diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-08-15 01:02:37 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-25 14:51:51 +0300 |
| commit | eb252776d8d06fe69aa635acdf36e0210d350035 (patch) | |
| tree | 7736d5594c163f019898d47fd7a1719762f0e220 | |
| parent | 5b9b498e1ba6a814f3e483ecc8f6644a5f67c1aa (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 e8b4d83e6e..f6f7789cef 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -545,6 +545,8 @@ 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)) |