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avcodec/ffwavesynth: Check ts_end - ts_start for overflow

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Fixes: signed integer overflow: 2314885530818453536 - -8926099139098304480 cannot be represented in type 'long'
Fixes: 15259/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFWAVESYNTH_fuzzer-5764366093254656

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-06-16 16:12:42 +02:00
parent 507ca66ee4
commit 2db7a3bc4a
1 changed files with 4 additions and 1 deletions
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5
libavcodec/ffwavesynth.c
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@ -267,7 +267,10 @@ static int wavesynth_parse_extradata(AVCodecContext *avc)
in->type = AV_RL32(edata + 16); in->type = AV_RL32(edata + 16);
in->channels = AV_RL32(edata + 20); in->channels = AV_RL32(edata + 20);
edata += 24; edata += 24;
if (in->ts_start < cur_ts || in->ts_end <= in->ts_start) if (in->ts_start < cur_ts ||
in->ts_end <= in->ts_start ||
(uint64_t)in->ts_end - in->ts_start > INT64_MAX
)
return AVERROR(EINVAL); return AVERROR(EINVAL);
cur_ts = in->ts_start; cur_ts = in->ts_start;
dt = in->ts_end - in->ts_start; dt = in->ts_end - in->ts_start;