From: Kees Cook <keescook@chromium.org>
Date: Fri, 9 Dec 2011 00:30:42 +0000 (-0800)
Subject: tomoyo: add missing rcu_dereference()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bb80d880ad2b11cd4ea5f28f815016b1548224a4;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

tomoyo: add missing rcu_dereference()

Adds a missed rcu_dereference() around real_parent.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
---

diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index ed311d7a8ce0..cb9f5c2d6f3a 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -1122,7 +1122,7 @@ static inline pid_t tomoyo_sys_getppid(void)
 {
 	pid_t pid;
 	rcu_read_lock();
-	pid = task_tgid_vnr(current->real_parent);
+	pid = task_tgid_vnr(rcu_dereference(current->real_parent));
 	rcu_read_unlock();
 	return pid;
 }