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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-05-15 17:06:59 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-16 19:06:27 +0200 |
| commit | aa50d67cc7d07278ce39d395871bc6a0dc7cfe32 (patch) | |
| tree | d4825cf0a16a85ddc94f8a4a216c5714ce53632f | |
| parent | 05e253684ebc2985b0c4662a9f86e4475c20a5e4 (diff) | |
| download | ffmpeg-aa50d67cc7d07278ce39d395871bc6a0dc7cfe32.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>
(cherry picked from commit 56e76bd0579cc7f7b28860885d9e569a39daf41b)
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 11526346be..c4d3863de9 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -3516,6 +3516,9 @@ 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; |