======================================
| xx__-> [    8.544589][  T167] ------------[ cut here ]------------
| [    8.544799][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#0: unshare/167
| [    8.545085][  T167] Modules linked in:
| [    8.545534][  T167] Tainted: [W]=WARN
[    8.545635][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.545801][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.545980][  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
[    8.546457][  T167] RSP: 0018:ffa00000007f7ab0 EFLAGS: 00010286
[    8.546626][  T167] RAX: 00000000ffffffa6 RBX: ff1100000b599540 RCX: 1ff40000000fef1c
[    8.546825][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000b5995f0
[    8.547031][  T167] RBP: ff1100000a0d1000 R08: 1fe22000016b32bf R09: ff1100000ce5d180
[    8.547237][  T167] R10: 0000000000000000 R11: 0000000000000001 R12: 00000000ffffffff
[    8.547437][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff1100000a0d1000
[    8.547639][  T167] FS:  00007f0577e34740(0000) GS:ff11000082bd3000(0000) knlGS:0000000000000000
[    8.547876][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.548043][  T167] CR2: 00005639e82fe310 CR3: 000000000b732005 CR4: 0000000000771ef0
[    8.548246][  T167] PKRU: 55555554
[    8.548348][  T167] Call Trace:
[    8.548449][  T167]  <TASK>
[    8.548518][  T167]  ? ip6_route_dev_notify (net/ipv6/route.c:6484)
[    8.548702][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.548834][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.548971][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.549071][  T167]  register_netdevice (net/core/dev.c:11488)
[    8.549206][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.549376][  T167]  register_netdev (net/core/dev.c:11552)
[    8.549519][  T167]  loopback_net_init (drivers/net/loopback.c:218)
[    8.549655][  T167]  ops_init (net/core/net_namespace.c:137)
[    8.549756][  T167]  setup_net (net/core/net_namespace.c:446)
[    8.549856][  T167]  ? unregister_pernet_device (net/core/net_namespace.c:1503)
[    8.549992][  T167]  ? lockdep_init_map_type (kernel/locking/lockdep.c:4973)
[    8.550126][  T167]  ? mutex_init_lockdep (./include/linux/lockdep.h:135 ./include/linux/lockdep.h:142 kernel/locking/mutex.c:185)
[    8.550269][  T167]  copy_net_ns (net/core/net_namespace.c:579)
[    8.550403][  T167]  create_new_namespaces (kernel/nsproxy.c:132)
[    8.550537][  T167]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    8.550668][  T167]  ksys_unshare (kernel/fork.c:3243)
[    8.550800][  T167]  ? walk_process_tree (kernel/fork.c:3036 (discriminator 19))
[    8.550939][  T167]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    8.551071][  T167]  ? do_syscall_64 (./include/linux/entry-common.h:177 arch/x86/entry/syscall_64.c:89)
[    8.551202][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.551338][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.551471][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.551601][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.551763][  T167] RIP: 0033:0x7f0577f2fbcb
[    8.551907][  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
[    8.552433][  T167] RSP: 002b:00007ffc077273e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    8.552633][  T167] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0577f2fbcb
[    8.552828][  T167] RDX: 0000000000000000 RSI: 00007ffc07727150 RDI: 0000000040000000
[    8.553028][  T167] RBP: 00007ffc07727770 R08: 00007ffc07727340 R09: 0000000000000000
[    8.553221][  T167] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    8.553479][  T167] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005639e8301b68
| [    8.584873][  T167] ------------[ cut here ]------------
| [    8.585019][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: packetdrill/167
| [    8.585271][  T167] Modules linked in:
| [    8.585650][  T167] Tainted: [W]=WARN
[    8.585750][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.585908][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.586066][  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
[    8.586529][  T167] RSP: 0018:ffa00000007f7b58 EFLAGS: 00010286
[    8.586681][  T167] RAX: 00000000ffffffa6 RBX: ff1100000959fb40 RCX: 1ff40000000fef31
[    8.586865][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000959fbf0
[    8.587046][  T167] RBP: ff11000004998000 R08: 1fe22000012b3f7f R09: ff1100000ce5d158
[    8.587237][  T167] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff
[    8.587418][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff11000004998000
[    8.587599][  T167] FS:  00000000055dc400(0000) GS:ff11000082c53000(0000) knlGS:0000000000000000
[    8.587809][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.587969][  T167] CR2: 00007f345ec43000 CR3: 000000000ac3a003 CR4: 0000000000771ef0
[    8.588150][  T167] PKRU: 55555554
[    8.588243][  T167] Call Trace:
[    8.588333][  T167]  <TASK>
[    8.588396][  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))
[    8.588516][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.588637][  T167]  ? notifier_call_chain (kernel/notifier.c:85)
[    8.588761][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.588853][  T167]  register_netdevice (net/core/dev.c:11488)
[    8.588983][  T167]  ? unregister_netdevice_queue (./include/linux/list.h:162)
[    8.589130][  T167]  ? alloc_netdev_mqs (net/core/dev.c:12133)
[    8.589258][  T167]  tun_set_iff.constprop.0 (drivers/net/tun.c:2876)
[    8.589381][  T167]  ? tun_attach.isra.0 (./include/linux/ptr_ring.h:601)
[    8.589500][  T167]  ? tun_get (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) drivers/net/tun.c:803 (discriminator 2))
[    8.589596][  T167]  __tun_chr_ioctl (drivers/net/tun.c:3157)
[    8.589715][  T167]  ? build_open_flags (fs/open.c:1212)
[    8.589838][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    8.589961][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[    8.590082][  T167]  ? __x64_sys_openat (fs/open.c:1370 fs/open.c:1386 fs/open.c:1381 fs/open.c:1381)
[    8.590202][  T167]  ? fput_close_sync (fs/file_table.c:615)
[    8.590327][  T167]  ? __ia32_sys_open (fs/open.c:1374)
[    8.590446][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.590571][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.590689][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.590808][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.590932][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.591080][  T167] RIP: 0033:0x47cc8d
[    8.591177][  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 
[    8.591709][  T167] RSP: 002b:00007ffc27bb3220 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.591897][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.592074][  T167] RDX: 00007ffc27bb32a0 RSI: 00000000400454ca RDI: 0000000000000005
[    8.592263][  T167] RBP: 00007ffc27bb3270 R08: 0000000000000000 R09: 0000000000000000
[    8.592441][  T167] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc27bb3778
[    8.592619][  T167] R13: 00007ffc27bb3800 R14: 0000000000000002 R15: 0000000000543540
| [    8.594658][  T167] ------------[ cut here ]------------
| [    8.594777][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: packetdrill/167
| [    8.595013][  T167] Modules linked in:
| [    8.595444][  T167] Tainted: [W]=WARN
[    8.595533][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.595684][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.595837][  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
[    8.596274][  T167] RSP: 0018:ffa00000007f7c58 EFLAGS: 00010286
[    8.596423][  T167] RAX: 00000000ffffffa6 RBX: ff1100000959f3c0 RCX: 1ff40000000fef51
[    8.596597][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000959f470
[    8.596776][  T167] RBP: ff11000004998000 R08: 1fe22000012b3e8f R09: ff1100000ce5d158
[    8.596961][  T167] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
[    8.597134][  T167] R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000001
[    8.597316][  T167] FS:  00000000055dc400(0000) GS:ff11000082c53000(0000) knlGS:0000000000000000
[    8.597523][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.597672][  T167] CR2: 00007f345ec43000 CR3: 000000000ac3a003 CR4: 0000000000771ef0
[    8.597890][  T167] PKRU: 55555554
[    8.597979][  T167] Call Trace:
[    8.598066][  T167]  <TASK>
[    8.598127][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[    8.598251][  T167]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    8.598371][  T167]  notifier_call_chain (kernel/notifier.c:85)
[    8.598491][  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)
[    8.598607][  T167]  ? netdev_sync_lower_features (net/core/dev.c:10883)
[    8.598755][  T167]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    8.598878][  T167]  ? tun_chr_read_iter (drivers/net/tun.c:2271 (discriminator 1))
[    8.598996][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    8.599117][  T167]  ? update_socket_protocol+0x10/0x10
[    8.599240][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    8.599360][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.599478][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.599597][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.599716][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.599835][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.599986][  T167] RIP: 0033:0x47cc8d
[    8.600079][  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 
[    8.600517][  T167] RSP: 002b:00007ffc27bb3260 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.600697][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.600876][  T167] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    8.601059][  T167] RBP: 00007ffc27bb32b0 R08: 0000000000000005 R09: 0000000000001ff0
[    8.601252][  T167] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffc27bb3778
[    8.601431][  T167] R13: 00007ffc27bb3800 R14: 0000000000000002 R15: 0000000000543540
| [    8.603081][  T167] ------------[ cut here ]------------
| [    8.603210][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: packetdrill/167
| [    8.603464][  T167] Modules linked in:
| [    8.603849][  T167] Tainted: [W]=WARN
[    8.603952][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.604111][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    8.604279][  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
[    8.604734][  T167] RSP: 0018:ffa00000007f7850 EFLAGS: 00010286
[    8.604901][  T167] RAX: 00000000ffffffa6 RBX: ff1100000959f6c0 RCX: 1ff40000000feed0
[    8.605090][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1100000959f770
[    8.605284][  T167] RBP: ff11000004998000 R08: 1fe22000012b3eef R09: ff1100000ce5d158
[    8.605474][  T167] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
[    8.605662][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ff110000057e0900
[    8.605852][  T167] FS:  00000000055dc400(0000) GS:ff11000082c53000(0000) knlGS:0000000000000000
[    8.606080][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    8.606243][  T167] CR2: 00007f345ec43000 CR3: 000000000ac3a003 CR4: 0000000000771ef0
[    8.606435][  T167] PKRU: 55555554
[    8.606532][  T167] Call Trace:
[    8.606626][  T167]  <TASK>
[    8.606691][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[    8.606821][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[    8.606927][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[    8.607055][  T167]  __dev_notify_flags (net/core/dev.c:9787)
[    8.607183][  T167]  ? netif_change_name (net/core/dev.c:1495)
[    8.607314][  T167]  ? __dev_change_flags (net/core/dev.c:9752)
[    8.607443][  T167]  ? netif_set_allmulti (./include/net/netdev_lock.h:30 (discriminator 1))
[    8.607570][  T167]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[    8.607699][  T167]  netif_change_flags (net/core/dev.c:9820)
[    8.607825][  T167]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    8.607977][  T167]  dev_change_flags (net/core/dev_api.c:68)
[    8.608105][  T167]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    8.608240][  T167]  ? inet_ifa_byprefix (net/ipv4/devinet.c:619 (discriminator 9))
[    8.608369][  T167]  ? _copy_from_user (./include/linux/instrumented.h:146 ./include/linux/uaccess.h:184 lib/usercopy.c:18)
[    8.608499][  T167]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    8.608595][  T167]  ? inet_dgram_connect (net/ipv4/af_inet.c:589)
[    8.608722][  T167]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[    8.608855][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.608989][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[    8.609118][  T167]  sock_do_ioctl (net/socket.c:1313)
[    8.609252][  T167]  ? __sock_recv_cmsgs (./include/net/sock.h:2867)
[    8.609384][  T167]  ? ioctl_file_clone (fs/ioctl.c:244)
[    8.609514][  T167]  sock_ioctl (net/socket.c:1434)
[    8.609612][  T167]  ? br_ioctl_call (net/socket.c:1279)
[    8.609742][  T167]  ? fd_install (./include/linux/rcupdate.h:963 (discriminator 1) fs/file.c:699 (discriminator 1))
[    8.609876][  T167]  ? update_socket_protocol+0x10/0x10
[    8.610004][  T167]  ? alloc_file_clone (fs/file_table.c:477)
[    8.610135][  T167]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    8.610270][  T167]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    8.610400][  T167]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[    8.610526][  T167]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[    8.610653][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.610810][  T167] RIP: 0033:0x47cc8d
[    8.610916][  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 
[    8.611374][  T167] RSP: 002b:00007ffc27bb3240 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    8.611565][  T167] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 000000000047cc8d
[    8.611753][  T167] RDX: 00007ffc27bb32b0 RSI: 0000000000008914 RDI: 0000000000000006
[    8.611947][  T167] RBP: 00007ffc27bb3290 R08: 0000000000000005 R09: 0000000000001ff0
[    8.612137][  T167] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffc27bb3778
[    8.612330][  T167] R13: 00007ffc27bb3800 R14: 0000000000000002 R15: 0000000000543540
| [   98.401211][  T167] ------------[ cut here ]------------
| [   98.401407][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: packetdrill/167
| [   98.401684][  T167] Modules linked in:
| [   98.402125][  T167] Tainted: [W]=WARN
[   98.402244][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.402415][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.402591][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   98.403068][  T167] RSP: 0018:ffa00000007f76f0 EFLAGS: 00010286
[   98.403245][  T167] RAX: 00000000ffffffa6 RBX: ff110000053ea040 RCX: 1ff40000000feea4
[   98.403446][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff110000053ea0f0
[   98.403645][  T167] RBP: ff11000004998000 R08: 1fe2200000a7d41f R09: ff1100000ce5d158
[   98.403844][  T167] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000041
[   98.404044][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: ffa00000007f7790
[   98.404250][  T167] FS:  0000000000000000(0000) GS:ff11000082c53000(0000) knlGS:0000000000000000
[   98.404484][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.404652][  T167] CR2: 0000555711b7a1b0 CR3: 0000000017739001 CR4: 0000000000771ef0
[   98.404854][  T167] PKRU: 55555554
[   98.404954][  T167] Call Trace:
[   98.405054][  T167]  <TASK>
[   98.405123][  T167]  rtmsg_ifinfo_event.part.0 (net/core/rtnetlink.c:4551)
[   98.405267][  T167]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4560)
[   98.405369][  T167]  netif_close_many (net/core/dev.c:1804)
[   98.405503][  T167]  ? asym_cpu_capacity_scan (./include/linux/rculist.h:103)
[   98.405638][  T167]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   98.405771][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.405903][  T167]  ? __dev_close_many (net/core/dev.c:1781)
[   98.406036][  T167]  ? netif_close_many_and_unlock (net/core/dev.c:12330)
[   98.406206][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   98.406377][  T167]  ? select_fallback_rq (kernel/sched/sched.h:1383)
[   98.406512][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.406676][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.406810][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.406943][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.407075][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.407216][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.407354][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   98.407486][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.407619][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.407752][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.407886][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.408023][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.408161][  T167]  __fput (fs/file_table.c:510)
[   98.408271][  T167]  task_work_run (kernel/task_work.c:233)
[   98.408405][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.408538][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   98.408670][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.408806][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.408908][  T167]  ? exit_notify (kernel/exit.c:748)
[   98.409040][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.409178][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.409960][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.410095][  T167]  do_group_exit (kernel/exit.c:1119)
[   98.410928][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.411093][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.411229][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.412210][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.412501][  T167]  get_signal (kernel/signal.c:3037)
[   98.412638][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.412772][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.412909][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[   98.413045][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.413188][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.413328][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.413464][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.413601][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.413769][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.413902][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.414038][  T167]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   98.414175][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.414310][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.414479][  T167] RIP: 0033:0x4c2d9e
[   98.414589][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.414778][  T167] RSP: 002b:00007ffc27bb2bd0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.414979][  T167] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   98.415184][  T167] RDX: 0000000000000014 RSI: 00007ffc27bb2cb0 RDI: 0000000000000007
[   98.415388][  T167] RBP: 00007ffc27bb2be0 R08: 00007ffc27bb2c70 R09: 000000000000000c
[   98.415591][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc27bb3778
[   98.415790][  T167] R13: 00007ffc27bb3800 R14: 00007ffc27bb2da0 R15: 0000000000543540
| [   98.420100][  T167] ------------[ cut here ]------------
| [   98.420271][  T167] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#1: packetdrill/167
| [   98.420534][  T167] Modules linked in:
| [   98.420932][  T167] Tainted: [W]=WARN
[   98.421029][  T167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.421195][  T167] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.421370][  T167] Code: 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 79 48 8b 44 24 58 44 8b 48 08 e9 42 ff ff ff 90 <0f> 0b 90 ba 02 00 00 00 48 89 de 31 ff e8 38 ff f0 ff b9 a6 ff ff
All code
========
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   a:	48 89 f8             	mov    %rdi,%rax
   d:	83 e0 07             	and    $0x7,%eax
  10:	83 c0 03             	add    $0x3,%eax
  13:	38 d0                	cmp    %dl,%al
  15:	7c 04                	jl     0x1b
  17:	84 d2                	test   %dl,%dl
  19:	75 79                	jne    0x94
  1b:	48 8b 44 24 58       	mov    0x58(%rsp),%rax
  20:	44 8b 48 08          	mov    0x8(%rax),%r9d
  24:	e9 42 ff ff ff       	jmp    0xffffffffffffff6b
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 38 ff f0 ff       	call   0xfffffffffff0ff74
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 38 ff f0 ff       	call   0xfffffffffff0ff4a
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   98.421832][  T167] RSP: 0018:ffa00000007f7820 EFLAGS: 00010286
[   98.421996][  T167] RAX: 00000000ffffffa6 RBX: ff11000009a5c940 RCX: 1ff40000000feeca
[   98.422193][  T167] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000009a5c9f0
[   98.422389][  T167] RBP: ff11000004998000 R08: 1fe220000134b93f R09: ff1100000ce5d158
[   98.422578][  T167] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff
[   98.422770][  T167] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.422960][  T167] FS:  0000000000000000(0000) GS:ff11000082c53000(0000) knlGS:0000000000000000
[   98.423189][  T167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.423356][  T167] CR2: 0000555711b7a1b0 CR3: 0000000017739001 CR4: 0000000000771ef0
[   98.423546][  T167] PKRU: 55555554
[   98.423642][  T167] Call Trace:
[   98.423738][  T167]  <TASK>
[   98.423806][  T167]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.423973][  T167]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.424131][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.424268][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.424397][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.424526][  T167]  ? __queue_work (./include/linux/rcupdate.h:310 (discriminator 2) ./include/linux/rcupdate.h:869 (discriminator 2) kernel/workqueue.c:2402 (discriminator 2))
[   98.424655][  T167]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309 net/core/dev.c:12299)
[   98.424782][  T167]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   98.424910][  T167]  ? unregister_netdevice_many (net/core/dev.c:12497)
[   98.425038][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.425169][  T167]  ? queue_delayed_work_on (kernel/workqueue.c:2616 (discriminator 6))
[   98.425303][  T167]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   98.425433][  T167]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   98.425560][  T167]  __fput (fs/file_table.c:510)
[   98.425660][  T167]  task_work_run (kernel/task_work.c:233)
[   98.425789][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.425916][  T167]  ? task_work_cancel (kernel/task_work.c:190)
[   98.426044][  T167]  ? kmem_cache_free (./include/linux/kasan.h:235 mm/slub.c:2689 mm/slub.c:6250 mm/slub.c:6377)
[   98.426179][  T167]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   98.426278][  T167]  ? exit_notify (kernel/exit.c:748)
[   98.426408][  T167]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   98.426536][  T167]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.426663][  T167]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   98.426792][  T167]  do_group_exit (kernel/exit.c:1119)
[   98.426919][  T167]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   98.427079][  T167]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   98.427212][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:187 kernel/locking/spinlock.c:206)
[   98.427345][  T167]  ? _raw_spin_unlock_irq (./include/linux/spinlock_api_smp.h:188 (discriminator 1) kernel/locking/spinlock.c:206 (discriminator 1))
[   98.427641][  T167]  get_signal (kernel/signal.c:3037)
[   98.427806][  T167]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[   98.427938][  T167]  ? __ia32_sys_getpeername (net/socket.c:2219)
[   98.428084][  T167]  ? __might_fault (mm/memory.c:7340 (discriminator 5))
[   98.428322][  T167]  ? ptrace_signal (./include/linux/signal.h:87)
[   98.428470][  T167]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   98.428613][  T167]  ? get_sigframe_size (arch/x86/kernel/signal.c:233)
[   98.428757][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.428979][  T167]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.429150][  T167]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   98.429285][  T167]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.429415][  T167]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   98.429626][  T167]  ? irq_exit_rcu (kernel/softirq.c:754)
[   98.429755][  T167]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   98.429913][  T167] RIP: 0033:0x4c2d9e
[   98.430016][  T167] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   98.430279][  T167] RSP: 002b:00007ffc27bb2bd0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   98.430472][  T167] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   98.430747][  T167] RDX: 0000000000000014 RSI: 00007ffc27bb2cb0 RDI: 0000000000000007
[   98.430936][  T167] RBP: 00007ffc27bb2be0 R08: 00007ffc27bb2c70 R09: 000000000000000c
[   98.431125][  T167] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc27bb3778
[   98.431324][  T167] R13: 00007ffc27bb3800 R14: 00007ffc27bb2da0 R15: 0000000000543540
| [   98.458676][   T12] ------------[ cut here ]------------
| [   98.458890][   T12] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0x1a6/0x250, CPU#3: 0/12
| [   98.459130][   T12] Modules linked in:
| [   98.459593][   T12] Tainted: [W]=WARN
[   98.459685][   T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   98.459843][   T12] Workqueue: netns cleanup_net
[   98.459980][   T12] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   98.460139][   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
[   98.460636][   T12] RSP: 0018:ffa00000000c7878 EFLAGS: 00010286
[   98.460856][   T12] RAX: 00000000ffffffa6 RBX: ff11000009a5de40 RCX: 1ff4000000018ed5
[   98.461039][   T12] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff11000009a5def0
[   98.461223][   T12] RBP: ff1100000a0d1000 R08: 1fe220000134bbdf R09: ff11000001afd1d0
[   98.461415][   T12] R10: 0000000000000003 R11: 0000000000000001 R12: 00000000ffffffff
[   98.461609][   T12] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   98.461790][   T12] FS:  0000000000000000(0000) GS:ff11000082d53000(0000) knlGS:0000000000000000
[   98.462000][   T12] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   98.462154][   T12] CR2: 00007f2f128ad770 CR3: 00000000049f0004 CR4: 0000000000771ef0
[   98.462339][   T12] PKRU: 55555554
[   98.462431][   T12] Call Trace:
[   98.462520][   T12]  <TASK>
[   98.462583][   T12]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   98.462737][   T12]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[   98.462887][   T12]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[   98.463007][   T12]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   98.463131][   T12]  ? generic_xdp_install (./include/linux/netdevice.h:5659)
[   98.463261][   T12]  ? ipmr_free_table (net/ipv4/ipmr.c:453)
[   98.463382][   T12]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[   98.463503][   T12]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[   98.463623][   T12]  ? nexthop_net_exit_rtnl (./include/linux/rtnetlink.h:150 (discriminator 1) net/ipv4/nexthop.c:4145 (discriminator 1))
[   98.463743][   T12]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   98.463869][   T12]  ? rtnl_net_dumpid_one (net/core/net_namespace.c:1094)
[   98.463988][   T12]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   98.464110][   T12]  cleanup_net (net/core/net_namespace.c:702)
[   98.464245][   T12]  ? net_passive_dec (./include/linux/llist.h:241)
[   98.464364][   T12]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[   98.464484][   T12]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   98.464604][   T12]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   98.464726][   T12]  process_one_work (kernel/workqueue.c:3314)
[   98.464850][   T12]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[   98.464967][   T12]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   98.465095][   T12]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   98.465224][   T12]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[   98.465355][   T12]  kthread (kernel/kthread.c:436)
[   98.465447][   T12]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   98.465596][   T12]  ? kthread_affine_node (kernel/kthread.c:378)
[   98.465716][   T12]  ret_from_fork (arch/x86/kernel/process.c:158)
[   98.465835][   T12]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[   98.465985][   T12]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[   98.466108][   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