[NETNS]: Add netns refcnt debug to fib rules.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index 34349f9..a5c6ccc 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -87,6 +87,7 @@
 static inline void fib_rule_put_rcu(struct rcu_head *head)
 {
 	struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
+	release_net(rule->fr_net);
 	kfree(rule);
 }