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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-28 21:31:16 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-19 00:05:50 +0100 |
| commit | 1b1905739638c22b476c99c679b41f29fa00bf07 (patch) | |
| tree | 7efdecbc5fc7afd7f6122265d7c0dbbb40fa627f | |
| parent | 8c9a5a0fe9f27be35332a2b8f604dc85d219a056 (diff) | |
| download | ffmpeg-1b1905739638c22b476c99c679b41f29fa00bf07.tar.gz | |
avutil/timecode: Avoid undefined behavior with large framenum
Fixes: signed integer overflow: 2147462079 + 2149596 cannot be represented in type 'int'
Fixes: 27565/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5091972813160448
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-- | libavutil/timecode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavutil/timecode.c b/libavutil/timecode.c index 5106f642b9..280e4cacfb 100644 --- a/libavutil/timecode.c +++ b/libavutil/timecode.c @@ -46,7 +46,7 @@ int av_timecode_adjust_ntsc_framenum2(int framenum, int fps) d = framenum / frames_per_10mins; m = framenum % frames_per_10mins; - return framenum + 9 * drop_frames * d + drop_frames * ((m - drop_frames) / (frames_per_10mins / 10)); + return framenum + 9U * drop_frames * d + drop_frames * ((m - drop_frames) / (frames_per_10mins / 10)); } uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int framenum) |