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>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 19e79f0d9ad2..556a0dfa4abc 100644
--- 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);
 }