======================================
| [  386.694219] #PF: supervisor read access in kernel mode
| [  386.694475] #PF: error_code(0x0000) - not-present page
| [  386.694700] PGD 0 P4D 0
| [  386.694764] Oops: 0000 [#1] PREEMPT SMP NOPTI
[  386.695143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  386.695352] RIP: 0010:skb_queue_purge_reason (./include/linux/skbuff.h:1846 net/core/skbuff.c:3821) 
[ 386.695547] Code: f3 0f 1e fa 0f 1f 44 00 00 55 48 89 e5 41 56 41 55 41 54 53 48 83 e4 f0 48 83 ec 20 65 48 8b 04 25 28 00 00 00 48 89 44 24 18 <48> 8b 07 48 39 c7 0f 84 b2 00 00 00 4c 8d 77 14 48 89 e3 49 89 fd
All code
========
   0:	f3 0f 1e fa          	endbr64
   4:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   9:	55                   	push   %rbp
   a:	48 89 e5             	mov    %rsp,%rbp
   d:	41 56                	push   %r14
   f:	41 55                	push   %r13
  11:	41 54                	push   %r12
  13:	53                   	push   %rbx
  14:	48 83 e4 f0          	and    $0xfffffffffffffff0,%rsp
  18:	48 83 ec 20          	sub    $0x20,%rsp
  1c:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  23:	00 00 
  25:	48 89 44 24 18       	mov    %rax,0x18(%rsp)
  2a:*	48 8b 07             	mov    (%rdi),%rax		<-- trapping instruction
  2d:	48 39 c7             	cmp    %rax,%rdi
  30:	0f 84 b2 00 00 00    	je     0xe8
  36:	4c 8d 77 14          	lea    0x14(%rdi),%r14
  3a:	48 89 e3             	mov    %rsp,%rbx
  3d:	49 89 fd             	mov    %rdi,%r13

Code starting with the faulting instruction
===========================================
   0:	48 8b 07             	mov    (%rdi),%rax
   3:	48 39 c7             	cmp    %rax,%rdi
   6:	0f 84 b2 00 00 00    	je     0xbe
   c:	4c 8d 77 14          	lea    0x14(%rdi),%r14
  10:	48 89 e3             	mov    %rsp,%rbx
  13:	49 89 fd             	mov    %rdi,%r13
[  386.696157] RSP: 0018:ffffb160c15ebc70 EFLAGS: 00010282
[  386.696321] RAX: 3376a29ef063af00 RBX: ffff8ce5424c0920 RCX: 0000000000000001
[  386.696627] RDX: 0000000000000001 RSI: 0000000000000055 RDI: 0000000000000190
[  386.696851] RBP: ffffb160c15ebcb0 R08: ffffffffa47574e0 R09: ffffffffa47574e0
[  386.697466] R10: 0000000000000002 R11: 0000000000000002 R12: ffff8ce5424c0000
[  386.697748] R13: 0000000000000001 R14: 0000000000000080 R15: ffff8ce5424f09e0
[  386.698044] FS:  00007f4d2ca0a740(0000) GS:ffff8ce57ec80000(0000) knlGS:0000000000000000
[  386.698208] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  386.698315] CR2: 0000000000000190 CR3: 0000000002626005 CR4: 0000000000770ef0
[  386.698565] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  386.698779] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  386.698938] PKRU: 55555554
[  386.699062] Call Trace:
[  386.699262]  <TASK>
[  386.699375] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434) 
[  386.699487] ? page_fault_oops (arch/x86/mm/fault.c:713) 
[  386.699616] ? finish_wait (./include/linux/list.h:218 ./include/linux/list.h:287 kernel/sched/wait.c:376) 
[  386.699722] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:72 arch/x86/mm/fault.c:1513 arch/x86/mm/fault.c:1563) 
[  386.699793] ? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[  386.699924] ? skb_queue_purge_reason (./include/linux/skbuff.h:1846 net/core/skbuff.c:3821) 
[  386.700163] nsim_destroy (drivers/net/netdevsim/netdev.c:653 drivers/net/netdevsim/netdev.c:784) netdevsim
[  386.700266] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:426 drivers/net/netdevsim/dev.c:1426) netdevsim
[  386.700425] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:591 drivers/net/netdevsim/dev.c:1655) netdevsim
[  386.700617] nsim_drv_remove (drivers/net/netdevsim/dev.c:1675) netdevsim
[  386.700733] device_release_driver_internal (drivers/base/dd.c:1272 drivers/base/dd.c:1293) 
[  386.700839] bus_remove_device (./include/linux/kobject.h:193 (discriminator 3) drivers/base/base.h:73 (discriminator 3) drivers/base/bus.c:581 (discriminator 3)) 
[  386.700922] device_del (drivers/base/core.c:3910) 
[  386.701049] device_unregister (drivers/base/core.c:3827 drivers/base/core.c:3951) 
[  386.701701] del_device_store (drivers/net/netdevsim/bus.c:230) netdevsim
[  386.702579] kernfs_fop_write_iter (fs/kernfs/file.c:334) 
[  386.702769] vfs_write (./include/linux/fs.h:2110 fs/read_write.c:497 fs/read_write.c:590) 
[  386.702858] ksys_write (fs/read_write.c:643) 
[  386.702949] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[  386.703051] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  386.703155] RIP: 0033:0x7f4d2cb4b957
[ 386.703233] 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
[  386.703536] RSP: 002b:00007ffc7d0820f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  386.703662] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4d2cb4b957
[  386.703788] RDX: 0000000000000003 RSI: 000055dbb64dce20 RDI: 0000000000000001
[  386.703911] RBP: 000055dbb64dce20 R08: 0000000000000000 R09: 00007f4d2cbbe4e0
[  386.704041] R10: 00007f4d2cbbe3e0 R11: 0000000000000246 R12: 0000000000000003


Finger prints:
skb_queue_purge_reason:nsim_destroy:__nsim_dev_port_del:nsim_dev_reload_destroy