======================================
| xx__-> [  147.003192] ------------[ cut here ]------------
| [  147.003222] workqueue: ovpn is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU.
| [  147.003249] WARNING: kernel/workqueue.c:5851 at __alloc_workqueue+0x6de/0x750, CPU#0: modprobe/2030
| [  147.003283] Modules linked in: ovpn(+) ip6_udp_tunnel udp_tunnel 8021q
[  147.003333] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  147.003354] RIP: 0010:__alloc_workqueue (kernel/workqueue.c:5851 (discriminator 7))
[  147.003375] Code: 48 89 b0 90 00 00 00 48 89 16 48 89 51 08 e9 7b fd ff ff 90 0f 0b 90 45 31 ed e9 ed fd ff ff 48 8d 3d 82 1b 4b 01 48 8b 34 24 <67> 48 0f b9 3a 80 cf 01 e9 a3 f9 ff ff 49 3b 45 08 0f 85 49 fe ff
All code
========
   0:	48 89 b0 90 00 00 00 	mov    %rsi,0x90(%rax)
   7:	48 89 16             	mov    %rdx,(%rsi)
   a:	48 89 51 08          	mov    %rdx,0x8(%rcx)
   e:	e9 7b fd ff ff       	jmp    0xfffffffffffffd8e
  13:	90                   	nop
  14:	0f 0b                	ud2
  16:	90                   	nop
  17:	45 31 ed             	xor    %r13d,%r13d
  1a:	e9 ed fd ff ff       	jmp    0xfffffffffffffe0c
  1f:	48 8d 3d 82 1b 4b 01 	lea    0x14b1b82(%rip),%rdi        # 0x14b1ba8
  26:	48 8b 34 24          	mov    (%rsp),%rsi
  2a:*	67 48 0f b9 3a       	ud1    (%edx),%rdi		<-- trapping instruction
  2f:	80 cf 01             	or     $0x1,%bh
  32:	e9 a3 f9 ff ff       	jmp    0xfffffffffffff9da
  37:	49 3b 45 08          	cmp    0x8(%r13),%rax
  3b:	0f                   	.byte 0xf
  3c:	85 49 fe             	test   %ecx,-0x2(%rcx)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	67 48 0f b9 3a       	ud1    (%edx),%rdi
   5:	80 cf 01             	or     $0x1,%bh
   8:	e9 a3 f9 ff ff       	jmp    0xfffffffffffff9b0
   d:	49 3b 45 08          	cmp    0x8(%r13),%rax
  11:	0f                   	.byte 0xf
  12:	85 49 fe             	test   %ecx,-0x2(%rcx)
  15:	ff                   	.byte 0xff
[  147.003428] RSP: 0018:ff6d45a34182bc68 EFLAGS: 00010246
[  147.003446] RAX: 0000000000000004 RBX: 0000000000000000 RCX: 0000000000000004
[  147.003467] RDX: 0000000000000000 RSI: ff19ec8bc4110ab8 RDI: ffffffffa0c6b5f0
[  147.003491] RBP: ffffffffc0221c06 R08: ffffffffc0221c0a R09: 0000000000000000
[  147.003512] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[  147.003533] R13: ff19ec8bc4110a00 R14: ff6d45a34182bcb8 R15: 0000000000000000
[  147.003560] FS:  00007f8548912bc0(0000) GS:ff19ec8c5da54000(0000) knlGS:0000000000000000
[  147.003584] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  147.003604] CR2: 00007f8548a6dc40 CR3: 0000000003106006 CR4: 0000000000771ef0
[  147.003625] PKRU: 55555554
[  147.003636] Call Trace:
[  147.003645]  <TASK>
[  147.003653]  ? udp_tunnel_nic_cleanup_module (net/ipv4/udp_tunnel_nic.c:363 (discriminator 3)) udp_tunnel
[  147.003675]  alloc_workqueue_noprof (kernel/workqueue.c:5946 kernel/workqueue.c:5962)
[  147.003693] ovpn_init (drivers/net/ovpn/bind.c:33) ovpn
[  147.003705]  do_one_initcall (init/main.c:1347)
[  147.003719]  do_init_module (kernel/module/main.c:3106)
[  147.003736]  init_module_from_file (kernel/module/main.c:3777)
[  147.003754]  idempotent_init_module (kernel/module/main.c:3789)
[  147.003773]  __x64_sys_finit_module (kernel/module/main.c:3815 kernel/module/main.c:3799 kernel/module/main.c:3799)
[  147.003791]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  147.003805]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  147.003823] RIP: 0033:0x7f8548a0837d
[  147.003834] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 4b aa 0f 00 f7 d8 64 89 01 48
All code
========
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00 
   c:	90                   	nop
   d:	f3 0f 1e fa          	endbr64
  11:	48 89 f8             	mov    %rdi,%rax
  14:	48 89 f7             	mov    %rsi,%rdi
  17:	48 89 d6             	mov    %rdx,%rsi
  1a:	48 89 ca             	mov    %rcx,%rdx
  1d:	4d 89 c2             	mov    %r8,%r10
  20:	4d 89 c8             	mov    %r9,%r8
  23:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa85
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa5b
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[  147.003889] RSP: 002b:00007ffff9d51478 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[  147.003914] RAX: ffffffffffffffda RBX: 000055e5deefa9b0 RCX: 00007f8548a0837d
[  147.003936] RDX: 0000000000000000 RSI: 000055e5a066fffd RDI: 0000000000000007
[  147.003959] RBP: 00007ffff9d51510 R08: 0000000000000000 R09: 0000000000000000
[  147.003978] R10: 0000000000000000 R11: 0000000000000246 R12: 000055e5a066fffd


Finger prints:
__alloc_workqueue:alloc_workqueue_noprof:ovpn_init:do_one_initcall:do_init_module