ffmpeg | branch: release/4.0 | Michael Niedermayer <[email protected]> | Tue May 15 17:06:59 2018 +0200| [1d01a3b34c924998da310c4776af36047d1b7fde] | committer: Michael Niedermayer
avformat/mov: Break out early if chunk_count is 0 in mov_build_index() Without this some operations might overflow (undefined behavior) even though the index adding loop would never execute No testcase known Signed-off-by: Michael Niedermayer <[email protected]> (cherry picked from commit 56e76bd0579cc7f7b28860885d9e569a39daf41b) Signed-off-by: Michael Niedermayer <[email protected]> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1d01a3b34c924998da310c4776af36047d1b7fde --- libavformat/mov.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/mov.c b/libavformat/mov.c index 0667ba3ded..da0b1942b9 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -3899,6 +3899,9 @@ static void mov_build_index(MOVContext *mov, AVStream *st) } else { unsigned chunk_samples, total = 0; + if (!sc->chunk_count) + return; + // compute total chunk count for (i = 0; i < sc->stsc_count; i++) { unsigned count, chunk_count; _______________________________________________ ffmpeg-cvslog mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
