netfilter: xtables: do not print any messages on ENOMEM

ENOMEM is a very obvious error code (cf. EINVAL), so I think we do not
really need a warning message. Not to mention that if the allocation
fails, the user is most likely going to get a stack trace from slab
already.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

net/bridge/netfilter/ebt_ulog.c

@@ -305,13 +305,10 @@ static int __init ebt_ulog_init(void)
 	ebtulognl = netlink_kernel_create(&init_net, NETLINK_NFLOG,
 					  EBT_ULOG_MAXNLGROUPS, NULL, NULL,
 					  THIS_MODULE);
-	if (!ebtulognl) {
-		printk(KERN_WARNING KBUILD_MODNAME ": out of memory trying to "
-		       "call netlink_kernel_create\n");
+	if (!ebtulognl)
 		ret = -ENOMEM;
-	} else if ((ret = xt_register_target(&ebt_ulog_tg_reg)) != 0) {
+	else if ((ret = xt_register_target(&ebt_ulog_tg_reg)) != 0)
 		netlink_kernel_release(ebtulognl);
-	}
 
 	if (ret == 0)
 		nf_log_register(NFPROTO_BRIDGE, &ebt_ulog_logger);

net/netfilter/xt_LED.c

@@ -92,10 +92,8 @@ static bool led_tg_check(const struct xt_tgchk_param *par)
 	}
 
 	ledinternal = kzalloc(sizeof(struct xt_led_info_internal), GFP_KERNEL);
-	if (!ledinternal) {
-		printk(KERN_CRIT KBUILD_MODNAME ": out of memory\n");
+	if (!ledinternal)
 		return false;
-	}
 
 	ledinternal->netfilter_led_trigger.name = ledinfo->id;
 

net/netfilter/xt_hashlimit.c

@@ -215,10 +215,8 @@ static int htable_create_v0(struct net *net, struct xt_hashlimit_info *minfo, u_
 	/* FIXME: don't use vmalloc() here or anywhere else -HW */
 	hinfo = vmalloc(sizeof(struct xt_hashlimit_htable) +
 			sizeof(struct list_head) * size);
-	if (!hinfo) {
-		printk(KERN_ERR "xt_hashlimit: unable to create hashtable\n");
+	if (!hinfo)
 		return -1;
-	}
 	minfo->hinfo = hinfo;
 
 	/* copy match config into hashtable config */
@@ -288,10 +286,8 @@ static int htable_create(struct net *net, struct xt_hashlimit_mtinfo1 *minfo,
 	/* FIXME: don't use vmalloc() here or anywhere else -HW */
 	hinfo = vmalloc(sizeof(struct xt_hashlimit_htable) +
 	                sizeof(struct list_head) * size);
-	if (hinfo == NULL) {
-		printk(KERN_ERR "xt_hashlimit: unable to create hashtable\n");
+	if (hinfo == NULL)
 		return -1;
-	}
 	minfo->hinfo = hinfo;
 
 	/* copy match config into hashtable config */

net/netfilter/xt_statistic.c

@@ -61,10 +61,8 @@ static bool statistic_mt_check(const struct xt_mtchk_param *par)
 		return false;
 
 	info->master = kzalloc(sizeof(*info->master), GFP_KERNEL);
-	if (info->master == NULL) {
-		printk(KERN_ERR KBUILD_MODNAME ": Out of memory\n");
+	if (info->master == NULL)
 		return false;
-	}
 	info->master->count = info->u.nth.count;
 
 	return true;