From bcc19ab7b7d14b7087602bb8e7944035d9493f9a Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
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 <michael@niedermayer.cc>
(cherry picked from commit f57e97dfd9539bc3f4f97a76ebc001f0b055cb88)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
libavformat/utils.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 27071e10b4..17c85e0aaa 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2884,6 +2884,7 @@ 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));