netfilter: nf_tables: honor NFT_SET_OBJECT in set backend selection

Check for NFT_SET_OBJECT feature flag, otherwise we may end up selecting
the wrong set backend.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_tables_api.c

@@ -2424,7 +2424,8 @@ nft_select_set_ops(const struct nlattr * const nla[],
 	features = 0;
 	if (nla[NFTA_SET_FLAGS] != NULL) {
 		features = ntohl(nla_get_be32(nla[NFTA_SET_FLAGS]));
-		features &= NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_TIMEOUT;
+		features &= NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_TIMEOUT |
+			    NFT_SET_OBJECT;
 	}
 
 	bops	    = NULL;

net/netfilter/nft_set_hash.c

@@ -404,7 +404,7 @@ static struct nft_set_ops nft_hash_ops __read_mostly = {
 	.lookup		= nft_hash_lookup,
 	.update		= nft_hash_update,
 	.walk		= nft_hash_walk,
-	.features	= NFT_SET_MAP | NFT_SET_TIMEOUT,
+	.features	= NFT_SET_MAP | NFT_SET_OBJECT | NFT_SET_TIMEOUT,
 	.owner		= THIS_MODULE,
 };
 

net/netfilter/nft_set_rbtree.c

@@ -310,7 +310,7 @@ static struct nft_set_ops nft_rbtree_ops __read_mostly = {
 	.activate	= nft_rbtree_activate,
 	.lookup		= nft_rbtree_lookup,
 	.walk		= nft_rbtree_walk,
-	.features	= NFT_SET_INTERVAL | NFT_SET_MAP,
+	.features	= NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_OBJECT,
 	.owner		= THIS_MODULE,
 };