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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-18 11:56:53 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 11:41:35 +0200 |
| commit | 42b28565aa852b98d95d8d02f7b0781999f9d533 (patch) | |
| tree | 5aa7c674d84b2df7ac6df57aba1667e603e03a46 | |
| parent | 10cc82c35baabbb07ffec3faccb04d8928c39e4c (diff) | |
avutil/avsscanf: Add () to avoid integer overflow in scanexp()
Fixes: signed integer overflow: 2147483610 + 52 cannot be represented in type 'int'
Fixes: 23260/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PBM_fuzzer-5187871274434560
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/avsscanf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavutil/avsscanf.c b/libavutil/avsscanf.c index 1c85412fd4..850c117940 100644 --- a/libavutil/avsscanf.c +++ b/libavutil/avsscanf.c @@ -229,9 +229,9 @@ static long long scanexp(FFFILE *f, int pok) return LLONG_MIN; } for (x=0; c-'0'<10U && x<INT_MAX/10; c = shgetc(f)) - x = 10*x + c-'0'; + x = 10*x + (c-'0'); for (y=x; c-'0'<10U && y<LLONG_MAX/100; c = shgetc(f)) - y = 10*y + c-'0'; + y = 10*y + (c-'0'); for (; c-'0'<10U; c = shgetc(f)); shunget(f); return neg ? -y : y; |