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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-12-15 18:37:13 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-12-16 21:06:47 +0100 |
| commit | 99b2700f5bf887cf95316a2f9e8c1082b11982ba (patch) | |
| tree | 30e84d7e2efea2a2bcc7313456e200fca42aeacf /libavformat | |
| parent | 9092e58c4469f5488f305fdb85e34e61bba7b04a (diff) | |
avformat/mvdec: Use 64 bit in timestamp computation
Fixes: division by zero
Fixes: 42198/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-5054366405492736.fuzz
Fixes: 42222/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-4561249331970048
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/mvdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c index 8b54a9ab04..5d184f20a4 100644 --- a/libavformat/mvdec.c +++ b/libavformat/mvdec.c @@ -381,7 +381,7 @@ static int mv_read_header(AVFormatContext *avctx) avio_skip(pb, 8); av_add_index_entry(ast, pos, timestamp, asize, 0, AVINDEX_KEYFRAME); av_add_index_entry(vst, pos + asize, i, vsize, 0, AVINDEX_KEYFRAME); - timestamp += asize / (ast->codecpar->channels * bytes_per_sample); + timestamp += asize / (ast->codecpar->channels * (uint64_t)bytes_per_sample); } } else if (!version && avio_rb16(pb) == 3) { avio_skip(pb, 4); |