======================================
| xx__-> [    2.210355] ------------[ cut here ]------------
| [    2.210417] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/159
| [    2.210518] Modules linked in:
| [    2.210625] Tainted: [W]=WARN
[    2.210648] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.210696] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.210744] Code: 80 00 00 00 e8 59 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 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   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 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.210856] RSP: 0018:ff762bc640263cc8 EFLAGS: 00010286
[    2.210898] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.210939] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e33e341d79b00
[    2.210979] RBP: 0000000000000000 R08: ff2e33e342e52d10 R09: ff2e33e344f5a02c
[    2.211026] R10: ff2e33e344c5d118 R11: fefefefefefefeff R12: 0000000000000000
[    2.211065] R13: 0000000000000010 R14: ff2e33e344c5d000 R15: ff2e33e341d79b00
[    2.211110] FS:  00007fa3f4b59740(0000) GS:ff2e33e3f6816000(0000) knlGS:0000000000000000
[    2.211174] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.211222] CR2: 0000562582137310 CR3: 0000000002df3003 CR4: 0000000000771ef0
[    2.211264] PKRU: 55555554
[    2.211286] Call Trace:
[    2.211301]  <TASK>
[    2.211334]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.211362]  register_netdevice (net/core/dev.c:11488)
[    2.211386]  register_netdev (net/core/dev.c:11552)
[    2.211406]  loopback_net_init (drivers/net/loopback.c:218)
[    2.211436]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.211473]  ops_init (net/core/net_namespace.c:137)
[    2.211497]  setup_net (net/core/net_namespace.c:446)
[    2.211529]  copy_net_ns (net/core/net_namespace.c:579)
[    2.211564]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.211595]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.211630]  ksys_unshare (kernel/fork.c:3243)
[    2.211656]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.211680]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.211705]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.211754] RIP: 0033:0x7fa3f4c54bcb
[    2.211778] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 2d 82 0f 00 	mov    0xf822d(%rip),%rcx        # 0xf8237
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf8237
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf820d
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    2.211875] RSP: 002b:00007ffdc977b3b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.211917] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa3f4c54bcb
[    2.211962] RDX: 0000000000000000 RSI: 00007ffdc977b120 RDI: 0000000040000000
[    2.212004] RBP: 00007ffdc977b740 R08: 00007ffdc977b310 R09: 0000000000000000
[    2.212044] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.212087] R13: 0000000000000000 R14: 00000000ffffffff R15: 000056258213ab68
| [    2.215325] ------------[ cut here ]------------
| [    2.215361] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.215401] Modules linked in:
| [    2.215498] Tainted: [W]=WARN
[    2.215523] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.215563] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.215595] Code: 80 00 00 00 e8 59 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 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   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 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.215698] RSP: 0018:ff762bc640263d68 EFLAGS: 00010286
[    2.215729] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.215776] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e33e341d79b00
[    2.215822] RBP: 0000000000000000 R08: ff2e33e342e6b850 R09: ff2e33e344f5f030
[    2.215863] R10: ff2e33e344e94118 R11: fefefefefefefeff R12: 0000000000000000
[    2.215905] R13: 0000000000000010 R14: ff2e33e344e94000 R15: ff2e33e341d79b00
[    2.215949] FS:  0000000013a05400(0000) GS:ff2e33e3f6816000(0000) knlGS:0000000000000000
[    2.215996] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.216035] CR2: 00007f115c5c9000 CR3: 0000000004f8c004 CR4: 0000000000771ef0
[    2.216077] PKRU: 55555554
[    2.216091] Call Trace:
[    2.216106]  <TASK>
[    2.216122]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.216146]  register_netdevice (net/core/dev.c:11488)
[    2.216168]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.216194]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.216220]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.216244]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.216269]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.216300] RIP: 0033:0x47cc8d
[    2.216322] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    2.216424] RSP: 002b:00007ffec78a79c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.216483] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.216525] RDX: 00007ffec78a7a40 RSI: 00000000400454ca RDI: 0000000000000005
[    2.216565] RBP: 00007ffec78a7a10 R08: 0000000000000000 R09: 0000000000000000
[    2.216606] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec78a7f18
[    2.216651] R13: 00007ffec78a7f98 R14: 0000000000000002 R15: 0000000000543540
| [    2.216749] ------------[ cut here ]------------
| [    2.216776] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.216836] Modules linked in:
| [    2.216915] Tainted: [W]=WARN
[    2.216936] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.216970] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.217000] Code: 80 00 00 00 e8 59 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 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   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 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.217100] RSP: 0018:ff762bc640263d60 EFLAGS: 00010286
[    2.217130] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.217176] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e33e341d79b00
[    2.217226] RBP: 0000000000000002 R08: ff2e33e342e6b850 R09: ff2e33e344f5f030
[    2.217268] R10: ff2e33e344e94118 R11: fefefefefefefeff R12: 0000000000000000
[    2.217316] R13: 0000000000000010 R14: ff2e33e344e94000 R15: ff2e33e341d79b00
[    2.217360] FS:  0000000013a05400(0000) GS:ff2e33e3f6816000(0000) knlGS:0000000000000000
[    2.217405] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.217442] CR2: 00007f115c5c9000 CR3: 0000000004f8c004 CR4: 0000000000771ef0
[    2.217491] PKRU: 55555554
[    2.217504] Call Trace:
[    2.217520]  <TASK>
[    2.217536]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.217560]  notifier_call_chain (kernel/notifier.c:85)
[    2.217579]  netdev_update_features (net/core/dev.c:2287 net/core/dev.c:2301 net/core/dev.c:1590 net/core/dev.c:11099 net/core/dev.c:11096)
[    2.217609]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.217633]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.217657]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.217680]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.217702]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.217729] RIP: 0033:0x47cc8d
[    2.217750] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    2.217851] RSP: 002b:00007ffec78a7a00 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.217890] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.217932] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.217975] RBP: 00007ffec78a7a50 R08: 0000000000000000 R09: 0000000000000000
[    2.218019] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec78a7f18
[    2.218060] R13: 00007ffec78a7f98 R14: 0000000000000002 R15: 0000000000543540
| [    2.218154] ------------[ cut here ]------------
| [    2.218182] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.218228] Modules linked in:
| [    2.218308] Tainted: [W]=WARN
[    2.218329] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.218364] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.218393] Code: 80 00 00 00 e8 59 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 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   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 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.218503] RSP: 0018:ff762bc640263c10 EFLAGS: 00010286
[    2.218527] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.218578] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e33e341d79b00
[    2.218619] RBP: 0000000000000000 R08: ff2e33e342e6b850 R09: ff2e33e344f5c030
[    2.218663] R10: ff2e33e344e94118 R11: fefefefefefefeff R12: 0000000000000000
[    2.218709] R13: 0000000000000010 R14: ff2e33e344e94000 R15: ff2e33e341d79b00
[    2.218753] FS:  0000000013a05400(0000) GS:ff2e33e3f6816000(0000) knlGS:0000000000000000
[    2.218796] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.218837] CR2: 00007f115c5c9000 CR3: 0000000004f8c004 CR4: 0000000000771ef0
[    2.218877] PKRU: 55555554
[    2.218890] Call Trace:
[    2.218904]  <TASK>
[    2.218919]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.218939]  __dev_notify_flags (net/core/dev.c:9787)
[    2.218960]  netif_change_flags (net/core/dev.c:9820)
[    2.218983]  dev_change_flags (net/core/dev_api.c:68)
[    2.219004]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.219024]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.219047]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.219069]  sock_do_ioctl (net/socket.c:1313)
[    2.219089]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.219112]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.219134]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.219157] RIP: 0033:0x47cc8d
[    2.219179] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    2.219275] RSP: 002b:00007ffec78a79e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.219318] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.219358] RDX: 00007ffec78a7a50 RSI: 0000000000008914 RDI: 0000000000000006
[    2.219396] RBP: 00007ffec78a7a30 R08: 0000000000000000 R09: 0000000000000000
[    2.219443] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffec78a7f18
[    2.219490] R13: 00007ffec78a7f98 R14: 0000000000000002 R15: 0000000000543540
| [   47.194606] ------------[ cut here ]------------
| [   47.194711] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [   47.194777] Modules linked in:
| [   47.194867] Tainted: [W]=WARN
[   47.194892] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.194935] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.194964] Code: 80 00 00 00 e8 59 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 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   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 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.195068] RSP: 0018:ff762bc640263b58 EFLAGS: 00010286
[   47.195100] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.195144] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e33e342e1dc00
[   47.195188] RBP: 0000000000000000 R08: ff2e33e342e6b850 R09: ff2e33e344f5c030
[   47.195231] R10: ff2e33e344e94118 R11: fefefefefefefeff R12: 0000000000000000
[   47.195284] R13: 0000000000000010 R14: ff2e33e344e94000 R15: ff2e33e342e1dc00
[   47.195333] FS:  0000000000000000(0000) GS:ff2e33e3f6816000(0000) knlGS:0000000000000000
[   47.195379] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.195411] CR2: 00007f115c5c9000 CR3: 0000000004e3d005 CR4: 0000000000771ef0
[   47.195575] PKRU: 55555554
[   47.195598] Call Trace:
[   47.195616]  <TASK>
[   47.195633]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.195657]  netif_close_many (net/core/dev.c:1804)
[   47.195682]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.195713]  ? __queue_work (kernel/workqueue.c:2401)
[   47.195737]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.195765]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.195792]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.195820]  __fput (fs/file_table.c:510)
[   47.195849]  task_work_run (kernel/task_work.c:233)
[   47.195874]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.195899]  ? netlink_dump (net/netlink/af_netlink.c:2378)
[   47.195927]  do_group_exit (kernel/exit.c:1119)
[   47.195949]  get_signal (kernel/signal.c:3037)
[   47.195973]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.196009]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.196042]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   47.196067]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.196101] RIP: 0033:0x4c2d9e
[   47.196123] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.196161] RSP: 002b:00007ffec78a7370 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.196203] RAX: 0000000000000050 RBX: 00007ffec78a7400 RCX: 00000000004c2d9e
[   47.196248] RDX: 0000000000000000 RSI: 00007ffec78a7410 RDI: 0000000000000007
[   47.196287] RBP: 00007ffec78a7380 R08: 0000000000000000 R09: 0000000000000000
[   47.196328] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffec78a73f4
[   47.196372] R13: 00007ffec78a7f98 R14: 00007ffec78a7540 R15: 0000000000543540
| [   47.196525] ------------[ cut here ]------------
| [   47.196555] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [   47.196621] Modules linked in:
| [   47.196709] Tainted: [W]=WARN
[   47.196731] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.196768] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.196801] Code: 80 00 00 00 e8 59 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 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   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 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.196890] RSP: 0018:ff762bc640263bc8 EFLAGS: 00010286
[   47.196917] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.196958] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e33e342e1dc00
[   47.197003] RBP: 0000000000000000 R08: ff2e33e342e6b850 R09: ff2e33e34328a830
[   47.197047] R10: ff2e33e344e94118 R11: fefefefefefefeff R12: 0000000000000000
[   47.197089] R13: 0000000000000011 R14: ff2e33e344e94000 R15: ff2e33e342e1dc00
[   47.197127] FS:  0000000000000000(0000) GS:ff2e33e3f6816000(0000) knlGS:0000000000000000
[   47.197169] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.197198] CR2: 00007f115c5c9000 CR3: 0000000004e3d005 CR4: 0000000000771ef0
[   47.197242] PKRU: 55555554
[   47.197257] Call Trace:
[   47.197271]  <TASK>
[   47.197286]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.197314]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.197340]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.197363]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.197385]  __fput (fs/file_table.c:510)
[   47.197409]  task_work_run (kernel/task_work.c:233)
[   47.197430]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.197452]  ? netlink_dump (net/netlink/af_netlink.c:2378)
[   47.197481]  do_group_exit (kernel/exit.c:1119)
[   47.197504]  get_signal (kernel/signal.c:3037)
[   47.197526]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.197556]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.197583]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   47.197612]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.197642] RIP: 0033:0x4c2d9e
[   47.197662] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.197700] RSP: 002b:00007ffec78a7370 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.197742] RAX: 0000000000000050 RBX: 00007ffec78a7400 RCX: 00000000004c2d9e
[   47.197782] RDX: 0000000000000000 RSI: 00007ffec78a7410 RDI: 0000000000000007
[   47.197824] RBP: 00007ffec78a7380 R08: 0000000000000000 R09: 0000000000000000
[   47.197869] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffec78a73f4
[   47.197918] R13: 00007ffec78a7f98 R14: 00007ffec78a7540 R15: 0000000000543540
| [   47.207579] ------------[ cut here ]------------
| [   47.207645] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 0/12
| [   47.207712] Modules linked in:
| [   47.207807] Tainted: [W]=WARN
[   47.207831] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.207870] Workqueue: netns cleanup_net
[   47.207896] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.207928] Code: 80 00 00 00 e8 59 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 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   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 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.208034] RSP: 0018:ff762bc640067c78 EFLAGS: 00010286
[   47.208066] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.208108] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e33e342e16f00
[   47.208151] RBP: 0000000000000000 R08: ff2e33e342e52d10 R09: ff2e33e341de302c
[   47.208195] R10: ff2e33e344c5d118 R11: fefefefefefefeff R12: 0000000000000000
[   47.208239] R13: 0000000000000011 R14: ff2e33e344c5d000 R15: ff2e33e342e16f00
[   47.208283] FS:  0000000000000000(0000) GS:ff2e33e3f6696000(0000) knlGS:0000000000000000
[   47.208331] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.208366] CR2: 00007f8c43ceff98 CR3: 000000003ba42002 CR4: 0000000000771ef0
[   47.208407] PKRU: 55555554
[   47.208420] Call Trace:
[   47.208439]  <TASK>
[   47.208456]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.208488]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.208517]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.208541]  cleanup_net (net/core/net_namespace.c:702)
[   47.208565]  process_one_work (kernel/workqueue.c:3314)
[   47.208587]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.208617]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.208640]  kthread (kernel/kthread.c:436)
[   47.208666]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.208684]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.208707]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))


Finger prints:
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:__dev_notify_flags:netif_change_flags:dev_change_flags
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:register_netdevice:register_netdev:loopback_net_init
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:register_netdevice:__tun_chr_ioctl:__x64_sys_ioctl
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:netif_close_many:unregister_netdevice_many_notify:unregister_netdevice_queue
rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:unregister_netdevice_queue:__tun_detach:tun_chr_close
rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:default_device_exit_batch:ops_undo_list:cleanup_net
rtmsg_ifinfo_build_skb:rtnetlink_event:notifier_call_chain:netdev_update_features:__tun_chr_ioctl