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avformat/asfenc: Check pts 

Fixes integer overflow
Fixes: 0063df8be3aaa30dd6d76f59c8f818c8/signal_sigsegv_7b7b59_3634_bf418b6822bbfa68734411d96b667be3.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-01-12 18:49:20 +01:00
parent d73f0c586e
commit 7c0b84d899
1 changed files with 5 additions and 0 deletions
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5
libavformat/asfenc.c
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@ -964,6 +964,11 @@ static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
av_assert0(pts != AV_NOPTS_VALUE);
if ( pts < - PREROLL_TIME
|| pts > (INT_MAX-3)/10000LL * ASF_INDEXED_INTERVAL - PREROLL_TIME) {
av_log(s, AV_LOG_ERROR, "input pts %"PRId64" is invalid\n", pts);
return AVERROR(EINVAL);
}
pts *= 10000;
asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000);