Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) Fix a deadlock when module is requested via netlink_bind()
in nfnetlink, from Florian Westphal.

2) Fix ipt_rpfilter and ip6t_rpfilter with VRF, from Miaohe Lin.

3) Skip master comparison in SIP helper to fix expectation clash
under two valid scenarios, from xiao ruizhu.

4) Remove obsolete comments in nf_conntrack codebase, from
Yonatan Goldschmidt.

5) Fix redirect extension module autoload, from Christian Hesse.

6) Fix incorrect mssg option sent to client in synproxy,
from Fernando Fernandez.

7) Fix incorrect window calculations in TCP conntrack, from
Florian Westphal.

8) Don't bail out when updating basechain policy due to recent
offload works, also from Florian.

9) Allow symhash to use modulus 1 as other hash extensions do,
from Laura.Garcia.

10) Missing NAT chain module autoload for the inet family,
from Phil Sutter.

11) Fix missing adjustment of TCP RST packet in synproxy,
from Fernando Fernandez.

12) Skip EAGAIN path when nft_meta_bridge is built-in or
not selected.

13) Conntrack bridge does not depend on nf_tables_bridge.

14) Turn NF_TABLES_BRIDGE into tristate to fix possible
link break of nft_meta_bridge, from Arnd Bergmann.
====================

Signed-off-by: David S. Miller <[e-mail]>

include/linux/netfilter/nf_conntrack_h323_asn1.h

···
 /* SPDX-License-Identifier: GPL-2.0-only */
 /****************************************************************************
- * ip_conntrack_h323_asn1.h - BER and PER decoding library for H.323
- * 			      conntrack/NAT module.
+ * BER and PER decoding library for H.323 conntrack/NAT module.
  *
  * Copyright (c) 2006 by Jing Min Zhao <[e-mail]>
  *

include/net/netfilter/nf_conntrack_expect.h

···
 #define NF_CT_EXPECT_CLASS_DEFAULT	0
 #define NF_CT_EXPECT_MAX_CNT		255
 
+/* Allow to reuse expectations with the same tuples from different master
+ * conntracks.
+ */
+#define NF_CT_EXP_F_SKIP_MASTER	0x1
+
 int nf_conntrack_expect_pernet_init(struct net *net);
 void nf_conntrack_expect_pernet_fini(struct net *net);
 
···
 		       u_int8_t, const __be16 *, const __be16 *);
 void nf_ct_expect_put(struct nf_conntrack_expect *exp);
 int nf_ct_expect_related_report(struct nf_conntrack_expect *expect, 
-				u32 portid, int report);
-static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect)
+				u32 portid, int report, unsigned int flags);
+static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect,
+				       unsigned int flags)
 {
-	return nf_ct_expect_related_report(expect, 0, 0);
+	return nf_ct_expect_related_report(expect, 0, 0, flags);
 }
 
 #endif /*_NF_CONNTRACK_EXPECT_H*/

include/net/netfilter/nf_conntrack_synproxy.h

···
 	u8				options;
 	u8				wscale;
 	u16				mss;
+	u16				mss_encode;
 	u32				tsval;
 	u32				tsecr;
 };

net/bridge/netfilter/Kconfig

···
 menuconfig NF_TABLES_BRIDGE
 	depends on BRIDGE && NETFILTER && NF_TABLES
 	select NETFILTER_FAMILY_BRIDGE
-	bool "Ethernet Bridge nf_tables support"
+	tristate "Ethernet Bridge nf_tables support"
 
 if NF_TABLES_BRIDGE
 
···
 	tristate "Bridge packet logging"
 	select NF_LOG_COMMON
 
+endif # NF_TABLES_BRIDGE
+
 config NF_CONNTRACK_BRIDGE
 	tristate "IPv4/IPV6 bridge connection tracking support"
 	depends on NF_CONNTRACK
···
 	  infrastructure.
 
 	  To compile it as a module, choose M here.  If unsure, say N.
-
-endif # NF_TABLES_BRIDGE
 
 menuconfig BRIDGE_NF_EBTABLES
 	tristate "Ethernet Bridge tables (ebtables) support"

net/ipv4/netfilter/ipt_CLUSTERIP.c

···
 	     ctinfo == IP_CT_RELATED_REPLY))
 		return XT_CONTINUE;
 
-	/* ip_conntrack_icmp guarantees us that we only have ICMP_ECHO,
-	 * TIMESTAMP, INFO_REQUEST or ADDRESS type icmp packets from here
+	/* nf_conntrack_proto_icmp guarantees us that we only have ICMP_ECHO,
+	 * TIMESTAMP, INFO_REQUEST or ICMP_ADDRESS type icmp packets from here
 	 * on, which all have an ID field [relevant for hashing]. */
 
 	hash = clusterip_hashfn(skb, cipinfo->config);

net/ipv4/netfilter/ipt_SYNPROXY.c

···
 			opts.options |= XT_SYNPROXY_OPT_ECN;
 
 		opts.options &= info->options;
+		opts.mss_encode = opts.mss;
+		opts.mss = info->mss;
 		if (opts.options & XT_SYNPROXY_OPT_TIMESTAMP)
 			synproxy_init_timestamp_cookie(info, &opts);
 		else

net/ipv4/netfilter/ipt_rpfilter.c

···
 	flow.flowi4_mark = info->flags & XT_RPFILTER_VALID_MARK ? skb->mark : 0;
 	flow.flowi4_tos = RT_TOS(iph->tos);
 	flow.flowi4_scope = RT_SCOPE_UNIVERSE;
+	flow.flowi4_oif = l3mdev_master_ifindex_rcu(xt_in(par));
 
 	return rpfilter_lookup_reverse(xt_net(par), &flow, xt_in(par), info->flags) ^ invert;
 }

net/ipv4/netfilter/nf_nat_h323.c

···
 		int ret;
 
 		rtp_exp->tuple.dst.u.udp.port = htons(nated_port);
-		ret = nf_ct_expect_related(rtp_exp);
+		ret = nf_ct_expect_related(rtp_exp, 0);
 		if (ret == 0) {
 			rtcp_exp->tuple.dst.u.udp.port =
 			    htons(nated_port + 1);
-			ret = nf_ct_expect_related(rtcp_exp);
+			ret = nf_ct_expect_related(rtcp_exp, 0);
 			if (ret == 0)
 				break;
 			else if (ret == -EBUSY) {
···
 		int ret;
 
 		exp->tuple.dst.u.tcp.port = htons(nated_port);
-		ret = nf_ct_expect_related(exp);
+		ret = nf_ct_expect_related(exp, 0);
 		if (ret == 0)
 			break;
 		else if (ret != -EBUSY) {
···
 		int ret;
 
 		exp->tuple.dst.u.tcp.port = htons(nated_port);
-		ret = nf_ct_expect_related(exp);
+		ret = nf_ct_expect_related(exp, 0);
 		if (ret == 0)
 			break;
 		else if (ret != -EBUSY) {
···
 		int ret;
 
 		exp->tuple.dst.u.tcp.port = htons(nated_port);
-		ret = nf_ct_expect_related(exp);
+		ret = nf_ct_expect_related(exp, 0);
 		if (ret == 0)
 			break;
 		else if (ret != -EBUSY) {
···
 		int ret;
 
 		exp->tuple.dst.u.tcp.port = htons(nated_port);
-		ret = nf_ct_expect_related(exp);
+		ret = nf_ct_expect_related(exp, 0);
 		if (ret == 0)
 			break;
 		else if (ret != -EBUSY) {

net/ipv6/netfilter/ip6t_SYNPROXY.c

···
 			opts.options |= XT_SYNPROXY_OPT_ECN;
 
 		opts.options &= info->options;
+		opts.mss_encode = opts.mss;
+		opts.mss = info->mss;
 		if (opts.options & XT_SYNPROXY_OPT_TIMESTAMP)
 			synproxy_init_timestamp_cookie(info, &opts);
 		else

net/ipv6/netfilter/ip6t_rpfilter.c

···
 	if (rpfilter_addr_linklocal(&iph->saddr)) {
 		lookup_flags |= RT6_LOOKUP_F_IFACE;
 		fl6.flowi6_oif = dev->ifindex;
-	} else if ((flags & XT_RPFILTER_LOOSE) == 0)
+	/* Set flowi6_oif for vrf devices to lookup route in l3mdev domain. */
+	} else if (netif_is_l3_master(dev) || netif_is_l3_slave(dev) ||
+		  (flags & XT_RPFILTER_LOOSE) == 0)
 		fl6.flowi6_oif = dev->ifindex;
 
 	rt = (void *)ip6_route_lookup(net, &fl6, skb, lookup_flags);
···
 		goto out;
 	}
 
-	if (rt->rt6i_idev->dev == dev || (flags & XT_RPFILTER_LOOSE))
+	if (rt->rt6i_idev->dev == dev ||
+	    l3mdev_master_ifindex_rcu(rt->rt6i_idev->dev) == dev->ifindex ||
+	    (flags & XT_RPFILTER_LOOSE))
 		ret = true;
  out:
 	ip6_rt_put(rt);

net/netfilter/Kconfig

···
 	  of Network Address Translation on them.
 
 	  This is FTP support on Layer 3 independent connection tracking.
-	  Layer 3 independent connection tracking is experimental scheme
-	  which generalize ip_conntrack to support other layer 3 protocols.
 
 	  To compile it as a module, choose M here.  If unsure, say N.
 
···
 	help
 	  SIP is an application-layer control protocol that can establish,
 	  modify, and terminate multimedia sessions (conferences) such as
-	  Internet telephony calls. With the ip_conntrack_sip and
+	  Internet telephony calls. With the nf_conntrack_sip and
 	  the nf_nat_sip modules you can support the protocol on a connection
 	  tracking/NATing firewall.
 
···
 	depends on NETFILTER_ADVANCED
 	help
 	  Helper matching allows you to match packets in dynamic connections
-	  tracked by a conntrack-helper, ie. ip_conntrack_ftp
+	  tracked by a conntrack-helper, ie. nf_conntrack_ftp
 
 	  To compile it as a module, choose M here.  If unsure, say Y.
 

net/netfilter/ipvs/ip_vs_nfct.c

···
 
 	IP_VS_DBG_BUF(7, "%s: ct=%p, expect tuple=" FMT_TUPLE "\n",
 		      __func__, ct, ARG_TUPLE(&exp->tuple));
-	nf_ct_expect_related(exp);
+	nf_ct_expect_related(exp, 0);
 	nf_ct_expect_put(exp);
 }
 EXPORT_SYMBOL(ip_vs_nfct_expect_related);

net/netfilter/nf_conntrack_amanda.c

···
 		if (nf_nat_amanda && ct->status & IPS_NAT_MASK)
 			ret = nf_nat_amanda(skb, ctinfo, protoff,
 					    off - dataoff, len, exp);
-		else if (nf_ct_expect_related(exp) != 0) {
+		else if (nf_ct_expect_related(exp, 0) != 0) {
 			nf_ct_helper_log(skb, ct, "cannot add expectation");
 			ret = NF_DROP;
 		}

net/netfilter/nf_conntrack_broadcast.c

···
 	exp->class		  = NF_CT_EXPECT_CLASS_DEFAULT;
 	exp->helper               = NULL;
 
-	nf_ct_expect_related(exp);
+	nf_ct_expect_related(exp, 0);
 	nf_ct_expect_put(exp);
 
 	nf_ct_refresh(ct, skb, timeout * HZ);

net/netfilter/nf_conntrack_core.c

···
 #include <linux/netfilter/nfnetlink_conntrack.h>
 #include <linux/mutex.h>
 
-/* Generic function for tcp/udp/sctp/dccp and alike. This needs to be
- * in ip_conntrack_core, since we don't want the protocols to autoload
- * or depend on ctnetlink */
+/* Generic function for tcp/udp/sctp/dccp and alike. */
 int nf_ct_port_tuple_to_nlattr(struct sk_buff *skb,
 			       const struct nf_conntrack_tuple *tuple)
 {

net/netfilter/nf_conntrack_expect.c

···
 static inline int expect_matches(const struct nf_conntrack_expect *a,
 				 const struct nf_conntrack_expect *b)
 {
-	return a->master == b->master &&
-	       nf_ct_tuple_equal(&a->tuple, &b->tuple) &&
+	return nf_ct_tuple_equal(&a->tuple, &b->tuple) &&
 	       nf_ct_tuple_mask_equal(&a->mask, &b->mask) &&
 	       net_eq(nf_ct_net(a->master), nf_ct_net(b->master)) &&
 	       nf_ct_zone_equal_any(a->master, nf_ct_zone(b->master));
+}
+
+static bool master_matches(const struct nf_conntrack_expect *a,
+			   const struct nf_conntrack_expect *b,
+			   unsigned int flags)
+{
+	if (flags & NF_CT_EXP_F_SKIP_MASTER)
+		return true;
+
+	return a->master == b->master;
 }
 
 /* Generally a bad idea to call this: could have matched already. */
···
 		nf_ct_remove_expect(last);
 }
 
-static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect)
+static inline int __nf_ct_expect_check(struct nf_conntrack_expect *expect,
+				       unsigned int flags)
 {
 	const struct nf_conntrack_expect_policy *p;
 	struct nf_conntrack_expect *i;
···
 	}
 	h = nf_ct_expect_dst_hash(net, &expect->tuple);
 	hlist_for_each_entry_safe(i, next, &nf_ct_expect_hash[h], hnode) {
-		if (expect_matches(i, expect)) {
-			if (i->class != expect->class)
+		if (master_matches(i, expect, flags) &&
+		    expect_matches(i, expect)) {
+			if (i->class != expect->class ||
+			    i->master != expect->master)
 				return -EALREADY;
 
 			if (nf_ct_remove_expect(i))
···
 }
 
 int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
-				u32 portid, int report)
+				u32 portid, int report, unsigned int flags)
 {
 	int ret;
 
 	spin_lock_bh(&nf_conntrack_expect_lock);
-	ret = __nf_ct_expect_check(expect);
+	ret = __nf_ct_expect_check(expect, flags);
 	if (ret < 0)
 		goto out;
 

net/netfilter/nf_conntrack_ftp.c

···
 				 protoff, matchoff, matchlen, exp);
 	else {
 		/* Can't expect this?  Best to drop packet now. */
-		if (nf_ct_expect_related(exp) != 0) {
+		if (nf_ct_expect_related(exp, 0) != 0) {
 			nf_ct_helper_log(skb, ct, "cannot add expectation");
 			ret = NF_DROP;
 		} else

net/netfilter/nf_conntrack_h323_asn1.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * ip_conntrack_helper_h323_asn1.c - BER and PER decoding library for H.323
- * 			      	     conntrack/NAT module.
+ * BER and PER decoding library for H.323 conntrack/NAT module.
  *
  * Copyright (c) 2006 by Jing Min Zhao <[e-mail]>
  *
- * See ip_conntrack_helper_h323_asn1.h for details.
+ * See nf_conntrack_helper_h323_asn1.h for details.
  */
 
 #ifdef __KERNEL__

net/netfilter/nf_conntrack_h323_main.c

···
 		ret = nat_rtp_rtcp(skb, ct, ctinfo, protoff, data, dataoff,
 				   taddr, port, rtp_port, rtp_exp, rtcp_exp);
 	} else {		/* Conntrack only */
-		if (nf_ct_expect_related(rtp_exp) == 0) {
-			if (nf_ct_expect_related(rtcp_exp) == 0) {
+		if (nf_ct_expect_related(rtp_exp, 0) == 0) {
+			if (nf_ct_expect_related(rtcp_exp, 0) == 0) {
 				pr_debug("nf_ct_h323: expect RTP ");
 				nf_ct_dump_tuple(&rtp_exp->tuple);
 				pr_debug("nf_ct_h323: expect RTCP ");
···
 		ret = nat_t120(skb, ct, ctinfo, protoff, data, dataoff, taddr,
 			       port, exp);
 	} else {		/* Conntrack only */
-		if (nf_ct_expect_related(exp) == 0) {
+		if (nf_ct_expect_related(exp, 0) == 0) {
 			pr_debug("nf_ct_h323: expect T.120 ");
 			nf_ct_dump_tuple(&exp->tuple);
 		} else
···
 		ret = nat_h245(skb, ct, ctinfo, protoff, data, dataoff, taddr,
 			       port, exp);
 	} else {		/* Conntrack only */
-		if (nf_ct_expect_related(exp) == 0) {
+		if (nf_ct_expect_related(exp, 0) == 0) {
 			pr_debug("nf_ct_q931: expect H.245 ");
 			nf_ct_dump_tuple(&exp->tuple);
 		} else
···
 					 protoff, data, dataoff,
 					 taddr, port, exp);
 	} else {		/* Conntrack only */
-		if (nf_ct_expect_related(exp) == 0) {
+		if (nf_ct_expect_related(exp, 0) == 0) {
 			pr_debug("nf_ct_q931: expect Call Forwarding ");
 			nf_ct_dump_tuple(&exp->tuple);
 		} else
···
 		ret = nat_q931(skb, ct, ctinfo, protoff, data,
 			       taddr, i, port, exp);
 	} else {		/* Conntrack only */
-		if (nf_ct_expect_related(exp) == 0) {
+		if (nf_ct_expect_related(exp, 0) == 0) {
 			pr_debug("nf_ct_ras: expect Q.931 ");
 			nf_ct_dump_tuple(&exp->tuple);
 
···
 			  IPPROTO_UDP, NULL, &port);
 	exp->helper = nf_conntrack_helper_ras;
 
-	if (nf_ct_expect_related(exp) == 0) {
+	if (nf_ct_expect_related(exp, 0) == 0) {
 		pr_debug("nf_ct_ras: expect RAS ");
 		nf_ct_dump_tuple(&exp->tuple);
 	} else
···
 	exp->flags = NF_CT_EXPECT_PERMANENT;
 	exp->helper = nf_conntrack_helper_q931;
 
-	if (nf_ct_expect_related(exp) == 0) {
+	if (nf_ct_expect_related(exp, 0) == 0) {
 		pr_debug("nf_ct_ras: expect Q.931 ");
 		nf_ct_dump_tuple(&exp->tuple);
 	} else
···
 	exp->flags = NF_CT_EXPECT_PERMANENT;
 	exp->helper = nf_conntrack_helper_q931;
 
-	if (nf_ct_expect_related(exp) == 0) {
+	if (nf_ct_expect_related(exp, 0) == 0) {
 		pr_debug("nf_ct_ras: expect Q.931 ");
 		nf_ct_dump_tuple(&exp->tuple);
 	} else

net/netfilter/nf_conntrack_irc.c

···
 						 addr_beg_p - ib_ptr,
 						 addr_end_p - addr_beg_p,
 						 exp);
-			else if (nf_ct_expect_related(exp) != 0) {
+			else if (nf_ct_expect_related(exp, 0) != 0) {
 				nf_ct_helper_log(skb, ct,
 						 "cannot add expectation");
 				ret = NF_DROP;

net/netfilter/nf_conntrack_netlink.c

···
 	if (IS_ERR(exp))
 		return PTR_ERR(exp);
 
-	err = nf_ct_expect_related_report(exp, portid, report);
+	err = nf_ct_expect_related_report(exp, portid, report, 0);
 	nf_ct_expect_put(exp);
 	return err;
 }
···
 		goto err_rcu;
 	}
 
-	err = nf_ct_expect_related_report(exp, portid, report);
+	err = nf_ct_expect_related_report(exp, portid, report, 0);
 	nf_ct_expect_put(exp);
 err_rcu:
 	rcu_read_unlock();

net/netfilter/nf_conntrack_pptp.c

···
 	nf_nat_pptp_exp_gre = rcu_dereference(nf_nat_pptp_hook_exp_gre);
 	if (nf_nat_pptp_exp_gre && ct->status & IPS_NAT_MASK)
 		nf_nat_pptp_exp_gre(exp_orig, exp_reply);
-	if (nf_ct_expect_related(exp_orig) != 0)
+	if (nf_ct_expect_related(exp_orig, 0) != 0)
 		goto out_put_both;
-	if (nf_ct_expect_related(exp_reply) != 0)
+	if (nf_ct_expect_related(exp_reply, 0) != 0)
 		goto out_unexpect_orig;
 
 	/* Add GRE keymap entries */

net/netfilter/nf_conntrack_proto_gre.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * ip_conntrack_proto_gre.c - Version 3.0
- *
  * Connection tracking protocol helper module for GRE.
  *
  * GRE is a generic encapsulation protocol, which is generally not very

net/netfilter/nf_conntrack_proto_icmp.c

···
 		return -NF_ACCEPT;
 	}
 
-	/* See ip_conntrack_proto_tcp.c */
+	/* See nf_conntrack_proto_tcp.c */
 	if (state->net->ct.sysctl_checksum &&
 	    state->hook == NF_INET_PRE_ROUTING &&
 	    nf_ip_checksum(skb, state->hook, dataoff, IPPROTO_ICMP)) {

net/netfilter/nf_conntrack_proto_tcp.c

···
 	struct ip_ct_tcp_state *receiver = &state->seen[!dir];
 	const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple;
 	__u32 seq, ack, sack, end, win, swin;
+	u16 win_raw;
 	s32 receiver_offset;
 	bool res, in_recv_win;
 
···
 	 */
 	seq = ntohl(tcph->seq);
 	ack = sack = ntohl(tcph->ack_seq);
-	win = ntohs(tcph->window);
+	win_raw = ntohs(tcph->window);
+	win = win_raw;
 	end = segment_seq_plus_len(seq, skb->len, dataoff, tcph);
 
 	if (receiver->flags & IP_CT_TCP_FLAG_SACK_PERM)
···
 			    && state->last_seq == seq
 			    && state->last_ack == ack
 			    && state->last_end == end
-			    && state->last_win == win)
+			    && state->last_win == win_raw)
 				state->retrans++;
 			else {
 				state->last_dir = dir;
 				state->last_seq = seq;
 				state->last_ack = ack;
 				state->last_end = end;
-				state->last_win = win;
+				state->last_win = win_raw;
 				state->retrans = 0;
 			}
 		}

net/netfilter/nf_conntrack_sane.c

···
 	nf_ct_dump_tuple(&exp->tuple);
 
 	/* Can't expect this?  Best to drop packet now. */
-	if (nf_ct_expect_related(exp) != 0) {
+	if (nf_ct_expect_related(exp, 0) != 0) {
 		nf_ct_helper_log(skb, ct, "cannot add expectation");
 		ret = NF_DROP;
 	}

net/netfilter/nf_conntrack_sip.c

···
 		/* -EALREADY handling works around end-points that send
 		 * SDP messages with identical port but different media type,
 		 * we pretend expectation was set up.
+		 * It also works in the case that SDP messages are sent with
+		 * identical expect tuples but for different master conntracks.
 		 */
-		int errp = nf_ct_expect_related(rtp_exp);
+		int errp = nf_ct_expect_related(rtp_exp,
+						NF_CT_EXP_F_SKIP_MASTER);
 
 		if (errp == 0 || errp == -EALREADY) {
-			int errcp = nf_ct_expect_related(rtcp_exp);
+			int errcp = nf_ct_expect_related(rtcp_exp,
+						NF_CT_EXP_F_SKIP_MASTER);
 
 			if (errcp == 0 || errcp == -EALREADY)
 				ret = NF_ACCEPT;
···
 		ret = hooks->expect(skb, protoff, dataoff, dptr, datalen,
 				    exp, matchoff, matchlen);
 	else {
-		if (nf_ct_expect_related(exp) != 0) {
+		if (nf_ct_expect_related(exp, 0) != 0) {
 			nf_ct_helper_log(skb, ct, "cannot add expectation");
 			ret = NF_DROP;
 		} else

net/netfilter/nf_conntrack_tftp.c

···
 		nf_nat_tftp = rcu_dereference(nf_nat_tftp_hook);
 		if (nf_nat_tftp && ct->status & IPS_NAT_MASK)
 			ret = nf_nat_tftp(skb, ctinfo, exp);
-		else if (nf_ct_expect_related(exp) != 0) {
+		else if (nf_ct_expect_related(exp, 0) != 0) {
 			nf_ct_helper_log(skb, ct, "cannot add expectation");
 			ret = NF_DROP;
 		}

net/netfilter/nf_nat_amanda.c

···
 		int res;
 
 		exp->tuple.dst.u.tcp.port = htons(port);
-		res = nf_ct_expect_related(exp);
+		res = nf_ct_expect_related(exp, 0);
 		if (res == 0)
 			break;
 		else if (res != -EBUSY) {

net/netfilter/nf_nat_core.c

···
  * and NF_INET_LOCAL_OUT, we change the destination to map into the
  * range. It might not be possible to get a unique tuple, but we try.
  * At worst (or if we race), we will end up with a final duplicate in
- * __ip_conntrack_confirm and drop the packet. */
+ * __nf_conntrack_confirm and drop the packet. */
 static void
 get_unique_tuple(struct nf_conntrack_tuple *tuple,
 		 const struct nf_conntrack_tuple *orig_tuple,

net/netfilter/nf_nat_ftp.c

···
 		int ret;
 
 		exp->tuple.dst.u.tcp.port = htons(port);
-		ret = nf_ct_expect_related(exp);
+		ret = nf_ct_expect_related(exp, 0);
 		if (ret == 0)
 			break;
 		else if (ret != -EBUSY) {

net/netfilter/nf_nat_irc.c

···
 		int ret;
 
 		exp->tuple.dst.u.tcp.port = htons(port);
-		ret = nf_ct_expect_related(exp);
+		ret = nf_ct_expect_related(exp, 0);
 		if (ret == 0)
 			break;
 		else if (ret != -EBUSY) {

net/netfilter/nf_nat_sip.c

···
 		int ret;
 
 		exp->tuple.dst.u.udp.port = htons(port);
-		ret = nf_ct_expect_related(exp);
+		ret = nf_ct_expect_related(exp, NF_CT_EXP_F_SKIP_MASTER);
 		if (ret == 0)
 			break;
 		else if (ret != -EBUSY) {
···
 		int ret;
 
 		rtp_exp->tuple.dst.u.udp.port = htons(port);
-		ret = nf_ct_expect_related(rtp_exp);
+		ret = nf_ct_expect_related(rtp_exp,
+					   NF_CT_EXP_F_SKIP_MASTER);
 		if (ret == -EBUSY)
 			continue;
 		else if (ret < 0) {
···
 			break;
 		}
 		rtcp_exp->tuple.dst.u.udp.port = htons(port + 1);
-		ret = nf_ct_expect_related(rtcp_exp);
+		ret = nf_ct_expect_related(rtcp_exp,
+					   NF_CT_EXP_F_SKIP_MASTER);
 		if (ret == 0)
 			break;
 		else if (ret == -EBUSY) {

net/netfilter/nf_nat_tftp.c

···
 		= ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.udp.port;
 	exp->dir = IP_CT_DIR_REPLY;
 	exp->expectfn = nf_nat_follow_master;
-	if (nf_ct_expect_related(exp) != 0) {
+	if (nf_ct_expect_related(exp, 0) != 0) {
 		nf_ct_helper_log(skb, exp->master, "cannot add expectation");
 		return NF_DROP;
 	}

net/netfilter/nf_synproxy_core.c

···
 	struct iphdr *iph, *niph;
 	struct tcphdr *nth;
 	unsigned int tcp_hdr_size;
-	u16 mss = opts->mss;
+	u16 mss = opts->mss_encode;
 
 	iph = ip_hdr(skb);
 
···
 	state = &ct->proto.tcp;
 	switch (state->state) {
 	case TCP_CONNTRACK_CLOSE:
-		if (th->rst && !test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
+		if (th->rst && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) {
 			nf_ct_seqadj_init(ct, ctinfo, synproxy->isn -
 						      ntohl(th->seq) + 1);
 			break;
···
 	struct ipv6hdr *iph, *niph;
 	struct tcphdr *nth;
 	unsigned int tcp_hdr_size;
-	u16 mss = opts->mss;
+	u16 mss = opts->mss_encode;
 
 	iph = ipv6_hdr(skb);
 
···
 	state = &ct->proto.tcp;
 	switch (state->state) {
 	case TCP_CONNTRACK_CLOSE:
-		if (th->rst && !test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
+		if (th->rst && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) {
 			nf_ct_seqadj_init(ct, ctinfo, synproxy->isn -
 						      ntohl(th->seq) + 1);
 			break;

net/netfilter/nf_tables_api.c

···
 
 	if (nla[NFTA_CHAIN_FLAGS])
 		flags = ntohl(nla_get_be32(nla[NFTA_CHAIN_FLAGS]));
+	else if (chain)
+		flags = chain->flags;
 
 	nft_ctx_init(&ctx, net, skb, nlh, family, table, chain, nla);
 

net/netfilter/nfnetlink.c

···
 	ss = nfnetlink_get_subsys(type << 8);
 	rcu_read_unlock();
 	if (!ss)
-		request_module("nfnetlink-subsys-%d", type);
+		request_module_nowait("nfnetlink-subsys-%d", type);
 	return 0;
 }
 #endif

net/netfilter/nft_chain_filter.c

···
 static inline void nft_chain_filter_inet_fini(void) {}
 #endif /* CONFIG_NF_TABLES_IPV6 */
 
-#ifdef CONFIG_NF_TABLES_BRIDGE
+#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE)
 static unsigned int
 nft_do_chain_bridge(void *priv,
 		    struct sk_buff *skb,

net/netfilter/nft_chain_nat.c

···
 #ifdef CONFIG_NF_TABLES_IPV6
 MODULE_ALIAS_NFT_CHAIN(AF_INET6, "nat");
 #endif
+#ifdef CONFIG_NF_TABLES_INET
+MODULE_ALIAS_NFT_CHAIN(1, "nat");	/* NFPROTO_INET */
+#endif

net/netfilter/nft_ct.c

···
 		          priv->l4proto, NULL, &priv->dport);
 	exp->timeout.expires = jiffies + priv->timeout * HZ;
 
-	if (nf_ct_expect_related(exp) != 0)
+	if (nf_ct_expect_related(exp, 0) != 0)
 		regs->verdict.code = NF_DROP;
 }
 

net/netfilter/nft_hash.c

···
 	priv->dreg = nft_parse_register(tb[NFTA_HASH_DREG]);
 
 	priv->modulus = ntohl(nla_get_be32(tb[NFTA_HASH_MODULUS]));
-	if (priv->modulus <= 1)
+	if (priv->modulus < 1)
 		return -ERANGE;
 
 	if (priv->offset + priv->modulus - 1 < priv->offset)

net/netfilter/nft_meta.c

···
 	if (tb[NFTA_META_DREG] && tb[NFTA_META_SREG])
 		return ERR_PTR(-EINVAL);
 
-#ifdef CONFIG_NF_TABLES_BRIDGE
+#if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE) && IS_MODULE(CONFIG_NFT_BRIDGE_META)
 	if (ctx->family == NFPROTO_BRIDGE)
 		return ERR_PTR(-EAGAIN);
 #endif

net/netfilter/nft_redir.c

···
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Arturo Borrero Gonzalez <[e-mail]>");
-MODULE_ALIAS_NFT_EXPR("nat");
+MODULE_ALIAS_NFT_EXPR("redir");

net/netfilter/nft_synproxy.c

···
 		opts->options |= NF_SYNPROXY_OPT_ECN;
 
 	opts->options &= priv->info.options;
+	opts->mss_encode = opts->mss;
+	opts->mss = info->mss;
 	if (opts->options & NF_SYNPROXY_OPT_TIMESTAMP)
 		synproxy_init_timestamp_cookie(info, opts);
 	else