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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-11 22:44:36 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-03-28 14:20:00 +0200 |
| commit | 2c477be08a64a78ab0a358ae00e2f2dc746f2b47 (patch) | |
| tree | ac77bc8cea7ab11b031d6ff2cb230f849c90c2d3 | |
| parent | b5d8fe1c874947ca67ee8117b18f8052f0e590fc (diff) | |
| download | ffmpeg-2c477be08a64a78ab0a358ae00e2f2dc746f2b47.tar.gz | |
avformat/jacosubdec: Use 64bit intermediate for start/end timestamp shift
Fixes: signed integer overflow: -1957694447 + -1620425806 cannot be represented in type 'int'
Fixes: 30207/clusterfuzz-testcase-minimized-ffmpeg_dem_JACOSUB_fuzzer-5050791771635712
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/jacosubdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavformat/jacosubdec.c b/libavformat/jacosubdec.c index 828c33057f..9c6640eef8 100644 --- a/libavformat/jacosubdec.c +++ b/libavformat/jacosubdec.c @@ -125,8 +125,8 @@ static const char *read_ts(JACOsubContext *jacosub, const char *buf, return NULL; shift_and_ret: - ts_start64 = (ts_start + jacosub->shift) * 100LL / jacosub->timeres; - ts_end64 = (ts_end + jacosub->shift) * 100LL / jacosub->timeres; + ts_start64 = (ts_start + (int64_t)jacosub->shift) * 100LL / jacosub->timeres; + ts_end64 = (ts_end + (int64_t)jacosub->shift) * 100LL / jacosub->timeres; *start = ts_start64; *duration = ts_end64 - ts_start64; return buf + len; |