bonding: fix a race in IGMP handling

[net-next-2.6.git] / drivers / net / bonding / bond_main.c

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index bdb68a600382bdcfbe8a9e2cf70f8360821e2567..71a169740d05daf463b04f2ff591a943f8c1847e 100644 (file)
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -878,8 +878,10 @@ static void __bond_resend_igmp_join_requests(struct net_device *dev)
        rcu_read_lock();
        in_dev = __in_dev_get_rcu(dev);
        if (in_dev) {
+               read_lock(&in_dev->mc_list_lock);
                for (im = in_dev->mc_list; im; im = im->next)
                        ip_mc_rejoin_group(im);
+               read_unlock(&in_dev->mc_list_lock);
        }
 
        rcu_read_unlock();