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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-06-03 22:26:41 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
| commit | 9f352dc52d93399189b6ed86e09a334515f94553 (patch) | |
| tree | 4d5e019d655c3f6ea14c5d421e64f69d8a0c753b | |
| parent | c8174013f2205acf8367392596c75d76d6405271 (diff) | |
| download | ffmpeg-9f352dc52d93399189b6ed86e09a334515f94553.tar.gz | |
avformat/jacosubdec: Check for min in t overflow in get_shift()
Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 34651/clusterfuzz-testcase-minimized-ffmpeg_dem_JACOSUB_fuzzer-5157941012463616
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 989febfbd0c986e9e3e0f269a6b22778bf79147b)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/jacosubdec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/jacosubdec.c b/libavformat/jacosubdec.c index 070d1eeb5f..0dd046d213 100644 --- a/libavformat/jacosubdec.c +++ b/libavformat/jacosubdec.c @@ -140,6 +140,9 @@ static int get_shift(int timeres, const char *buf) int n = sscanf(buf, "%d"SSEP"%d"SSEP"%d"SSEP"%d", &a, &b, &c, &d); #undef SSEP + if (a == INT_MIN) + return 0; + if (*buf == '-' || a < 0) { sign = -1; a = FFABS(a); |