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avformat/utils: avoid overflow in compute_chapters_end() 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>
(cherry picked from commit c1ed78a591f68f3c81eded0bfaac313937ffa3b6)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-05-28 23:51:35 +02:00
parent cc1e01d8b6
commit 7f864badc0
1 changed files with 1 additions and 1 deletions
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2
libavformat/utils.c
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@ -2919,7 +2919,7 @@ static void compute_chapters_end(AVFormatContext *s)
unsigned int i, j;
int64_t max_time = 0;
if (s->duration > 0)
if (s->duration > 0 && s->start_time < INT64_MAX - s->duration)
max_time = s->duration +
((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);