Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755292AbaJCVur (ORCPT ); Fri, 3 Oct 2014 17:50:47 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:45628 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756237AbaJCVpY (ORCPT ); Fri, 3 Oct 2014 17:45:24 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Zefan Li , Tejun Heo , Cong Wang Subject: [PATCH 3.16 208/357] cgroup: fix unbalanced locking Date: Fri, 3 Oct 2014 14:29:54 -0700 Message-Id: <20141003212939.783332925@linuxfoundation.org> X-Mailer: git-send-email 2.1.2 In-Reply-To: <20141003212933.458851516@linuxfoundation.org> References: <20141003212933.458851516@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zefan Li commit eb4aec84d6bdf98d00cedb41c18000f7a31e648a upstream. cgroup_pidlist_start() holds cgrp->pidlist_mutex and then calls pidlist_array_load(), and cgroup_pidlist_stop() releases the mutex. It is wrong that we release the mutex in the failure path in pidlist_array_load(), because cgroup_pidlist_stop() will be called no matter if cgroup_pidlist_start() returns errno or not. Fixes: 4bac00d16a8760eae7205e41d2c246477d42a210 Signed-off-by: Zefan Li Signed-off-by: Tejun Heo Acked-by: Cong Wang Signed-off-by: Greg Kroah-Hartman --- kernel/cgroup.c | 1 - 1 file changed, 1 deletion(-) --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -3833,7 +3833,6 @@ static int pidlist_array_load(struct cgr l = cgroup_pidlist_find_create(cgrp, type); if (!l) { - mutex_unlock(&cgrp->pidlist_mutex); pidlist_free(array); return -ENOMEM; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/