======================================
| xx__-> [    2.312051] ------------[ cut here ]------------
| [    2.312110] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: bash/162
| [    2.312171] Modules linked in: netdevsim
| [    2.312259] Tainted: [W]=WARN
[    2.312283] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.312324] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.312355] Code: 80 00 00 00 e8 09 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 56 a6 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	09 d9                	or     %ebx,%ecx
   7:	ff                   	(bad)
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 56 a6 fb ff       	call   0xfffffffffffba692
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 56 a6 fb ff       	call   0xfffffffffffba668
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.312455] RSP: 0018:ff84703a803bf9d0 EFLAGS: 00010286
[    2.312484] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.312530] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff42ea0783102c00
[    2.312573] RBP: 0000000000000000 R08: ff42ea078310af50 R09: ff42ea0781efd030
[    2.312613] R10: ff42ea078198a118 R11: fefefefefefefeff R12: 0000000000000000
[    2.312655] R13: 0000000000000010 R14: ff42ea078198a000 R15: ff42ea0783102c00
[    2.312707] FS:  00007f220ac67b80(0000) GS:ff42ea0822eda000(0000) knlGS:0000000000000000
[    2.312753] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.312790] CR2: 0000561a2d881218 CR3: 000000000487d002 CR4: 0000000000771ef0
[    2.312833] PKRU: 55555554
[    2.312849] Call Trace:
[    2.312864]  <TASK>
[    2.312880]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.312903]  register_netdevice (net/core/dev.c:11488)
[    2.312927] nsim_create (drivers/net/netdevsim/netdev.c:1069 drivers/net/netdevsim/netdev.c:1151) netdevsim
[    2.312957] __nsim_dev_port_add (drivers/net/netdevsim/dev.c:1509) netdevsim
[    2.312982] nsim_drv_probe (drivers/net/netdevsim/dev.c:1570 drivers/net/netdevsim/dev.c:1731) netdevsim
[    2.313010]  really_probe (drivers/base/dd.c:631 drivers/base/dd.c:709)
[    2.313036]  ? driver_probe_device (./include/linux/list.h:164 (discriminator 3))
[    2.313063]  __driver_probe_device (drivers/base/dd.c:871)
[    2.313094]  driver_probe_device (drivers/base/dd.c:901)
[    2.313117]  __device_attach_driver (drivers/base/dd.c:1029)
[    2.313145]  bus_for_each_drv (drivers/base/bus.c:500)
[    2.313169]  __device_attach (drivers/base/dd.c:1101)
[    2.313192]  device_initial_probe (drivers/base/dd.c:1156)
[    2.313215]  bus_probe_device (drivers/base/bus.c:613)
[    2.313236]  device_add (drivers/base/core.c:3706)
[    2.313259] new_device_store (drivers/net/netdevsim/bus.c:471 drivers/net/netdevsim/bus.c:191) netdevsim
[    2.313286]  kernfs_fop_write_iter (fs/kernfs/file.c:352)
[    2.313316]  vfs_write (fs/read_write.c:595 fs/read_write.c:688)
[    2.313342]  ksys_write (fs/read_write.c:740)
[    2.313363]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.313389]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.313416] RIP: 0033:0x7f220acd908e
[    2.313438] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 94 bd 00 00       	call   0xbd9c
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[    2.313541] RSP: 002b:00007ffd0430a320 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[    2.313583] RAX: ffffffffffffffda RBX: 00007f220ae5b580 RCX: 00007f220acd908e
[    2.313624] RDX: 0000000000000004 RSI: 0000561a2d880210 RDI: 0000000000000001
[    2.313672] RBP: 00007ffd0430a330 R08: 0000000000000000 R09: 0000000000000000
[    2.313719] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004
[    2.313764] R13: 0000000000000004 R14: 0000561a2d880210 R15: 0000000000000000
| [    2.356737] ------------[ cut here ]------------
| [    2.356838] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: bash/161
| [    2.356958] Modules linked in: netdevsim
| [    2.357137] Tainted: [W]=WARN
[    2.357199] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.357276] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.357349] Code: 80 00 00 00 e8 09 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 56 a6 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	09 d9                	or     %ebx,%ecx
   7:	ff                   	(bad)
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 56 a6 fb ff       	call   0xfffffffffffba692
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 56 a6 fb ff       	call   0xfffffffffffba668
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.357503] RSP: 0018:ff84703a803a7b88 EFLAGS: 00010286
[    2.357575] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.357663] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff42ea0782fdb700
[    2.357758] RBP: 0000000000000000 R08: ff42ea078310af50 R09: ff42ea078304f030
[    2.357843] R10: ff42ea078198a118 R11: fefefefefefefeff R12: 0000000000000000
[    2.357929] R13: 0000000000000011 R14: ff42ea078198a000 R15: ff42ea0782fdb700
[    2.358029] FS:  00007f220ac67b80(0000) GS:ff42ea0822f5a000(0000) knlGS:0000000000000000
[    2.358122] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.358192] CR2: 0000561a2d884138 CR3: 00000000032fe002 CR4: 0000000000771ef0
[    2.358271] PKRU: 55555554
[    2.358320] Call Trace:
[    2.358369]  <TASK>
[    2.358418]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[    2.358484]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[    2.358554] nsim_destroy (./include/linux/netdevice.h:3455 drivers/net/netdevsim/netdev.c:1193) netdevsim
[    2.358620] __nsim_dev_port_del (drivers/net/netdevsim/dev.c:1547) netdevsim
[    2.358694] nsim_dev_reload_destroy (drivers/net/netdevsim/dev.c:1561 drivers/net/netdevsim/dev.c:1785) netdevsim
[    2.358760] nsim_drv_remove (drivers/net/netdevsim/dev.c:1800) netdevsim
[    2.358831]  device_release_driver_internal (drivers/base/dd.c:1352 drivers/base/dd.c:1375)
[    2.358896]  bus_remove_device (drivers/base/bus.c:657)
[    2.358954]  ? device_remove_attrs (drivers/base/core.c:2844 drivers/base/core.c:2977)
[    2.359019]  device_del (drivers/base/core.c:3895)
[    2.359077]  device_unregister (drivers/base/core.c:3936)
[    2.359135] del_device_store (drivers/net/netdevsim/bus.c:491 drivers/net/netdevsim/bus.c:244) netdevsim
[    2.359201]  kernfs_fop_write_iter (fs/kernfs/file.c:352)
[    2.359267]  vfs_write (fs/read_write.c:595 fs/read_write.c:688)
[    2.359327]  ksys_write (fs/read_write.c:740)
[    2.359385]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.359445]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.359509] RIP: 0033:0x7f220acd908e
[    2.359573] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 94 bd 00 00       	call   0xbd9c
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[    2.359711] RSP: 002b:00007ffd0430a680 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[    2.359791] RAX: ffffffffffffffda RBX: 00007f220ae5b580 RCX: 00007f220acd908e
[    2.359867] RDX: 0000000000000004 RSI: 0000561a2d883130 RDI: 0000000000000001
[    2.359945] RBP: 00007ffd0430a690 R08: 0000000000000000 R09: 0000000000000000
[    2.360023] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004


Finger prints:
rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:unregister_netdevice_queue:nsim_destroy:__nsim_dev_port_del
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:register_netdevice:nsim_create:__nsim_dev_port_add