This is a note to let you know that I've just added the patch titled
l2tp: consider '::' as wildcard address in l2tp_ip6 socket lookup
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
l2tp-consider-as-wildcard-address-in-l2tp_ip6-socket-lookup.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Aug 4 15:15:01 PDT 2017
From: Guillaume Nault <g.nault@xxxxxxxxxxxx>
Date: Fri, 30 Dec 2016 19:48:19 +0100
Subject: l2tp: consider '::' as wildcard address in l2tp_ip6 socket lookup
From: Guillaume Nault <g.nault@xxxxxxxxxxxx>
[ Upstream commit 97b84fd6d91766ea57dcc350d78f42639e011c30 ]
An L2TP socket bound to the unspecified address should match with any
address. If not, it can't receive any packet and __l2tp_ip6_bind_lookup()
can't prevent another socket from binding on the same device/tunnel ID.
While there, rename the 'addr' variable to 'sk_laddr' (local addr), to
make following patch clearer.
Signed-off-by: Guillaume Nault <g.nault@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/l2tp/l2tp_ip6.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/l2tp/l2tp_ip6.c
+++ b/net/l2tp/l2tp_ip6.c
@@ -64,7 +64,7 @@ static struct sock *__l2tp_ip6_bind_look
struct sock *sk;
sk_for_each_bound(sk, &l2tp_ip6_bind_table) {
- const struct in6_addr *addr = inet6_rcv_saddr(sk);
+ const struct in6_addr *sk_laddr = inet6_rcv_saddr(sk);
struct l2tp_ip6_sock *l2tp = l2tp_ip6_sk(sk);
if (l2tp == NULL)
@@ -72,7 +72,7 @@ static struct sock *__l2tp_ip6_bind_look
if ((l2tp->conn_id == tunnel_id) &&
net_eq(sock_net(sk), net) &&
- (!addr || ipv6_addr_equal(addr, laddr)) &&
+ (!sk_laddr || ipv6_addr_any(sk_laddr) || ipv6_addr_equal(sk_laddr, laddr)) &&
(!sk->sk_bound_dev_if || !dif ||
sk->sk_bound_dev_if == dif))
goto found;
Patches currently in stable-queue which might be from g.nault@xxxxxxxxxxxx are
queue-4.9/l2tp-consider-as-wildcard-address-in-l2tp_ip6-socket-lookup.patch