Patch "mpls: Send route delete notifications when router module is unloaded" has been added to the 4.9-stable tree

Patch "mpls: Send route delete notifications when router module is unloaded" has been added to the 4.9-stable tree

[gregkh]

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

    mpls: Send route delete notifications when router module is unloaded

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:
     mpls-send-route-delete-notifications-when-router-module-is-unloaded.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@vger.kernel.org> know about it.


>From foo@baz Sat Mar 18 22:03:25 CST 2017
From: David Ahern <dsa@cumulusnetworks.com>
Date: Fri, 10 Mar 2017 09:46:15 -0800
Subject: mpls: Send route delete notifications when router module is unloaded

From: David Ahern <dsa@cumulusnetworks.com>


[ Upstream commit e37791ec1ad785b59022ae211f63a16189bacebf ]

When the mpls_router module is unloaded, mpls routes are deleted but
notifications are not sent to userspace leaving userspace caches
out of sync. Add the call to mpls_notify_route in mpls_net_exit as
routes are freed.

Fixes: 0189197f44160 ("mpls: Basic routing support")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/mpls/af_mpls.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -1696,6 +1696,7 @@ static void mpls_net_exit(struct net *ne
 	for (index = 0; index < platform_labels; index++) {
 		struct mpls_route *rt = rtnl_dereference(platform_label[index]);
 		RCU_INIT_POINTER(platform_label[index], NULL);
+		mpls_notify_route(net, index, rt, NULL, NULL);
 		mpls_rt_free(rt);
 	}
 	rtnl_unlock();


Patches currently in stable-queue which might be from dsa@cumulusnetworks.com are

queue-4.9/vrf-fix-use-after-free-in-vrf_xmit.patch
queue-4.9/mpls-do-not-decrement-alive-counter-for-unregister-events.patch
queue-4.9/mpls-send-route-delete-notifications-when-router-module-is-unloaded.patch