diff options
| author | Benoit Parrot <bparrot@ti.com> | 2019-10-07 18:09:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 14:37:05 +0300 |
| commit | b86957058be437d5be8832a3d627c9c08298dea6 (patch) | |
| tree | e2ad07e94999888de0cf9a7a8b1f045ac15f67fc | |
| parent | 95961770a970cad9a803da935c0ebe091eca6442 (diff) | |
| download | linux-b86957058be437d5be8832a3d627c9c08298dea6.tar.xz | |
media: ti-vpe: vpe: fix a v4l2-compliance failure causing a kernel panic
[ Upstream commit a37980ac5be29b83da67bf7d571c6bd9f90f8e45 ]
v4l2-compliance fails with this message:
warn: v4l2-test-formats.cpp(717): \
TRY_FMT cannot handle an invalid pixelformat.
test VIDIOC_TRY_FMT: FAIL
This causes the following kernel panic:
Unable to handle kernel paging request at virtual address 56595561
pgd = ecd80e00
*pgd=00000000
Internal error: Oops: 205 [#1] PREEMPT SMP ARM
...
CPU: 0 PID: 930 Comm: v4l2-compliance Not tainted \
4.14.62-01715-gc8cd67f49a19 #1
Hardware name: Generic DRA72X (Flattened Device Tree)
task: ece44d80 task.stack: ecc6e000
PC is at __vpe_try_fmt+0x18c/0x2a8 [ti_vpe]
LR is at 0x8
Because the driver fails to properly check the 'num_planes' values for
proper ranges it ends up accessing out of bound data causing the kernel
panic.
Since this driver only handle single or dual plane pixel format, make
sure the provided value does not exceed 2 planes.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/media/platform/ti-vpe/vpe.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c index a136fb14bf1a..5adafee98e4c 100644 --- a/drivers/media/platform/ti-vpe/vpe.c +++ b/drivers/media/platform/ti-vpe/vpe.c @@ -1663,7 +1663,7 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f, &pix->height, MIN_H, MAX_H, H_ALIGN, S_ALIGN); - if (!pix->num_planes) + if (!pix->num_planes || pix->num_planes > 2) pix->num_planes = fmt->coplanar ? 2 : 1; else if (pix->num_planes > 1 && !fmt->coplanar) pix->num_planes = 1; |