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avformat/utils: avoid overflow in update_stream_timings() with huge durations

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Fixes: usan_granule_overflow

Found-by: Thomas Guilbert <tguilbert@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-05-28 23:51:35 +02:00
parent af56d0dffa
commit 2be3007ed5
1 changed files with 1 additions and 1 deletions
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libavformat/utils.c
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@ -2491,7 +2491,7 @@ static void update_stream_timings(AVFormatContext *ic)
end_time1 = av_rescale_q_rnd(st->duration, st->time_base, end_time1 = av_rescale_q_rnd(st->duration, st->time_base,
AV_TIME_BASE_Q, AV_TIME_BASE_Q,
AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX); AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
if (end_time1 != AV_NOPTS_VALUE) { if (end_time1 != AV_NOPTS_VALUE && start_time1 <= INT64_MAX - end_time1) {
end_time1 += start_time1; end_time1 += start_time1;
end_time = FFMAX(end_time, end_time1); end_time = FFMAX(end_time, end_time1);
} }