[NETNS]: Inet control socket should not hold a namespace.

This is a generic requirement, so make inet_ctl_sock_create namespace
aware and create a inet_ctl_sock_destroy wrapper around
sk_release_kernel.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index cad664b..cf766ad 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1251,7 +1251,8 @@
 }
 
 int inet_ctl_sock_create(struct sock **sk, unsigned short family,
-			 unsigned short type, unsigned char protocol)
+			 unsigned short type, unsigned char protocol,
+			 struct net *net)
 {
 	struct socket *sock;
 	int rc = sock_create_kern(family, type, protocol, &sock);
@@ -1265,6 +1266,8 @@
 		 * we do not wish this socket to see incoming packets.
 		 */
 		(*sk)->sk_prot->unhash(*sk);
+
+		sk_change_net(*sk, net);
 	}
 	return rc;
 }