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Fix calloc() overflow

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* malloc.c (calloc): Check multiplication overflow in calloc(),
assuming REDIRECT_MALLOC.
This commit is contained in:
Xi Wang
2012-03-15 04:46:49 +08:00
committed by Ivan Maidanski
parent a268866404
commit e10c1eb990
1 changed files with 5 additions and 0 deletions
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malloc.c
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@@ -372,8 +372,13 @@ void * malloc(size_t lb)
}
#endif /* GC_LINUX_THREADS */
#ifndef SIZE_MAX
#define SIZE_MAX (~(size_t)0)
#endif
void * calloc(size_t n, size_t lb)
{
if (lb && n > SIZE_MAX / lb)
return NULL;
# if defined(GC_LINUX_THREADS) /* && !defined(USE_PROC_FOR_LIBRARIES) */
/* libpthread allocated some memory that is only pointed to by */
/* mmapped thread stacks. Make sure it's not collectable. */