From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756373AbaCDUDk (ORCPT ); Tue, 4 Mar 2014 15:03:40 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:40999 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756238AbaCDUDb (ORCPT ); Tue, 4 Mar 2014 15:03:31 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Antonio Quartulli , Marek Lindner Subject: [PATCH 3.13 071/172] batman-adv: avoid double free when orig_node initialization fails Date: Tue, 4 Mar 2014 12:02:35 -0800 Message-Id: <20140304200302.010111461@linuxfoundation.org> X-Mailer: git-send-email 1.9.0 In-Reply-To: <20140304200259.626667112@linuxfoundation.org> References: <20140304200259.626667112@linuxfoundation.org> User-Agent: quilt/0.61-1 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 3.13-stable review patch. If anyone has any objections, please let me know. ------------------ From: Antonio Quartulli [ Upstream commit a5a5cb8cab526af2f6cbe9715f8ca843192f0d81 ] In the failure path of the orig_node initialization routine the orig_node->bat_iv.bcast_own field is free'd twice: first in batadv_iv_ogm_orig_get() and then later in batadv_orig_node_free_rcu(). Fix it by removing the kfree in batadv_iv_ogm_orig_get(). Signed-off-by: Antonio Quartulli Signed-off-by: Marek Lindner Signed-off-by: Greg Kroah-Hartman --- net/batman-adv/bat_iv_ogm.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -243,18 +243,16 @@ batadv_iv_ogm_orig_get(struct batadv_pri size = bat_priv->num_ifaces * sizeof(uint8_t); orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); if (!orig_node->bat_iv.bcast_own_sum) - goto free_bcast_own; + goto free_orig_node; hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, batadv_choose_orig, orig_node, &orig_node->hash_entry); if (hash_added != 0) - goto free_bcast_own; + goto free_orig_node; return orig_node; -free_bcast_own: - kfree(orig_node->bat_iv.bcast_own); free_orig_node: /* free twice, as batadv_orig_node_new sets refcount to 2 */ batadv_orig_node_free_ref(orig_node);