Commit 30c4cf57 authored by David L Stevens's avatar David L Stevens Committed by David S. Miller

[IPV4/IPV6]: Fix inet{,6} device initialization order.

It is important that we only assign dev->ip{,6}_ptr
only after all portions of the inet{,6} are setup.

Otherwise we can receive packets before the multicast
spinlocks et al. are initialized.
Signed-off-by: default avatarDavid L Stevens <dlstevens@us.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0d630cc0
......@@ -165,9 +165,8 @@ struct in_device *inetdev_init(struct net_device *dev)
NET_IPV4_NEIGH, "ipv4", NULL, NULL);
#endif
/* Account for reference dev->ip_ptr */
/* Account for reference dev->ip_ptr (below) */
in_dev_hold(in_dev);
rcu_assign_pointer(dev->ip_ptr, in_dev);
#ifdef CONFIG_SYSCTL
devinet_sysctl_register(in_dev, &in_dev->cnf);
......@@ -176,6 +175,8 @@ struct in_device *inetdev_init(struct net_device *dev)
if (dev->flags & IFF_UP)
ip_mc_up(in_dev);
out:
/* we can receive as soon as ip_ptr is set -- do this last */
rcu_assign_pointer(dev->ip_ptr, in_dev);
return in_dev;
out_kfree:
kfree(in_dev);
......
......@@ -413,8 +413,6 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
if (netif_carrier_ok(dev))
ndev->if_flags |= IF_READY;
/* protected by rtnl_lock */
rcu_assign_pointer(dev->ip6_ptr, ndev);
ipv6_mc_init_dev(ndev);
ndev->tstamp = jiffies;
......@@ -425,6 +423,8 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
NULL);
addrconf_sysctl_register(ndev, &ndev->cnf);
#endif
/* protected by rtnl_lock */
rcu_assign_pointer(dev->ip6_ptr, ndev);
return ndev;
}
......
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