======================================
| xx__-> [  411.454013] ------------[ cut here ]------------
| [  411.454067] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/557
| [  411.454120] Modules linked in:
| [  411.454207] Tainted: [W]=WARN
[  411.454228] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  411.454266] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  411.454296] 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
[  411.454394] RSP: 0018:ff6a9ac8408c7cc8 EFLAGS: 00010286
[  411.454427] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  411.454465] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e83840600
[  411.454504] RBP: 0000000000000000 R08: ff48218e8386b090 R09: ff48218e82dc702c
[  411.454544] R10: ff48218e82dc4118 R11: fefefefefefefeff R12: 0000000000000000
[  411.454582] R13: 0000000000000010 R14: ff48218e82dc4000 R15: ff48218e83840600
[  411.454625] FS:  00007fbc64ce9740(0000) GS:ff48218f0ca16000(0000) knlGS:0000000000000000
[  411.454671] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  411.454706] CR2: 000055a3232b9008 CR3: 0000000001c73003 CR4: 0000000000771ef0
[  411.454750] PKRU: 55555554
[  411.454766] Call Trace:
[  411.454782]  <TASK>
[  411.454795]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  411.454817]  register_netdevice (net/core/dev.c:11488)
[  411.454842]  register_netdev (net/core/dev.c:11552)
[  411.454863]  loopback_net_init (drivers/net/loopback.c:218)
[  411.454884]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[  411.454917]  ops_init (net/core/net_namespace.c:137)
[  411.454940]  setup_net (net/core/net_namespace.c:446)
[  411.454961]  copy_net_ns (net/core/net_namespace.c:579)
[  411.454986]  create_new_namespaces (kernel/nsproxy.c:132)
[  411.455015]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[  411.455044]  ksys_unshare (kernel/fork.c:3243)
[  411.455068]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[  411.455088]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  411.455109]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  411.455134] RIP: 0033:0x7fbc64de4bcb
[  411.455152] 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
[  411.455244] RSP: 002b:00007fff85641738 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  411.455286] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbc64de4bcb
[  411.455325] RDX: 0000000000000000 RSI: 00007fff856414a0 RDI: 0000000040000000
[  411.455363] RBP: 00007fff85641ac0 R08: 00007fff85641690 R09: 0000000000000000
[  411.455404] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  411.455447] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055a314728b68
| [  411.456143] ------------[ cut here ]------------
| [  411.456178] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/557
| [  411.456222] Modules linked in:
| [  411.456295] Tainted: [W]=WARN
[  411.456339] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  411.456371] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  411.456402] 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
[  411.456498] RSP: 0018:ff6a9ac8408c7d68 EFLAGS: 00010286
[  411.456526] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  411.456567] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e83840600
[  411.456604] RBP: 0000000000000000 R08: ff48218e83829110 R09: ff48218e82061030
[  411.456642] R10: ff48218e82ff0118 R11: fefefefefefefeff R12: 0000000000000000
[  411.456684] R13: 0000000000000010 R14: ff48218e82ff0000 R15: ff48218e83840600
[  411.456735] FS:  0000000015c8e400(0000) GS:ff48218f0ca16000(0000) knlGS:0000000000000000
[  411.456783] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  411.456818] CR2: 00007efcb0b69000 CR3: 000000000397e004 CR4: 0000000000771ef0
[  411.456863] PKRU: 55555554
[  411.456877] Call Trace:
[  411.456893]  <TASK>
[  411.456908]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  411.456931]  register_netdevice (net/core/dev.c:11488)
[  411.456951]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[  411.456972]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[  411.456996]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  411.457019]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  411.457038]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  411.457066] RIP: 0033:0x47cc8d
[  411.457087] 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 
[  411.457190] RSP: 002b:00007ffd61266720 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  411.457236] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  411.457278] RDX: 00007ffd612667a0 RSI: 00000000400454ca RDI: 0000000000000005
[  411.457318] RBP: 00007ffd61266770 R08: 0000000000000000 R09: 0000000000000000
[  411.457360] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd61266c78
[  411.457402] R13: 00007ffd61266cf8 R14: 0000000000000002 R15: 0000000000543540
| [  411.457511] ------------[ cut here ]------------
| [  411.457543] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/557
| [  411.457596] Modules linked in:
| [  411.457681] Tainted: [W]=WARN
[  411.457706] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  411.457747] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  411.457778] 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
[  411.457876] RSP: 0018:ff6a9ac8408c7d60 EFLAGS: 00010286
[  411.457905] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  411.457943] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e83840600
[  411.457982] RBP: 0000000000000002 R08: ff48218e83829110 R09: ff48218e82061030
[  411.458029] R10: ff48218e82ff0118 R11: fefefefefefefeff R12: 0000000000000000
[  411.458068] R13: 0000000000000010 R14: ff48218e82ff0000 R15: ff48218e83840600
[  411.458117] FS:  0000000015c8e400(0000) GS:ff48218f0ca16000(0000) knlGS:0000000000000000
[  411.458158] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  411.458195] CR2: 00007efcb0b69000 CR3: 000000000397e004 CR4: 0000000000771ef0
[  411.458236] PKRU: 55555554
[  411.458254] Call Trace:
[  411.458266]  <TASK>
[  411.458282]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[  411.458304]  notifier_call_chain (kernel/notifier.c:85)
[  411.458328]  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)
[  411.458362]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[  411.458382]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[  411.458412]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  411.458438]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  411.458459]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  411.458489] RIP: 0033:0x47cc8d
[  411.458510] 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 
[  411.458609] RSP: 002b:00007ffd61266760 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  411.458651] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  411.458694] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  411.458739] RBP: 00007ffd612667b0 R08: 0000000000000000 R09: 0000000000000000
[  411.458785] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd61266c78
[  411.458828] R13: 00007ffd61266cf8 R14: 0000000000000002 R15: 0000000000543540
| [  411.458932] ------------[ cut here ]------------
| [  411.458960] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/557
| [  411.459015] Modules linked in:
| [  411.459102] Tainted: [W]=WARN
[  411.459126] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  411.459165] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  411.459195] 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
[  411.459300] RSP: 0018:ff6a9ac8408c7c10 EFLAGS: 00010286
[  411.459330] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  411.459376] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e83840600
[  411.459422] RBP: 0000000000000000 R08: ff48218e83829110 R09: ff48218e81137030
[  411.459473] R10: ff48218e82ff0118 R11: fefefefefefefeff R12: 0000000000000000
[  411.459517] R13: 0000000000000010 R14: ff48218e82ff0000 R15: ff48218e83840600
[  411.459563] FS:  0000000015c8e400(0000) GS:ff48218f0ca16000(0000) knlGS:0000000000000000
[  411.459610] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  411.459647] CR2: 00007efcb0b69000 CR3: 000000000397e004 CR4: 0000000000771ef0
[  411.459693] PKRU: 55555554
[  411.459709] Call Trace:
[  411.459726]  <TASK>
[  411.459742]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  411.459767]  __dev_notify_flags (net/core/dev.c:9787)
[  411.459793]  netif_change_flags (net/core/dev.c:9820)
[  411.459823]  dev_change_flags (net/core/dev_api.c:68)
[  411.459844]  devinet_ioctl (net/ipv4/devinet.c:1199)
[  411.459871]  inet_ioctl (net/ipv4/af_inet.c:1011)
[  411.459893]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[  411.459919]  sock_do_ioctl (net/socket.c:1313)
[  411.459944]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  411.459964]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  411.459988]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  411.460014] RIP: 0033:0x47cc8d
[  411.460035] 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 
[  411.460133] RSP: 002b:00007ffd61266740 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  411.460174] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  411.460221] RDX: 00007ffd612667b0 RSI: 0000000000008914 RDI: 0000000000000006
[  411.460260] RBP: 00007ffd61266790 R08: 0000000000000000 R09: 0000000000000000
[  411.460300] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd61266c78
[  411.460346] R13: 00007ffd61266cf8 R14: 0000000000000002 R15: 0000000000543540
| [  456.440054] ------------[ cut here ]------------
| [  456.440136] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/557
| [  456.440189] Modules linked in:
| [  456.440264] Tainted: [W]=WARN
[  456.440286] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  456.440318] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  456.440348] 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
[  456.440437] RSP: 0018:ff6a9ac8408c7b58 EFLAGS: 00010286
[  456.440465] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  456.440504] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e81debd00
[  456.440554] RBP: 0000000000000000 R08: ff48218e83829110 R09: ff48218e81137030
[  456.440596] R10: ff48218e82ff0118 R11: fefefefefefefeff R12: 0000000000000000
[  456.440638] R13: 0000000000000010 R14: ff48218e82ff0000 R15: ff48218e81debd00
[  456.440689] FS:  0000000000000000(0000) GS:ff48218f0ca16000(0000) knlGS:0000000000000000
[  456.440734] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  456.440773] CR2: 00007efcb0b69000 CR3: 0000000025242006 CR4: 0000000000771ef0
[  456.440817] PKRU: 55555554
[  456.440831] Call Trace:
[  456.440846]  <TASK>
[  456.440864]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  456.440891]  netif_close_many (net/core/dev.c:1804)
[  456.440913]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[  456.440944]  ? __queue_work (kernel/workqueue.c:2401)
[  456.440969]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  456.440998]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  456.441022]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  456.441043]  __fput (fs/file_table.c:510)
[  456.441066]  task_work_run (kernel/task_work.c:233)
[  456.441089]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  456.441109]  do_group_exit (kernel/exit.c:1119)
[  456.441130]  get_signal (kernel/signal.c:3037)
[  456.441153]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  456.441183]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  456.441215]  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)
[  456.441238]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  456.441271] RIP: 0033:0x4c2d9e
[  456.441296] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[  456.441334] RSP: 002b:00007ffd612660d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  456.441376] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[  456.441420] RDX: 0000000000000014 RSI: 00007ffd612661b0 RDI: 0000000000000007
[  456.441462] RBP: 00007ffd612660e0 R08: 00007ffd61266170 R09: 000000000000000c
[  456.441502] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000015c97190
[  456.441537] R13: 00007ffd61266cf8 R14: 00007ffd612662a0 R15: 0000000000543540
| [  456.441687] ------------[ cut here ]------------
| [  456.441714] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/557
| [  456.441760] Modules linked in:
| [  456.441833] Tainted: [W]=WARN
[  456.441856] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  456.441893] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  456.441920] 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
[  456.442003] RSP: 0018:ff6a9ac8408c7bc8 EFLAGS: 00010286
[  456.442031] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  456.442073] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e81debd00
[  456.442111] RBP: 0000000000000000 R08: ff48218e83829110 R09: ff48218e87993030
[  456.442151] R10: ff48218e82ff0118 R11: fefefefefefefeff R12: 0000000000000000
[  456.442194] R13: 0000000000000011 R14: ff48218e82ff0000 R15: ff48218e81debd00
[  456.442236] FS:  0000000000000000(0000) GS:ff48218f0ca16000(0000) knlGS:0000000000000000
[  456.442281] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  456.442314] CR2: 00007efcb0b69000 CR3: 0000000025242006 CR4: 0000000000771ef0
[  456.442350] PKRU: 55555554
[  456.442365] Call Trace:
[  456.442376]  <TASK>
[  456.442391]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  456.442419]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  456.442444]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  456.442467]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  456.442488]  __fput (fs/file_table.c:510)
[  456.442512]  task_work_run (kernel/task_work.c:233)
[  456.442537]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  456.442562]  do_group_exit (kernel/exit.c:1119)
[  456.442583]  get_signal (kernel/signal.c:3037)
[  456.442606]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  456.442637]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  456.442665]  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)
[  456.442687]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  456.442713] RIP: 0033:0x4c2d9e
[  456.442736] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[  456.442774] RSP: 002b:00007ffd612660d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  456.442812] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[  456.442851] RDX: 0000000000000014 RSI: 00007ffd612661b0 RDI: 0000000000000007
[  456.442890] RBP: 00007ffd612660e0 R08: 00007ffd61266170 R09: 000000000000000c
[  456.442925] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000015c97190
[  456.442967] R13: 00007ffd61266cf8 R14: 00007ffd612662a0 R15: 0000000000543540
| [  456.453817] ------------[ cut here ]------------
| [  456.453869] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 1/65
| [  456.453930] Modules linked in:
| [  456.454012] Tainted: [W]=WARN
[  456.454035] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  456.454067] Workqueue: netns cleanup_net
[  456.454090] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  456.454118] 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
[  456.454211] RSP: 0018:ff6a9ac84023fc78 EFLAGS: 00010286
[  456.454240] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  456.454280] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e83870000
[  456.454315] RBP: 0000000000000000 R08: ff48218e8386b090 R09: ff48218e8799582c
[  456.454351] R10: ff48218e82dc4118 R11: fefefefefefefeff R12: 0000000000000000
[  456.454391] R13: 0000000000000011 R14: ff48218e82dc4000 R15: ff48218e83870000
[  456.454431] FS:  0000000000000000(0000) GS:ff48218f0c896000(0000) knlGS:0000000000000000
[  456.454473] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  456.454512] CR2: 000055f7f26102b8 CR3: 0000000001939003 CR4: 0000000000771ef0
[  456.454558] PKRU: 55555554
[  456.454571] Call Trace:
[  456.454587]  <TASK>
[  456.454601]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  456.454628]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[  456.454657]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[  456.454679]  cleanup_net (net/core/net_namespace.c:702)
[  456.454701]  process_one_work (kernel/workqueue.c:3314)
[  456.454734]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[  456.454755]  ? rescuer_thread (kernel/workqueue.c:3672)
[  456.454776]  kthread (kernel/kthread.c:436)
[  456.454797]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[  456.454817]  ret_from_fork (arch/x86/kernel/process.c:158)
[  456.454841]  ? 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