[IPV6] ROUTE: Do not route packets to link-local address on other device.
With help from Wei Dong <weid@np.css.fujitsu.com>.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index f4fda80..19c906f 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -311,12 +311,21 @@
static int inline rt6_check_dev(struct rt6_info *rt, int oif)
{
struct net_device *dev = rt->rt6i_dev;
- if (!oif || dev->ifindex == oif)
+ int ret = 0;
+
+ if (!oif)
return 2;
- if ((dev->flags & IFF_LOOPBACK) &&
- rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif)
- return 1;
- return 0;
+ if (dev->flags & IFF_LOOPBACK) {
+ if (!WARN_ON(rt->rt6i_idev == NULL) &&
+ rt->rt6i_idev->dev->ifindex == oif)
+ ret = 1;
+ else
+ return 0;
+ }
+ if (dev->ifindex == oif)
+ return 2;
+
+ return ret;
}
static int inline rt6_check_neigh(struct rt6_info *rt)