[3.13.y.z extended stable] Patch "ipip, sit: fix ipv4_{update_pmtu, redirect} calls" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    ipip, sit: fix ipv4_{update_pmtu,redirect} calls

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11.6.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 4b7abc6c6b4cfc2cf4b98f49a49da6ffdd2cb848 Mon Sep 17 00:00:00 2001
From: Dmitry Popov <ixaphire at qrator.net>
Date: Fri, 6 Jun 2014 23:19:21 +0400
Subject: ipip, sit: fix ipv4_{update_pmtu,redirect} calls

[ Upstream commit 2346829e641b804ece9ac9298136b56d9567c278 ]

ipv4_{update_pmtu,redirect} were called with tunnel's ifindex (t->dev is a
tunnel netdevice). It caused wrong route lookup and failure of pmtu update or
redirect. We should use the same ifindex that we use in ip_route_output_* in
*tunnel_xmit code. It is t->parms.link .

Signed-off-by: Dmitry Popov <ixaphire at qrator.net>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 net/ipv4/ipip.c | 4 ++--
 net/ipv6/sit.c  | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index af34bdb..1e625b0 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -149,13 +149,13 @@ static int ipip_err(struct sk_buff *skb, u32 info)

 	if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) {
 		ipv4_update_pmtu(skb, dev_net(skb->dev), info,
-				 t->dev->ifindex, 0, IPPROTO_IPIP, 0);
+				 t->parms.link, 0, IPPROTO_IPIP, 0);
 		err = 0;
 		goto out;
 	}

 	if (type == ICMP_REDIRECT) {
-		ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0,
+		ipv4_redirect(skb, dev_net(skb->dev), t->parms.link, 0,
 			      IPPROTO_IPIP, 0);
 		err = 0;
 		goto out;
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index cd4777e..8f59675 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -559,12 +559,12 @@ static int ipip6_err(struct sk_buff *skb, u32 info)

 	if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) {
 		ipv4_update_pmtu(skb, dev_net(skb->dev), info,
-				 t->dev->ifindex, 0, IPPROTO_IPV6, 0);
+				 t->parms.link, 0, IPPROTO_IPV6, 0);
 		err = 0;
 		goto out;
 	}
 	if (type == ICMP_REDIRECT) {
-		ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0,
+		ipv4_redirect(skb, dev_net(skb->dev), t->parms.link, 0,
 			      IPPROTO_IPV6, 0);
 		err = 0;
 		goto out;
--
1.9.1