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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-05-15 17:06:59 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-05-21 01:38:56 +0200 |
| commit | 56e76bd0579cc7f7b28860885d9e569a39daf41b (patch) | |
| tree | 6adfb4af0dd09aed588683805e4e926d65416b22 | |
| parent | fac5849915973ac09286d2c027237bfd99cc27fe (diff) | |
| download | ffmpeg-56e76bd0579cc7f7b28860885d9e569a39daf41b.tar.gz | |
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 <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mov.c | 3 |
1 files changed, 3 insertions, 0 deletions
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; |