AuxXxilium/linux_dsm_epyc7002
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1380f5754c
linux_dsm_epyc7002/drivers/media/platform
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Ricardo Ribalda 1380f5754c [media] videobuf2: Add missing lock held on vb2_fop_release 
vb2_fop_release does not hold the lock although it is modifying the
queue->owner field.
This could lead to race conditions on the vb2_perform_io function
when multiple applications are accessing the video device via
read/write API:
[ 308.297741] BUG: unable to handle kernel NULL pointer dereference at
0000000000000260
[ 308.297759] IP: [<ffffffffa07a9fd2>] vb2_perform_fileio+0x372/0x610
[videobuf2_core]
[ 308.297794] PGD 159719067 PUD 158119067 PMD 0
[ 308.297812] Oops: 0000 #1 SMP
[ 308.297826] Modules linked in: qt5023_video videobuf2_dma_sg
qtec_xform videobuf2_vmalloc videobuf2_memops videobuf2_core
qtec_white qtec_mem gpio_xilinx qtec_cmosis qtec_pcie fglrx(PO)
spi_xilinx spi_bitbang qt5023
[ 308.297888] CPU: 1 PID: 2189 Comm: java Tainted: P O 3.11.0-qtec-standard #1
[ 308.297919] Hardware name: QTechnology QT5022/QT5022, BIOS
PM_2.1.0.309 X64 05/23/2013
[ 308.297952] task: ffff8801564e1690 ti: ffff88014dc02000 task.ti:
ffff88014dc02000
[ 308.297962] RIP: 0010:[<ffffffffa07a9fd2>] [<ffffffffa07a9fd2>]
vb2_perform_fileio+0x372/0x610 [videobuf2_core]
[ 308.297985] RSP: 0018:ffff88014dc03df8 EFLAGS: 00010202
[ 308.297995] RAX: 0000000000000000 RBX: ffff880158a23000 RCX: dead000000100100
[ 308.298003] RDX: 0000000000000000 RSI: dead000000200200 RDI: 0000000000000000
[ 308.298012] RBP: ffff88014dc03e58 R08: 0000000000000000 R09: 0000000000000001
[ 308.298020] R10: ffffea00051e8380 R11: ffff88014dc03fd8 R12: ffff880158a23070
[ 308.298029] R13: ffff8801549040b8 R14: 0000000000198000 R15: 0000000001887e60
[ 308.298040] FS: 00007f65130d5700(0000) GS:ffff88015ed00000(0000)
knlGS:0000000000000000
[ 308.298049] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 308.298057] CR2: 0000000000000260 CR3: 0000000159630000 CR4: 00000000000007e0
[ 308.298064] Stack:
[ 308.298071] ffff880156416c00 0000000000198000 0000000000000000
ffff880100000001
[ 308.298087] ffff88014dc03f50 00000000810a79ca 0002000000000001
ffff880154904718
[ 308.298101] ffff880156416c00 0000000000198000 ffff880154904338
ffff88014dc03f50
[ 308.298116] Call Trace:
[ 308.298143] [<ffffffffa07aa3c4>] vb2_read+0x14/0x20 [videobuf2_core]
[ 308.298198] [<ffffffffa07aa494>] vb2_fop_read+0xc4/0x120 [videobuf2_core]
[ 308.298252] [<ffffffff8154ee9e>] v4l2_read+0x7e/0xc0
[ 308.298296] [<ffffffff8116e639>] vfs_read+0xa9/0x160
[ 308.298312] [<ffffffff8116e882>] SyS_read+0x52/0xb0
[ 308.298328] [<ffffffff81784179>] tracesys+0xd0/0xd5
[ 308.298335] Code: e5 d6 ff ff 83 3d be 24 00 00 04 89 c2 4c 8b 45 b0
44 8b 4d b8 0f 8f 20 02 00 00 85 d2 75 32 83 83 78 03 00 00 01 4b 8b
44 c5 48 <8b> 88 60 02 00 00 85 c9 0f 84 b0 00 00 00 8b 40 58 89 c2 41
89
[ 308.298487] RIP [<ffffffffa07a9fd2>] vb2_perform_fileio+0x372/0x610
[videobuf2_core]
[ 308.298507] RSP <ffff88014dc03df8>
[ 308.298514] CR2: 0000000000000260
[ 308.298526] ---[ end trace e8f01717c96d1e41 ]---

Signed-off-by: Ricardo Ribalda <ricardo.ribalda@gmail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2013-12-09 11:43:07 -02:00
..
blackfin tree-wide: use reinit_completion instead of INIT_COMPLETION 2013-11-15 09:32:21 +09:00
davinci [media] davinci: remove deprecated IRQF_DISABLED 2013-10-03 14:11:18 -03:00
exynos4-is [media] videobuf2: Add missing lock held on vb2_fop_release 2013-12-09 11:43:07 -02:00
exynos-gsc [media] exynos-gsc: Handle ctx job finish when aborted 2013-10-28 15:21:58 -02:00
marvell-ccic [media] media: marvell-ccic: use devm to release clk 2013-11-29 14:46:47 -02:00
omap [media] omap_vout: fix compiler warning 2013-06-28 15:06:49 -03:00
omap3isp [media] omap3isp: Add resizer data rate configuration to resizer_link_validate 2013-12-04 15:14:30 -02:00
s3c-camif [media] s3c-camif: forever loop in camif_hw_set_source_format() 2013-08-24 04:53:58 -03:00
s5p-g2d [media] s5p-g2d: Use mem-to-mem ioctl helpers 2013-12-04 15:45:24 -02:00
s5p-jpeg [media] s5p-jpeg: Use mem-to-mem ioctl helpers 2013-12-04 15:44:23 -02:00
s5p-mfc [media] media_tree: Fix spelling errors 2013-11-29 14:43:50 -02:00
s5p-tv [media] s5p-tv: mixer: Prepare for common clock framework 2013-12-04 15:50:16 -02:00
soc_camera [media] media_tree: Fix spelling errors 2013-11-29 14:43:50 -02:00
ti-vpe [media] v4l: ti-vpe: Add de-interlacer support in VPE 2013-10-28 15:19:38 -02:00
vsp1 [media] media_tree: Fix spelling errors 2013-11-29 14:43:50 -02:00
arv.c
coda.c [media] media_tree: Fix spelling errors 2013-11-29 14:43:50 -02:00
coda.h [media] coda: add CODA7541 decoding support 2013-07-31 15:56:44 -03:00
fsl-viu.c drivers: clean-up prom.h implicit includes 2013-10-09 20:04:04 -05:00
indycam.c [media] indycam: remove g_chip_ident op 2013-06-17 08:49:47 -03:00
indycam.h
Kconfig Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2013-11-18 15:08:02 -08:00
m2m-deinterlace.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-11-20 13:20:24 -08:00
Makefile [media] v4l: ti-vpe: Add VPE mem to mem driver 2013-10-28 15:17:30 -02:00
mem2mem_testdev.c [media] mem2mem_testdev: Use mem-to-mem ioctl and vb2 helpers 2013-12-04 15:35:22 -02:00
mx2_emmaprp.c [media] mem2mem: set missing v4l2_dev pointer 2013-06-28 15:09:43 -03:00
omap24xxcam-dma.c
omap24xxcam.c [media] omap24xxcam: add v4l2_device and replace parent with v4l2_dev 2013-06-21 11:05:16 -03:00
omap24xxcam.h [media] omap24xxcam: add v4l2_device and replace parent with v4l2_dev 2013-06-21 11:05:16 -03:00
sh_veu.c sh_veu: Replace PTR_RET with PTR_ERR_OR_ZERO 2013-07-16 16:06:01 +09:30
sh_vou.c [media] sh_vou: almost forever loop in sh_vou_try_fmt_vid_out() 2013-09-24 13:33:06 -03:00
timblogiw.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-11-20 13:20:24 -08:00
via-camera.c [media] via-camera: replace current_norm by g_std 2013-06-17 09:33:49 -03:00
via-camera.h
vino.c [media] v4l2: pass std by value to the write-only s_std ioctl 2013-03-24 06:47:00 -03:00
vino.h
vivi.c [media] media_tree: Fix spelling errors 2013-11-29 14:43:50 -02:00