From a0da95df77a528251a326fc8b7e2ff48c60e41d0 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 5 Sep 2020 17:58:53 +0200 Subject: [PATCH] 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 Signed-off-by: Michael Niedermayer --- libavcodec/ffwavesynth.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/ffwavesynth.c b/libavcodec/ffwavesynth.c index 8d3ac81aefb..d92bb38c450 100644 --- a/libavcodec/ffwavesynth.c +++ b/libavcodec/ffwavesynth.c @@ -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; -- 2.39.5