pptp: lookup route with the proper net namespace

[ Upstream commit 08252b32311c3fa84219ad794d640af7399b5485 ]

pptp always use init_net as the net namespace to lookup
route, this will cause route lookup failed in container.

because we already set the correct net namespace to struct
sock in pptp_create,so fix this by using sock_net(sk) to
replace &init_net.

Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ppp/pptp.c b/drivers/net/ppp/pptp.c
index 1c98321b56cc1547eb105b39758d2663e54de3ae..162464fe86bf7634fb9ac6c21ecd76e25beb10b6 100644 (file)
--- a/drivers/net/ppp/pptp.c
+++ b/drivers/net/ppp/pptp.c
@@ -189,7 +189,7 @@ static int pptp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
        if (sk_pppox(po)->sk_state & PPPOX_DEAD)
                goto tx_error;
 
-       rt = ip_route_output_ports(&init_net, &fl4, NULL,
+       rt = ip_route_output_ports(sock_net(sk), &fl4, NULL,
                                   opt->dst_addr.sin_addr.s_addr,
                                   opt->src_addr.sin_addr.s_addr,
                                   0, 0, IPPROTO_GRE,
@@ -468,7 +468,7 @@ static int pptp_connect(struct socket *sock, struct sockaddr *uservaddr,
        po->chan.private = sk;
        po->chan.ops = &pptp_chan_ops;
 
-       rt = ip_route_output_ports(&init_net, &fl4, sk,
+       rt = ip_route_output_ports(sock_net(sk), &fl4, sk,
                                   opt->dst_addr.sin_addr.s_addr,
                                   opt->src_addr.sin_addr.s_addr,
                                   0, 0,