On Fri, Jul 27, 2012 at 09:10:52PM +0600, Mashiat Sarker Shakkhar wrote:
> This fixes out of array writes
>
> Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
> Signed-off-by: Michael Niedermayer <[email protected]>
> ---
> libavcodec/vc1dec.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
> index 5b0fe46..851485c 100644
> --- a/libavcodec/vc1dec.c
> +++ b/libavcodec/vc1dec.c
> @@ -5577,6 +5577,10 @@ static int vc1_decode_frame(AVCodecContext *avctx,
> void *data,
> mb_height = s->mb_height >> v->field_mode;
> for (i = 0; i <= n_slices; i++) {
> if (i > 0 && slices[i - 1].mby_start >= mb_height) {
> + if (v->field_mode <= 0) {
> + av_log(v->s.avctx, AV_LOG_ERROR, "invalid end_mb_y
> %d\n", slices[i - 1].mby_start);
^^^-----------------------------^^^
> + continue;
> + }
> v->second_field = 1;
> v->blocks_off = s->mb_width * s->mb_height << 1;
> v->mb_off = s->mb_stride * s->mb_height >> 1;
> --
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
