======================================
| xx__-> [    8.561964][  T166] ------------[ cut here ]------------
| [    8.562185][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: unshare/166
| [    8.562489][  T166] Modules linked in:
| [    8.562883][  T166] Tainted: [W]=WARN
[    8.562996][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.563168][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.563342][  T166] 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
[    8.563816][  T166] RSP: 0018:ffa0000000857ab0 EFLAGS: 00010286
[    8.563984][  T166] RAX: 00000000ffffffa6 RBX: ff1100000c41e640 RCX: 1ff400000010af1c
[    8.564176][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000c41e6f0
[    8.564418][  T166] RBP: ff1100000a339000 R08: 1fe2200001883cdf R09: ff1100000c218b80
[    8.564619][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    8.564816][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff1100000a339000
[    8.565011][  T166] FS:  00007f6537d21740(0000) GS:ff1100009bbd3000(0000) knlGS:0000000000000000
[    8.565261][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.565426][  T166] CR2: 00005598fc99a310 CR3: 000000000ce83003 CR4: 0000000000771ef0
[    8.565627][  T166] PKRU: 55555554
[    8.565732][  T166] Call Trace:
[    8.565833][  T166]  <TASK>
[    8.565904][  T166]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    8.566035][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.566163][  T166]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.566330][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.566432][  T166]  register_netdevice (net/core/dev.c:11488)
[    8.566563][  T166]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.566731][  T166]  register_netdev (net/core/dev.c:11552)
[    8.566859][  T166]  loopback_net_init (drivers/net/loopback.c:218)
[    8.566991][  T166]  ops_init (net/core/net_namespace.c:137)
[    8.567091][  T166]  setup_net (net/core/net_namespace.c:446)
[    8.567189][  T166]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    8.567325][  T166]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    8.567458][  T166]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    8.567591][  T166]  copy_net_ns (net/core/net_namespace.c:579)
[    8.567725][  T166]  create_new_namespaces (kernel/nsproxy.c:132)
[    8.567858][  T166]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    8.567986][  T166]  ksys_unshare (kernel/fork.c:3243)
[    8.568117][  T166]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    8.568285][  T166]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    8.568414][  T166]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    8.568544][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.568677][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.568817][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.568953][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.569113][  T166] RIP: 0033:0x7f6537e1cbcb
[    8.569250][  T166] 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
[    8.569744][  T166] RSP: 002b:00007fff1179a0f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    8.569939][  T166] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6537e1cbcb
[    8.570137][  T166] RDX: 0000000000000000 RSI: 00007fff11799e60 RDI: 0000000040000000
[    8.570336][  T166] RBP: 00007fff1179a480 R08: 00007fff1179a050 R09: 0000000000000000
[    8.570528][  T166] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    8.570723][  T166] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005598fc99db68
| [    8.588469][  T166] ------------[ cut here ]------------
| [    8.588631][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [    8.588877][  T166] Modules linked in:
| [    8.589248][  T166] Tainted: [W]=WARN
[    8.589347][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.589505][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.589670][  T166] 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
[    8.590106][  T166] RSP: 0018:ffa0000000857b58 EFLAGS: 00010286
[    8.590266][  T166] RAX: 00000000ffffffa6 RBX: ff1100000adf41c0 RCX: 1ff400000010af31
[    8.590446][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000adf4270
[    8.590626][  T166] RBP: ff1100000a500000 R08: 1fe22000015be84f R09: ff1100000c218b58
[    8.590808][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    8.590991][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff1100000a500000
[    8.591180][  T166] FS:  00000000272aa400(0000) GS:ff1100009bbd3000(0000) knlGS:0000000000000000
[    8.591401][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.591555][  T166] CR2: 00007f6f1b427000 CR3: 0000000004adf004 CR4: 0000000000771ef0
[    8.591748][  T166] PKRU: 55555554
[    8.591839][  T166] Call Trace:
[    8.591931][  T166]  <TASK>
[    8.591994][  T166]  ? 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))
[    8.592116][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.592236][  T166]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.592367][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.592463][  T166]  register_netdevice (net/core/dev.c:11488)
[    8.592590][  T166]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.592748][  T166]  ? alloc_netdev_mqs (net/core/dev.c:12133)
[    8.592872][  T166]  tun_set_iff.constprop.0 (drivers/net/tun.c:2876)
[    8.593002][  T166]  ? tun_attach.isra.0 (./include/linux/ptr_ring.h:601)
[    8.593128][  T166]  ? tun_get (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) drivers/net/tun.c:803 (discriminator 2))
[    8.593221][  T166]  __tun_chr_ioctl (drivers/net/tun.c:3157)
[    8.593347][  T166]  ? build_open_flags (fs/open.c:1212)
[    8.593468][  T166]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    8.593590][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[    8.593716][  T166]  ? __x64_sys_openat (fs/open.c:1370 fs/open.c:1386 fs/open.c:1381 fs/open.c:1381)
[    8.593841][  T166]  ? fput_close_sync (fs/file_table.c:615)
[    8.593966][  T166]  ? __ia32_sys_open (fs/open.c:1374)
[    8.594090][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.594214][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.594348][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.594473][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.594596][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.594747][  T166] RIP: 0033:0x47cc8d
[    8.594842][  T166] 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 
[    8.595275][  T166] RSP: 002b:00007ffd975d0370 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.595479][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.595659][  T166] RDX: 00007ffd975d03f0 RSI: 00000000400454ca RDI: 0000000000000005
[    8.595842][  T166] RBP: 00007ffd975d03c0 R08: 0000000000000000 R09: 0000000000000000
[    8.596024][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd975d08c8
[    8.596210][  T166] R13: 00007ffd975d0950 R14: 0000000000000002 R15: 0000000000543540
| [    8.597840][  T166] ------------[ cut here ]------------
| [    8.597960][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [    8.598203][  T166] Modules linked in:
| [    8.598616][  T166] Tainted: [W]=WARN
[    8.598709][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.598862][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.599023][  T166] 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
[    8.599457][  T166] RSP: 0018:ffa0000000857c58 EFLAGS: 00010286
[    8.599604][  T166] RAX: 00000000ffffffa6 RBX: ff1100000adf4040 RCX: 1ff400000010af51
[    8.599789][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000adf40f0
[    8.599971][  T166] RBP: ff1100000a500000 R08: 1fe22000015be81f R09: ff1100000c218b58
[    8.600150][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
[    8.600331][  T166] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
[    8.600511][  T166] FS:  00000000272aa400(0000) GS:ff1100009bbd3000(0000) knlGS:0000000000000000
[    8.600733][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.600884][  T166] CR2: 00007f6f1b427000 CR3: 0000000004adf004 CR4: 0000000000771ef0
[    8.601073][  T166] PKRU: 55555554
[    8.601162][  T166] Call Trace:
[    8.601258][  T166]  <TASK>
[    8.601322][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.601449][  T166]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    8.601567][  T166]  notifier_call_chain (kernel/notifier.c:85)
[    8.601689][  T166]  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)
[    8.601816][  T166]  ? netdev_sync_lower_features (net/core/dev.c:10883)
[    8.601964][  T166]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    8.602088][  T166]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    8.602212][  T166]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    8.602345][  T166]  ? update_socket_protocol+0x10/0x10
[    8.602466][  T166]  ? alloc_file_clone (fs/file_table.c:477)
[    8.602597][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.602721][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.602839][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.602959][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.603082][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.603235][  T166] RIP: 0033:0x47cc8d
[    8.603336][  T166] 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 
[    8.603770][  T166] RSP: 002b:00007ffd975d03b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.603956][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.604138][  T166] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    8.604327][  T166] RBP: 00007ffd975d0400 R08: 0000000000000005 R09: 0000000000000010
[    8.604508][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd975d08c8
[    8.604694][  T166] R13: 00007ffd975d0950 R14: 0000000000000002 R15: 0000000000543540
| [    8.606499][  T166] ------------[ cut here ]------------
| [    8.606635][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [    8.606897][  T166] Modules linked in:
| [    8.607301][  T166] Tainted: [W]=WARN
[    8.607401][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.607572][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.607741][  T166] 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
[    8.608189][  T166] RSP: 0018:ffa0000000857850 EFLAGS: 00010286
[    8.608361][  T166] RAX: 00000000ffffffa6 RBX: ff1100000adf5e40 RCX: 1ff400000010aed0
[    8.608557][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000adf5ef0
[    8.608756][  T166] RBP: ff1100000a500000 R08: 1fe22000015bebdf R09: ff1100000c218b58
[    8.608950][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
[    8.609140][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005820900
[    8.609350][  T166] FS:  00000000272aa400(0000) GS:ff1100009bbd3000(0000) knlGS:0000000000000000
[    8.609573][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.609734][  T166] CR2: 00007f6f1b427000 CR3: 0000000004adf004 CR4: 0000000000771ef0
[    8.610012][  T166] PKRU: 55555554
[    8.610110][  T166] Call Trace:
[    8.610215][  T166]  <TASK>
[    8.610287][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.610414][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.610595][  T166]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    8.610724][  T166]  __dev_notify_flags (net/core/dev.c:9787)
[    8.610850][  T166]  ? netif_change_name (net/core/dev.c:1495)
[    8.610975][  T166]  ? __dev_change_flags (net/core/dev.c:9752)
[    8.611190][  T166]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    8.611323][  T166]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.611450][  T166]  netif_change_flags (net/core/dev.c:9820)
[    8.611578][  T166]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    8.611794][  T166]  dev_change_flags (net/core/dev_api.c:68)
[    8.611920][  T166]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    8.612050][  T166]  ? inet_ifa_byprefix (net/ipv4/devinet.c:619 (discriminator 9))
[    8.612183][  T166]  ? _copy_from_user (./include/linux/instrumented.h:146 ./include/linux/uaccess.h:184 lib/usercopy.c:18)
[    8.612317][  T166]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    8.612414][  T166]  ? inet_dgram_connect (net/ipv4/af_inet.c:589)
[    8.612539][  T166]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    8.612675][  T166]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.612886][  T166]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.613022][  T166]  sock_do_ioctl (net/socket.c:1313)
[    8.613149][  T166]  ? __sock_recv_cmsgs (./include/net/sock.h:2867)
[    8.613284][  T166]  ? ioctl_file_clone (fs/ioctl.c:244)
[    8.613495][  T166]  sock_ioctl (net/socket.c:1434)
[    8.613592][  T166]  ? br_ioctl_call (net/socket.c:1279)
[    8.613722][  T166]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    8.613850][  T166]  ? update_socket_protocol+0x10/0x10
[    8.613988][  T166]  ? alloc_file_clone (fs/file_table.c:477)
[    8.614199][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.614335][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.614460][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.614589][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.614803][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.614965][  T166] RIP: 0033:0x47cc8d
[    8.615065][  T166] 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 
[    8.615607][  T166] RSP: 002b:00007ffd975d0390 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.615800][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.616082][  T166] RDX: 00007ffd975d0400 RSI: 0000000000008914 RDI: 0000000000000006
[    8.616281][  T166] RBP: 00007ffd975d03e0 R08: 0000000000000005 R09: 0000000000000010
[    8.616556][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd975d08c8
[    8.616746][  T166] R13: 00007ffd975d0950 R14: 0000000000000002 R15: 0000000000543540
| [   98.419220][  T166] ------------[ cut here ]------------
| [   98.420098][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [   98.420492][  T166] Modules linked in:
| [   98.420923][  T166] Tainted: [W]=WARN
[   98.421045][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.421219][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.421474][  T166] 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
[   98.421970][  T166] RSP: 0018:ffa00000008576f0 EFLAGS: 00010286
[   98.422144][  T166] RAX: 00000000ffffffa6 RBX: ff11000008dd6f40 RCX: 1ff400000010aea4
[   98.422444][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000008dd6ff0
[   98.422651][  T166] RBP: ff1100000a500000 R08: 1fe22000011badff R09: ff1100000c218b58
[   98.422856][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000041
[   98.423069][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ffa0000000857790
[   98.423359][  T166] FS:  0000000000000000(0000) GS:ff1100009bbd3000(0000) knlGS:0000000000000000
[   98.423601][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.423776][  T166] CR2: 00007f6f1b427000 CR3: 0000000030939001 CR4: 0000000000771ef0
[   98.423991][  T166] PKRU: 55555554
[   98.424133][  T166] Call Trace:
[   98.424239][  T166]  <TASK>
[   98.424379][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   98.424515][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   98.424617][  T166]  netif_close_many (net/core/dev.c:1804)
[   98.424763][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.424905][  T166]  ? __dev_close_many (net/core/dev.c:1781)
[   98.425048][  T166]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   98.425223][  T166]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   98.425487][  T166]  ? select_fallback_rq (kernel/sched/sched.h:1383)
[   98.425624][  T166]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.425794][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.425935][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.426079][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.426218][  T166]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.426443][  T166]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.426581][  T166]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.426717][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.426856][  T166]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.427000][  T166]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.427143][  T166]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.427351][  T166]  __fput (fs/file_table.c:510)
[   98.427461][  T166]  task_work_run (kernel/task_work.c:233)
[   98.427600][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.427737][  T166]  ? task_work_cancel (kernel/task_work.c:190)
[   98.427875][  T166]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.428020][  T166]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.428127][  T166]  ? exit_notify (kernel/exit.c:748)
[   98.428353][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.428491][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.428627][  T166]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.428765][  T166]  do_group_exit (kernel/exit.c:1119)
[   98.428905][  T166]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.429078][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.429215][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.429434][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.429575][  T166]  get_signal (kernel/signal.c:3037)
[   98.429716][  T166]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.429855][  T166]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.429997][  T166]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.430136][  T166]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.430343][  T166]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.430483][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.430622][  T166]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.430807][  T166]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.430970][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.431148][  T166]  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)
[   98.431372][  T166]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.431526][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.431710][  T166] RIP: 0033:0x4c2d9e
[   98.431833][  T166] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.432064][  T166] RSP: 002b:00007ffd975cfd20 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.432351][  T166] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   98.432562][  T166] RDX: 0000000000000014 RSI: 00007ffd975cfe00 RDI: 0000000000000007
[   98.432796][  T166] RBP: 00007ffd975cfd30 R08: 00007ffd975cfdc0 R09: 000000000000000c
[   98.433009][  T166] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000272b5930
[   98.433220][  T166] R13: 00007ffd975d0950 R14: 00007ffd975cfef0 R15: 0000000000543540
| [   98.438960][  T166] ------------[ cut here ]------------
| [   98.439126][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [   98.439402][  T166] Modules linked in:
| [   98.439811][  T166] Tainted: [W]=WARN
[   98.439914][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.440087][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.440265][  T166] 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
[   98.440747][  T166] RSP: 0018:ffa0000000857820 EFLAGS: 00010286
[   98.443232][  T166] RAX: 00000000ffffffa6 RBX: ff11000008dd7e40 RCX: 1ff400000010aeca
[   98.443527][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000008dd7ef0
[   98.443730][  T166] RBP: ff1100000a500000 R08: 1fe22000011bafdf R09: ff1100000c218b58
[   98.444000][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[   98.444201][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.444457][  T166] FS:  0000000000000000(0000) GS:ff1100009bbd3000(0000) knlGS:0000000000000000
[   98.444690][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.444859][  T166] CR2: 00007f6f1b427000 CR3: 0000000030939001 CR4: 0000000000771ef0
[   98.445066][  T166] PKRU: 55555554
[   98.445164][  T166] Call Trace:
[   98.445315][  T166]  <TASK>
[   98.445384][  T166]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.445554][  T166]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.445717][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.445902][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.446042][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.446178][  T166]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.446366][  T166]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.446500][  T166]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.446633][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.446763][  T166]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.446897][  T166]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.447037][  T166]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.447170][  T166]  __fput (fs/file_table.c:510)
[   98.447328][  T166]  task_work_run (kernel/task_work.c:233)
[   98.447462][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.447594][  T166]  ? task_work_cancel (kernel/task_work.c:190)
[   98.447727][  T166]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.447864][  T166]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.447969][  T166]  ? exit_notify (kernel/exit.c:748)
[   98.448101][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.448236][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.448422][  T166]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.448556][  T166]  do_group_exit (kernel/exit.c:1119)
[   98.448687][  T166]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.448852][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.448985][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.449117][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.449249][  T166]  get_signal (kernel/signal.c:3037)
[   98.449437][  T166]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.449570][  T166]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.449702][  T166]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.449839][  T166]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.449978][  T166]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.450113][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.450246][  T166]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.450468][  T166]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.450601][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.450733][  T166]  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)
[   98.450869][  T166]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.451006][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.451173][  T166] RIP: 0033:0x4c2d9e
[   98.451336][  T166] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.451506][  T166] RSP: 002b:00007ffd975cfd20 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.451709][  T166] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   98.451907][  T166] RDX: 0000000000000014 RSI: 00007ffd975cfe00 RDI: 0000000000000007
[   98.452112][  T166] RBP: 00007ffd975cfd30 R08: 00007ffd975cfdc0 R09: 000000000000000c
[   98.452367][  T166] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000272b5930
[   98.452564][  T166] R13: 00007ffd975d0950 R14: 00007ffd975cfef0 R15: 0000000000543540
| [   98.476483][   T69] ------------[ cut here ]------------
| [   98.476743][   T69] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: 1/69
| [   98.477050][   T69] Modules linked in:
| [   98.477581][   T69] Tainted: [W]=WARN
[   98.477723][   T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.477928][   T69] Workqueue: netns cleanup_net
[   98.478126][   T69] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.478400][   T69] 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
[   98.478891][   T69] RSP: 0018:ffa00000004a7878 EFLAGS: 00010286
[   98.479104][   T69] RAX: 00000000ffffffa6 RBX: ff1100000aea7540 RCX: 1ff4000000094ed5
[   98.479351][   T69] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000aea75f0
[   98.479581][   T69] RBP: ff1100000a339000 R08: 1fe22000015d4ebf R09: ff11000008a751d0
[   98.479810][   T69] R10: 0000000000000002 R11: 0000000000000001 R12: 00000000ffffffff
[   98.480056][   T69] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.480302][   T69] FS:  0000000000000000(0000) GS:ff1100009bcd3000(0000) knlGS:0000000000000000
[   98.480565][   T69] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.480767][   T69] CR2: 00007f654eba7f98 CR3: 0000000030939001 CR4: 0000000000771ef0
[   98.481011][   T69] PKRU: 55555554
[   98.481150][   T69] Call Trace:
[   98.481305][   T69]  <TASK>
[   98.481417][   T69]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.481624][   T69]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.481826][   T69]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   98.482008][   T69]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   98.482181][   T69]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   98.482365][   T69]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   98.482537][   T69]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   98.482709][   T69]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   98.482880][   T69]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   98.483058][   T69]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   98.483234][   T69]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   98.483419][   T69]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.483597][   T69]  cleanup_net (net/core/net_namespace.c:702)
[   98.483768][   T69]  ? net_passive_dec (./include/linux/llist.h:241)
[   98.483938][   T69]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   98.484119][   T69]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   98.484304][   T69]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.484479][   T69]  process_one_work (kernel/workqueue.c:3314)
[   98.484657][   T69]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   98.484832][   T69]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   98.485018][   T69]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   98.485194][   T69]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   98.485382][   T69]  ? __kthread_parkme (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 kernel/kthread.c:272)
[   98.485556][   T69]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   98.485731][   T69]  kthread (kernel/kthread.c:436)
[   98.485872][   T69]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.486082][   T69]  ? kthread_affine_node (kernel/kthread.c:378)
[   98.486271][   T69]  ret_from_fork (arch/x86/kernel/process.c:158)
[   98.486446][   T69]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   98.486647][   T69]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   98.486821][   T69]  ? 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