ffmpeg | branch: release/4.4 | Michael Niedermayer <mich...@niedermayer.cc> | Mon Aug 15 00:02:37 2022 +0200| [eb252776d8d06fe69aa635acdf36e0210d350035] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> (cherry picked from commit ca4ff9c21cb77e024fa4ff5889826a8bee4d0e0a) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=eb252776d8d06fe69aa635acdf36e0210d350035 --- libavcodec/h263dec.c | 2 ++ 1 file changed, 2 insertions(+) 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)) _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
