======================================
| xx__-> [    8.825327][  T166] ------------[ cut here ]------------
| [    8.825541][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: unshare/166
| [    8.825817][  T166] Modules linked in:
| [    8.826216][  T166] Tainted: [W]=WARN
[    8.826322][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.826541][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.826727][  T166] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.827236][  T166] RSP: 0018:ffa00000007d7ab0 EFLAGS: 00010286
[    8.827417][  T166] RAX: 00000000ffffffa6 RBX: ff1100000bf804c0 RCX: 1ff40000000faf1c
[    8.827615][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000bf80570
[    8.827814][  T166] RBP: ff11000009be9000 R08: 1fe22000017f00af R09: ff1100000d830b80
[    8.828013][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    8.828211][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000009be9000
[    8.828443][  T166] FS:  00007f126e8be740(0000) GS:ff1100007b7d3000(0000) knlGS:0000000000000000
[    8.828678][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.828844][  T166] CR2: 0000557d546c1310 CR3: 000000000caff004 CR4: 0000000000771ef0
[    8.829044][  T166] PKRU: 55555554
[    8.829145][  T166] Call Trace:
[    8.829246][  T166]  <TASK>
[    8.829322][  T166]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    8.829464][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.829597][  T166]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.829730][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.829831][  T166]  register_netdevice (net/core/dev.c:11488)
[    8.829967][  T166]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.830135][  T166]  register_netdev (net/core/dev.c:11552)
[    8.830274][  T166]  loopback_net_init (drivers/net/loopback.c:218)
[    8.830416][  T166]  ops_init (net/core/net_namespace.c:137)
[    8.830517][  T166]  setup_net (net/core/net_namespace.c:446)
[    8.830617][  T166]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    8.830748][  T166]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    8.830880][  T166]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    8.831016][  T166]  copy_net_ns (net/core/net_namespace.c:579)
[    8.831151][  T166]  create_new_namespaces (kernel/nsproxy.c:132)
[    8.831293][  T166]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    8.831432][  T166]  ksys_unshare (kernel/fork.c:3243)
[    8.831565][  T166]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    8.831701][  T166]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    8.831834][  T166]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    8.831968][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.832100][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.832232][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.832376][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.832545][  T166] RIP: 0033:0x7f126e9b9bcb
[    8.832684][  T166] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 2d 82 0f 00 	mov    0xf822d(%rip),%rcx        # 0xf8237
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf8237
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf820d
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    8.833152][  T166] RSP: 002b:00007ffef21e8ad8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    8.833365][  T166] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f126e9b9bcb
[    8.833563][  T166] RDX: 0000000000000000 RSI: 00007ffef21e8840 RDI: 0000000040000000
[    8.833760][  T166] RBP: 00007ffef21e8e60 R08: 00007ffef21e8a30 R09: 0000000000000000
[    8.833960][  T166] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    8.834159][  T166] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000557d546c4b68
| [    8.866634][  T166] ------------[ cut here ]------------
| [    8.866788][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [    8.867029][  T166] Modules linked in:
| [    8.867477][  T166] Tainted: [W]=WARN
[    8.867573][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.867728][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.867888][  T166] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.868335][  T166] RSP: 0018:ffa00000007d7b58 EFLAGS: 00010286
[    8.868494][  T166] RAX: 00000000ffffffa6 RBX: ff110000091096c0 RCX: 1ff40000000faf31
[    8.868678][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000009109770
[    8.868857][  T166] RBP: ff1100000adbc000 R08: 1fe22000012212ef R09: ff1100000d830b58
[    8.869037][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    8.869219][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff1100000adbc000
[    8.869413][  T166] FS:  0000000000a10400(0000) GS:ff1100007b7d3000(0000) knlGS:0000000000000000
[    8.869628][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.869780][  T166] CR2: 00007f92e606e000 CR3: 000000000cafb005 CR4: 0000000000771ef0
[    8.869970][  T166] PKRU: 55555554
[    8.870060][  T166] Call Trace:
[    8.870151][  T166]  <TASK>
[    8.870214][  T166]  ? ip6_route_dev_notify (./include/net/net_namespace.h:419 (discriminator 1) ./include/linux/netdevice.h:2776 (discriminator 1) net/ipv6/route.c:6476 (discriminator 1))
[    8.870349][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.870470][  T166]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.870594][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.870685][  T166]  register_netdevice (net/core/dev.c:11488)
[    8.870806][  T166]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.870956][  T166]  ? alloc_netdev_mqs (net/core/dev.c:12133)
[    8.871077][  T166]  tun_set_iff.constprop.0 (drivers/net/tun.c:2876)
[    8.871201][  T166]  ? tun_attach.isra.0 (./include/linux/ptr_ring.h:601)
[    8.871385][  T166]  ? tun_get (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) drivers/net/tun.c:803 (discriminator 2))
[    8.871478][  T166]  __tun_chr_ioctl (drivers/net/tun.c:3157)
[    8.871597][  T166]  ? build_open_flags (fs/open.c:1212)
[    8.871718][  T166]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    8.871837][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[    8.871960][  T166]  ? __x64_sys_openat (fs/open.c:1370 fs/open.c:1386 fs/open.c:1381 fs/open.c:1381)
[    8.872109][  T166]  ? fput_close_sync (fs/file_table.c:615)
[    8.872283][  T166]  ? __ia32_sys_open (fs/open.c:1374)
[    8.872413][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.872536][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.872656][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.872777][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.872899][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.873048][  T166] RIP: 0033:0x47cc8d
[    8.873145][  T166] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    8.873582][  T166] RSP: 002b:00007ffdca99fdc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.873765][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.873947][  T166] RDX: 00007ffdca99fe40 RSI: 00000000400454ca RDI: 0000000000000005
[    8.874127][  T166] RBP: 00007ffdca99fe10 R08: 0000000000000000 R09: 0000000000000000
[    8.874314][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdca9a0318
[    8.874498][  T166] R13: 00007ffdca9a03a0 R14: 0000000000000002 R15: 0000000000543540
| [    8.876129][  T166] ------------[ cut here ]------------
| [    8.876249][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [    8.876530][  T166] Modules linked in:
| [    8.876903][  T166] Tainted: [W]=WARN
[    8.876997][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.877146][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.877310][  T166] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.877737][  T166] RSP: 0018:ffa00000007d7c58 EFLAGS: 00010286
[    8.877887][  T166] RAX: 00000000ffffffa6 RBX: ff11000009108940 RCX: 1ff40000000faf51
[    8.878064][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000091089f0
[    8.878242][  T166] RBP: ff1100000adbc000 R08: 1fe220000122113f R09: ff1100000d830b58
[    8.878434][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
[    8.878622][  T166] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000000
[    8.878803][  T166] FS:  0000000000a10400(0000) GS:ff1100007b7d3000(0000) knlGS:0000000000000000
[    8.879010][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.879161][  T166] CR2: 00007f92e606e000 CR3: 000000000cafb005 CR4: 0000000000771ef0
[    8.879431][  T166] PKRU: 55555554
[    8.879520][  T166] Call Trace:
[    8.879611][  T166]  <TASK>
[    8.879672][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.879867][  T166]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    8.879990][  T166]  notifier_call_chain (kernel/notifier.c:85)
[    8.880111][  T166]  netdev_update_features (net/core/dev.c:2287 net/core/dev.c:2301 net/core/dev.c:1590 net/core/dev.c:11099 net/core/dev.c:11096)
[    8.880228][  T166]  ? netdev_sync_lower_features (net/core/dev.c:10883)
[    8.880463][  T166]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    8.880584][  T166]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    8.880702][  T166]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    8.880825][  T166]  ? update_socket_protocol+0x10/0x10
[    8.881020][  T166]  ? alloc_file_clone (fs/file_table.c:477)
[    8.881175][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.881367][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.881548][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.881851][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.882003][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.882152][  T166] RIP: 0033:0x47cc8d
[    8.882247][  T166] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    8.882767][  T166] RSP: 002b:00007ffdca99fe00 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.883025][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.883204][  T166] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    8.883399][  T166] RBP: 00007ffdca99fe50 R08: 0000000000000000 R09: 0000000000000000
[    8.883652][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdca9a0318
[    8.883829][  T166] R13: 00007ffdca9a03a0 R14: 0000000000000002 R15: 0000000000543540
| [    8.885756][  T166] ------------[ cut here ]------------
| [    8.885968][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [    8.886215][  T166] Modules linked in:
| [    8.886703][  T166] Tainted: [W]=WARN
[    8.886799][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.886958][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.887213][  T166] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    8.887765][  T166] RSP: 0018:ffa00000007d7850 EFLAGS: 00010286
[    8.887928][  T166] RAX: 00000000ffffffa6 RBX: ff11000009108f40 RCX: 1ff40000000faed0
[    8.888117][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000009108ff0
[    8.888402][  T166] RBP: ff1100000adbc000 R08: 1fe22000012211ff R09: ff1100000d830b58
[    8.888595][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
[    8.888783][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005828900
[    8.889060][  T166] FS:  0000000000a10400(0000) GS:ff1100007b7d3000(0000) knlGS:0000000000000000
[    8.889316][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.889563][  T166] CR2: 00007f92e606e000 CR3: 000000000cafb005 CR4: 0000000000771ef0
[    8.889845][  T166] PKRU: 55555554
[    8.889941][  T166] Call Trace:
[    8.890037][  T166]  <TASK>
[    8.890102][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.890317][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.890421][  T166]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    8.890548][  T166]  __dev_notify_flags (net/core/dev.c:9787)
[    8.890675][  T166]  ? netif_change_name (net/core/dev.c:1495)
[    8.890804][  T166]  ? __dev_change_flags (net/core/dev.c:9752)
[    8.891015][  T166]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    8.891141][  T166]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.891274][  T166]  netif_change_flags (net/core/dev.c:9820)
[    8.891487][  T166]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    8.891618][  T166]  dev_change_flags (net/core/dev_api.c:68)
[    8.891745][  T166]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    8.891877][  T166]  ? inet_ifa_byprefix (net/ipv4/devinet.c:619 (discriminator 9))
[    8.892003][  T166]  ? _copy_from_user (./include/linux/instrumented.h:146 ./include/linux/uaccess.h:184 lib/usercopy.c:18)
[    8.892214][  T166]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    8.892317][  T166]  ? inet_dgram_connect (net/ipv4/af_inet.c:589)
[    8.892449][  T166]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    8.892581][  T166]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.892791][  T166]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.892916][  T166]  sock_do_ioctl (net/socket.c:1313)
[    8.893045][  T166]  ? __sock_recv_cmsgs (./include/net/sock.h:2867)
[    8.893174][  T166]  ? ioctl_file_clone (fs/ioctl.c:244)
[    8.893403][  T166]  sock_ioctl (net/socket.c:1434)
[    8.893500][  T166]  ? br_ioctl_call (net/socket.c:1279)
[    8.893628][  T166]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    8.893759][  T166]  ? update_socket_protocol+0x10/0x10
[    8.893969][  T166]  ? alloc_file_clone (fs/file_table.c:477)
[    8.894099][  T166]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.894227][  T166]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.894365][  T166]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.894574][  T166]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.894703][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.894861][  T166] RIP: 0033:0x47cc8d
[    8.894963][  T166] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    8.895611][  T166] RSP: 002b:00007ffdca99fde0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.895926][  T166] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.896115][  T166] RDX: 00007ffdca99fe50 RSI: 0000000000008914 RDI: 0000000000000006
[    8.896320][  T166] RBP: 00007ffdca99fe30 R08: 0000000000000000 R09: 0000000000000000
[    8.896629][  T166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdca9a0318
[    8.896842][  T166] R13: 00007ffdca9a03a0 R14: 0000000000000002 R15: 0000000000543540
| [   98.648047][  T166] ------------[ cut here ]------------
| [   98.648242][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [   98.648536][  T166] Modules linked in:
| [   98.648965][  T166] Tainted: [W]=WARN
[   98.649070][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.649242][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.649429][  T166] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   98.649923][  T166] RSP: 0018:ffa00000007d76f0 EFLAGS: 00010286
[   98.650101][  T166] RAX: 00000000ffffffa6 RBX: ff11000008dbdcc0 RCX: 1ff40000000faea4
[   98.650308][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000008dbdd70
[   98.650519][  T166] RBP: ff1100000adbc000 R08: 1fe22000011b7baf R09: ff1100000d830b58
[   98.650737][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000041
[   98.650943][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: ffa00000007d7790
[   98.651154][  T166] FS:  0000000000000000(0000) GS:ff1100007b7d3000(0000) knlGS:0000000000000000
[   98.652156][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.653116][  T166] CR2: 000055d7e04dbc90 CR3: 0000000016139003 CR4: 0000000000771ef0
[   98.653972][  T166] PKRU: 55555554
[   98.654078][  T166] Call Trace:
[   98.654180][  T166]  <TASK>
[   98.654252][  T166]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   98.654709][  T166]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   98.654818][  T166]  netif_close_many (net/core/dev.c:1804)
[   98.654958][  T166]  ? asym_cpu_capacity_scan (./include/linux/rculist.h:103)
[   98.655096][  T166]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   98.655233][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.655377][  T166]  ? __dev_close_many (net/core/dev.c:1781)
[   98.655515][  T166]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   98.655692][  T166]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   98.655863][  T166]  ? select_fallback_rq (kernel/sched/sched.h:1383)
[   98.656001][  T166]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.656172][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.656310][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.656455][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.656598][  T166]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.656739][  T166]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.656875][  T166]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   98.657013][  T166]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.657152][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.657289][  T166]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.657435][  T166]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.657581][  T166]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.657718][  T166]  __fput (fs/file_table.c:510)
[   98.657827][  T166]  task_work_run (kernel/task_work.c:233)
[   98.657964][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.658103][  T166]  ? task_work_cancel (kernel/task_work.c:190)
[   98.658240][  T166]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.658383][  T166]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.658487][  T166]  ? exit_notify (kernel/exit.c:748)
[   98.658626][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.658764][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.658901][  T166]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.659039][  T166]  do_group_exit (kernel/exit.c:1119)
[   98.659175][  T166]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.659347][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.659484][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.659625][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.659760][  T166]  get_signal (kernel/signal.c:3037)
[   98.659900][  T166]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.660038][  T166]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.660174][  T166]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[   98.660311][  T166]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.660459][  T166]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.660605][  T166]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.660743][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.660882][  T166]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.661057][  T166]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.661194][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.661339][  T166]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   98.661476][  T166]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.661620][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.661790][  T166] RIP: 0033:0x4c2d9e
[   98.661903][  T166] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.662115][  T166] RSP: 002b:00007ffdca99f770 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.662323][  T166] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   98.662537][  T166] RDX: 0000000000000014 RSI: 00007ffdca99f850 RDI: 0000000000000007
[   98.662742][  T166] RBP: 00007ffdca99f780 R08: 00007ffdca99f810 R09: 000000000000000c
[   98.662946][  T166] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffdca9a0318
[   98.663150][  T166] R13: 00007ffdca9a03a0 R14: 00007ffdca99f940 R15: 0000000000543540
| [   98.672783][  T166] ------------[ cut here ]------------
| [   98.672948][  T166] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: packetdrill/166
| [   98.673216][  T166] Modules linked in:
| [   98.673636][  T166] Tainted: [W]=WARN
[   98.673736][  T166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.673906][  T166] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.674079][  T166] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   98.674562][  T166] RSP: 0018:ffa00000007d7820 EFLAGS: 00010286
[   98.674730][  T166] RAX: 00000000ffffffa6 RBX: ff11000008dbcdc0 RCX: 1ff40000000faeca
[   98.674927][  T166] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000008dbce70
[   98.675128][  T166] RBP: ff1100000adbc000 R08: 1fe22000011b79cf R09: ff1100000d830b58
[   98.675337][  T166] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[   98.675542][  T166] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.675744][  T166] FS:  0000000000000000(0000) GS:ff1100007b7d3000(0000) knlGS:0000000000000000
[   98.675975][  T166] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.676144][  T166] CR2: 000055d7e04dbc90 CR3: 0000000016139003 CR4: 0000000000771ef0
[   98.676346][  T166] PKRU: 55555554
[   98.676445][  T166] Call Trace:
[   98.676550][  T166]  <TASK>
[   98.676620][  T166]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.676789][  T166]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.676956][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.677089][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.677221][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.677362][  T166]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.677497][  T166]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.677633][  T166]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   98.677764][  T166]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.677897][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.678033][  T166]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.678168][  T166]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.678305][  T166]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.678442][  T166]  __fput (fs/file_table.c:510)
[   98.678553][  T166]  task_work_run (kernel/task_work.c:233)
[   98.678685][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.678819][  T166]  ? task_work_cancel (kernel/task_work.c:190)
[   98.678954][  T166]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.679090][  T166]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.679192][  T166]  ? exit_notify (kernel/exit.c:748)
[   98.679326][  T166]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.679465][  T166]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.679602][  T166]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.679735][  T166]  do_group_exit (kernel/exit.c:1119)
[   98.679867][  T166]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.680035][  T166]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.680169][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.680303][  T166]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.680440][  T166]  get_signal (kernel/signal.c:3037)
[   98.680580][  T166]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.680714][  T166]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.680845][  T166]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[   98.680980][  T166]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.681118][  T166]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.681256][  T166]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.681399][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.681539][  T166]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.681706][  T166]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.681841][  T166]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.681974][  T166]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   98.682107][  T166]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.682242][  T166]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.682412][  T166] RIP: 0033:0x4c2d9e
[   98.682519][  T166] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.682693][  T166] RSP: 002b:00007ffdca99f770 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.682894][  T166] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   98.683091][  T166] RDX: 0000000000000014 RSI: 00007ffdca99f850 RDI: 0000000000000007
[   98.683287][  T166] RBP: 00007ffdca99f780 R08: 00007ffdca99f810 R09: 000000000000000c
[   98.683493][  T166] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffdca9a0318
[   98.683696][  T166] R13: 00007ffdca9a03a0 R14: 00007ffdca99f940 R15: 0000000000543540
| [   98.702837][   T12] ------------[ cut here ]------------
| [   98.703028][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: 0/12
| [   98.703311][   T12] Modules linked in:
| [   98.703757][   T12] Tainted: [W]=WARN
[   98.703850][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.704009][   T12] Workqueue: netns cleanup_net
[   98.704146][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.704308][   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
[   98.704762][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   98.704922][   T12] RAX: 00000000ffffffa6 RBX: ff1100000212d840 RCX: 1ff4000000018ed5
[   98.705111][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000212d8f0
[   98.705297][   T12] RBP: ff11000009be9000 R08: 1fe2200000425b1f R09: ff11000001afd1d0
[   98.705525][   T12] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff
[   98.705720][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.705905][   T12] FS:  0000000000000000(0000) GS:ff1100007b853000(0000) knlGS:0000000000000000
[   98.706123][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.706276][   T12] CR2: 00007f96e9bdd680 CR3: 0000000016139002 CR4: 0000000000771ef0
[   98.706465][   T12] PKRU: 55555554
[   98.706563][   T12] Call Trace:
[   98.706655][   T12]  <TASK>
[   98.706720][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.706876][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.707035][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   98.707161][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   98.707285][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   98.707419][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   98.707547][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   98.707671][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   98.707793][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   98.707918][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   98.708041][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   98.708164][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.708292][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   98.708421][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   98.708546][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   98.708670][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   98.708793][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.708920][   T12]  process_one_work (kernel/workqueue.c:3314)
[   98.709046][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   98.709169][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   98.709296][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   98.709429][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   98.709554][   T12]  kthread (kernel/kthread.c:436)
[   98.709646][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.709800][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   98.709925][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   98.710050][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   98.710202][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   98.710326][   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