======================================
| xx__-> [    2.377250] ------------[ cut here ]------------
| [    2.377297] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/157
| [    2.377440] Modules linked in:
| [    2.377627] Tainted: [W]=WARN
[    2.377791] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.377927] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.377991] 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
[    2.378042] RSP: 0018:ff7439b9803dfcc8 EFLAGS: 00010286
[    2.378201] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.378290] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48d0b6c1deb800
[    2.378401] RBP: 0000000000000000 R08: ff48d0b6c310e550 R09: ff48d0b6c4a5302c
[    2.378430] R10: ff48d0b6c19be118 R11: fefefefefefefeff R12: 0000000000000000
[    2.378576] R13: 0000000000000010 R14: ff48d0b6c19be000 R15: ff48d0b6c1deb800
[    2.378737] FS:  00007fa39780f740(0000) GS:ff48d0b747016000(0000) knlGS:0000000000000000
[    2.378965] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.378999] CR2: 0000560393b9c310 CR3: 00000000048c8004 CR4: 0000000000771ef0
[    2.379096] PKRU: 55555554
[    2.379223] Call Trace:
[    2.379242]  <TASK>
[    2.379252]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.379375]  register_netdevice (net/core/dev.c:11488)
[    2.379498]  register_netdev (net/core/dev.c:11552)
[    2.379571]  loopback_net_init (drivers/net/loopback.c:218)
[    2.379587]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.379728]  ops_init (net/core/net_namespace.c:137)
[    2.379869]  setup_net (net/core/net_namespace.c:446)
[    2.379888]  copy_net_ns (net/core/net_namespace.c:579)
[    2.379993]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.380050]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.380138]  ksys_unshare (kernel/fork.c:3243)
[    2.380259]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.380314]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.380399]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.380461] RIP: 0033:0x7fa39790abcb
[    2.380550] 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
[    2.380678] RSP: 002b:00007ffc9449d578 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.380824] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa39790abcb
[    2.380972] RDX: 0000000000000000 RSI: 00007ffc9449d2e0 RDI: 0000000040000000
[    2.380993] RBP: 00007ffc9449d900 R08: 00007ffc9449d4d0 R09: 0000000000000000
[    2.381104] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.381125] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000560393b9fb68
| [    2.385321] ------------[ cut here ]------------
| [    2.385352] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/157
| [    2.385415] Modules linked in:
| [    2.385588] Tainted: [W]=WARN
[    2.385725] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.385858] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.385933] 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
[    2.385986] RSP: 0018:ff7439b9803dfd68 EFLAGS: 00010286
[    2.386159] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.386267] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48d0b6c1deb800
[    2.386290] RBP: 0000000000000000 R08: ff48d0b6c19169d0 R09: ff48d0b6c4a50030
[    2.386392] R10: ff48d0b6c4980118 R11: fefefefefefefeff R12: 0000000000000000
[    2.386520] R13: 0000000000000010 R14: ff48d0b6c4980000 R15: ff48d0b6c1deb800
[    2.386646] FS:  000000003072f400(0000) GS:ff48d0b747016000(0000) knlGS:0000000000000000
[    2.386857] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.386959] CR2: 00007f9314d66000 CR3: 0000000004a15005 CR4: 0000000000771ef0
[    2.386982] PKRU: 55555554
[    2.387096] Call Trace:
[    2.387113]  <TASK>
[    2.387171]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.387186]  register_netdevice (net/core/dev.c:11488)
[    2.387284]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.387343]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.387409]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.387435]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.387572]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.387594] RIP: 0033:0x47cc8d
[    2.387687] 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 
[    2.387820] RSP: 002b:00007fffa07a0ca0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.388024] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.388051] RDX: 00007fffa07a0d20 RSI: 00000000400454ca RDI: 0000000000000005
[    2.388153] RBP: 00007fffa07a0cf0 R08: 0000000000000000 R09: 0000000000000000
[    2.388279] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffa07a11f8
[    2.388300] R13: 00007fffa07a1278 R14: 0000000000000002 R15: 0000000000543540
| [    2.388580] ------------[ cut here ]------------
| [    2.388788] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/157
| [    2.388941] Modules linked in:
| [    2.389063] Tainted: [W]=WARN
[    2.389175] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.389198] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.389309] 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
[    2.389361] RSP: 0018:ff7439b9803dfd60 EFLAGS: 00010286
[    2.389491] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.389517] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48d0b6c1deb800
[    2.389643] RBP: 0000000000000002 R08: ff48d0b6c19169d0 R09: ff48d0b6c4a50030
[    2.389669] R10: ff48d0b6c4980118 R11: fefefefefefefeff R12: 0000000000000000
[    2.389818] R13: 0000000000000010 R14: ff48d0b6c4980000 R15: ff48d0b6c1deb800
[    2.389841] FS:  000000003072f400(0000) GS:ff48d0b747016000(0000) knlGS:0000000000000000
[    2.389969] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.390162] CR2: 00007f9314d66000 CR3: 0000000004a15005 CR4: 0000000000771ef0
[    2.390191] PKRU: 55555554
[    2.390295] Call Trace:
[    2.390310]  <TASK>
[    2.390322]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.390405]  notifier_call_chain (kernel/notifier.c:85)
[    2.390465]  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)
[    2.390553]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.390568]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.390761]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.390807]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.390887]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.390967] RIP: 0033:0x47cc8d
[    2.390981] 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 
[    2.391118] RSP: 002b:00007fffa07a0ce0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.391273] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.391294] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.391406] RBP: 00007fffa07a0d30 R08: 0000000000000000 R09: 0000000000000000
[    2.391434] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffa07a11f8
[    2.391562] R13: 00007fffa07a1278 R14: 0000000000000002 R15: 0000000000543540
| [    2.391765] ------------[ cut here ]------------
| [    2.391855] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/157
| [    2.391883] Modules linked in:
| [    2.392025] Tainted: [W]=WARN
[    2.392133] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.392161] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.392274] 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
[    2.392324] RSP: 0018:ff7439b9803dfc10 EFLAGS: 00010286
[    2.392452] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.392646] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48d0b6c1deb800
[    2.392782] RBP: 0000000000000000 R08: ff48d0b6c19169d0 R09: ff48d0b6c4a55030
[    2.392809] R10: ff48d0b6c4980118 R11: fefefefefefefeff R12: 0000000000000000
[    2.393017] R13: 0000000000000010 R14: ff48d0b6c4980000 R15: ff48d0b6c1deb800
[    2.393046] FS:  000000003072f400(0000) GS:ff48d0b747016000(0000) knlGS:0000000000000000
[    2.393144] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.393263] CR2: 00007f9314d66000 CR3: 0000000004a15005 CR4: 0000000000771ef0
[    2.393287] PKRU: 55555554
[    2.393414] Call Trace:
[    2.393447]  <TASK>
[    2.393457]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.393496]  __dev_notify_flags (net/core/dev.c:9787)
[    2.393510]  netif_change_flags (net/core/dev.c:9820)
[    2.393536]  dev_change_flags (net/core/dev_api.c:68)
[    2.393557]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.393572]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.393586]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.393601]  sock_do_ioctl (net/socket.c:1313)
[    2.393617]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.393633]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.393647]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.393673] RIP: 0033:0x47cc8d
[    2.393689] 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 
[    2.393747] RSP: 002b:00007fffa07a0cc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.393772] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.393795] RDX: 00007fffa07a0d30 RSI: 0000000000008914 RDI: 0000000000000006
[    2.393817] RBP: 00007fffa07a0d10 R08: 0000000000000000 R09: 0000000000000000
[    2.393844] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffa07a11f8
[    2.393868] R13: 00007fffa07a1278 R14: 0000000000000002 R15: 0000000000543540
| [   47.331916] ------------[ cut here ]------------
| [   47.331987] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/157
| [   47.332032] Modules linked in:
| [   47.332085] Tainted: [W]=WARN
[   47.332101] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.332123] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.332140] 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
[   47.332203] RSP: 0018:ff7439b9803dfb58 EFLAGS: 00010286
[   47.332222] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.332248] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48d0b6c18f1700
[   47.332269] RBP: 0000000000000000 R08: ff48d0b6c19169d0 R09: ff48d0b6c4a55030
[   47.332292] R10: ff48d0b6c4980118 R11: fefefefefefefeff R12: 0000000000000000
[   47.332314] R13: 0000000000000010 R14: ff48d0b6c4980000 R15: ff48d0b6c18f1700
[   47.332341] FS:  0000000000000000(0000) GS:ff48d0b747016000(0000) knlGS:0000000000000000
[   47.332368] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.332387] CR2: 00007f9314d66000 CR3: 000000000197f006 CR4: 0000000000771ef0
[   47.332416] PKRU: 55555554
[   47.332426] Call Trace:
[   47.332440]  <TASK>
[   47.332449]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.332465]  netif_close_many (net/core/dev.c:1804)
[   47.332479]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.332498]  ? __queue_work (kernel/workqueue.c:2401)
[   47.332514]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.332533]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.332552]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.332566]  __fput (fs/file_table.c:510)
[   47.332582]  task_work_run (kernel/task_work.c:233)
[   47.332599]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.332613]  ? netlink_dump (net/netlink/af_netlink.c:2378)
[   47.332630]  do_group_exit (kernel/exit.c:1119)
[   47.332643]  get_signal (kernel/signal.c:3037)
[   47.332658]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.332844]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.332867]  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)
[   47.332883]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.332902] RIP: 0033:0x4c2d9e
[   47.332916] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.332938] RSP: 002b:00007fffa07a0650 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.332965] RAX: 0000000000000050 RBX: 00007fffa07a06e0 RCX: 00000000004c2d9e
[   47.332989] RDX: 0000000000000000 RSI: 00007fffa07a06f0 RDI: 0000000000000007
[   47.333014] RBP: 00007fffa07a0660 R08: 0000000000000000 R09: 0000000000000000
[   47.333039] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffa07a06d4
[   47.333060] R13: 00007fffa07a1278 R14: 00007fffa07a0820 R15: 0000000000543540
| [   47.333198] ------------[ cut here ]------------
| [   47.333223] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/157
| [   47.333253] Modules linked in:
| [   47.333298] Tainted: [W]=WARN
[   47.333310] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.333332] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.333382] 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
[   47.333436] RSP: 0018:ff7439b9803dfbc8 EFLAGS: 00010286
[   47.333487] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.333515] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48d0b6c18f1600
[   47.333537] RBP: 0000000000000000 R08: ff48d0b6c19169d0 R09: ff48d0b6c2f24830
[   47.333565] R10: ff48d0b6c4980118 R11: fefefefefefefeff R12: 0000000000000000
[   47.333590] R13: 0000000000000011 R14: ff48d0b6c4980000 R15: ff48d0b6c18f1600
[   47.333620] FS:  0000000000000000(0000) GS:ff48d0b746e96000(0000) knlGS:0000000000000000
[   47.333646] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.333674] CR2: 000056028c50bc60 CR3: 000000001a242006 CR4: 0000000000771ef0
[   47.333697] PKRU: 55555554
[   47.333707] Call Trace:
[   47.333716]  <TASK>
[   47.333725]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.333741]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.333757]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.333772]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.333795]  __fput (fs/file_table.c:510)
[   47.333809]  task_work_run (kernel/task_work.c:233)
[   47.333824]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.333837]  ? netlink_dump (net/netlink/af_netlink.c:2378)
[   47.333850]  do_group_exit (kernel/exit.c:1119)
[   47.333862]  get_signal (kernel/signal.c:3037)
[   47.333875]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.333892]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.333910]  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)
[   47.333923]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.333943] RIP: 0033:0x4c2d9e
[   47.333955] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.333976] RSP: 002b:00007fffa07a0650 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.334001] RAX: 0000000000000050 RBX: 00007fffa07a06e0 RCX: 00000000004c2d9e
[   47.334027] RDX: 0000000000000000 RSI: 00007fffa07a06f0 RDI: 0000000000000007
[   47.334048] RBP: 00007fffa07a0660 R08: 0000000000000000 R09: 0000000000000000
[   47.334074] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffa07a06d4
[   47.334095] R13: 00007fffa07a1278 R14: 00007fffa07a0820 R15: 0000000000543540
| [   47.341818] ------------[ cut here ]------------
| [   47.341852] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 1/65
| [   47.341920] Modules linked in:
| [   47.341992] Tainted: [W]=WARN
[   47.342006] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.342026] Workqueue: netns cleanup_net
[   47.342043] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.342063] 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
[   47.342137] RSP: 0018:ff7439b98023fc78 EFLAGS: 00010286
[   47.342156] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.342182] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48d0b6c18f1600
[   47.342202] RBP: 0000000000000000 R08: ff48d0b6c310e550 R09: ff48d0b6c4a4a82c
[   47.342231] R10: ff48d0b6c19be118 R11: fefefefefefefeff R12: 0000000000000000
[   47.342252] R13: 0000000000000011 R14: ff48d0b6c19be000 R15: ff48d0b6c18f1600
[   47.342280] FS:  0000000000000000(0000) GS:ff48d0b746e96000(0000) knlGS:0000000000000000
[   47.342306] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.342327] CR2: 00007f2b4f1e3f98 CR3: 000000001a242006 CR4: 0000000000771ef0
[   47.342352] PKRU: 55555554
[   47.342361] Call Trace:
[   47.342368]  <TASK>
[   47.342378]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.342396]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.342413]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.342427]  cleanup_net (net/core/net_namespace.c:702)
[   47.342439]  process_one_work (kernel/workqueue.c:3314)
[   47.342472]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.342487]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.342510]  kthread (kernel/kthread.c:436)
[   47.342549]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.342562]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.342575]  ? 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