======================================
| xx__-> [    8.271825][  T166] ------------[ cut here ]------------
| [    8.272062][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: unshare/166
| [    8.272366][  T166] Modules linked in:
| [    8.273883][  T166] Tainted: [W]=WARN
[    8.274126][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.274416][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.274730][  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
[    8.275291][  T166] RSP: 0018:ffa0000000867ab0 EFLAGS: 00010286
[    8.275597][  T166] RAX: 00000000ffffffa6 RBX: ff110000127d2340 RCX: 1ff400000010cf1c
[    8.275860][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000127d23f0
[    8.276088][  T166] RBP: ff1100000250c000 R08: 1fe22000024fa47f R09: ff11000013640b80
[    8.276321][  T166] R10: 0000000000000002 R11: 0000000000000001 R12: 00000000ffffffff
[    8.276610][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff1100000250c000
[    8.276885][  T166] FS:  00007f535158a740(0000) GS:ff110000a8cd3000(0000) knlGS:0000000000000000
[    8.277151][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.277355][  T166] CR2: 00005642eebe6310 CR3: 00000000049c9003 CR4: 0000000000771ef0
[    8.277605][  T166] PKRU: 55555554
[    8.277742][  T166] Call Trace:
[    8.277880][  T166]  <TASK>
[    8.277989][  T166]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    8.278160][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.278330][  T166]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.278522][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.278664][  T166]  register_netdevice (net/core/dev.c:11488)
[    8.278838][  T166]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.279039][  T166]  register_netdev (net/core/dev.c:11552)
[    8.279208][  T166]  loopback_net_init (drivers/net/loopback.c:218)
[    8.279380][  T166]  ops_init (net/core/net_namespace.c:137)
[    8.279542][  T166]  setup_net (net/core/net_namespace.c:446)
[    8.279706][  T166]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    8.279895][  T166]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    8.280067][  T166]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    8.280242][  T166]  copy_net_ns (net/core/net_namespace.c:579)
[    8.280422][  T166]  create_new_namespaces (kernel/nsproxy.c:132)
[    8.280607][  T166]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    8.280780][  T166]  ksys_unshare (kernel/fork.c:3243)
[    8.280955][  T166]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    8.281131][  T166]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    8.281302][  T166]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    8.281502][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.281672][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.281843][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.282015][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.282215][  T166] RIP: 0033:0x7f5351685bcb
[    8.282399][  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
[    8.282895][  T166] RSP: 002b:00007ffc116da748 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    8.283127][  T166] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5351685bcb
[    8.283357][  T166] RDX: 0000000000000000 RSI: 00007ffc116da4b0 RDI: 0000000040000000
[    8.283600][  T166] RBP: 00007ffc116daad0 R08: 00007ffc116da6a0 R09: 0000000000000000
[    8.283833][  T166] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    8.284062][  T166] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005642eebe9b68
| [    8.311766][  T166] ------------[ cut here ]------------
| [    8.311936][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/166
| [    8.312215][  T166] Modules linked in:
| [    8.312675][  T166] Tainted: [W]=WARN
[    8.312806][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.312995][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.313188][  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
[    8.313653][  T166] RSP: 0018:ffa0000000867b58 EFLAGS: 00010286
[    8.313844][  T166] RAX: 00000000ffffffa6 RBX: ff110000092acdc0 RCX: 1ff400000010cf31
[    8.314057][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000092ace70
[    8.314271][  T166] RBP: ff11000009370000 R08: 1fe22000012559cf R09: ff11000013640b58
[    8.314514][  T166] R10: 0000000000000002 R11: 0000000000000001 R12: 00000000ffffffff
[    8.314729][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000009370000
[    8.314946][  T166] FS:  0000000007c3e400(0000) GS:ff110000a8cd3000(0000) knlGS:0000000000000000
[    8.315193][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.315382][  T166] CR2: 00007feef19d1000 CR3: 0000000005d7e004 CR4: 0000000000771ef0
[    8.315618][  T166] PKRU: 55555554
[    8.315748][  T166] Call Trace:
[    8.315878][  T166]  <TASK>
[    8.315982][  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))
[    8.316142][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.316307][  T166]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.316530][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.316666][  T166]  register_netdevice (net/core/dev.c:11488)
[    8.316830][  T166]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.317017][  T166]  ? alloc_netdev_mqs (net/core/dev.c:12133)
[    8.317180][  T166]  tun_set_iff.constprop.0 (drivers/net/tun.c:2876)
[    8.317344][  T166]  ? tun_attach.isra.0 (./include/linux/ptr_ring.h:601)
[    8.317524][  T166]  ? tun_get (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) drivers/net/tun.c:803 (discriminator 2))
[    8.317658][  T166]  __tun_chr_ioctl (drivers/net/tun.c:3157)
[    8.317818][  T166]  ? build_open_flags (fs/open.c:1212)
[    8.317981][  T166]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    8.318142][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[    8.318305][  T166]  ? __x64_sys_openat (fs/open.c:1370 fs/open.c:1386 fs/open.c:1381 fs/open.c:1381)
[    8.318485][  T166]  ? fput_close_sync (fs/file_table.c:615)
[    8.318650][  T166]  ? __ia32_sys_open (fs/open.c:1374)
[    8.318812][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.318974][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.319134][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.319296][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.319462][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.319660][  T166] RIP: 0033:0x47cc8d
[    8.319797][  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 
[    8.320252][  T166] RSP: 002b:00007ffd6afb96a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.320487][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.320703][  T166] RDX: 00007ffd6afb9720 RSI: 00000000400454ca RDI: 0000000000000005
[    8.320922][  T166] RBP: 00007ffd6afb96f0 R08: 0000000000000000 R09: 0000000000000000
[    8.321137][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6afb9bf8
[    8.321352][  T166] R13: 00007ffd6afb9c80 R14: 0000000000000002 R15: 0000000000543540
| [    8.323283][  T166] ------------[ cut here ]------------
| [    8.323442][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/166
| [    8.323719][  T166] Modules linked in:
| [    8.324155][  T166] Tainted: [W]=WARN
[    8.324287][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.324492][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.324684][  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
[    8.325133][  T166] RSP: 0018:ffa0000000867c58 EFLAGS: 00010286
[    8.325320][  T166] RAX: 00000000ffffffa6 RBX: ff110000092ac040 RCX: 1ff400000010cf51
[    8.325550][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000092ac0f0
[    8.325764][  T166] RBP: ff11000009370000 R08: 1fe220000125581f R09: ff11000013640b58
[    8.325980][  T166] R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000000
[    8.326192][  T166] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000002
[    8.326411][  T166] FS:  0000000007c3e400(0000) GS:ff110000a8cd3000(0000) knlGS:0000000000000000
[    8.326665][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.326856][  T166] CR2: 00007feef19d1000 CR3: 0000000005d7e004 CR4: 0000000000771ef0
[    8.327072][  T166] PKRU: 55555554
[    8.327201][  T166] Call Trace:
[    8.327331][  T166]  <TASK>
[    8.327440][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.327608][  T166]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    8.327770][  T166]  notifier_call_chain (kernel/notifier.c:85)
[    8.327931][  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)
[    8.328092][  T166]  ? netdev_sync_lower_features (net/core/dev.c:10883)
[    8.328280][  T166]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    8.328449][  T166]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    8.328621][  T166]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    8.328784][  T166]  ? update_socket_protocol+0x10/0x10
[    8.328944][  T166]  ? alloc_file_clone (fs/file_table.c:477)
[    8.329106][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.329271][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.329430][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.329601][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.329760][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.329945][  T166] RIP: 0033:0x47cc8d
[    8.330080][  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 
[    8.330549][  T166] RSP: 002b:00007ffd6afb96e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.330765][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.330979][  T166] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    8.331191][  T166] RBP: 00007ffd6afb9730 R08: 0000000000000000 R09: 0000000000000000
[    8.331412][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6afb9bf8
[    8.331633][  T166] R13: 00007ffd6afb9c80 R14: 0000000000000002 R15: 0000000000543540
| [    8.333620][  T166] ------------[ cut here ]------------
| [    8.333781][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/166
| [    8.334064][  T166] Modules linked in:
| [    8.334536][  T166] Tainted: [W]=WARN
[    8.334675][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.334869][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.335073][  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
[    8.335566][  T166] RSP: 0018:ffa0000000867850 EFLAGS: 00010286
[    8.335763][  T166] RAX: 00000000ffffffa6 RBX: ff110000092acac0 RCX: 1ff400000010ced0
[    8.335989][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000092acb70
[    8.336215][  T166] RBP: ff11000009370000 R08: 1fe220000125596f R09: ff11000013640b58
[    8.336449][  T166] R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000001
[    8.336689][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005868900
[    8.336916][  T166] FS:  0000000007c3e400(0000) GS:ff110000a8cd3000(0000) knlGS:0000000000000000
[    8.337172][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.337369][  T166] CR2: 00007feef19d1000 CR3: 0000000005d7e004 CR4: 0000000000771ef0
[    8.337614][  T166] PKRU: 55555554
[    8.337750][  T166] Call Trace:
[    8.337886][  T166]  <TASK>
[    8.337994][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.338163][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.338302][  T166]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    8.338490][  T166]  __dev_notify_flags (net/core/dev.c:9787)
[    8.338657][  T166]  ? netif_change_name (net/core/dev.c:1495)
[    8.338824][  T166]  ? __dev_change_flags (net/core/dev.c:9752)
[    8.338995][  T166]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    8.339163][  T166]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.339331][  T166]  netif_change_flags (net/core/dev.c:9820)
[    8.339517][  T166]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    8.339687][  T166]  dev_change_flags (net/core/dev_api.c:68)
[    8.339856][  T166]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    8.340026][  T166]  ? inet_ifa_byprefix (net/ipv4/devinet.c:619 (discriminator 9))
[    8.340196][  T166]  ? _copy_from_user (./include/linux/instrumented.h:146 ./include/linux/uaccess.h:184 lib/usercopy.c:18)
[    8.340366][  T166]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    8.340523][  T166]  ? inet_dgram_connect (net/ipv4/af_inet.c:589)
[    8.340689][  T166]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    8.340860][  T166]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.341028][  T166]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.341195][  T166]  sock_do_ioctl (net/socket.c:1313)
[    8.341365][  T166]  ? __sock_recv_cmsgs (./include/net/sock.h:2867)
[    8.341554][  T166]  ? ioctl_file_clone (fs/ioctl.c:244)
[    8.341723][  T166]  sock_ioctl (net/socket.c:1434)
[    8.341863][  T166]  ? br_ioctl_call (net/socket.c:1279)
[    8.342032][  T166]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    8.342202][  T166]  ? update_socket_protocol+0x10/0x10
[    8.342401][  T166]  ? alloc_file_clone (fs/file_table.c:477)
[    8.342586][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.342759][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.342927][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.343094][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.343262][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.343463][  T166] RIP: 0033:0x47cc8d
[    8.343614][  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 
[    8.344092][  T166] RSP: 002b:00007ffd6afb96c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.344322][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.344568][  T166] RDX: 00007ffd6afb9730 RSI: 0000000000008914 RDI: 0000000000000006
[    8.344795][  T166] RBP: 00007ffd6afb9710 R08: 0000000000000000 R09: 0000000000000000
[    8.345024][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6afb9bf8
[    8.345251][  T166] R13: 00007ffd6afb9c80 R14: 0000000000000002 R15: 0000000000543540
| [   66.827863][  T166] ------------[ cut here ]------------
| [   66.828086][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/166
| [   66.828397][  T166] Modules linked in:
| [   66.829706][  T166] Tainted: [W]=WARN
[   66.829904][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   66.830206][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   66.830529][  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
[   66.831094][  T166] RSP: 0018:ffa00000008676f0 EFLAGS: 00010286
[   66.831393][  T166] RAX: 00000000ffffffa6 RBX: ff11000011053b40 RCX: 1ff400000010cea4
[   66.831737][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000011053bf0
[   66.832028][  T166] RBP: ff11000009370000 R08: 1fe220000220a77f R09: ff11000013640b58
[   66.832356][  T166] R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000041
[   66.832698][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ffa0000000867790
[   66.832992][  T166] FS:  0000000000000000(0000) GS:ff110000a8cd3000(0000) knlGS:0000000000000000
[   66.833355][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   66.833670][  T166] CR2: 00007f789d0e4ac0 CR3: 0000000004ae9001 CR4: 0000000000771ef0
[   66.833968][  T166] PKRU: 55555554
[   66.834197][  T166] Call Trace:
[   66.834424][  T166]  <TASK>
[   66.834607][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   66.834873][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   66.835103][  T166]  netif_close_many (net/core/dev.c:1804)
[   66.835330][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   66.835616][  T166]  ? __dev_close_many (net/core/dev.c:1781)
[   66.835827][  T166]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   66.836034][  T166]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   66.836243][  T166]  ? select_fallback_rq (kernel/sched/sched.h:1383)
[   66.836419][  T166]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   66.836642][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   66.836817][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   66.836992][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   66.837168][  T166]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   66.837346][  T166]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   66.837532][  T166]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   66.837715][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   66.837892][  T166]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   66.838068][  T166]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   66.838247][  T166]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   66.838421][  T166]  __fput (fs/file_table.c:510)
[   66.838587][  T166]  task_work_run (kernel/task_work.c:233)
[   66.838765][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   66.838940][  T166]  ? task_work_cancel (kernel/task_work.c:190)
[   66.839115][  T166]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   66.839292][  T166]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   66.839437][  T166]  ? exit_notify (kernel/exit.c:748)
[   66.839631][  T166]  do_group_exit (kernel/exit.c:1119)
[   66.839807][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   66.839981][  T166]  get_signal (kernel/signal.c:3037)
[   66.840161][  T166]  ? ptrace_signal (./include/linux/signal.h:87)
[   66.840338][  T166]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   66.840524][  T166]  ? __sys_recvmsg (net/socket.c:2993)
[   66.840709][  T166]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   66.840884][  T166]  ? __sys_recvmsg_sock (net/socket.c:2974)
[   66.841062][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   66.841240][  T166]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   66.841446][  T166]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   66.841636][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   66.841811][  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)
[   66.841987][  T166]  ? irq_exit_rcu (kernel/softirq.c:754)
[   66.842161][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   66.842364][  T166] RIP: 0033:0x4c2d9e
[   66.842521][  T166] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   66.842754][  T166] RSP: 002b:00007ffd6afb9050 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   66.842995][  T166] RAX: 0000000000000014 RBX: 00007ffd6afb90e0 RCX: 00000000004c2d9e
[   66.843233][  T166] RDX: 0000000000000000 RSI: 00007ffd6afb90f0 RDI: 0000000000000007
[   66.843470][  T166] RBP: 00007ffd6afb9060 R08: 0000000000000000 R09: 0000000000000000
[   66.843722][  T166] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd6afb90d4
[   66.843962][  T166] R13: 0000000000000050 R14: 00007ffd6afb9220 R15: 0000000000000000
| [   66.853417][  T166] ------------[ cut here ]------------
| [   66.853669][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/166
| [   66.853981][  T166] Modules linked in:
| [   66.854449][  T166] Tainted: [W]=WARN
[   66.854606][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   66.854808][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   66.855017][  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
[   66.855516][  T166] RSP: 0018:ffa0000000867820 EFLAGS: 00010286
[   66.855726][  T166] RAX: 00000000ffffffa6 RBX: ff1100000928e640 RCX: 1ff400000010ceca
[   66.855958][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000928e6f0
[   66.856187][  T166] RBP: ff11000009370000 R08: 1fe2200001251cdf R09: ff11000013640b58
[   66.856417][  T166] R10: 0000000000000002 R11: 0000000000000001 R12: 00000000ffffffff
[   66.856665][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   66.856899][  T166] FS:  0000000000000000(0000) GS:ff110000a8cd3000(0000) knlGS:0000000000000000
[   66.857164][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   66.857366][  T166] CR2: 00007f789d0e4ac0 CR3: 0000000004ae9001 CR4: 0000000000771ef0
[   66.857615][  T166] PKRU: 55555554
[   66.857754][  T166] Call Trace:
[   66.857894][  T166]  <TASK>
[   66.858004][  T166]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   66.858209][  T166]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   66.858408][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   66.858595][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   66.858769][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   66.858943][  T166]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   66.859117][  T166]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   66.859290][  T166]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   66.859462][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   66.859655][  T166]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   66.859827][  T166]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   66.860001][  T166]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   66.860173][  T166]  __fput (fs/file_table.c:510)
[   66.860320][  T166]  task_work_run (kernel/task_work.c:233)
[   66.860503][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   66.860680][  T166]  ? task_work_cancel (kernel/task_work.c:190)
[   66.860851][  T166]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   66.861024][  T166]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   66.861165][  T166]  ? exit_notify (kernel/exit.c:748)
[   66.861339][  T166]  do_group_exit (kernel/exit.c:1119)
[   66.861520][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   66.861698][  T166]  get_signal (kernel/signal.c:3037)
[   66.861875][  T166]  ? ptrace_signal (./include/linux/signal.h:87)
[   66.862048][  T166]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   66.862219][  T166]  ? __sys_recvmsg (net/socket.c:2993)
[   66.862389][  T166]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   66.862571][  T166]  ? __sys_recvmsg_sock (net/socket.c:2974)
[   66.862751][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   66.862923][  T166]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   66.863125][  T166]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   66.863295][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   66.863468][  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)
[   66.863657][  T166]  ? irq_exit_rcu (kernel/softirq.c:754)
[   66.863831][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   66.864032][  T166] RIP: 0033:0x4c2d9e
[   66.864177][  T166] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   66.864384][  T166] RSP: 002b:00007ffd6afb9050 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   66.864633][  T166] RAX: 0000000000000014 RBX: 00007ffd6afb90e0 RCX: 00000000004c2d9e
[   66.864865][  T166] RDX: 0000000000000000 RSI: 00007ffd6afb90f0 RDI: 0000000000000007
[   66.865098][  T166] RBP: 00007ffd6afb9060 R08: 0000000000000000 R09: 0000000000000000
[   66.865330][  T166] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd6afb90d4
[   66.865574][  T166] R13: 0000000000000050 R14: 00007ffd6afb9220 R15: 0000000000000000
| [   66.886470][   T12] ------------[ cut here ]------------
| [   66.886681][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: 0/12
| [   66.886956][   T12] Modules linked in:
| [   66.887346][   T12] Tainted: [W]=WARN
[   66.887439][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   66.887607][   T12] Workqueue: netns cleanup_net
[   66.887738][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   66.887896][   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
[   66.888317][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   66.888467][   T12] RAX: 00000000ffffffa6 RBX: ff1100000928e1c0 RCX: 1ff4000000018ed5
[   66.888686][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000928e270
[   66.888866][   T12] RBP: ff1100000250c000 R08: 1fe2200001251c4f R09: ff11000001afd1d0
[   66.889045][   T12] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[   66.889223][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   66.889405][   T12] FS:  0000000000000000(0000) GS:ff110000a8bd3000(0000) knlGS:0000000000000000
[   66.889629][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   66.889778][   T12] CR2: 000055a67cb3c99c CR3: 000000000cf39005 CR4: 0000000000771ef0
[   66.889958][   T12] PKRU: 55555554
[   66.890047][   T12] Call Trace:
[   66.890137][   T12]  <TASK>
[   66.890203][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   66.890356][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   66.890512][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   66.890638][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   66.890757][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   66.890874][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   66.890994][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   66.891114][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   66.891233][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   66.891356][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   66.891485][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   66.891608][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   66.891731][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   66.891851][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   66.891966][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   66.892082][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   66.892199][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   66.892321][   T12]  process_one_work (kernel/workqueue.c:3314)
[   66.892445][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   66.892573][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   66.892710][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   66.892834][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   66.892954][   T12]  kthread (kernel/kthread.c:436)
[   66.893045][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   66.893186][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   66.893301][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   66.893418][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   66.893566][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   66.893683][   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