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media: vcodec: Fix potential array out-of-bounds in encoder queue_setup 

variable *nplanes is provided by user via system call argument. The
possible value of q_data->fmt->num_planes is 1-3, while the value
of *nplanes can be 1-8. The array access by index i can cause array
out-of-bounds.

Fix this bug by checking *nplanes against the array size.

Fixes: 4e855a6efa ("[media] vcodec: mediatek: Add Mediatek V4L2 Video Encoder Driver")
Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Cc: stable@vger.kernel.org
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Wei Chen 2023-08-10 08:23:33 +00:00 committed by Hans Verkuil
parent 2908042a37
commit e7f2e65699
1 changed files with 2 additions and 0 deletions
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2
drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c
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@ -821,6 +821,8 @@ static int vb2ops_venc_queue_setup(struct vb2_queue *vq,
return -EINVAL;
if (*nplanes) {
if (*nplanes != q_data->fmt->num_planes)
return -EINVAL;
for (i = 0; i < *nplanes; i++)
if (sizes[i] < q_data->sizeimage[i])
return -EINVAL;