bonding: in bond_mc_swap() bond's mc addr list is walked without lock
nikolay@redhat.com [Thu, 18 Apr 2013 07:33:38 +0000 (07:33 +0000)]
Use netif_addr_lock_bh() to acquire the appropriate lock before walking.

Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

index ae35b28..dbbea0e 100644 (file)
@@ -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);
        }
 }