======================================
| xx__-> [  184.138048] ------------[ cut here ]------------
| [  184.138134] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/339
| [  184.138250] Modules linked in:
| [  184.138405] Tainted: [W]=WARN
[  184.138468] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.138541] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  184.138612] 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
[  184.138754] RSP: 0018:ff6c7b1cc062fcc8 EFLAGS: 00010286
[  184.138824] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  184.138908] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c43400
[  184.138990] RBP: 0000000000000000 R08: ff2e1d1dc3275f90 R09: ff2e1d1dc320b02c
[  184.139068] R10: ff2e1d1dc6470118 R11: fefefefefefefeff R12: 0000000000000000
[  184.139154] R13: 0000000000000010 R14: ff2e1d1dc6470000 R15: ff2e1d1dc1c43400
[  184.139240] FS:  00007f1d12bd3740(0000) GS:ff2e1d1e70b96000(0000) knlGS:0000000000000000
[  184.139320] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.139395] CR2: 0000560b324ea008 CR3: 0000000001885004 CR4: 0000000000771ef0
[  184.139478] PKRU: 55555554
[  184.139531] Call Trace:
[  184.139584]  <TASK>
[  184.139644]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  184.139713]  register_netdevice (net/core/dev.c:11488)
[  184.139775]  register_netdev (net/core/dev.c:11552)
[  184.139839]  loopback_net_init (drivers/net/loopback.c:218)
[  184.139912]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[  184.139983]  ops_init (net/core/net_namespace.c:137)
[  184.140048]  setup_net (net/core/net_namespace.c:446)
[  184.140113]  copy_net_ns (net/core/net_namespace.c:579)
[  184.140181]  create_new_namespaces (kernel/nsproxy.c:132)
[  184.140252]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[  184.140322]  ksys_unshare (kernel/fork.c:3243)
[  184.140388]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[  184.140452]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.140517]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  184.140588] RIP: 0033:0x7f1d12ccebcb
[  184.140655] 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
[  184.140801] RSP: 002b:00007ffd8ab433e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  184.140892] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1d12ccebcb
[  184.140969] RDX: 0000000000000000 RSI: 00007ffd8ab43150 RDI: 0000000040000000
[  184.141050] RBP: 00007ffd8ab43770 R08: 00007ffd8ab43340 R09: 0000000000000000
[  184.141130] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  184.141212] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000560b18312b68
| [  184.142109] ------------[ cut here ]------------
| [  184.142182] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/339
| [  184.142274] Modules linked in:
| [  184.142425] Tainted: [W]=WARN
[  184.142481] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.142551] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  184.142615] 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
[  184.142763] RSP: 0018:ff6c7b1cc062fd68 EFLAGS: 00010286
[  184.142828] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  184.142906] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c43400
[  184.142983] RBP: 0000000000000000 R08: ff2e1d1dc192b350 R09: ff2e1d1dc1caa030
[  184.143062] R10: ff2e1d1dc32b4118 R11: fefefefefefefeff R12: 0000000000000000
[  184.143147] R13: 0000000000000010 R14: ff2e1d1dc32b4000 R15: ff2e1d1dc1c43400
[  184.143230] FS:  000000002b6f0400(0000) GS:ff2e1d1e70b96000(0000) knlGS:0000000000000000
[  184.143310] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.143380] CR2: 00007fe9e25c1000 CR3: 0000000004943005 CR4: 0000000000771ef0
[  184.143460] PKRU: 55555554
[  184.143509] Call Trace:
[  184.143559]  <TASK>
[  184.143608]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  184.143671]  register_netdevice (net/core/dev.c:11488)
[  184.143735]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[  184.143798]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[  184.143858]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  184.143919]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.143977]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  184.144042] RIP: 0033:0x47cc8d
[  184.144099] 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 
[  184.144246] RSP: 002b:00007ffce0ea95e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  184.144326] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  184.144404] RDX: 00007ffce0ea9660 RSI: 00000000400454ca RDI: 0000000000000005
[  184.144482] RBP: 00007ffce0ea9630 R08: 0000000000000000 R09: 0000000000000000
[  184.144562] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffce0ea9b38
[  184.144645] R13: 00007ffce0ea9bb8 R14: 0000000000000002 R15: 0000000000543540
| [  184.144862] ------------[ cut here ]------------
| [  184.144925] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/339
| [  184.145013] Modules linked in:
| [  184.145171] Tainted: [W]=WARN
[  184.145229] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.145299] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  184.145365] 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
[  184.145504] RSP: 0018:ff6c7b1cc062fd60 EFLAGS: 00010286
[  184.145576] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  184.145665] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c43400
[  184.145756] RBP: 0000000000000002 R08: ff2e1d1dc192b350 R09: ff2e1d1dc1caa030
[  184.145838] R10: ff2e1d1dc32b4118 R11: fefefefefefefeff R12: 0000000000000000
[  184.145917] R13: 0000000000000010 R14: ff2e1d1dc32b4000 R15: ff2e1d1dc1c43400
[  184.146002] FS:  000000002b6f0400(0000) GS:ff2e1d1e70b96000(0000) knlGS:0000000000000000
[  184.146082] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.146164] CR2: 00007fe9e25c1000 CR3: 0000000004943005 CR4: 0000000000771ef0
[  184.146247] PKRU: 55555554
[  184.146299] Call Trace:
[  184.146352]  <TASK>
[  184.146405]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[  184.146470]  notifier_call_chain (kernel/notifier.c:85)
[  184.146537]  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)
[  184.146609]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[  184.146678]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[  184.146744]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  184.146807]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.146870]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  184.146940] RIP: 0033:0x47cc8d
[  184.146999] 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 
[  184.147129] RSP: 002b:00007ffce0ea9620 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  184.147216] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  184.147297] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  184.147378] RBP: 00007ffce0ea9670 R08: 0000000000000005 R09: 0000000000001ff0
[  184.147459] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffce0ea9b38
[  184.147537] R13: 00007ffce0ea9bb8 R14: 0000000000000002 R15: 0000000000543540
| [  184.147769] ------------[ cut here ]------------
| [  184.147832] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/339
| [  184.147921] Modules linked in:
| [  184.148076] Tainted: [W]=WARN
[  184.148146] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  184.148221] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  184.148291] 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
[  184.148419] RSP: 0018:ff6c7b1cc062fc10 EFLAGS: 00010286
[  184.148488] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  184.148569] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c43400
[  184.148656] RBP: 0000000000000000 R08: ff2e1d1dc192b350 R09: ff2e1d1dc2e5d030
[  184.148745] R10: ff2e1d1dc32b4118 R11: fefefefefefefeff R12: 0000000000000000
[  184.148828] R13: 0000000000000010 R14: ff2e1d1dc32b4000 R15: ff2e1d1dc1c43400
[  184.148913] FS:  000000002b6f0400(0000) GS:ff2e1d1e70b96000(0000) knlGS:0000000000000000
[  184.148998] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  184.149073] CR2: 00007fe9e25c1000 CR3: 0000000004943005 CR4: 0000000000771ef0
[  184.149163] PKRU: 55555554
[  184.149217] Call Trace:
[  184.149268]  <TASK>
[  184.149322]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  184.149388]  __dev_notify_flags (net/core/dev.c:9787)
[  184.149455]  netif_change_flags (net/core/dev.c:9820)
[  184.149521]  dev_change_flags (net/core/dev_api.c:68)
[  184.149585]  devinet_ioctl (net/ipv4/devinet.c:1199)
[  184.149658]  inet_ioctl (net/ipv4/af_inet.c:1011)
[  184.149723]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[  184.149790]  sock_do_ioctl (net/socket.c:1313)
[  184.149857]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  184.149917]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  184.149982]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  184.150049] RIP: 0033:0x47cc8d
[  184.150112] 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 
[  184.150251] RSP: 002b:00007ffce0ea9600 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  184.150334] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  184.150415] RDX: 00007ffce0ea9670 RSI: 0000000000008914 RDI: 0000000000000006
[  184.150492] RBP: 00007ffce0ea9650 R08: 0000000000000005 R09: 0000000000001ff0
[  184.150573] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffce0ea9b38
[  184.150660] R13: 00007ffce0ea9bb8 R14: 0000000000000002 R15: 0000000000543540
| [  229.123135] ------------[ cut here ]------------
| [  229.123270] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/339
| [  229.123376] Modules linked in:
| [  229.123553] Tainted: [W]=WARN
[  229.123610] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.123857] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  229.123934] 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
[  229.124077] RSP: 0018:ff6c7b1cc062fb58 EFLAGS: 00010286
[  229.124142] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  229.124223] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c42600
[  229.124302] RBP: 0000000000000000 R08: ff2e1d1dc192b350 R09: ff2e1d1dc2e5c030
[  229.124381] R10: ff2e1d1dc32b4118 R11: fefefefefefefeff R12: 0000000000000000
[  229.124463] R13: 0000000000000010 R14: ff2e1d1dc32b4000 R15: ff2e1d1dc1c42600
[  229.124554] FS:  0000000000000000(0000) GS:ff2e1d1e70b96000(0000) knlGS:0000000000000000
[  229.124642] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.124719] CR2: 00007fe9e25c1000 CR3: 000000002e442006 CR4: 0000000000771ef0
[  229.124802] PKRU: 55555554
[  229.124851] Call Trace:
[  229.124902]  <TASK>
[  229.124953]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  229.125012]  netif_close_many (net/core/dev.c:1804)
[  229.125072]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[  229.125139]  ? __queue_work (kernel/workqueue.c:2401)
[  229.125208]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  229.125276]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  229.125343]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  229.125402]  __fput (fs/file_table.c:510)
[  229.125464]  task_work_run (kernel/task_work.c:233)
[  229.125530]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  229.125595]  do_group_exit (kernel/exit.c:1119)
[  229.125661]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[  229.125723]  get_signal (kernel/signal.c:3037)
[  229.125785]  ? sysvec_reschedule_ipi (./arch/x86/include/asm/apic.h:410 (discriminator 1) arch/x86/kernel/smp.c:251 (discriminator 1) arch/x86/kernel/smp.c:249 (discriminator 1) arch/x86/kernel/smp.c:249 (discriminator 1))
[  229.125853]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  229.125921]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  229.125988]  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)
[  229.126047]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  229.126113] RIP: 0033:0x4c2d9e
[  229.126171] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[  229.126250] RSP: 002b:00007ffce0ea8f90 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  229.126332] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  229.126413] RDX: 0000000000000014 RSI: 00007ffce0ea9070 RDI: 0000000000000007
[  229.126493] RBP: 00007ffce0ea8fa0 R08: 00007ffce0ea9030 R09: 000000000000000c
[  229.126579] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffce0ea9b38
[  229.126663] R13: 00007ffce0ea9bb8 R14: 00007ffce0ea9160 R15: 0000000000543540
| [  229.126942] ------------[ cut here ]------------
| [  229.126977] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/339
| [  229.127035] Modules linked in:
| [  229.127129] Tainted: [W]=WARN
[  229.127153] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.127185] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  229.127216] 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
[  229.127389] RSP: 0018:ff6c7b1cc062fbc8 EFLAGS: 00010286
[  229.127442] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  229.127532] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc3132300
[  229.127591] RBP: 0000000000000000 R08: ff2e1d1dc192b350 R09: ff2e1d1dc4a71030
[  229.127670] R10: ff2e1d1dc32b4118 R11: fefefefefefefeff R12: 0000000000000000
[  229.127722] R13: 0000000000000011 R14: ff2e1d1dc32b4000 R15: ff2e1d1dc3132300
[  229.127814] FS:  0000000000000000(0000) GS:ff2e1d1e70c16000(0000) knlGS:0000000000000000
[  229.127870] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.127921] CR2: 00007fad8aecd620 CR3: 000000002e442002 CR4: 0000000000771ef0
[  229.128002] PKRU: 55555554
[  229.128026] Call Trace:
[  229.128055]  <TASK>
[  229.128083]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  229.128138]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  229.128186]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  229.128218]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  229.128261]  __fput (fs/file_table.c:510)
[  229.128299]  task_work_run (kernel/task_work.c:233)
[  229.128343]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  229.128387]  do_group_exit (kernel/exit.c:1119)
[  229.128426]  ? __sys_sendto (net/socket.c:787 (discriminator 4) net/socket.c:802 (discriminator 4) net/socket.c:2265 (discriminator 4))
[  229.128470]  get_signal (kernel/signal.c:3037)
[  229.128501]  ? sysvec_reschedule_ipi (./arch/x86/include/asm/apic.h:410 (discriminator 1) arch/x86/kernel/smp.c:251 (discriminator 1) arch/x86/kernel/smp.c:249 (discriminator 1) arch/x86/kernel/smp.c:249 (discriminator 1))
[  229.128564]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  229.128621]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  229.128690]  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)
[  229.128736]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  229.128775] RIP: 0033:0x4c2d9e
[  229.128805] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[  229.128861] RSP: 002b:00007ffce0ea8f90 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  229.128902] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  229.128950] RDX: 0000000000000014 RSI: 00007ffce0ea9070 RDI: 0000000000000007
[  229.129000] RBP: 00007ffce0ea8fa0 R08: 00007ffce0ea9030 R09: 000000000000000c
[  229.129047] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffce0ea9b38
[  229.129091] R13: 00007ffce0ea9bb8 R14: 00007ffce0ea9160 R15: 0000000000543540
| [  229.138754] ------------[ cut here ]------------
| [  229.138797] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: 1/65
| [  229.138866] Modules linked in:
| [  229.138960] Tainted: [W]=WARN
[  229.138984] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.139024] Workqueue: netns cleanup_net
[  229.139050] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  229.139082] 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
[  229.139185] RSP: 0018:ff6c7b1cc023fc78 EFLAGS: 00010286
[  229.139215] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  229.139258] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc3174c00
[  229.139303] RBP: 0000000000000000 R08: ff2e1d1dc3275f90 R09: ff2e1d1dc4a7982c
[  229.139347] R10: ff2e1d1dc6470118 R11: fefefefefefefeff R12: 0000000000000000
[  229.139391] R13: 0000000000000011 R14: ff2e1d1dc6470000 R15: ff2e1d1dc3174c00
[  229.139439] FS:  0000000000000000(0000) GS:ff2e1d1e70b16000(0000) knlGS:0000000000000000
[  229.139476] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.139521] CR2: 00007f5fc944f0a0 CR3: 000000002e442006 CR4: 0000000000771ef0
[  229.139564] PKRU: 55555554
[  229.139579] Call Trace:
[  229.139594]  <TASK>
[  229.139607]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  229.139644]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[  229.139673]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[  229.139697]  cleanup_net (net/core/net_namespace.c:702)
[  229.139723]  process_one_work (kernel/workqueue.c:3314)
[  229.139751]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[  229.139774]  ? rescuer_thread (kernel/workqueue.c:3672)
[  229.139796]  kthread (kernel/kthread.c:436)
[  229.139819]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[  229.139840]  ret_from_fork (arch/x86/kernel/process.c:158)
[  229.139861]  ? 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