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avcodec/jpeg2000dwt: Fix integer overflow in dwt_decode97_int()

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Fixes: runtime error: signed integer overflow: 2147483598 + 128 cannot be represented in type 'int'
Fixes: 12926/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5705100733972480

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 2019-02-19 00:05:51 +01:00
parent 694d9d5368
commit 4801eea0d4
1 changed files with 1 additions and 1 deletions
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libavcodec/jpeg2000dwt.c
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@ -531,7 +531,7 @@ static void dwt_decode97_int(DWTContext *s, int32_t *t)
}
for (i = 0; i < w * h; i++)
data[i] = (data[i] + ((1<<I_PRESHIFT)>>1)) >> I_PRESHIFT;
data[i] = (data[i] + ((1LL<<I_PRESHIFT)>>1)) >> I_PRESHIFT;
}
int ff_jpeg2000_dwt_init(DWTContext *s, int border[2][2],