======================================
| xx__-> [    2.308255] ------------[ cut here ]------------
| [    2.308357] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/159
| [    2.308508] Modules linked in:
| [    2.308697] Tainted: [W]=WARN
[    2.308751] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.308826] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.308902] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.309067] RSP: 0018:ff5a04814038fcc8 EFLAGS: 00010286
[    2.309132] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.309212] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e400
[    2.309317] RBP: 0000000000000000 R08: ff28aa96432d3590 R09: ff28aa9643d1202c
[    2.309416] R10: ff28aa964321d118 R11: fefefefefefefeff R12: 0000000000000000
[    2.309529] R13: 0000000000000010 R14: ff28aa964321d000 R15: ff28aa964306e400
[    2.309639] FS:  00007f060495b740(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[    2.309733] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.309825] CR2: 000055b4513a9310 CR3: 0000000002fd2004 CR4: 0000000000771ef0
[    2.309907] PKRU: 55555554
[    2.309957] Call Trace:
[    2.310016]  <TASK>
[    2.310084]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.310145]  register_netdevice (net/core/dev.c:11488)
[    2.310209]  register_netdev (net/core/dev.c:11552)
[    2.310273]  loopback_net_init (drivers/net/loopback.c:218)
[    2.310336]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.310413]  ops_init (net/core/net_namespace.c:137)
[    2.310485]  setup_net (net/core/net_namespace.c:446)
[    2.310553]  copy_net_ns (net/core/net_namespace.c:579)
[    2.310621]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.310691]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.310760]  ksys_unshare (kernel/fork.c:3243)
[    2.310826]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.310889]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.310954]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.311021] RIP: 0033:0x7f0604a56bcb
[    2.311081] 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
[    2.311208] RSP: 002b:00007ffc08c40098 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.311293] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0604a56bcb
[    2.311371] RDX: 0000000000000000 RSI: 00007ffc08c3fe00 RDI: 0000000040000000
[    2.311455] RBP: 00007ffc08c40420 R08: 00007ffc08c3fff0 R09: 0000000000000000
[    2.311537] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.311619] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055b4513acb68
| [    2.315018] ------------[ cut here ]------------
| [    2.315084] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
| [    2.315164] Modules linked in:
| [    2.315330] Tainted: [W]=WARN
[    2.315390] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.315470] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.315539] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.315668] RSP: 0018:ff5a04814038fd68 EFLAGS: 00010286
[    2.315732] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.315812] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e400
[    2.315891] RBP: 0000000000000000 R08: ff28aa96432d3210 R09: ff28aa9643d17030
[    2.315967] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.316045] R13: 0000000000000010 R14: ff28aa9643e9c000 R15: ff28aa964306e400
[    2.316127] FS:  000000003da4e400(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[    2.316205] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.316288] CR2: 00007fe17d242000 CR3: 000000000259b005 CR4: 0000000000771ef0
[    2.316369] PKRU: 55555554
[    2.316420] Call Trace:
[    2.316479]  <TASK>
[    2.316530]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.316592]  register_netdevice (net/core/dev.c:11488)
[    2.316653]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.316718]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.316782]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.316847]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.316911]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.316980] RIP: 0033:0x47cc8d
[    2.317042] 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 
[    2.317171] RSP: 002b:00007ffe3387e4d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.317259] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.317337] RDX: 00007ffe3387e550 RSI: 00000000400454ca RDI: 0000000000000005
[    2.317416] RBP: 00007ffe3387e520 R08: 0000000000000000 R09: 0000000000000000
[    2.317496] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3387ea28
[    2.317574] R13: 00007ffe3387eaa8 R14: 0000000000000002 R15: 0000000000543540
| [    2.317790] ------------[ cut here ]------------
| [    2.317867] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
| [    2.317953] Modules linked in:
| [    2.318108] Tainted: [W]=WARN
[    2.318168] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.318247] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.318319] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.318455] RSP: 0018:ff5a04814038fd60 EFLAGS: 00010286
[    2.318522] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.318603] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e400
[    2.318681] RBP: 0000000000000002 R08: ff28aa96432d3210 R09: ff28aa9643d17030
[    2.318761] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.318841] R13: 0000000000000010 R14: ff28aa9643e9c000 R15: ff28aa964306e400
[    2.318927] FS:  000000003da4e400(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[    2.319008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.319083] CR2: 00007fe17d242000 CR3: 000000000259b005 CR4: 0000000000771ef0
[    2.319161] PKRU: 55555554
[    2.319213] Call Trace:
[    2.319267]  <TASK>
[    2.319319]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.319382]  notifier_call_chain (kernel/notifier.c:85)
[    2.319452]  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)
[    2.319517]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.319581]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.319647]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.319712]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.319775]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.319845] RIP: 0033:0x47cc8d
[    2.319907] 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 
[    2.320031] RSP: 002b:00007ffe3387e510 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.320110] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.320189] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.320278] RBP: 00007ffe3387e560 R08: 0000000000000005 R09: 0000000000001ff0
[    2.320360] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffe3387ea28
[    2.320452] R13: 00007ffe3387eaa8 R14: 0000000000000002 R15: 0000000000543540
| [    2.320675] ------------[ cut here ]------------
| [    2.320742] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
| [    2.320833] Modules linked in:
| [    2.320989] Tainted: [W]=WARN
[    2.321050] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.321125] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.321192] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.321327] RSP: 0018:ff5a04814038fc10 EFLAGS: 00010286
[    2.321396] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.321482] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e400
[    2.321563] RBP: 0000000000000000 R08: ff28aa96432d3210 R09: ff28aa9643d14030
[    2.321643] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.321723] R13: 0000000000000010 R14: ff28aa9643e9c000 R15: ff28aa964306e400
[    2.321804] FS:  000000003da4e400(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[    2.321880] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.321952] CR2: 00007fe17d242000 CR3: 000000000259b005 CR4: 0000000000771ef0
[    2.322034] PKRU: 55555554
[    2.322082] Call Trace:
[    2.322134]  <TASK>
[    2.322187]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.322255]  __dev_notify_flags (net/core/dev.c:9787)
[    2.322318]  netif_change_flags (net/core/dev.c:9820)
[    2.322382]  dev_change_flags (net/core/dev_api.c:68)
[    2.322451]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.322517]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.322580]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.322642]  sock_do_ioctl (net/socket.c:1313)
[    2.322707]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.322768]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.322832]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.322902] RIP: 0033:0x47cc8d
[    2.322964] 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 
[    2.323089] RSP: 002b:00007ffe3387e4f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.323168] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.323252] RDX: 00007ffe3387e560 RSI: 0000000000008914 RDI: 0000000000000006
[    2.323331] RBP: 00007ffe3387e540 R08: 0000000000000005 R09: 0000000000001ff0
[    2.323409] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffe3387ea28
[    2.323495] R13: 00007ffe3387eaa8 R14: 0000000000000002 R15: 0000000000543540
| [   47.290272] ------------[ cut here ]------------
| [   47.290422] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
| [   47.290648] Modules linked in:
| [   47.290813] Tainted: [W]=WARN
[   47.290869] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.290941] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.291005] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.291148] RSP: 0018:ff5a04814038fb58 EFLAGS: 00010286
[   47.291211] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.291290] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa9643070100
[   47.291367] RBP: 0000000000000000 R08: ff28aa96432d3210 R09: ff28aa9643d14030
[   47.291453] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.291528] R13: 0000000000000010 R14: ff28aa9643e9c000 R15: ff28aa9643070100
[   47.291610] FS:  0000000000000000(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[   47.291691] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.291762] CR2: 00007fe17d242000 CR3: 0000000002599006 CR4: 0000000000771ef0
[   47.291844] PKRU: 55555554
[   47.291893] Call Trace:
[   47.291943]  <TASK>
[   47.291993]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.292051]  netif_close_many (net/core/dev.c:1804)
[   47.292110]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.292175]  ? __queue_work (kernel/workqueue.c:2401)
[   47.292235]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.292300]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.292362]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.292431]  __fput (fs/file_table.c:510)
[   47.292491]  task_work_run (kernel/task_work.c:233)
[   47.292549]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.292607]  do_group_exit (kernel/exit.c:1119)
[   47.292667]  get_signal (kernel/signal.c:3037)
[   47.292726]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.292792]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.292858]  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)
[   47.292918]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.292982] RIP: 0033:0x4c2d9e
[   47.293039] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.293107] RSP: 002b:00007ffe3387de80 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.293187] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.293262] RDX: 0000000000000014 RSI: 00007ffe3387df60 RDI: 0000000000000007
[   47.293339] RBP: 00007ffe3387de90 R08: 00007ffe3387df20 R09: 000000000000000c
[   47.293430] R10: 0000000000000000 R11: 0000000000000202 R12: 000000003da59430
[   47.293506] R13: 00007ffe3387eaa8 R14: 00007ffe3387e050 R15: 0000000000543540
| [   47.293793] ------------[ cut here ]------------
| [   47.293831] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [   47.293884] Modules linked in:
| [   47.293986] Tainted: [W]=WARN
[   47.294008] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.294045] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.294074] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.294176] RSP: 0018:ff5a04814038fbc8 EFLAGS: 00010286
[   47.294207] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.294253] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa9641dee500
[   47.294297] RBP: 0000000000000000 R08: ff28aa96432d3210 R09: ff28aa96419bc830
[   47.294342] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.294392] R13: 0000000000000011 R14: ff28aa9643e9c000 R15: ff28aa9641dee500
[   47.294443] FS:  0000000000000000(0000) GS:ff28aa96f4816000(0000) knlGS:0000000000000000
[   47.294489] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.294525] CR2: 000055d286866c80 CR3: 0000000039642006 CR4: 0000000000771ef0
[   47.294572] PKRU: 55555554
[   47.294586] Call Trace:
[   47.294602]  <TASK>
[   47.294620]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.294653]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.294685]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.294710]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.294734]  __fput (fs/file_table.c:510)
[   47.294762]  task_work_run (kernel/task_work.c:233)
[   47.294787]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.294812]  do_group_exit (kernel/exit.c:1119)
[   47.294834]  get_signal (kernel/signal.c:3037)
[   47.294856]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.294887]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.294919]  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)
[   47.294945]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.294977] RIP: 0033:0x4c2d9e
[   47.295000] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.295034] RSP: 002b:00007ffe3387de80 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.295083] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.295125] RDX: 0000000000000014 RSI: 00007ffe3387df60 RDI: 0000000000000007
[   47.295169] RBP: 00007ffe3387de90 R08: 00007ffe3387df20 R09: 000000000000000c
[   47.295213] R10: 0000000000000000 R11: 0000000000000202 R12: 000000003da59430
[   47.295258] R13: 00007ffe3387eaa8 R14: 00007ffe3387e050 R15: 0000000000543540
| [   47.304525] ------------[ cut here ]------------
| [   47.304569] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 1/65
| [   47.304638] Modules linked in:
| [   47.304726] Tainted: [W]=WARN
[   47.304747] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.304779] Workqueue: netns cleanup_net
[   47.304807] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.304838] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  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:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.304939] RSP: 0018:ff5a04814023fc78 EFLAGS: 00010286
[   47.304967] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.305010] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e300
[   47.305052] RBP: 0000000000000000 R08: ff28aa96432d3590 R09: ff28aa96419be82c
[   47.305085] R10: ff28aa964321d118 R11: fefefefefefefeff R12: 0000000000000000
[   47.305130] R13: 0000000000000011 R14: ff28aa964321d000 R15: ff28aa964306e300
[   47.305176] FS:  0000000000000000(0000) GS:ff28aa96f4696000(0000) knlGS:0000000000000000
[   47.305211] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.305246] CR2: 00007f58efeb6f98 CR3: 0000000039642002 CR4: 0000000000771ef0
[   47.305291] PKRU: 55555554
[   47.305306] Call Trace:
[   47.305319]  <TASK>
[   47.305335]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.305364]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.305398]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.305419]  cleanup_net (net/core/net_namespace.c:702)
[   47.305447]  process_one_work (kernel/workqueue.c:3314)
[   47.305473]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.305496]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.305519]  kthread (kernel/kthread.c:436)
[   47.305541]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.305565]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.305587]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))


Finger prints:
rtmsg_ifinfo_build_skb:rtmsg_ifinfo:__dev_notify_flags:netif_change_flags:dev_change_flags
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:rtmsg_ifinfo:netif_close_many:unregister_netdevice_many_notify:unregister_netdevice_queue
rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:unregister_netdevice_queue:__tun_detach:tun_chr_close
rtmsg_ifinfo_build_skb:unregister_netdevice_many_notify:default_device_exit_batch:ops_undo_list:cleanup_net
rtmsg_ifinfo_build_skb:rtnetlink_event:notifier_call_chain:netdev_update_features:__tun_chr_ioctl