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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-03-15 18:25:56 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-03-18 20:23:15 +0100 |
| commit | c85bf1631823e9089e59a474d5c6c0efc708c507 (patch) | |
| tree | 8f233283afffcf00bd460d89c37e6ed0ff0fc931 /libavcodec/ffwavesynth.c | |
| parent | 2e611cd9c042009fae49ef0f11f1086a5efd7021 (diff) | |
| download | ffmpeg-c85bf1631823e9089e59a474d5c6c0efc708c507.tar.gz | |
avcodec/ffwavesynth: Fix integer overflow in computation of ddphi
Fixes: signed integer overflow: 1302123111085380114 - -8319005078741256972 cannot be represented in type 'long'
Fixes: 20991/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5148554161291264
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/ffwavesynth.c')
| -rw-r--r-- | libavcodec/ffwavesynth.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/ffwavesynth.c b/libavcodec/ffwavesynth.c index b9c63abb8d..998e1a4ad6 100644 --- a/libavcodec/ffwavesynth.c +++ b/libavcodec/ffwavesynth.c @@ -281,7 +281,7 @@ static int wavesynth_parse_extradata(AVCodecContext *avc) dphi1 = frac64(f1, (int64_t)avc->sample_rate << 16); dphi2 = frac64(f2, (int64_t)avc->sample_rate << 16); in->dphi0 = dphi1; - in->ddphi = (dphi2 - dphi1) / dt; + in->ddphi = (int64_t)(dphi2 - (uint64_t)dphi1) / dt; if (phi & 0x80000000) { phi &= ~0x80000000; if (phi >= i) |