ffmpeg | branch: release/2.8 | Michael Niedermayer <mich...@niedermayer.cc> | Tue May 15 17:06:59 2018 +0200| [674929cd46c76285f4d739c0436a75a5402dee61] | 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 <mich...@niedermayer.cc> (cherry picked from commit 56e76bd0579cc7f7b28860885d9e569a39daf41b) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=674929cd46c76285f4d739c0436a75a5402dee61 --- libavformat/mov.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/mov.c b/libavformat/mov.c index 5a2ab732d3..c85d3a6eda 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -2783,6 +2783,9 @@ 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 ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
