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media: mediatek: vcodec: Fix potential array out-of-bounds in decoder 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.

Signed-off-by: Wei Chen <harperchen1110@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Wei Chen 2023-03-29 09:05:13 +01:00 committed by Mauro Carvalho Chehab
parent e2a10b3801
commit 8fbcf730cb
1 changed files with 7 additions and 0 deletions
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7
drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c
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@ -735,6 +735,13 @@ int vb2ops_vdec_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
}
if (*nplanes) {
if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
if (*nplanes != q_data->fmt->num_planes)
return -EINVAL;
} else {
if (*nplanes != 1)
return -EINVAL;
}
for (i = 0; i < *nplanes; i++) {
if (sizes[i] < q_data->sizeimage[i])
return -EINVAL;