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avcodec/ffwavesynth: Check if there is enough extradata before allocation

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Fixes: OOM
Fixes: 15750/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5702090367696896

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 2019-07-15 00:35:49 +02:00
parent f4605770af
commit 65bac4a782
1 changed files with 1 additions and 1 deletions
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libavcodec/ffwavesynth.c
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@ -247,7 +247,7 @@ static int wavesynth_parse_extradata(AVCodecContext *avc)
edata_end = edata + avc->extradata_size; edata_end = edata + avc->extradata_size;
ws->nb_inter = AV_RL32(edata); ws->nb_inter = AV_RL32(edata);
edata += 4; edata += 4;
if (ws->nb_inter < 0) if (ws->nb_inter < 0 || (edata_end - edata) / 24 < ws->nb_inter)
return AVERROR(EINVAL); return AVERROR(EINVAL);
ws->inter = av_calloc(ws->nb_inter, sizeof(*ws->inter)); ws->inter = av_calloc(ws->nb_inter, sizeof(*ws->inter));
if (!ws->inter) if (!ws->inter)