[  660.381386][    C1] tun0: no available key for peer 1, key-id: 0
[  660.638843][    C3] tun0: no available key for peer 4, key-id: 0
[  660.738645][    C1] tun0: no available key for peer 5, key-id: 0
[  660.859880][ T4934] tun0: no available key for peer 6, key-id: 0
[  660.860176][ T4934] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u16:2/4934
[  660.860408][ T4934] caller is ovpn_recv+0x192/0x2a0 [ovpn]
[  660.860574][ T4934] CPU: 0 UID: 0 PID: 4934 Comm: kworker/u16:2 Not tainted 7.0.0-rc2-virtme #1 PREEMPT(full) 
[  660.860578][ T4934] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  660.860580][ T4934] Workqueue: kstrp strp_work
[  660.860588][ T4934] Call Trace:
[  660.860590][ T4934]  <TASK>
[  660.860592][ T4934]  dump_stack_lvl+0x6f/0xa0
[  660.860599][ T4934]  check_preemption_disabled+0xdb/0xf0
[  660.860604][ T4934]  ovpn_recv+0x192/0x2a0 [ovpn]
[  660.860609][ T4934]  ovpn_tcp_rcv+0x277/0x920 [ovpn]
[  660.860614][ T4934]  ? ovpn_tcp_write_space+0x2b0/0x2b0 [ovpn]
[  660.860618][ T4934]  ? ovpn_tcp_disconnect+0x10/0x10 [ovpn]
[  660.860621][ T4934]  ? __build_skb_around+0x290/0x330
[  660.860627][ T4934]  __strp_recv+0x1ee/0x1b70
[  660.860632][ T4934]  ? rcu_lockdep_current_cpu_online+0x39/0x1b0
[  660.860638][ T4934]  __tcp_read_sock+0x1a1/0x7c0
[  660.860642][ T4934]  ? strp_process+0xb0/0xb0
[  660.860645][ T4934]  ? tcp_cleanup_rbuf+0x1c0/0x1c0
[  660.860651][ T4934]  strp_read_sock+0x20f/0x2b0
[  660.860654][ T4934]  ? strp_stop+0x50/0x50
[  660.860656][ T4934]  ? __lock_release.isra.0+0x59/0x170
[  660.860661][ T4934]  ? lockdep_hardirqs_on+0x84/0x130
[  660.860663][ T4934]  ? __local_bh_enable_ip+0xa3/0x140
[  660.860667][ T4934]  strp_work+0x9f/0xe0
[  660.860669][ T4934]  process_one_work+0xd57/0x1390
[  660.860677][ T4934]  ? pwq_dec_nr_in_flight+0x700/0x700
[  660.860679][ T4934]  ? lock_acquire.part.0+0xbc/0x260
[  660.860686][ T4934]  worker_thread+0x4d6/0xd40
[  660.860690][ T4934]  ? rescuer_thread+0x1330/0x1330
[  660.860693][ T4934]  ? __kthread_parkme+0xb3/0x200
[  660.860697][ T4934]  ? rescuer_thread+0x1330/0x1330
[  660.860699][ T4934]  kthread+0x30f/0x3f0
[  660.860702][ T4934]  ? trace_irq_enable.constprop.0+0x13c/0x190
[  660.860706][ T4934]  ? kthread_affine_node+0x150/0x150
[  660.860709][ T4934]  ret_from_fork+0x472/0x6b0
[  660.860713][ T4934]  ? arch_exit_to_user_mode_prepare.isra.0+0x140/0x140
[  660.860717][ T4934]  ? __switch_to+0x538/0xcf0
[  660.860720][ T4934]  ? kthread_affine_node+0x150/0x150
[  660.860723][ T4934]  ret_from_fork_asm+0x11/0x20
[  660.860731][ T4934]  </TASK>
[  670.025418][ T4972] iperf3 (4972) used greatest stack depth: 23240 bytes left
[  670.297476][ T4922] tun1: deleting peer with id 10, reason 4
[  670.300269][ T4928] tun3: deleting peer with id 12, reason 4
[  670.305350][ T4925] tun2: deleting peer with id 11, reason 4
[  670.311019][ T4940] tun0: deleting peer with id 6, reason 4
[  670.312140][ T4938] tun6: deleting peer with id 15, reason 4
[  670.312252][ T4931] tun4: deleting peer with id 13, reason 4
[  670.316214][ T4935] tun5: deleting peer with id 14, reason 4
[  670.318033][ T4940] tun0: deleting peer with id 5, reason 4
[  670.323274][ T4940] tun0: deleting peer with id 4, reason 4
[  670.336200][ T4940] tun0: deleting peer with id 3, reason 4
[  670.343214][ T4940] tun0: deleting peer with id 2, reason 4
[  670.351160][ T4940] tun0: deleting peer with id 1, reason 4