net: Use non-zero allocations in dst_alloc().

Make dst_alloc() and it's users explicitly initialize the entire
entry.

The zero'ing done by kmem_cache_zalloc() was almost entirely
redundant.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 1 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index e8b2bb9060ef..f1be5c5c85ef 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -230,7 +230,11 @@ static struct rt6_info ip6_blk_hole_entry_template = {
 static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops,
                                              struct net_device *dev)
 {
-        return (struct rt6_info *)dst_alloc(ops, dev, 0, 0, 0);
+        struct rt6_info *rt = dst_alloc(ops, dev, 0, 0, 0);
+
+        memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry));
+
+        return rt;
 }
 
 static void ip6_dst_destroy(struct dst_entry *dst)
@@ -887,6 +891,8 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
 
         rt = dst_alloc(&ip6_dst_blackhole_ops, ort->dst.dev, 1, 0, 0);
         if (rt) {
+                memset(&rt->rt6i_table, 0, sizeof(*rt) - sizeof(struct dst_entry));
+
                 new = &rt->dst;
 
                 new->__use = 1;