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opj_int_ceildiv(): fix int32 overflow. Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2494. Credit to OSS Fuzz

This commit is contained in:
Even Rouault 2017-07-28 22:15:47 +02:00
parent 361c4506fd
commit d6654d906c
1 changed files with 1 additions and 1 deletions
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src/lib/openjp2/opj_intmath.h
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@ -129,7 +129,7 @@ Divide an integer and round upwards
static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b) static INLINE OPJ_INT32 opj_int_ceildiv(OPJ_INT32 a, OPJ_INT32 b)
{ {
assert(b); assert(b);
return (a + b - 1) / b; return (OPJ_INT32)(((OPJ_INT64)a + b - 1) / b);
} }
/** /**