Jiang Liu a4eaa86c0c iommu/vt-d: Check for NULL pointer when freeing IOMMU data structure ... Domain id 0 will be assigned to invalid translation without allocating domain data structure if DMAR unit supports caching mode. So in function free_dmar_iommu(), we should check whether the domain pointer is NULL, otherwise it will cause system crash as below: [ 6.790519] BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8 [ 6.799520] IP: [<ffffffff810e2dc8>] __lock_acquire+0x11f8/0x1430 [ 6.806493] PGD 0 [ 6.817972] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC [ 6.823303] Modules linked in: [ 6.826862] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc1+ #126 [ 6.834252] Hardware name: Intel Corporation BRICKLAND/BRICKLAND, BIOS BRIVTIN1.86B.0047.R00.1402050741 02/05/2014 [ 6.845951] task: ffff880455a80000 ti: ffff880455a88000 task.ti: ffff880455a88000 [ 6.854437] RIP: 0010:[<ffffffff810e2dc8>] [<ffffffff810e2dc8>] __lock_acquire+0x11f8/0x1430 [ 6.864154] RSP: 0000:ffff880455a89ce0 EFLAGS: 00010046 [ 6.870179] RAX: 0000000000000046 RBX: 0000000000000002 RCX: 0000000000000000 [ 6.878249] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000c8 [ 6.886318] RBP: ffff880455a89d40 R08: 0000000000000002 R09: 0000000000000001 [ 6.894387] R10: 0000000000000000 R11: 0000000000000001 R12: ffff880455a80000 [ 6.902458] R13: 0000000000000000 R14: 00000000000000c8 R15: 0000000000000000 [ 6.910520] FS: 0000000000000000(0000) GS:ffff88045b800000(0000) knlGS:0000000000000000 [ 6.919687] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6.926198] CR2: 00000000000000c8 CR3: 0000000001e0e000 CR4: 00000000001407f0 [ 6.934269] Stack: [ 6.936588] ffffffffffffff10 ffffffff810f59db 0000000000000010 0000000000000246 [ 6.945219] ffff880455a89d10 0000000000000000 ffffffff82bcb980 0000000000000046 [ 6.953850] 0000000000000000 0000000000000000 0000000000000002 0000000000000000 [ 6.962482] Call Trace: [ 6.965300] [<ffffffff810f59db>] ? vprintk_emit+0x4fb/0x5a0 [ 6.971716] [<ffffffff810e3185>] lock_acquire+0x185/0x200 [ 6.977941] [<ffffffff821fbbee>] ? init_dmars+0x839/0xa1d [ 6.984167] [<ffffffff81870b06>] _raw_spin_lock_irqsave+0x56/0x90 [ 6.991158] [<ffffffff821fbbee>] ? init_dmars+0x839/0xa1d [ 6.997380] [<ffffffff821fbbee>] init_dmars+0x839/0xa1d [ 7.003410] [<ffffffff8147d575>] ? pci_get_dev_by_id+0x75/0xd0 [ 7.010119] [<ffffffff821fc146>] intel_iommu_init+0x2f0/0x502 [ 7.016735] [<ffffffff821a7947>] ? iommu_setup+0x27d/0x27d [ 7.023056] [<ffffffff821a796f>] pci_iommu_init+0x28/0x52 [ 7.029282] [<ffffffff81002162>] do_one_initcall+0xf2/0x220 [ 7.035702] [<ffffffff810a4a29>] ? parse_args+0x2c9/0x450 [ 7.041919] [<ffffffff8219d1b1>] kernel_init_freeable+0x1c9/0x25b [ 7.048919] [<ffffffff8219c8d2>] ? do_early_param+0x8a/0x8a [ 7.055336] [<ffffffff8184d3f0>] ? rest_init+0x150/0x150 [ 7.061461] [<ffffffff8184d3fe>] kernel_init+0xe/0x100 [ 7.067393] [<ffffffff8187b5fc>] ret_from_fork+0x7c/0xb0 [ 7.073518] [<ffffffff8184d3f0>] ? rest_init+0x150/0x150 [ 7.079642] Code: 01 76 18 89 05 46 04 36 01 41 be 01 00 00 00 e9 2f 02 00 00 0f 1f 80 00 00 00 00 41 be 01 00 00 00 e9 1d 02 00 00 0f 1f 44 00 00 <49> 81 3e c0 31 34 82 b8 01 00 00 00 0f 44 d8 41 83 ff 01 0f 87 [ 7.104944] RIP [<ffffffff810e2dc8>] __lock_acquire+0x11f8/0x1430 [ 7.112008] RSP <ffff880455a89ce0> [ 7.115988] CR2: 00000000000000c8 [ 7.119784] ---[ end trace 13d756f0f462c538 ]--- [ 7.125034] note: swapper/0[1] exited with preempt_count 1 [ 7.131285] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 [ 7.131285] Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>		2014-03-04 17:51:03 +01:00
..
accessibility
acpi	ACPI / processor: Rework processor throttling with work_on_cpu()	2014-02-27 00:21:05 +01:00
amba
ata	PCI updates for v3.14:	2014-02-20 12:46:24 -08:00
atm
auxdisplay
base	PM / hibernate: Fix restore hang in freeze_processes()	2014-02-26 01:13:15 +01:00
bcma	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-01-30 17:20:32 -08:00
block	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2014-02-14 10:45:18 -08:00
bluetooth
bus	drivers: bus: fix CCI driver kcalloc call parameters swap	2014-01-31 15:15:13 -08:00
cdrom	Merge branch 'for-3.14/drivers' of git://git.kernel.dk/linux-block	2014-01-30 11:40:10 -08:00
char	Char/Misc fixes for 3.14-rc3	2014-02-14 16:13:00 -08:00
clk	The second half of the clock framework pull requeust for 3.14 is	2014-01-28 18:44:53 -08:00
clocksource	clocksource: Kona: Print warning rather than panic	2014-02-06 16:01:40 +01:00
connector
cpufreq	intel_pstate: Change busy calculation to use fixed point math.	2014-02-26 00:56:49 +01:00
cpuidle	powerpc/powernv/cpuidle: Back-end cpuidle driver for powernv platform.	2014-01-29 17:02:24 +11:00
crypto	crypto/nx/nx-842: Fix handling of vmalloc addresses	2014-02-11 11:24:49 +11:00
dca
devfreq	Merge branches 'pm-cpufreq' and 'pm-devfreq'	2014-01-29 11:48:23 +01:00
dio
dma	Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma	2014-03-01 21:30:43 -06:00
edac	i7300_edac: Fix device reference count	2014-02-25 09:43:13 +01:00
eisa
extcon	ASoC: dapm: Add locking to snd_soc_dapm_xxxx_pin functions	2014-02-20 18:40:07 +09:00
firewire	firewire: Enable remote DMA above 4 GB	2014-01-20 01:11:13 +01:00
firmware	firmware/google: drop 'select EFI' to avoid recursive dependency	2014-01-27 21:02:40 -08:00
fmc	drivers/fmc/fmc-write-eeprom.c: fix decimal permissions	2014-02-25 15:25:43 -08:00
gpio	gpio: tb10x: GPIO_TB10X needs to select GENERIC_IRQ_CHIP	2014-02-05 11:13:59 +01:00
gpu	Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux	2014-03-02 15:25:45 -08:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2014-02-18 16:29:46 -08:00
hsi
hv	Drivers: hv: vmbus: Don't timeout during the initial connection with host	2014-02-07 08:27:34 -08:00
hwmon	hwmon: (max1668) Fix writing the minimum temperature	2014-02-18 15:53:49 -08:00
hwspinlock
i2c	i2c: mv64xxx: refactor message start to ensure proper initialization	2014-02-15 15:42:31 +01:00
ide	drivers: ide: Include appropriate header file in ide-pio-blacklist.c	2014-01-28 23:35:09 -08:00
idle	ACPI and power management updates for 3.14-rc1	2014-01-24 15:51:02 -08:00
iio	iio:gyro: bug on L3GD20H gyroscope support	2014-02-18 10:24:49 +00:00
infiniband	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2014-02-15 16:18:47 -08:00
input	ASoC: dapm: Add locking to snd_soc_dapm_xxxx_pin functions	2014-02-20 18:40:07 +09:00
iommu	iommu/vt-d: Check for NULL pointer when freeing IOMMU data structure	2014-03-04 17:51:03 +01:00
ipack
irqchip	irq-metag*: stop set_affinity vectoring to offline cpus	2014-02-25 22:35:06 +00:00
isdn	isdn/hisax: hex vs decimal typo in prfeatureind()	2014-02-06 21:18:06 -08:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2014-01-28 18:53:01 -08:00
lguest
macintosh	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2014-01-27 21:11:26 -08:00
mailbox	drivers/mailbox/omap: make mbox->irq signed for error handling	2014-01-23 16:36:53 -08:00
md	dm cache: fix truncation bug when mapping I/O to >2TB fast device	2014-02-28 09:23:02 -05:00
media	[media] adv7842: Composite free-run platfrom-data fix	2014-02-04 06:46:10 -02:00
memory
memstick	drivers/memstick/host/rtsx_pci_ms.c: fix ms card data transfer bug	2014-01-23 16:37:04 -08:00
message	drivers/message/i2o/i2o_config.c: fix deadlock in compat_ioctl(I2OGETIOPS)	2014-02-10 16:01:40 -08:00
mfd	sound fixes for 3.14-rc4	2014-02-21 09:55:32 -08:00
misc	mei: set client's read_cb to NULL when flow control fails	2014-02-18 10:07:36 -08:00
mmc	Fix uses of dma_max_pfn() when converting to a limiting address	2014-02-17 23:08:41 +00:00
mtd	Just a single fix for the UBI module unload path which makes sure we do not	2014-02-27 10:36:50 -08:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2014-02-18 15:52:43 -08:00
nfc
ntb
nubus
of	Device tree compatible match order bug fix	2014-02-21 14:35:05 -08:00
oprofile
parisc
parport	TTY/Serial driver patches for 3.14-rc1	2014-01-20 16:05:23 -08:00
pci	PCI updates for v3.14:	2014-02-20 12:46:24 -08:00
pcmcia	PCI changes for the v3.14 merge window:	2014-01-22 16:39:28 -08:00
phy	phy: let phy_provider_register be the last step in registering PHY	2014-02-18 12:13:16 -08:00
pinctrl	pinctrl: tegra: return correct error type	2014-02-06 14:21:19 +01:00
platform	platform/chrome: Cleanups and improvements	2014-01-29 20:06:01 -08:00
pnp
power	Few fixes:	2014-02-14 10:32:28 -08:00
powercap
pps
ps3
ptp
pwm	pwm: lp3943: Fix potential memory leak during request	2014-02-26 15:45:12 +01:00
rapidio
regulator	Merge remote-tracking branches 'regulator/fix/da9063', 'regulator/fix/max14577' and 'regulator/fix/s5m8767' into regulator-linus	2014-02-23 12:22:18 +09:00
remoteproc
reset
rpmsg
rtc	Merge branch 'akpm' (incoming from Andrew)	2014-01-23 19:11:50 -08:00
s390	s390/cio: Fix missing subchannels after CHPID configure on	2014-02-21 08:48:33 +01:00
sbus	Sparc: sparc_cpu_model isn't in asm/system.h any more [ver #2]	2014-02-20 13:34:11 -05:00
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2014-03-01 21:33:09 -06:00
sfi
sh
sn
spi	Merge remote-tracking branches 'spi/fix/doc', 'spi/fix/nuc900' and 'spi/fix/rspi' into spi-linus	2014-02-11 12:08:27 +00:00
ssb	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-01-30 17:20:32 -08:00
staging	Fourth set of IIO fixes for the 3.14 kernel.	2014-02-28 17:08:03 -08:00
target	Target/sbc: Don't use sg as iterator in sbc_verify_read	2014-02-23 16:35:32 -08:00
tc
thermal	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux	2014-01-24 17:13:49 -08:00
tty	Revert "tty: Set correct tty name in 'active' sysfs attribute"	2014-02-22 14:31:04 -08:00
uio
usb	usb: ehci: fix deadlock when threadirqs option is used	2014-02-26 15:46:42 -08:00
uwb
vfio	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2014-01-27 21:11:26 -08:00
vhost	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2014-03-01 21:33:09 -06:00
video	video: Kconfig: Allow more broad selection of the imxfb framebuffer driver.	2014-02-14 10:44:52 +02:00
virt
virtio	A few simple fixes. Quiet cycle.	2014-01-22 22:24:35 -08:00
vlynq	drivers/vlynq/vlynq.c: fix another resource size off by 1 error	2014-01-23 16:36:55 -08:00
vme	VME: Correct read/write alignment algorithm	2014-02-07 08:16:14 -08:00
w1	drivers/w1/masters/w1-gpio.c: add strong pullup emulation	2014-01-23 16:37:04 -08:00
watchdog	watchdog: w83697hf_wdt: return ENODEV if no device was found	2014-02-21 20:36:46 +01:00
xen	Bug-fix:	2014-02-12 12:28:05 -08:00
zorro
Kconfig
Makefile