ipv6: Don't add routes to ipv6 disabled interfaces.

If the interface has IPv6 disabled, don't add a multicast or
link-local route since we won't be adding a link-local address.

Reported-by: Mahesh Kelkar <maheshkelkar@gmail.com>
Signed-off-by: Brian Haley <brian.haley@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index e1a698d..784f34d 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1760,7 +1760,10 @@ static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
 
        idev = ipv6_find_idev(dev);
        if (!idev)
-               return NULL;
+               return ERR_PTR(-ENOBUFS);
+
+       if (idev->cnf.disable_ipv6)
+               return ERR_PTR(-EACCES);
 
        /* Add default multicast route */
        addrconf_add_mroute(dev);
@@ -2129,8 +2132,9 @@ static int inet6_addr_add(struct net *net, int ifindex, struct in6_addr *pfx,
        if (!dev)
                return -ENODEV;
 
-       if ((idev = addrconf_add_dev(dev)) == NULL)
-               return -ENOBUFS;
+       idev = addrconf_add_dev(dev);
+       if (IS_ERR(idev))
+               return PTR_ERR(idev);
 
        scope = ipv6_addr_scope(pfx);
 
@@ -2377,7 +2381,7 @@ static void addrconf_dev_config(struct net_device *dev)
        }
 
        idev = addrconf_add_dev(dev);
-       if (idev == NULL)
+       if (IS_ERR(idev))
                return;
 
        memset(&addr, 0, sizeof(struct in6_addr));
@@ -2468,7 +2472,7 @@ static void addrconf_ip6_tnl_config(struct net_device *dev)
        ASSERT_RTNL();
 
        idev = addrconf_add_dev(dev);
-       if (!idev) {
+       if (IS_ERR(idev)) {
                printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
                return;
        }