diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-08-15 01:02:37 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-08-24 00:19:20 +0300 |
| commit | b2e0b0843f4760918d93d85bc0e17d1cd3b43287 (patch) | |
| tree | 1a15d8d411a2876092fde07f8bbaeb6670218f3d | |
| parent | 371fc3769bc633b978128e51a5953eea2276038b (diff) | |
avcodec/h263dec: Sanity check against minimal I/P frame size
Fixes: Timeout
Fixes: 49718/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-4874987894341632
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit ca4ff9c21cb77e024fa4ff5889826a8bee4d0e0a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/h263dec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c index 7659697d17..b13892ddbb 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -532,6 +532,8 @@ retry: avctx->has_b_frames = !s->low_delay; if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) { + if (s->pict_type != AV_PICTURE_TYPE_B && s->mb_num/2 > get_bits_left(&s->gb)) + return AVERROR_INVALIDDATA; if (ff_mpeg4_workaround_bugs(avctx) == 1) goto retry; } |