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avutil/fixed_dsp: Fix integer overflows in butterflies_fixed_c()
Fixes: signed integer overflow: 0 - -2147483648 cannot be represented in type 'int' Fixes: 23646/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_FIXED_fuzzer-5480991098667008 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 4a02ae49c26395fc3ae2d38c733a2a13bd3080e7) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -134,9 +134,10 @@ static int scalarproduct_fixed_c(const int *v1, const int *v2, int len)
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return (int)(p >> 31);
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}
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static void butterflies_fixed_c(int *v1, int *v2, int len)
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static void butterflies_fixed_c(int *v1s, int *v2, int len)
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{
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int i;
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unsigned int *v1 = v1s;
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for (i = 0; i < len; i++){
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int t = v1[i] - v2[i];
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