======================================
| xx__-> [  184.171351] ------------[ cut here ]------------
| [  184.171433] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/337
| [  184.171521] Modules linked in:
| [  184.171674] Tainted: [W]=WARN
[  184.171730] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.171797] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  184.171869] 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
[  184.172005] RSP: 0018:ff73bf80805f7cc8 EFLAGS: 00010286
[  184.172068] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  184.172152] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1350b541d35e00
[  184.172228] RBP: 0000000000000000 R08: ff1350b5430dc5d0 R09: ff1350b541fea02c
[  184.172303] R10: ff1350b544c8b118 R11: fefefefefefefeff R12: 0000000000000000
[  184.172380] R13: 0000000000000010 R14: ff1350b544c8b000 R15: ff1350b541d35e00
[  184.172460] FS:  00007f13f5e8c740(0000) GS:ff1350b5ddd96000(0000) knlGS:0000000000000000
[  184.172541] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.172611] CR2: 000055a9574cb008 CR3: 0000000001cf4004 CR4: 0000000000771ef0
[  184.172689] PKRU: 55555554
[  184.172737] Call Trace:
[  184.172786]  <TASK>
[  184.172835]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  184.172899]  register_netdevice (net/core/dev.c:11488)
[  184.172957]  register_netdev (net/core/dev.c:11552)
[  184.173013]  loopback_net_init (drivers/net/loopback.c:218)
[  184.173073]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[  184.173144]  ops_init (net/core/net_namespace.c:137)
[  184.173209]  setup_net (net/core/net_namespace.c:446)
[  184.173266]  copy_net_ns (net/core/net_namespace.c:579)
[  184.173324]  create_new_namespaces (kernel/nsproxy.c:132)
[  184.173390]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[  184.173453]  ksys_unshare (kernel/fork.c:3243)
[  184.173512]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[  184.173569]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.173627]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  184.173692] RIP: 0033:0x7f13f5f87bcb
[  184.173748] 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
[  184.173890] RSP: 002b:00007fff13dd0c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  184.173967] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f13f5f87bcb
[  184.174043] RDX: 0000000000000000 RSI: 00007fff13dd09a0 RDI: 0000000040000000
[  184.174131] RBP: 00007fff13dd0fc0 R08: 00007fff13dd0b90 R09: 0000000000000000
[  184.174209] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  184.174286] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055a94abf0b68
| [  184.175149] ------------[ cut here ]------------
| [  184.175214] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/337
| [  184.175302] Modules linked in:
| [  184.175452] Tainted: [W]=WARN
[  184.175507] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.175577] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  184.175641] 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
[  184.175772] RSP: 0018:ff73bf80805f7d68 EFLAGS: 00010286
[  184.175835] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  184.175918] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1350b541d35e00
[  184.175994] RBP: 0000000000000000 R08: ff1350b54331bed0 R09: ff1350b544c8f030
[  184.176070] R10: ff1350b54197c118 R11: fefefefefefefeff R12: 0000000000000000
[  184.176149] R13: 0000000000000010 R14: ff1350b54197c000 R15: ff1350b541d35e00
[  184.176227] FS:  0000000003936400(0000) GS:ff1350b5ddd96000(0000) knlGS:0000000000000000
[  184.176303] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.176373] CR2: 00007f7567406000 CR3: 000000000192d005 CR4: 0000000000771ef0
[  184.176452] PKRU: 55555554
[  184.176499] Call Trace:
[  184.176548]  <TASK>
[  184.176596]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  184.176652]  register_netdevice (net/core/dev.c:11488)
[  184.176709]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[  184.176768]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[  184.176827]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  184.176891]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.176949]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  184.177013] RIP: 0033:0x47cc8d
[  184.177068] 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 
[  184.177203] RSP: 002b:00007ffd8ecaaf20 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  184.177279] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  184.177354] RDX: 00007ffd8ecaafa0 RSI: 00000000400454ca RDI: 0000000000000005
[  184.177430] RBP: 00007ffd8ecaaf70 R08: 0000000000000000 R09: 0000000000000000
[  184.177505] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd8ecab478
[  184.177580] R13: 00007ffd8ecab4f8 R14: 0000000000000002 R15: 0000000000543540
| [  184.177785] ------------[ cut here ]------------
| [  184.177846] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/337
| [  184.177938] Modules linked in:
| [  184.178086] Tainted: [W]=WARN
[  184.178149] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.178218] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  184.178281] 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
[  184.178417] RSP: 0018:ff73bf80805f7d60 EFLAGS: 00010286
[  184.178480] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  184.178556] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1350b541d35e00
[  184.178632] RBP: 0000000000000002 R08: ff1350b54331bed0 R09: ff1350b544c8f030
[  184.178707] R10: ff1350b54197c118 R11: fefefefefefefeff R12: 0000000000000000
[  184.178783] R13: 0000000000000010 R14: ff1350b54197c000 R15: ff1350b541d35e00
[  184.178871] FS:  0000000003936400(0000) GS:ff1350b5ddd96000(0000) knlGS:0000000000000000
[  184.178950] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.179018] CR2: 00007f7567406000 CR3: 000000000192d005 CR4: 0000000000771ef0
[  184.179102] PKRU: 55555554
[  184.179150] Call Trace:
[  184.179198]  <TASK>
[  184.179246]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[  184.179305]  notifier_call_chain (kernel/notifier.c:85)
[  184.179363]  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)
[  184.179427]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[  184.179484]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[  184.179542]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  184.179598]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.179655]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  184.179717] RIP: 0033:0x47cc8d
[  184.179773] 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 
[  184.179911] RSP: 002b:00007ffd8ecaaf60 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  184.180012] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  184.180099] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  184.180179] RBP: 00007ffd8ecaafb0 R08: 0000000000000000 R09: 0000000000000000
[  184.180255] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd8ecab478
[  184.180332] R13: 00007ffd8ecab4f8 R14: 0000000000000002 R15: 0000000000543540
| [  184.180537] ------------[ cut here ]------------
| [  184.180600] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/337
| [  184.180684] Modules linked in:
| [  184.180833] Tainted: [W]=WARN
[  184.180906] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.180974] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  184.181037] 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
[  184.181174] RSP: 0018:ff73bf80805f7c10 EFLAGS: 00010286
[  184.181236] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  184.181315] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1350b541d35e00
[  184.181390] RBP: 0000000000000000 R08: ff1350b54331bed0 R09: ff1350b544c8c030
[  184.181466] R10: ff1350b54197c118 R11: fefefefefefefeff R12: 0000000000000000
[  184.181541] R13: 0000000000000010 R14: ff1350b54197c000 R15: ff1350b541d35e00
[  184.181622] FS:  0000000003936400(0000) GS:ff1350b5ddd96000(0000) knlGS:0000000000000000
[  184.181702] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.181772] CR2: 00007f7567406000 CR3: 000000000192d005 CR4: 0000000000771ef0
[  184.181850] PKRU: 55555554
[  184.181904] Call Trace:
[  184.181952]  <TASK>
[  184.182000]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  184.182057]  __dev_notify_flags (net/core/dev.c:9787)
[  184.182122]  netif_change_flags (net/core/dev.c:9820)
[  184.182180]  dev_change_flags (net/core/dev_api.c:68)
[  184.182237]  devinet_ioctl (net/ipv4/devinet.c:1199)
[  184.182298]  inet_ioctl (net/ipv4/af_inet.c:1011)
[  184.182355]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[  184.182413]  sock_do_ioctl (net/socket.c:1313)
[  184.182471]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  184.182527]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.182584]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  184.182647] RIP: 0033:0x47cc8d
[  184.182703] 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 
[  184.182834] RSP: 002b:00007ffd8ecaaf40 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  184.182915] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  184.182992] RDX: 00007ffd8ecaafb0 RSI: 0000000000008914 RDI: 0000000000000006
[  184.183068] RBP: 00007ffd8ecaaf90 R08: 0000000000000000 R09: 0000000000000000
[  184.183150] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd8ecab478
[  184.183225] R13: 00007ffd8ecab4f8 R14: 0000000000000002 R15: 0000000000543540
| [  229.157309] ------------[ cut here ]------------
| [  229.157405] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/337
| [  229.157527] Modules linked in:
| [  229.157696] Tainted: [W]=WARN
[  229.157757] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.157832] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  229.157903] 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
[  229.158042] RSP: 0018:ff73bf80805f7b58 EFLAGS: 00010286
[  229.158377] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  229.158461] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1350b543149700
[  229.158540] RBP: 0000000000000000 R08: ff1350b54331bed0 R09: ff1350b544c8c030
[  229.158624] R10: ff1350b54197c118 R11: fefefefefefefeff R12: 0000000000000000
[  229.158702] R13: 0000000000000010 R14: ff1350b54197c000 R15: ff1350b543149700
[  229.158784] FS:  0000000000000000(0000) GS:ff1350b5ddd96000(0000) knlGS:0000000000000000
[  229.158872] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.158947] CR2: 00007f7567406000 CR3: 0000000029a42006 CR4: 0000000000771ef0
[  229.159053] PKRU: 55555554
[  229.159110] Call Trace:
[  229.159163]  <TASK>
[  229.159217]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  229.159282]  netif_close_many (net/core/dev.c:1804)
[  229.159345]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[  229.159415]  ? __queue_work (kernel/workqueue.c:2401)
[  229.159478]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  229.159543]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  229.159603]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  229.159660]  __fput (fs/file_table.c:510)
[  229.159718]  task_work_run (kernel/task_work.c:233)
[  229.159775]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  229.159834]  do_group_exit (kernel/exit.c:1119)
[  229.159890]  get_signal (kernel/signal.c:3037)
[  229.159948]  ? __d_alloc (fs/dcache.c:1807 (discriminator 11))
[  229.160014]  ? alloc_empty_file (fs/file_table.c:262 (discriminator 11))
[  229.160071]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  229.160142]  ? alloc_file_pseudo (fs/file_table.c:398 fs/file_table.c:425)
[  229.160199]  ? __sys_socket (net/socket.c:575 net/socket.c:1815)
[  229.160257]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  229.160322]  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)
[  229.160381]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  229.160446] RIP: 0033:0x47ea2b
[  229.160503] Code: Unable to access opcode bytes at 0x47ea01.

Code starting with the faulting instruction
===========================================
[  229.160571] RSP: 002b:00007ffd8ecaa9c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  229.160649] RAX: 0000000000000007 RBX: 00007ffd8ecaaaa0 RCX: 000000000047ea2b
[  229.160725] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  229.160801] RBP: 00007ffd8ecaaa00 R08: 0000000000000041 R09: 00000000039373e0
[  229.160877] R10: 0000000000000040 R11: 0000000000000202 R12: 00007ffd8ecab478
[  229.160953] R13: 00007ffd8ecab4f8 R14: 00007ffd8ecaaf78 R15: 0000000000543540
| [  229.161244] ------------[ cut here ]------------
| [  229.161282] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/337
| [  229.161333] Modules linked in:
| [  229.161414] Tainted: [W]=WARN
[  229.161436] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.161471] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  229.161502] 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
[  229.161587] RSP: 0018:ff73bf80805f7bc8 EFLAGS: 00010286
[  229.161615] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  229.161658] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1350b543149b00
[  229.161697] RBP: 0000000000000000 R08: ff1350b54331bed0 R09: ff1350b5471ca830
[  229.161739] R10: ff1350b54197c118 R11: fefefefefefefeff R12: 0000000000000000
[  229.161776] R13: 0000000000000011 R14: ff1350b54197c000 R15: ff1350b543149b00
[  229.161821] FS:  0000000000000000(0000) GS:ff1350b5dde16000(0000) knlGS:0000000000000000
[  229.161865] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.161907] CR2: 00007f3b351a0f98 CR3: 0000000029a42004 CR4: 0000000000771ef0
[  229.161949] PKRU: 55555554
[  229.161969] Call Trace:
[  229.161985]  <TASK>
[  229.162001]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  229.162032]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  229.162060]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  229.162082]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  229.162107]  __fput (fs/file_table.c:510)
[  229.162130]  task_work_run (kernel/task_work.c:233)
[  229.162154]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  229.162177]  do_group_exit (kernel/exit.c:1119)
[  229.162199]  get_signal (kernel/signal.c:3037)
[  229.162219]  ? __d_alloc (fs/dcache.c:1807 (discriminator 11))
[  229.162245]  ? alloc_empty_file (fs/file_table.c:262 (discriminator 11))
[  229.162268]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  229.162299]  ? alloc_file_pseudo (fs/file_table.c:398 fs/file_table.c:425)
[  229.162321]  ? __sys_socket (net/socket.c:575 net/socket.c:1815)
[  229.162343]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  229.162375]  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)
[  229.162395]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  229.162425] RIP: 0033:0x47ea2b
[  229.162450] Code: Unable to access opcode bytes at 0x47ea01.

Code starting with the faulting instruction
===========================================
[  229.162483] RSP: 002b:00007ffd8ecaa9c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  229.162527] RAX: 0000000000000007 RBX: 00007ffd8ecaaaa0 RCX: 000000000047ea2b
[  229.162569] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  229.162611] RBP: 00007ffd8ecaaa00 R08: 0000000000000041 R09: 00000000039373e0
[  229.162652] R10: 0000000000000040 R11: 0000000000000202 R12: 00007ffd8ecab478
[  229.162695] R13: 00007ffd8ecab4f8 R14: 00007ffd8ecaaf78 R15: 0000000000543540
| [  229.176180] ------------[ cut here ]------------
| [  229.176222] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 0/12
| [  229.176287] Modules linked in:
| [  229.176383] Tainted: [W]=WARN
[  229.176406] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.176442] Workqueue: netns cleanup_net
[  229.176468] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  229.176496] 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
[  229.176593] RSP: 0018:ff73bf8080067c78 EFLAGS: 00010286
[  229.176623] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  229.176663] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1350b543149a00
[  229.176714] RBP: 0000000000000000 R08: ff1350b5430dc5d0 R09: ff1350b54778902c
[  229.176757] R10: ff1350b544c8b118 R11: fefefefefefefeff R12: 0000000000000000
[  229.176801] R13: 0000000000000011 R14: ff1350b544c8b000 R15: ff1350b543149a00
[  229.176844] FS:  0000000000000000(0000) GS:ff1350b5ddc96000(0000) knlGS:0000000000000000
[  229.176888] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.176923] CR2: 00007fc2e3ea4f98 CR3: 0000000029a42001 CR4: 0000000000771ef0
[  229.176976] PKRU: 55555554
[  229.176990] Call Trace:
[  229.177002]  <TASK>
[  229.177017]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  229.177047]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[  229.177077]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[  229.177101]  cleanup_net (net/core/net_namespace.c:702)
[  229.177121]  process_one_work (kernel/workqueue.c:3314)
[  229.177146]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[  229.177169]  ? rescuer_thread (kernel/workqueue.c:3672)
[  229.177192]  kthread (kernel/kthread.c:436)
[  229.177214]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[  229.177234]  ret_from_fork (arch/x86/kernel/process.c:158)
[  229.177259]  ? 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