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avcodec/jpeg2000dwt: Fix integer overflow in dwt_decode97_int()

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Fixes: runtime error: signed integer overflow: -163654656 * 256 cannot be represented in type 'int'
Fixes: 2367/clusterfuzz-testcase-minimized-4648678897745920

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 ea5366670e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-06-26 15:05:08 +02:00
parent bbcb59b948
commit a6e90e5998
1 changed files with 1 additions and 1 deletions
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2
libavcodec/jpeg2000dwt.c
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@ -488,7 +488,7 @@ static void dwt_decode97_int(DWTContext *s, int32_t *t)
line += 5;
for (i = 0; i < w * h; i++)
data[i] *= 1 << I_PRESHIFT;
data[i] *= 1LL << I_PRESHIFT;
for (lev = 0; lev < s->ndeclevels; lev++) {
int lh = s->linelen[lev][0],