From: Kees Cook <keescook@chromium.org>
Date: Fri, 9 Dec 2011 00:25:48 +0000 (-0800)
Subject: apparmor: add missing rcu_dereference()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2053c4727c5a891bf182397e425b6cb87b2ae613;p=linux-beck.git

apparmor: add missing rcu_dereference()

Adds a missed rcu_dereference() around real_parent.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
---

diff --git a/security/apparmor/audit.c b/security/apparmor/audit.c
index 96502b22b268..f3fafedd798a 100644
--- a/security/apparmor/audit.c
+++ b/security/apparmor/audit.c
@@ -133,7 +133,7 @@ static void audit_pre(struct audit_buffer *ab, void *ca)
 		struct aa_profile *profile = sa->aad.profile;
 		pid_t pid;
 		rcu_read_lock();
-		pid = tsk->real_parent->pid;
+		pid = rcu_dereference(tsk->real_parent)->pid;
 		rcu_read_unlock();
 		audit_log_format(ab, " parent=%d", pid);
 		if (profile->ns != root_ns) {