diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-23 01:01:53 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-27 12:43:51 +0200 |
| commit | b6fbbe08c325415cc784df296058beb6604f0b9c (patch) | |
| tree | 4e8a72c5c87c407967016a22c693cc3f5f571769 | |
| parent | 42fdf402a79a1af4c500757106abfb9154bbcd42 (diff) | |
avformat/mvdec: Fix integer overflow with billions of channels
Fixes: signed integer overflow: 1394614304 * 2 cannot be represented in type 'int'
Fixes: 23491/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5697377020411904
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mvdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c index 64166a84b1..d5b400213d 100644 --- a/libavformat/mvdec.c +++ b/libavformat/mvdec.c @@ -268,7 +268,7 @@ static void read_index(AVIOContext *pb, AVStream *st) avio_skip(pb, 8); av_add_index_entry(st, pos, timestamp, size, 0, AVINDEX_KEYFRAME); if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) { - timestamp += size / (st->codecpar->channels * 2); + timestamp += size / (st->codecpar->channels * 2LL); } else { timestamp++; } @@ -355,7 +355,7 @@ 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 * 2); + timestamp += asize / (ast->codecpar->channels * 2LL); } } else if (!version && avio_rb16(pb) == 3) { avio_skip(pb, 4); |