Message ID | 20180515150700.4638-1-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | 56e76bd0579cc7f7b28860885d9e569a39daf41b |
Headers | show |
diff --git a/libavformat/mov.c b/libavformat/mov.c index 1975011741..4848a106f2 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -3900,6 +3900,9 @@ 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;
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 <michael@niedermayer.cc> --- libavformat/mov.c | 3 +++ 1 file changed, 3 insertions(+)