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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-04-27 20:53:32 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:54:52 +0200 |
| commit | 55922a70d9fc074ac143842e19e93ee63b7cb8bd (patch) | |
| tree | 4d744e96df26849aa9fa3ed03a79e738ad584b30 | |
| parent | d92939f984ccd28f361599c6f8ebe80f0c41a7fa (diff) | |
| download | ffmpeg-55922a70d9fc074ac143842e19e93ee63b7cb8bd.tar.gz | |
avformat/sbgdec: Check for overflow in timestamp preparation
Fixes: signed integer overflow: 9223372036854775807 + 86400000000 cannot be represented in type 'long'
Fixes: 29102/clusterfuzz-testcase-minimized-ffmpeg_dem_SBG_fuzzer-6731040263634944
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 9dbed908403b0d97ae70881fab68020f148b6b11)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/sbgdec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavformat/sbgdec.c b/libavformat/sbgdec.c index 646c141ab4..586a0c58f8 100644 --- a/libavformat/sbgdec.c +++ b/libavformat/sbgdec.c @@ -1281,6 +1281,10 @@ static int generate_intervals(void *log, struct sbg_script *s, int sample_rate, ev1 = &s->events[i]; ev2 = &s->events[(i + 1) % s->nb_events]; ev1->ts_int = ev1->ts; + + if (!ev1->fade.slide && ev1 >= ev2 && ev2->ts > INT64_MAX - period) + return AVERROR_INVALIDDATA; + ev1->ts_trans = ev1->fade.slide ? ev1->ts : ev2->ts + (ev1 < ev2 ? 0 : period); } |