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avformat/oggdec: Fix integer overflow with invalid pts

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If negative pts are possible for some codecs in ogg then the code needs to be
changed to use signed values.

Found-by: Thomas Guilbert <tguilbert@google.com>
Fixes: clusterfuzz_usan-2016-08-02
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit c5cc3b08e56fc95665977544486bd9f06e4b7a72)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-08-03 13:34:40 +02:00
parent 7876fd679d
commit 2a8441e949
1 changed files with 5 additions and 0 deletions
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5
libavformat/oggdec.h
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@ -162,6 +162,11 @@ ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts)
if (dts)
*dts = pts;
}
if (pts > INT64_MAX && pts != AV_NOPTS_VALUE) {
// The return type is unsigned, we thus cannot return negative pts
av_log(s, AV_LOG_ERROR, "invalid pts %"PRId64"\n", pts);
pts = AV_NOPTS_VALUE;
}
return pts;
}