diff options
| author | Michael Niedermayer <[email protected]> | 2022-08-15 00:02:37 +0200 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2022-08-23 20:03:03 +0200 |
| commit | ca4ff9c21cb77e024fa4ff5889826a8bee4d0e0a (patch) | |
| tree | ce38c4b1bd6bf7259296e54b80191ea822662a66 | |
| parent | 3b51e1992289383aa9f083c88e153e34b6412c89 (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 <[email protected]>
| -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 a14d7811f5..8728cfa6e9 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -546,6 +546,8 @@ 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; if (s->studio_profile != (s->idsp.idct == NULL)) |