netdev - [PATCH] Fix pppol2tp getsockname()

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Date:	Tue, 20 Mar 2012 09:57:54 -0400
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	"David S. Miller" <davem@...emloft.net>,
	James Chapman <jchapman@...alix.com>
Cc:	netdev@...r.kernel.org
Subject: [PATCH] Fix pppol2tp getsockname()

While testing L2TP functionality, I came across a bug in getsockname().  The
IP address returned within the pppol2tp_addr's addr memember was not being
set to the IP  address in use.  This bug is caused by using inet_sk() on the
wrong socket (the L2TP socket rather than the underlying UDP socket), and was
likely introduced during the addition of L2TPv3 support.

Signed-off-by: Benjamin LaHaise <bcrl@...ck.org>
---
 net/l2tp/l2tp_ppp.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/l2tp/l2tp_ppp.c b/net/l2tp/l2tp_ppp.c
index 96bc7a6..9b07191 100644
--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -915,7 +915,7 @@ static int pppol2tp_getname(struct socket *sock, struct sockaddr *uaddr,
 		goto end_put_sess;
 	}
 
-	inet = inet_sk(sk);
+	inet = inet_sk(tunnel->sock);
 	if (tunnel->version == 2) {
 		struct sockaddr_pppol2tp sp;
 		len = sizeof(sp);
-- 
1.7.4.1

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