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avformat/realtextdec: Avoid undefined overflow in the end of read_ts() 

Fixes: signed integer overflow: 234080282628234040 * 100 cannot be represented in type 'long long'
Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_REALTEXT_fuzzer-6649867065753600

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-16 23:37:41 +01:00
parent 0014249fd9
commit aa1b8e6898
1 changed files with 1 additions and 1 deletions
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libavformat/realtextdec.c
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@ -54,7 +54,7 @@ static int64_t read_ts(const char *s)
if (sscanf(s, "%u:%u.%u", &mm, &ss, &ms) == 3) return ( mm*60LL + ss) * 100LL + ms;
if (sscanf(s, "%u:%u" , &mm, &ss ) == 2) return ( mm*60LL + ss) * 100LL;
if (sscanf(s, "%u.%u", &ss, &ms) == 2) return ( ss) * 100LL + ms;
return strtol(s, NULL, 10) * 100LL;
return strtoll(s, NULL, 10) * 100ULL;
}
static int realtext_read_header(AVFormatContext *s)