[  581.517455][    C2] tun0: no available key for peer 2, key-id: 0
[  581.710599][   T12] tun0: no available key for peer 4, key-id: 0
[  581.711190][   T12] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u16:0/12
[  581.711597][   T12] caller is ovpn_recv+0x193/0x2b0 [ovpn]
[  581.711853][   T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 7.1.0-rc1-virtme #1 PREEMPT(full) 
[  581.711859][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  581.711861][   T12] Workqueue: kstrp strp_work
[  581.711871][   T12] Call Trace:
[  581.711874][   T12]  <TASK>
[  581.711877][   T12]  dump_stack_lvl+0x6f/0xa0
[  581.711887][   T12]  check_preemption_disabled+0xdb/0xf0
[  581.711893][   T12]  ovpn_recv+0x193/0x2b0 [ovpn]
[  581.711904][   T12]  ovpn_tcp_rcv+0x279/0x910 [ovpn]
[  581.711912][   T12]  ? ovpn_tcp_write_space+0x2e0/0x2e0 [ovpn]
[  581.711918][   T12]  ? __copy_skb_header+0xb7/0x510
[  581.711924][   T12]  ? ovpn_tcp_disconnect+0x10/0x10 [ovpn]
[  581.711929][   T12]  ? csum_and_copy_from_iter_full+0xb00/0x1f70
[  581.711935][   T12]  __strp_recv+0x20f/0x1c30
[  581.711944][   T12]  ? lock_acquire.part.0+0xbc/0x260
[  581.711952][   T12]  __tcp_read_sock+0x1c7/0x850
[  581.711957][   T12]  ? strp_process+0xb0/0xb0
[  581.711963][   T12]  ? tcp_cleanup_rbuf+0x1c0/0x1c0
[  581.711967][   T12]  ? __lock_sock+0x19c/0x230
[  581.711976][   T12]  strp_read_sock+0x20f/0x2b0
[  581.711980][   T12]  ? strp_stop+0x50/0x50
[  581.711983][   T12]  ? __lock_release.isra.0+0x6b/0x1a0
[  581.711989][   T12]  ? lockdep_hardirqs_on+0x8c/0x130
[  581.711992][   T12]  ? __local_bh_enable_ip+0xa5/0x140
[  581.712002][   T12]  strp_work+0x9f/0xe0
[  581.712006][   T12]  process_one_work+0xdf5/0x1410
[  581.712018][   T12]  ? pwq_dec_nr_in_flight+0x710/0x710
[  581.712021][   T12]  ? lock_acquire.part.0+0xbc/0x260
[  581.712033][   T12]  worker_thread+0x4f1/0xd60
[  581.712044][   T12]  ? rescuer_thread+0x1320/0x1320
[  581.712047][   T12]  kthread+0x364/0x460
[  581.712051][   T12]  ? trace_irq_enable.constprop.0+0x9b/0x180
[  581.712056][   T12]  ? kthread_affine_node+0x330/0x330
[  581.712060][   T12]  ret_from_fork+0x474/0x6b0
[  581.712066][   T12]  ? arch_exit_to_user_mode_prepare.isra.0+0x120/0x120
[  581.712071][   T12]  ? __switch_to+0x5a3/0xe00
[  581.712076][   T12]  ? kthread_affine_node+0x330/0x330
[  581.712080][   T12]  ret_from_fork_asm+0x11/0x20
[  581.712094][   T12]  </TASK>
[  581.789698][    C2] tun0: no available key for peer 5, key-id: 0
[  581.875432][    C3] tun0: no available key for peer 6, key-id: 0
[  600.842045][ T8583] iperf3 (8583) used greatest stack depth: 22424 bytes left
[  602.988814][ T8677] tun0: deleting peer with id 1, reason 1
[  603.066851][ T8681] tun1: deleting peer with id 1, reason 1
[  605.987900][ T8729] tun0: deleting peer with id 2, reason 1
[  606.065723][ T8733] tun2: deleting peer with id 2, reason 1
[  612.381426][   T10] tun0: deleting peer with id 4, reason 2
[  612.382467][   T10] tun0: deleting peer with id 3, reason 2
[  612.382820][   T10] tun0: deleting peer with id 5, reason 2
[  612.383225][   T10] tun0: deleting peer with id 6, reason 2
[  617.629882][  T529] tun3: deleting peer with id 3, reason 2
[  617.758074][   T65] tun4: deleting peer with id 4, reason 2
[  617.885088][   T65] tun5: deleting peer with id 5, reason 2
[  618.013072][   T65] tun6: deleting peer with id 6, reason 2