======================================
| xx__-> [    2.562293] ------------[ cut here ]------------
| [    2.562334] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: unshare/159
| [    2.562376] Modules linked in:
| [    2.562436] Tainted: [W]=WARN
[    2.562448] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.562473] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.562490] 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
[    2.562543] RSP: 0018:ff722176c03dfcc8 EFLAGS: 00010286
[    2.562562] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.562583] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf1282f95200
[    2.562613] RBP: 0000000000000000 R08: ff39bf1281d95c50 R09: ff39bf128583202c
[    2.562636] R10: ff39bf12819ad118 R11: fefefefefefefeff R12: 0000000000000000
[    2.562659] R13: 0000000000000010 R14: ff39bf12819ad000 R15: ff39bf1282f95200
[    2.562687] FS:  00007fe1adf25740(0000) GS:ff39bf132df16000(0000) knlGS:0000000000000000
[    2.562713] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.562730] CR2: 00007fe1adff0820 CR3: 0000000003788003 CR4: 0000000000771ef0
[    2.562754] PKRU: 55555554
[    2.562763] Call Trace:
[    2.562776]  <TASK>
[    2.562785]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.562799]  register_netdevice (net/core/dev.c:11488)
[    2.562813]  register_netdev (net/core/dev.c:11552)
[    2.562828]  loopback_net_init (drivers/net/loopback.c:218)
[    2.562842]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.562857]  ops_init (net/core/net_namespace.c:137)
[    2.562873]  setup_net (net/core/net_namespace.c:446)
[    2.562885]  copy_net_ns (net/core/net_namespace.c:579)
[    2.562898]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.562914]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.562934]  ksys_unshare (kernel/fork.c:3243)
[    2.562950]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.562963]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.562979]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.562999] RIP: 0033:0x7fe1ae020bcb
[    2.563012] 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
[    2.563071] RSP: 002b:00007ffdf5516148 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.563093] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe1ae020bcb
[    2.563117] RDX: 0000000000000000 RSI: 00007ffdf5515eb0 RDI: 0000000040000000
[    2.563142] RBP: 00007ffdf55164d0 R08: 00007ffdf55160a0 R09: 0000000000000000
[    2.563168] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.563187] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000562877237b68
| [    2.566296] ------------[ cut here ]------------
| [    2.566356] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
| [    2.566423] Modules linked in:
| [    2.566540] Tainted: [W]=WARN
[    2.566594] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.566650] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.566703] 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
[    2.566788] RSP: 0018:ff722176c03dfd68 EFLAGS: 00010286
[    2.566841] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.566900] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf1283473500
[    2.566958] RBP: 0000000000000000 R08: ff39bf128371afd0 R09: ff39bf1282d64030
[    2.567018] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[    2.567083] R13: 0000000000000010 R14: ff39bf12843ec000 R15: ff39bf1283473500
[    2.567146] FS:  0000000011c3d400(0000) GS:ff39bf132df96000(0000) knlGS:0000000000000000
[    2.567207] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.567262] CR2: 00007fc3ac20b000 CR3: 00000000037c9003 CR4: 0000000000771ef0
[    2.567324] PKRU: 55555554
[    2.567369] Call Trace:
[    2.567414]  <TASK>
[    2.567459]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.567508]  register_netdevice (net/core/dev.c:11488)
[    2.567558]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.567616]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.567668]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.567722]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.567773]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.567827] RIP: 0033:0x47cc8d
[    2.567876] 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 
[    2.567960] RSP: 002b:00007ffcadb64cb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.568022] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.568087] RDX: 00007ffcadb64d30 RSI: 00000000400454ca RDI: 0000000000000005
[    2.568145] RBP: 00007ffcadb64d00 R08: 0000000000000000 R09: 0000000000000000
[    2.568203] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcadb65208
[    2.568263] R13: 00007ffcadb65288 R14: 0000000000000002 R15: 0000000000543540
| [    2.568455] ------------[ cut here ]------------
| [    2.568507] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
| [    2.568571] Modules linked in:
| [    2.568695] Tainted: [W]=WARN
[    2.568742] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.568796] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.568849] 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
[    2.568936] RSP: 0018:ff722176c03dfd60 EFLAGS: 00010286
[    2.568987] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.569046] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf1283473500
[    2.569110] RBP: 0000000000000002 R08: ff39bf128371afd0 R09: ff39bf1282d64030
[    2.569169] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[    2.569228] R13: 0000000000000010 R14: ff39bf12843ec000 R15: ff39bf1283473500
[    2.569293] FS:  0000000011c3d400(0000) GS:ff39bf132df96000(0000) knlGS:0000000000000000
[    2.569356] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.569413] CR2: 00007fc3ac20b000 CR3: 00000000037c9003 CR4: 0000000000771ef0
[    2.569474] PKRU: 55555554
[    2.569519] Call Trace:
[    2.569563]  <TASK>
[    2.569614]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.569666]  notifier_call_chain (kernel/notifier.c:85)
[    2.569719]  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)
[    2.569774]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.569826]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.569876]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.569927]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.569977]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.570031] RIP: 0033:0x47cc8d
[    2.570086] 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 
[    2.570171] RSP: 002b:00007ffcadb64cf0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.570229] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.570290] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.570349] RBP: 00007ffcadb64d40 R08: 0000000000000000 R09: 0000000000000000
[    2.570406] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcadb65208
[    2.570464] R13: 00007ffcadb65288 R14: 0000000000000002 R15: 0000000000543540
| [    2.570649] ------------[ cut here ]------------
| [    2.570700] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
| [    2.570764] Modules linked in:
| [    2.570879] Tainted: [W]=WARN
[    2.570925] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.570979] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.571030] 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
[    2.571123] RSP: 0018:ff722176c03dfc10 EFLAGS: 00010286
[    2.571175] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.571233] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf1283473500
[    2.571294] RBP: 0000000000000000 R08: ff39bf128371afd0 R09: ff39bf1285835030
[    2.571352] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[    2.571410] R13: 0000000000000010 R14: ff39bf12843ec000 R15: ff39bf1283473500
[    2.571472] FS:  0000000011c3d400(0000) GS:ff39bf132df96000(0000) knlGS:0000000000000000
[    2.571533] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.571593] CR2: 00007fc3ac20b000 CR3: 00000000037c9003 CR4: 0000000000771ef0
[    2.571654] PKRU: 55555554
[    2.571699] Call Trace:
[    2.571743]  <TASK>
[    2.571788]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.571838]  __dev_notify_flags (net/core/dev.c:9787)
[    2.571888]  netif_change_flags (net/core/dev.c:9820)
[    2.571937]  dev_change_flags (net/core/dev_api.c:68)
[    2.571986]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.572038]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.572095]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.572144]  sock_do_ioctl (net/socket.c:1313)
[    2.572198]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.572250]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.572302]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.572355] RIP: 0033:0x47cc8d
[    2.572403] 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 
[    2.572490] RSP: 002b:00007ffcadb64cd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.572549] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.572613] RDX: 00007ffcadb64d40 RSI: 0000000000008914 RDI: 0000000000000006
[    2.572673] RBP: 00007ffcadb64d20 R08: 0000000000000000 R09: 0000000000000000
[    2.572731] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcadb65208
[    2.572790] R13: 00007ffcadb65288 R14: 0000000000000002 R15: 0000000000543540
| [   47.542674] ------------[ cut here ]------------
| [   47.542793] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
| [   47.542915] Modules linked in:
| [   47.543047] Tainted: [W]=WARN
[   47.543262] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.543323] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.543379] 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
[   47.543500] RSP: 0018:ff722176c03dfb58 EFLAGS: 00010286
[   47.543553] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.543612] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf12834a6a00
[   47.543671] RBP: 0000000000000000 R08: ff39bf128371afd0 R09: ff39bf1285835030
[   47.543731] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[   47.543790] R13: 0000000000000010 R14: ff39bf12843ec000 R15: ff39bf12834a6a00
[   47.543862] FS:  0000000000000000(0000) GS:ff39bf132df96000(0000) knlGS:0000000000000000
[   47.543924] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.543980] CR2: 00007ffdbf5b9d40 CR3: 0000000037242006 CR4: 0000000000771ef0
[   47.544041] PKRU: 55555554
[   47.544092] Call Trace:
[   47.544139]  <TASK>
[   47.544185]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.544236]  netif_close_many (net/core/dev.c:1804)
[   47.544287]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.544342]  ? __queue_work (kernel/workqueue.c:2401)
[   47.544395]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.544448]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.544502]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.544553]  __fput (fs/file_table.c:510)
[   47.544607]  task_work_run (kernel/task_work.c:233)
[   47.544658]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.544711]  ? ___sys_recvmsg (net/socket.c:2961)
[   47.544769]  do_group_exit (kernel/exit.c:1119)
[   47.544826]  get_signal (kernel/signal.c:3037)
[   47.544880]  ? 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))
[   47.544937]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.544994]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.545051]  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)
[   47.545109]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.545163] RIP: 0033:0x4c2d9e
[   47.545213] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.545269] RSP: 002b:00007ffcadb64660 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.545331] RAX: 0000000000000050 RBX: 00007ffcadb646f0 RCX: 00000000004c2d9e
[   47.545390] RDX: 0000000000000000 RSI: 00007ffcadb64700 RDI: 0000000000000007
[   47.545449] RBP: 00007ffcadb64670 R08: 0000000000000000 R09: 0000000000000000
[   47.545508] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffcadb646e4
[   47.545566] R13: 00007ffcadb65288 R14: 00007ffcadb64830 R15: 0000000000543540
| [   47.545817] ------------[ cut here ]------------
| [   47.545843] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [   47.545875] Modules linked in:
| [   47.545922] Tainted: [W]=WARN
[   47.545936] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.545953] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.545969] 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
[   47.546022] RSP: 0018:ff722176c03dfbc8 EFLAGS: 00010286
[   47.546036] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.546066] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf12834aae00
[   47.546087] RBP: 0000000000000000 R08: ff39bf128371afd0 R09: ff39bf128436d030
[   47.546110] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[   47.546131] R13: 0000000000000011 R14: ff39bf12843ec000 R15: ff39bf12834aae00
[   47.546157] FS:  0000000000000000(0000) GS:ff39bf132e016000(0000) knlGS:0000000000000000
[   47.546181] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.546203] CR2: 00007f4fb4ffd9dc CR3: 0000000037242004 CR4: 0000000000771ef0
[   47.546228] PKRU: 55555554
[   47.546236] Call Trace:
[   47.546244]  <TASK>
[   47.546254]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.546271]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.546287]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.546299]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.546312]  __fput (fs/file_table.c:510)
[   47.546324]  task_work_run (kernel/task_work.c:233)
[   47.546339]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.546352]  ? ___sys_recvmsg (net/socket.c:2961)
[   47.546367]  do_group_exit (kernel/exit.c:1119)
[   47.546377]  get_signal (kernel/signal.c:3037)
[   47.546390]  ? 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))
[   47.546405]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.546421]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.546436]  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)
[   47.546448]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.546463] RIP: 0033:0x4c2d9e
[   47.546475] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.546494] RSP: 002b:00007ffcadb64660 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.546520] RAX: 0000000000000050 RBX: 00007ffcadb646f0 RCX: 00000000004c2d9e
[   47.546542] RDX: 0000000000000000 RSI: 00007ffcadb64700 RDI: 0000000000000007
[   47.546562] RBP: 00007ffcadb64670 R08: 0000000000000000 R09: 0000000000000000
[   47.546586] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffcadb646e4
[   47.546608] R13: 00007ffcadb65288 R14: 00007ffcadb64830 R15: 0000000000543540
| [   47.555207] ------------[ cut here ]------------
| [   47.555251] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 1/65
| [   47.555290] Modules linked in:
| [   47.555343] Tainted: [W]=WARN
[   47.555354] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.555376] Workqueue: netns cleanup_net
[   47.555392] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.555408] 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
[   47.555461] RSP: 0018:ff722176c023fc78 EFLAGS: 00010286
[   47.555478] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.555501] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf12834a6b00
[   47.555524] RBP: 0000000000000000 R08: ff39bf1281d95c50 R09: ff39bf128435582c
[   47.555549] R10: ff39bf12819ad118 R11: fefefefefefefeff R12: 0000000000000000
[   47.555572] R13: 0000000000000011 R14: ff39bf12819ad000 R15: ff39bf12834a6b00
[   47.555596] FS:  0000000000000000(0000) GS:ff39bf132de96000(0000) knlGS:0000000000000000
[   47.555623] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.555640] CR2: 00007f76ba439680 CR3: 0000000037242006 CR4: 0000000000771ef0
[   47.555667] PKRU: 55555554
[   47.555675] Call Trace:
[   47.555687]  <TASK>
[   47.555697]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.555716]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.555734]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.555747]  cleanup_net (net/core/net_namespace.c:702)
[   47.555760]  process_one_work (kernel/workqueue.c:3314)
[   47.555775]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.555786]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.555798]  kthread (kernel/kthread.c:436)
[   47.555819]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.555831]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.555845]  ? 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