From c95857a4237d7a0c55378a44f51d2d809f3bc8f5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 15 Jul 2019 00:35:47 +0200 Subject: [PATCH] avcodec/ffwavesynth: Check sample rate before use Fixes: division by zero Fixes: 15725/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5641231956180992 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 793eada7a5..1dbfaa5847 100644 --- a/libavcodec/ffwavesynth.c +++ b/libavcodec/ffwavesynth.c @@ -270,7 +270,7 @@ static int wavesynth_parse_extradata(AVCodecContext *avc) dt = in->ts_end - in->ts_start; switch (in->type) { case WS_SINE: - if (edata_end - edata < 20) + if (edata_end - edata < 20 || avc->sample_rate <= 0) return AVERROR(EINVAL); f1 = AV_RL32(edata + 0); f2 = AV_RL32(edata + 4);