avutil/timecode: Avoid fps overflow
Fixes: Integer overflow and division by 0 Fixes: poc-202102-div.mov Found-by: 1vanChen of NSFOCUS Security Team Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -114,8 +114,8 @@ char *av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum)
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}
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}
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ff = framenum % fps;
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ff = framenum % fps;
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ss = framenum / fps % 60;
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ss = framenum / fps % 60;
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mm = framenum / (fps*60) % 60;
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mm = framenum / (fps*60LL) % 60;
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hh = framenum / (fps*3600);
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hh = framenum / (fps*3600LL);
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if (tc->flags & AV_TIMECODE_FLAG_24HOURSMAX)
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if (tc->flags & AV_TIMECODE_FLAG_24HOURSMAX)
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hh = hh % 24;
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hh = hh % 24;
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snprintf(buf, AV_TIMECODE_STR_SIZE, "%s%02d:%02d:%02d%c%02d",
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snprintf(buf, AV_TIMECODE_STR_SIZE, "%s%02d:%02d:%02d%c%02d",
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