======================================
| xx__-> [    2.307660] ------------[ cut here ]------------
| [    2.307711] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/159
| [    2.307769] Modules linked in:
| [    2.307864] Tainted: [W]=WARN
[    2.307885] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.307922] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.307951] 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
[    2.308052] RSP: 0018:ff62d9d1803d7cc8 EFLAGS: 00010286
[    2.308087] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.308137] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff13f35fc1dead00
[    2.308180] RBP: 0000000000000000 R08: ff13f35fc338ef10 R09: ff13f35fc604302c
[    2.308218] R10: ff13f35fc19be118 R11: fefefefefefefeff R12: 0000000000000000
[    2.308263] R13: 0000000000000010 R14: ff13f35fc19be000 R15: ff13f35fc1dead00
[    2.308308] FS:  00007ffabbcd4740(0000) GS:ff13f3606f616000(0000) knlGS:0000000000000000
[    2.308354] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.308389] CR2: 0000563b79d72310 CR3: 0000000001de5004 CR4: 0000000000771ef0
[    2.308435] PKRU: 55555554
[    2.308450] Call Trace:
[    2.308466]  <TASK>
[    2.308485]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.308507]  register_netdevice (net/core/dev.c:11488)
[    2.308534]  register_netdev (net/core/dev.c:11552)
[    2.308557]  loopback_net_init (drivers/net/loopback.c:218)
[    2.308583]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.308608]  ops_init (net/core/net_namespace.c:137)
[    2.308634]  setup_net (net/core/net_namespace.c:446)
[    2.308653]  copy_net_ns (net/core/net_namespace.c:579)
[    2.308675]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.308706]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.308733]  ksys_unshare (kernel/fork.c:3243)
[    2.308758]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.308782]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.308801]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.308831] RIP: 0033:0x7ffabbdcfbcb
[    2.308852] 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
[    2.308952] RSP: 002b:00007ffefea14dd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.308988] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffabbdcfbcb
[    2.309034] RDX: 0000000000000000 RSI: 00007ffefea14b40 RDI: 0000000040000000
[    2.309074] RBP: 00007ffefea15160 R08: 00007ffefea14d30 R09: 0000000000000000
[    2.309116] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.309164] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000563b79d75b68
| [    2.312120] ------------[ cut here ]------------
| [    2.312150] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.312204] Modules linked in:
| [    2.312288] Tainted: [W]=WARN
[    2.312308] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.312344] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.312372] 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
[    2.312476] RSP: 0018:ff62d9d1803d7d68 EFLAGS: 00010286
[    2.312504] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.312543] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff13f35fc1dead00
[    2.312581] RBP: 0000000000000000 R08: ff13f35fc28c03d0 R09: ff13f35fc6040030
[    2.312620] R10: ff13f35fc4688118 R11: fefefefefefefeff R12: 0000000000000000
[    2.312661] R13: 0000000000000010 R14: ff13f35fc4688000 R15: ff13f35fc1dead00
[    2.312703] FS:  00000000114e6400(0000) GS:ff13f3606f616000(0000) knlGS:0000000000000000
[    2.312751] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.312783] CR2: 00007efd7b30d000 CR3: 000000000475f005 CR4: 0000000000771ef0
[    2.312826] PKRU: 55555554
[    2.312840] Call Trace:
[    2.312855]  <TASK>
[    2.312872]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.312898]  register_netdevice (net/core/dev.c:11488)
[    2.312918]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.312943]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.312965]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.312988]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.313010]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.313039] RIP: 0033:0x47cc8d
[    2.313060] 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 
[    2.313163] RSP: 002b:00007ffe0f600f80 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.313211] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.313260] RDX: 00007ffe0f601000 RSI: 00000000400454ca RDI: 0000000000000005
[    2.313300] RBP: 00007ffe0f600fd0 R08: 0000000000000000 R09: 0000000000000000
[    2.313344] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe0f6014d8
[    2.313385] R13: 00007ffe0f601558 R14: 0000000000000002 R15: 0000000000543540
| [    2.313492] ------------[ cut here ]------------
| [    2.313520] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.313575] Modules linked in:
| [    2.313655] Tainted: [W]=WARN
[    2.313677] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.313711] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.313739] 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
[    2.313842] RSP: 0018:ff62d9d1803d7d60 EFLAGS: 00010286
[    2.313874] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.313920] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff13f35fc1dead00
[    2.313962] RBP: 0000000000000002 R08: ff13f35fc28c03d0 R09: ff13f35fc6040030
[    2.314002] R10: ff13f35fc4688118 R11: fefefefefefefeff R12: 0000000000000000
[    2.314043] R13: 0000000000000010 R14: ff13f35fc4688000 R15: ff13f35fc1dead00
[    2.314083] FS:  00000000114e6400(0000) GS:ff13f3606f616000(0000) knlGS:0000000000000000
[    2.314125] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.314157] CR2: 00007efd7b30d000 CR3: 000000000475f005 CR4: 0000000000771ef0
[    2.314197] PKRU: 55555554
[    2.314212] Call Trace:
[    2.314224]  <TASK>
[    2.314239]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.314261]  notifier_call_chain (kernel/notifier.c:85)
[    2.314281]  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)
[    2.314305]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.314326]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.314348]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.314370]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.314390]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.314419] RIP: 0033:0x47cc8d
[    2.314441] 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 
[    2.314541] RSP: 002b:00007ffe0f600fc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.314589] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.314632] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.314668] RBP: 00007ffe0f601010 R08: 0000000000000000 R09: 0000000000000000
[    2.314711] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe0f6014d8
[    2.314754] R13: 00007ffe0f601558 R14: 0000000000000002 R15: 0000000000543540
| [    2.314850] ------------[ cut here ]------------
| [    2.314882] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.314934] Modules linked in:
| [    2.315011] Tainted: [W]=WARN
[    2.315031] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.315067] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.315100] 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
[    2.315198] RSP: 0018:ff62d9d1803d7c10 EFLAGS: 00010286
[    2.315226] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.315267] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff13f35fc1dead00
[    2.315311] RBP: 0000000000000000 R08: ff13f35fc28c03d0 R09: ff13f35fc6045030
[    2.315357] R10: ff13f35fc4688118 R11: fefefefefefefeff R12: 0000000000000000
[    2.315396] R13: 0000000000000010 R14: ff13f35fc4688000 R15: ff13f35fc1dead00
[    2.315441] FS:  00000000114e6400(0000) GS:ff13f3606f616000(0000) knlGS:0000000000000000
[    2.315492] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.315526] CR2: 00007efd7b30d000 CR3: 000000000475f005 CR4: 0000000000771ef0
[    2.315567] PKRU: 55555554
[    2.315580] Call Trace:
[    2.315594]  <TASK>
[    2.315608]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.315628]  __dev_notify_flags (net/core/dev.c:9787)
[    2.315651]  netif_change_flags (net/core/dev.c:9820)
[    2.315674]  dev_change_flags (net/core/dev_api.c:68)
[    2.315695]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.315719]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.315742]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.315762]  sock_do_ioctl (net/socket.c:1313)
[    2.315784]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.315808]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.315830]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.315860] RIP: 0033:0x47cc8d
[    2.315879] 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 
[    2.315986] RSP: 002b:00007ffe0f600fa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.316029] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.316078] RDX: 00007ffe0f601010 RSI: 0000000000008914 RDI: 0000000000000006
[    2.316120] RBP: 00007ffe0f600ff0 R08: 0000000000000000 R09: 0000000000000000
[    2.316165] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe0f6014d8
[    2.316208] R13: 00007ffe0f601558 R14: 0000000000000002 R15: 0000000000543540
| [   47.286966] ------------[ cut here ]------------
| [   47.287037] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [   47.287099] Modules linked in:
| [   47.287182] Tainted: [W]=WARN
[   47.287209] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.287247] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.287275] 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
[   47.287372] RSP: 0018:ff62d9d1803d7b58 EFLAGS: 00010286
[   47.287401] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.287445] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff13f35fc2ee7500
[   47.287487] RBP: 0000000000000000 R08: ff13f35fc28c03d0 R09: ff13f35fc6045030
[   47.287527] R10: ff13f35fc4688118 R11: fefefefefefefeff R12: 0000000000000000
[   47.287569] R13: 0000000000000010 R14: ff13f35fc4688000 R15: ff13f35fc2ee7500
[   47.287616] FS:  0000000000000000(0000) GS:ff13f3606f616000(0000) knlGS:0000000000000000
[   47.287658] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.287696] CR2: 00007efd7b30d000 CR3: 0000000026c42006 CR4: 0000000000771ef0
[   47.287740] PKRU: 55555554
[   47.287754] Call Trace:
[   47.287767]  <TASK>
[   47.287784]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.287805]  netif_close_many (net/core/dev.c:1804)
[   47.287827]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.287862]  ? __queue_work (kernel/workqueue.c:2401)
[   47.287888]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.287917]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.287942]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.287963]  __fput (fs/file_table.c:510)
[   47.287985]  task_work_run (kernel/task_work.c:233)
[   47.288009]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.288031]  do_group_exit (kernel/exit.c:1119)
[   47.288054]  get_signal (kernel/signal.c:3037)
[   47.288078]  ? netlink_bind (net/netlink/af_netlink.c:462 net/netlink/af_netlink.c:459 net/netlink/af_netlink.c:1054)
[   47.288102]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.288132]  ? __sys_bind (net/socket.c:1933 (discriminator 3) net/socket.c:1964 (discriminator 3))
[   47.288156]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.288183]  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)
[   47.288208]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.288238] RIP: 0033:0x47e7bb
[   47.288258] Code: Unable to access opcode bytes at 0x47e791.

Code starting with the faulting instruction
===========================================
[   47.288296] RSP: 002b:00007ffe0f600a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
[   47.288338] RAX: 0000000000000000 RBX: 00007ffe0f600b00 RCX: 000000000047e7bb
[   47.288380] RDX: 000000000000000c RSI: 00007ffe0f600a3c RDI: 0000000000000007
[   47.288420] RBP: 00007ffe0f600a60 R08: 0000000000000041 R09: 00000000114e73e0
[   47.288459] R10: 0000000000000040 R11: 0000000000000246 R12: 00007ffe0f6014d8
[   47.288499] R13: 00007ffe0f601558 R14: 00007ffe0f600fd8 R15: 0000000000543540
| [   47.288653] ------------[ cut here ]------------
| [   47.288680] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [   47.288724] Modules linked in:
| [   47.288810] Tainted: [W]=WARN
[   47.288830] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.288980] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.289012] 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
[   47.289103] RSP: 0018:ff62d9d1803d7bc8 EFLAGS: 00010286
[   47.289132] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.289166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff13f35fc2ee7500
[   47.289206] RBP: 0000000000000000 R08: ff13f35fc28c03d0 R09: ff13f35fc6053830
[   47.289256] R10: ff13f35fc4688118 R11: fefefefefefefeff R12: 0000000000000000
[   47.289296] R13: 0000000000000011 R14: ff13f35fc4688000 R15: ff13f35fc2ee7500
[   47.289337] FS:  0000000000000000(0000) GS:ff13f3606f616000(0000) knlGS:0000000000000000
[   47.289379] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.289415] CR2: 00007efd7b30d000 CR3: 0000000026c42006 CR4: 0000000000771ef0
[   47.289454] PKRU: 55555554
[   47.289469] Call Trace:
[   47.289484]  <TASK>
[   47.289500]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.289529]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.289554]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.289577]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.289601]  __fput (fs/file_table.c:510)
[   47.289623]  task_work_run (kernel/task_work.c:233)
[   47.289646]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.289669]  do_group_exit (kernel/exit.c:1119)
[   47.289689]  get_signal (kernel/signal.c:3037)
[   47.289711]  ? netlink_bind (net/netlink/af_netlink.c:462 net/netlink/af_netlink.c:459 net/netlink/af_netlink.c:1054)
[   47.289733]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.289760]  ? __sys_bind (net/socket.c:1933 (discriminator 3) net/socket.c:1964 (discriminator 3))
[   47.289781]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.289809]  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)
[   47.289832]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.289862] RIP: 0033:0x47e7bb
[   47.289881] Code: Unable to access opcode bytes at 0x47e791.

Code starting with the faulting instruction
===========================================
[   47.289916] RSP: 002b:00007ffe0f600a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
[   47.289954] RAX: 0000000000000000 RBX: 00007ffe0f600b00 RCX: 000000000047e7bb
[   47.289992] RDX: 000000000000000c RSI: 00007ffe0f600a3c RDI: 0000000000000007
[   47.290034] RBP: 00007ffe0f600a60 R08: 0000000000000041 R09: 00000000114e73e0
[   47.290078] R10: 0000000000000040 R11: 0000000000000246 R12: 00007ffe0f6014d8
[   47.290121] R13: 00007ffe0f601558 R14: 00007ffe0f600fd8 R15: 0000000000543540
| [   47.299987] ------------[ cut here ]------------
| [   47.300035] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 1/64
| [   47.300099] Modules linked in:
| [   47.300184] Tainted: [W]=WARN
[   47.300207] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.300246] Workqueue: netns cleanup_net
[   47.300272] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.300301] 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
[   47.300401] RSP: 0018:ff62d9d180237c78 EFLAGS: 00010286
[   47.300431] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.300473] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff13f35fc18c8f00
[   47.300514] RBP: 0000000000000000 R08: ff13f35fc338ef10 R09: ff13f35fc2dd282c
[   47.300561] R10: ff13f35fc19be118 R11: fefefefefefefeff R12: 0000000000000000
[   47.300606] R13: 0000000000000011 R14: ff13f35fc19be000 R15: ff13f35fc18c8f00
[   47.300651] FS:  0000000000000000(0000) GS:ff13f3606f496000(0000) knlGS:0000000000000000
[   47.300691] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.300727] CR2: 0000555594064340 CR3: 0000000002f49001 CR4: 0000000000771ef0
[   47.300773] PKRU: 55555554
[   47.300787] Call Trace:
[   47.300802]  <TASK>
[   47.300818]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.300847]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.300886]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.300908]  cleanup_net (net/core/net_namespace.c:702)
[   47.300930]  process_one_work (kernel/workqueue.c:3314)
[   47.300955]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.300978]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.300999]  kthread (kernel/kthread.c:436)
[   47.301022]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.301046]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.301067]  ? 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