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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-01-28 02:29:00 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-19 02:40:54 +0100 |
| commit | 78b1d57a4bc4337816dd5e88b6c2fab20cefdefb (patch) | |
| tree | a6e4d4512c271f5827decc04b394af8bea2e4964 | |
| parent | 5d06804b313677c149f106a8dba97988ad064385 (diff) | |
| download | ffmpeg-78b1d57a4bc4337816dd5e88b6c2fab20cefdefb.tar.gz | |
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>
| -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 eff809aafc..19ab1ef288 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -459,7 +459,7 @@ 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; |