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net: l2tp: Make l2tp_ip6 namespace aware 

l2tp_ip6 tunnel and session lookups were still using init_net, although
the l2tp core infrastructure already supports lookups keyed by 'net'.

As a result, l2tp_ip6_recv discarded packets for tunnels/sessions
created in namespaces other than the init_net.

Fix, by using dev_net(skb->dev) or sock_net(sk) where appropriate.

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shmulik Ladkani 2016-05-26 20:16:36 +03:00 committed by David S. Miller
parent 176b346b37
commit 0e6b525982
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
net/l2tp/l2tp_ip6.c
View File

@ -128,6 +128,7 @@ static inline struct sock *l2tp_ip6_bind_lookup(struct net *net,
*/
static int l2tp_ip6_recv(struct sk_buff *skb)
{
struct net *net = dev_net(skb->dev);
struct sock *sk;
u32 session_id;
u32 tunnel_id;
@ -154,7 +155,7 @@ static int l2tp_ip6_recv(struct sk_buff *skb)
}
/* Ok, this is a data packet. Lookup the session. */
session = l2tp_session_find(&init_net, NULL, session_id);
session = l2tp_session_find(net, NULL, session_id);
if (session == NULL)
goto discard;
@ -188,14 +189,14 @@ pass_up:
goto discard;
tunnel_id = ntohl(*(__be32 *) &skb->data[4]);
tunnel = l2tp_tunnel_find(&init_net, tunnel_id);
tunnel = l2tp_tunnel_find(net, tunnel_id);
if (tunnel != NULL)
sk = tunnel->sock;
else {
struct ipv6hdr *iph = ipv6_hdr(skb);
read_lock_bh(&l2tp_ip6_lock);
sk = __l2tp_ip6_bind_lookup(&init_net, &iph->daddr,
sk = __l2tp_ip6_bind_lookup(net, &iph->daddr,
0, tunnel_id);
read_unlock_bh(&l2tp_ip6_lock);
}
@ -263,6 +264,7 @@ static int l2tp_ip6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct sockaddr_l2tpip6 *addr = (struct sockaddr_l2tpip6 *) uaddr;
struct net *net = sock_net(sk);
__be32 v4addr = 0;
int addr_type;
int err;
@ -286,7 +288,7 @@ static int l2tp_ip6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
err = -EADDRINUSE;
read_lock_bh(&l2tp_ip6_lock);
if (__l2tp_ip6_bind_lookup(&init_net, &addr->l2tp_addr,
if (__l2tp_ip6_bind_lookup(net, &addr->l2tp_addr,
sk->sk_bound_dev_if, addr->l2tp_conn_id))
goto out_in_use;
read_unlock_bh(&l2tp_ip6_lock);
@ -456,7 +458,7 @@ static int l2tp_ip6_backlog_recv(struct sock *sk, struct sk_buff *skb)
return 0;
drop:
IP_INC_STATS(&init_net, IPSTATS_MIB_INDISCARDS);
IP_INC_STATS(sock_net(sk), IPSTATS_MIB_INDISCARDS);
kfree_skb(skb);
return -1;
}