netfilter: nf_tables: allow to fetch set elements when table has an owner

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2189550
Upstream Status: commit 92f3e96

commit 92f3e96
Author: Pablo Neira Ayuso <pablo@netfilter.org>
Date:   Wed Feb 8 11:34:27 2023 +0100

    netfilter: nf_tables: allow to fetch set elements when table has an owner

    NFT_MSG_GETSETELEM returns -EPERM when fetching set elements that belong
    to table that has an owner. This results in empty set/map listing from
    userspace.

    Fixes: 6001a93 ("netfilter: nftables: introduce table ownership")
    Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Signed-off-by: Florian Westphal <fwestpha@redhat.com>

Author: fw-strlen

net/netfilter/nf_tables_api.c

@@ -5368,7 +5368,7 @@ static int nf_tables_getsetelem(struct sk_buff *skb,
 	int rem, err = 0;
 
 	table = nft_table_lookup(net, nla[NFTA_SET_ELEM_LIST_TABLE], family,
-				 genmask, NETLINK_CB(skb).portid);
+				 genmask, 0);
 	if (IS_ERR(table)) {
 		NL_SET_BAD_ATTR(extack, nla[NFTA_SET_ELEM_LIST_TABLE]);
 		return PTR_ERR(table);