net: do not call sock_put() on TIMEWAIT sockets

[ Upstream commit 80ad1d61 ]

commit 3ab5aee7 ("net: Convert TCP & DCCP hash tables to use RCU /
hlist_nulls") incorrectly used sock_put() on TIMEWAIT sockets.

We should instead use inet_twsk_put()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

net/ipv4/inet_hashtables.c

@@ -268,7 +268,7 @@ struct sock * __inet_lookup_established(struct net *net,
 			}
 			if (unlikely(!INET_TW_MATCH(sk, net, hash, acookie,
 				 saddr, daddr, ports, dif))) {
-				sock_put(sk);
+				inet_twsk_put(inet_twsk(sk));
 				goto begintw;
 			}
 			goto out;

net/ipv6/inet6_hashtables.c

@@ -110,7 +110,7 @@ struct sock *__inet6_lookup_established(struct net *net,
 				goto out;
 			}
 			if (!INET6_TW_MATCH(sk, net, hash, saddr, daddr, ports, dif)) {
-				sock_put(sk);
+				inet_twsk_put(inet_twsk(sk));
 				goto begintw;
 			}
 			goto out;