diff --git a/net/ipv4/netfilter/nf_nat_amanda.c b/net/ipv4/netfilter/nf_nat_amanda.c
index 7b22382..3c04d24 100644
--- a/net/ipv4/netfilter/nf_nat_amanda.c
+++ b/net/ipv4/netfilter/nf_nat_amanda.c
@@ -13,10 +13,10 @@
 #include <linux/skbuff.h>
 #include <linux/udp.h>
 
-#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
 #include <net/netfilter/nf_conntrack_helper.h>
 #include <net/netfilter/nf_conntrack_expect.h>
+#include <net/netfilter/nf_nat_helper.h>
+#include <net/netfilter/nf_nat_rule.h>
 #include <linux/netfilter/nf_conntrack_amanda.h>
 
 MODULE_AUTHOR("Brian J. Murrell <netfilter@interlinx.bc.ca>");
diff --git a/net/ipv4/netfilter/nf_nat_h323.c b/net/ipv4/netfilter/nf_nat_h323.c
index cad29c1..c6784a1 100644
--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -95,7 +95,7 @@
 			unsigned char **data,
 			TransportAddress *taddr, int count)
 {
-	const struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	const struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	int i;
 	__be16 port;
@@ -178,7 +178,7 @@
 			struct nf_conntrack_expect *rtp_exp,
 			struct nf_conntrack_expect *rtcp_exp)
 {
-	struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	int i;
 	u_int16_t nated_port;
@@ -330,7 +330,7 @@
 		    TransportAddress *taddr, __be16 port,
 		    struct nf_conntrack_expect *exp)
 {
-	struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	u_int16_t nated_port = ntohs(port);
 
@@ -419,7 +419,7 @@
 		    unsigned char **data, TransportAddress *taddr, int idx,
 		    __be16 port, struct nf_conntrack_expect *exp)
 {
-	struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	u_int16_t nated_port = ntohs(port);
 	union nf_inet_addr addr;
diff --git a/net/ipv4/netfilter/nf_nat_pptp.c b/net/ipv4/netfilter/nf_nat_pptp.c
index c273d58..3881408 100644
--- a/net/ipv4/netfilter/nf_nat_pptp.c
+++ b/net/ipv4/netfilter/nf_nat_pptp.c
@@ -49,7 +49,7 @@
 	const struct nf_nat_pptp *nat_pptp_info;
 	struct nf_nat_ipv4_range range;
 
-	ct_pptp_info = &nfct_help(master)->help.ct_pptp_info;
+	ct_pptp_info = nfct_help_data(master);
 	nat_pptp_info = &nfct_nat(master)->help.nat_pptp_info;
 
 	/* And here goes the grand finale of corrosion... */
@@ -123,7 +123,7 @@
 	__be16 new_callid;
 	unsigned int cid_off;
 
-	ct_pptp_info  = &nfct_help(ct)->help.ct_pptp_info;
+	ct_pptp_info = nfct_help_data(ct);
 	nat_pptp_info = &nfct_nat(ct)->help.nat_pptp_info;
 
 	new_callid = ct_pptp_info->pns_call_id;
@@ -192,7 +192,7 @@
 	struct nf_ct_pptp_master *ct_pptp_info;
 	struct nf_nat_pptp *nat_pptp_info;
 
-	ct_pptp_info  = &nfct_help(ct)->help.ct_pptp_info;
+	ct_pptp_info = nfct_help_data(ct);
 	nat_pptp_info = &nfct_nat(ct)->help.nat_pptp_info;
 
 	/* save original PAC call ID in nat_info */
diff --git a/net/ipv4/netfilter/nf_nat_tftp.c b/net/ipv4/netfilter/nf_nat_tftp.c
index a2901bf..9dbb8d2 100644
--- a/net/ipv4/netfilter/nf_nat_tftp.c
+++ b/net/ipv4/netfilter/nf_nat_tftp.c
@@ -8,10 +8,10 @@
 #include <linux/module.h>
 #include <linux/udp.h>
 
-#include <net/netfilter/nf_nat_helper.h>
-#include <net/netfilter/nf_nat_rule.h>
 #include <net/netfilter/nf_conntrack_helper.h>
 #include <net/netfilter/nf_conntrack_expect.h>
+#include <net/netfilter/nf_nat_helper.h>
+#include <net/netfilter/nf_nat_rule.h>
 #include <linux/netfilter/nf_conntrack_tftp.h>
 
 MODULE_AUTHOR("Magnus Boden <mb@ozaba.mine.nu>");
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 1ee2082..cf48755 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -819,7 +819,8 @@
 		__set_bit(IPS_EXPECTED_BIT, &ct->status);
 		ct->master = exp->master;
 		if (exp->helper) {
-			help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
+			help = nf_ct_helper_ext_add(ct, exp->helper,
+						    GFP_ATOMIC);
 			if (help)
 				rcu_assign_pointer(help->helper, exp->helper);
 		}
diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c
index 44e47c9..4bb771d 100644
--- a/net/netfilter/nf_conntrack_ftp.c
+++ b/net/netfilter/nf_conntrack_ftp.c
@@ -358,7 +358,7 @@
 	u32 seq;
 	int dir = CTINFO2DIR(ctinfo);
 	unsigned int uninitialized_var(matchlen), uninitialized_var(matchoff);
-	struct nf_ct_ftp_master *ct_ftp_info = &nfct_help(ct)->help.ct_ftp_info;
+	struct nf_ct_ftp_master *ct_ftp_info = nfct_help_data(ct);
 	struct nf_conntrack_expect *exp;
 	union nf_inet_addr *daddr;
 	struct nf_conntrack_man cmd = {};
@@ -554,6 +554,7 @@
 		ftp[i][0].tuple.src.l3num = PF_INET;
 		ftp[i][1].tuple.src.l3num = PF_INET6;
 		for (j = 0; j < 2; j++) {
+			ftp[i][j].data_len = sizeof(struct nf_ct_ftp_master);
 			ftp[i][j].tuple.src.u.tcp.port = htons(ports[i]);
 			ftp[i][j].tuple.dst.protonum = IPPROTO_TCP;
 			ftp[i][j].expect_policy = &ftp_exp_policy;
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index 46d69d7..ed21992 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -114,7 +114,7 @@
 			 struct nf_conn *ct, enum ip_conntrack_info ctinfo,
 			 unsigned char **data, int *datalen, int *dataoff)
 {
-	struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	const struct tcphdr *th;
 	struct tcphdr _tcph;
@@ -618,6 +618,7 @@
 static struct nf_conntrack_helper nf_conntrack_helper_h245 __read_mostly = {
 	.name			= "H.245",
 	.me			= THIS_MODULE,
+	.data_len		= sizeof(struct nf_ct_h323_master),
 	.tuple.src.l3num	= AF_UNSPEC,
 	.tuple.dst.protonum	= IPPROTO_UDP,
 	.help			= h245_help,
@@ -1170,6 +1171,7 @@
 	{
 		.name			= "Q.931",
 		.me			= THIS_MODULE,
+		.data_len		= sizeof(struct nf_ct_h323_master),
 		.tuple.src.l3num	= AF_INET,
 		.tuple.src.u.tcp.port	= cpu_to_be16(Q931_PORT),
 		.tuple.dst.protonum	= IPPROTO_TCP,
@@ -1245,7 +1247,7 @@
 		       unsigned char **data,
 		       TransportAddress *taddr, int count)
 {
-	struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	int ret = 0;
 	int i;
@@ -1360,7 +1362,7 @@
 		       enum ip_conntrack_info ctinfo,
 		       unsigned char **data, RegistrationRequest *rrq)
 {
-	struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int ret;
 	typeof(set_ras_addr_hook) set_ras_addr;
 
@@ -1395,7 +1397,7 @@
 		       enum ip_conntrack_info ctinfo,
 		       unsigned char **data, RegistrationConfirm *rcf)
 {
-	struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	int ret;
 	struct nf_conntrack_expect *exp;
@@ -1444,7 +1446,7 @@
 		       enum ip_conntrack_info ctinfo,
 		       unsigned char **data, UnregistrationRequest *urq)
 {
-	struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	int ret;
 	typeof(set_sig_addr_hook) set_sig_addr;
@@ -1476,7 +1478,7 @@
 		       enum ip_conntrack_info ctinfo,
 		       unsigned char **data, AdmissionRequest *arq)
 {
-	const struct nf_ct_h323_master *info = &nfct_help(ct)->help.ct_h323_info;
+	const struct nf_ct_h323_master *info = nfct_help_data(ct);
 	int dir = CTINFO2DIR(ctinfo);
 	__be16 port;
 	union nf_inet_addr addr;
@@ -1743,6 +1745,7 @@
 	{
 		.name			= "RAS",
 		.me			= THIS_MODULE,
+		.data_len		= sizeof(struct nf_ct_h323_master),
 		.tuple.src.l3num	= AF_INET,
 		.tuple.src.u.udp.port	= cpu_to_be16(RAS_PORT),
 		.tuple.dst.protonum	= IPPROTO_UDP,
@@ -1752,6 +1755,7 @@
 	{
 		.name			= "RAS",
 		.me			= THIS_MODULE,
+		.data_len		= sizeof(struct nf_ct_h323_master),
 		.tuple.src.l3num	= AF_INET6,
 		.tuple.src.u.udp.port	= cpu_to_be16(RAS_PORT),
 		.tuple.dst.protonum	= IPPROTO_UDP,
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c
index 4fa2ff9..9c18ecb 100644
--- a/net/netfilter/nf_conntrack_helper.c
+++ b/net/netfilter/nf_conntrack_helper.c
@@ -161,11 +161,14 @@
 }
 EXPORT_SYMBOL_GPL(nf_conntrack_helper_try_module_get);
 
-struct nf_conn_help *nf_ct_helper_ext_add(struct nf_conn *ct, gfp_t gfp)
+struct nf_conn_help *
+nf_ct_helper_ext_add(struct nf_conn *ct,
+		     struct nf_conntrack_helper *helper, gfp_t gfp)
 {
 	struct nf_conn_help *help;
 
-	help = nf_ct_ext_add(ct, NF_CT_EXT_HELPER, gfp);
+	help = nf_ct_ext_add_length(ct, NF_CT_EXT_HELPER,
+				    helper->data_len, gfp);
 	if (help)
 		INIT_HLIST_HEAD(&help->expectations);
 	else
@@ -218,13 +221,13 @@
 	}
 
 	if (help == NULL) {
-		help = nf_ct_helper_ext_add(ct, flags);
+		help = nf_ct_helper_ext_add(ct, helper, flags);
 		if (help == NULL) {
 			ret = -ENOMEM;
 			goto out;
 		}
 	} else {
-		memset(&help->help, 0, sizeof(help->help));
+		memset(help->data, 0, helper->data_len);
 	}
 
 	rcu_assign_pointer(help->helper, helper);
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 6f4b00a..a088920 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -1218,7 +1218,7 @@
 		if (help->helper)
 			return -EBUSY;
 		/* need to zero data of old helper */
-		memset(&help->help, 0, sizeof(help->help));
+		memset(help->data, 0, help->helper->data_len);
 	} else {
 		/* we cannot set a helper for an existing conntrack */
 		return -EOPNOTSUPP;
@@ -1440,7 +1440,7 @@
 		} else {
 			struct nf_conn_help *help;
 
-			help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
+			help = nf_ct_helper_ext_add(ct, helper, GFP_ATOMIC);
 			if (help == NULL) {
 				err = -ENOMEM;
 				goto err2;
diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c
index 31d56b2..6fed9ec 100644
--- a/net/netfilter/nf_conntrack_pptp.c
+++ b/net/netfilter/nf_conntrack_pptp.c
@@ -174,7 +174,7 @@
 static void pptp_destroy_siblings(struct nf_conn *ct)
 {
 	struct net *net = nf_ct_net(ct);
-	const struct nf_conn_help *help = nfct_help(ct);
+	const struct nf_ct_pptp_master *ct_pptp_info = nfct_help_data(ct);
 	struct nf_conntrack_tuple t;
 
 	nf_ct_gre_keymap_destroy(ct);
@@ -182,16 +182,16 @@
 	/* try original (pns->pac) tuple */
 	memcpy(&t, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple, sizeof(t));
 	t.dst.protonum = IPPROTO_GRE;
-	t.src.u.gre.key = help->help.ct_pptp_info.pns_call_id;
-	t.dst.u.gre.key = help->help.ct_pptp_info.pac_call_id;
+	t.src.u.gre.key = ct_pptp_info->pns_call_id;
+	t.dst.u.gre.key = ct_pptp_info->pac_call_id;
 	if (!destroy_sibling_or_exp(net, ct, &t))
 		pr_debug("failed to timeout original pns->pac ct/exp\n");
 
 	/* try reply (pac->pns) tuple */
 	memcpy(&t, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, sizeof(t));
 	t.dst.protonum = IPPROTO_GRE;
-	t.src.u.gre.key = help->help.ct_pptp_info.pac_call_id;
-	t.dst.u.gre.key = help->help.ct_pptp_info.pns_call_id;
+	t.src.u.gre.key = ct_pptp_info->pac_call_id;
+	t.dst.u.gre.key = ct_pptp_info->pns_call_id;
 	if (!destroy_sibling_or_exp(net, ct, &t))
 		pr_debug("failed to timeout reply pac->pns ct/exp\n");
 }
@@ -269,7 +269,7 @@
 		 struct nf_conn *ct,
 		 enum ip_conntrack_info ctinfo)
 {
-	struct nf_ct_pptp_master *info = &nfct_help(ct)->help.ct_pptp_info;
+	struct nf_ct_pptp_master *info = nfct_help_data(ct);
 	u_int16_t msg;
 	__be16 cid = 0, pcid = 0;
 	typeof(nf_nat_pptp_hook_inbound) nf_nat_pptp_inbound;
@@ -396,7 +396,7 @@
 		  struct nf_conn *ct,
 		  enum ip_conntrack_info ctinfo)
 {
-	struct nf_ct_pptp_master *info = &nfct_help(ct)->help.ct_pptp_info;
+	struct nf_ct_pptp_master *info = nfct_help_data(ct);
 	u_int16_t msg;
 	__be16 cid = 0, pcid = 0;
 	typeof(nf_nat_pptp_hook_outbound) nf_nat_pptp_outbound;
@@ -506,7 +506,7 @@
 
 {
 	int dir = CTINFO2DIR(ctinfo);
-	const struct nf_ct_pptp_master *info = &nfct_help(ct)->help.ct_pptp_info;
+	const struct nf_ct_pptp_master *info = nfct_help_data(ct);
 	const struct tcphdr *tcph;
 	struct tcphdr _tcph;
 	const struct pptp_pkt_hdr *pptph;
@@ -592,6 +592,7 @@
 static struct nf_conntrack_helper pptp __read_mostly = {
 	.name			= "pptp",
 	.me			= THIS_MODULE,
+	.data_len		= sizeof(struct nf_ct_pptp_master),
 	.tuple.src.l3num	= AF_INET,
 	.tuple.src.u.tcp.port	= cpu_to_be16(PPTP_CONTROL_PORT),
 	.tuple.dst.protonum	= IPPROTO_TCP,
diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c
index 25ba5a2..5cac41c 100644
--- a/net/netfilter/nf_conntrack_proto_gre.c
+++ b/net/netfilter/nf_conntrack_proto_gre.c
@@ -117,10 +117,10 @@
 {
 	struct net *net = nf_ct_net(ct);
 	struct netns_proto_gre *net_gre = gre_pernet(net);
-	struct nf_conn_help *help = nfct_help(ct);
+	struct nf_ct_pptp_master *ct_pptp_info = nfct_help_data(ct);
 	struct nf_ct_gre_keymap **kmp, *km;
 
-	kmp = &help->help.ct_pptp_info.keymap[dir];
+	kmp = &ct_pptp_info->keymap[dir];
 	if (*kmp) {
 		/* check whether it's a retransmission */
 		read_lock_bh(&net_gre->keymap_lock);
@@ -158,19 +158,19 @@
 {
 	struct net *net = nf_ct_net(ct);
 	struct netns_proto_gre *net_gre = gre_pernet(net);
-	struct nf_conn_help *help = nfct_help(ct);
+	struct nf_ct_pptp_master *ct_pptp_info = nfct_help_data(ct);
 	enum ip_conntrack_dir dir;
 
 	pr_debug("entering for ct %p\n", ct);
 
 	write_lock_bh(&net_gre->keymap_lock);
 	for (dir = IP_CT_DIR_ORIGINAL; dir < IP_CT_DIR_MAX; dir++) {
-		if (help->help.ct_pptp_info.keymap[dir]) {
+		if (ct_pptp_info->keymap[dir]) {
 			pr_debug("removing %p from list\n",
-				 help->help.ct_pptp_info.keymap[dir]);
-			list_del(&help->help.ct_pptp_info.keymap[dir]->list);
-			kfree(help->help.ct_pptp_info.keymap[dir]);
-			help->help.ct_pptp_info.keymap[dir] = NULL;
+				 ct_pptp_info->keymap[dir]);
+			list_del(&ct_pptp_info->keymap[dir]->list);
+			kfree(ct_pptp_info->keymap[dir]);
+			ct_pptp_info->keymap[dir] = NULL;
 		}
 	}
 	write_unlock_bh(&net_gre->keymap_lock);
diff --git a/net/netfilter/nf_conntrack_sane.c b/net/netfilter/nf_conntrack_sane.c
index ec3fc18..295429f 100644
--- a/net/netfilter/nf_conntrack_sane.c
+++ b/net/netfilter/nf_conntrack_sane.c
@@ -69,13 +69,12 @@
 	void *sb_ptr;
 	int ret = NF_ACCEPT;
 	int dir = CTINFO2DIR(ctinfo);
-	struct nf_ct_sane_master *ct_sane_info;
+	struct nf_ct_sane_master *ct_sane_info = nfct_help_data(ct);
 	struct nf_conntrack_expect *exp;
 	struct nf_conntrack_tuple *tuple;
 	struct sane_request *req;
 	struct sane_reply_net_start *reply;
 
-	ct_sane_info = &nfct_help(ct)->help.ct_sane_info;
 	/* Until there's been traffic both ways, don't look in packets. */
 	if (ctinfo != IP_CT_ESTABLISHED &&
 	    ctinfo != IP_CT_ESTABLISHED_REPLY)
@@ -203,6 +202,7 @@
 		sane[i][0].tuple.src.l3num = PF_INET;
 		sane[i][1].tuple.src.l3num = PF_INET6;
 		for (j = 0; j < 2; j++) {
+			sane[i][j].data_len = sizeof(struct nf_ct_sane_master);
 			sane[i][j].tuple.src.u.tcp.port = htons(ports[i]);
 			sane[i][j].tuple.dst.protonum = IPPROTO_TCP;
 			sane[i][j].expect_policy = &sane_exp_policy;
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index dfd3ff3..758a1ba 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -1075,12 +1075,12 @@
 {
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
-	struct nf_conn_help *help = nfct_help(ct);
+	struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
 
 	if ((code >= 100 && code <= 199) ||
 	    (code >= 200 && code <= 299))
 		return process_sdp(skb, dataoff, dptr, datalen, cseq);
-	else if (help->help.ct_sip_info.invite_cseq == cseq)
+	else if (ct_sip_info->invite_cseq == cseq)
 		flush_expectations(ct, true);
 	return NF_ACCEPT;
 }
@@ -1091,12 +1091,12 @@
 {
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
-	struct nf_conn_help *help = nfct_help(ct);
+	struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
 
 	if ((code >= 100 && code <= 199) ||
 	    (code >= 200 && code <= 299))
 		return process_sdp(skb, dataoff, dptr, datalen, cseq);
-	else if (help->help.ct_sip_info.invite_cseq == cseq)
+	else if (ct_sip_info->invite_cseq == cseq)
 		flush_expectations(ct, true);
 	return NF_ACCEPT;
 }
@@ -1107,12 +1107,12 @@
 {
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
-	struct nf_conn_help *help = nfct_help(ct);
+	struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
 
 	if ((code >= 100 && code <= 199) ||
 	    (code >= 200 && code <= 299))
 		return process_sdp(skb, dataoff, dptr, datalen, cseq);
-	else if (help->help.ct_sip_info.invite_cseq == cseq)
+	else if (ct_sip_info->invite_cseq == cseq)
 		flush_expectations(ct, true);
 	return NF_ACCEPT;
 }
@@ -1123,13 +1123,13 @@
 {
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
-	struct nf_conn_help *help = nfct_help(ct);
+	struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
 	unsigned int ret;
 
 	flush_expectations(ct, true);
 	ret = process_sdp(skb, dataoff, dptr, datalen, cseq);
 	if (ret == NF_ACCEPT)
-		help->help.ct_sip_info.invite_cseq = cseq;
+		ct_sip_info->invite_cseq = cseq;
 	return ret;
 }
 
@@ -1154,7 +1154,7 @@
 {
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
-	struct nf_conn_help *help = nfct_help(ct);
+	struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
 	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
 	unsigned int matchoff, matchlen;
 	struct nf_conntrack_expect *exp;
@@ -1235,7 +1235,7 @@
 
 store_cseq:
 	if (ret == NF_ACCEPT)
-		help->help.ct_sip_info.register_cseq = cseq;
+		ct_sip_info->register_cseq = cseq;
 	return ret;
 }
 
@@ -1245,7 +1245,7 @@
 {
 	enum ip_conntrack_info ctinfo;
 	struct nf_conn *ct = nf_ct_get(skb, &ctinfo);
-	struct nf_conn_help *help = nfct_help(ct);
+	struct nf_ct_sip_master *ct_sip_info = nfct_help_data(ct);
 	enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo);
 	union nf_inet_addr addr;
 	__be16 port;
@@ -1262,7 +1262,7 @@
 	 * responses, so we store the sequence number of the last valid
 	 * request and compare it here.
 	 */
-	if (help->help.ct_sip_info.register_cseq != cseq)
+	if (ct_sip_info->register_cseq != cseq)
 		return NF_ACCEPT;
 
 	if (code >= 100 && code <= 199)
@@ -1578,6 +1578,7 @@
 		sip[i][3].help = sip_help_tcp;
 
 		for (j = 0; j < ARRAY_SIZE(sip[i]); j++) {
+			sip[i][j].data_len = sizeof(struct nf_ct_sip_master);
 			sip[i][j].tuple.src.u.udp.port = htons(ports[i]);
 			sip[i][j].expect_policy = sip_exp_policy;
 			sip[i][j].expect_class_max = SIP_EXPECT_MAX;
diff --git a/net/netfilter/xt_CT.c b/net/netfilter/xt_CT.c
index a51de9b..1160185 100644
--- a/net/netfilter/xt_CT.c
+++ b/net/netfilter/xt_CT.c
@@ -112,6 +112,8 @@
 		goto err3;
 
 	if (info->helper[0]) {
+		struct nf_conntrack_helper *helper;
+
 		ret = -ENOENT;
 		proto = xt_ct_find_proto(par);
 		if (!proto) {
@@ -120,19 +122,21 @@
 			goto err3;
 		}
 
-		ret = -ENOMEM;
-		help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
-		if (help == NULL)
-			goto err3;
-
 		ret = -ENOENT;
-		help->helper = nf_conntrack_helper_try_module_get(info->helper,
-								  par->family,
-								  proto);
-		if (help->helper == NULL) {
+		helper = nf_conntrack_helper_try_module_get(info->helper,
+							    par->family,
+							    proto);
+		if (helper == NULL) {
 			pr_info("No such helper \"%s\"\n", info->helper);
 			goto err3;
 		}
+
+		ret = -ENOMEM;
+		help = nf_ct_helper_ext_add(ct, helper, GFP_KERNEL);
+		if (help == NULL)
+			goto err3;
+
+		help->helper = helper;
 	}
 
 	__set_bit(IPS_TEMPLATE_BIT, &ct->status);
@@ -202,6 +206,8 @@
 		goto err3;
 
 	if (info->helper[0]) {
+		struct nf_conntrack_helper *helper;
+
 		ret = -ENOENT;
 		proto = xt_ct_find_proto(par);
 		if (!proto) {
@@ -210,19 +216,21 @@
 			goto err3;
 		}
 
-		ret = -ENOMEM;
-		help = nf_ct_helper_ext_add(ct, GFP_KERNEL);
-		if (help == NULL)
-			goto err3;
-
 		ret = -ENOENT;
-		help->helper = nf_conntrack_helper_try_module_get(info->helper,
-								  par->family,
-								  proto);
-		if (help->helper == NULL) {
+		helper = nf_conntrack_helper_try_module_get(info->helper,
+							    par->family,
+							    proto);
+		if (helper == NULL) {
 			pr_info("No such helper \"%s\"\n", info->helper);
 			goto err3;
 		}
+
+		ret = -ENOMEM;
+		help = nf_ct_helper_ext_add(ct, helper, GFP_KERNEL);
+		if (help == NULL)
+			goto err3;
+
+		help->helper = helper;
 	}
 
 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT