diff options
| author | Junjiro R. Okajima <hooanon05@yahoo.co.jp> | 2008-12-02 21:31:46 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-12-03 02:50:40 +0300 |
| commit | 1b79cd04fab80be61dcd2732e2423aafde9a4c1c (patch) | |
| tree | b9ff5f0de1c0ef011ac62096218d2fd4bc70c56b | |
| parent | 061e41fdb5047b1fb161e89664057835935ca1d2 (diff) | |
| download | linux-1b79cd04fab80be61dcd2732e2423aafde9a4c1c.tar.xz | |
nfsd: fix vm overcommit crash fix #2
The previous patch from Alan Cox ("nfsd: fix vm overcommit crash",
commit 731572d39fcd3498702eda4600db4c43d51e0b26) fixed the problem where
knfsd crashes on exported shmemfs objects and strict overcommit is set.
But the patch forgot supporting the case when CONFIG_SECURITY is
disabled.
This patch copies a part of his fix which is mainly for detecting a bug
earlier.
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Junjiro R. Okajima <hooanon05@yahoo.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/security.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/include/linux/security.h b/include/linux/security.h index c13f1cec9abb..e3d4ecda2673 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -1818,17 +1818,21 @@ static inline int security_settime(struct timespec *ts, struct timezone *tz) static inline int security_vm_enough_memory(long pages) { + WARN_ON(current->mm == NULL); return cap_vm_enough_memory(current->mm, pages); } -static inline int security_vm_enough_memory_kern(long pages) +static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) { - return cap_vm_enough_memory(current->mm, pages); + WARN_ON(mm == NULL); + return cap_vm_enough_memory(mm, pages); } -static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) +static inline int security_vm_enough_memory_kern(long pages) { - return cap_vm_enough_memory(mm, pages); + /* If current->mm is a kernel thread then we will pass NULL, + for this specific case that is fine */ + return cap_vm_enough_memory(current->mm, pages); } static inline int security_bprm_alloc(struct linux_binprm *bprm) |