======================================
| xx__-> [    9.747190][  T167] ------------[ cut here ]------------
| [    9.747451][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: unshare/167
| [    9.747775][  T167] Modules linked in:
| [    9.748387][  T167] Tainted: [W]=WARN
[    9.748538][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.748795][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.749155][  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
[    9.749774][  T167] RSP: 0018:ffa0000000847ab0 EFLAGS: 00010286
[    9.750132][  T167] RAX: 00000000ffffffa6 RBX: ff1100000b09d3c0 RCX: 1ff4000000108f1c
[    9.750455][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000b09d470
[    9.750730][  T167] RBP: ff11000008589000 R08: 1fe2200001613a8f R09: ff11000004dcae80
[    9.751049][  T167] R10: 0000000000000002 R11: 0000000000000001 R12: 00000000ffffffff
[    9.751317][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000008589000
[    9.751573][  T167] FS:  00007f1de6b18740(0000) GS:ff110000aced3000(0000) knlGS:0000000000000000
[    9.751901][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.752139][  T167] CR2: 000055b969ce6310 CR3: 0000000009f2a003 CR4: 0000000000771ef0
[    9.752393][  T167] PKRU: 55555554
[    9.752545][  T167] Call Trace:
[    9.752697][  T167]  <TASK>
[    9.752823][  T167]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    9.753030][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.753250][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.753440][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.753595][  T167]  register_netdevice (net/core/dev.c:11488)
[    9.753783][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.754035][  T167]  register_netdev (net/core/dev.c:11552)
[    9.754243][  T167]  loopback_net_init (drivers/net/loopback.c:218)
[    9.754437][  T167]  ops_init (net/core/net_namespace.c:137)
[    9.754592][  T167]  setup_net (net/core/net_namespace.c:446)
[    9.754749][  T167]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    9.754962][  T167]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    9.755164][  T167]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    9.755353][  T167]  copy_net_ns (net/core/net_namespace.c:579)
[    9.755562][  T167]  create_new_namespaces (kernel/nsproxy.c:132)
[    9.755750][  T167]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    9.755955][  T167]  ksys_unshare (kernel/fork.c:3243)
[    9.756154][  T167]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    9.756341][  T167]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    9.756525][  T167]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    9.756726][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.756934][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.757133][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.757323][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.757550][  T167] RIP: 0033:0x7f1de6c13bcb
[    9.757741][  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
[    9.758315][  T167] RSP: 002b:00007ffcc2653718 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    9.758588][  T167] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1de6c13bcb
[    9.758845][  T167] RDX: 0000000000000000 RSI: 00007ffcc2653480 RDI: 0000000040000000
[    9.759113][  T167] RBP: 00007ffcc2653aa0 R08: 00007ffcc2653670 R09: 0000000000000000
[    9.759362][  T167] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    9.759610][  T167] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055b969ce9b68
| [    9.778754][  T167] ------------[ cut here ]------------
| [    9.778956][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/167
| [    9.779271][  T167] Modules linked in:
| [    9.779764][  T167] Tainted: [W]=WARN
[    9.779929][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.780166][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.780380][  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
[    9.780877][  T167] RSP: 0018:ffa0000000847b58 EFLAGS: 00010286
[    9.781098][  T167] RAX: 00000000ffffffa6 RBX: ff1100000bf18640 RCX: 1ff4000000108f31
[    9.781330][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000bf186f0
[    9.781562][  T167] RBP: ff1100000bd20000 R08: 1fe22000017e30df R09: ff11000004dcae58
[    9.781796][  T167] R10: 0000000000000002 R11: 0000000000000001 R12: 00000000ffffffff
[    9.782060][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff1100000bd20000
[    9.782296][  T167] FS:  000000002195e400(0000) GS:ff110000aced3000(0000) knlGS:0000000000000000
[    9.782561][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.782783][  T167] CR2: 00007f1f1d51d000 CR3: 00000000094f1004 CR4: 0000000000771ef0
[    9.783063][  T167] PKRU: 55555554
[    9.783209][  T167] Call Trace:
[    9.783354][  T167]  <TASK>
[    9.783473][  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))
[    9.783647][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.783831][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    9.784026][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.784177][  T167]  register_netdevice (net/core/dev.c:11488)
[    9.784354][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    9.784558][  T167]  ? alloc_netdev_mqs (net/core/dev.c:12133)
[    9.784735][  T167]  tun_set_iff.constprop.0 (drivers/net/tun.c:2876)
[    9.784931][  T167]  ? tun_attach.isra.0 (./include/linux/ptr_ring.h:601)
[    9.785129][  T167]  ? tun_get (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) drivers/net/tun.c:803 (discriminator 2))
[    9.785280][  T167]  __tun_chr_ioctl (drivers/net/tun.c:3157)
[    9.785465][  T167]  ? build_open_flags (fs/open.c:1212)
[    9.785646][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    9.785832][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[    9.786034][  T167]  ? __x64_sys_openat (fs/open.c:1370 fs/open.c:1386 fs/open.c:1381 fs/open.c:1381)
[    9.786213][  T167]  ? fput_close_sync (fs/file_table.c:615)
[    9.786394][  T167]  ? __ia32_sys_open (fs/open.c:1374)
[    9.786574][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.786760][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.786957][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.787146][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.787326][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.787535][  T167] RIP: 0033:0x47cc8d
[    9.787687][  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 
[    9.788222][  T167] RSP: 002b:00007ffe508a7d50 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.788474][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.788707][  T167] RDX: 00007ffe508a7dd0 RSI: 00000000400454ca RDI: 0000000000000005
[    9.788958][  T167] RBP: 00007ffe508a7da0 R08: 0000000000000000 R09: 0000000000000000
[    9.789205][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe508a82a8
[    9.789441][  T167] R13: 00007ffe508a8330 R14: 0000000000000002 R15: 0000000000543540
| [    9.791589][  T167] ------------[ cut here ]------------
| [    9.791772][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/167
| [    9.792121][  T167] Modules linked in:
| [    9.792596][  T167] Tainted: [W]=WARN
[    9.792742][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.792959][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.793182][  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
[    9.793663][  T167] RSP: 0018:ffa0000000847c58 EFLAGS: 00010286
[    9.793882][  T167] RAX: 00000000ffffffa6 RBX: ff1100000bf18340 RCX: 1ff4000000108f51
[    9.794131][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000bf183f0
[    9.794364][  T167] RBP: ff1100000bd20000 R08: 1fe22000017e307f R09: ff11000004dcae58
[    9.794597][  T167] R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000000
[    9.794841][  T167] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000002
[    9.795135][  T167] FS:  000000002195e400(0000) GS:ff110000aced3000(0000) knlGS:0000000000000000
[    9.795408][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.795618][  T167] CR2: 00007f1f1d51d000 CR3: 00000000094f1004 CR4: 0000000000771ef0
[    9.795872][  T167] PKRU: 55555554
[    9.796035][  T167] Call Trace:
[    9.796182][  T167]  <TASK>
[    9.796300][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    9.796480][  T167]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    9.796663][  T167]  notifier_call_chain (kernel/notifier.c:85)
[    9.796856][  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)
[    9.797057][  T167]  ? netdev_sync_lower_features (net/core/dev.c:10883)
[    9.797268][  T167]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    9.797454][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    9.797633][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    9.797824][  T167]  ? update_socket_protocol+0x10/0x10
[    9.798023][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    9.798205][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.798386][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.798564][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.798746][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.798943][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.799168][  T167] RIP: 0033:0x47cc8d
[    9.799320][  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 
[    9.799826][  T167] RSP: 002b:00007ffe508a7d90 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.800094][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.800334][  T167] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    9.800573][  T167] RBP: 00007ffe508a7de0 R08: 0000000000000000 R09: 0000000000000000
[    9.800820][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe508a82a8
[    9.801079][  T167] R13: 00007ffe508a8330 R14: 0000000000000002 R15: 0000000000543540
| [    9.803299][  T167] ------------[ cut here ]------------
| [    9.803475][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/167
| [    9.803786][  T167] Modules linked in:
| [    9.804319][  T167] Tainted: [W]=WARN
[    9.804470][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.804718][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    9.804968][  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
[    9.805507][  T167] RSP: 0018:ffa0000000847850 EFLAGS: 00010286
[    9.805730][  T167] RAX: 00000000ffffffa6 RBX: ff1100000bf19240 RCX: 1ff4000000108ed0
[    9.806015][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000bf192f0
[    9.806277][  T167] RBP: ff1100000bd20000 R08: 1fe22000017e325f R09: ff11000004dcae58
[    9.806542][  T167] R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000001
[    9.806793][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000005868900
[    9.807081][  T167] FS:  000000002195e400(0000) GS:ff110000aced3000(0000) knlGS:0000000000000000
[    9.807363][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.807578][  T167] CR2: 00007f1f1d51d000 CR3: 00000000094f1004 CR4: 0000000000771ef0
[    9.807831][  T167] PKRU: 55555554
[    9.807988][  T167] Call Trace:
[    9.808153][  T167]  <TASK>
[    9.808275][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    9.808461][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    9.808613][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    9.808797][  T167]  __dev_notify_flags (net/core/dev.c:9787)
[    9.809012][  T167]  ? netif_change_name (net/core/dev.c:1495)
[    9.809195][  T167]  ? __dev_change_flags (net/core/dev.c:9752)
[    9.809379][  T167]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    9.809566][  T167]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    9.809751][  T167]  netif_change_flags (net/core/dev.c:9820)
[    9.809959][  T167]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    9.810155][  T167]  dev_change_flags (net/core/dev_api.c:68)
[    9.810363][  T167]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    9.810554][  T167]  ? inet_ifa_byprefix (net/ipv4/devinet.c:619 (discriminator 9))
[    9.810739][  T167]  ? _copy_from_user (./include/linux/instrumented.h:146 ./include/linux/uaccess.h:184 lib/usercopy.c:18)
[    9.810943][  T167]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    9.811113][  T167]  ? inet_dgram_connect (net/ipv4/af_inet.c:589)
[    9.811297][  T167]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    9.811488][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.811673][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    9.811872][  T167]  sock_do_ioctl (net/socket.c:1313)
[    9.812074][  T167]  ? __sock_recv_cmsgs (./include/net/sock.h:2867)
[    9.812262][  T167]  ? ioctl_file_clone (fs/ioctl.c:244)
[    9.812452][  T167]  sock_ioctl (net/socket.c:1434)
[    9.812605][  T167]  ? br_ioctl_call (net/socket.c:1279)
[    9.812789][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    9.813018][  T167]  ? update_socket_protocol+0x10/0x10
[    9.813202][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    9.813401][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    9.813596][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    9.813781][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    9.813983][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    9.814188][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.814402][  T167] RIP: 0033:0x47cc8d
[    9.814555][  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 
[    9.815096][  T167] RSP: 002b:00007ffe508a7d70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    9.815365][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    9.815627][  T167] RDX: 00007ffe508a7de0 RSI: 0000000000008914 RDI: 0000000000000006
[    9.815887][  T167] RBP: 00007ffe508a7dc0 R08: 0000000000000000 R09: 0000000000000000
[    9.816142][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe508a82a8
[    9.816392][  T167] R13: 00007ffe508a8330 R14: 0000000000000002 R15: 0000000000543540
| [   99.592557][  T167] ------------[ cut here ]------------
| [   99.592824][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/167
| [   99.593282][  T167] Modules linked in:
| [   99.594153][  T167] Tainted: [W]=WARN
[   99.594415][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   99.594711][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   99.595057][  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
[   99.595657][  T167] RSP: 0018:ffa00000008476f0 EFLAGS: 00010286
[   99.595943][  T167] RAX: 00000000ffffffa6 RBX: ff1100000c64f0c0 RCX: 1ff4000000108ea4
[   99.596335][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000c64f170
[   99.596657][  T167] RBP: ff1100000bd20000 R08: 1fe22000018c9e2f R09: ff11000004dcae58
[   99.597013][  T167] R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000041
[   99.597356][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ffa0000000847790
[   99.597669][  T167] FS:  0000000000000000(0000) GS:ff110000aced3000(0000) knlGS:0000000000000000
[   99.598042][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   99.598338][  T167] CR2: 00007f1f1d51d000 CR3: 0000000023339006 CR4: 0000000000771ef0
[   99.598642][  T167] PKRU: 55555554
[   99.598790][  T167] Call Trace:
[   99.598953][  T167]  <TASK>
[   99.599088][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   99.599288][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   99.599444][  T167]  netif_close_many (net/core/dev.c:1804)
[   99.599634][  T167]  ? asym_cpu_capacity_scan (./include/linux/rculist.h:103)
[   99.599822][  T167]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   99.600029][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.600218][  T167]  ? __dev_close_many (net/core/dev.c:1781)
[   99.600425][  T167]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   99.600645][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   99.600868][  T167]  ? select_fallback_rq (kernel/sched/sched.h:1383)
[   99.601074][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   99.601300][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.601487][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.601674][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.601863][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   99.602069][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   99.602264][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   99.602452][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   99.602639][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.602825][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   99.603052][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   99.603254][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   99.603443][  T167]  __fput (fs/file_table.c:510)
[   99.603600][  T167]  task_work_run (kernel/task_work.c:233)
[   99.603787][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.603985][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   99.604188][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   99.604386][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   99.604543][  T167]  ? exit_notify (kernel/exit.c:748)
[   99.604728][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.604927][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.605127][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   99.605320][  T167]  do_group_exit (kernel/exit.c:1119)
[   99.605505][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   99.605723][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.605918][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   99.606115][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   99.606312][  T167]  get_signal (kernel/signal.c:3037)
[   99.606504][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   99.606692][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   99.606883][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   99.607084][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   99.607281][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   99.607470][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.607661][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   99.607885][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   99.608085][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.608286][  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)
[   99.608476][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   99.608664][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   99.608889][  T167] RIP: 0033:0x4c2d9e
[   99.609062][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   99.609312][  T167] RSP: 002b:00007ffe508a7700 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   99.609568][  T167] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   99.609820][  T167] RDX: 0000000000000014 RSI: 00007ffe508a77e0 RDI: 0000000000000007
[   99.610092][  T167] RBP: 00007ffe508a7710 R08: 00007ffe508a77a0 R09: 000000000000000c
[   99.610351][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000021968c50
[   99.610600][  T167] R13: 00007ffe508a8330 R14: 00007ffe508a78d0 R15: 0000000000543540
| [   99.615501][  T167] ------------[ cut here ]------------
| [   99.615698][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#2: packetdrill/167
| [   99.616043][  T167] Modules linked in:
| [   99.616610][  T167] Tainted: [W]=WARN
[   99.616762][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   99.616989][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   99.617248][  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
[   99.617768][  T167] RSP: 0018:ffa0000000847820 EFLAGS: 00010286
[   99.618010][  T167] RAX: 00000000ffffffa6 RBX: ff1100000b343e40 RCX: 1ff4000000108eca
[   99.618264][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000b343ef0
[   99.618513][  T167] RBP: ff1100000bd20000 R08: 1fe22000016687df R09: ff11000004dcae58
[   99.618759][  T167] R10: 0000000000000002 R11: 0000000000000001 R12: 00000000ffffffff
[   99.619029][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   99.619288][  T167] FS:  0000000000000000(0000) GS:ff110000aced3000(0000) knlGS:0000000000000000
[   99.619572][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   99.619793][  T167] CR2: 00007f1f1d51d000 CR3: 0000000023339006 CR4: 0000000000771ef0
[   99.620069][  T167] PKRU: 55555554
[   99.620220][  T167] Call Trace:
[   99.620379][  T167]  <TASK>
[   99.620499][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   99.620719][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   99.620943][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.621146][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.621338][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.621527][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   99.621711][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   99.621919][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   99.622114][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   99.622307][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.622495][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   99.622691][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   99.622907][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   99.623137][  T167]  __fput (fs/file_table.c:510)
[   99.623343][  T167]  task_work_run (kernel/task_work.c:233)
[   99.623543][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.623823][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   99.624029][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   99.624213][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   99.624495][  T167]  ? exit_notify (kernel/exit.c:748)
[   99.624678][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   99.624869][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.625611][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   99.626330][  T167]  do_group_exit (kernel/exit.c:1119)
[   99.627058][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   99.627775][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   99.628444][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   99.628625][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   99.628810][  T167]  get_signal (kernel/signal.c:3037)
[   99.629019][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   99.629201][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   99.629389][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   99.629574][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   99.629759][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   99.629956][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.630151][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   99.630378][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   99.630560][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.630743][  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)
[   99.630939][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   99.631138][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   99.631361][  T167] RIP: 0033:0x4c2d9e
[   99.631517][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   99.631733][  T167] RSP: 002b:00007ffe508a7700 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   99.632007][  T167] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   99.632258][  T167] RDX: 0000000000000014 RSI: 00007ffe508a77e0 RDI: 0000000000000007
[   99.632503][  T167] RBP: 00007ffe508a7710 R08: 00007ffe508a77a0 R09: 000000000000000c
[   99.632747][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000021968c50
[   99.633018][  T167] R13: 00007ffe508a8330 R14: 00007ffe508a78d0 R15: 0000000000543540
| [   99.649008][   T12] ------------[ cut here ]------------
| [   99.649205][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: 0/12
| [   99.649455][   T12] Modules linked in:
| [   99.649909][   T12] Tainted: [W]=WARN
[   99.650041][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   99.650223][   T12] Workqueue: netns cleanup_net
[   99.650367][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   99.650539][   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
[   99.650979][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   99.651147][   T12] RAX: 00000000ffffffa6 RBX: ff1100000b343240 RCX: 1ff4000000018ed5
[   99.651343][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000b3432f0
[   99.651525][   T12] RBP: ff11000008589000 R08: 1fe220000166865f R09: ff11000001afd1d0
[   99.651706][   T12] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[   99.651893][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   99.652090][   T12] FS:  0000000000000000(0000) GS:ff110000acdd3000(0000) knlGS:0000000000000000
[   99.652320][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   99.652474][   T12] CR2: 00007f1e46b1fc40 CR3: 0000000023339001 CR4: 0000000000771ef0
[   99.652656][   T12] PKRU: 55555554
[   99.652749][   T12] Call Trace:
[   99.652843][   T12]  <TASK>
[   99.652912][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   99.653072][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   99.653226][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   99.653355][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   99.653477][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   99.653598][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   99.653726][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   99.653852][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   99.653976][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   99.654107][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   99.654238][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   99.654359][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   99.654483][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   99.654606][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   99.654729][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   99.654858][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   99.654981][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   99.655111][   T12]  process_one_work (kernel/workqueue.c:3314)
[   99.655244][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   99.655366][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   99.655492][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   99.655619][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   99.655743][   T12]  kthread (kernel/kthread.c:436)
[   99.655836][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   99.655999][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   99.656122][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   99.656252][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   99.656403][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   99.656526][   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