netdev - [PATCHv2 5/5] bonding: in bond_mc_swap() bond's mc addr list is walked without lock

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Message-Id: <1366306418-3661-6-git-send-email-nikolay@redhat.com>
Date:	Thu, 18 Apr 2013 19:33:38 +0200
From:	Nikolay Aleksandrov <nikolay@...hat.com>
To:	netdev@...r.kernel.org
Cc:	andy@...yhouse.net, fubar@...ibm.com, davem@...emloft.net
Subject: [PATCHv2 5/5] bonding: in bond_mc_swap() bond's mc addr list is walked without lock

Use netif_addr_lock_bh() to acquire the appropriate lock before walking.

Signed-off-by: Nikolay Aleksandrov <nikolay@...hat.com>
---
 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 1f3b1cc..5a2b5f1 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

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