======================================
| xx__-> [    9.090580][  T167] ------------[ cut here ]------------
| [    9.090834][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: unshare/167
| [    9.091105][  T167] Modules linked in:
| [    9.091538][  T167] Tainted: [W]=WARN
[    9.091639][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.091834][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.092007][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.092580][  T167] RSP: 0018:ffa0000000867ab0 EFLAGS: 00010286
[    9.092752][  T167] RAX: 00000000ffffffa6 RBX: ff11000008fe53c0 RCX: 1ff400000010cf1c
[    9.092956][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000008fe5470
[    9.093241][  T167] RBP: ff11000008a5c000 R08: 1fe22000011fca8f R09: ff11000004b60b80
[    9.093442][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[    9.093642][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000008a5c000
[    9.093938][  T167] FS:  00007f3818362740(0000) GS:ff11000099b53000(0000) knlGS:0000000000000000
[    9.094174][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.094429][  T167] CR2: 000055ea4f01a310 CR3: 0000000004bef003 CR4: 0000000000771ef0
[    9.094634][  T167] PKRU: 55555554
[    9.094737][  T167] Call Trace:
[    9.094838][  T167]  <TASK>
[    9.094909][  T167]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    9.095130][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.095264][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.095400][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.095504][  T167]  register_netdevice (net/core/dev.c:11488)
[    9.095729][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.095896][  T167]  register_netdev (net/core/dev.c:11552)
[    9.096026][  T167]  loopback_net_init (drivers/net/loopback.c:218)
[    9.096160][  T167]  ops_init (net/core/net_namespace.c:137)
[    9.096348][  T167]  setup_net (net/core/net_namespace.c:446)
[    9.096451][  T167]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    9.096592][  T167]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    9.096737][  T167]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    9.096958][  T167]  copy_net_ns (net/core/net_namespace.c:579)
[    9.097089][  T167]  create_new_namespaces (kernel/nsproxy.c:132)
[    9.097223][  T167]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    9.097353][  T167]  ksys_unshare (kernel/fork.c:3243)
[    9.097579][  T167]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    9.097720][  T167]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    9.097857][  T167]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    9.097990][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.098209][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.098341][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.098473][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.098642][  T167] RIP: 0033:0x7f381845dbcb
[    9.098878][  T167] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 2d 82 0f 00 	mov    0xf822d(%rip),%rcx        # 0xf8237
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf8237
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf820d
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    9.099442][  T167] RSP: 002b:00007ffdf5de33d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    9.099643][  T167] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f381845dbcb
[    9.099843][  T167] RDX: 0000000000000000 RSI: 00007ffdf5de3140 RDI: 0000000040000000
[    9.100129][  T167] RBP: 00007ffdf5de3760 R08: 00007ffdf5de3330 R09: 0000000000000000
[    9.100327][  T167] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    9.100528][  T167] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055ea4f01db68
| [    9.120626][  T167] ------------[ cut here ]------------
| [    9.120975][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [    9.121222][  T167] Modules linked in:
| [    9.121601][  T167] Tainted: [W]=WARN
[    9.121693][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.121851][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.122010][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.122437][  T167] RSP: 0018:ffa0000000867b58 EFLAGS: 00010286
[    9.122591][  T167] RAX: 00000000ffffffa6 RBX: ff11000008ff01c0 RCX: 1ff400000010cf31
[    9.122787][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000008ff0270
[    9.122967][  T167] RBP: ff11000004af8000 R08: 1fe22000011fe04f R09: ff11000004b60b58
[    9.123147][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[    9.123327][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000004af8000
[    9.123514][  T167] FS:  000000001a3bc400(0000) GS:ff11000099b53000(0000) knlGS:0000000000000000
[    9.123732][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.123885][  T167] CR2: 00007facecfce000 CR3: 000000000c70e004 CR4: 0000000000771ef0
[    9.124067][  T167] PKRU: 55555554
[    9.124176][  T167] Call Trace:
[    9.124268][  T167]  <TASK>
[    9.124331][  T167]  ? ip6_route_dev_notify (./include/net/net_namespace.h:419 (discriminator 1) ./include/linux/netdevice.h:2776 (discriminator 1) net/ipv6/route.c:6476 (discriminator 1))
[    9.124456][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.124582][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.124703][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.124799][  T167]  register_netdevice (net/core/dev.c:11488)
[    9.124924][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.125074][  T167]  ? alloc_netdev_mqs (net/core/dev.c:12133)
[    9.125200][  T167]  tun_set_iff.constprop.0 (drivers/net/tun.c:2876)
[    9.125324][  T167]  ? tun_attach.isra.0 (./include/linux/ptr_ring.h:601)
[    9.125447][  T167]  ? tun_get (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) drivers/net/tun.c:803 (discriminator 2))
[    9.125542][  T167]  __tun_chr_ioctl (drivers/net/tun.c:3157)
[    9.125663][  T167]  ? build_open_flags (fs/open.c:1212)
[    9.125792][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    9.125913][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[    9.126042][  T167]  ? __x64_sys_openat (fs/open.c:1370 fs/open.c:1386 fs/open.c:1381 fs/open.c:1381)
[    9.126161][  T167]  ? fput_close_sync (fs/file_table.c:615)
[    9.126284][  T167]  ? __ia32_sys_open (fs/open.c:1374)
[    9.126405][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.126531][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.126650][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.126774][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.126894][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.127043][  T167] RIP: 0033:0x47cc8d
[    9.127140][  T167] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    9.127569][  T167] RSP: 002b:00007ffee59697f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.127756][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.127940][  T167] RDX: 00007ffee5969870 RSI: 00000000400454ca RDI: 0000000000000005
[    9.128123][  T167] RBP: 00007ffee5969840 R08: 0000000000000000 R09: 0000000000000000
[    9.128306][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffee5969d48
[    9.128485][  T167] R13: 00007ffee5969dd0 R14: 0000000000000002 R15: 0000000000543540
| [    9.130118][  T167] ------------[ cut here ]------------
| [    9.130235][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [    9.130466][  T167] Modules linked in:
| [    9.130841][  T167] Tainted: [W]=WARN
[    9.130930][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.131081][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.131236][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.131662][  T167] RSP: 0018:ffa0000000867c58 EFLAGS: 00010286
[    9.131815][  T167] RAX: 00000000ffffffa6 RBX: ff11000008ff1840 RCX: 1ff400000010cf51
[    9.131997][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000008ff18f0
[    9.132173][  T167] RBP: ff11000004af8000 R08: 1fe22000011fe31f R09: ff11000004b60b58
[    9.132348][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000000
[    9.132528][  T167] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000003
[    9.132709][  T167] FS:  000000001a3bc400(0000) GS:ff11000099b53000(0000) knlGS:0000000000000000
[    9.132921][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.133069][  T167] CR2: 00007facecfce000 CR3: 000000000c70e004 CR4: 0000000000771ef0
[    9.133249][  T167] PKRU: 55555554
[    9.133337][  T167] Call Trace:
[    9.133425][  T167]  <TASK>
[    9.133486][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.133612][  T167]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    9.133735][  T167]  notifier_call_chain (kernel/notifier.c:85)
[    9.133857][  T167]  netdev_update_features (net/core/dev.c:2287 net/core/dev.c:2301 net/core/dev.c:1590 net/core/dev.c:11099 net/core/dev.c:11096)
[    9.133976][  T167]  ? netdev_sync_lower_features (net/core/dev.c:10883)
[    9.134124][  T167]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    9.134246][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    9.134364][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    9.134486][  T167]  ? update_socket_protocol+0x10/0x10
[    9.134610][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    9.134737][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.134858][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.134976][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.135097][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.135217][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.135365][  T167] RIP: 0033:0x47cc8d
[    9.135459][  T167] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    9.135890][  T167] RSP: 002b:00007ffee5969830 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.136068][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.136246][  T167] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    9.136421][  T167] RBP: 00007ffee5969880 R08: 0000000000000000 R09: 0000000000000000
[    9.136604][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffee5969d48
[    9.136791][  T167] R13: 00007ffee5969dd0 R14: 0000000000000002 R15: 0000000000543540
| [    9.138612][  T167] ------------[ cut here ]------------
| [    9.138747][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [    9.139076][  T167] Modules linked in:
| [    9.139559][  T167] Tainted: [W]=WARN
[    9.139654][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.139816][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.139979][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    9.140525][  T167] RSP: 0018:ffa0000000867850 EFLAGS: 00010286
[    9.140773][  T167] RAX: 00000000ffffffa6 RBX: ff11000008ff0040 RCX: 1ff400000010ced0
[    9.140961][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000008ff00f0
[    9.141152][  T167] RBP: ff11000004af8000 R08: 1fe22000011fe01f R09: ff11000004b60b58
[    9.141425][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000001
[    9.141623][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005770900
[    9.141903][  T167] FS:  000000001a3bc400(0000) GS:ff11000099b53000(0000) knlGS:0000000000000000
[    9.142125][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.142285][  T167] CR2: 00007facecfce000 CR3: 000000000c70e004 CR4: 0000000000771ef0
[    9.142562][  T167] PKRU: 55555554
[    9.142656][  T167] Call Trace:
[    9.142755][  T167]  <TASK>
[    9.142820][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.142947][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.143137][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    9.143271][  T167]  __dev_notify_flags (net/core/dev.c:9787)
[    9.143403][  T167]  ? netif_change_name (net/core/dev.c:1495)
[    9.143534][  T167]  ? __dev_change_flags (net/core/dev.c:9752)
[    9.143749][  T167]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    9.143875][  T167]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.144003][  T167]  netif_change_flags (net/core/dev.c:9820)
[    9.144136][  T167]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    9.144350][  T167]  dev_change_flags (net/core/dev_api.c:68)
[    9.144476][  T167]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    9.144609][  T167]  ? inet_ifa_byprefix (net/ipv4/devinet.c:619 (discriminator 9))
[    9.144740][  T167]  ? _copy_from_user (./include/linux/instrumented.h:146 ./include/linux/uaccess.h:184 lib/usercopy.c:18)
[    9.144951][  T167]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    9.145054][  T167]  ? inet_dgram_connect (net/ipv4/af_inet.c:589)
[    9.145181][  T167]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.145313][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.145442][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.145658][  T167]  sock_do_ioctl (net/socket.c:1313)
[    9.145790][  T167]  ? __sock_recv_cmsgs (./include/net/sock.h:2867)
[    9.145919][  T167]  ? ioctl_file_clone (fs/ioctl.c:244)
[    9.146055][  T167]  sock_ioctl (net/socket.c:1434)
[    9.146236][  T167]  ? br_ioctl_call (net/socket.c:1279)
[    9.146366][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    9.146494][  T167]  ? update_socket_protocol+0x10/0x10
[    9.146628][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    9.146845][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.146971][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.147103][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.147231][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.147440][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.147600][  T167] RIP: 0033:0x47cc8d
[    9.147705][  T167] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    9.148257][  T167] RSP: 002b:00007ffee5969810 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.148447][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.148733][  T167] RDX: 00007ffee5969880 RSI: 0000000000008914 RDI: 0000000000000006
[    9.148921][  T167] RBP: 00007ffee5969860 R08: 0000000000000000 R09: 0000000000000000
[    9.149204][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffee5969d48
[    9.149392][  T167] R13: 00007ffee5969dd0 R14: 0000000000000002 R15: 0000000000543540
| [   98.898296][  T167] ------------[ cut here ]------------
| [   98.898487][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [   98.899398][  T167] Modules linked in:
| [   98.899915][  T167] Tainted: [W]=WARN
[   98.900019][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.900192][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.900376][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   98.900966][  T167] RSP: 0018:ffa00000008676f0 EFLAGS: 00010286
[   98.901139][  T167] RAX: 00000000ffffffa6 RBX: ff11000004e976c0 RCX: 1ff400000010cea4
[   98.901419][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000004e97770
[   98.901624][  T167] RBP: ff11000004af8000 R08: 1fe22000009d2eef R09: ff11000004b60b58
[   98.901912][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000041
[   98.902116][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ffa0000000867790
[   98.902325][  T167] FS:  0000000000000000(0000) GS:ff11000099b53000(0000) knlGS:0000000000000000
[   98.902569][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.902840][  T167] CR2: 0000561be0266bc8 CR3: 0000000027139002 CR4: 0000000000771ef0
[   98.903047][  T167] PKRU: 55555554
[   98.903151][  T167] Call Trace:
[   98.903256][  T167]  <TASK>
[   98.903327][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   98.903469][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   98.903573][  T167]  netif_close_many (net/core/dev.c:1804)
[   98.903713][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.903932][  T167]  ? __dev_close_many (net/core/dev.c:1781)
[   98.904070][  T167]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   98.904244][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   98.904415][  T167]  ? select_fallback_rq (kernel/sched/sched.h:1383)
[   98.904552][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.904887][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.905025][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.905162][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.905303][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.905444][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.905585][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.905915][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.906054][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.906199][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.906340][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.906477][  T167]  __fput (fs/file_table.c:510)
[   98.906585][  T167]  task_work_run (kernel/task_work.c:233)
[   98.906797][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.906935][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   98.907074][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.907307][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.907412][  T167]  ? exit_notify (kernel/exit.c:748)
[   98.907547][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.907691][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.907992][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.908131][  T167]  do_group_exit (kernel/exit.c:1119)
[   98.908268][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.908441][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.908579][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.908715][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.908963][  T167]  get_signal (kernel/signal.c:3037)
[   98.909102][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.909238][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.909375][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.909514][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.909657][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.909810][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.909949][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.910124][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.910264][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.910402][  T167]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   98.910542][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.910684][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.910866][  T167] RIP: 0033:0x4c2d9e
[   98.910977][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.911167][  T167] RSP: 002b:00007ffee59691a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.911377][  T167] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   98.911582][  T167] RDX: 0000000000000014 RSI: 00007ffee5969280 RDI: 0000000000000007
[   98.911798][  T167] RBP: 00007ffee59691b0 R08: 00007ffee5969240 R09: 000000000000000c
[   98.912004][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 000000001a3c5f40
[   98.912206][  T167] R13: 00007ffee5969dd0 R14: 00007ffee5969370 R15: 0000000000543540
| [   98.917881][  T167] ------------[ cut here ]------------
| [   98.918037][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [   98.918304][  T167] Modules linked in:
| [   98.918711][  T167] Tainted: [W]=WARN
[   98.919516][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.919686][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.919871][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   98.920351][  T167] RSP: 0018:ffa0000000867820 EFLAGS: 00010286
[   98.920519][  T167] RAX: 00000000ffffffa6 RBX: ff1100000515d9c0 RCX: 1ff400000010ceca
[   98.920718][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000515da70
[   98.920928][  T167] RBP: ff11000004af8000 R08: 1fe2200000a2bb4f R09: ff11000004b60b58
[   98.921133][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[   98.921363][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.921591][  T167] FS:  0000000000000000(0000) GS:ff11000099b53000(0000) knlGS:0000000000000000
[   98.921858][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.922054][  T167] CR2: 0000561be0266bc8 CR3: 0000000027139002 CR4: 0000000000771ef0
[   98.922279][  T167] PKRU: 55555554
[   98.922378][  T167] Call Trace:
[   98.922484][  T167]  <TASK>
[   98.922553][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.922746][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.922952][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.923097][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.923231][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.923365][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.923499][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.923634][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.923770][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.923908][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.924044][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.924177][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.924312][  T167]  __fput (fs/file_table.c:510)
[   98.924416][  T167]  task_work_run (kernel/task_work.c:233)
[   98.924556][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.924690][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   98.924833][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.924965][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.925063][  T167]  ? exit_notify (kernel/exit.c:748)
[   98.925192][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.925321][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.925448][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.925577][  T167]  do_group_exit (kernel/exit.c:1119)
[   98.925706][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.925882][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.926010][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.926140][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.926267][  T167]  get_signal (kernel/signal.c:3037)
[   98.926399][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.926527][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.926656][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.926797][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.926929][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.927061][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.927191][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.927351][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.927479][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.927610][  T167]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   98.927746][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.927880][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.928042][  T167] RIP: 0033:0x4c2d9e
[   98.928145][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.928311][  T167] RSP: 002b:00007ffee59691a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.928503][  T167] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   98.928693][  T167] RDX: 0000000000000014 RSI: 00007ffee5969280 RDI: 0000000000000007
[   98.928904][  T167] RBP: 00007ffee59691b0 R08: 00007ffee5969240 R09: 000000000000000c
[   98.929096][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 000000001a3c5f40
[   98.929287][  T167] R13: 00007ffee5969dd0 R14: 00007ffee5969370 R15: 0000000000543540
| [   98.954926][   T12] ------------[ cut here ]------------
| [   98.955110][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: 0/12
| [   98.955389][   T12] Modules linked in:
| [   98.955822][   T12] Tainted: [W]=WARN
[   98.955928][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.956074][   T12] Workqueue: netns cleanup_net
[   98.956207][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.956361][   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
[   98.957031][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   98.957186][   T12] RAX: 00000000ffffffa6 RBX: ff1100000515cdc0 RCX: 1ff4000000018ed5
[   98.957359][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000515ce70
[   98.957533][   T12] RBP: ff11000008a5c000 R08: 1fe2200000a2b9cf R09: ff11000001afd1d0
[   98.957709][   T12] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[   98.957903][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.958084][   T12] FS:  0000000000000000(0000) GS:ff110000999d3000(0000) knlGS:0000000000000000
[   98.958291][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.958440][   T12] CR2: 00007f2556ae0680 CR3: 0000000027139006 CR4: 0000000000771ef0
[   98.958618][   T12] PKRU: 55555554
[   98.958708][   T12] Call Trace:
[   98.958810][   T12]  <TASK>
[   98.958872][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.959026][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.959178][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   98.959298][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   98.959416][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   98.959533][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   98.959650][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   98.959782][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   98.959902][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   98.960027][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   98.960150][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   98.960268][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.960390][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   98.960508][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   98.960625][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   98.960750][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   98.960875][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.960996][   T12]  process_one_work (kernel/workqueue.c:3314)
[   98.961117][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   98.961237][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   98.961358][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   98.961483][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   98.961601][   T12]  kthread (kernel/kthread.c:436)
[   98.961691][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.961849][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   98.961968][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   98.962091][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   98.962239][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   98.962357][   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