netfilter: nf_tables: use correct lock to protect gc_list

JIRA: https://issues.redhat.com/browse/RHEL-1720
JIRA: https://issues.redhat.com/browse/RHEL-1721
Upstream Status: commit 8357bc9

commit 8357bc9
Author: Pablo Neira Ayuso <pablo@netfilter.org>
Date:   Mon Aug 21 14:33:32 2023 +0200

    netfilter: nf_tables: use correct lock to protect gc_list

    Use nf_tables_gc_list_lock spinlock, not nf_tables_destroy_list_lock to
    protect the gc list.

    Fixes: 5f68718 ("netfilter: nf_tables: GC transaction API to avoid race with control plane")
    Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
    Signed-off-by: Florian Westphal <fw@strlen.de>

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

Author: fw-strlen

net/netfilter/nf_tables_api.c

@@ -9121,9 +9121,9 @@ static void nft_trans_gc_work(struct work_struct *work)
 	struct nft_trans_gc *trans, *next;
 	LIST_HEAD(trans_gc_list);
 
-	spin_lock(&nf_tables_destroy_list_lock);
+	spin_lock(&nf_tables_gc_list_lock);
 	list_splice_init(&nf_tables_gc_list, &trans_gc_list);
-	spin_unlock(&nf_tables_destroy_list_lock);
+	spin_unlock(&nf_tables_gc_list_lock);
 
 	list_for_each_entry_safe(trans, next, &trans_gc_list, list) {
 		list_del(&trans->list);