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

Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

The following patchset contains Netfilter/IPVS updates for your net-next
tree. This batch comes with more input sanitization for xtables to
address bug reports from fuzzers, preparation works to the flowtable
infrastructure and assorted updates. In no particular order, they are:

1) Make sure userspace provides a valid standard target verdict, from
   Florian Westphal.

2) Sanitize error target size, also from Florian.

3) Validate that last rule in basechain matches underflow/policy since
   userspace assumes this when decoding the ruleset blob that comes
   from the kernel, from Florian.

4) Consolidate hook entry checks through xt_check_table_hooks(),
   patch from Florian.

5) Cap ruleset allocations at 512 mbytes, 134217728 rules and reject
   very large compat offset arrays, so we have a reasonable upper limit
   and fuzzers don't exercise the oom-killer. Patches from Florian.

6) Several WARN_ON checks on xtables mutex helper, from Florian.

7) xt_rateest now has a hashtable per net, from Cong Wang.

8) Consolidate counter allocation in xt_counters_alloc(), from Florian.

9) Earlier xt_table_unlock() call in {ip,ip6,arp,eb}tables, patch
   from Xin Long.

10) Set FLOW_OFFLOAD_DIR_* to IP_CT_DIR_* definitions, patch from
    Felix Fietkau.

11) Consolidate code through flow_offload_fill_dir(), also from Felix.

12) Inline ip6_dst_mtu_forward() just like ip_dst_mtu_maybe_forward()
    to remove a dependency with flowtable and ipv6.ko, from Felix.

13) Cache mtu size in flow_offload_tuple object, this is safe for
    forwarding as f87c10a8aa1e describes, from Felix.

14) Rename nf_flow_table.c to nf_flow_table_core.o, to simplify too
    modular infrastructure, from Felix.

15) Add rt0, rt2 and rt4 IPv6 routing extension support, patch from
    Ahmed Abdelsalam.

16) Remove unused parameter in nf_conncount_count(), from Yi-Hung Wei.

17) Support for counting only to nf_conncount infrastructure, patch
    from Yi-Hung Wei.

18) Add strict NFT_CT_{SRC_IP,DST_IP,SRC_IP6,DST_IP6} key datatypes
    to nft_ct.

19) Use boolean as return value from ipt_ah and from IPVS too, patch
    from Gustavo A. R. Silva.

20) Remove useless parameters in nfnl_acct_overquota() and
    nf_conntrack_broadcast_help(), from Taehee Yoo.

21) Use ipv6_addr_is_multicast() from xt_cluster, also from Taehee Yoo.

22) Statify nf_tables_obj_lookup_byhandle, patch from Fengguang Wu.

23) Fix typo in xt_limit, from Geert Uytterhoeven.

24) Do no use VLAs in Netfilter code, again from Gustavo.

25) Use ADD_COUNTER from ebtables, from Taehee Yoo.

26) Bitshift support for CONNMARK and MARK targets, from Jack Ma.

27) Use pr_*() and add pr_fmt(), from Arushi Singhal.

28) Add synproxy support to ctnetlink.

29) ICMP type and IGMP matching support for ebtables, patches from
    Matthias Schiffer.

30) Support for the revision infrastructure to ebtables, from
    Bernie Harris.

31) String match support for ebtables, also from Bernie.

32) Documentation for the new flowtable infrastructure.

33) Use generic comparison functions in ebt_stp, from Joe Perches.

34) Demodularize filter chains in nftables.

35) Register conntrack hooks in case nftables NAT chain is added.

36) Merge assignments with return in a couple of spots in the
    Netfilter codebase, also from Arushi.

37) Document that xtables percpu counters are stored in the same
    memory area, from Ben Hutchings.

38) Revert mark_source_chains() sanity checks that break existing
    rulesets, from Florian Westphal.

39) Use is_zero_ether_addr() in the ipset codebase, from Joe Perches.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 86 insertions, 6 deletions

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index dd177ebee9aabc..4c1d0c5bc26800 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -440,6 +440,31 @@ err:
 	return -1;
 }
 
+static int ctnetlink_dump_ct_synproxy(struct sk_buff *skb, struct nf_conn *ct)
+{
+	struct nf_conn_synproxy *synproxy = nfct_synproxy(ct);
+	struct nlattr *nest_parms;
+
+	if (!synproxy)
+		return 0;
+
+	nest_parms = nla_nest_start(skb, CTA_SYNPROXY | NLA_F_NESTED);
+	if (!nest_parms)
+		goto nla_put_failure;
+
+	if (nla_put_be32(skb, CTA_SYNPROXY_ISN, htonl(synproxy->isn)) ||
+	    nla_put_be32(skb, CTA_SYNPROXY_ITS, htonl(synproxy->its)) ||
+	    nla_put_be32(skb, CTA_SYNPROXY_TSOFF, htonl(synproxy->tsoff)))
+		goto nla_put_failure;
+
+	nla_nest_end(skb, nest_parms);
+
+	return 0;
+
+nla_put_failure:
+	return -1;
+}
+
 static int ctnetlink_dump_id(struct sk_buff *skb, const struct nf_conn *ct)
 {
 	if (nla_put_be32(skb, CTA_ID, htonl((unsigned long)ct)))
@@ -518,7 +543,8 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
 	    ctnetlink_dump_id(skb, ct) < 0 ||
 	    ctnetlink_dump_use(skb, ct) < 0 ||
 	    ctnetlink_dump_master(skb, ct) < 0 ||
-	    ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
+	    ctnetlink_dump_ct_seq_adj(skb, ct) < 0 ||
+	    ctnetlink_dump_ct_synproxy(skb, ct) < 0)
 		goto nla_put_failure;
 
 	nlmsg_end(skb, nlh);
@@ -730,6 +756,10 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
 		if (events & (1 << IPCT_SEQADJ) &&
 		    ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
 			goto nla_put_failure;
+
+		if (events & (1 << IPCT_SYNPROXY) &&
+		    ctnetlink_dump_ct_synproxy(skb, ct) < 0)
+			goto nla_put_failure;
 	}
 
 #ifdef CONFIG_NF_CONNTRACK_MARK
@@ -1497,9 +1527,8 @@ ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
 	if (ret < 0)
 		return ret;
 
-	ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
-					cda[CTA_NAT_SRC]);
-	return ret;
+	return ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
+					 cda[CTA_NAT_SRC]);
 #else
 	if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
 		return 0;
@@ -1689,6 +1718,39 @@ err:
 	return ret;
 }
 
+static const struct nla_policy synproxy_policy[CTA_SYNPROXY_MAX + 1] = {
+	[CTA_SYNPROXY_ISN]	= { .type = NLA_U32 },
+	[CTA_SYNPROXY_ITS]	= { .type = NLA_U32 },
+	[CTA_SYNPROXY_TSOFF]	= { .type = NLA_U32 },
+};
+
+static int ctnetlink_change_synproxy(struct nf_conn *ct,
+				     const struct nlattr * const cda[])
+{
+	struct nf_conn_synproxy *synproxy = nfct_synproxy(ct);
+	struct nlattr *tb[CTA_SYNPROXY_MAX + 1];
+	int err;
+
+	if (!synproxy)
+		return 0;
+
+	err = nla_parse_nested(tb, CTA_SYNPROXY_MAX, cda[CTA_SYNPROXY],
+			       synproxy_policy, NULL);
+	if (err < 0)
+		return err;
+
+	if (!tb[CTA_SYNPROXY_ISN] ||
+	    !tb[CTA_SYNPROXY_ITS] ||
+	    !tb[CTA_SYNPROXY_TSOFF])
+		return -EINVAL;
+
+	synproxy->isn = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ISN]));
+	synproxy->its = ntohl(nla_get_be32(tb[CTA_SYNPROXY_ITS]));
+	synproxy->tsoff = ntohl(nla_get_be32(tb[CTA_SYNPROXY_TSOFF]));
+
+	return 0;
+}
+
 static int
 ctnetlink_attach_labels(struct nf_conn *ct, const struct nlattr * const cda[])
 {
@@ -1759,6 +1821,12 @@ ctnetlink_change_conntrack(struct nf_conn *ct,
 			return err;
 	}
 
+	if (cda[CTA_SYNPROXY]) {
+		err = ctnetlink_change_synproxy(ct, cda);
+		if (err < 0)
+			return err;
+	}
+
 	if (cda[CTA_LABELS]) {
 		err = ctnetlink_attach_labels(ct, cda);
 		if (err < 0)
@@ -1880,6 +1948,12 @@ ctnetlink_create_conntrack(struct net *net,
 			goto err2;
 	}
 
+	if (cda[CTA_SYNPROXY]) {
+		err = ctnetlink_change_synproxy(ct, cda);
+		if (err < 0)
+			goto err2;
+	}
+
 #if defined(CONFIG_NF_CONNTRACK_MARK)
 	if (cda[CTA_MARK])
 		ct->mark = ntohl(nla_get_be32(cda[CTA_MARK]));
@@ -1991,7 +2065,9 @@ static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl,
 						      (1 << IPCT_HELPER) |
 						      (1 << IPCT_PROTOINFO) |
 						      (1 << IPCT_SEQADJ) |
-						      (1 << IPCT_MARK) | events,
+						      (1 << IPCT_MARK) |
+						      (1 << IPCT_SYNPROXY) |
+						      events,
 						      ct, NETLINK_CB(skb).portid,
 						      nlmsg_report(nlh));
 			nf_ct_put(ct);
@@ -2012,7 +2088,8 @@ static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl,
 						      (1 << IPCT_LABEL) |
 						      (1 << IPCT_PROTOINFO) |
 						      (1 << IPCT_SEQADJ) |
-						      (1 << IPCT_MARK),
+						      (1 << IPCT_MARK) |
+						      (1 << IPCT_SYNPROXY),
 						      ct, NETLINK_CB(skb).portid,
 						      nlmsg_report(nlh));
 		}
@@ -2282,6 +2359,9 @@ static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct)
 	    ctnetlink_dump_ct_seq_adj(skb, ct) < 0)
 		goto nla_put_failure;
 
+	if (ctnetlink_dump_ct_synproxy(skb, ct) < 0)
+		goto nla_put_failure;
+
 #ifdef CONFIG_NF_CONNTRACK_MARK
 	if (ct->mark && ctnetlink_dump_mark(skb, ct) < 0)
 		goto nla_put_failure;