Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Conflicts:
	net/netfilter/core.c
	net/netfilter/nf_tables_netdev.c

Resolve two conflicts before pull request for David's net-next tree:

1) Between c73c24849011 ("netfilter: nf_tables_netdev: remove redundant
   ip_hdr assignment") from the net tree and commit ddc8b6027ad0
   ("netfilter: introduce nft_set_pktinfo_{ipv4, ipv6}_validate()").

2) Between e8bffe0cf964 ("net: Add _nf_(un)register_hooks symbols") and
   Aaron Conole's patches to replace list_head with single linked list.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

10 files changed, 120 insertions, 41 deletions

diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index 72fc514ec676..fa6715db4581 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -231,19 +231,17 @@ EXPORT_SYMBOL(nf_unregister_net_hooks);
 
 static LIST_HEAD(nf_hook_list);
 
-int nf_register_hook(struct nf_hook_ops *reg)
+static int _nf_register_hook(struct nf_hook_ops *reg)
 {
 	struct net *net, *last;
 	int ret;
 
-	rtnl_lock();
 	for_each_net(net) {
 		ret = nf_register_net_hook(net, reg);
 		if (ret && ret != -ENOENT)
 			goto rollback;
 	}
 	list_add_tail(&reg->list, &nf_hook_list);
-	rtnl_unlock();
 
 	return 0;
 rollback:
@@ -253,19 +251,34 @@ rollback:
 			break;
 		nf_unregister_net_hook(net, reg);
 	}
+	return ret;
+}
+
+int nf_register_hook(struct nf_hook_ops *reg)
+{
+	int ret;
+
+	rtnl_lock();
+	ret = _nf_register_hook(reg);
 	rtnl_unlock();
+
 	return ret;
 }
 EXPORT_SYMBOL(nf_register_hook);
 
-void nf_unregister_hook(struct nf_hook_ops *reg)
+static void _nf_unregister_hook(struct nf_hook_ops *reg)
 {
 	struct net *net;
 
-	rtnl_lock();
 	list_del(&reg->list);
 	for_each_net(net)
 		nf_unregister_net_hook(net, reg);
+}
+
+void nf_unregister_hook(struct nf_hook_ops *reg)
+{
+	rtnl_lock();
+	_nf_unregister_hook(reg);
 	rtnl_unlock();
 }
 EXPORT_SYMBOL(nf_unregister_hook);
@@ -289,6 +302,26 @@ err:
 }
 EXPORT_SYMBOL(nf_register_hooks);
 
+/* Caller MUST take rtnl_lock() */
+int _nf_register_hooks(struct nf_hook_ops *reg, unsigned int n)
+{
+	unsigned int i;
+	int err = 0;
+
+	for (i = 0; i < n; i++) {
+		err = _nf_register_hook(&reg[i]);
+		if (err)
+			goto err;
+	}
+	return err;
+
+err:
+	if (i > 0)
+		_nf_unregister_hooks(reg, i);
+	return err;
+}
+EXPORT_SYMBOL(_nf_register_hooks);
+
 void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n)
 {
 	while (n-- > 0)
@@ -296,6 +329,14 @@ void nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n)
 }
 EXPORT_SYMBOL(nf_unregister_hooks);
 
+/* Caller MUST take rtnl_lock */
+void _nf_unregister_hooks(struct nf_hook_ops *reg, unsigned int n)
+{
+	while (n-- > 0)
+		_nf_unregister_hook(&reg[n]);
+}
+EXPORT_SYMBOL(_nf_unregister_hooks);
+
 unsigned int nf_iterate(struct sk_buff *skb,
 			struct nf_hook_state *state,
 			struct nf_hook_entry **entryp)
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index c94ec197845c..ba6a1d421222 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1108,9 +1108,9 @@ init_conntrack(struct net *net, struct nf_conn *tmpl,
 	if (IS_ERR(ct))
 		return (struct nf_conntrack_tuple_hash *)ct;
 
-	if (tmpl && nfct_synproxy(tmpl)) {
-		nfct_seqadj_ext_add(ct);
-		nfct_synproxy_ext_add(ct);
+	if (!nf_ct_add_synproxy(ct, tmpl)) {
+		nf_conntrack_free(ct);
+		return ERR_PTR(-ENOMEM);
 	}
 
 	timeout_ext = tmpl ? nf_ct_timeout_find(tmpl) : NULL;
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index 81ae41f85d3a..bbb8f3df79f7 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -441,7 +441,8 @@ nf_nat_setup_info(struct nf_conn *ct,
 			ct->status |= IPS_DST_NAT;
 
 		if (nfct_help(ct))
-			nfct_seqadj_ext_add(ct);
+			if (!nfct_seqadj_ext_add(ct))
+				return NF_DROP;
 	}
 
 	if (maniptype == NF_NAT_MANIP_SRC) {
@@ -801,7 +802,7 @@ nfnetlink_parse_nat_setup(struct nf_conn *ct,
 	if (err < 0)
 		return err;
 
-	return nf_nat_setup_info(ct, &range, manip);
+	return nf_nat_setup_info(ct, &range, manip) == NF_DROP ? -ENOMEM : 0;
 }
 #else
 static int
diff --git a/net/netfilter/nf_tables_trace.c b/net/netfilter/nf_tables_trace.c
index 696fe8f6f2f2..ab695f8e2d29 100644
--- a/net/netfilter/nf_tables_trace.c
+++ b/net/netfilter/nf_tables_trace.c
@@ -239,7 +239,7 @@ void nft_trace_notify(struct nft_traceinfo *info)
 		break;
 	case NFT_TRACETYPE_POLICY:
 		if (nla_put_be32(skb, NFTA_TRACE_POLICY,
-				 info->basechain->policy))
+				 htonl(info->basechain->policy)))
 			goto nla_put_failure;
 		break;
 	}
diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c
index 70eb2f6a3b01..d44d89b56127 100644
--- a/net/netfilter/nfnetlink_acct.c
+++ b/net/netfilter/nfnetlink_acct.c
@@ -343,12 +343,12 @@ static int nfnl_acct_del(struct net *net, struct sock *nfnl,
 			 struct sk_buff *skb, const struct nlmsghdr *nlh,
 			 const struct nlattr * const tb[])
 {
-	char *acct_name;
-	struct nf_acct *cur;
+	struct nf_acct *cur, *tmp;
 	int ret = -ENOENT;
+	char *acct_name;
 
 	if (!tb[NFACCT_NAME]) {
-		list_for_each_entry(cur, &net->nfnl_acct_list, head)
+		list_for_each_entry_safe(cur, tmp, &net->nfnl_acct_list, head)
 			nfnl_acct_try_del(cur);
 
 		return 0;
diff --git a/net/netfilter/nfnetlink_cttimeout.c b/net/netfilter/nfnetlink_cttimeout.c
index 68216cdc7083..139e0867e56e 100644
--- a/net/netfilter/nfnetlink_cttimeout.c
+++ b/net/netfilter/nfnetlink_cttimeout.c
@@ -98,31 +98,28 @@ static int cttimeout_new_timeout(struct net *net, struct sock *ctnl,
 		break;
 	}
 
-	l4proto = nf_ct_l4proto_find_get(l3num, l4num);
-
-	/* This protocol is not supportted, skip. */
-	if (l4proto->l4proto != l4num) {
-		ret = -EOPNOTSUPP;
-		goto err_proto_put;
-	}
-
 	if (matching) {
 		if (nlh->nlmsg_flags & NLM_F_REPLACE) {
 			/* You cannot replace one timeout policy by another of
 			 * different kind, sorry.
 			 */
 			if (matching->l3num != l3num ||
-			    matching->l4proto->l4proto != l4num) {
-				ret = -EINVAL;
-				goto err_proto_put;
-			}
-
-			ret = ctnl_timeout_parse_policy(&matching->data,
-							l4proto, net,
-							cda[CTA_TIMEOUT_DATA]);
-			return ret;
+			    matching->l4proto->l4proto != l4num)
+				return -EINVAL;
+
+			return ctnl_timeout_parse_policy(&matching->data,
+							 matching->l4proto, net,
+							 cda[CTA_TIMEOUT_DATA]);
 		}
-		ret = -EBUSY;
+
+		return -EBUSY;
+	}
+
+	l4proto = nf_ct_l4proto_find_get(l3num, l4num);
+
+	/* This protocol is not supportted, skip. */
+	if (l4proto->l4proto != l4num) {
+		ret = -EOPNOTSUPP;
 		goto err_proto_put;
 	}
 
@@ -305,7 +302,16 @@ static void ctnl_untimeout(struct net *net, struct ctnl_timeout *timeout)
 	const struct hlist_nulls_node *nn;
 	unsigned int last_hsize;
 	spinlock_t *lock;
-	int i;
+	int i, cpu;
+
+	for_each_possible_cpu(cpu) {
+		struct ct_pcpu *pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
+
+		spin_lock_bh(&pcpu->lock);
+		hlist_nulls_for_each_entry(h, nn, &pcpu->unconfirmed, hnnode)
+			untimeout(h, timeout);
+		spin_unlock_bh(&pcpu->lock);
+	}
 
 	local_bh_disable();
 restart:
@@ -350,12 +356,13 @@ static int cttimeout_del_timeout(struct net *net, struct sock *ctnl,
 				 const struct nlmsghdr *nlh,
 				 const struct nlattr * const cda[])
 {
-	struct ctnl_timeout *cur;
+	struct ctnl_timeout *cur, *tmp;
 	int ret = -ENOENT;
 	char *name;
 
 	if (!cda[CTA_TIMEOUT_NAME]) {
-		list_for_each_entry(cur, &net->nfct_timeout_list, head)
+		list_for_each_entry_safe(cur, tmp, &net->nfct_timeout_list,
+					 head)
 			ctnl_timeout_try_del(net, cur);
 
 		return 0;
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index 14264edf2d77..6c1e0246706e 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -293,10 +293,16 @@ int nft_meta_get_init(const struct nft_ctx *ctx,
 }
 EXPORT_SYMBOL_GPL(nft_meta_get_init);
 
-static int nft_meta_set_init_pkttype(const struct nft_ctx *ctx)
+int nft_meta_set_validate(const struct nft_ctx *ctx,
+			  const struct nft_expr *expr,
+			  const struct nft_data **data)
 {
+	struct nft_meta *priv = nft_expr_priv(expr);
 	unsigned int hooks;
 
+	if (priv->key != NFT_META_PKTTYPE)
+		return 0;
+
 	switch (ctx->afi->family) {
 	case NFPROTO_BRIDGE:
 		hooks = 1 << NF_BR_PRE_ROUTING;
@@ -310,6 +316,7 @@ static int nft_meta_set_init_pkttype(const struct nft_ctx *ctx)
 
 	return nft_chain_validate_hooks(ctx->chain, hooks);
 }
+EXPORT_SYMBOL_GPL(nft_meta_set_validate);
 
 int nft_meta_set_init(const struct nft_ctx *ctx,
 		      const struct nft_expr *expr,
@@ -329,15 +336,16 @@ int nft_meta_set_init(const struct nft_ctx *ctx,
 		len = sizeof(u8);
 		break;
 	case NFT_META_PKTTYPE:
-		err = nft_meta_set_init_pkttype(ctx);
-		if (err)
-			return err;
 		len = sizeof(u8);
 		break;
 	default:
 		return -EOPNOTSUPP;
 	}
 
+	err = nft_meta_set_validate(ctx, expr, NULL);
+	if (err < 0)
+		return err;
+
 	priv->sreg = nft_parse_register(tb[NFTA_META_SREG]);
 	err = nft_validate_register_load(priv->sreg, len);
 	if (err < 0)
@@ -409,6 +417,7 @@ static const struct nft_expr_ops nft_meta_set_ops = {
 	.init		= nft_meta_set_init,
 	.destroy	= nft_meta_set_destroy,
 	.dump		= nft_meta_set_dump,
+	.validate	= nft_meta_set_validate,
 };
 
 static const struct nft_expr_ops *
diff --git a/net/netfilter/nft_reject.c b/net/netfilter/nft_reject.c
index 0522fc9bfb0a..c64de3f7379d 100644
--- a/net/netfilter/nft_reject.c
+++ b/net/netfilter/nft_reject.c
@@ -26,11 +26,27 @@ const struct nla_policy nft_reject_policy[NFTA_REJECT_MAX + 1] = {
 };
 EXPORT_SYMBOL_GPL(nft_reject_policy);
 
+int nft_reject_validate(const struct nft_ctx *ctx,
+			const struct nft_expr *expr,
+			const struct nft_data **data)
+{
+	return nft_chain_validate_hooks(ctx->chain,
+					(1 << NF_INET_LOCAL_IN) |
+					(1 << NF_INET_FORWARD) |
+					(1 << NF_INET_LOCAL_OUT));
+}
+EXPORT_SYMBOL_GPL(nft_reject_validate);
+
 int nft_reject_init(const struct nft_ctx *ctx,
 		    const struct nft_expr *expr,
 		    const struct nlattr * const tb[])
 {
 	struct nft_reject *priv = nft_expr_priv(expr);
+	int err;
+
+	err = nft_reject_validate(ctx, expr, NULL);
+	if (err < 0)
+		return err;
 
 	if (tb[NFTA_REJECT_TYPE] == NULL)
 		return -EINVAL;
diff --git a/net/netfilter/nft_reject_inet.c b/net/netfilter/nft_reject_inet.c
index 759ca5248a3d..e79d9ca2ffee 100644
--- a/net/netfilter/nft_reject_inet.c
+++ b/net/netfilter/nft_reject_inet.c
@@ -66,7 +66,11 @@ static int nft_reject_inet_init(const struct nft_ctx *ctx,
 				const struct nlattr * const tb[])
 {
 	struct nft_reject *priv = nft_expr_priv(expr);
-	int icmp_code;
+	int icmp_code, err;
+
+	err = nft_reject_validate(ctx, expr, NULL);
+	if (err < 0)
+		return err;
 
 	if (tb[NFTA_REJECT_TYPE] == NULL)
 		return -EINVAL;
@@ -124,6 +128,7 @@ static const struct nft_expr_ops nft_reject_inet_ops = {
 	.eval		= nft_reject_inet_eval,
 	.init		= nft_reject_inet_init,
 	.dump		= nft_reject_inet_dump,
+	.validate	= nft_reject_validate,
 };
 
 static struct nft_expr_type nft_reject_inet_type __read_mostly = {
diff --git a/net/netfilter/xt_sctp.c b/net/netfilter/xt_sctp.c
index ef36a56a02c6..4dedb96d1a06 100644
--- a/net/netfilter/xt_sctp.c
+++ b/net/netfilter/xt_sctp.c
@@ -68,7 +68,7 @@ match_packet(const struct sk_buff *skb,
 			 ++i, offset, sch->type, htons(sch->length),
 			 sch->flags);
 #endif
-		offset += WORD_ROUND(ntohs(sch->length));
+		offset += SCTP_PAD4(ntohs(sch->length));
 
 		pr_debug("skb->len: %d\toffset: %d\n", skb->len, offset);