[ 096/108] Fix pppol2tp getsockname()

From: Greg KH
Date: Fri Mar 30 2012 - 18:40:52 EST

3.0-stable review patch. If anyone has any objections, please let me know.


From: Benjamin LaHaise <bcrl@xxxxxxxxx>

[ Upstream commit bbdb32cb5b73597386913d052165423b9d736145 ]

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@xxxxxxxxx>
Signed-off-by: James Chapman <jchapman@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
net/l2tp/l2tp_ppp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/l2tp/l2tp_ppp.c
+++ b/net/l2tp/l2tp_ppp.c
@@ -908,7 +908,7 @@ static int pppol2tp_getname(struct socke
goto end_put_sess;

- inet = inet_sk(sk);
+ inet = inet_sk(tunnel->sock);
if (tunnel->version == 2) {
struct sockaddr_pppol2tp sp;
len = sizeof(sp);

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