[NETLABEL]: Use kmemdup in cipso_ipv4.c

Code diff stats:

[acme@newtoy net-2.6.20]$ codiff /tmp/cipso_ipv4.o.before /tmp/cipso_ipv4.o.after
/pub/scm/linux/kernel/git/acme/net-2.6.20/net/ipv4/cipso_ipv4.c:
  cipso_v4_cache_add |  -46
 1 function changed, 46 bytes removed
[acme@newtoy net-2.6.20]$
Signed-off-by: NArnaldo Carvalho de Melo <acme@mandriva.com>

net/ipv4/cipso_ipv4.c

@@ -377,12 +377,11 @@ int cipso_v4_cache_add(const struct sk_buff *skb,
 	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
 	if (entry == NULL)
 		return -ENOMEM;
-	entry->key = kmalloc(cipso_ptr_len, GFP_ATOMIC);
+	entry->key = kmemdup(cipso_ptr, cipso_ptr_len, GFP_ATOMIC);
 	if (entry->key == NULL) {
 		ret_val = -ENOMEM;
 		goto cache_add_failure;
 	}
-	memcpy(entry->key, cipso_ptr, cipso_ptr_len);
 	entry->key_len = cipso_ptr_len;
 	entry->hash = cipso_v4_map_cache_hash(cipso_ptr, cipso_ptr_len);
 	atomic_inc(&secattr->cache->refcount);