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| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2022-03-21 11:33:56 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-09-27 11:24:43 +0300 |
| commit | 4e768c8e34e639cff66a0f175bc4aebf472e4305 (patch) | |
| tree | 10fc6a9eaeb1bfe9a68756398eec46ca3c1ebac3 /drivers/media | |
| parent | 150f7b11cb59670a147e88580a604ce3c6845a88 (diff) | |
| download | linux-4e768c8e34e639cff66a0f175bc4aebf472e4305.tar.xz | |
media: v4l2-compat-ioctl32.c: zero buffer passed to v4l2_compat_get_array_args()
The v4l2_compat_get_array_args() function can leave uninitialized memory in the
buffer it is passed. So zero it before copying array elements from userspace
into the buffer.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+ff18193ff05f3f87f226@syzkaller.appspotmail.com
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c index 0f3d6b5667b0..55c26e7d370e 100644 --- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c +++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c @@ -1040,6 +1040,8 @@ int v4l2_compat_get_array_args(struct file *file, void *mbuf, { int err = 0; + memset(mbuf, 0, array_size); + switch (cmd) { case VIDIOC_G_FMT32: case VIDIOC_S_FMT32: |