======================================
| xx__-> [    2.325804] ------------[ cut here ]------------
| [    2.325922] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/158
| [    2.326007] Modules linked in:
| [    2.326162] Tainted: [W]=WARN
[    2.326244] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.326318] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.326397] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.326570] RSP: 0018:ff4c597e8040fcc8 EFLAGS: 00010286
[    2.326668] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.326794] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917500
[    2.326871] RBP: 0000000000000000 R08: ff18ef5941de3690 R09: ff18ef59437fa02c
[    2.326959] R10: ff18ef594343d118 R11: fefefefefefefeff R12: 0000000000000000
[    2.327036] R13: 0000000000000010 R14: ff18ef594343d000 R15: ff18ef5941917500
[    2.327116] FS:  00007fe989a89740(0000) GS:ff18ef59e7f96000(0000) knlGS:0000000000000000
[    2.327207] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.327279] CR2: 000055c684e96310 CR3: 000000000366b003 CR4: 0000000000771ef0
[    2.327356] PKRU: 55555554
[    2.327415] Call Trace:
[    2.327467]  <TASK>
[    2.327519]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.327580]  register_netdevice (net/core/dev.c:11488)
[    2.327643]  register_netdev (net/core/dev.c:11552)
[    2.327705]  loopback_net_init (drivers/net/loopback.c:218)
[    2.327769]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.327837]  ops_init (net/core/net_namespace.c:137)
[    2.327901]  setup_net (net/core/net_namespace.c:446)
[    2.327963]  copy_net_ns (net/core/net_namespace.c:579)
[    2.328024]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.328095]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.328161]  ksys_unshare (kernel/fork.c:3243)
[    2.328235]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.328297]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.328367]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.328436] RIP: 0033:0x7fe989b84bcb
[    2.328497] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 2d 82 0f 00 	mov    0xf822d(%rip),%rcx        # 0xf8237
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf8237
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d fd 81 0f 00 	mov    0xf81fd(%rip),%rcx        # 0xf820d
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[    2.328615] RSP: 002b:00007ffdf5a88f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.328696] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe989b84bcb
[    2.328773] RDX: 0000000000000000 RSI: 00007ffdf5a88ca0 RDI: 0000000040000000
[    2.328853] RBP: 00007ffdf5a892c0 R08: 00007ffdf5a88e90 R09: 0000000000000000
[    2.328962] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.329046] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055c684e99b68
| [    2.332528] ------------[ cut here ]------------
| [    2.332589] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
| [    2.332678] Modules linked in:
| [    2.332825] Tainted: [W]=WARN
[    2.332883] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.332954] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.333022] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.333145] RSP: 0018:ff4c597e8040fd68 EFLAGS: 00010286
[    2.333216] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.333296] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917500
[    2.333382] RBP: 0000000000000000 R08: ff18ef594324e510 R09: ff18ef59437ff030
[    2.333460] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[    2.333538] R13: 0000000000000010 R14: ff18ef5943704000 R15: ff18ef5941917500
[    2.333616] FS:  000000002aee6400(0000) GS:ff18ef59e7f96000(0000) knlGS:0000000000000000
[    2.333696] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.333767] CR2: 00007f87e81a7000 CR3: 0000000001980004 CR4: 0000000000771ef0
[    2.333847] PKRU: 55555554
[    2.333898] Call Trace:
[    2.333950]  <TASK>
[    2.334001]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.334062]  register_netdevice (net/core/dev.c:11488)
[    2.334122]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.334191]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.334255]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.334319]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.334386]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.334455] RIP: 0033:0x47cc8d
[    2.334516] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    2.334641] RSP: 002b:00007ffc0dd7faf0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.334719] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.334798] RDX: 00007ffc0dd7fb70 RSI: 00000000400454ca RDI: 0000000000000005
[    2.334875] RBP: 00007ffc0dd7fb40 R08: 0000000000000000 R09: 0000000000000000
[    2.334954] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc0dd80048
[    2.335035] R13: 00007ffc0dd800c8 R14: 0000000000000002 R15: 0000000000543540
| [    2.335260] ------------[ cut here ]------------
| [    2.335325] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
| [    2.335409] Modules linked in:
| [    2.335557] Tainted: [W]=WARN
[    2.335612] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.335685] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.335748] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.335874] RSP: 0018:ff4c597e8040fd60 EFLAGS: 00010286
[    2.335941] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.336013] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917500
[    2.336095] RBP: 0000000000000002 R08: ff18ef594324e510 R09: ff18ef59437ff030
[    2.336178] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[    2.336259] R13: 0000000000000010 R14: ff18ef5943704000 R15: ff18ef5941917500
[    2.336339] FS:  000000002aee6400(0000) GS:ff18ef59e7f96000(0000) knlGS:0000000000000000
[    2.336422] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.336493] CR2: 00007f87e81a7000 CR3: 0000000001980004 CR4: 0000000000771ef0
[    2.336572] PKRU: 55555554
[    2.336623] Call Trace:
[    2.336674]  <TASK>
[    2.336726]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.336787]  notifier_call_chain (kernel/notifier.c:85)
[    2.336850]  netdev_update_features (net/core/dev.c:2287 net/core/dev.c:2301 net/core/dev.c:1590 net/core/dev.c:11099 net/core/dev.c:11096)
[    2.336917]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.336979]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.337040]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.337101]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.337163]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.337239] RIP: 0033:0x47cc8d
[    2.337300] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    2.337432] RSP: 002b:00007ffc0dd7fb30 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.337512] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.337589] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.337667] RBP: 00007ffc0dd7fb80 R08: 0000000000000000 R09: 0000000000000000
[    2.337747] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc0dd80048
[    2.337827] R13: 00007ffc0dd800c8 R14: 0000000000000002 R15: 0000000000543540
| [    2.338040] ------------[ cut here ]------------
| [    2.338104] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
| [    2.338197] Modules linked in:
| [    2.338347] Tainted: [W]=WARN
[    2.338409] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.338478] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.338550] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[    2.338669] RSP: 0018:ff4c597e8040fc10 EFLAGS: 00010286
[    2.338737] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.338814] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917500
[    2.338892] RBP: 0000000000000000 R08: ff18ef594324e510 R09: ff18ef59437fc030
[    2.338970] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[    2.339050] R13: 0000000000000010 R14: ff18ef5943704000 R15: ff18ef5941917500
[    2.339132] FS:  000000002aee6400(0000) GS:ff18ef59e7f96000(0000) knlGS:0000000000000000
[    2.339216] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.339289] CR2: 00007f87e81a7000 CR3: 0000000001980004 CR4: 0000000000771ef0
[    2.339375] PKRU: 55555554
[    2.339427] Call Trace:
[    2.339478]  <TASK>
[    2.339529]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.339587]  __dev_notify_flags (net/core/dev.c:9787)
[    2.339649]  netif_change_flags (net/core/dev.c:9820)
[    2.339712]  dev_change_flags (net/core/dev_api.c:68)
[    2.339773]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.339838]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.339901]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.339963]  sock_do_ioctl (net/socket.c:1313)
[    2.340027]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.340090]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.340153]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.340224] RIP: 0033:0x47cc8d
[    2.340283] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
All code
========
   0:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
   a:	31 c0                	xor    %eax,%eax
   c:	48 8d 45 10          	lea    0x10(%rbp),%rax
  10:	c7 45 b0 10 00 00 00 	movl   $0x10,-0x50(%rbp)
  17:	48 89 45 b8          	mov    %rax,-0x48(%rbp)
  1b:	48 8d 45 d0          	lea    -0x30(%rbp),%rax
  1f:	48 89 45 c0          	mov    %rax,-0x40(%rbp)
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  31:	77 1a                	ja     0x4d
  33:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  37:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  3e:	00 00 

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   7:	77 1a                	ja     0x23
   9:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
   d:	64 48 2b 04 25 28 00 	sub    %fs:0x28,%rax
  14:	00 00 
[    2.340416] RSP: 002b:00007ffc0dd7fb10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.340488] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.340569] RDX: 00007ffc0dd7fb80 RSI: 0000000000008914 RDI: 0000000000000006
[    2.340647] RBP: 00007ffc0dd7fb60 R08: 0000000000000000 R09: 0000000000000000
[    2.340725] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc0dd80048
[    2.340802] R13: 00007ffc0dd800c8 R14: 0000000000000002 R15: 0000000000543540
| [   47.307699] ------------[ cut here ]------------
| [   47.307788] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/158
| [   47.307856] Modules linked in:
| [   47.307948] Tainted: [W]=WARN
[   47.307969] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.308005] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.308040] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.308134] RSP: 0018:ff4c597e8040fb58 EFLAGS: 00010286
[   47.308164] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.308214] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917600
[   47.308262] RBP: 0000000000000000 R08: ff18ef594324e510 R09: ff18ef5941c9b030
[   47.308315] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[   47.308364] R13: 0000000000000010 R14: ff18ef5943704000 R15: ff18ef5941917600
[   47.308412] FS:  0000000000000000(0000) GS:ff18ef59e8016000(0000) knlGS:0000000000000000
[   47.308459] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.308497] CR2: 0000561b6d5492a0 CR3: 0000000028c42003 CR4: 0000000000771ef0
[   47.308540] PKRU: 55555554
[   47.308553] Call Trace:
[   47.308572]  <TASK>
[   47.308587]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.308610]  netif_close_many (net/core/dev.c:1804)
[   47.308641]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.308672]  ? __queue_work (kernel/workqueue.c:2401)
[   47.308696]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.308724]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.308748]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.308771]  __fput (fs/file_table.c:510)
[   47.308796]  task_work_run (kernel/task_work.c:233)
[   47.308818]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.308846]  ? 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))
[   47.308879]  do_group_exit (kernel/exit.c:1119)
[   47.308899]  get_signal (kernel/signal.c:3037)
[   47.308919]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.308951]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.308983]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   47.309006]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.309032] RIP: 0033:0x4c2d9e
[   47.309056] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.309090] RSP: 002b:00007ffc0dd7f4a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.309134] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.309175] RDX: 0000000000000014 RSI: 00007ffc0dd7f580 RDI: 0000000000000007
[   47.309216] RBP: 00007ffc0dd7f4b0 R08: 00007ffc0dd7f540 R09: 000000000000000c
[   47.309258] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc0dd80048
[   47.309300] R13: 00007ffc0dd800c8 R14: 00007ffc0dd7f670 R15: 0000000000543540
| [   47.309679] ------------[ cut here ]------------
| [   47.309736] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/158
| [   47.309786] Modules linked in:
| [   47.309866] Tainted: [W]=WARN
[   47.309885] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.309921] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.309955] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.310040] RSP: 0018:ff4c597e8040fbc8 EFLAGS: 00010286
[   47.310067] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.310108] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917600
[   47.310147] RBP: 0000000000000000 R08: ff18ef594324e510 R09: ff18ef5946003830
[   47.310188] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[   47.310228] R13: 0000000000000011 R14: ff18ef5943704000 R15: ff18ef5941917600
[   47.310272] FS:  0000000000000000(0000) GS:ff18ef59e8016000(0000) knlGS:0000000000000000
[   47.310319] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.310353] CR2: 0000557e871754c0 CR3: 00000000030be006 CR4: 0000000000771ef0
[   47.310399] PKRU: 55555554
[   47.310414] Call Trace:
[   47.310435]  <TASK>
[   47.310451]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.310479]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.310512]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.310534]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.310557]  __fput (fs/file_table.c:510)
[   47.310579]  task_work_run (kernel/task_work.c:233)
[   47.310601]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.310623]  ? 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))
[   47.310650]  do_group_exit (kernel/exit.c:1119)
[   47.310671]  get_signal (kernel/signal.c:3037)
[   47.310693]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.310728]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.310756]  do_syscall_64 (./include/linux/irq-entry-common.h:207 ./include/linux/irq-entry-common.h:230 ./include/linux/entry-common.h:318 arch/x86/entry/syscall_64.c:100)
[   47.310776]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.310803] RIP: 0033:0x4c2d9e
[   47.310824] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.310858] RSP: 002b:00007ffc0dd7f4a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.310897] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.310934] RDX: 0000000000000014 RSI: 00007ffc0dd7f580 RDI: 0000000000000007
[   47.310973] RBP: 00007ffc0dd7f4b0 R08: 00007ffc0dd7f540 R09: 000000000000000c
[   47.311018] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc0dd80048
[   47.311059] R13: 00007ffc0dd800c8 R14: 00007ffc0dd7f670 R15: 0000000000543540
| [   47.318477] ------------[ cut here ]------------
| [   47.318523] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 1/65
| [   47.318584] Modules linked in:
| [   47.318659] Tainted: [W]=WARN
[   47.318679] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.318715] Workqueue: netns cleanup_net
[   47.318740] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.318769] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
All code
========
   0:	80 00 00             	addb   $0x0,(%rax)
   3:	00 e8                	add    %ch,%al
   5:	59                   	pop    %rcx
   6:	d9 ff                	fcos
   8:	ff 48 83             	decl   -0x7d(%rax)
   b:	c4                   	(bad)
   c:	38 85 c0 75 18 48    	cmp    %al,0x481875c0(%rbp)
  12:	83 c4 08             	add    $0x8,%esp
  15:	4c 89 f8             	mov    %r15,%rax
  18:	5b                   	pop    %rbx
  19:	5d                   	pop    %rbp
  1a:	41 5c                	pop    %r12
  1c:	41 5d                	pop    %r13
  1e:	41 5e                	pop    %r14
  20:	41 5f                	pop    %r15
  22:	c3                   	ret
  23:	44 8b 48 08          	mov    0x8(%rax),%r9d
  27:	eb b4                	jmp    0xffffffffffffffdd
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	ba 02 00 00 00       	mov    $0x2,%edx
  32:	4c 89 fe             	mov    %r15,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 76 b2 fb ff       	call   0xfffffffffffbb2b2
  3c:	b9                   	.byte 0xb9
  3d:	a6                   	cmpsb  (%rdi),(%rsi)
  3e:	ff                   	(bad)
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	ba 02 00 00 00       	mov    $0x2,%edx
   8:	4c 89 fe             	mov    %r15,%rsi
   b:	31 ff                	xor    %edi,%edi
   d:	e8 76 b2 fb ff       	call   0xfffffffffffbb288
  12:	b9                   	.byte 0xb9
  13:	a6                   	cmpsb  (%rdi),(%rsi)
  14:	ff                   	(bad)
  15:	ff                   	.byte 0xff
[   47.318858] RSP: 0018:ff4c597e8023fc78 EFLAGS: 00010286
[   47.318886] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.318925] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5942e99400
[   47.318965] RBP: 0000000000000000 R08: ff18ef5941de3690 R09: ff18ef59419be82c
[   47.319004] R10: ff18ef594343d118 R11: fefefefefefefeff R12: 0000000000000000
[   47.319043] R13: 0000000000000011 R14: ff18ef594343d000 R15: ff18ef5942e99400
[   47.319086] FS:  0000000000000000(0000) GS:ff18ef59e7e96000(0000) knlGS:0000000000000000
[   47.319127] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.319161] CR2: 000055ef70af12b8 CR3: 0000000002efb005 CR4: 0000000000771ef0
[   47.319202] PKRU: 55555554
[   47.319216] Call Trace:
[   47.319230]  <TASK>
[   47.319242]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.319272]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.319300]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.319326]  cleanup_net (net/core/net_namespace.c:702)
[   47.319349]  process_one_work (kernel/workqueue.c:3314)
[   47.319377]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.319399]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.319421]  kthread (kernel/kthread.c:436)
[   47.319444]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.319468]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.319490]  ? 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