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avutil/fixed_dsp: Fix integer overflows in butterflies_fixed_c()

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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>
This commit is contained in:
Michael Niedermayer 2020-07-16 22:58:13 +02:00
parent 2fee883f52
commit d3bbc76f8e
1 changed files with 2 additions and 1 deletions
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libavutil/fixed_dsp.c
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@ -134,9 +134,10 @@ static int scalarproduct_fixed_c(const int *v1, const int *v2, int len)
return (int)(p >> 31);
}
static void butterflies_fixed_c(int *v1, int *v2, int len)
static void butterflies_fixed_c(int *v1s, int *v2, int len)
{
int i;
unsigned int *v1 = v1s;
for (i = 0; i < len; i++){
int t = v1[i] - v2[i];