From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Thomas Voegtle , Cong Wang , Patrick McHardy , "David S. Miller" , Eric Dumazet Subject: [ 02/23] Revert "8021q: fix a potential use-after-free" Date: Tue, 23 Apr 2013 14:56:09 -0700 Message-Id: <20130423215456.549116188@linuxfoundation.org> In-Reply-To: <20130423215456.307216898@linuxfoundation.org> References: <20130423215456.307216898@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ This reverts commit 9829fe9806e22d7a822f4c947cc432c8d1774b54 which is upstream commit 4a7df340ed1bac190c124c1601bfc10cde9fb4fb It turns out this causes problems on the 3.0-stable release. Reported-by: Thomas Voegtle Acked-by: Cong Wang Cc: Patrick McHardy Cc: "David S. Miller" Cc: Eric Dumazet Signed-off-by: Greg Kroah-Hartman --- net/8021q/vlan.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -108,6 +108,13 @@ void unregister_vlan_dev(struct net_devi grp = rtnl_dereference(real_dev->vlgrp); BUG_ON(!grp); + /* Take it out of our own structures, but be sure to interlock with + * HW accelerating devices or SW vlan input packet processing if + * VLAN is not 0 (leave it there for 802.1p). + */ + if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) + ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); + grp->nr_vlans--; if (vlan->flags & VLAN_FLAG_GVRP) @@ -132,13 +139,6 @@ void unregister_vlan_dev(struct net_devi call_rcu(&grp->rcu, vlan_rcu_free); } - /* Take it out of our own structures, but be sure to interlock with - * HW accelerating devices or SW vlan input packet processing if - * VLAN is not 0 (leave it there for 802.1p). - */ - if (vlan_id && (real_dev->features & NETIF_F_HW_VLAN_FILTER)) - ops->ndo_vlan_rx_kill_vid(real_dev, vlan_id); - /* Get rid of the vlan's reference to real_dev */ dev_put(real_dev); }