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Message-ID: <20111215164918.GA13003@www.outflux.net>
Date: Thu, 15 Dec 2011 08:49:18 -0800
From: Kees Cook <keescook@...omium.org>
To: linux-kernel@...r.kernel.org
Cc: Ingo Molnar <mingo@...e.hu>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Glauber Costa <glommer@...allels.com>,
Suresh Siddha <suresh.b.siddha@...el.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: [PATCH v2] sched: add missing rcu_deref around real_parent
Wrap another real_parent dereference while under rcu_read_lock.
Signed-off-by: Kees Cook <keescook@...omium.org>
---
v2: rebase to korg/tip/tip.git
---
kernel/sched/core.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3c5b21e..c7ea688 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4784,7 +4784,7 @@ void sched_show_task(struct task_struct *p)
free = stack_not_used(p);
#endif
printk(KERN_CONT "%5lu %5d %6d 0x%08lx\n", free,
- task_pid_nr(p), task_pid_nr(p->real_parent),
+ task_pid_nr(p), task_pid_nr(rcu_dereference(p->real_parent)),
(unsigned long)task_thread_info(p)->flags);
show_stack(p, NULL);
--
1.7.0.4
--
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