Hi Wei,
On 8/10/23 11:23, Wei Chen wrote:
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: 4e855a6efa54 ("[media] vcodec: mediatek: Add Mediatek V4L2 Video Encoder Driver") Signed-off-by: Wei Chen harperchen1110@gmail.com Cc: stable@vger.kernel.org
Changes in v2:
- Add Fixes tag and CC stable email address
I guess stable needs to be added by the maintainer, not by the submitter
- Change the title to be more expressive
Subject message should include mediatek I believe, as `media: vcodec:` does not reference the mediatek vcodec.
drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c index 9ff439a50f53..9e8817863cb8 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc.c @@ -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;
Have you run v4l2-compliance on the device to make sure nothing is broken ?
for (i = 0; i < *nplanes; i++) if (sizes[i] < q_data->sizeimage[i]) return -EINVAL;
Greetings,