From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikolay Aleksandrov Subject: [PATCH 5/5] bonding: in bond_mc_swap() bond's mc addr list is walked without lock Date: Thu, 18 Apr 2013 16:34:57 +0200 Message-ID: <1366295697-31037-6-git-send-email-nikolay@redhat.com> References: <1366295697-31037-1-git-send-email-nikolay@redhat.com> Cc: andy@greyhouse.net, fubar@us.ibm.com, davem@davemloft.net To: netdev@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:8707 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965340Ab3DROir (ORCPT ); Thu, 18 Apr 2013 10:38:47 -0400 In-Reply-To: <1366295697-31037-1-git-send-email-nikolay@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: Use netif_addr_lock_bh() to acquire the appropriate lock before walking. Signed-off-by: Nikolay Aleksandrov --- drivers/net/bonding/bond_main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 62bfde7..d7239c9 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -846,8 +846,10 @@ static void bond_mc_swap(struct bonding *bond, struct slave *new_active, if (bond->dev->flags & IFF_ALLMULTI) dev_set_allmulti(old_active->dev, -1); + netif_addr_lock_bh(bond->dev); netdev_for_each_mc_addr(ha, bond->dev) dev_mc_del(old_active->dev, ha->addr); + netif_addr_unlock_bh(bond->dev); } if (new_active) { @@ -858,8 +860,10 @@ static void bond_mc_swap(struct bonding *bond, struct slave *new_active, if (bond->dev->flags & IFF_ALLMULTI) dev_set_allmulti(new_active->dev, 1); + netif_addr_lock_bh(bond->dev); netdev_for_each_mc_addr(ha, bond->dev) dev_mc_add(new_active->dev, ha->addr); + netif_addr_unlock_bh(bond->dev); } } -- 1.8.1.4