netfilter: nf_tables: wait for call_rcu completion on module removal

Make sure the objects have been released before the nf_tables modules
is removed.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 19e79f0..556a0df 100644 (file)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -4163,6 +4163,7 @@ static void __exit nf_tables_module_exit(void)
 {
        unregister_pernet_subsys(&nf_tables_net_ops);
        nfnetlink_subsys_unregister(&nf_tables_subsys);
+       rcu_barrier();
        nf_tables_core_module_exit();
        kfree(info);
 }