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>
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@ -134,6 +134,9 @@ static int get_shift(int timeres, const char *buf)
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int n = sscanf(buf, "%d"SSEP"%d"SSEP"%d"SSEP"%d", &a, &b, &c, &d);
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int n = sscanf(buf, "%d"SSEP"%d"SSEP"%d"SSEP"%d", &a, &b, &c, &d);
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#undef SSEP
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#undef SSEP
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if (a == INT_MIN)
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return 0;
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if (*buf == '-' || a < 0) {
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if (*buf == '-' || a < 0) {
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sign = -1;
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sign = -1;
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a = FFABS(a);
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a = FFABS(a);
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