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%3Ba=su...

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