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Subject: media: vcodec: Fix potential array out-of-bounds in encoder queue_setup
Author: Wei Chen <harperchen1110@xxxxxxxxx>
Date: Thu Aug 10 08:23:33 2023 +0000
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@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
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..315e97a2450e 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;
for (i = 0; i < *nplanes; i++)
if (sizes[i] < q_data->sizeimage[i])
return -EINVAL;
