======================================
| xx__-> [    2.413880] ------------[ cut here ]------------
| [    2.413932] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/158
| [    2.413991] Modules linked in:
| [    2.414078] Tainted: [W]=WARN
[    2.414102] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.414139] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.414175] 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
[    2.414278] RSP: 0018:ff4d31d2403ffcc8 EFLAGS: 00010286
[    2.414307] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.414351] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3bbf0501c3cc00
[    2.414391] RBP: 0000000000000000 R08: ff3bbf05030fb4d0 R09: ff3bbf050484b02c
[    2.414434] R10: ff3bbf05019be118 R11: fefefefefefefeff R12: 0000000000000000
[    2.414473] R13: 0000000000000010 R14: ff3bbf05019be000 R15: ff3bbf0501c3cc00
[    2.414522] FS:  00007f0599efd740(0000) GS:ff3bbf05b6696000(0000) knlGS:0000000000000000
[    2.414571] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.414609] CR2: 0000561d09282310 CR3: 000000000317f005 CR4: 0000000000771ef0
[    2.414658] PKRU: 55555554
[    2.414673] Call Trace:
[    2.414690]  <TASK>
[    2.414707]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.414731]  register_netdevice (net/core/dev.c:11488)
[    2.414753]  register_netdev (net/core/dev.c:11552)
[    2.414779]  loopback_net_init (drivers/net/loopback.c:218)
[    2.414809]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.414842]  ops_init (net/core/net_namespace.c:137)
[    2.414867]  setup_net (net/core/net_namespace.c:446)
[    2.414890]  copy_net_ns (net/core/net_namespace.c:579)
[    2.414910]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.414937]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.414970]  ksys_unshare (kernel/fork.c:3243)
[    2.414997]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.415019]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.415042]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.415072] RIP: 0033:0x7f0599ff8bcb
[    2.415095] 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
[    2.415195] RSP: 002b:00007ffc993375c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.415238] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0599ff8bcb
[    2.415281] RDX: 0000000000000000 RSI: 00007ffc99337330 RDI: 0000000040000000
[    2.415327] RBP: 00007ffc99337950 R08: 00007ffc99337520 R09: 0000000000000000
[    2.415368] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.415415] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000561d09285b68
| [    2.418753] ------------[ cut here ]------------
| [    2.418790] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/158
| [    2.418851] Modules linked in:
| [    2.418939] Tainted: [W]=WARN
[    2.418961] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.418998] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.419026] 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
[    2.419134] RSP: 0018:ff4d31d2403ffd68 EFLAGS: 00010286
[    2.419165] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.419210] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3bbf0501c3cc00
[    2.419255] RBP: 0000000000000000 R08: ff3bbf0503315c50 R09: ff3bbf0504848030
[    2.419295] R10: ff3bbf05049cc118 R11: fefefefefefefeff R12: 0000000000000000
[    2.419340] R13: 0000000000000010 R14: ff3bbf05049cc000 R15: ff3bbf0501c3cc00
[    2.419389] FS:  0000000001ee2400(0000) GS:ff3bbf05b6696000(0000) knlGS:0000000000000000
[    2.419436] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.419470] CR2: 00007f9a13a93000 CR3: 000000000488b006 CR4: 0000000000771ef0
[    2.419511] PKRU: 55555554
[    2.419526] Call Trace:
[    2.419543]  <TASK>
[    2.419558]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.419578]  register_netdevice (net/core/dev.c:11488)
[    2.419602]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.419627]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.419650]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.419671]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.419701]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.419733] RIP: 0033:0x47cc8d
[    2.419751] 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 
[    2.419868] RSP: 002b:00007fffe850a020 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.419915] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.419962] RDX: 00007fffe850a0a0 RSI: 00000000400454ca RDI: 0000000000000005
[    2.420003] RBP: 00007fffe850a070 R08: 0000000000000000 R09: 0000000000000000
[    2.420050] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe850a578
[    2.420090] R13: 00007fffe850a5f8 R14: 0000000000000002 R15: 0000000000543540
| [    2.420193] ------------[ cut here ]------------
| [    2.420223] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/158
| [    2.420266] Modules linked in:
| [    2.420346] Tainted: [W]=WARN
[    2.420369] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.420410] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.420436] 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
[    2.420535] RSP: 0018:ff4d31d2403ffd60 EFLAGS: 00010286
[    2.420567] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.420611] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3bbf0501c3cc00
[    2.420652] RBP: 0000000000000002 R08: ff3bbf0503315c50 R09: ff3bbf0504848030
[    2.420695] R10: ff3bbf05049cc118 R11: fefefefefefefeff R12: 0000000000000000
[    2.420739] R13: 0000000000000010 R14: ff3bbf05049cc000 R15: ff3bbf0501c3cc00
[    2.420785] FS:  0000000001ee2400(0000) GS:ff3bbf05b6696000(0000) knlGS:0000000000000000
[    2.420839] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.420876] CR2: 00007f9a13a93000 CR3: 000000000488b006 CR4: 0000000000771ef0
[    2.420920] PKRU: 55555554
[    2.420935] Call Trace:
[    2.420950]  <TASK>
[    2.420966]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.420992]  notifier_call_chain (kernel/notifier.c:85)
[    2.421023]  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)
[    2.421052]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.421074]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.421096]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.421118]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.421138]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.421163] RIP: 0033:0x47cc8d
[    2.421182] 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 
[    2.421270] RSP: 002b:00007fffe850a060 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.421313] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.421361] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.421402] RBP: 00007fffe850a0b0 R08: 0000000000000000 R09: 0000000000000000
[    2.421444] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe850a578
[    2.421486] R13: 00007fffe850a5f8 R14: 0000000000000002 R15: 0000000000543540
| [    2.421582] ------------[ cut here ]------------
| [    2.421616] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/158
| [    2.421666] Modules linked in:
| [    2.421739] Tainted: [W]=WARN
[    2.421760] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.421804] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.421835] 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
[    2.421943] RSP: 0018:ff4d31d2403ffc10 EFLAGS: 00010286
[    2.421971] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.422012] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3bbf0501c3cc00
[    2.422053] RBP: 0000000000000000 R08: ff3bbf0503315c50 R09: ff3bbf050484d030
[    2.422100] R10: ff3bbf05049cc118 R11: fefefefefefefeff R12: 0000000000000000
[    2.422139] R13: 0000000000000010 R14: ff3bbf05049cc000 R15: ff3bbf0501c3cc00
[    2.422183] FS:  0000000001ee2400(0000) GS:ff3bbf05b6696000(0000) knlGS:0000000000000000
[    2.422219] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.422255] CR2: 00007f9a13a93000 CR3: 000000000488b006 CR4: 0000000000771ef0
[    2.422297] PKRU: 55555554
[    2.422311] Call Trace:
[    2.422326]  <TASK>
[    2.422339]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.422361]  __dev_notify_flags (net/core/dev.c:9787)
[    2.422385]  netif_change_flags (net/core/dev.c:9820)
[    2.422407]  dev_change_flags (net/core/dev_api.c:68)
[    2.422433]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.422458]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.422480]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.422510]  sock_do_ioctl (net/socket.c:1313)
[    2.422534]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.422557]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.422586]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.422616] RIP: 0033:0x47cc8d
[    2.422640] 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 
[    2.422739] RSP: 002b:00007fffe850a040 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.422784] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.422834] RDX: 00007fffe850a0b0 RSI: 0000000000008914 RDI: 0000000000000006
[    2.422876] RBP: 00007fffe850a090 R08: 0000000000000000 R09: 0000000000000000
[    2.422919] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe850a578
[    2.422961] R13: 00007fffe850a5f8 R14: 0000000000000002 R15: 0000000000543540
| [   47.395444] ------------[ cut here ]------------
| [   47.395537] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/158
| [   47.395601] Modules linked in:
| [   47.395689] Tainted: [W]=WARN
[   47.395710] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.395754] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.395789] 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
[   47.395902] RSP: 0018:ff4d31d2403ffb58 EFLAGS: 00010286
[   47.395928] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.395975] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3bbf0501c3af00
[   47.396024] RBP: 0000000000000000 R08: ff3bbf0503315c50 R09: ff3bbf050484d030
[   47.396064] R10: ff3bbf05049cc118 R11: fefefefefefefeff R12: 0000000000000000
[   47.396107] R13: 0000000000000010 R14: ff3bbf05049cc000 R15: ff3bbf0501c3af00
[   47.396160] FS:  0000000000000000(0000) GS:ff3bbf05b6696000(0000) knlGS:0000000000000000
[   47.396213] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.396247] CR2: 00007f9a13a93000 CR3: 000000003b242003 CR4: 0000000000771ef0
[   47.396291] PKRU: 55555554
[   47.396305] Call Trace:
[   47.396319]  <TASK>
[   47.396336]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.396359]  netif_close_many (net/core/dev.c:1804)
[   47.396383]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.396411]  ? __queue_work (kernel/workqueue.c:2401)
[   47.396437]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.396466]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.396491]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.396512]  __fput (fs/file_table.c:510)
[   47.396537]  task_work_run (kernel/task_work.c:233)
[   47.396561]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.396588]  do_group_exit (kernel/exit.c:1119)
[   47.396613]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   47.396633]  get_signal (kernel/signal.c:3037)
[   47.396654]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.396688]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.396720]  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)
[   47.396745]  ? __sysvec_call_function_single (arch/x86/kernel/smp.c:272)
[   47.396779]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.396807] RIP: 0033:0x4c2d9e
[   47.396832] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.396869] RSP: 002b:00007fffe85099d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.396917] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.396963] RDX: 0000000000000014 RSI: 00007fffe8509ab0 RDI: 0000000000000007
[   47.397009] RBP: 00007fffe85099e0 R08: 00007fffe8509a70 R09: 000000000000000c
[   47.397049] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000001eeaae0
[   47.397090] R13: 00007fffe850a5f8 R14: 00007fffe8509ba0 R15: 0000000000543540
| [   47.397255] ------------[ cut here ]------------
| [   47.397287] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/158
| [   47.397347] Modules linked in:
| [   47.397436] Tainted: [W]=WARN
[   47.397457] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.397495] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.397527] 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
[   47.397631] RSP: 0018:ff4d31d2403ffbc8 EFLAGS: 00010286
[   47.397662] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.397705] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3bbf0501c3af00
[   47.397747] RBP: 0000000000000000 R08: ff3bbf0503315c50 R09: ff3bbf0504a42030
[   47.397946] R10: ff3bbf05049cc118 R11: fefefefefefefeff R12: 0000000000000000
[   47.398000] R13: 0000000000000011 R14: ff3bbf05049cc000 R15: ff3bbf0501c3af00
[   47.398046] FS:  0000000000000000(0000) GS:ff3bbf05b6696000(0000) knlGS:0000000000000000
[   47.398092] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.398128] CR2: 00007f9a13a93000 CR3: 000000003b242003 CR4: 0000000000771ef0
[   47.398177] PKRU: 55555554
[   47.398192] Call Trace:
[   47.398208]  <TASK>
[   47.398221]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.398252]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.398283]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.398305]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.398325]  __fput (fs/file_table.c:510)
[   47.398348]  task_work_run (kernel/task_work.c:233)
[   47.398372]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.398394]  do_group_exit (kernel/exit.c:1119)
[   47.398415]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   47.398437]  get_signal (kernel/signal.c:3037)
[   47.398460]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.398494]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.398519]  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)
[   47.398539]  ? __sysvec_call_function_single (arch/x86/kernel/smp.c:272)
[   47.398571]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.398599] RIP: 0033:0x4c2d9e
[   47.398622] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.398658] RSP: 002b:00007fffe85099d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.398703] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.398751] RDX: 0000000000000014 RSI: 00007fffe8509ab0 RDI: 0000000000000007
[   47.398792] RBP: 00007fffe85099e0 R08: 00007fffe8509a70 R09: 000000000000000c
[   47.398838] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000001eeaae0
[   47.398882] R13: 00007fffe850a5f8 R14: 00007fffe8509ba0 R15: 0000000000543540
| [   47.412865] ------------[ cut here ]------------
| [   47.412943] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: 1/65
| [   47.413052] Modules linked in:
| [   47.413219] Tainted: [W]=WARN
[   47.413277] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.413351] Workqueue: netns cleanup_net
[   47.413415] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.413482] 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
[   47.413628] RSP: 0018:ff4d31d24023fc78 EFLAGS: 00010286
[   47.413697] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.413787] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3bbf0501c3ae00
[   47.413871] RBP: 0000000000000000 R08: ff3bbf05030fb4d0 R09: ff3bbf050306d02c
[   47.413957] R10: ff3bbf05019be118 R11: fefefefefefefeff R12: 0000000000000000
[   47.414047] R13: 0000000000000011 R14: ff3bbf05019be000 R15: ff3bbf0501c3ae00
[   47.414128] FS:  0000000000000000(0000) GS:ff3bbf05b6796000(0000) knlGS:0000000000000000
[   47.414255] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.414329] CR2: 00007f857710ef98 CR3: 000000003b242003 CR4: 0000000000771ef0
[   47.414415] PKRU: 55555554
[   47.414466] Call Trace:
[   47.414517]  <TASK>
[   47.414568]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.414636]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.414704]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.414764]  cleanup_net (net/core/net_namespace.c:702)
[   47.414832]  process_one_work (kernel/workqueue.c:3314)
[   47.414896]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.414957]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.415017]  kthread (kernel/kthread.c:436)
[   47.415076]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.415136]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.415200]  ? 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