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avformat/oggparseopus: Check that granule pos is within the supported range

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Larger values would imply file durations of astronomic proportions and cause
overflows

Fixes integer overflow
Fixes: usan_int64_overflow

Found-by: Thomas Guilbert <tguilbert@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-05-10 23:12:58 +02:00
parent aeefe018f8
commit 8efaee3710
1 changed files with 4 additions and 0 deletions
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4
libavformat/oggparseopus.c
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@ -117,6 +117,10 @@ static int opus_packet(AVFormatContext *avf, int idx)
if (!os->psize)
return AVERROR_INVALIDDATA;
if (os->granule > INT64_MAX - UINT32_MAX) {
av_log(avf, AV_LOG_ERROR, "Unsupported huge granule pos %"PRId64 "\n", os->granule);
return AVERROR_INVALIDDATA;
}
if ((!os->lastpts || os->lastpts == AV_NOPTS_VALUE) && !(os->flags & OGG_FLAG_EOS)) {
int seg, d;