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nstree: simplify owner list iteration 

Make use of list_for_each_entry_from_rcu().

Link: https://patch.msgid.link/20251110-work-namespace-nstree-fixes-v1-6-e8a9264e0fb9@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-11-10 16:08:18 +01:00
parent a657bc8a75
commit 8a30420c89
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GPG Key ID: 91C61BC06578DCA2
1 changed files with 7 additions and 3 deletions
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10
kernel/nstree.c
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@ -598,11 +598,15 @@ static ssize_t do_listns_userns(struct klistns *kls)
rcu_read_lock();
if (!first_ns)
first_ns = list_entry_rcu(head->next, typeof(*ns), ns_owner_node.ns_list_entry);
for (ns = first_ns; &ns->ns_owner_node.ns_list_entry != head && nr_ns_ids;
ns = list_entry_rcu(ns->ns_owner_node.ns_list_entry.next, typeof(*ns), ns_owner_node.ns_list_entry)) {
first_ns = list_entry_rcu(head->next, typeof(*first_ns), ns_owner_node.ns_list_entry);
ns = first_ns;
list_for_each_entry_from_rcu(ns, head, ns_owner_node.ns_list_entry) {
struct ns_common *valid;
if (!nr_ns_ids)
break;
valid = legitimize_ns(kls, ns);
if (!valid)
continue;