diff options
| author | Cyrill Gorcunov <gorcunov@openvz.org> | 2014-10-09 15:27:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 22:25:55 -0400 |
| commit | 8764b338b37524ab1a78aee527318ebee9762487 (patch) | |
| tree | 2f4a777fb6728331f0da3bb6d759cd27bf16454f /kernel/sys.c | |
| parent | 9c5990240e076ae564cccbd921868cd08f6daaa5 (diff) | |
mm: use may_adjust_brk helper
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Andrew Vagin <avagin@openvz.org>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Vasiliy Kulikov <segoon@openwall.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Julien Tinnes <jln@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index ce8129192a2..7879729bd3b 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1693,7 +1693,6 @@ exit: static int prctl_set_mm(int opt, unsigned long addr, unsigned long arg4, unsigned long arg5) { - unsigned long rlim = rlimit(RLIMIT_DATA); struct mm_struct *mm = current->mm; struct vm_area_struct *vma; int error; @@ -1733,9 +1732,8 @@ static int prctl_set_mm(int opt, unsigned long addr, if (addr <= mm->end_data) goto out; - if (rlim < RLIM_INFINITY && - (mm->brk - addr) + - (mm->end_data - mm->start_data) > rlim) + if (check_data_rlimit(rlimit(RLIMIT_DATA), mm->brk, addr, + mm->end_data, mm->start_data)) goto out; mm->start_brk = addr; @@ -1745,9 +1743,8 @@ static int prctl_set_mm(int opt, unsigned long addr, if (addr <= mm->end_data) goto out; - if (rlim < RLIM_INFINITY && - (addr - mm->start_brk) + - (mm->end_data - mm->start_data) > rlim) + if (check_data_rlimit(rlimit(RLIMIT_DATA), addr, mm->start_brk, + mm->end_data, mm->start_data)) goto out; mm->brk = addr; |