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

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

 /**