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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-09-30 21:18:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-10-03 20:09:51 +0200 |
| commit | a9137110eda130ba07a2a43bdedff2421efbb7a9 (patch) | |
| tree | 9cbc4e49efeb55abf7072fb19c2a2d04e58124dc /libavformat | |
| parent | dedc78b4b5bdab869f3038798334639d617d2309 (diff) | |
| download | ffmpeg-a9137110eda130ba07a2a43bdedff2421efbb7a9.tar.gz | |
avformat/sbgdec: Check for period overflow
Fixes: signed integer overflow: 4481246996173000000 - -4778576820000000000 cannot be represented in type 'long'
Fixes: 51896/clusterfuzz-testcase-minimized-ffmpeg_dem_SBG_fuzzer-5063670588899328
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/sbgdec.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavformat/sbgdec.c b/libavformat/sbgdec.c index c1995759a8..73b5be9007 100644 --- a/libavformat/sbgdec.c +++ b/libavformat/sbgdec.c @@ -1273,7 +1273,10 @@ static int generate_intervals(void *log, struct sbg_script *s, int sample_rate, /* SBaGen handles the time before and after the extremal events, and the corresponding transitions, as if the sequence were cyclic with a 24-hours period. */ - period = s->events[s->nb_events - 1].ts - s->events[0].ts; + period = s->events[s->nb_events - 1].ts - (uint64_t)s->events[0].ts; + if (period < 0) + return AVERROR_INVALIDDATA; + period = (period + (DAY_TS - 1)) / DAY_TS * DAY_TS; period = FFMAX(period, DAY_TS); |