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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-03-15 18:25:56 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-03 12:10:23 +0200 |
| commit | e121488dc85e11ae59e608e5d62e946e916ade18 (patch) | |
| tree | 91f6fd6bc87169b69974f0780ebb7156b4eaba2c | |
| parent | a3a3730b5456ca00587455004d40c047f7b20a99 (diff) | |
| download | ffmpeg-e121488dc85e11ae59e608e5d62e946e916ade18.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>
(cherry picked from commit c85bf1631823e9089e59a474d5c6c0efc708c507)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -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) |