diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2009-01-30 17:47:23 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-01-30 17:47:23 +0000 |
| commit | 1fdd89a78dfa4f0ea4b14c994a055de802e61a89 (patch) | |
| tree | fb50205adf4fe547c4056a9d4731ef6a1170135f /misc/sbrk.c | |
| parent | 8585cb7454e10346bccc9fb4df3fae51b2efb9b6 (diff) | |
| download | glibc-1fdd89a78dfa4f0ea4b14c994a055de802e61a89.tar.gz | |
* malloc/malloc.c (sYSMALLOc): Don't use assert when detecting
manipulated brk, use malloc_printerr.
* misc/sbrk.c (__sbrk): Better error handling for nonsense
requests.
Diffstat (limited to 'misc/sbrk.c')
| -rw-r--r-- | misc/sbrk.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/misc/sbrk.c b/misc/sbrk.c index 0df60076cc..985b34749a 100644 --- a/misc/sbrk.c +++ b/misc/sbrk.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991,1995,1996,1997,2000,2002 Free Software Foundation, Inc. +/* Copyright (C) 1991,1995-1997,2000,2002,2009 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -16,8 +16,9 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -#include <unistd.h> #include <errno.h> +#include <stdint.h> +#include <unistd.h> /* Defined in brk.c. */ extern void *__curbrk; @@ -47,7 +48,10 @@ __sbrk (intptr_t increment) return __curbrk; oldbrk = __curbrk; - if (__brk (oldbrk + increment) < 0) + if ((increment > 0 + ? ((uintptr_t) oldbrk + (uintptr_t) increment < (uintptr_t) oldbrk) + : ((uintptr_t) oldbrk < (uintptr_t) -increment)) + || __brk (oldbrk + increment) < 0) return (void *) -1; return oldbrk; |