[FFmpeg-cvslog] avformat/utils: Fix integer overflow of fps_first/last_dts
Michael Niedermayer
git at videolan.org
Wed Mar 7 21:38:10 EET 2018
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Wed Mar 7 00:10:11 2018 +0100| [1b1362e408cd6acb63fef126b814b0d16562aa8e] | committer: Michael Niedermayer
avformat/utils: Fix integer overflow of fps_first/last_dts
Fixes: runtime error: signed integer overflow: 7738135736989908991 - -7898362169240453118 cannot be represented in type 'long'
Fixes: Chromium bug 796778
Reported-by: Matt Wolenetz <wolenetz at google.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1b1362e408cd6acb63fef126b814b0d16562aa8e
---
libavformat/utils.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 3ca1ca2441..4d0b56c2a8 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -3778,7 +3778,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
(pkt->dts - st->info->fps_last_dts) / 1000 >
- (st->info->fps_last_dts - st->info->fps_first_dts) /
+ (st->info->fps_last_dts - (uint64_t)st->info->fps_first_dts) /
(st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
av_log(ic, AV_LOG_WARNING,
"DTS discontinuity in stream %d: packet %d with DTS "
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