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avcodec/jpeg2000dsp: Fix multiple integer overflows in ict_int()

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Fixes: runtime error: signed integer overflow: 22553 * -188962 cannot be represented in type 'int'
Fixes: 3042/clusterfuzz-testcase-minimized-5174210131394560

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-09-08 23:29:12 +02:00
parent f0efd795f4
commit 2d025e7428
1 changed files with 2 additions and 2 deletions
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4
libavcodec/jpeg2000dsp.c
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@ -65,9 +65,9 @@ static void ict_int(void *_src0, void *_src1, void *_src2, int csize)
for (i = 0; i < csize; i++) {
i0 = *src0 + *src2 + (((26345 * *src2) + (1 << 15)) >> 16);
i1 = *src0 - (((i_ict_params[1] * *src1) + (1 << 15)) >> 16)
i1 = *src0 - ((int)(((unsigned)i_ict_params[1] * *src1) + (1 << 15)) >> 16)
- (((i_ict_params[2] * *src2) + (1 << 15)) >> 16);
i2 = *src0 + (2 * *src1) + (((-14942 * *src1) + (1 << 15)) >> 16);
i2 = *src0 + (2 * *src1) + ((int)((-14942U * *src1) + (1 << 15)) >> 16);
*src0++ = i0;
*src1++ = i1;
*src2++ = i2;