[IPV6]: Fix [Bug 5306] Oops on IPv6 route lookup

> Steps to reproduce:
> 1. Boot Linux, do NOT setup any IPv6 routes
> 2. ip route get 2001::1 (or any unroutable address)

Well caught.  We never set rt6i_idev on ip6_null_entry.
This patch should make the problem go away.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 2fea3f4402a0..4e509e52fbc1 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3520,6 +3520,8 @@ int __init addrconf_init(void)
         if (err)
                 return err;
 
+        ip6_null_entry.rt6i_idev = in6_dev_get(&loopback_dev);
+
         register_netdevice_notifier(&ipv6_dev_notf);
 
 #ifdef CONFIG_IPV6_PRIVACY