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3fd34ac02a
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Hang Yuan 3fd34ac02a drm/i915/gvt: fix cleanup sequence in intel_gvt_clean_device 
Create one vGPU and then unbind IGD device from i915 driver. The following
oops will happen. This patch will free vgpu resource first and then gvt
resource to remove these oops.

BUG: unable to handle kernel NULL pointer dereference at       00000000000000a8
  PGD 80000003c9d2c067 P4D 80000003c9d2c067 PUD 3c817c067 P      MD 0
  Oops: 0002 [#1] SMP PTI
  RIP: 0010:down_write+0x1b/0x40
Call Trace:
  debugfs_remove_recursive+0x46/0x1a0
  intel_gvt_debugfs_remove_vgpu+0x15/0x30 [i915]
  intel_gvt_destroy_vgpu+0x2d/0xf0 [i915]
  intel_vgpu_remove+0x2c/0x30 [kvmgt]
  mdev_device_remove_ops+0x23/0x50 [mdev]
  mdev_device_remove+0xdb/0x190 [mdev]
  mdev_device_remove+0x190/0x190 [mdev]
  device_for_each_child+0x47/0x90
  mdev_unregister_device+0xd5/0x120 [mdev]
  intel_gvt_clean_device+0x91/0x120 [i915]
  i915_driver_unload+0x9d/0x120 [i915]
  i915_pci_remove+0x15/0x20 [i915]
  pci_device_remove+0x3b/0xc0
  device_release_driver_internal+0x157/0x230
  unbind_store+0xfc/0x150
  kernfs_fop_write+0x10f/0x180
  __vfs_write+0x36/0x180
  ? common_file_perm+0x41/0x130
  ? _cond_resched+0x16/0x40
  vfs_write+0xb3/0x1a0
  ksys_write+0x52/0xc0
  do_syscall_64+0x55/0x100
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: unable to handle kernel NULL pointer dereference at 0      000000000000038
  PGD 8000000405bce067 P4D 8000000405bce067 PUD 405bcd067 PM      D 0
  Oops: 0000 [#1] SMP PTI
  RIP: 0010:hrtimer_active+0x5/0x40
Call Trace:
  hrtimer_try_to_cancel+0x25/0x120
  ? tbs_sched_clean_vgpu+0x1f/0x50 [i915]
  hrtimer_cancel+0x15/0x20
  intel_gvt_destroy_vgpu+0x4c/0xf0 [i915]
  intel_vgpu_remove+0x2c/0x30 [kvmgt]
  mdev_device_remove_ops+0x23/0x50 [mdev]
  mdev_device_remove+0xdb/0x190 [mdev]
  ? mdev_device_remove+0x190/0x190 [mdev]
  device_for_each_child+0x47/0x90
  mdev_unregister_device+0xd5/0x120 [mdev]
  intel_gvt_clean_device+0x89/0x120 [i915]
  i915_driver_unload+0x9d/0x120 [i915]
  i915_pci_remove+0x15/0x20 [i915]
  pci_device_remove+0x3b/0xc0
  device_release_driver_internal+0x157/0x230
  unbind_store+0xfc/0x150
  kernfs_fop_write+0x10f/0x180
  __vfs_write+0x36/0x180
  ? common_file_perm+0x41/0x130
  ? _cond_resched+0x16/0x40
  vfs_write+0xb3/0x1a0
  ksys_write+0x52/0xc0
  do_syscall_64+0x55/0x100
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: bc7b0be316ae("drm/i915/gvt: Add basic debugfs infrastructure")
Fixes: afe04fbe6c52("drm/i915/gvt: create an idle vGPU")
Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
2018-08-14 15:25:32 +08:00
..
accessibility
acpi ACPICA: AML Parser: ignore dispatcher error status during table load 2018-07-23 13:39:33 +02:00
amba Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-06-06 13:49:25 -07:00
android treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
ata ata: Remove depends on HAS_DMA in case of platform dependency 2018-07-02 13:18:22 -07:00
atm atm: zatm: Fix potential Spectre v1 2018-06-30 21:24:18 +09:00
auxdisplay treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
base Driver core fixes for 4.18-rc7 2018-07-26 09:25:03 -07:00
bcma dma-mapping updates for 4.18: 2018-06-04 10:58:12 -07:00
block for-linus-20180727 2018-07-27 12:51:00 -07:00
bluetooth bluetooth: hci_nokia: Don't include linux/unaligned/le_struct.h directly. 2018-06-17 08:38:55 +09:00
bus bus: ti-sysc: Use 2-factor allocator arguments 2018-07-02 04:24:44 -07:00
cdrom treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
char In reaction to the fixes to address CVE-2018-1108, some Linux 2018-07-28 19:40:06 -07:00
clk clk: aspeed: Support HPLL strapping on ast2400 2018-07-11 09:34:25 -07:00
clocksource clocksource: arm_arch_timer: Set arch_mem_timer cpumask to cpu_possible_mask 2018-07-10 22:12:47 +02:00
connector Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-06-06 18:39:49 -07:00
cpufreq cpufreq: qcom-kryo: add NULL entry to the end of_device_id array 2018-07-24 10:44:57 +02:00
cpuidle powerpc updates for 4.18 2018-06-07 10:23:33 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-06-24 06:31:54 +08:00
dax * fix one ensures that a variable passed in by reference to 2018-07-13 10:54:01 -07:00
dca
devfreq treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
dio
dma dmaengine: k3dma: Off by one in k3_of_dma_simple_xlate() 2018-06-28 11:57:21 +05:30
dma-buf dma-buf: Move BUG_ON from _add_shared_fence to _add_shared_inplace 2018-07-16 20:20:37 +05:30
edac treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
eisa
extcon treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
firewire treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
firmware efi/libstub/tpm: Initialize efi_physical_addr_t vars to zero for mixed mode 2018-06-22 10:58:27 +02:00
fmc treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
fpga fpga: altera-cvp: Fix an error handling path in 'altera_cvp_probe()' 2018-07-07 16:55:22 +02:00
fsi
gpio gpio: uniphier: set legitimate irq trigger type in .to_irq hook 2018-07-23 23:13:31 +02:00
gpu drm/i915/gvt: fix cleanup sequence in intel_gvt_clean_device 2018-08-14 15:25:32 +08:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2018-07-09 17:16:11 -07:00
hsi
hv treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
hwmon hwmon: (nct6775) Fix loop limit 2018-06-16 16:40:36 -07:00
hwspinlock hwspinlock updates for v4.18 2018-06-11 12:09:19 -07:00
hwtracing treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
i2c i2c: imx: use open drain for recovery GPIO 2018-07-24 14:59:12 +02:00
ide treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
idle
iio iio: imu: inv_mpu6050: Fix probe() failure on older ACPI based machines 2018-06-24 14:50:52 +01:00
infiniband Regression, user visible bugs, and crashing fixes: 2018-07-13 12:42:14 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2018-07-27 09:53:45 -07:00
iommu Revert "iommu/vt-d: Clean up pasid quirk for pre-production devices" 2018-07-20 13:55:56 +02:00
ipack treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
irqchip irqchip/gic-v3-its: Fix reprogramming of redistributors on CPU hotplug 2018-06-22 14:22:02 +02:00
isdn Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
leds treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
lightnvm for-linus-20180623 2018-06-24 06:33:54 +08:00
macintosh powerpc updates for 4.18 2018-06-07 10:23:33 -07:00
mailbox treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
mcb
md - Fix DM writecache target to allow an optional offset to the start of 2018-07-20 14:24:17 -07:00
media BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
memory - Error path bug fix for overflow tests (Dan) 2018-06-12 18:28:00 -07:00
memstick treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
message treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
mfd Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2018-06-14 16:21:46 +09:00
misc Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-07-22 12:04:51 -07:00
mmc mmc: sdhci-esdhc-imx: allow 1.8V modes without 100/200MHz pinctrl states 2018-07-09 11:17:47 +02:00
mtd mtd: spi-nor: cadence-quadspi: Fix direct mode write timeouts 2018-07-03 10:01:44 +02:00
mux
net net: axienet: Fix double deregister of mdio 2018-07-24 16:38:01 -07:00
nfc NFC: pn533: Fix wrong GFP flag usage 2018-06-25 21:36:45 +08:00
ntb - Error path bug fix for overflow tests (Dan) 2018-06-12 18:28:00 -07:00
nubus Char/Misc driver patches for 4.18-rc1 2018-06-05 16:20:22 -07:00
nvdimm * fix one ensures that a variable passed in by reference to 2018-07-13 10:54:01 -07:00
nvme for-linus-20180727 2018-07-27 12:51:00 -07:00
nvmem nvmem: Don't let a NULL cell_id for nvmem_cell_get() crash us 2018-07-07 17:30:25 +02:00
of of: overlay: update phandle cache on overlay apply and remove 2018-07-16 08:41:32 -06:00
opp PM / OPP: Update voltage in case freq == old_freq 2018-06-19 15:53:32 +05:30
oprofile treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
parisc dma-mapping updates for 4.18: 2018-06-04 10:58:12 -07:00
parport docs: Fix some broken references 2018-06-15 18:10:01 -03:00
pci BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
pcmcia treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
perf drivers/perf: xgene_pmu: Fix IOB SLOW PMU parser error 2018-06-18 17:48:42 +01:00
phy phy: mapphone-mdm6600: Fix wrong enum used for status lines 2018-06-29 12:00:22 +05:30
pinctrl pinctrl: nsp: Fix potential NULL dereference 2018-07-14 12:47:04 +02:00
platform platform/x86: dell-laptop: Fix backlight detection 2018-07-20 15:29:59 +03:00
pnp media updates for v4.18-rc1 2018-06-07 12:34:37 -07:00
power treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
powercap treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
pps
ps3
ptp ptp: fix missing break in switch 2018-07-18 15:25:25 -07:00
pwm pwm: Changes for v4.18-rc1 2018-06-14 16:25:43 +09:00
rapidio treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
ras
regulator treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
remoteproc treewide: use PHYS_ADDR_MAX to avoid type casting ULLONG_MAX 2018-06-15 07:55:25 +09:00
reset - Error path bug fix for overflow tests (Dan) 2018-06-12 18:28:00 -07:00
rpmsg rpmsg: smd: do not use mananged resources for endpoints and channels 2018-06-04 12:35:03 -07:00
rtc rtc: fix alarm read and set offset 2018-07-13 10:37:54 +02:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-07-06 09:14:34 -07:00
sbus fix a series of Documentation/ broken file name references 2018-06-15 18:10:01 -03:00
scsi for-linus-20180727 2018-07-27 12:51:00 -07:00
sfi
sh treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
siox
slimbus treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
sn
soc i.MX fixes for 4.18, round 3: 2018-07-19 15:09:59 -07:00
soundwire docs: Fix more broken references 2018-06-15 18:11:26 -03:00
spi treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
spmi
ssb ssb: make SSB_PCICORE_HOSTMODE depend on SSB = y 2018-05-12 11:38:13 +03:00
staging BackMerge v4.18-rc7 into drm-next 2018-07-30 10:39:22 +10:00
target scsi: target: Fix truncated PR-in ReadKeys response 2018-06-19 21:36:37 -04:00
tc
tee drm-misc-next for 4.19: 2018-06-22 12:58:08 +10:00
thermal - Error path bug fix for overflow tests (Dan) 2018-06-12 18:28:00 -07:00
thunderbolt thunderbolt: Notify userspace when boot_acl is changed 2018-07-07 17:29:17 +02:00
tty vt: prevent leaking uninitialized data to userspace via /dev/vcs* 2018-06-28 21:34:39 +09:00
uio uio: fix crash after the device is unregistered 2018-07-07 16:57:35 +02:00
usb usb: core: handle hub C_PORT_OVER_CURRENT condition 2018-07-21 08:38:29 +02:00
uwb treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
vfio powerpc fixes for 4.18 #4 2018-07-21 16:46:53 -07:00
vhost vhost_net: validate sock before trying to put its fd 2018-06-23 10:23:49 +09:00
video console: dummycon: export dummycon_[un]register_output_notifier 2018-06-29 11:46:19 +02:00
virt treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
virtio virtio, vhost: features, fixes 2018-06-16 06:35:02 +09:00
visorbus
vlynq
vme
w1 Char/Misc driver patches for 4.18-rc1 2018-06-05 16:20:22 -07:00
watchdog MIPS changes for 4.18 2018-06-12 12:56:02 -07:00
xen xen: fixes for 4.18-rc2 2018-06-23 20:44:11 +08:00
zorro - Introduce arithmetic overflow test helper functions (Rasmus) 2018-06-06 17:27:14 -07:00
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