[IPV6] ROUTE: Allow searching subtree only.

Signed-off-by: NYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Acked-by: NVille Nuorvala <vnuorval@tcs.hut.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ip6_fib.c

@@ -899,7 +899,7 @@ struct fib6_node * fib6_lookup(struct fib6_node *root, struct in6_addr *daddr,
 		}
 	};
 
-	fn = fib6_lookup_1(root, args);
+	fn = fib6_lookup_1(root, daddr ? args : args + 1);
 
 	if (fn == NULL || fn->fn_flags & RTN_TL_ROOT)
 		fn = root;