netfilter: nfnetlink_log: remove unnecessary error messages

In case of OOM, there's nothing userspace can do.

If there's no room to put the payload in __build_packet_message(),
jump to nla_put_failure which already performs the corresponding
error reporting.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nfnetlink_log.c

@@ -334,9 +334,6 @@ nfulnl_alloc_skb(struct net *net, u32 peer_portid, unsigned int inst_size,
 
 			skb = nfnetlink_alloc_skb(net, pkt_size,
 						  peer_portid, GFP_ATOMIC);
-			if (!skb)
-				pr_err("nfnetlink_log: can't even alloc %u bytes\n",
-				       pkt_size);
 		}
 	}
 
@@ -568,10 +565,8 @@ __build_packet_message(struct nfnl_log_net *log,
 		struct nlattr *nla;
 		int size = nla_attr_size(data_len);
 
-		if (skb_tailroom(inst->skb) < nla_total_size(data_len)) {
-			printk(KERN_WARNING "nfnetlink_log: no tailroom!\n");
-			return -1;
-		}
+		if (skb_tailroom(inst->skb) < nla_total_size(data_len))
+			goto nla_put_failure;
 
 		nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len));
 		nla->nla_type = NFULA_PAYLOAD;