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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-22 19:13:01 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-04 23:34:29 +0100 |
| commit | 4f70e1ec0cfa8ae24b224faf522c1d6ca95a42f6 (patch) | |
| tree | b5f4bc4095e75bab010da3f4831e835804ab5539 | |
| parent | 4dfb7ff528c02afbafba14676c139ecb82164c44 (diff) | |
| download | ffmpeg-4f70e1ec0cfa8ae24b224faf522c1d6ca95a42f6.tar.gz | |
avformat/mov: Use av_mul_q() to avoid integer overflows
Fixes: signed integer overflow: 538976288 * 538976288 cannot be represented in type 'int'
Fixes: 27473/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5758978289827840
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/mov.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c index ad0b9a58d3..8eacf2cc04 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -2354,12 +2354,10 @@ FF_ENABLE_DEPRECATION_WARNINGS if (tmcd_ctx->tmcd_flags & 0x0008) { int timescale = AV_RB32(st->codecpar->extradata + 8); int framedur = AV_RB32(st->codecpar->extradata + 12); - st->avg_frame_rate.num *= timescale; - st->avg_frame_rate.den *= framedur; + st->avg_frame_rate = av_mul_q(st->avg_frame_rate, (AVRational){timescale, framedur}); #if FF_API_LAVF_AVCTX FF_DISABLE_DEPRECATION_WARNINGS - st->codec->time_base.den *= timescale; - st->codec->time_base.num *= framedur; + st->codec->time_base = av_mul_q(st->codec->time_base , (AVRational){framedur, timescale}); FF_ENABLE_DEPRECATION_WARNINGS #endif } |