======================================
| xx__-> [  502.374201] ------------[ cut here ]------------
| [  502.374293] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/645
| [  502.374385] Modules linked in:
| [  502.374537] Tainted: [W]=WARN
[  502.374592] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  502.374662] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  502.374726] 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
[  502.374873] RSP: 0018:ff77a99b809c7cc8 EFLAGS: 00010286
[  502.374938] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  502.375016] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81926d00
[  502.375097] RBP: 0000000000000000 R08: ff2556dc82b92310 R09: ff2556dc86a9a02c
[  502.375174] R10: ff2556dc81130118 R11: fefefefefefefeff R12: 0000000000000000
[  502.375252] R13: 0000000000000010 R14: ff2556dc81130000 R15: ff2556dc81926d00
[  502.375334] FS:  00007f3fce8ea740(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  502.375413] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  502.375482] CR2: 0000557e2982b008 CR3: 0000000002b8f005 CR4: 0000000000771ef0
[  502.375561] PKRU: 55555554
[  502.375609] Call Trace:
[  502.375659]  <TASK>
[  502.375709]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  502.375766]  register_netdevice (net/core/dev.c:11488)
[  502.375831]  register_netdev (net/core/dev.c:11552)
[  502.375888]  loopback_net_init (drivers/net/loopback.c:218)
[  502.375948]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[  502.376021]  ops_init (net/core/net_namespace.c:137)
[  502.376085]  setup_net (net/core/net_namespace.c:446)
[  502.376143]  copy_net_ns (net/core/net_namespace.c:579)
[  502.376202]  create_new_namespaces (kernel/nsproxy.c:132)
[  502.376283]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[  502.376348]  ksys_unshare (kernel/fork.c:3243)
[  502.376408]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[  502.376464]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  502.376523]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  502.376588] RIP: 0033:0x7f3fce9e5bcb
[  502.376645] 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
[  502.376779] RSP: 002b:00007ffc7bedb878 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  502.376863] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3fce9e5bcb
[  502.376941] RDX: 0000000000000000 RSI: 00007ffc7bedb5e0 RDI: 0000000040000000
[  502.377018] RBP: 00007ffc7bedbc00 R08: 00007ffc7bedb7d0 R09: 0000000000000000
[  502.377104] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  502.377181] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000557df1988b68
| [  502.378004] ------------[ cut here ]------------
| [  502.378076] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/645
| [  502.378164] Modules linked in:
| [  502.378315] Tainted: [W]=WARN
[  502.378370] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  502.378440] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  502.378503] 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
[  502.378637] RSP: 0018:ff77a99b809c7d68 EFLAGS: 00010286
[  502.378701] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  502.378777] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81926d00
[  502.378869] RBP: 0000000000000000 R08: ff2556dc82b9fa10 R09: ff2556dc86a9b030
[  502.378946] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  502.379022] R13: 0000000000000010 R14: ff2556dc8322c000 R15: ff2556dc81926d00
[  502.379112] FS:  0000000003975400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  502.379191] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  502.379263] CR2: 00007ff7bdc3b000 CR3: 0000000009eb3006 CR4: 0000000000771ef0
[  502.379341] PKRU: 55555554
[  502.379390] Call Trace:
[  502.379438]  <TASK>
[  502.379488]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  502.379545]  register_netdevice (net/core/dev.c:11488)
[  502.379601]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[  502.379661]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[  502.379720]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  502.379779]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  502.379841]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  502.379906] RIP: 0033:0x47cc8d
[  502.379962] 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 
[  502.380097] RSP: 002b:00007ffddfe87440 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  502.380176] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  502.380253] RDX: 00007ffddfe874c0 RSI: 00000000400454ca RDI: 0000000000000005
[  502.380330] RBP: 00007ffddfe87490 R08: 0000000000000000 R09: 0000000000000000
[  502.380406] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddfe87998
[  502.380482] R13: 00007ffddfe87a18 R14: 0000000000000002 R15: 0000000000543540
| [  502.380689] ------------[ cut here ]------------
| [  502.380752] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/645
| [  502.380843] Modules linked in:
| [  502.380990] Tainted: [W]=WARN
[  502.381045] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  502.381118] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  502.381181] 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
[  502.381312] RSP: 0018:ff77a99b809c7d60 EFLAGS: 00010286
[  502.381376] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  502.381453] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81926d00
[  502.381529] RBP: 0000000000000002 R08: ff2556dc82b9fa10 R09: ff2556dc86a9b030
[  502.381606] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  502.381682] R13: 0000000000000010 R14: ff2556dc8322c000 R15: ff2556dc81926d00
[  502.381761] FS:  0000000003975400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  502.381842] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  502.381914] CR2: 00007ff7bdc3b000 CR3: 0000000009eb3006 CR4: 0000000000771ef0
[  502.381992] PKRU: 55555554
[  502.382040] Call Trace:
[  502.382095]  <TASK>
[  502.382172]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[  502.382231]  notifier_call_chain (kernel/notifier.c:85)
[  502.382289]  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)
[  502.382355]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[  502.382412]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[  502.382471]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  502.382528]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  502.382586]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  502.382654] RIP: 0033:0x47cc8d
[  502.382709] 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 
[  502.382847] RSP: 002b:00007ffddfe87480 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  502.382924] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  502.383001] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  502.383084] RBP: 00007ffddfe874d0 R08: 0000000000000000 R09: 0000000000000000
[  502.383161] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddfe87998
[  502.383237] R13: 00007ffddfe87a18 R14: 0000000000000002 R15: 0000000000543540
| [  502.383446] ------------[ cut here ]------------
| [  502.383509] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/645
| [  502.383594] Modules linked in:
| [  502.383741] Tainted: [W]=WARN
[  502.383807] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  502.383876] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  502.383939] 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
[  502.384079] RSP: 0018:ff77a99b809c7c10 EFLAGS: 00010286
[  502.384143] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  502.384220] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81926d00
[  502.384297] RBP: 0000000000000000 R08: ff2556dc82b9fa10 R09: ff2556dc86a98030
[  502.384375] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  502.384452] R13: 0000000000000010 R14: ff2556dc8322c000 R15: ff2556dc81926d00
[  502.384532] FS:  0000000003975400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  502.384610] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  502.384679] CR2: 00007ff7bdc3b000 CR3: 0000000009eb3006 CR4: 0000000000771ef0
[  502.384757] PKRU: 55555554
[  502.384810] Call Trace:
[  502.384858]  <TASK>
[  502.384908]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  502.384965]  __dev_notify_flags (net/core/dev.c:9787)
[  502.385022]  netif_change_flags (net/core/dev.c:9820)
[  502.385085]  dev_change_flags (net/core/dev_api.c:68)
[  502.385142]  devinet_ioctl (net/ipv4/devinet.c:1199)
[  502.385201]  inet_ioctl (net/ipv4/af_inet.c:1011)
[  502.385260]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[  502.385317]  sock_do_ioctl (net/socket.c:1313)
[  502.385376]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  502.385433]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  502.385490]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  502.385554] RIP: 0033:0x47cc8d
[  502.385610] 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 
[  502.385744] RSP: 002b:00007ffddfe87460 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  502.385829] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  502.385906] RDX: 00007ffddfe874d0 RSI: 0000000000008914 RDI: 0000000000000006
[  502.385982] RBP: 00007ffddfe874b0 R08: 0000000000000000 R09: 0000000000000000
[  502.386061] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddfe87998
[  502.386144] R13: 00007ffddfe87a18 R14: 0000000000000002 R15: 0000000000543540
| [  547.360742] ------------[ cut here ]------------
| [  547.360896] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/645
| [  547.360990] Modules linked in:
| [  547.361142] Tainted: [W]=WARN
[  547.361198] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.361283] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  547.361348] 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
[  547.361483] RSP: 0018:ff77a99b809c7b58 EFLAGS: 00010286
[  547.361548] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  547.361626] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1500
[  547.361703] RBP: 0000000000000000 R08: ff2556dc82b9fa10 R09: ff2556dc86ad7030
[  547.361780] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  547.361864] R13: 0000000000000010 R14: ff2556dc8322c000 R15: ff2556dc818e1500
[  547.361947] FS:  0000000000000000(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  547.362027] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.362097] CR2: 00007ff7bdc3b000 CR3: 0000000004a42001 CR4: 0000000000771ef0
[  547.362178] PKRU: 55555554
[  547.362227] Call Trace:
[  547.362283]  <TASK>
[  547.362333]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  547.362391]  netif_close_many (net/core/dev.c:1804)
[  547.362451]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[  547.362517]  ? __queue_work (kernel/workqueue.c:2401)
[  547.362577]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  547.362641]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  547.362702]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  547.362759]  __fput (fs/file_table.c:510)
[  547.362826]  task_work_run (kernel/task_work.c:233)
[  547.362884]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  547.362943]  ? 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))
[  547.363013]  do_group_exit (kernel/exit.c:1119)
[  547.363095]  get_signal (kernel/signal.c:3037)
[  547.363155]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  547.363250]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  547.363352]  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)
[  547.363410]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  547.363477] RIP: 0033:0x4c2d9e
[  547.363536] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[  547.363607] RSP: 002b:00007ffddfe86df0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  547.363686] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  547.363763] RDX: 0000000000000014 RSI: 00007ffddfe86ed0 RDI: 0000000000000007
[  547.363875] RBP: 00007ffddfe86e00 R08: 00007ffddfe86e90 R09: 000000000000000c
[  547.363952] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffddfe87998
[  547.364029] R13: 00007ffddfe87a18 R14: 00007ffddfe86fc0 R15: 0000000000543540
| [  547.364316] ------------[ cut here ]------------
| [  547.364354] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/645
| [  547.364409] Modules linked in:
| [  547.364494] Tainted: [W]=WARN
[  547.364516] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.364555] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  547.364587] 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
[  547.364693] RSP: 0018:ff77a99b809c7bc8 EFLAGS: 00010286
[  547.364725] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  547.364774] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e5f00
[  547.364821] RBP: 0000000000000000 R08: ff2556dc82b9fa10 R09: ff2556dc88e15030
[  547.364865] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  547.364905] R13: 0000000000000011 R14: ff2556dc8322c000 R15: ff2556dc818e5f00
[  547.364951] FS:  0000000000000000(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  547.364996] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.365032] CR2: 00007f46eb825f98 CR3: 0000000004a42002 CR4: 0000000000771ef0
[  547.365073] PKRU: 55555554
[  547.365089] Call Trace:
[  547.365105]  <TASK>
[  547.365119]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  547.365151]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  547.365179]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  547.365203]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  547.365226]  __fput (fs/file_table.c:510)
[  547.365249]  task_work_run (kernel/task_work.c:233)
[  547.365276]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  547.365300]  ? 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))
[  547.365325]  do_group_exit (kernel/exit.c:1119)
[  547.365349]  get_signal (kernel/signal.c:3037)
[  547.365373]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  547.365404]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  547.365436]  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)
[  547.365460]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  547.365488] RIP: 0033:0x4c2d9e
[  547.365512] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[  547.365544] RSP: 002b:00007ffddfe86df0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  547.365589] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  547.365629] RDX: 0000000000000014 RSI: 00007ffddfe86ed0 RDI: 0000000000000007
[  547.365674] RBP: 00007ffddfe86e00 R08: 00007ffddfe86e90 R09: 000000000000000c
[  547.365719] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffddfe87998
[  547.365760] R13: 00007ffddfe87a18 R14: 00007ffddfe86fc0 R15: 0000000000543540
| [  547.376107] ------------[ cut here ]------------
| [  547.376150] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: 1/64
| [  547.376209] Modules linked in:
| [  547.376301] Tainted: [W]=WARN
[  547.376325] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.376365] Workqueue: netns cleanup_net
[  547.376391] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  547.376421] 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
[  547.376518] RSP: 0018:ff77a99b80237c78 EFLAGS: 00010286
[  547.376547] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  547.376589] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1600
[  547.376632] RBP: 0000000000000000 R08: ff2556dc82b92310 R09: ff2556dc8692d82c
[  547.376678] R10: ff2556dc81130118 R11: fefefefefefefeff R12: 0000000000000000
[  547.376723] R13: 0000000000000011 R14: ff2556dc81130000 R15: ff2556dc818e1600
[  547.376765] FS:  0000000000000000(0000) GS:ff2556dd07f16000(0000) knlGS:0000000000000000
[  547.376815] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.376856] CR2: 00007f46eb807680 CR3: 0000000004a42002 CR4: 0000000000771ef0
[  547.376899] PKRU: 55555554
[  547.376915] Call Trace:
[  547.376928]  <TASK>
[  547.376945]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  547.376973]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[  547.376998]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[  547.377020]  cleanup_net (net/core/net_namespace.c:702)
[  547.377044]  process_one_work (kernel/workqueue.c:3314)
[  547.377071]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[  547.377094]  ? rescuer_thread (kernel/workqueue.c:3672)
[  547.377115]  kthread (kernel/kthread.c:436)
[  547.377138]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[  547.377158]  ret_from_fork (arch/x86/kernel/process.c:158)
[  547.377181]  ? 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