mirror of https://git.ffmpeg.org/ffmpeg.git
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>
(cherry picked from commit c85bf16318
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -281,7 +281,7 @@ static int wavesynth_parse_extradata(AVCodecContext *avc)
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dphi1 = frac64(f1, (int64_t)avc->sample_rate << 16);
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dphi2 = frac64(f2, (int64_t)avc->sample_rate << 16);
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in->dphi0 = dphi1;
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in->ddphi = (dphi2 - dphi1) / dt;
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in->ddphi = (int64_t)(dphi2 - (uint64_t)dphi1) / dt;
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if (phi & 0x80000000) {
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phi &= ~0x80000000;
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if (phi >= i)
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