======================================
| xx__-> [  320.443686] ------------[ cut here ]------------
| [  320.443767] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/468
| [  320.443854] Modules linked in:
| [  320.444011] Tainted: [W]=WARN
[  320.444071] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.444139] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  320.444202] 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
[  320.444349] RSP: 0018:ff60724180777cc8 EFLAGS: 00010286
[  320.444413] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.444489] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600310fc00
[  320.444565] RBP: 0000000000000000 R08: ff29a26001f00bd0 R09: ff29a26002fdd02c
[  320.444640] R10: ff29a260032db118 R11: fefefefefefefeff R12: 0000000000000000
[  320.444716] R13: 0000000000000010 R14: ff29a260032db000 R15: ff29a2600310fc00
[  320.444796] FS:  00007f06eebf6740(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[  320.444874] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.444944] CR2: 000055eed94b0008 CR3: 00000000030b3006 CR4: 0000000000771ef0
[  320.445028] PKRU: 55555554
[  320.445074] Call Trace:
[  320.445122]  <TASK>
[  320.445170]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  320.445227]  register_netdevice (net/core/dev.c:11488)
[  320.445290]  register_netdev (net/core/dev.c:11552)
[  320.445348]  loopback_net_init (drivers/net/loopback.c:218)
[  320.445407]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[  320.445471]  ops_init (net/core/net_namespace.c:137)
[  320.445529]  setup_net (net/core/net_namespace.c:446)
[  320.445586]  copy_net_ns (net/core/net_namespace.c:579)
[  320.445643]  create_new_namespaces (kernel/nsproxy.c:132)
[  320.445708]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[  320.445772]  ksys_unshare (kernel/fork.c:3243)
[  320.445830]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[  320.445887]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  320.445944]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  320.446012] RIP: 0033:0x7f06eecf1bcb
[  320.446069] 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
[  320.446198] RSP: 002b:00007ffcabd28c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  320.446283] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f06eecf1bcb
[  320.446361] RDX: 0000000000000000 RSI: 00007ffcabd289a0 RDI: 0000000040000000
[  320.446438] RBP: 00007ffcabd28fc0 R08: 00007ffcabd28b90 R09: 0000000000000000
[  320.446517] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  320.446591] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055eecc51eb68
| [  320.447422] ------------[ cut here ]------------
| [  320.447485] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/468
| [  320.447572] Modules linked in:
| [  320.447718] Tainted: [W]=WARN
[  320.447772] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.447841] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  320.447904] 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
[  320.448052] RSP: 0018:ff60724180777d68 EFLAGS: 00010286
[  320.448115] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.448190] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600310fc00
[  320.448267] RBP: 0000000000000000 R08: ff29a26002fa8090 R09: ff29a26006be9030
[  320.448395] R10: ff29a26004cc0118 R11: fefefefefefefeff R12: 0000000000000000
[  320.448471] R13: 0000000000000010 R14: ff29a26004cc0000 R15: ff29a2600310fc00
[  320.448552] FS:  000000002b276400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[  320.448629] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.448697] CR2: 00007fb7412ae000 CR3: 0000000002fb1001 CR4: 0000000000771ef0
[  320.448775] PKRU: 55555554
[  320.448822] Call Trace:
[  320.448870]  <TASK>
[  320.448917]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  320.448981]  register_netdevice (net/core/dev.c:11488)
[  320.449036]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[  320.449093]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[  320.449150]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  320.449208]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  320.449265]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  320.449336] RIP: 0033:0x47cc8d
[  320.449393] 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 
[  320.449526] RSP: 002b:00007fffe94537f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.449601] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.449677] RDX: 00007fffe9453870 RSI: 00000000400454ca RDI: 0000000000000005
[  320.449753] RBP: 00007fffe9453840 R08: 0000000000000000 R09: 0000000000000000
[  320.449829] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe9453d48
[  320.449906] R13: 00007fffe9453dc8 R14: 0000000000000002 R15: 0000000000543540
| [  320.450116] ------------[ cut here ]------------
| [  320.450177] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/468
| [  320.450263] Modules linked in:
| [  320.450415] Tainted: [W]=WARN
[  320.450469] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.450538] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  320.450601] 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
[  320.450733] RSP: 0018:ff60724180777d60 EFLAGS: 00010286
[  320.450795] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  320.450870] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600310fc00
[  320.450945] RBP: 0000000000000002 R08: ff29a26002fa8090 R09: ff29a26006be9030
[  320.451026] R10: ff29a26004cc0118 R11: fefefefefefefeff R12: 0000000000000000
[  320.451106] R13: 0000000000000010 R14: ff29a26004cc0000 R15: ff29a2600310fc00
[  320.451189] FS:  000000002b276400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[  320.451268] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.451346] CR2: 00007fb7412ae000 CR3: 0000000002fb1001 CR4: 0000000000771ef0
[  320.451424] PKRU: 55555554
[  320.451471] Call Trace:
[  320.451519]  <TASK>
[  320.451566]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[  320.451623]  notifier_call_chain (kernel/notifier.c:85)
[  320.451679]  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)
[  320.451743]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[  320.451800]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[  320.451857]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  320.451913]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  320.451976]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  320.452040] RIP: 0033:0x47cc8d
[  320.452095] 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 
[  320.452225] RSP: 002b:00007fffe9453830 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.452309] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.452388] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  320.452466] RBP: 00007fffe9453880 R08: 0000000000000000 R09: 0000000000000000
[  320.452542] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe9453d48
[  320.452617] R13: 00007fffe9453dc8 R14: 0000000000000002 R15: 0000000000543540
| [  320.452820] ------------[ cut here ]------------
| [  320.452882] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/468
| [  320.452975] Modules linked in:
| [  320.453123] Tainted: [W]=WARN
[  320.453177] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.453246] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  320.453317] 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
[  320.453450] RSP: 0018:ff60724180777c10 EFLAGS: 00010286
[  320.453512] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  320.453589] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600310fc00
[  320.453665] RBP: 0000000000000000 R08: ff29a26002fa8090 R09: ff29a26002d27030
[  320.453741] R10: ff29a26004cc0118 R11: fefefefefefefeff R12: 0000000000000000
[  320.453819] R13: 0000000000000010 R14: ff29a26004cc0000 R15: ff29a2600310fc00
[  320.453897] FS:  000000002b276400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[  320.453981] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.454050] CR2: 00007fb7412ae000 CR3: 0000000002fb1001 CR4: 0000000000771ef0
[  320.454130] PKRU: 55555554
[  320.454177] Call Trace:
[  320.454225]  <TASK>
[  320.454281]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  320.454337]  __dev_notify_flags (net/core/dev.c:9787)
[  320.454395]  netif_change_flags (net/core/dev.c:9820)
[  320.454452]  dev_change_flags (net/core/dev_api.c:68)
[  320.454509]  devinet_ioctl (net/ipv4/devinet.c:1199)
[  320.454568]  inet_ioctl (net/ipv4/af_inet.c:1011)
[  320.454625]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[  320.454682]  sock_do_ioctl (net/socket.c:1313)
[  320.454740]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  320.454797]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  320.454854]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  320.454918] RIP: 0033:0x47cc8d
[  320.454980] 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 
[  320.455114] RSP: 002b:00007fffe9453810 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.455192] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.455267] RDX: 00007fffe9453880 RSI: 0000000000008914 RDI: 0000000000000006
[  320.455352] RBP: 00007fffe9453860 R08: 0000000000000000 R09: 0000000000000000
[  320.455429] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe9453d48
[  320.455505] R13: 00007fffe9453dc8 R14: 0000000000000002 R15: 0000000000543540
| [  365.428670] ------------[ cut here ]------------
| [  365.428787] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/468
| [  365.428918] Modules linked in:
| [  365.429091] Tainted: [W]=WARN
[  365.429146] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.429220] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  365.429284] 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
[  365.429452] RSP: 0018:ff60724180777b58 EFLAGS: 00010286
[  365.429516] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  365.429593] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600310dd00
[  365.429670] RBP: 0000000000000000 R08: ff29a26002fa8090 R09: ff29a26002d27030
[  365.429747] R10: ff29a26004cc0118 R11: fefefefefefefeff R12: 0000000000000000
[  365.429824] R13: 0000000000000010 R14: ff29a26004cc0000 R15: ff29a2600310dd00
[  365.429905] FS:  0000000000000000(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[  365.430164] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.430238] CR2: 00007fb7412ae000 CR3: 000000001a642002 CR4: 0000000000771ef0
[  365.430315] PKRU: 55555554
[  365.430367] Call Trace:
[  365.430424]  <TASK>
[  365.430473]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  365.430530]  netif_close_many (net/core/dev.c:1804)
[  365.430590]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[  365.430655]  ? __queue_work (kernel/workqueue.c:2401)
[  365.430714]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  365.430778]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  365.430839]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  365.430896]  __fput (fs/file_table.c:510)
[  365.430956]  task_work_run (kernel/task_work.c:233)
[  365.431018]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  365.431076]  do_group_exit (kernel/exit.c:1119)
[  365.431133]  get_signal (kernel/signal.c:3037)
[  365.431192]  ? __d_alloc (fs/dcache.c:1807 (discriminator 11))
[  365.431250]  ? alloc_empty_file (fs/file_table.c:262 (discriminator 11))
[  365.431307]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  365.431377]  ? alloc_file_pseudo (fs/file_table.c:398 fs/file_table.c:425)
[  365.431443]  ? __sys_socket (net/socket.c:575 net/socket.c:1815)
[  365.431502]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  365.431568]  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)
[  365.431628]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  365.431692] RIP: 0033:0x47ea2b
[  365.431749] Code: Unable to access opcode bytes at 0x47ea01.

Code starting with the faulting instruction
===========================================
[  365.431817] RSP: 002b:00007fffe9453298 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
[  365.431892] RAX: 0000000000000007 RBX: 00007fffe9453370 RCX: 000000000047ea2b
[  365.431976] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  365.432050] RBP: 00007fffe94532d0 R08: 0000000000000041 R09: 000000002b2773e0
[  365.432126] R10: 0000000000000040 R11: 0000000000000206 R12: 00007fffe9453d48
[  365.432203] R13: 00007fffe9453dc8 R14: 00007fffe9453848 R15: 0000000000543540
| [  365.432481] ------------[ cut here ]------------
| [  365.432515] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/468
| [  365.432568] Modules linked in:
| [  365.432650] Tainted: [W]=WARN
[  365.432670] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.432706] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  365.432732] 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
[  365.432835] RSP: 0018:ff60724180777bc8 EFLAGS: 00010286
[  365.432863] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  365.432907] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003080c00
[  365.432952] RBP: 0000000000000000 R08: ff29a26002fa8090 R09: ff29a260076d1030
[  365.432998] R10: ff29a26004cc0118 R11: fefefefefefefeff R12: 0000000000000000
[  365.433032] R13: 0000000000000011 R14: ff29a26004cc0000 R15: ff29a26003080c00
[  365.433076] FS:  0000000000000000(0000) GS:ff29a26083a16000(0000) knlGS:0000000000000000
[  365.433122] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.433158] CR2: 00007fa645310680 CR3: 000000001a642001 CR4: 0000000000771ef0
[  365.433202] PKRU: 55555554
[  365.433218] Call Trace:
[  365.433232]  <TASK>
[  365.433245]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  365.433274]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[  365.433305]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[  365.433330]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[  365.433357]  __fput (fs/file_table.c:510)
[  365.433387]  task_work_run (kernel/task_work.c:233)
[  365.433410]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[  365.433432]  do_group_exit (kernel/exit.c:1119)
[  365.433450]  get_signal (kernel/signal.c:3037)
[  365.433474]  ? __d_alloc (fs/dcache.c:1807 (discriminator 11))
[  365.433497]  ? alloc_empty_file (fs/file_table.c:262 (discriminator 11))
[  365.433518]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[  365.433547]  ? alloc_file_pseudo (fs/file_table.c:398 fs/file_table.c:425)
[  365.433575]  ? __sys_socket (net/socket.c:575 net/socket.c:1815)
[  365.433602]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[  365.433633]  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)
[  365.433653]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  365.433682] RIP: 0033:0x47ea2b
[  365.433703] Code: Unable to access opcode bytes at 0x47ea01.

Code starting with the faulting instruction
===========================================
[  365.433738] RSP: 002b:00007fffe9453298 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
[  365.433779] RAX: 0000000000000007 RBX: 00007fffe9453370 RCX: 000000000047ea2b
[  365.433821] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  365.433863] RBP: 00007fffe94532d0 R08: 0000000000000041 R09: 000000002b2773e0
[  365.433906] R10: 0000000000000040 R11: 0000000000000206 R12: 00007fffe9453d48
[  365.433946] R13: 00007fffe9453dc8 R14: 00007fffe9453848 R15: 0000000000543540
| [  365.443065] ------------[ cut here ]------------
| [  365.443115] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 1/64
| [  365.443177] Modules linked in:
| [  365.443254] Tainted: [W]=WARN
[  365.443278] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.443315] Workqueue: netns cleanup_net
[  365.443339] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  365.443372] 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
[  365.443480] RSP: 0018:ff60724180237c78 EFLAGS: 00010286
[  365.443508] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  365.443550] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600310de00
[  365.443594] RBP: 0000000000000000 R08: ff29a26001f00bd0 R09: ff29a260060bf82c
[  365.443634] R10: ff29a260032db118 R11: fefefefefefefeff R12: 0000000000000000
[  365.443676] R13: 0000000000000011 R14: ff29a260032db000 R15: ff29a2600310de00
[  365.443731] FS:  0000000000000000(0000) GS:ff29a26083896000(0000) knlGS:0000000000000000
[  365.443778] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.443814] CR2: 0000561bed0aa2b8 CR3: 0000000002e8d005 CR4: 0000000000771ef0
[  365.443858] PKRU: 55555554
[  365.443872] Call Trace:
[  365.443887]  <TASK>
[  365.443902]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[  365.443931]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[  365.443959]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[  365.443988]  cleanup_net (net/core/net_namespace.c:702)
[  365.444012]  process_one_work (kernel/workqueue.c:3314)
[  365.444033]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[  365.444055]  ? rescuer_thread (kernel/workqueue.c:3672)
[  365.444079]  kthread (kernel/kthread.c:436)
[  365.444101]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[  365.444122]  ret_from_fork (arch/x86/kernel/process.c:158)
[  365.444146]  ? 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