From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759157Ab1LOQxk (ORCPT ); Thu, 15 Dec 2011 11:53:40 -0500 Received: from smtp.outflux.net ([198.145.64.163]:34979 "EHLO smtp.outflux.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756294Ab1LOQxi (ORCPT ); Thu, 15 Dec 2011 11:53:38 -0500 Date: Thu, 15 Dec 2011 08:49:18 -0800 From: Kees Cook To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Peter Zijlstra , Glauber Costa , Suresh Siddha , KAMEZAWA Hiroyuki Subject: [PATCH v2] sched: add missing rcu_deref around real_parent Message-ID: <20111215164918.GA13003@www.outflux.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) X-HELO: www.outflux.net Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Wrap another real_parent dereference while under rcu_read_lock. Signed-off-by: Kees Cook --- 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