4.14-stable review patch. If anyone has any objections, please let me know.
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From: Wei Chen harperchen1110@gmail.com
commit e7f2e65699e2290fd547ec12a17008764e5d9620 upstream.
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 Reviewed-by: Chen-Yu Tsai wenst@chromium.org Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c @@ -766,6 +766,8 @@ static int vb2ops_venc_queue_setup(struc 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;