From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753636Ab2KTRHA (ORCPT ); Tue, 20 Nov 2012 12:07:00 -0500 Received: from www.linutronix.de ([62.245.132.108]:57448 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753242Ab2KTRG7 (ORCPT ); Tue, 20 Nov 2012 12:06:59 -0500 Date: Tue, 20 Nov 2012 18:06:55 +0100 (CET) From: Thomas Gleixner To: Linus Torvalds cc: Andrew Morton , Ingo Molnar , LKML Subject: [GIT pull] core fixes for 3.7 Message-ID: User-Agent: Alpine 2.02 (LFD 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linus, please pull the latest core-urgent-for-linus git tree from: git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-urgent-for-linus * One line fix, which plugs a rcu_user leak. Thanks, tglx ------------------> Frederic Weisbecker (1): rcu: Fix unrecovered RCU user mode in syscall_trace_leave() arch/x86/kernel/ptrace.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c index b00b33a..eff5b8c 100644 --- a/arch/x86/kernel/ptrace.c +++ b/arch/x86/kernel/ptrace.c @@ -1511,6 +1511,13 @@ void syscall_trace_leave(struct pt_regs *regs) { bool step; + /* + * We may come here right after calling schedule_user() + * or do_notify_resume(), in which case we can be in RCU + * user mode. + */ + rcu_user_exit(); + audit_syscall_exit(regs); if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))