path: root/security/commoncap.c
diff options
authorAlan Cox <alan@lxorguk.ukuu.org.uk>2007-08-22 14:01:28 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-22 19:52:45 -0700
commit34b4e4aa3c470ce8fa2bd78abb1741b4b58baad7 (patch)
tree91d620288f1aaf63c12dc84ca1015465818601f2 /security/commoncap.c
parentafe1ab4d577892822de2c8e803fbfaed6ec44ba3 (diff)
fix NULL pointer dereference in __vm_enough_memory()
The new exec code inserts an accounted vma into an mm struct which is not current->mm. The existing memory check code has a hard coded assumption that this does not happen as does the security code. As the correct mm is known we pass the mm to the security method and the helper function. A new security test is added for the case where we need to pass the mm and the existing one is modified to pass current->mm to avoid the need to change large amounts of code. (Thanks to Tobias for fixing rejects and testing) Signed-off-by: Alan Cox <alan@redhat.com> Cc: WU Fengguang <wfg@mail.ustc.edu.cn> Cc: James Morris <jmorris@redhat.com> Cc: Tobias Diedrich <ranma+kernel@tdiedrich.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security/commoncap.c')
1 files changed, 2 insertions, 2 deletions
diff --git a/security/commoncap.c b/security/commoncap.c
index 338606eb723..7520361663e 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -315,13 +315,13 @@ int cap_syslog (int type)
return 0;
-int cap_vm_enough_memory(long pages)
+int cap_vm_enough_memory(struct mm_struct *mm, long pages)
int cap_sys_admin = 0;
if (cap_capable(current, CAP_SYS_ADMIN) == 0)
cap_sys_admin = 1;
- return __vm_enough_memory(pages, cap_sys_admin);
+ return __vm_enough_memory(mm, pages, cap_sys_admin);