Commit 46e235c1 authored Oct 26, 2017 by Cong Wang Committed by David S. Miller Oct 29, 2017

net_sched: fix call_rcu() race on act_sample module removal

Similar to commit c78e1746
("net: sched: fix call_rcu() race on classifier module unloads"),
we need to wait for flying RCU callback tcf_sample_cleanup_rcu().

Cc: Yotam Gigi <yotamg@mellanox.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 2d132eba

net/sched/act_sample.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -264,6 +264,7 @@ static int __init sample_init_module(void)

		static void __exit sample_cleanup_module(void)
		{
		rcu_barrier();
		tcf_unregister_action(&act_sample_ops, &sample_net_ops);
		}