1 files changed, 25 insertions, 12 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 9e69eb0ec6dd..fb545edef6ea 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -104,6 +104,9 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
         struct inet_peer *peer;
         u32 *p = NULL;
 
+        if (!(rt->dst.flags & DST_HOST))
+                return NULL;
+
         if (!rt->rt6i_peer)
                 rt6_bind_peer(rt, 1);
 
@@ -241,7 +244,9 @@ static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops,
 {
         struct rt6_info *rt = dst_alloc(ops, dev, 0, 0, flags);
 
-        memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry));
+        if (rt != NULL)
+                memset(&rt->rt6i_table, 0,
+                        sizeof(*rt) - sizeof(struct dst_entry));
 
         return rt;
 }
@@ -252,6 +257,9 @@ static void ip6_dst_destroy(struct dst_entry *dst)
         struct inet6_dev *idev = rt->rt6i_idev;
         struct inet_peer *peer = rt->rt6i_peer;
 
+        if (!(rt->dst.flags & DST_HOST))
+                dst_destroy_metrics_generic(dst);
+
         if (idev != NULL) {
                 rt->rt6i_idev = NULL;
                 in6_dev_put(idev);
@@ -723,9 +731,7 @@ static struct rt6_info *rt6_alloc_cow(const struct rt6_info *ort,
                         ipv6_addr_copy(&rt->rt6i_gateway, daddr);
                 }
 
-                rt->rt6i_dst.plen = 128;
                 rt->rt6i_flags |= RTF_CACHE;
-                rt->dst.flags |= DST_HOST;
 
 #ifdef CONFIG_IPV6_SUBTREES
                 if (rt->rt6i_src.plen && saddr) {
@@ -775,9 +781,7 @@ static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort,
         struct rt6_info *rt = ip6_rt_copy(ort, daddr);
 
         if (rt) {
-                rt->rt6i_dst.plen = 128;
                 rt->rt6i_flags |= RTF_CACHE;
-                rt->dst.flags |= DST_HOST;
                 dst_set_neighbour(&rt->dst, neigh_clone(dst_get_neighbour_raw(&ort->dst)));
         }
         return rt;
@@ -1078,12 +1082,15 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
                         neigh = NULL;
         }
 
-        rt->rt6i_idev     = idev;
+        rt->dst.flags |= DST_HOST;
+        rt->dst.output  = ip6_output;
         dst_set_neighbour(&rt->dst, neigh);
         atomic_set(&rt->dst.__refcnt, 1);
-        ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
         dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 255);
-        rt->dst.output  = ip6_output;
+
+        ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
+        rt->rt6i_dst.plen = 128;
+        rt->rt6i_idev     = idev;
 
         spin_lock_bh(&icmp6_dst_lock);
         rt->dst.next = icmp6_dst_gc_list;
@@ -1261,6 +1268,14 @@ int ip6_route_add(struct fib6_config *cfg)
         if (rt->rt6i_dst.plen == 128)
                rt->dst.flags |= DST_HOST;
 
+        if (!(rt->dst.flags & DST_HOST) && cfg->fc_mx) {
+                u32 *metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL);
+                if (!metrics) {
+                        err = -ENOMEM;
+                        goto out;
+                }
+                dst_init_metrics(&rt->dst, metrics, 0);
+        }
 #ifdef CONFIG_IPV6_SUBTREES
         ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len);
         rt->rt6i_src.plen = cfg->fc_src_len;
@@ -1607,9 +1622,6 @@ void rt6_redirect(const struct in6_addr *dest, const struct in6_addr *src,
         if (on_link)
                 nrt->rt6i_flags &= ~RTF_GATEWAY;
 
-        nrt->rt6i_dst.plen = 128;
-        nrt->dst.flags |= DST_HOST;
-
         ipv6_addr_copy(&nrt->rt6i_gateway, (struct in6_addr*)neigh->primary_key);
         dst_set_neighbour(&nrt->dst, neigh_clone(neigh));
 
@@ -1754,9 +1766,10 @@ static struct rt6_info *ip6_rt_copy(const struct rt6_info *ort,
         if (rt) {
                 rt->dst.input = ort->dst.input;
                 rt->dst.output = ort->dst.output;
+                rt->dst.flags |= DST_HOST;
 
                 ipv6_addr_copy(&rt->rt6i_dst.addr, dest);
-                rt->rt6i_dst.plen = ort->rt6i_dst.plen;
+                rt->rt6i_dst.plen = 128;
                 dst_copy_metrics(&rt->dst, &ort->dst);
                 rt->dst.error = ort->dst.error;
                 rt->rt6i_idev = ort->rt6i_idev;