======================================
| xx__-> [    2.282865] ------------[ cut here ]------------
| [    2.282931] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/159
| [    2.282971] Modules linked in:
| [    2.283023] Tainted: [W]=WARN
[    2.283036] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.283056] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.283080] 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
[    2.283150] RSP: 0018:ff5c779e003f7cc8 EFLAGS: 00010286
[    2.283169] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.283203] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c61000
[    2.283231] RBP: 0000000000000000 R08: ff4732ea83f0dd90 R09: ff4732ea84dfa02c
[    2.283256] R10: ff4732ea83c7d118 R11: fefefefefefefeff R12: 0000000000000000
[    2.283282] R13: 0000000000000010 R14: ff4732ea83c7d000 R15: ff4732ea83c61000
[    2.283310] FS:  00007f212425e740(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[    2.283334] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.283352] CR2: 000055afa076e310 CR3: 0000000003eca001 CR4: 0000000000771ef0
[    2.283378] PKRU: 55555554
[    2.283387] Call Trace:
[    2.283399]  <TASK>
[    2.283407]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.283420]  register_netdevice (net/core/dev.c:11488)
[    2.283434]  register_netdev (net/core/dev.c:11552)
[    2.283445]  loopback_net_init (drivers/net/loopback.c:218)
[    2.283463]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.283479]  ops_init (net/core/net_namespace.c:137)
[    2.283493]  setup_net (net/core/net_namespace.c:446)
[    2.283507]  copy_net_ns (net/core/net_namespace.c:579)
[    2.283520]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.283539]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.283555]  ksys_unshare (kernel/fork.c:3243)
[    2.283571]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.283585]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.283600]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.283617] RIP: 0033:0x7f2124359bcb
[    2.283630] 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
[    2.283679] RSP: 002b:00007ffe87c28278 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.283700] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2124359bcb
[    2.283723] RDX: 0000000000000000 RSI: 00007ffe87c27fe0 RDI: 0000000040000000
[    2.283744] RBP: 00007ffe87c28600 R08: 00007ffe87c281d0 R09: 0000000000000000
[    2.283768] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.283790] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055afa0771b68
| [    2.288509] ------------[ cut here ]------------
| [    2.288545] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
| [    2.288584] Modules linked in:
| [    2.288636] Tainted: [W]=WARN
[    2.288650] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.288674] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.288692] 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
[    2.288749] RSP: 0018:ff5c779e003f7d68 EFLAGS: 00010286
[    2.288769] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.288796] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c61000
[    2.288823] RBP: 0000000000000000 R08: ff4732ea83cf5850 R09: ff4732ea84dff030
[    2.288848] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.288874] R13: 0000000000000010 R14: ff4732ea84c9c000 R15: ff4732ea83c61000
[    2.288908] FS:  000000003eeed400(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[    2.288936] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.288957] CR2: 00007fef610fe000 CR3: 0000000004dd3002 CR4: 0000000000771ef0
[    2.288982] PKRU: 55555554
[    2.288991] Call Trace:
[    2.289002]  <TASK>
[    2.289012]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.289027]  register_netdevice (net/core/dev.c:11488)
[    2.289044]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.289060]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.289077]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.289092]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.289110]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.289130] RIP: 0033:0x47cc8d
[    2.289144] 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 
[    2.289218] RSP: 002b:00007ffe6432ba80 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.289244] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.289269] RDX: 00007ffe6432bb00 RSI: 00000000400454ca RDI: 0000000000000005
[    2.289293] RBP: 00007ffe6432bad0 R08: 0000000000000000 R09: 0000000000000000
[    2.289318] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe6432bfd8
[    2.289342] R13: 00007ffe6432c058 R14: 0000000000000002 R15: 0000000000543540
| [    2.289413] ------------[ cut here ]------------
| [    2.289431] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
| [    2.289461] Modules linked in:
| [    2.289511] Tainted: [W]=WARN
[    2.289523] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.289545] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.289563] 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
[    2.289623] RSP: 0018:ff5c779e003f7d60 EFLAGS: 00010286
[    2.289644] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.289675] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c61000
[    2.289700] RBP: 0000000000000002 R08: ff4732ea83cf5850 R09: ff4732ea84dff030
[    2.289724] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.289749] R13: 0000000000000010 R14: ff4732ea84c9c000 R15: ff4732ea83c61000
[    2.289781] FS:  000000003eeed400(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[    2.289809] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.289830] CR2: 00007fef610fe000 CR3: 0000000004dd3002 CR4: 0000000000771ef0
[    2.289856] PKRU: 55555554
[    2.289865] Call Trace:
[    2.289875]  <TASK>
[    2.289885]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.289902]  notifier_call_chain (kernel/notifier.c:85)
[    2.289920]  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)
[    2.289940]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.289956]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.289971]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.289985]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.289999]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.290019] RIP: 0033:0x47cc8d
[    2.290032] 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 
[    2.290090] RSP: 002b:00007ffe6432bac0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.290114] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.290138] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.290161] RBP: 00007ffe6432bb10 R08: 0000000000000005 R09: 0000000000001ff0
[    2.290185] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffe6432bfd8
[    2.290216] R13: 00007ffe6432c058 R14: 0000000000000002 R15: 0000000000543540
| [    2.290283] ------------[ cut here ]------------
| [    2.290299] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
| [    2.290327] Modules linked in:
| [    2.290372] Tainted: [W]=WARN
[    2.290386] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.290407] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.290424] 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
[    2.290480] RSP: 0018:ff5c779e003f7c10 EFLAGS: 00010286
[    2.290496] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.290523] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c61000
[    2.290548] RBP: 0000000000000000 R08: ff4732ea83cf5850 R09: ff4732ea84dfc030
[    2.290574] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.290600] R13: 0000000000000010 R14: ff4732ea84c9c000 R15: ff4732ea83c61000
[    2.290626] FS:  000000003eeed400(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[    2.290652] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.290672] CR2: 00007fef610fe000 CR3: 0000000004dd3002 CR4: 0000000000771ef0
[    2.290697] PKRU: 55555554
[    2.290707] Call Trace:
[    2.290716]  <TASK>
[    2.290725]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.290739]  __dev_notify_flags (net/core/dev.c:9787)
[    2.290756]  netif_change_flags (net/core/dev.c:9820)
[    2.290770]  dev_change_flags (net/core/dev_api.c:68)
[    2.290783]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.290799]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.290815]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.290831]  sock_do_ioctl (net/socket.c:1313)
[    2.290848]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.290862]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.290878]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.290899] RIP: 0033:0x47cc8d
[    2.290913] 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 
[    2.290969] RSP: 002b:00007ffe6432baa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.290996] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.291023] RDX: 00007ffe6432bb10 RSI: 0000000000008914 RDI: 0000000000000006
[    2.291049] RBP: 00007ffe6432baf0 R08: 0000000000000005 R09: 0000000000001ff0
[    2.291072] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffe6432bfd8
[    2.291101] R13: 00007ffe6432c058 R14: 0000000000000002 R15: 0000000000543540
| [   47.263610] ------------[ cut here ]------------
| [   47.263710] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
| [   47.263783] Modules linked in:
| [   47.263873] Tainted: [W]=WARN
[   47.263897] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.263931] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.263964] 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
[   47.264061] RSP: 0018:ff5c779e003f7b58 EFLAGS: 00010286
[   47.264093] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.264132] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c73b00
[   47.264172] RBP: 0000000000000000 R08: ff4732ea83cf5850 R09: ff4732ea84dfc030
[   47.264769] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.264814] R13: 0000000000000010 R14: ff4732ea84c9c000 R15: ff4732ea83c73b00
[   47.264864] FS:  0000000000000000(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[   47.264906] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.264945] CR2: 00007fef610fe000 CR3: 000000001ce42003 CR4: 0000000000771ef0
[   47.264993] PKRU: 55555554
[   47.266570] Call Trace:
[   47.266600]  <TASK>
[   47.266622]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.266648]  netif_close_many (net/core/dev.c:1804)
[   47.266675]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.266704]  ? __queue_work (kernel/workqueue.c:2401)
[   47.266733]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.266764]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.266790]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.266810]  __fput (fs/file_table.c:510)
[   47.266839]  task_work_run (kernel/task_work.c:233)
[   47.266866]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.266889]  ? ___sys_recvmsg (net/socket.c:2961)
[   47.266912]  do_group_exit (kernel/exit.c:1119)
[   47.266934]  get_signal (kernel/signal.c:3037)
[   47.266960]  ? 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))
[   47.266994]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.267028]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.267068]  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)
[   47.267093]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.267122] RIP: 0033:0x4c2d9e
[   47.267145] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.267180] RSP: 002b:00007ffe6432b430 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.267229] RAX: 0000000000000050 RBX: 00007ffe6432b4c0 RCX: 00000000004c2d9e
[   47.267271] RDX: 0000000000000000 RSI: 00007ffe6432b4d0 RDI: 0000000000000007
[   47.267316] RBP: 00007ffe6432b440 R08: 0000000000000000 R09: 0000000000000000
[   47.267355] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe6432b4b4
[   47.267395] R13: 00007ffe6432c058 R14: 00007ffe6432b600 R15: 0000000000543540
| [   47.267554] ------------[ cut here ]------------
| [   47.267582] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
| [   47.267630] Modules linked in:
| [   47.267708] Tainted: [W]=WARN
[   47.267732] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.267766] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.267792] 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
[   47.267883] RSP: 0018:ff5c779e003f7bc8 EFLAGS: 00010286
[   47.267910] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.267960] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c73b00
[   47.268003] RBP: 0000000000000000 R08: ff4732ea83cf5850 R09: ff4732ea84e00830
[   47.268049] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.268091] R13: 0000000000000011 R14: ff4732ea84c9c000 R15: ff4732ea83c73b00
[   47.268132] FS:  0000000000000000(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[   47.268177] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.268214] CR2: 00007fef610fe000 CR3: 000000001ce42003 CR4: 0000000000771ef0
[   47.268255] PKRU: 55555554
[   47.268271] Call Trace:
[   47.268285]  <TASK>
[   47.268300]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.268328]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.269940]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.269977]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.270001]  __fput (fs/file_table.c:510)
[   47.270027]  task_work_run (kernel/task_work.c:233)
[   47.270054]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.270080]  ? ___sys_recvmsg (net/socket.c:2961)
[   47.270106]  do_group_exit (kernel/exit.c:1119)
[   47.270126]  get_signal (kernel/signal.c:3037)
[   47.270155]  ? 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))
[   47.270197]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.270229]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.270259]  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)
[   47.270283]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.270314] RIP: 0033:0x4c2d9e
[   47.270337] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.270373] RSP: 002b:00007ffe6432b430 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.270417] RAX: 0000000000000050 RBX: 00007ffe6432b4c0 RCX: 00000000004c2d9e
[   47.270455] RDX: 0000000000000000 RSI: 00007ffe6432b4d0 RDI: 0000000000000007
[   47.270494] RBP: 00007ffe6432b440 R08: 0000000000000000 R09: 0000000000000000
[   47.270536] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe6432b4b4
[   47.270578] R13: 00007ffe6432c058 R14: 00007ffe6432b600 R15: 0000000000543540
| [   47.278312] ------------[ cut here ]------------
| [   47.278358] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: 0/12
| [   47.278419] Modules linked in:
| [   47.278503] Tainted: [W]=WARN
[   47.278523] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.278557] Workqueue: netns cleanup_net
[   47.278582] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.278614] 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
[   47.278706] RSP: 0018:ff5c779e00067c78 EFLAGS: 00010286
[   47.278735] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.278776] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c73e00
[   47.278817] RBP: 0000000000000000 R08: ff4732ea83f0dd90 R09: ff4732ea84d4b82c
[   47.278854] R10: ff4732ea83c7d118 R11: fefefefefefefeff R12: 0000000000000000
[   47.278897] R13: 0000000000000011 R14: ff4732ea83c7d000 R15: ff4732ea83c73e00
[   47.278938] FS:  0000000000000000(0000) GS:ff4732eb24d16000(0000) knlGS:0000000000000000
[   47.278979] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.279009] CR2: 00007fe90057f0a0 CR3: 000000001ce42005 CR4: 0000000000771ef0
[   47.279053] PKRU: 55555554
[   47.279069] Call Trace:
[   47.279085]  <TASK>
[   47.279101]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.279132]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.279160]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.279186]  cleanup_net (net/core/net_namespace.c:702)
[   47.279217]  process_one_work (kernel/workqueue.c:3314)
[   47.279243]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.279267]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.279289]  kthread (kernel/kthread.c:436)
[   47.279311]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.279332]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.279357]  ? 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