
> > >   	if (mux->parent_map)
> > > -		return qcom_find_src_index(hw, mux->parent_map, val);
> > > +		return qcom_find_cfg_index(hw, mux->parent_map, val);
> > >   	return val;
> > >   }
> > 
> > So this returns u8.
> > 
> > > +int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map, u8 cfg)
> > > +{
> > > +	int i, num_parents = clk_hw_get_num_parents(hw);
> > > +
> > > +	for (i = 0; i < num_parents; i++)
> > > +		if (cfg == map[i].cfg)
> > > +			return i;
> > > +
> > > +	return -ENOENT;
> > > +}
> > 
> > In case of error, -ENOENT will be cast to u8 in caller. I don't
> > believe that is correct.
> 
> Unfortunately there is no way to return proper error code from
> clk_ops->get_parent() callback. However returning -ENOENT would translate to
> 254. Then clk_core_get_parent_by_index() would determine that there is no
> such parent and return NULL. A call to clk_set_parent would reparent the
> clock.

Yeah, I guess it happens to work.

> Returning some sensible default (e.g. 0) would be much worse, since then the
> clock subsystem would assume that the clock has correct parent. A call to
> clk_set_parent would always result in ops->set_parent() call, reparenting
> the clock correctly.

Well ~0 would be sensible in this case. And a comment with explanation.

> Most probably it would be correct to make ops->get_parent() return int
> instead of u8 (either an index or an -ERROR). However this was out of scope
> for this patch.

Yep, I believe that should happen, long-term.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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