net: ip, raw_diag -- Fix socket leaking for destroy request

In raw_diag_destroy the helper raw_sock_get returns
with sock_hold call, so we have to put it then.

CC: David S. Miller <davem@davemloft.net>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: David Ahern <dsa@cumulusnetworks.com>
CC: Andrey Vagin <avagin@openvz.org>
CC: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Cyrill Gorcunov

net/ipv4/raw_diag.c

@@ -205,11 +205,14 @@ static int raw_diag_destroy(struct sk_buff *in_skb,
 {
 	struct net *net = sock_net(in_skb->sk);
 	struct sock *sk;
+	int err;
 
 	sk = raw_sock_get(net, r);
 	if (IS_ERR(sk))
 		return PTR_ERR(sk);
-	return sock_diag_destroy(sk, ECONNABORTED);
+	err = sock_diag_destroy(sk, ECONNABORTED);
+	sock_put(sk);
+	return err;
 }
 #endif