======================================
| xx__-> [    9.569860][  T167] ------------[ cut here ]------------
| [    9.570194][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: unshare/167
| [    9.570721][  T167] Modules linked in:
| [    9.571351][  T167] Tainted: [W]=WARN
[    9.571503][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.571761][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.572039][  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
[    9.572861][  T167] RSP: 0018:ffa0000000807ab0 EFLAGS: 00010286
[    9.573130][  T167] RAX: 00000000ffffffa6 RBX: ff1100000d9d24c0 RCX: 1ff4000000100f1c
[    9.573449][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000d9d2570
[    9.573767][  T167] RBP: ff11000008869000 R08: 1fe2200001b3a4af R09: ff1100000c2bae80
[    9.574088][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[    9.574410][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000008869000
[    9.574726][  T167] FS:  00007f26f353c740(0000) GS:ff110000a3f53000(0000) knlGS:0000000000000000
[    9.575099][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.575370][  T167] CR2: 00005605569b4310 CR3: 000000000daa7003 CR4: 0000000000771ef0
[    9.575685][  T167] PKRU: 55555554
[    9.575845][  T167] Call Trace:
[    9.576002][  T167]  <TASK>
[    9.576116][  T167]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    9.576337][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.576548][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.576760][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.576930][  T167]  register_netdevice (net/core/dev.c:11488)
[    9.577150][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.577429][  T167]  register_netdev (net/core/dev.c:11552)
[    9.577641][  T167]  loopback_net_init (drivers/net/loopback.c:218)
[    9.577860][  T167]  ops_init (net/core/net_namespace.c:137)
[    9.578029][  T167]  setup_net (net/core/net_namespace.c:446)
[    9.578208][  T167]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    9.578441][  T167]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    9.578682][  T167]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    9.578919][  T167]  copy_net_ns (net/core/net_namespace.c:579)
[    9.579153][  T167]  create_new_namespaces (kernel/nsproxy.c:132)
[    9.579386][  T167]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    9.579595][  T167]  ksys_unshare (kernel/fork.c:3243)
[    9.579807][  T167]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    9.580031][  T167]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    9.580243][  T167]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    9.580462][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.580671][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.580885][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.581097][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.581365][  T167] RIP: 0033:0x7f26f3637bcb
[    9.581587][  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
[    9.582346][  T167] RSP: 002b:00007fff14c279b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    9.582664][  T167] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f26f3637bcb
[    9.582982][  T167] RDX: 0000000000000000 RSI: 00007fff14c27720 RDI: 0000000040000000
[    9.583299][  T167] RBP: 00007fff14c27d40 R08: 00007fff14c27910 R09: 0000000000000000
[    9.583621][  T167] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    9.583941][  T167] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005605569b7b68
| [    9.613137][  T167] ------------[ cut here ]------------
| [    9.613357][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [    9.613735][  T167] Modules linked in:
| [    9.614336][  T167] Tainted: [W]=WARN
[    9.614483][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.614728][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.614983][  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
[    9.615670][  T167] RSP: 0018:ffa0000000807b58 EFLAGS: 00010286
[    9.615917][  T167] RAX: 00000000ffffffa6 RBX: ff110000056dfe40 RCX: 1ff4000000100f31
[    9.616206][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000056dfef0
[    9.616499][  T167] RBP: ff11000005340000 R08: 1fe2200000adbfdf R09: ff1100000c2bae58
[    9.616784][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[    9.617074][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005340000
[    9.617368][  T167] FS:  00000000053ab400(0000) GS:ff110000a3f53000(0000) knlGS:0000000000000000
[    9.617700][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.617946][  T167] CR2: 00007f239406f000 CR3: 000000000dabe004 CR4: 0000000000771ef0
[    9.618233][  T167] PKRU: 55555554
[    9.618385][  T167] Call Trace:
[    9.618527][  T167]  <TASK>
[    9.618630][  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))
[    9.618821][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.619016][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.619209][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.619364][  T167]  register_netdevice (net/core/dev.c:11488)
[    9.619555][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.619790][  T167]  ? alloc_netdev_mqs (net/core/dev.c:12133)
[    9.619995][  T167]  tun_set_iff.constprop.0 (drivers/net/tun.c:2876)
[    9.620190][  T167]  ? tun_attach.isra.0 (./include/linux/ptr_ring.h:601)
[    9.620389][  T167]  ? tun_get (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) drivers/net/tun.c:803 (discriminator 2))
[    9.620537][  T167]  __tun_chr_ioctl (drivers/net/tun.c:3157)
[    9.620727][  T167]  ? build_open_flags (fs/open.c:1212)
[    9.620927][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    9.621118][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[    9.621312][  T167]  ? __x64_sys_openat (fs/open.c:1370 fs/open.c:1386 fs/open.c:1381 fs/open.c:1381)
[    9.621511][  T167]  ? fput_close_sync (fs/file_table.c:615)
[    9.621701][  T167]  ? __ia32_sys_open (fs/open.c:1374)
[    9.621895][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.622090][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.622278][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.622474][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.622661][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.622899][  T167] RIP: 0033:0x47cc8d
[    9.623052][  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 
[    9.623729][  T167] RSP: 002b:00007ffc5796dad0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.624019][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.624306][  T167] RDX: 00007ffc5796db50 RSI: 00000000400454ca RDI: 0000000000000005
[    9.624603][  T167] RBP: 00007ffc5796db20 R08: 0000000000000000 R09: 0000000000000000
[    9.624897][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5796e028
[    9.625194][  T167] R13: 00007ffc5796e0b0 R14: 0000000000000002 R15: 0000000000543540
| [    9.627834][  T167] ------------[ cut here ]------------
| [    9.628028][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [    9.628411][  T167] Modules linked in:
| [    9.629069][  T167] Tainted: [W]=WARN
[    9.629214][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.629463][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.629714][  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
[    9.630407][  T167] RSP: 0018:ffa0000000807c58 EFLAGS: 00010286
[    9.630648][  T167] RAX: 00000000ffffffa6 RBX: ff110000056dedc0 RCX: 1ff4000000100f51
[    9.630938][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000056dee70
[    9.631227][  T167] RBP: ff11000005340000 R08: 1fe2200000adbdcf R09: ff1100000c2bae58
[    9.631520][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000000
[    9.631808][  T167] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000003
[    9.632100][  T167] FS:  00000000053ab400(0000) GS:ff110000a3f53000(0000) knlGS:0000000000000000
[    9.632441][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.632679][  T167] CR2: 00007f239406f000 CR3: 000000000dabe004 CR4: 0000000000771ef0
[    9.632968][  T167] PKRU: 55555554
[    9.633111][  T167] Call Trace:
[    9.633254][  T167]  <TASK>
[    9.633361][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.633551][  T167]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    9.633745][  T167]  notifier_call_chain (kernel/notifier.c:85)
[    9.633945][  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)
[    9.634137][  T167]  ? netdev_sync_lower_features (net/core/dev.c:10883)
[    9.634387][  T167]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    9.634582][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    9.634776][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    9.634979][  T167]  ? update_socket_protocol+0x10/0x10
[    9.635192][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    9.635396][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.635607][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.635800][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.635996][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.636188][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.636430][  T167] RIP: 0033:0x47cc8d
[    9.636580][  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 
[    9.637280][  T167] RSP: 002b:00007ffc5796db10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.637576][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.637866][  T167] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    9.638159][  T167] RBP: 00007ffc5796db60 R08: 0000000000000005 R09: 0000000000000120
[    9.638451][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5796e028
[    9.638736][  T167] R13: 00007ffc5796e0b0 R14: 0000000000000002 R15: 0000000000543540
| [    9.641476][  T167] ------------[ cut here ]------------
| [    9.641676][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [    9.642091][  T167] Modules linked in:
| [    9.642720][  T167] Tainted: [W]=WARN
[    9.642879][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.643139][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.643424][  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
[    9.644154][  T167] RSP: 0018:ffa0000000807850 EFLAGS: 00010286
[    9.644418][  T167] RAX: 00000000ffffffa6 RBX: ff110000056df3c0 RCX: 1ff4000000100ed0
[    9.644731][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000056df470
[    9.645045][  T167] RBP: ff11000005340000 R08: 1fe2200000adbe8f R09: ff1100000c2bae58
[    9.645361][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000001
[    9.645666][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005860900
[    9.645977][  T167] FS:  00000000053ab400(0000) GS:ff110000a3f53000(0000) knlGS:0000000000000000
[    9.646350][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.646611][  T167] CR2: 00007f239406f000 CR3: 000000000dabe004 CR4: 0000000000771ef0
[    9.646922][  T167] PKRU: 55555554
[    9.647078][  T167] Call Trace:
[    9.647231][  T167]  <TASK>
[    9.647348][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.647567][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.647724][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    9.647936][  T167]  __dev_notify_flags (net/core/dev.c:9787)
[    9.648144][  T167]  ? netif_change_name (net/core/dev.c:1495)
[    9.648356][  T167]  ? __dev_change_flags (net/core/dev.c:9752)
[    9.648562][  T167]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    9.648776][  T167]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.648986][  T167]  netif_change_flags (net/core/dev.c:9820)
[    9.649197][  T167]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    9.649419][  T167]  dev_change_flags (net/core/dev_api.c:68)
[    9.649637][  T167]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    9.649855][  T167]  ? inet_ifa_byprefix (net/ipv4/devinet.c:619 (discriminator 9))
[    9.650063][  T167]  ? _copy_from_user (./include/linux/instrumented.h:146 ./include/linux/uaccess.h:184 lib/usercopy.c:18)
[    9.650281][  T167]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    9.650447][  T167]  ? inet_dgram_connect (net/ipv4/af_inet.c:589)
[    9.650648][  T167]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.650866][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.651075][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.651281][  T167]  sock_do_ioctl (net/socket.c:1313)
[    9.651494][  T167]  ? __sock_recv_cmsgs (./include/net/sock.h:2867)
[    9.651712][  T167]  ? ioctl_file_clone (fs/ioctl.c:244)
[    9.651930][  T167]  sock_ioctl (net/socket.c:1434)
[    9.652087][  T167]  ? br_ioctl_call (net/socket.c:1279)
[    9.652288][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    9.652500][  T167]  ? update_socket_protocol+0x10/0x10
[    9.652702][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    9.652919][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.653117][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.653313][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.653521][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.653718][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.653969][  T167] RIP: 0033:0x47cc8d
[    9.654128][  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 
[    9.654849][  T167] RSP: 002b:00007ffc5796daf0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.655147][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.655450][  T167] RDX: 00007ffc5796db60 RSI: 0000000000008914 RDI: 0000000000000006
[    9.655755][  T167] RBP: 00007ffc5796db40 R08: 0000000000000005 R09: 0000000000000120
[    9.656057][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5796e028
[    9.656365][  T167] R13: 00007ffc5796e0b0 R14: 0000000000000002 R15: 0000000000543540
| [   99.382252][  T167] ------------[ cut here ]------------
| [   99.382451][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [   99.382734][  T167] Modules linked in:
| [   99.383170][  T167] Tainted: [W]=WARN
[   99.383276][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   99.383457][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   99.383635][  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
[   99.384131][  T167] RSP: 0018:ffa00000008076f0 EFLAGS: 00010286
[   99.384305][  T167] RAX: 00000000ffffffa6 RBX: ff1100000bcbb540 RCX: 1ff4000000100ea4
[   99.384518][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000bcbb5f0
[   99.384726][  T167] RBP: ff11000005340000 R08: 1fe22000017976bf R09: ff1100000c2bae58
[   99.384930][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 0000000000000041
[   99.385145][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ffa0000000807790
[   99.385359][  T167] FS:  0000000000000000(0000) GS:ff110000a3f53000(0000) knlGS:0000000000000000
[   99.385605][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   99.385783][  T167] CR2: 00007f239406f000 CR3: 000000001cd39002 CR4: 0000000000771ef0
[   99.385991][  T167] PKRU: 55555554
[   99.386099][  T167] Call Trace:
[   99.386203][  T167]  <TASK>
[   99.386277][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   99.387197][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   99.387307][  T167]  netif_close_many (net/core/dev.c:1804)
[   99.387644][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.387786][  T167]  ? __dev_close_many (net/core/dev.c:1781)
[   99.387923][  T167]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   99.388112][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   99.388291][  T167]  ? select_fallback_rq (kernel/sched/sched.h:1383)
[   99.388544][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   99.388715][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.388850][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.388988][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.389134][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   99.389274][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   99.389503][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   99.389645][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.389787][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   99.389926][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   99.390072][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   99.390209][  T167]  __fput (fs/file_table.c:510)
[   99.390318][  T167]  task_work_run (kernel/task_work.c:233)
[   99.390601][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.390749][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   99.390903][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   99.391058][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   99.391184][  T167]  ? exit_notify (kernel/exit.c:748)
[   99.391410][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.391566][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.391723][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   99.391879][  T167]  do_group_exit (kernel/exit.c:1119)
[   99.392041][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   99.392244][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.392422][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   99.392567][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   99.392705][  T167]  get_signal (kernel/signal.c:3037)
[   99.392844][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   99.392982][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   99.393123][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[   99.393261][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   99.393407][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   99.393550][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   99.393689][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.393826][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   99.394002][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   99.394148][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.394287][  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)
[   99.394433][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   99.394570][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   99.394741][  T167] RIP: 0033:0x4c2d9e
[   99.394853][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   99.395046][  T167] RSP: 002b:00007ffc5796d480 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   99.395263][  T167] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   99.395476][  T167] RDX: 0000000000000014 RSI: 00007ffc5796d560 RDI: 0000000000000007
[   99.395681][  T167] RBP: 00007ffc5796d490 R08: 00007ffc5796d520 R09: 000000000000000c
[   99.395889][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc5796e028
[   99.396102][  T167] R13: 00007ffc5796e0b0 R14: 00007ffc5796d650 R15: 0000000000543540
| [   99.400480][  T167] ------------[ cut here ]------------
| [   99.400638][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: packetdrill/167
| [   99.400907][  T167] Modules linked in:
| [   99.401326][  T167] Tainted: [W]=WARN
[   99.401432][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   99.401602][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   99.401777][  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
[   99.402263][  T167] RSP: 0018:ffa0000000807820 EFLAGS: 00010286
[   99.402491][  T167] RAX: 00000000ffffffa6 RBX: ff1100000bcbb0c0 RCX: 1ff4000000100eca
[   99.402693][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000bcbb170
[   99.402893][  T167] RBP: ff11000005340000 R08: 1fe220000179762f R09: ff1100000c2bae58
[   99.403096][  T167] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[   99.403294][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   99.403558][  T167] FS:  0000000000000000(0000) GS:ff110000a3f53000(0000) knlGS:0000000000000000
[   99.403793][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   99.403961][  T167] CR2: 00007f239406f000 CR3: 000000001cd39002 CR4: 0000000000771ef0
[   99.404171][  T167] PKRU: 55555554
[   99.404273][  T167] Call Trace:
[   99.404431][  T167]  <TASK>
[   99.404554][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   99.404726][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   99.404892][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.405034][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.405173][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.405307][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   99.405498][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   99.405634][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   99.405768][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.405905][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   99.406039][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   99.406181][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   99.406313][  T167]  __fput (fs/file_table.c:510)
[   99.406473][  T167]  task_work_run (kernel/task_work.c:233)
[   99.406605][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.406741][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   99.406874][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   99.407008][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   99.407119][  T167]  ? exit_notify (kernel/exit.c:748)
[   99.407252][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.407443][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.407574][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   99.407706][  T167]  do_group_exit (kernel/exit.c:1119)
[   99.407838][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   99.408002][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.408144][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   99.408277][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   99.408464][  T167]  get_signal (kernel/signal.c:3037)
[   99.408600][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   99.408733][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   99.408868][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[   99.409002][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   99.409151][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   99.409288][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   99.409480][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.409615][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   99.409779][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   99.409913][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.410048][  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)
[   99.410191][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   99.410378][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   99.410546][  T167] RIP: 0033:0x4c2d9e
[   99.410652][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   99.410822][  T167] RSP: 002b:00007ffc5796d480 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   99.411029][  T167] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   99.411231][  T167] RDX: 0000000000000014 RSI: 00007ffc5796d560 RDI: 0000000000000007
[   99.411485][  T167] RBP: 00007ffc5796d490 R08: 00007ffc5796d520 R09: 000000000000000c
[   99.411682][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc5796e028
[   99.411880][  T167] R13: 00007ffc5796e0b0 R14: 00007ffc5796d650 R15: 0000000000543540
| [   99.449023][   T12] ------------[ cut here ]------------
| [   99.449249][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: 0/12
| [   99.449727][   T12] Modules linked in:
| [   99.450190][   T12] Tainted: [W]=WARN
[   99.450286][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   99.450534][   T12] Workqueue: netns cleanup_net
[   99.450680][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   99.450848][   T12] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   99.451313][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   99.451482][   T12] RAX: 00000000ffffffa6 RBX: ff1100000a73d0c0 RCX: 1ff4000000018ed5
[   99.451669][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000a73d170
[   99.451859][   T12] RBP: ff11000008869000 R08: 1fe22000014e7a2f R09: ff11000001afd1d0
[   99.452057][   T12] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[   99.452242][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   99.452438][   T12] FS:  0000000000000000(0000) GS:ff110000a3dd3000(0000) knlGS:0000000000000000
[   99.452667][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   99.452901][   T12] CR2: 00007f1318f5cf98 CR3: 000000001cd39004 CR4: 0000000000771ef0
[   99.453190][   T12] PKRU: 55555554
[   99.453336][   T12] Call Trace:
[   99.453452][   T12]  <TASK>
[   99.453549][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   99.453746][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   99.453907][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   99.454037][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   99.454216][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   99.454410][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   99.454598][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   99.454762][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   99.454888][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   99.455018][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   99.455155][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   99.455279][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.455417][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   99.455545][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   99.455669][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   99.455797][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   99.455922][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.456056][   T12]  process_one_work (kernel/workqueue.c:3314)
[   99.456187][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   99.456312][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   99.456453][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   99.456581][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   99.456708][   T12]  kthread (kernel/kthread.c:436)
[   99.456822][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   99.457017][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   99.457150][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   99.457280][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   99.457444][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   99.457569][   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