======================================
| [    1.871047] #PF: supervisor write access in kernel mode
| [    1.871090] #PF: error_code(0x0002) - not-present page
| [    1.871132] PGD 4b03067 P4D 4b03067 PUD 4af4067 PMD 0
| [    1.871174] Oops: Oops: 0002 [#1] SMP
[    1.871280] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    1.871331] RIP: 0010:work_grab_pending (./arch/x86/include/asm/bitops.h:136 ./include/asm-generic/bitops/instrumented-atomic.h:72 kernel/workqueue.c:2072 kernel/workqueue.c:2160)
[    1.871380] Code: 83 e6 01 41 57 41 56 4c 8d 77 20 41 55 41 54 41 89 f4 55 48 89 d5 53 48 89 fb 9c 58 fa 48 89 45 00 45 85 e4 0f 85 8a 00 00 00 <f0> 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41
All code
========
   0:	83 e6 01             	and    $0x1,%esi
   3:	41 57                	push   %r15
   5:	41 56                	push   %r14
   7:	4c 8d 77 20          	lea    0x20(%rdi),%r14
   b:	41 55                	push   %r13
   d:	41 54                	push   %r12
   f:	41 89 f4             	mov    %esi,%r12d
  12:	55                   	push   %rbp
  13:	48 89 d5             	mov    %rdx,%rbp
  16:	53                   	push   %rbx
  17:	48 89 fb             	mov    %rdi,%rbx
  1a:	9c                   	pushf
  1b:	58                   	pop    %rax
  1c:	fa                   	cli
  1d:	48 89 45 00          	mov    %rax,0x0(%rbp)
  21:	45 85 e4             	test   %r12d,%r12d
  24:	0f 85 8a 00 00 00    	jne    0xb4
  2a:*	f0 48 0f ba 2b 00    	lock btsq $0x0,(%rbx)		<-- trapping instruction
  30:	41 0f 92 c5          	setb   %r13b
  34:	72 0e                	jb     0x44
  36:	5b                   	pop    %rbx
  37:	44 89 e8             	mov    %r13d,%eax
  3a:	5d                   	pop    %rbp
  3b:	41 5c                	pop    %r12
  3d:	41 5d                	pop    %r13
  3f:	41                   	rex.B

Code starting with the faulting instruction
===========================================
   0:	f0 48 0f ba 2b 00    	lock btsq $0x0,(%rbx)
   6:	41 0f 92 c5          	setb   %r13b
   a:	72 0e                	jb     0x1a
   c:	5b                   	pop    %rbx
   d:	44 89 e8             	mov    %r13d,%eax
  10:	5d                   	pop    %rbp
  11:	41 5c                	pop    %r12
  13:	41 5d                	pop    %r13
  15:	41                   	rex.B
[    1.871520] RSP: 0018:ffffaecb405bf748 EFLAGS: 00010046
[    1.871563] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000001
[    1.871620] RDX: ffffaecb405bf780 RSI: 0000000000000000 RDI: 0000000000000000
[    1.871679] RBP: ffffaecb405bf780 R08: ffffffffb315ba28 R09: 00000000ffffdfff
[    1.871738] R10: ffffffffb307ba40 R11: ffffffffb312ba40 R12: 0000000000000000
[    1.871797] R13: ffffaecb405bf878 R14: 0000000000000020 R15: 00000000ffffffff
[    1.871860] FS:  00007efeda786b80(0000) GS:ffff9809cb491000(0000) knlGS:0000000000000000
[    1.871919] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.871968] CR2: 0000000000000000 CR3: 0000000004af1003 CR4: 0000000000772ef0
[    1.872026] PKRU: 55555554
[    1.872049] Call Trace:
[    1.872070]  <TASK>
[    1.872094]  __cancel_work (kernel/workqueue.c:4366)
[    1.872131]  __cancel_work_sync (kernel/workqueue.c:4381)
[    1.872163]  __dev_close_many (net/core/dev.c:1879 (discriminator 2) net/core/dev.c:1932 (discriminator 2))
[    1.872203]  netif_close_many (net/core/dev.c:1959)
[    1.872240]  unregister_netdevice_many_notify (net/core/dev.c:12545)
[    1.872282]  rtnl_dellink (net/core/rtnetlink.c:157 ./include/linux/rtnetlink.h:135 net/core/rtnetlink.c:3578)
[    1.872321]  ? get_page_from_freelist (mm/page_alloc.c:1226 mm/page_alloc.c:1848 mm/page_alloc.c:1858 mm/page_alloc.c:3884)
[    1.872367]  ? rtnl_bridge_getlink (net/core/rtnetlink.c:3536)
[    1.872411]  rtnetlink_rcv_msg (net/core/rtnetlink.c:6959)
[    1.872445]  ? rtnl_calcit.isra.0 (net/core/rtnetlink.c:6861)
[    1.872485]  netlink_rcv_skb (net/netlink/af_netlink.c:2550)
[    1.872525]  netlink_unicast (net/netlink/af_netlink.c:1319 net/netlink/af_netlink.c:1344)
[    1.872555]  ? __alloc_skb (net/core/skbuff.c:706)
[    1.872596]  netlink_sendmsg (net/netlink/af_netlink.c:1894)
[    1.872628]  __sys_sendto (net/socket.c:727 net/socket.c:742 net/socket.c:2244)
[    1.872663]  ? alloc_file_pseudo (./include/linux/fs.h:3233 fs/file_table.c:393)
[    1.872699]  ? sock_alloc_file (./include/linux/fs.h:3233 net/socket.c:499)
[    1.872730]  ? __sys_socket (net/socket.c:516 net/socket.c:1756)
[    1.872761]  __x64_sys_sendto (net/socket.c:2251 net/socket.c:2247 net/socket.c:2247)
[    1.872792]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    1.872829]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[    1.872870] RIP: 0033:0x7efeda899120
[    1.872901] Code: ff ff 64 89 02 eb bd 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 1d 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 68 c3 0f 1f 80 00 00 00 00 41 54 48 83 ec 20
All code
========
   0:	ff                   	(bad)
   1:	ff 64 89 02          	jmp    *0x2(%rcx,%rcx,4)
   5:	eb bd                	jmp    0xffffffffffffffc4
   7:	0f 1f 00             	nopl   (%rax)
   a:	f3 0f 1e fa          	endbr64
   e:	41 89 ca             	mov    %ecx,%r10d
  11:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  18:	00 
  19:	85 c0                	test   %eax,%eax
  1b:	75 1d                	jne    0x3a
  1d:	45 31 c9             	xor    %r9d,%r9d
  20:	45 31 c0             	xor    %r8d,%r8d
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 68                	ja     0x9a
  32:	c3                   	ret
  33:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  3a:	41 54                	push   %r12
  3c:	48 83 ec 20          	sub    $0x20,%rsp

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 68                	ja     0x70
   8:	c3                   	ret
   9:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  10:	41 54                	push   %r12
  12:	48 83 ec 20          	sub    $0x20,%rsp
[    1.873023] RSP: 002b:00007fff39466ad8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[    1.873080] RAX: ffffffffffffffda RBX: 0000000000000030 RCX: 00007efeda899120
[    1.873137] RDX: 0000000000000030 RSI: 00007fff39466ae0 RDI: 0000000000000005
[    1.873193] RBP: 00000000004047d0 R08: 0000000000000000 R09: 0000000000000000
[    1.873250] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005


Finger prints:
work_grab_pending:__cancel_work:__cancel_work_sync:__dev_close_many:netif_close_many