AuxXxilium/linux_dsm_epyc7002
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0a8f72fafb
linux_dsm_epyc7002/drivers
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Alexander Shishkin 0a8f72fafb stm class: Lose the protocol driver when dropping its reference 
Commit c7fd62bc69 ("stm class: Introduce framing protocol drivers")
forgot to tear down the link between an stm device and its protocol
driver when policy is removed. This leads to an invalid pointer reference
if one tries to write to an stm device after the policy has been removed
and the protocol driver module unloaded, leading to the below splat:

> BUG: unable to handle page fault for address: ffffffffc0737068
> #PF: supervisor read access in kernel mode
> #PF: error_code(0x0000) - not-present page
> PGD 3d780f067 P4D 3d780f067 PUD 3d7811067 PMD 492781067 PTE 0
> Oops: 0000 [#1] SMP NOPTI
> CPU: 1 PID: 26122 Comm: cat Not tainted 5.4.0-rc5+ #1
> RIP: 0010:stm_output_free+0x40/0xc0 [stm_core]
> Call Trace:
>  stm_char_release+0x3e/0x70 [stm_core]
>  __fput+0xc6/0x260
>  ____fput+0xe/0x10
>  task_work_run+0x9d/0xc0
>  exit_to_usermode_loop+0x103/0x110
>  do_syscall_64+0x19d/0x1e0
>  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fix this by tearing down the link from an stm device to its protocol
driver when the policy involving that driver is removed.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Fixes: c7fd62bc69 ("stm class: Introduce framing protocol drivers")
Reported-by: Ammy Yi <ammy.yi@intel.com>
Tested-by: Ammy Yi <ammy.yi@intel.com>
CC: stable@vger.kernel.org # v4.20+
Link: https://lore.kernel.org/r/20191114064201.43089-2-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-14 14:48:48 +08:00
..
accessibility
acpi Power management fix for 5.4-rc6 2019-11-01 09:30:48 -07:00
amba ARM updates for 5.4-rc: 2019-10-23 06:26:33 -04:00
android binder: Handle start==NULL in binder_update_page_range() 2019-11-14 11:44:47 +08:00
ata ata: libahci_platform: Fix regulator_get_optional() misuse 2019-10-25 14:22:20 -06:00
atm atm: he: clean up an indentation issue 2019-09-25 13:54:45 +02:00
auxdisplay It's a somewhat calmer cycle for docs this time, as the churn of the mass 2019-09-17 16:22:26 -07:00
base PM: QoS: Drop frequency QoS types from device PM QoS 2019-10-21 02:05:21 +02:00
bcma bcma: make arrays pwr_info_offset and sprom_sizes static const, shrinks object size 2019-09-13 16:44:49 +03:00
block block: drbd: remove a stray unlock in __drbd_send_protocol() 2019-11-08 06:55:22 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-09-15 14:17:27 +02:00
bus bus: ti-sysc: Fix watchdog quirk handling 2019-10-18 08:45:32 -07:00
cdrom
char lp: fix sparc64 LPSETTIMEOUT ioctl 2019-11-13 19:08:22 +08:00
clk Fixes for various clk driver issues that happened because of code we 2019-11-08 08:15:01 -08:00
clocksource - Fix scary messages in sh_mtu2 by using platform_irq_count() helper 2019-11-04 18:43:23 +01:00
connector
counter
cpufreq cpufreq: intel_pstate: Fix invalid EPB setting 2019-11-08 11:29:58 +01:00
cpuidle cpuidle: haltpoll: Take 'idle=' override into account 2019-10-22 11:43:17 +02:00
crypto inet: stop leaking jiffies on the wire 2019-11-01 14:57:52 -07:00
dax
dca
devfreq
dio
dma dmaengine: cppi41: Fix cppi41_dma_prep_slave_sg() when idle 2019-10-23 21:15:21 +05:30
dma-buf dma-buf/resv: fix exclusive fence get 2019-10-10 17:05:20 +02:00
edac EDAC/ghes: Fix Use after free in ghes_edac remove path 2019-10-17 11:27:05 +02:00
eisa
extcon extcon: sm5502: remove redundant assignment to variable cable_type 2019-10-31 13:47:42 +09:00
firewire
firmware firmware: Fix incompatible function behavior for RSU driver 2019-11-14 13:11:32 +08:00
fpga fpga: dfl: fme: add power management support 2019-10-16 19:18:27 -07:00
fsi fsi: aspeed: Fix OPB0 byte order register values 2019-11-08 11:28:21 +01:00
gnss
gpio Merge 5.4-rc7 into char-misc-next 2019-11-11 06:24:30 +01:00
gpu Merge tag 'drm-fixes-5.4-2019-11-06' of git://people.freedesktop.org/~agd5f/linux into drm-fixes 2019-11-08 13:07:58 +10:00
greybus greybus: remove excessive check in gb_connection_hd_cport_quiesce() 2019-10-10 15:24:19 +02:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2019-11-07 11:54:54 -08:00
hsi HSI changes for the 5.4 series 2019-09-22 12:02:21 -07:00
hv Drivers: hv: vmbus: Fix harmless building warnings without CONFIG_PM_SLEEP 2019-10-01 14:49:45 -04:00
hwmon hwmon: (ina3221) Fix read timeout issue 2019-10-28 18:46:55 -07:00
hwspinlock
hwtracing stm class: Lose the protocol driver when dropping its reference 2019-11-14 14:48:48 +08:00
i2c i2c: stm32f7: remove warning when compiling with W=1 2019-10-24 20:52:21 +02:00
i3c
ide
idle
iio Merge 5.4-rc7 into char-misc-next 2019-11-11 06:24:30 +01:00
infiniband RDMA/hns: Prevent memory leaks of eq->buf_list 2019-10-28 15:06:38 -03:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2019-10-25 17:31:53 -04:00
interconnect Merge 5.4-rc7 into char-misc-next 2019-11-11 06:24:30 +01:00
iommu iommu/vt-d: Fix panic after kexec -p for kdump 2019-10-30 10:30:22 +01:00
ipack
irqchip irqchip updates for 5.4, take 2 2019-10-25 14:25:15 +02:00
isdn net: use skb_queue_empty_lockless() in poll() handlers 2019-10-28 13:33:41 -07:00
leds leds: lm3532: Fix optional led-max-microamp prop error handling 2019-09-12 20:45:52 +02:00
lightnvm lightnvm: print error when target is not found 2019-09-05 13:17:01 -06:00
macintosh cpufreq: Use per-policy frequency QoS 2019-10-21 02:05:21 +02:00
mailbox mailbox: qcom-apcs: fix max_register value 2019-09-17 00:54:29 -05:00
mcb drivers: mcb: use symbol namespaces 2019-11-03 19:54:53 +01:00
md for-linus-2019-10-18 2019-10-18 22:29:36 -04:00
media media: stkwebcam: fix runtime PM after driver unbind 2019-10-04 14:38:46 +02:00
memory
memstick memstick: jmb38x_ms: Fix an error handling path in 'jmb38x_ms_probe()' 2019-10-09 11:08:03 +02:00
message
mfd mfd: mt6397: Fix probe after changing mt6397-core 2019-10-24 08:49:25 +01:00
misc misc: rtsx: Add support for RTS5261 2019-11-14 13:07:48 +08:00
mmc mmc: mxs: fix flags passed to dmaengine_prep_slave_sg 2019-10-21 16:16:38 +02:00
mtd mtd: rawnand: au1550nd: Fix au_read_buf16() prototype 2019-10-07 09:56:36 +02:00
mux
net Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue 2019-11-08 16:50:14 -08:00
nfc NFC: st21nfca: fix double free 2019-11-06 21:48:29 -08:00
ntb NTB: fix IDT Kconfig typos/spellos 2019-09-23 17:20:40 -04:00
nubus
nvdimm libnvdimm fixes v5.4-rc1 2019-09-29 10:33:41 -07:00
nvme for-linus-2019-11-08 2019-11-08 18:15:55 -08:00
nvmem nvmem: add Rockchip OTP driver 2019-11-05 18:35:33 +01:00
of of: reserved_mem: add missing of_node_put() for proper ref-counting 2019-10-23 15:15:05 -05:00
opp opp: Reinitialize the list_kref before adding the static OPPs again 2019-10-23 10:58:44 +05:30
oprofile
parisc parisc: Remove 32-bit DMA enforcement from sba_iommu 2019-10-14 21:44:26 +02:00
parport parport: daisy: use new parport device model 2019-11-13 19:09:49 +08:00
pci PCI: PM: Fix pci_power_up() 2019-10-15 23:51:36 +02:00
pcmcia pcmcia: include cs_internal.h for missing declarations 2019-11-14 12:22:11 +08:00
perf
phy phy: phy-rockchip-inno-usb2: add phy description for px30 2019-10-31 18:27:47 +05:30
pinctrl pinctrl: stmfx: fix valid_mask init sequence 2019-11-07 10:06:46 +01:00
platform Merge 5.4-rc5 into char-misc-next 2019-10-27 18:48:33 +01:00
pnp
power power supply and reset changes for the v5.4 series 2019-09-22 12:04:59 -07:00
powercap Power management updates for 5.4-rc1 2019-09-17 19:15:14 -07:00
pps
ps3
ptp ptp: fix typo of "mechanism" in Kconfig help text 2019-10-07 14:55:46 -04:00
pwm pwm: bcm-iproc: Prevent unloading the driver module while in use 2019-11-08 18:38:06 +01:00
rapidio
ras
regulator regulator: Fixes for v5.4 2019-10-23 15:31:17 -04:00
remoteproc remoteproc updates for v5.4 2019-09-22 10:55:08 -07:00
reset reset: fix of_reset_control_get_count kerneldoc comment 2019-10-24 10:26:33 +02:00
rpmsg rpmsg: glink-smem: Name the edge based on parent remoteproc 2019-09-17 15:33:31 -07:00
rtc RTC for 5.4 2019-09-22 11:05:43 -07:00
s390 s390/zcrypt: fix memleak at release 2019-10-22 17:55:51 +02:00
sbus
scsi SCSI fixes on 20191101 2019-11-02 11:15:52 -07:00
sfi
sh
siox
slimbus
soc soc: imx: gpc: fix initialiser format 2019-10-26 19:47:31 +08:00
soundwire Merge 5.4-rc7 into char-misc-next 2019-11-11 06:24:30 +01:00
spi LED updates for 5.4-rc1 2019-09-17 18:40:42 -07:00
spmi
ssb ssb: make array pwr_info_offset static const, makes object smaller 2019-09-13 17:23:18 +03:00
staging staging: Fix error return code in vboxsf_fill_super() 2019-11-07 16:29:18 +01:00
target SCSI fixes on 20191101 2019-11-02 11:15:52 -07:00
tc
tee tee/shm: untag user pointers in tee_shm_register 2019-09-25 17:51:41 -07:00
thermal cpufreq: Use per-policy frequency QoS 2019-10-21 02:05:21 +02:00
thunderbolt thunderbolt: Do not start firmware unless asked by the user 2019-11-02 12:13:31 +03:00
tty drivers: mcb: use symbol namespaces 2019-11-03 19:54:53 +01:00
uio uio: fix irq init with dt support & irq not defined 2019-11-14 11:49:48 +08:00
usb usb: dwc3: gadget: fix race when disabling ep with cancelled xfers 2019-10-31 18:57:54 +01:00
vfio vfio/type1: Initialize resv_msi_base 2019-10-15 14:07:01 -06:00
vhost vringh: fix copy direction of vringh_iov_push_kern() 2019-10-28 04:25:04 -04:00
video - Some new documentation for GEM shmem madvise helpers 2019-11-08 12:12:57 +10:00
virt virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr 2019-10-10 14:50:32 +02:00
virtio virtio_ring: fix stalls for packed rings 2019-10-28 04:24:46 -04:00
visorbus
vlynq
vme
w1 w1: new driver. DS2430 chip 2019-11-14 13:06:33 +08:00
watchdog Merge 5.4-rc7 into char-misc-next 2019-11-11 06:24:30 +01:00
xen Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-10-19 17:09:11 -04:00
zorro
Kconfig Staging/IIO driver patches for 5.4-rc1 2019-09-18 11:05:34 -07:00
Makefile Staging/IIO driver patches for 5.4-rc1 2019-09-18 11:05:34 -07:00