======================================
| [ 1467.498133] #PF: supervisor read access in kernel mode
| [ 1467.498170] #PF: error_code(0x0000) - not-present page
| [ 1467.498205] PGD 0 P4D 0
| [ 1467.498232] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 1467.498318] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1467.498363] RIP: 0010:hrtimer_active (./include/linux/seqlock.h:226 kernel/time/hrtimer.c:1727) 
[ 1467.498405] Code: 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 48 8b 47 30 <8b> 50 10 f6 c2 01 75 23 80 7f 38 00 75 29 48 39 78 18 74 23 8b 48
All code
========
   0:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   7:	00 00 00 00 
   b:	66 90                	xchg   %ax,%ax
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	f3 0f 1e fa          	endbr64
  21:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  26:	48 8b 47 30          	mov    0x30(%rdi),%rax
  2a:*	8b 50 10             	mov    0x10(%rax),%edx		<-- trapping instruction
  2d:	f6 c2 01             	test   $0x1,%dl
  30:	75 23                	jne    0x55
  32:	80 7f 38 00          	cmpb   $0x0,0x38(%rdi)
  36:	75 29                	jne    0x61
  38:	48 39 78 18          	cmp    %rdi,0x18(%rax)
  3c:	74 23                	je     0x61
  3e:	8b                   	.byte 0x8b
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	8b 50 10             	mov    0x10(%rax),%edx
   3:	f6 c2 01             	test   $0x1,%dl
   6:	75 23                	jne    0x2b
   8:	80 7f 38 00          	cmpb   $0x0,0x38(%rdi)
   c:	75 29                	jne    0x37
   e:	48 39 78 18          	cmp    %rdi,0x18(%rax)
  12:	74 23                	je     0x37
  14:	8b                   	.byte 0x8b
  15:	48                   	rex.W
[ 1467.498518] RSP: 0018:ffff9e1240827b38 EFLAGS: 00010202
[ 1467.498555] RAX: 0000000000000000 RBX: ffff9167832ad5d0 RCX: 0000000000000003
[ 1467.498606] RDX: 0000000000000000 RSI: 0000000000000006 RDI: ffff9167832ad5d0
[ 1467.498658] RBP: 0000000000000001 R08: 0000000000000008 R09: 0000000000000002
[ 1467.498704] R10: ffff9167bed2f580 R11: ffff9167832c5c90 R12: ffff916784f12000
[ 1467.498757] R13: ffff916784f12000 R14: ffff916784f12000 R15: 0000000000000000
[ 1467.498811] FS:  00007f887a6271c0(0000) GS:ffff9167bed00000(0000) knlGS:0000000000000000
[ 1467.498864] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1467.498908] CR2: 0000000000000010 CR3: 000000000864e003 CR4: 0000000000772ef0
[ 1467.498962] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1467.499014] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1467.499060] PKRU: 55555554
[ 1467.499082] Call Trace:
[ 1467.499100]  <TASK>
[ 1467.499121] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434) 
[ 1467.499154] ? page_fault_oops (arch/x86/mm/fault.c:714) 
[ 1467.499186] ? check_preempt_wakeup_fair (kernel/sched/fair.c:8810) 
[ 1467.499224] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/mm/fault.c:1488 arch/x86/mm/fault.c:1538) 
[ 1467.499259] ? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[ 1467.499291] ? hrtimer_active (./include/linux/seqlock.h:226 kernel/time/hrtimer.c:1727) 
[ 1467.499319] hrtimer_cancel (kernel/time/hrtimer.c:1373 kernel/time/hrtimer.c:1502) 
[ 1467.499350] nsim_stop (drivers/net/netdevsim/netdev.c:483 drivers/net/netdevsim/netdev.c:504) netdevsim 
[ 1467.499395] __dev_close_many (net/core/dev.c:1720) 
[ 1467.499429] dev_close_many (net/core/dev.c:1747) 
[ 1467.499460] unregister_netdevice_many_notify (net/core/dev.c:11828) 
[ 1467.499497] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:2934 kernel/rcu/tree.c:2950 kernel/rcu/tree.c:3089) 
[ 1467.499537] unregister_netdevice_queue (net/core/dev.c:11777) 
[ 1467.499573] nsim_destroy (drivers/net/netdevsim/netdevsim.h:387 (discriminator 2) drivers/net/netdevsim/netdev.c:1039 (discriminator 2)) netdevsim 
[ 1467.499613] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1429) netdevsim 
[ 1467.499656] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1438 drivers/net/netdevsim/dev.c:1661) netdevsim 
[ 1467.499695] nsim_drv_remove (drivers/net/netdevsim/dev.c:1678) netdevsim 
[ 1467.499738] device_release_driver_internal (drivers/base/dd.c:1275 drivers/base/dd.c:1296) 
[ 1467.499778] bus_remove_device (./include/linux/kobject.h:193 (discriminator 3) drivers/base/base.h:73 (discriminator 3) drivers/base/bus.c:586 (discriminator 3)) 
[ 1467.499806] device_del (drivers/base/core.c:3855) 
[ 1467.499835] device_unregister (drivers/base/core.c:3772 drivers/base/core.c:3896) 
[ 1467.499864] del_device_store (drivers/net/netdevsim/bus.c:230) netdevsim 
[ 1467.499906] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[ 1467.499946] vfs_write (fs/read_write.c:586 fs/read_write.c:679) 
[ 1467.499975] ksys_write (fs/read_write.c:731) 
[ 1467.500003] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 1467.500032] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1467.500068] RIP: 0033:0x7f887a841b77
[ 1467.500096] Code: 0b 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
All code
========
   0:	0b 00                	or     (%rax),%eax
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b7                	jmp    0xffffffffffffffc7
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 01 00 00 00       	mov    $0x1,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	74 24                	je     0x64

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	48 89 54 24 18       	mov    %rdx,0x18(%rsp)
  12:	48                   	rex.W
  13:	89                   	.byte 0x89
  14:	74 24                	je     0x3a
[ 1467.500207] RSP: 002b:00007ffce5b36a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 1467.500259] RAX: ffffffffffffffda RBX: 00007f887a627140 RCX: 00007f887a841b77
[ 1467.500304] RDX: 0000000000000005 RSI: 000055b676386f50 RDI: 0000000000000006
[ 1467.500355] RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
[ 1467.500400] R10: 0000000000000002 R11: 0000000000000246 R12: 00007f886c57d100


Finger prints:
hrtimer_active:hrtimer_cancel:nsim_stop:__dev_close_many:dev_close_many