Message ID | 20180128012902.22504-1-michael@niedermayer.cc |
---|---|
State | New |
Headers | show |
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 12755b5e8a..ba332de531 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -465,7 +465,7 @@ int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx) } mb_num = get_bits(&s->gb, mb_num_bits); - if (mb_num >= s->mb_num) { + if (mb_num >= s->mb_num || !mb_num) { av_log(s->avctx, AV_LOG_ERROR, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num); return -1;
The spec implies that 0 is invalid in addition to the existing checks Found-by: <kierank> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/mpeg4videodec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)