[PATCH 4.10 40/63] mpls: Send route delete notifications when router module is unloaded

[Greg Kroah-Hartman]

4.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Ahern <d...@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 <d...@cumulusnetworks.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@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();