Patch "ipv4: Fix traffic triggered IPsec connections." has been added to the 4.13-stable tree

Patch "ipv4: Fix traffic triggered IPsec connections." has been added to the 4.13-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ipv4: Fix traffic triggered IPsec connections.

to the 4.13-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:
     ipv4-fix-traffic-triggered-ipsec-connections.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Nov 15 17:25:34 CET 2017
From: Steffen Klassert <steffen.klassert@secunet.com>
Date: Mon, 9 Oct 2017 08:43:55 +0200
Subject: ipv4: Fix traffic triggered IPsec connections.

From: Steffen Klassert <steffen.klassert@secunet.com>


[ Upstream commit 6c0e7284d89995877740d8a26c3e99a937312a3c ]

A recent patch removed the dst_free() on the allocated
dst_entry in ipv4_blackhole_route(). The dst_free() marked the
dst_entry as dead and added it to the gc list. I.e. it was setup
for a one time usage. As a result we may now have a blackhole
route cached at a socket on some IPsec scenarios. This makes the
connection unusable.

Fix this by marking the dst_entry directly at allocation time
as 'dead', so it is used only once.

Fixes: b838d5e1c5b6 ("ipv4: mark DST_NOGC and remove the operation of dst_free()")
Reported-by: Tobias Brunner <tobias@strongswan.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/ipv4/route.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2507,7 +2507,7 @@ struct dst_entry *ipv4_blackhole_route(s
 	struct rtable *ort = (struct rtable *) dst_orig;
 	struct rtable *rt;
 
-	rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, 1, DST_OBSOLETE_NONE, 0);
+	rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, 1, DST_OBSOLETE_DEAD, 0);
 	if (rt) {
 		struct dst_entry *new = &rt->dst;
 


Patches currently in stable-queue which might be from steffen.klassert@secunet.com are

queue-4.13/ipv6-fix-traffic-triggered-ipsec-connections.patch
queue-4.13/ipv4-fix-traffic-triggered-ipsec-connections.patch