======================================
| xx__-> [    2.287506] ------------[ cut here ]------------
| [    2.287551] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/159
| [    2.287601] Modules linked in:
| [    2.287690] Tainted: [W]=WARN
[    2.287717] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.287755] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.287788] 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
[    2.287888] RSP: 0018:ff682d88403e7cc8 EFLAGS: 00010286
[    2.287925] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.287969] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2df70e01db4f00
[    2.288013] RBP: 0000000000000000 R08: ff2df70e01932950 R09: ff2df70e04eb202c
[    2.288058] R10: ff2df70e019c5118 R11: fefefefefefefeff R12: 0000000000000000
[    2.288104] R13: 0000000000000010 R14: ff2df70e019c5000 R15: ff2df70e01db4f00
[    2.288159] FS:  00007fb0cec58740(0000) GS:ff2df70e8f016000(0000) knlGS:0000000000000000
[    2.288205] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.288239] CR2: 000055f7acf36310 CR3: 0000000004c69004 CR4: 0000000000771ef0
[    2.288296] PKRU: 55555554
[    2.288310] Call Trace:
[    2.288329]  <TASK>
[    2.288346]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.288367]  register_netdevice (net/core/dev.c:11488)
[    2.288391]  register_netdev (net/core/dev.c:11552)
[    2.288414]  loopback_net_init (drivers/net/loopback.c:218)
[    2.288440]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[    2.288468]  ops_init (net/core/net_namespace.c:137)
[    2.288490]  setup_net (net/core/net_namespace.c:446)
[    2.288511]  copy_net_ns (net/core/net_namespace.c:579)
[    2.288532]  create_new_namespaces (kernel/nsproxy.c:132)
[    2.288563]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[    2.288592]  ksys_unshare (kernel/fork.c:3243)
[    2.288616]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[    2.288638]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.288666]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.288695] RIP: 0033:0x7fb0ced53bcb
[    2.288721] 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
[    2.288819] RSP: 002b:00007fff362099a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.288863] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb0ced53bcb
[    2.288906] RDX: 0000000000000000 RSI: 00007fff36209710 RDI: 0000000040000000
[    2.288949] RBP: 00007fff36209d30 R08: 00007fff36209900 R09: 0000000000000000
[    2.288991] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.289034] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055f7acf39b68
| [    2.292515] ------------[ cut here ]------------
| [    2.292553] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.292609] Modules linked in:
| [    2.292697] Tainted: [W]=WARN
[    2.292720] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.292754] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.292782] 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
[    2.292881] RSP: 0018:ff682d88403e7d68 EFLAGS: 00010286
[    2.292910] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.292957] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2df70e01db4f00
[    2.293001] RBP: 0000000000000000 R08: ff2df70e030e25d0 R09: ff2df70e04eb7030
[    2.293042] R10: ff2df70e03354118 R11: fefefefefefefeff R12: 0000000000000000
[    2.293084] R13: 0000000000000010 R14: ff2df70e03354000 R15: ff2df70e01db4f00
[    2.293127] FS:  000000003faa5400(0000) GS:ff2df70e8f016000(0000) knlGS:0000000000000000
[    2.293180] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.293214] CR2: 00007fd8f07ba000 CR3: 0000000003287005 CR4: 0000000000771ef0
[    2.293265] PKRU: 55555554
[    2.293280] Call Trace:
[    2.293296]  <TASK>
[    2.293313]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.293337]  register_netdevice (net/core/dev.c:11488)
[    2.293355]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[    2.293380]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[    2.293404]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.293423]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.293444]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.293474] RIP: 0033:0x47cc8d
[    2.293496] 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 
[    2.293595] RSP: 002b:00007ffd21ae8e20 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.293637] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.293684] RDX: 00007ffd21ae8ea0 RSI: 00000000400454ca RDI: 0000000000000005
[    2.293727] RBP: 00007ffd21ae8e70 R08: 0000000000000000 R09: 0000000000000000
[    2.293769] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd21ae9378
[    2.293814] R13: 00007ffd21ae93f8 R14: 0000000000000002 R15: 0000000000543540
| [    2.293918] ------------[ cut here ]------------
| [    2.293948] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.293999] Modules linked in:
| [    2.294082] Tainted: [W]=WARN
[    2.294104] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.294140] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.294170] 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
[    2.294266] RSP: 0018:ff682d88403e7d60 EFLAGS: 00010286
[    2.294297] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.294331] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2df70e01db4f00
[    2.294371] RBP: 0000000000000002 R08: ff2df70e030e25d0 R09: ff2df70e04eb7030
[    2.294412] R10: ff2df70e03354118 R11: fefefefefefefeff R12: 0000000000000000
[    2.294452] R13: 0000000000000010 R14: ff2df70e03354000 R15: ff2df70e01db4f00
[    2.294496] FS:  000000003faa5400(0000) GS:ff2df70e8f016000(0000) knlGS:0000000000000000
[    2.294542] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.294577] CR2: 00007fd8f07ba000 CR3: 0000000003287005 CR4: 0000000000771ef0
[    2.294618] PKRU: 55555554
[    2.294632] Call Trace:
[    2.294647]  <TASK>
[    2.294661]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[    2.294683]  notifier_call_chain (kernel/notifier.c:85)
[    2.294707]  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)
[    2.294740]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[    2.294761]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[    2.294784]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.294805]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.294827]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.294854] RIP: 0033:0x47cc8d
[    2.294875] 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 
[    2.294970] RSP: 002b:00007ffd21ae8e60 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.295013] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.295056] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.295099] RBP: 00007ffd21ae8eb0 R08: 0000000000000005 R09: 0000000000000120
[    2.295144] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd21ae9378
[    2.295192] R13: 00007ffd21ae93f8 R14: 0000000000000002 R15: 0000000000543540
| [    2.295294] ------------[ cut here ]------------
| [    2.295320] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [    2.295372] Modules linked in:
| [    2.295459] Tainted: [W]=WARN
[    2.295480] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.295516] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[    2.295545] 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
[    2.295642] RSP: 0018:ff682d88403e7c10 EFLAGS: 00010286
[    2.295671] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.295714] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2df70e01db4f00
[    2.295758] RBP: 0000000000000000 R08: ff2df70e030e25d0 R09: ff2df70e04eb4030
[    2.295799] R10: ff2df70e03354118 R11: fefefefefefefeff R12: 0000000000000000
[    2.295840] R13: 0000000000000010 R14: ff2df70e03354000 R15: ff2df70e01db4f00
[    2.295882] FS:  000000003faa5400(0000) GS:ff2df70e8f016000(0000) knlGS:0000000000000000
[    2.295922] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.295958] CR2: 00007fd8f07ba000 CR3: 0000000003287005 CR4: 0000000000771ef0
[    2.296002] PKRU: 55555554
[    2.296016] Call Trace:
[    2.296029]  <TASK>
[    2.296043]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[    2.296065]  __dev_notify_flags (net/core/dev.c:9787)
[    2.296087]  netif_change_flags (net/core/dev.c:9820)
[    2.296109]  dev_change_flags (net/core/dev_api.c:68)
[    2.296130]  devinet_ioctl (net/ipv4/devinet.c:1199)
[    2.296159]  inet_ioctl (net/ipv4/af_inet.c:1011)
[    2.296181]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[    2.296203]  sock_do_ioctl (net/socket.c:1313)
[    2.296227]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[    2.296255]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[    2.296276]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    2.296302] RIP: 0033:0x47cc8d
[    2.296324] 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 
[    2.296421] RSP: 002b:00007ffd21ae8e40 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.296461] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.296506] RDX: 00007ffd21ae8eb0 RSI: 0000000000008914 RDI: 0000000000000006
[    2.296546] RBP: 00007ffd21ae8e90 R08: 0000000000000005 R09: 0000000000000120
[    2.296588] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd21ae9378
[    2.296628] R13: 00007ffd21ae93f8 R14: 0000000000000002 R15: 0000000000543540
| [   47.270391] ------------[ cut here ]------------
| [   47.270498] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [   47.270576] Modules linked in:
| [   47.270674] Tainted: [W]=WARN
[   47.270702] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.270740] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.270770] 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
[   47.270855] RSP: 0018:ff682d88403e7b58 EFLAGS: 00010286
[   47.270885] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.270928] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2df70e0188f800
[   47.270972] RBP: 0000000000000000 R08: ff2df70e030e25d0 R09: ff2df70e06e03030
[   47.271015] R10: ff2df70e03354118 R11: fefefefefefefeff R12: 0000000000000000
[   47.271063] R13: 0000000000000010 R14: ff2df70e03354000 R15: ff2df70e0188f800
[   47.271109] FS:  0000000000000000(0000) GS:ff2df70e8f016000(0000) knlGS:0000000000000000
[   47.271155] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.271192] CR2: 00007fd8f07ba000 CR3: 000000002ea42001 CR4: 0000000000771ef0
[   47.271235] PKRU: 55555554
[   47.271440] Call Trace:
[   47.271458]  <TASK>
[   47.271473]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[   47.271499]  netif_close_many (net/core/dev.c:1804)
[   47.271531]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[   47.271563]  ? __queue_work (kernel/workqueue.c:2401)
[   47.271590]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.271619]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.271644]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.271664]  __fput (fs/file_table.c:510)
[   47.271689]  task_work_run (kernel/task_work.c:233)
[   47.271712]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.271737]  ? 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))
[   47.271769]  do_group_exit (kernel/exit.c:1119)
[   47.271794]  get_signal (kernel/signal.c:3037)
[   47.271817]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.271848]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.271882]  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)
[   47.271907]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.271942] RIP: 0033:0x4c2d9e
[   47.271964] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.272001] RSP: 002b:00007ffd21ae87d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.272044] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.272088] RDX: 0000000000000014 RSI: 00007ffd21ae88b0 RDI: 0000000000000007
[   47.272131] RBP: 00007ffd21ae87e0 R08: 00007ffd21ae8870 R09: 000000000000000c
[   47.272176] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd21ae9378
[   47.272218] R13: 00007ffd21ae93f8 R14: 00007ffd21ae89a0 R15: 0000000000543540
| [   47.272373] ------------[ cut here ]------------
| [   47.272403] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
| [   47.272456] Modules linked in:
| [   47.272543] Tainted: [W]=WARN
[   47.272571] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.272613] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.272645] 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
[   47.272747] RSP: 0018:ff682d88403e7bc8 EFLAGS: 00010286
[   47.272781] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.272828] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2df70e0188f800
[   47.272864] RBP: 0000000000000000 R08: ff2df70e030e25d0 R09: ff2df70e0308f830
[   47.272900] R10: ff2df70e03354118 R11: fefefefefefefeff R12: 0000000000000000
[   47.272938] R13: 0000000000000011 R14: ff2df70e03354000 R15: ff2df70e0188f800
[   47.272984] FS:  0000000000000000(0000) GS:ff2df70e8f016000(0000) knlGS:0000000000000000
[   47.273031] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.273069] CR2: 00007fd8f07ba000 CR3: 000000002ea42001 CR4: 0000000000771ef0
[   47.273112] PKRU: 55555554
[   47.273130] Call Trace:
[   47.273144]  <TASK>
[   47.273158]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.273186]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[   47.273210]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[   47.273233]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[   47.273260]  __fput (fs/file_table.c:510)
[   47.273282]  task_work_run (kernel/task_work.c:233)
[   47.273304]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[   47.273326]  ? 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))
[   47.273357]  do_group_exit (kernel/exit.c:1119)
[   47.273379]  get_signal (kernel/signal.c:3037)
[   47.273402]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[   47.273433]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[   47.273460]  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)
[   47.273484]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.273510] RIP: 0033:0x4c2d9e
[   47.273536] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[   47.273572] RSP: 002b:00007ffd21ae87d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.273606] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.273653] RDX: 0000000000000014 RSI: 00007ffd21ae88b0 RDI: 0000000000000007
[   47.273697] RBP: 00007ffd21ae87e0 R08: 00007ffd21ae8870 R09: 000000000000000c
[   47.273742] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd21ae9378
[   47.273778] R13: 00007ffd21ae93f8 R14: 00007ffd21ae89a0 R15: 0000000000543540
| [   47.280321] ------------[ cut here ]------------
| [   47.280363] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: 0/12
| [   47.280430] Modules linked in:
| [   47.280515] Tainted: [W]=WARN
[   47.280539] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.280576] Workqueue: netns cleanup_net
[   47.280603] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[   47.280636] 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
[   47.280734] RSP: 0018:ff682d8840067c78 EFLAGS: 00010286
[   47.280766] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.280812] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2df70e030d6500
[   47.280857] RBP: 0000000000000000 R08: ff2df70e01932950 R09: ff2df70e019ce02c
[   47.280899] R10: ff2df70e019c5118 R11: fefefefefefefeff R12: 0000000000000000
[   47.280942] R13: 0000000000000011 R14: ff2df70e019c5000 R15: ff2df70e030d6500
[   47.280990] FS:  0000000000000000(0000) GS:ff2df70e8ee96000(0000) knlGS:0000000000000000
[   47.281041] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.281075] CR2: 0000555a849112b8 CR3: 00000000019eb001 CR4: 0000000000771ef0
[   47.281125] PKRU: 55555554
[   47.281139] Call Trace:
[   47.281153]  <TASK>
[   47.281168]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[   47.281202]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[   47.281226]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[   47.281256]  cleanup_net (net/core/net_namespace.c:702)
[   47.281281]  process_one_work (kernel/workqueue.c:3314)
[   47.281307]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[   47.281330]  ? rescuer_thread (kernel/workqueue.c:3672)
[   47.281356]  kthread (kernel/kthread.c:436)
[   47.281382]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[   47.281404]  ret_from_fork (arch/x86/kernel/process.c:158)
[   47.281426]  ? 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