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) nf_conntrack_tuple_taken() needs to recheck zone for
   NAT clash resolution, from Florian Westphal.

2) Restore support for stateful expressions when set definition
   specifies no stateful expressions.
====================

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

net/netfilter/nf_conntrack_core.c

@@ -1229,7 +1229,8 @@ nf_conntrack_tuple_taken(const struct nf_conntrack_tuple *tuple,
 			 * Let nf_ct_resolve_clash() deal with this later.
 			 */
 			if (nf_ct_tuple_equal(&ignored_conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
-					      &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple))
+					      &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple) &&
+					      nf_ct_zone_equal(ct, zone, IP_CT_DIR_ORIGINAL))
 				continue;
 
 			NF_CT_STAT_INC_ATOMIC(net, found);

net/netfilter/nf_tables_api.c

@@ -5281,6 +5281,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 	struct nft_expr *expr_array[NFT_SET_EXPR_MAX] = {};
 	struct nlattr *nla[NFTA_SET_ELEM_MAX + 1];
 	u8 genmask = nft_genmask_next(ctx->net);
+	u32 flags = 0, size = 0, num_exprs = 0;
 	struct nft_set_ext_tmpl tmpl;
 	struct nft_set_ext *ext, *ext2;
 	struct nft_set_elem elem;
@@ -5290,7 +5291,6 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 	struct nft_data_desc desc;
 	enum nft_registers dreg;
 	struct nft_trans *trans;
-	u32 flags = 0, size = 0;
 	u64 timeout;
 	u64 expiration;
 	int err, i;
@@ -5356,7 +5356,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 	if (nla[NFTA_SET_ELEM_EXPR]) {
 		struct nft_expr *expr;
 
-		if (set->num_exprs != 1)
+		if (set->num_exprs && set->num_exprs != 1)
 			return -EOPNOTSUPP;
 
 		expr = nft_set_elem_expr_alloc(ctx, set,
@@ -5365,8 +5365,9 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 			return PTR_ERR(expr);
 
 		expr_array[0] = expr;
+		num_exprs = 1;
 
-		if (set->exprs[0] && set->exprs[0]->ops != expr->ops) {
+		if (set->num_exprs && set->exprs[0]->ops != expr->ops) {
 			err = -EOPNOTSUPP;
 			goto err_set_elem_expr;
 		}
@@ -5375,12 +5376,10 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 		struct nlattr *tmp;
 		int left;
 
-		if (set->num_exprs == 0)
-			return -EOPNOTSUPP;
-
 		i = 0;
 		nla_for_each_nested(tmp, nla[NFTA_SET_ELEM_EXPRESSIONS], left) {
-			if (i == set->num_exprs) {
+			if (i == NFT_SET_EXPR_MAX ||
+			    (set->num_exprs && set->num_exprs == i)) {
 				err = -E2BIG;
 				goto err_set_elem_expr;
 			}
@@ -5394,21 +5393,24 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 				goto err_set_elem_expr;
 			}
 			expr_array[i] = expr;
+			num_exprs++;
 
-			if (expr->ops != set->exprs[i]->ops) {
+			if (set->num_exprs && expr->ops != set->exprs[i]->ops) {
 				err = -EOPNOTSUPP;
 				goto err_set_elem_expr;
 			}
 			i++;
 		}
-		if (set->num_exprs != i) {
+		if (set->num_exprs && set->num_exprs != i) {
 			err = -EOPNOTSUPP;
 			goto err_set_elem_expr;
 		}
 	} else if (set->num_exprs > 0) {
 		err = nft_set_elem_expr_clone(ctx, set, expr_array);
 		if (err < 0)
 			goto err_set_elem_expr_clone;
+
+		num_exprs = set->num_exprs;
 	}
 
 	err = nft_setelem_parse_key(ctx, set, &elem.key.val,
@@ -5433,8 +5435,8 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 			nft_set_ext_add(&tmpl, NFT_SET_EXT_TIMEOUT);
 	}
 
-	if (set->num_exprs) {
-		for (i = 0; i < set->num_exprs; i++)
+	if (num_exprs) {
+		for (i = 0; i < num_exprs; i++)
 			size += expr_array[i]->ops->size;
 
 		nft_set_ext_add_length(&tmpl, NFT_SET_EXT_EXPRESSIONS,
@@ -5522,7 +5524,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 		*nft_set_ext_obj(ext) = obj;
 		obj->use++;
 	}
-	for (i = 0; i < set->num_exprs; i++)
+	for (i = 0; i < num_exprs; i++)
 		nft_set_elem_expr_setup(ext, i, expr_array);
 
 	trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set);
@@ -5584,7 +5586,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 err_parse_key:
 	nft_data_release(&elem.key.val, NFT_DATA_VALUE);
 err_set_elem_expr:
-	for (i = 0; i < set->num_exprs && expr_array[i]; i++)
+	for (i = 0; i < num_exprs && expr_array[i]; i++)
 		nft_expr_destroy(ctx, expr_array[i]);
 err_set_elem_expr_clone:
 	return err;