Causes a divide-by-zero in the rare case where: - the file has an audio stream, - the first audio frame isn't within the first BRP_BASF_LOOKAHEAD frames, - an audio frame is encountered later, and - its chunk header (except num_blocks) contains all zeros (matching the uninitialised structure in the context)
The decoder will discard any garbage data, so the check isn't really needed. Fixes: division by 0 Fixes: 26667/clusterfuzz-testcase-minimized-ffmpeg_dem_ARGO_BRP_fuzzer-5645146928185344.fuzz Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Zane van Iperen <z...@zanevaniperen.com> --- libavformat/argo_brp.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/libavformat/argo_brp.c b/libavformat/argo_brp.c index 766d4fd261..6d6da851e9 100644 --- a/libavformat/argo_brp.c +++ b/libavformat/argo_brp.c @@ -392,9 +392,6 @@ static int argo_brp_read_packet(AVFormatContext *s, AVPacket *pkt) return AVERROR_INVALIDDATA; blk.size -= ASF_CHUNK_HEADER_SIZE; - - if (blk.size % st->codecpar->block_align != 0) - return AVERROR_INVALIDDATA; } if ((ret = av_get_packet(s->pb, pkt, blk.size)) < 0) -- 2.28.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
