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authorDavid L Stevens <dlstevens@us.ibm.com>2007-01-04 12:31:14 -0800
committerDavid S. Miller <davem@davemloft.net>2007-01-04 12:31:14 -0800
commit30c4cf577fb5b68c16e5750d6bdbd7072e42b279 (patch)
tree36f558c08ebdd1830536aab92b8abac79330cdbc /net
parent0d630cc0a6cb8ad544b5913a26ff1349ed7c8587 (diff)
downloadop-kernel-dev-30c4cf577fb5b68c16e5750d6bdbd7072e42b279.zip
op-kernel-dev-30c4cf577fb5b68c16e5750d6bdbd7072e42b279.tar.gz
[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: David L Stevens <dlstevens@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/devinet.c5
-rw-r--r--net/ipv6/addrconf.c4
2 files changed, 5 insertions, 4 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 84bed40..25c8a429 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -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);
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 9b0a906..171e5b5 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -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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