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avcodec/ffwavesynth: Fix undefined overflow in wavesynth_synth_sample()

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Fixes: signed integer overflow: 2147464192 + 21176 cannot be represented in type 'int'
Fixes: 19042/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5719828090585088

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit fa47f6412d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-11-25 21:50:57 +01:00
parent 099d4baba8
commit 7711b699eb
1 changed files with 2 additions and 1 deletions
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libavcodec/ffwavesynth.c
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@ -350,7 +350,8 @@ fail:
static void wavesynth_synth_sample(struct wavesynth_context *ws, int64_t ts, static void wavesynth_synth_sample(struct wavesynth_context *ws, int64_t ts,
int32_t *channels) int32_t *channels)
{ {
int32_t amp, val, *cv; int32_t amp, *cv;
unsigned val;
struct ws_interval *in; struct ws_interval *in;
int i, *last, pink; int i, *last, pink;
uint32_t c, all_ch = 0; uint32_t c, all_ch = 0;