netdev - [PATCH net] l2tp: Correctly return -EBADF from pppol2tp

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Message-Id: <20160726191435.31503-1-phil.turnbull@oracle.com>
Date:	Tue, 26 Jul 2016 15:14:35 -0400
From:	Phil Turnbull <phil.turnbull@...cle.com>
To:	netdev@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>,
	James Chapman <jchapman@...alix.com>,
	Phil Turnbull <phil.turnbull@...cle.com>
Subject: [PATCH net] l2tp: Correctly return -EBADF from pppol2tp_getname.

If 'tunnel' is NULL we should return -EBADF but the 'end_put_sess' path
unconditionally sets 'error' back to zero. Rework the error path so it
more closely matches pppol2tp_sendmsg.

Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts")
Signed-off-by: Phil Turnbull <phil.turnbull@...cle.com>
---
 net/l2tp/l2tp_ppp.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 652c250b9a3b..d9560aa2dba3 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -866,10 +866,8 @@ static int pppol2tp_getname(struct socket *sock, struct sockaddr *uaddr,
 
 	pls = l2tp_session_priv(session);
 	tunnel = l2tp_sock_to_tunnel(pls->tunnel_sock);
-	if (tunnel == NULL) {
-		error = -EBADF;
+	if (tunnel == NULL)
 		goto end_put_sess;
-	}
 
 	inet = inet_sk(tunnel->sock);
 	if ((tunnel->version == 2) && (tunnel->sock->sk_family == AF_INET)) {
@@ -947,12 +945,11 @@ static int pppol2tp_getname(struct socket *sock, struct sockaddr *uaddr,
 	}
 
 	*usockaddr_len = len;
+	error = 0;
 
 	sock_put(pls->tunnel_sock);
 end_put_sess:
 	sock_put(sk);
-	error = 0;
-
 end:
 	return error;
 }
-- 
2.9.0.rc2