======================================
| xx__-> [    1.798393] netdevsim netdevsim1337 eni1337np2: renamed from eth0
| [   71.967320] ------------[ cut here ]------------
| [   71.967420] kernel BUG at net/core/net-sysfs.c:2246!
| [   71.967493] Oops: invalid opcode: 0000 [#1] SMP
[   71.967681] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   71.967752] RIP: 0010:netdev_release (net/core/net-sysfs.c:2246 net/core/net-sysfs.c:2242)
[   71.967824] Code: fa 0f 1f 44 00 00 80 7f e0 04 75 1d 55 48 8d af e0 fa ff ff 48 8b bf 10 fc ff ff e8 6d 99 a6 ff 48 89 ef 5d e9 24 a0 a6 ff 90 <0f> 0b 90 f3 0f 1e fa 0f 1f 44 00 00 55 48 89 f5 48 8d 97 f8 fb ff
All code
========
   0:	fa                   	cli
   1:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   6:	80 7f e0 04          	cmpb   $0x4,-0x20(%rdi)
   a:	75 1d                	jne    0x29
   c:	55                   	push   %rbp
   d:	48 8d af e0 fa ff ff 	lea    -0x520(%rdi),%rbp
  14:	48 8b bf 10 fc ff ff 	mov    -0x3f0(%rdi),%rdi
  1b:	e8 6d 99 a6 ff       	call   0xffffffffffa6998d
  20:	48 89 ef             	mov    %rbp,%rdi
  23:	5d                   	pop    %rbp
  24:	e9 24 a0 a6 ff       	jmp    0xffffffffffa6a04d
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	f3 0f 1e fa          	endbr64
  31:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  36:	55                   	push   %rbp
  37:	48 89 f5             	mov    %rsi,%rbp
  3a:	48                   	rex.W
  3b:	8d                   	.byte 0x8d
  3c:	97                   	xchg   %eax,%edi
  3d:	f8                   	clc
  3e:	fb                   	sti
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	f3 0f 1e fa          	endbr64
   7:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   c:	55                   	push   %rbp
   d:	48 89 f5             	mov    %rsi,%rbp
  10:	48                   	rex.W
  11:	8d                   	.byte 0x8d
  12:	97                   	xchg   %eax,%edi
  13:	f8                   	clc
  14:	fb                   	sti
  15:	ff                   	.byte 0xff
[   71.968016] RSP: 0018:ffffa1da80597ce0 EFLAGS: 00010297
[   71.968079] RAX: ffffffff9a930c30 RBX: 00000000ffffffff RCX: 000000000000000a
[   71.968161] RDX: 0000000000000008 RSI: ffffffff9a74f524 RDI: ffff8ca8013bc520
[   71.968243] RBP: ffff8ca8013bc520 R08: 0000000000000000 R09: 00000000000001ec
[   71.968334] R10: 0000000000000400 R11: 00000000000001f0 R12: ffff8ca801ad5e00
[   71.968415] R13: ffffffff9acb1420 R14: ffff8ca802e4e980 R15: ffff8ca8013bc000
[   71.968502] FS:  00007f4ef36b7000(0000) GS:ffff8ca8a3259000(0000) knlGS:0000000000000000
[   71.968591] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   71.968667] CR2: 00007f4ef3869f73 CR3: 00000000051a1004 CR4: 0000000000772ef0
[   71.968750] PKRU: 55555554
[   71.968776] Call Trace:
[   71.968808]  <TASK>
[   71.968841]  device_release (drivers/base/core.c:2569)
[   71.968901]  kobject_put (lib/kobject.c:693 lib/kobject.c:720 ./include/linux/kref.h:65 lib/kobject.c:737)
[   71.968957]  netdev_run_todo (./include/linux/list.h:381 net/core/dev.c:11670)
[   71.969007] nsim_destroy (drivers/net/netdevsim/netdevsim.h:396 drivers/net/netdevsim/netdev.c:1186) netdevsim
[   71.969079] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:441 drivers/net/netdevsim/dev.c:1474) netdevsim
[   71.969148] nsim_drv_port_del (drivers/net/netdevsim/dev.c:1770) netdevsim
[   71.969211] del_port_store (drivers/net/netdevsim/bus.c:118) netdevsim
[   71.969274]  kernfs_fop_write_iter (fs/kernfs/file.c:88 fs/kernfs/file.c:356)
[   71.969338]  vfs_write (fs/read_write.c:594 fs/read_write.c:686)
[   71.969388]  ksys_write (fs/read_write.c:738)
[   71.969436]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   71.969487]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   71.969550] RIP: 0033:0x7f4ef37b7257
[   71.969593] Code: 0f 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:	0f 00                	(bad)
   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
[   71.969795] RSP: 002b:00007ffdf66cd448 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   71.969878] RAX: ffffffffffffffda RBX: 00007f4ef38b3780 RCX: 00007f4ef37b7257
[   71.969963] RDX: 0000000000000002 RSI: 000055c88f6e78d0 RDI: 0000000000000001
[   71.970047] RBP: 0000000000000002 R08: 0000000000000000 R09: 00007f4ef3869d20
[   71.970130] R10: 00007f4ef3869c20 R11: 0000000000000246 R12: 0000000000000002


Finger prints:
netdev_release:device_release:kobject_put:netdev_run_todo:nsim_destroy