IPv6: keep route for tentative address

Recent changes preserve IPv6 address when link goes down (good).
But would cause address to point to dead dst entry (bad).
The simplest fix is to just not delete route if address is
being held for later use.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 1b00bfef268e..a9913d23f7c7 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4047,7 +4047,8 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
                         addrconf_leave_anycast(ifp);
                 addrconf_leave_solict(ifp->idev, &ifp->addr);
                 dst_hold(&ifp->rt->u.dst);
-                if (ip6_del_rt(ifp->rt))
+
+                if (ifp->dead && ip6_del_rt(ifp->rt))
                         dst_free(&ifp->rt->u.dst);
                 break;
         }