diff options
Diffstat (limited to 'malloc')
| -rw-r--r-- | malloc/mcheck.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/malloc/mcheck.c b/malloc/mcheck.c index 524acc755c..e2eb83f41d 100644 --- a/malloc/mcheck.c +++ b/malloc/mcheck.c @@ -1,5 +1,6 @@ /* Standard debugging hooks for `malloc'. - Copyright (C) 1990-1997,1999,2000-2002,2007 Free Software Foundation, Inc. + Copyright (C) 1990-1997,1999,2000-2002,2007,2010 + Free Software Foundation, Inc. This file is part of the GNU C Library. Written May 1989 by Mike Haertel. @@ -25,6 +26,7 @@ # include <stdint.h> # include <stdio.h> # include <libintl.h> +# include <errno.h> #endif /* Old hook values. */ @@ -209,6 +211,12 @@ mallochook (__malloc_size_t size, const __ptr_t caller) if (pedantic) mcheck_check_all (); + if (size > ~((size_t) 0) - (sizeof (struct hdr) + 1)) + { + __set_errno (ENOMEM); + return NULL; + } + __malloc_hook = old_malloc_hook; if (old_malloc_hook != NULL) hdr = (struct hdr *) (*old_malloc_hook) (sizeof (struct hdr) + size + 1, @@ -241,6 +249,12 @@ memalignhook (__malloc_size_t alignment, __malloc_size_t size, slop = (sizeof *hdr + alignment - 1) & -alignment; + if (size > ~((size_t) 0) - (slop + 1)) + { + __set_errno (ENOMEM); + return NULL; + } + __memalign_hook = old_memalign_hook; if (old_memalign_hook != NULL) block = (*old_memalign_hook) (alignment, slop + size + 1, caller); @@ -276,6 +290,12 @@ reallochook (__ptr_t ptr, __malloc_size_t size, const __ptr_t caller) if (pedantic) mcheck_check_all (); + if (size > ~((size_t) 0) - (sizeof (struct hdr) + 1)) + { + __set_errno (ENOMEM); + return NULL; + } + if (ptr) { hdr = ((struct hdr *) ptr) - 1; |