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avcodec/jpeg2000dsp: Fix integer overflows in ict_int()

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Fixes: signed integer overflow: 46802 * -71230 cannot be represented in type 'int'
Fixes: 4756/clusterfuzz-testcase-minimized-4812495563784192

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 2018-01-07 04:12:57 +01:00
parent ed03fad2cc
commit b3192c64b5
1 changed files with 2 additions and 2 deletions
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4
libavcodec/jpeg2000dsp.c
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@ -64,9 +64,9 @@ static void ict_int(void *_src0, void *_src1, void *_src2, int csize)
int i;
for (i = 0; i < csize; i++) {
i0 = *src0 + *src2 + (((26345 * *src2) + (1 << 15)) >> 16);
i0 = *src0 + *src2 + ((int)((26345U * *src2) + (1 << 15)) >> 16);
i1 = *src0 - ((int)(((unsigned)i_ict_params[1] * *src1) + (1 << 15)) >> 16)
- (((i_ict_params[2] * *src2) + (1 << 15)) >> 16);
- ((int)(((unsigned)i_ict_params[2] * *src2) + (1 << 15)) >> 16);
i2 = *src0 + (2 * *src1) + ((int)((-14942U * *src1) + (1 << 15)) >> 16);
*src0++ = i0;
*src1++ = i1;