5 files changed, 31 insertions, 43 deletions

diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
index cec582563e0..f8a3455f449 100644
--- a/net/core/dev_mcast.c
+++ b/net/core/dev_mcast.c
@@ -156,39 +156,14 @@ void dev_mc_unsync(struct net_device *to, struct net_device *from)
 EXPORT_SYMBOL(dev_mc_unsync);
 
 #ifdef CONFIG_PROC_FS
-static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos)
-	__acquires(dev_base_lock)
-{
-	struct net *net = seq_file_net(seq);
-	struct net_device *dev;
-	loff_t off = 0;
-
-	read_lock(&dev_base_lock);
-	for_each_netdev(net, dev) {
-		if (off++ == *pos)
-			return dev;
-	}
-	return NULL;
-}
-
-static void *dev_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
-	++*pos;
-	return next_net_device((struct net_device *)v);
-}
-
-static void dev_mc_seq_stop(struct seq_file *seq, void *v)
-	__releases(dev_base_lock)
-{
-	read_unlock(&dev_base_lock);
-}
-
-
 static int dev_mc_seq_show(struct seq_file *seq, void *v)
 {
 	struct dev_addr_list *m;
 	struct net_device *dev = v;
 
+	if (v == SEQ_START_TOKEN)
+		return 0;
+
 	netif_tx_lock_bh(dev);
 	for (m = dev->mc_list; m; m = m->next) {
 		int i;
@@ -206,9 +181,9 @@ static int dev_mc_seq_show(struct seq_file *seq, void *v)
 }
 
 static const struct seq_operations dev_mc_seq_ops = {
-	.start = dev_mc_seq_start,
-	.next  = dev_mc_seq_next,
-	.stop  = dev_mc_seq_stop,
+	.start = dev_seq_start,
+	.next  = dev_seq_next,
+	.stop  = dev_seq_stop,
 	.show  = dev_mc_seq_show,
 };
 
diff --git a/net/core/dst.c b/net/core/dst.c
index 7deef483c79..3a01a819ba4 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -295,9 +295,6 @@ static int dst_dev_event(struct notifier_block *this, unsigned long event, void
 	struct net_device *dev = ptr;
 	struct dst_entry *dst, *last = NULL;
 
-	if (dev->nd_net != &init_net)
-		return NOTIFY_DONE;
-
 	switch (event) {
 	case NETDEV_UNREGISTER:
 	case NETDEV_DOWN:
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index d9a02b2cc28..23c0a10c0c3 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1284,9 +1284,7 @@ static inline struct neigh_parms *lookup_neigh_params(struct neigh_table *tbl,
 	struct neigh_parms *p;
 
 	for (p = &tbl->parms; p; p = p->next) {
-		if (p->net != net)
-			continue;
-		if ((p->dev && p->dev->ifindex == ifindex) ||
+		if ((p->dev && p->dev->ifindex == ifindex && p->net == net) ||
 		    (!p->dev && !ifindex))
 			return p;
 	}
@@ -2741,7 +2739,8 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
 	neigh_path[NEIGH_CTL_PATH_PROTO].procname = p_name;
 	neigh_path[NEIGH_CTL_PATH_PROTO].ctl_name = p_id;
 
-	t->sysctl_header = register_sysctl_paths(neigh_path, t->neigh_vars);
+	t->sysctl_header =
+		register_net_sysctl_table(p->net, neigh_path, t->neigh_vars);
 	if (!t->sysctl_header)
 		goto free_procname;
 
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index c635de52526..b04d643fc3c 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -390,9 +390,7 @@ static void arp_reply(struct sk_buff *skb)
 	if (skb->dev->flags & IFF_NOARP)
 		return;
 
-	if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
-				 (2 * skb->dev->addr_len) +
-				 (2 * sizeof(u32)))))
+	if (!pskb_may_pull(skb, arp_hdr_len(skb->dev)))
 		return;
 
 	skb_reset_network_header(skb);
@@ -420,7 +418,7 @@ static void arp_reply(struct sk_buff *skb)
 	    ipv4_is_loopback(tip) || ipv4_is_multicast(tip))
 		return;
 
-	size = sizeof(struct arphdr) + 2 * (skb->dev->addr_len + 4);
+	size = arp_hdr_len(skb->dev);
 	send_skb = find_skb(np, size + LL_RESERVED_SPACE(np->dev),
 			    LL_RESERVED_SPACE(np->dev));
 
diff --git a/net/core/sock.c b/net/core/sock.c
index 09cb3a74de7..bb5236aee64 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -981,12 +981,31 @@ void sk_free(struct sock *sk)
 
 	if (atomic_read(&sk->sk_omem_alloc))
 		printk(KERN_DEBUG "%s: optmem leakage (%d bytes) detected.\n",
-		       __FUNCTION__, atomic_read(&sk->sk_omem_alloc));
+		       __func__, atomic_read(&sk->sk_omem_alloc));
 
 	put_net(sk->sk_net);
 	sk_prot_free(sk->sk_prot_creator, sk);
 }
 
+/*
+ * Last sock_put should drop referrence to sk->sk_net. It has already
+ * been dropped in sk_change_net. Taking referrence to stopping namespace
+ * is not an option.
+ * Take referrence to a socket to remove it from hash _alive_ and after that
+ * destroy it in the context of init_net.
+ */
+void sk_release_kernel(struct sock *sk)
+{
+	if (sk == NULL || sk->sk_socket == NULL)
+		return;
+
+	sock_hold(sk);
+	sock_release(sk->sk_socket);
+	sk->sk_net = get_net(&init_net);
+	sock_put(sk);
+}
+EXPORT_SYMBOL(sk_release_kernel);
+
 struct sock *sk_clone(const struct sock *sk, const gfp_t priority)
 {
 	struct sock *newsk;