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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-28 21:31:16 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:20 +0200 |
| commit | 090893695e4347b871f2efd3285804a4e8a99ef4 (patch) | |
| tree | 1d95561a9fc7bd7751072c7843fb057de9fa932d | |
| parent | fa3dc72efcdf4da93cf816adebe497a321d535a5 (diff) | |
| download | ffmpeg-090893695e4347b871f2efd3285804a4e8a99ef4.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>
(cherry picked from commit 1b1905739638c22b476c99c679b41f29fa00bf07)
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 fa92df1ef9..39ba66d6be 100644 --- a/libavutil/timecode.c +++ b/libavutil/timecode.c @@ -49,7 +49,7 @@ 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) |