From f57e97dfd9539bc3f4f97a76ebc001f0b055cb88 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 29 Jun 2019 23:23:25 +0200 Subject: [PATCH] avformat/utils: Check timebase before use in estimate_timings() Fixes: division by 0 Fixes: 15480/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5746727434321920 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/utils.c | 1 + 1 file changed, 1 insertion(+) diff --git a/libavformat/utils.c b/libavformat/utils.c index 886cd6fd83..180df782f0 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -2953,6 +2953,7 @@ static void estimate_timings(AVFormatContext *ic, int64_t old_offset) AVStream av_unused *st; for (i = 0; i < ic->nb_streams; i++) { st = ic->streams[i]; + if (st->time_base.den) av_log(ic, AV_LOG_TRACE, "stream %d: start_time: %0.3f duration: %0.3f\n", i, (double) st->start_time * av_q2d(st->time_base), (double) st->duration * av_q2d(st->time_base));