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avcodec/ffwavesynth: Fix integer overflow in wavesynth_synth_sample / WS_SINE 

Fixes: signed integer overflow: -1429092 * -32596 cannot be represented in type 'int'
Fixes: 24419/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5157849974702080

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>
This commit is contained in:
Michael Niedermayer 2020-09-05 17:58:53 +02:00
parent 98ea1a662e
commit a0da95df77
1 changed files with 1 additions and 1 deletions
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2
libavcodec/ffwavesynth.c
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@ -373,7 +373,7 @@ static void wavesynth_synth_sample(struct wavesynth_context *ws, int64_t ts,
in->amp += in->damp;
switch (in->type) {
case WS_SINE:
val = amp * ws->sin[in->phi >> (64 - SIN_BITS)];
val = amp * (unsigned)ws->sin[in->phi >> (64 - SIN_BITS)];
in->phi += in->dphi;
in->dphi += in->ddphi;
break;