[PATCH 4.15 016/168] l2tp: fix missing print session offset info

[Greg Kroah-Hartman]

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

------------------

From: Hangbin Liu <liuhangbin@xxxxxxxxx>


[ Upstream commit 820da5357572715c6235ba3b3daa2d5b43a1198f ]

Report offset parameter in L2TP_CMD_SESSION_GET command if
it has been configured by userspace

Fixes: 309795f4bec ("l2tp: Add netlink control API for L2TP")
Reported-by: Jianlin Shi <jishi@xxxxxxxxxx>
Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/l2tp/l2tp_netlink.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -761,6 +761,8 @@ static int l2tp_nl_session_send(struct s
 
 	if ((session->ifname[0] &&
 	     nla_put_string(skb, L2TP_ATTR_IFNAME, session->ifname)) ||
+	    (session->offset &&
+	     nla_put_u16(skb, L2TP_ATTR_OFFSET, session->offset)) ||
 	    (session->cookie_len &&
 	     nla_put(skb, L2TP_ATTR_COOKIE, session->cookie_len,
 		     &session->cookie[0])) ||