diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-01-28 04:29:00 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-01 01:47:15 +0300 |
| commit | 54a7d3efc436426f4e0f1180878ecdc6712854d3 (patch) | |
| tree | 55a8c4d247e256e4e22b01539df2ded9f90812b4 /libavcodec/mpeg4videodec.c | |
| parent | ed06873b7b2dcace1dd421d92c3aaee2a4d6b26d (diff) | |
avcodec/mpeg4videodec: Check mb_num also against 0
The spec implies that 0 is invalid in addition to the existing checks
Found-by: <kierank>
Reviewed-by: Kieran Kunhya <kieran618@googlemail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 05f4703a168a336363750e32bcfdd6f303fbdbc3)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/mpeg4videodec.c')
| -rw-r--r-- | libavcodec/mpeg4videodec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 7185844922..0d33c02daa 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -458,7 +458,7 @@ 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; |