======================================
| xx__-> [    9.119277][  T167] ------------[ cut here ]------------
| [    9.119487][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: unshare/167
| [    9.119821][  T167] Modules linked in:
| [    9.120271][  T167] Tainted: [W]=WARN
[    9.120373][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.120541][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.120724][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  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:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.121218][  T167] RSP: 0018:ffa0000000797ab0 EFLAGS: 00010286
[    9.121389][  T167] RAX: 00000000ffffffa6 RBX: ff1100000cf64f40 RCX: 1ff40000000f2f1c
[    9.121590][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000cf64ff0
[    9.121806][  T167] RBP: ff11000008751000 R08: 1fe22000019ec9ff R09: ff1100000d800b80
[    9.122014][  T167] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    9.122219][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000008751000
[    9.122420][  T167] FS:  00007f7adbc27740(0000) GS:ff1100009b3d3000(0000) knlGS:0000000000000000
[    9.122654][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.122928][  T167] CR2: 000055a7cc9b0310 CR3: 000000000d89d002 CR4: 0000000000771ef0
[    9.123134][  T167] PKRU: 55555554
[    9.123241][  T167] Call Trace:
[    9.123408][  T167]  <TASK>
[    9.123480][  T167]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    9.123617][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.123758][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.123918][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.124021][  T167]  register_netdevice (net/core/dev.c:11488)
[    9.124158][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.124335][  T167]  register_netdev (net/core/dev.c:11552)
[    9.124468][  T167]  loopback_net_init (drivers/net/loopback.c:218)
[    9.124604][  T167]  ops_init (net/core/net_namespace.c:137)
[    9.124711][  T167]  setup_net (net/core/net_namespace.c:446)
[    9.124819][  T167]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    9.124952][  T167]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    9.125087][  T167]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    9.125228][  T167]  copy_net_ns (net/core/net_namespace.c:579)
[    9.125364][  T167]  create_new_namespaces (kernel/nsproxy.c:132)
[    9.125500][  T167]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    9.125636][  T167]  ksys_unshare (kernel/fork.c:3243)
[    9.125784][  T167]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    9.125927][  T167]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    9.126063][  T167]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    9.126209][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.126345][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.126481][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.126615][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.126792][  T167] RIP: 0033:0x7f7adbd22bcb
[    9.126936][  T167] 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
[    9.127420][  T167] RSP: 002b:00007ffd14c37df8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    9.127623][  T167] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7adbd22bcb
[    9.127836][  T167] RDX: 0000000000000000 RSI: 00007ffd14c37b60 RDI: 0000000040000000
[    9.128036][  T167] RBP: 00007ffd14c38180 R08: 00007ffd14c37d50 R09: 0000000000000000
[    9.128244][  T167] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    9.128443][  T167] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055a7cc9b3b68
| [    9.153185][  T167] ------------[ cut here ]------------
| [    9.153354][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/167
| [    9.153603][  T167] Modules linked in:
| [    9.153997][  T167] Tainted: [W]=WARN
[    9.154092][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.154253][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.154417][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  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:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.154872][  T167] RSP: 0018:ffa0000000797b58 EFLAGS: 00010286
[    9.155031][  T167] RAX: 00000000ffffffa6 RBX: ff110000057e4c40 RCX: 1ff40000000f2f31
[    9.155224][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000057e4cf0
[    9.155410][  T167] RBP: ff11000005184000 R08: 1fe2200000afc99f R09: ff1100000d800b58
[    9.155598][  T167] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    9.155794][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005184000
[    9.155986][  T167] FS:  00000000051f4400(0000) GS:ff1100009b3d3000(0000) knlGS:0000000000000000
[    9.156209][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.156366][  T167] CR2: 00007f9a9e657000 CR3: 000000000d4f7003 CR4: 0000000000771ef0
[    9.156559][  T167] PKRU: 55555554
[    9.156651][  T167] Call Trace:
[    9.156750][  T167]  <TASK>
[    9.157211][  T167]  ? ip6_route_dev_notify (./include/net/net_namespace.h:419 (discriminator 1) ./include/linux/netdevice.h:2776 (discriminator 1) net/ipv6/route.c:6476 (discriminator 1))
[    9.157338][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.157462][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.157588][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.157687][  T167]  register_netdevice (net/core/dev.c:11488)
[    9.157825][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.157979][  T167]  ? alloc_netdev_mqs (net/core/dev.c:12133)
[    9.158109][  T167]  tun_set_iff.constprop.0 (drivers/net/tun.c:2876)
[    9.158241][  T167]  ? tun_attach.isra.0 (./include/linux/ptr_ring.h:601)
[    9.158365][  T167]  ? tun_get (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) drivers/net/tun.c:803 (discriminator 2))
[    9.158461][  T167]  __tun_chr_ioctl (drivers/net/tun.c:3157)
[    9.158586][  T167]  ? build_open_flags (fs/open.c:1212)
[    9.158720][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    9.158847][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[    9.158973][  T167]  ? __x64_sys_openat (fs/open.c:1370 fs/open.c:1386 fs/open.c:1381 fs/open.c:1381)
[    9.159098][  T167]  ? fput_close_sync (fs/file_table.c:615)
[    9.159232][  T167]  ? __ia32_sys_open (fs/open.c:1374)
[    9.159356][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.159483][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.159610][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.159739][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.159868][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.160020][  T167] RIP: 0033:0x47cc8d
[    9.160120][  T167] 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 
[    9.160568][  T167] RSP: 002b:00007fff44aeb1b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.160762][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.160957][  T167] RDX: 00007fff44aeb230 RSI: 00000000400454ca RDI: 0000000000000005
[    9.161146][  T167] RBP: 00007fff44aeb200 R08: 0000000000000000 R09: 0000000000000000
[    9.161336][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff44aeb708
[    9.161520][  T167] R13: 00007fff44aeb790 R14: 0000000000000002 R15: 0000000000543540
| [    9.163189][  T167] ------------[ cut here ]------------
| [    9.163311][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/167
| [    9.163549][  T167] Modules linked in:
| [    9.163932][  T167] Tainted: [W]=WARN
[    9.164025][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.164208][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.164367][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  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:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.164809][  T167] RSP: 0018:ffa0000000797c58 EFLAGS: 00010286
[    9.164963][  T167] RAX: 00000000ffffffa6 RBX: ff110000057e5540 RCX: 1ff40000000f2f51
[    9.165146][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000057e55f0
[    9.165333][  T167] RBP: ff11000005184000 R08: 1fe2200000afcabf R09: ff1100000d800b58
[    9.165513][  T167] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
[    9.165701][  T167] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
[    9.165896][  T167] FS:  00000000051f4400(0000) GS:ff1100009b3d3000(0000) knlGS:0000000000000000
[    9.166113][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.166270][  T167] CR2: 00007f9a9e657000 CR3: 000000000d4f7003 CR4: 0000000000771ef0
[    9.166454][  T167] PKRU: 55555554
[    9.166545][  T167] Call Trace:
[    9.166636][  T167]  <TASK>
[    9.166705][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.166835][  T167]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    9.166958][  T167]  notifier_call_chain (kernel/notifier.c:85)
[    9.167088][  T167]  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)
[    9.167215][  T167]  ? netdev_sync_lower_features (net/core/dev.c:10883)
[    9.167375][  T167]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    9.167500][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    9.167624][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    9.167755][  T167]  ? update_socket_protocol+0x10/0x10
[    9.167885][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    9.168010][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.168136][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.168263][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.168387][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.168511][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.168663][  T167] RIP: 0033:0x47cc8d
[    9.168766][  T167] 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 
[    9.169222][  T167] RSP: 002b:00007fff44aeb1f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.169407][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.169588][  T167] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    9.169777][  T167] RBP: 00007fff44aeb240 R08: 0000000000000005 R09: 0000000000001ff0
[    9.169960][  T167] R10: 0000000000000003 R11: 0000000000000246 R12: 00007fff44aeb708
[    9.170144][  T167] R13: 00007fff44aeb790 R14: 0000000000000002 R15: 0000000000543540
| [    9.171871][  T167] ------------[ cut here ]------------
| [    9.172003][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/167
| [    9.172274][  T167] Modules linked in:
| [    9.172678][  T167] Tainted: [W]=WARN
[    9.172784][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.172952][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.173124][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  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:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.173623][  T167] RSP: 0018:ffa0000000797850 EFLAGS: 00010286
[    9.173802][  T167] RAX: 00000000ffffffa6 RBX: ff110000057e5b40 RCX: 1ff40000000f2ed0
[    9.173999][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000057e5bf0
[    9.174204][  T167] RBP: ff11000005184000 R08: 1fe2200000afcb7f R09: ff1100000d800b58
[    9.174400][  T167] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
[    9.174598][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005818900
[    9.174812][  T167] FS:  00000000051f4400(0000) GS:ff1100009b3d3000(0000) knlGS:0000000000000000
[    9.175047][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.175216][  T167] CR2: 00007f9a9e657000 CR3: 000000000d4f7003 CR4: 0000000000771ef0
[    9.175414][  T167] PKRU: 55555554
[    9.175514][  T167] Call Trace:
[    9.175612][  T167]  <TASK>
[    9.175682][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.175819][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.175954][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    9.176087][  T167]  __dev_notify_flags (net/core/dev.c:9787)
[    9.176225][  T167]  ? netif_change_name (net/core/dev.c:1495)
[    9.176358][  T167]  ? __dev_change_flags (net/core/dev.c:9752)
[    9.176496][  T167]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    9.176627][  T167]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.176764][  T167]  netif_change_flags (net/core/dev.c:9820)
[    9.176901][  T167]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    9.177035][  T167]  dev_change_flags (net/core/dev_api.c:68)
[    9.177178][  T167]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    9.177312][  T167]  ? inet_ifa_byprefix (net/ipv4/devinet.c:619 (discriminator 9))
[    9.177444][  T167]  ? _copy_from_user (./include/linux/instrumented.h:146 ./include/linux/uaccess.h:184 lib/usercopy.c:18)
[    9.177579][  T167]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    9.177682][  T167]  ? inet_dgram_connect (net/ipv4/af_inet.c:589)
[    9.177817][  T167]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.177956][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.178089][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.178228][  T167]  sock_do_ioctl (net/socket.c:1313)
[    9.178360][  T167]  ? __sock_recv_cmsgs (./include/net/sock.h:2867)
[    9.178496][  T167]  ? ioctl_file_clone (fs/ioctl.c:244)
[    9.178632][  T167]  sock_ioctl (net/socket.c:1434)
[    9.178738][  T167]  ? br_ioctl_call (net/socket.c:1279)
[    9.178876][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    9.179008][  T167]  ? update_socket_protocol+0x10/0x10
[    9.179138][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    9.179274][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.179407][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.179540][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.179676][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.179814][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.179977][  T167] RIP: 0033:0x47cc8d
[    9.180081][  T167] 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 
[    9.180553][  T167] RSP: 002b:00007fff44aeb1d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.180755][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.180956][  T167] RDX: 00007fff44aeb240 RSI: 0000000000008914 RDI: 0000000000000006
[    9.181153][  T167] RBP: 00007fff44aeb220 R08: 0000000000000005 R09: 0000000000001ff0
[    9.181353][  T167] R10: 0000000000000003 R11: 0000000000000246 R12: 00007fff44aeb708
[    9.181549][  T167] R13: 00007fff44aeb790 R14: 0000000000000002 R15: 0000000000543540
| [   98.954740][  T167] ------------[ cut here ]------------
| [   98.955452][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/167
| [   98.955742][  T167] Modules linked in:
| [   98.956228][  T167] Tainted: [W]=WARN
[   98.956332][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.956502][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.956683][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  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:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   98.957247][  T167] RSP: 0018:ffa00000007976f0 EFLAGS: 00010286
[   98.957422][  T167] RAX: 00000000ffffffa6 RBX: ff11000009044dc0 RCX: 1ff40000000f2ea4
[   98.957631][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000009044e70
[   98.957891][  T167] RBP: ff11000005184000 R08: 1fe22000012089cf R09: ff1100000d800b58
[   98.958097][  T167] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000041
[   98.958303][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ffa0000000797790
[   98.958505][  T167] FS:  0000000000000000(0000) GS:ff1100009b3d3000(0000) knlGS:0000000000000000
[   98.958748][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.958929][  T167] CR2: 000055643bab7170 CR3: 000000000d9cd003 CR4: 0000000000771ef0
[   98.959134][  T167] PKRU: 55555554
[   98.959238][  T167] Call Trace:
[   98.959341][  T167]  <TASK>
[   98.959413][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   98.959551][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   98.959656][  T167]  netif_close_many (net/core/dev.c:1804)
[   98.959804][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.959947][  T167]  ? __dev_close_many (net/core/dev.c:1781)
[   98.960084][  T167]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   98.960253][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   98.960424][  T167]  ? select_fallback_rq (kernel/sched/sched.h:1383)
[   98.960560][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.960750][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.960898][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.961035][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.961172][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.961309][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.961443][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.961581][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.961723][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.961871][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.962009][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.962145][  T167]  __fput (fs/file_table.c:510)
[   98.962253][  T167]  task_work_run (kernel/task_work.c:233)
[   98.962389][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.962523][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   98.962658][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.962807][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.962915][  T167]  ? exit_notify (kernel/exit.c:748)
[   98.963052][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.963187][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.963321][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.963457][  T167]  do_group_exit (kernel/exit.c:1119)
[   98.963595][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.963776][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.963915][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.964050][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.964185][  T167]  get_signal (kernel/signal.c:3037)
[   98.964322][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.964458][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.964594][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.964736][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.964888][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.965031][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.965171][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.965344][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.965480][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.965616][  T167]  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)
[   98.965757][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.965903][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.966073][  T167] RIP: 0033:0x4c2d9e
[   98.966184][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.966372][  T167] RSP: 002b:00007fff44aeab60 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.966577][  T167] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   98.966787][  T167] RDX: 0000000000000014 RSI: 00007fff44aeac40 RDI: 0000000000000007
[   98.966997][  T167] RBP: 00007fff44aeab70 R08: 00007fff44aeac00 R09: 000000000000000c
[   98.967201][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000051fe1d0
[   98.967406][  T167] R13: 00007fff44aeb790 R14: 00007fff44aead30 R15: 0000000000543540
| [   98.977097][  T167] ------------[ cut here ]------------
| [   98.977276][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/167
| [   98.977545][  T167] Modules linked in:
| [   98.977968][  T167] Tainted: [W]=WARN
[   98.978069][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.978249][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.978428][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  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:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   98.978917][  T167] RSP: 0018:ffa0000000797820 EFLAGS: 00010286
[   98.979084][  T167] RAX: 00000000ffffffa6 RBX: ff11000009045cc0 RCX: 1ff40000000f2eca
[   98.979282][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000009045d70
[   98.979480][  T167] RBP: ff11000005184000 R08: 1fe2200001208baf R09: ff1100000d800b58
[   98.979680][  T167] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[   98.979942][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.980141][  T167] FS:  0000000000000000(0000) GS:ff1100009b3d3000(0000) knlGS:0000000000000000
[   98.980374][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.980543][  T167] CR2: 000055643bab7170 CR3: 000000000d9cd003 CR4: 0000000000771ef0
[   98.980746][  T167] PKRU: 55555554
[   98.980856][  T167] Call Trace:
[   98.980955][  T167]  <TASK>
[   98.981024][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.981197][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.981362][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.981496][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.981630][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.981817][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.981960][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.982093][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.982226][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.982362][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.982495][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.982632][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.982776][  T167]  __fput (fs/file_table.c:510)
[   98.982892][  T167]  task_work_run (kernel/task_work.c:233)
[   98.983024][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.983159][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   98.983292][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.983429][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.983531][  T167]  ? exit_notify (kernel/exit.c:748)
[   98.983666][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.983808][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.983956][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.984091][  T167]  do_group_exit (kernel/exit.c:1119)
[   98.984223][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.984386][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.984517][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.984650][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.984796][  T167]  get_signal (kernel/signal.c:3037)
[   98.984938][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.985073][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.985206][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.985341][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.985475][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.985612][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.985746][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.985920][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.986052][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.986196][  T167]  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)
[   98.986334][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.986467][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.986638][  T167] RIP: 0033:0x4c2d9e
[   98.986748][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.986927][  T167] RSP: 002b:00007fff44aeab60 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.987148][  T167] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   98.987347][  T167] RDX: 0000000000000014 RSI: 00007fff44aeac40 RDI: 0000000000000007
[   98.987548][  T167] RBP: 00007fff44aeab70 R08: 00007fff44aeac00 R09: 000000000000000c
[   98.987748][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000051fe1d0
[   98.987957][  T167] R13: 00007fff44aeb790 R14: 00007fff44aead30 R15: 0000000000543540
| [   99.003962][   T12] ------------[ cut here ]------------
| [   99.004154][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: 0/12
| [   99.004441][   T12] Modules linked in:
| [   99.004918][   T12] Tainted: [W]=WARN
[   99.005012][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   99.005170][   T12] Workqueue: netns cleanup_net
[   99.005324][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   99.005492][   T12] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  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:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   99.006000][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   99.006160][   T12] RAX: 00000000ffffffa6 RBX: ff1100000a3c3cc0 RCX: 1ff4000000018ed5
[   99.006345][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000a3c3d70
[   99.006529][   T12] RBP: ff11000008751000 R08: 1fe22000014787af R09: ff11000001afd1d0
[   99.006748][   T12] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff
[   99.006961][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   99.007146][   T12] FS:  0000000000000000(0000) GS:ff1100009b453000(0000) knlGS:0000000000000000
[   99.007365][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   99.007519][   T12] CR2: 00007f32a14ee6f0 CR3: 000000000c827004 CR4: 0000000000771ef0
[   99.007710][   T12] PKRU: 55555554
[   99.007810][   T12] Call Trace:
[   99.007908][   T12]  <TASK>
[   99.007973][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   99.008133][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   99.008287][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   99.008414][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   99.008537][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   99.008671][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   99.008803][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   99.008932][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   99.009055][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   99.009180][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   99.009306][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   99.009429][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.009558][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   99.009684][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   99.009813][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   99.009943][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   99.010066][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.010198][   T12]  process_one_work (kernel/workqueue.c:3314)
[   99.010325][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   99.010449][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   99.010578][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   99.010712][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   99.010847][   T12]  kthread (kernel/kthread.c:436)
[   99.010941][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   99.011112][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   99.011237][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   99.011364][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   99.011520][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   99.011644][   T12]  ? kthread_affine_node (kernel/kthread.c:378)


Finger prints:
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:unregister_netdevice_many_notify:unregister_netdevice_queue:__tun_detach:tun_chr_close
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:netif_close_many:unregister_netdevice_many_notify:unregister_netdevice_queue
rtmsg_ifinfo_build_skb:rtnetlink_event:notifier_call_chain:netdev_update_features:__tun_chr_ioctl
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:__dev_notify_flags:netif_change_flags:dev_change_flags
rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:default_device_exit_batch:ops_undo_list:cleanup_net