======================================
| xx__-> [  138.644516] ------------[ cut here ]------------
| [  138.644565] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/291
| [  138.644623] Modules linked in:
| [  138.644704] Tainted: [W]=WARN
[  138.644726] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.644767] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  138.644797] 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
[  138.644881] RSP: 0018:ff60a8d680517cc8 EFLAGS: 00010286
[  138.644909] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.644949] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26e36241dd8e00
[  138.644994] RBP: 0000000000000000 R08: ff26e362432c29d0 R09: ff26e362431e802c
[  138.645033] R10: ff26e362431eb118 R11: fefefefefefefeff R12: 0000000000000000
[  138.645081] R13: 0000000000000010 R14: ff26e362431eb000 R15: ff26e36241dd8e00
[  138.645129] FS:  00007f049a0b9740(0000) GS:ff26e362f5a96000(0000) knlGS:0000000000000000
[  138.645172] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.645212] CR2: 000055ee4584f008 CR3: 00000000032da001 CR4: 0000000000771ef0
[  138.645257] PKRU: 55555554
[  138.645274] Call Trace:
[  138.645291]  <TASK>
[  138.645307]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  138.645329]  register_netdevice (net/core/dev.c:11488)
[  138.645352]  register_netdev (net/core/dev.c:11552)
[  138.645373]  loopback_net_init (drivers/net/loopback.c:218)
[  138.645397]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[  138.645428]  ops_init (net/core/net_namespace.c:137)
[  138.645452]  setup_net (net/core/net_namespace.c:446)
[  138.645475]  copy_net_ns (net/core/net_namespace.c:579)
[  138.645498]  create_new_namespaces (kernel/nsproxy.c:132)
[  138.645524]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[  138.645553]  ksys_unshare (kernel/fork.c:3243)
[  138.645578]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[  138.645603]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  138.645627]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  138.645657] RIP: 0033:0x7f049a1b4bcb
[  138.645681] 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
[  138.645788] RSP: 002b:00007ffd184e9328 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  138.645834] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f049a1b4bcb
[  138.645878] RDX: 0000000000000000 RSI: 00007ffd184e9090 RDI: 0000000040000000
[  138.645917] RBP: 00007ffd184e96b0 R08: 00007ffd184e9280 R09: 0000000000000000
[  138.645957] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  138.646004] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055ee38c35b68
| [  138.646809] ------------[ cut here ]------------
| [  138.646845] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/291
| [  138.646903] Modules linked in:
| [  138.646985] Tainted: [W]=WARN
[  138.647006] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.647039] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  138.647066] 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
[  138.647163] RSP: 0018:ff60a8d680517d68 EFLAGS: 00010286
[  138.647198] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.647240] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26e36241dd8e00
[  138.647281] RBP: 0000000000000000 R08: ff26e36243368650 R09: ff26e36242dc8030
[  138.647324] R10: ff26e36244c2c118 R11: fefefefefefefeff R12: 0000000000000000
[  138.647369] R13: 0000000000000010 R14: ff26e36244c2c000 R15: ff26e36241dd8e00
[  138.647413] FS:  0000000012551400(0000) GS:ff26e362f5a96000(0000) knlGS:0000000000000000
[  138.647458] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.647492] CR2: 00007fdefaa5b000 CR3: 00000000030ac002 CR4: 0000000000771ef0
[  138.647540] PKRU: 55555554
[  138.647555] Call Trace:
[  138.647570]  <TASK>
[  138.647584]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  138.647606]  register_netdevice (net/core/dev.c:11488)
[  138.647627]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[  138.647651]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[  138.647671]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  138.647696]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  138.647721]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  138.647759] RIP: 0033:0x47cc8d
[  138.647780] 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 
[  138.647884] RSP: 002b:00007ffe3889f6c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.647929] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.647971] RDX: 00007ffe3889f740 RSI: 00000000400454ca RDI: 0000000000000005
[  138.648016] RBP: 00007ffe3889f710 R08: 0000000000000000 R09: 0000000000000000
[  138.648054] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3889fc18
[  138.648094] R13: 00007ffe3889fc98 R14: 0000000000000002 R15: 0000000000543540
| [  138.648202] ------------[ cut here ]------------
| [  138.648229] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/291
| [  138.648276] Modules linked in:
| [  138.648354] Tainted: [W]=WARN
[  138.648374] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.648406] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  138.648432] 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
[  138.648532] RSP: 0018:ff60a8d680517d60 EFLAGS: 00010286
[  138.648562] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  138.648602] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26e36241dd8e00
[  138.648646] RBP: 0000000000000002 R08: ff26e36243368650 R09: ff26e36242dc8030
[  138.648685] R10: ff26e36244c2c118 R11: fefefefefefefeff R12: 0000000000000000
[  138.648728] R13: 0000000000000010 R14: ff26e36244c2c000 R15: ff26e36241dd8e00
[  138.648775] FS:  0000000012551400(0000) GS:ff26e362f5a96000(0000) knlGS:0000000000000000
[  138.648817] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.648849] CR2: 00007fdefaa5b000 CR3: 00000000030ac002 CR4: 0000000000771ef0
[  138.648884] PKRU: 55555554
[  138.648904] Call Trace:
[  138.648917]  <TASK>
[  138.648934]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[  138.648956]  notifier_call_chain (kernel/notifier.c:85)
[  138.648981]  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)
[  138.649015]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[  138.649037]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[  138.649061]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  138.649084]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  138.649105]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  138.649133] RIP: 0033:0x47cc8d
[  138.649153] 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 
[  138.649255] RSP: 002b:00007ffe3889f700 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.649300] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.649342] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  138.649384] RBP: 00007ffe3889f750 R08: 0000000000000000 R09: 0000000000000000
[  138.649433] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3889fc18
[  138.649479] R13: 00007ffe3889fc98 R14: 0000000000000002 R15: 0000000000543540
| [  138.649577] ------------[ cut here ]------------
| [  138.649603] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/291
| [  138.649656] Modules linked in:
| [  138.649735] Tainted: [W]=WARN
[  138.649761] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.649795] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  138.649823] 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
[  138.649917] RSP: 0018:ff60a8d680517c10 EFLAGS: 00010286
[  138.649944] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  138.649985] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26e36241dd8e00
[  138.650025] RBP: 0000000000000000 R08: ff26e36243368650 R09: ff26e362431ef030
[  138.650064] R10: ff26e36244c2c118 R11: fefefefefefefeff R12: 0000000000000000
[  138.650106] R13: 0000000000000010 R14: ff26e36244c2c000 R15: ff26e36241dd8e00
[  138.650157] FS:  0000000012551400(0000) GS:ff26e362f5a96000(0000) knlGS:0000000000000000
[  138.650202] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.650239] CR2: 00007fdefaa5b000 CR3: 00000000030ac002 CR4: 0000000000771ef0
[  138.650280] PKRU: 55555554
[  138.650293] Call Trace:
[  138.650306]  <TASK>
[  138.650320]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  138.650341]  __dev_notify_flags (net/core/dev.c:9787)
[  138.650363]  netif_change_flags (net/core/dev.c:9820)
[  138.650383]  dev_change_flags (net/core/dev_api.c:68)
[  138.650404]  devinet_ioctl (net/ipv4/devinet.c:1199)
[  138.650430]  inet_ioctl (net/ipv4/af_inet.c:1011)
[  138.650452]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[  138.650474]  sock_do_ioctl (net/socket.c:1313)
[  138.650498]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  138.650520]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  138.650539]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  138.650568] RIP: 0033:0x47cc8d
[  138.650589] 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 
[  138.650693] RSP: 002b:00007ffe3889f6e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.650732] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.650782] RDX: 00007ffe3889f750 RSI: 0000000000008914 RDI: 0000000000000006
[  138.650822] RBP: 00007ffe3889f730 R08: 0000000000000000 R09: 0000000000000000
[  138.650862] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3889fc18
[  138.650903] R13: 00007ffe3889fc98 R14: 0000000000000002 R15: 0000000000543540
| [  183.629417] ------------[ cut here ]------------
| [  183.629484] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/291
| [  183.629553] Modules linked in:
| [  183.629642] Tainted: [W]=WARN
[  183.629667] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.629707] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  183.629736] 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
[  183.629849] RSP: 0018:ff60a8d680517b58 EFLAGS: 00010286
[  183.629883] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  183.629930] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26e36241c3fd00
[  183.629980] RBP: 0000000000000000 R08: ff26e36243368650 R09: ff26e36241e7c030
[  183.630026] R10: ff26e36244c2c118 R11: fefefefefefefeff R12: 0000000000000000
[  183.630077] R13: 0000000000000010 R14: ff26e36244c2c000 R15: ff26e36241c3fd00
[  183.630131] FS:  0000000000000000(0000) GS:ff26e362f5a96000(0000) knlGS:0000000000000000
[  183.630182] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.630221] CR2: 00007fdefaa5b000 CR3: 000000003e242003 CR4: 0000000000771ef0
[  183.630275] PKRU: 55555554
[  183.630289] Call Trace:
[  183.630306]  <TASK>
[  183.630322]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  183.630357]  netif_close_many (net/core/dev.c:1804)
[  183.630381]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[  183.630412]  ? __queue_work (kernel/workqueue.c:2401)
[  183.630440]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  183.630472]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  183.630500]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  183.630520]  __fput (fs/file_table.c:510)
[  183.630547]  task_work_run (kernel/task_work.c:233)
[  183.630569]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  183.630593]  ? sysvec_reschedule_ipi (./arch/x86/include/asm/apic.h:410 (discriminator 1) arch/x86/kernel/smp.c:251 (discriminator 1) arch/x86/kernel/smp.c:249 (discriminator 1) arch/x86/kernel/smp.c:249 (discriminator 1))
[  183.630623]  do_group_exit (kernel/exit.c:1119)
[  183.630649]  get_signal (kernel/signal.c:3037)
[  183.630672]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  183.630706]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  183.630739]  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)
[  183.630760]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  183.630792] RIP: 0033:0x4c2d9e
[  183.630816] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[  183.630852] RSP: 002b:00007ffe3889f070 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  183.630897] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  183.630943] RDX: 0000000000000014 RSI: 00007ffe3889f150 RDI: 0000000000000007
[  183.630991] RBP: 00007ffe3889f080 R08: 00007ffe3889f110 R09: 000000000000000c
[  183.631032] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe3889fc18
[  183.631076] R13: 00007ffe3889fc98 R14: 00007ffe3889f240 R15: 0000000000543540
| [  183.631276] ------------[ cut here ]------------
| [  183.631316] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: packetdrill/291
| [  183.631370] Modules linked in:
| [  183.631448] Tainted: [W]=WARN
[  183.631468] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.631502] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  183.631535] 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
[  183.631633] RSP: 0018:ff60a8d680517bc8 EFLAGS: 00010286
[  183.631664] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.631703] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26e36241dd8f00
[  183.631736] RBP: 0000000000000000 R08: ff26e36243368650 R09: ff26e3624713f030
[  183.631777] R10: ff26e36244c2c118 R11: fefefefefefefeff R12: 0000000000000000
[  183.631817] R13: 0000000000000011 R14: ff26e36244c2c000 R15: ff26e36241dd8f00
[  183.631864] FS:  0000000000000000(0000) GS:ff26e362f5b16000(0000) knlGS:0000000000000000
[  183.631899] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.631935] CR2: 00007fed897bb9dc CR3: 000000003e242005 CR4: 0000000000771ef0
[  183.631981] PKRU: 55555554
[  183.631996] Call Trace:
[  183.632010]  <TASK>
[  183.632022]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  183.632053]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  183.632080]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  183.632105]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  183.632133]  __fput (fs/file_table.c:510)
[  183.632158]  task_work_run (kernel/task_work.c:233)
[  183.632188]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  183.632211]  ? sysvec_reschedule_ipi (./arch/x86/include/asm/apic.h:410 (discriminator 1) arch/x86/kernel/smp.c:251 (discriminator 1) arch/x86/kernel/smp.c:249 (discriminator 1) arch/x86/kernel/smp.c:249 (discriminator 1))
[  183.632242]  do_group_exit (kernel/exit.c:1119)
[  183.632263]  get_signal (kernel/signal.c:3037)
[  183.632290]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  183.632321]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  183.632352]  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)
[  183.632376]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  183.632404] RIP: 0033:0x4c2d9e
[  183.632423] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[  183.632448] RSP: 002b:00007ffe3889f070 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  183.632491] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  183.632535] RDX: 0000000000000014 RSI: 00007ffe3889f150 RDI: 0000000000000007
[  183.632575] RBP: 00007ffe3889f080 R08: 00007ffe3889f110 R09: 000000000000000c
[  183.632617] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe3889fc18
[  183.632657] R13: 00007ffe3889fc98 R14: 00007ffe3889f240 R15: 0000000000543540
| [  183.649293] ------------[ cut here ]------------
| [  183.649330] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: 1/64
| [  183.649400] Modules linked in:
| [  183.649481] Tainted: [W]=WARN
[  183.649501] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.649537] Workqueue: netns cleanup_net
[  183.649560] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  183.649589] 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
[  183.649685] RSP: 0018:ff60a8d680237c78 EFLAGS: 00010286
[  183.649713] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.649755] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26e36241c3fc00
[  183.649795] RBP: 0000000000000000 R08: ff26e362432c29d0 R09: ff26e3624732402c
[  183.649836] R10: ff26e362431eb118 R11: fefefefefefefeff R12: 0000000000000000
[  183.649875] R13: 0000000000000011 R14: ff26e362431eb000 R15: ff26e36241c3fc00
[  183.649916] FS:  0000000000000000(0000) GS:ff26e362f5c16000(0000) knlGS:0000000000000000
[  183.649962] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.649992] CR2: 00007f3f46d6e770 CR3: 000000003e242005 CR4: 0000000000771ef0
[  183.650033] PKRU: 55555554
[  183.650048] Call Trace:
[  183.650063]  <TASK>
[  183.650078]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  183.650105]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[  183.650137]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[  183.650158]  cleanup_net (net/core/net_namespace.c:702)
[  183.650183]  process_one_work (kernel/workqueue.c:3314)
[  183.650204]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[  183.650229]  ? rescuer_thread (kernel/workqueue.c:3672)
[  183.650250]  kthread (kernel/kthread.c:436)
[  183.650270]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[  183.650291]  ret_from_fork (arch/x86/kernel/process.c:158)
[  183.650315]  ? 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