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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-04-24 16:37:34 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-06-18 18:58:25 +0200 |
| commit | ff05326081922059314b8927cf9bbc9c7e73458f (patch) | |
| tree | deb1faee607fd25594e643534612db9066cc22ee | |
| parent | 93d964689c3b2bae26e6e3f502c1ffc4c2e46989 (diff) | |
avformat/mccdec: Fix overflows in num/den
Fixes: signed integer overflow: 6365816 * 1000 cannot be represented in type 'int'
Fixes: 29102/clusterfuzz-testcase-minimized-ffmpeg_dem_MCC_fuzzer-6737934184218624
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-- | libavformat/mccdec.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/libavformat/mccdec.c b/libavformat/mccdec.c index a096ac6e93..10ed7c0dc1 100644 --- a/libavformat/mccdec.c +++ b/libavformat/mccdec.c @@ -127,8 +127,7 @@ static int mcc_read_header(AVFormatContext *s) num = strtol(rate_str, &df, 10); den = 1; if (df && !av_strncasecmp(df, "DF", 2)) { - num *= 1000; - den = 1001; + av_reduce(&num, &den, num * 1000LL, 1001, INT_MAX); } } |