======================================
| xx__-> [  956.990039] ------------[ cut here ]------------
| [  956.990089] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/1088
| [  956.990147] Modules linked in:
| [  956.990230] Tainted: [W]=WARN
[  956.990248] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  956.990284] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  956.990312] 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
[  956.990408] RSP: 0018:ff71d8c680f97cc8 EFLAGS: 00010286
[  956.990438] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  956.990484] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5de00
[  956.990533] RBP: 0000000000000000 R08: ff3cc9a4c3219c50 R09: ff3cc9a4c295502c
[  956.990574] R10: ff3cc9a4c4c47118 R11: fefefefefefefeff R12: 0000000000000000
[  956.990620] R13: 0000000000000010 R14: ff3cc9a4c4c47000 R15: ff3cc9a4c2b5de00
[  956.990668] FS:  00007f9f8f949740(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  956.990715] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  956.990751] CR2: 000055d7fd55b008 CR3: 00000000012e3006 CR4: 0000000000771ef0
[  956.990797] PKRU: 55555554
[  956.990813] Call Trace:
[  956.990829]  <TASK>
[  956.990844]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  956.990868]  register_netdevice (net/core/dev.c:11488)
[  956.990887]  register_netdev (net/core/dev.c:11552)
[  956.990908]  loopback_net_init (drivers/net/loopback.c:218)
[  956.990933]  ? vsock_sysctl_init_net (net/vmw_vsock/af_vsock.c:2933 net/vmw_vsock/af_vsock.c:2973)
[  956.990968]  ops_init (net/core/net_namespace.c:137)
[  956.990993]  setup_net (net/core/net_namespace.c:446)
[  956.991016]  copy_net_ns (net/core/net_namespace.c:579)
[  956.991040]  create_new_namespaces (kernel/nsproxy.c:132)
[  956.991072]  unshare_nsproxy_namespaces (kernel/nsproxy.c:234 (discriminator 4))
[  956.991100]  ksys_unshare (kernel/fork.c:3243)
[  956.991123]  __x64_sys_unshare (kernel/fork.c:3317 kernel/fork.c:3315 kernel/fork.c:3315)
[  956.991146]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  956.991172]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  956.991206] RIP: 0033:0x7f9f8fa44bcb
[  956.991228] 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
[  956.991333] RSP: 002b:00007ffd62d94f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  956.991374] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9f8fa44bcb
[  956.991420] RDX: 0000000000000000 RSI: 00007ffd62d94cf0 RDI: 0000000040000000
[  956.991461] RBP: 00007ffd62d95310 R08: 00007ffd62d94ee0 R09: 0000000000000000
[  956.991507] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  956.991551] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055d7bd6c2b68
| [  956.992209] ------------[ cut here ]------------
| [  956.992238] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/1088
| [  956.992298] Modules linked in:
| [  956.992379] Tainted: [W]=WARN
[  956.992400] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  956.992438] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  956.992466] 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
[  956.992573] RSP: 0018:ff71d8c680f97d68 EFLAGS: 00010286
[  956.992600] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  956.992640] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5de00
[  956.992681] RBP: 0000000000000000 R08: ff3cc9a4c191ad10 R09: ff3cc9a4c4c42030
[  956.992725] R10: ff3cc9a4c4f80118 R11: fefefefefefefeff R12: 0000000000000000
[  956.992770] R13: 0000000000000010 R14: ff3cc9a4c4f80000 R15: ff3cc9a4c2b5de00
[  956.992816] FS:  0000000010b3f400(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  956.992857] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  956.992892] CR2: 00007fac09762000 CR3: 0000000003255001 CR4: 0000000000771ef0
[  956.992935] PKRU: 55555554
[  956.992952] Call Trace:
[  956.992967]  <TASK>
[  956.992980]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  956.993003]  register_netdevice (net/core/dev.c:11488)
[  956.993027]  __tun_chr_ioctl (drivers/net/tun.c:2876 drivers/net/tun.c:3157)
[  956.993053]  ? do_sys_openat2 (./include/linux/fs.h:2553 fs/open.c:1363)
[  956.993079]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  956.993104]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  956.993127]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  956.993156] RIP: 0033:0x47cc8d
[  956.993180] 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 
[  956.993284] RSP: 002b:00007fffb53a91e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  956.993325] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  956.993369] RDX: 00007fffb53a9260 RSI: 00000000400454ca RDI: 0000000000000005
[  956.993418] RBP: 00007fffb53a9230 R08: 0000000000000000 R09: 0000000000000000
[  956.993464] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb53a9738
[  956.993514] R13: 00007fffb53a97b8 R14: 0000000000000002 R15: 0000000000543540
| [  956.993618] ------------[ cut here ]------------
| [  956.993645] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/1088
| [  956.993693] Modules linked in:
| [  956.993772] Tainted: [W]=WARN
[  956.993793] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  956.993831] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  956.993858] 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
[  956.993962] RSP: 0018:ff71d8c680f97d60 EFLAGS: 00010286
[  956.993995] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  956.994037] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5de00
[  956.994081] RBP: 0000000000000002 R08: ff3cc9a4c191ad10 R09: ff3cc9a4c4c42030
[  956.994125] R10: ff3cc9a4c4f80118 R11: fefefefefefefeff R12: 0000000000000000
[  956.994165] R13: 0000000000000010 R14: ff3cc9a4c4f80000 R15: ff3cc9a4c2b5de00
[  956.994207] FS:  0000000010b3f400(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  956.994249] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  956.994286] CR2: 00007fac09762000 CR3: 0000000003255001 CR4: 0000000000771ef0
[  956.994327] PKRU: 55555554
[  956.994344] Call Trace:
[  956.994359]  <TASK>
[  956.994373]  rtnetlink_event (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:7121)
[  956.994396]  notifier_call_chain (kernel/notifier.c:85)
[  956.994419]  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)
[  956.994451]  __tun_chr_ioctl (drivers/net/tun.c:2963 drivers/net/tun.c:3285)
[  956.994477]  ? file_init_path (./include/linux/pagemap.h:126 fs/file_table.c:368)
[  956.994526]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  956.994547]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  956.994570]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  956.994599] RIP: 0033:0x47cc8d
[  956.994619] 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 
[  956.994720] RSP: 002b:00007fffb53a9220 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  956.994763] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  956.994807] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  956.994847] RBP: 00007fffb53a9270 R08: 0000000000000000 R09: 0000000000000000
[  956.994887] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb53a9738
[  956.994930] R13: 00007fffb53a97b8 R14: 0000000000000002 R15: 0000000000543540
| [  956.995033] ------------[ cut here ]------------
| [  956.995062] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/1088
| [  956.995121] Modules linked in:
| [  956.995196] Tainted: [W]=WARN
[  956.995217] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  956.995250] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[  956.995277] 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
[  956.995376] RSP: 0018:ff71d8c680f97c10 EFLAGS: 00010286
[  956.995405] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  956.995448] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5de00
[  956.995492] RBP: 0000000000000000 R08: ff3cc9a4c191ad10 R09: ff3cc9a4c19ba030
[  956.995533] R10: ff3cc9a4c4f80118 R11: fefefefefefefeff R12: 0000000000000000
[  956.995573] R13: 0000000000000010 R14: ff3cc9a4c4f80000 R15: ff3cc9a4c2b5de00
[  956.995618] FS:  0000000010b3f400(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  956.995663] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  956.995698] CR2: 00007fac09762000 CR3: 0000000003255001 CR4: 0000000000771ef0
[  956.995739] PKRU: 55555554
[  956.995752] Call Trace:
[  956.995765]  <TASK>
[  956.995779]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[  956.995800]  __dev_notify_flags (net/core/dev.c:9787)
[  956.995824]  netif_change_flags (net/core/dev.c:9820)
[  956.995847]  dev_change_flags (net/core/dev_api.c:68)
[  956.995870]  devinet_ioctl (net/ipv4/devinet.c:1199)
[  956.995893]  inet_ioctl (net/ipv4/af_inet.c:1011)
[  956.995919]  ? __rtnl_unlock (net/core/rtnetlink.c:143)
[  956.995944]  sock_do_ioctl (net/socket.c:1313)
[  956.995971]  __x64_sys_ioctl (fs/ioctl.c:51 fs/ioctl.c:597 fs/ioctl.c:583 fs/ioctl.c:583)
[  956.995994]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[  956.996018]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[  956.996048] RIP: 0033:0x47cc8d
[  956.996070] 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 
[  956.996169] RSP: 002b:00007fffb53a9200 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  956.996209] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  956.996255] RDX: 00007fffb53a9270 RSI: 0000000000008914 RDI: 0000000000000006
[  956.996294] RBP: 00007fffb53a9250 R08: 0000000000000000 R09: 0000000000000000
[  956.996338] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb53a9738
[  956.996380] R13: 00007fffb53a97b8 R14: 0000000000000002 R15: 0000000000543540
| [ 1001.975146] ------------[ cut here ]------------
| [ 1001.975221] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/1088
| [ 1001.975300] Modules linked in:
| [ 1001.975388] Tainted: [W]=WARN
[ 1001.975417] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1001.975454] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[ 1001.975484] 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
[ 1001.975576] RSP: 0018:ff71d8c680f97b58 EFLAGS: 00010286
[ 1001.975604] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[ 1001.975652] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30d0500
[ 1001.975697] RBP: 0000000000000000 R08: ff3cc9a4c191ad10 R09: ff3cc9a4c19ba030
[ 1001.975736] R10: ff3cc9a4c4f80118 R11: fefefefefefefeff R12: 0000000000000000
[ 1001.975776] R13: 0000000000000010 R14: ff3cc9a4c4f80000 R15: ff3cc9a4c30d0500
[ 1001.975822] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[ 1001.975863] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1001.975896] CR2: 00007fac09762000 CR3: 0000000013a42002 CR4: 0000000000771ef0
[ 1001.975938] PKRU: 55555554
[ 1001.976153] Call Trace:
[ 1001.976177]  <TASK>
[ 1001.976197]  rtmsg_ifinfo (net/core/rtnetlink.c:4551 net/core/rtnetlink.c:4541 net/core/rtnetlink.c:4560)
[ 1001.976219]  netif_close_many (net/core/dev.c:1804)
[ 1001.976246]  unregister_netdevice_many_notify (net/core/dev.c:12406)
[ 1001.976276]  ? __queue_work (kernel/workqueue.c:2401)
[ 1001.976301]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[ 1001.976335]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[ 1001.976360]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[ 1001.976382]  __fput (fs/file_table.c:510)
[ 1001.976406]  task_work_run (kernel/task_work.c:233)
[ 1001.976431]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[ 1001.976454]  do_group_exit (kernel/exit.c:1119)
[ 1001.976476]  get_signal (kernel/signal.c:3037)
[ 1001.976503]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[ 1001.976536]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[ 1001.976566]  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)
[ 1001.976590]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[ 1001.976625] RIP: 0033:0x4c2d9e
[ 1001.976647] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[ 1001.976686] RSP: 002b:00007fffb53a8b90 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[ 1001.976727] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[ 1001.976767] RDX: 0000000000000014 RSI: 00007fffb53a8c70 RDI: 0000000000000007
[ 1001.976807] RBP: 00007fffb53a8ba0 R08: 00007fffb53a8c30 R09: 000000000000000c
[ 1001.976851] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000010b47aa0
[ 1001.976893] R13: 00007fffb53a97b8 R14: 00007fffb53a8d60 R15: 0000000000543540
| [ 1001.977231] ------------[ cut here ]------------
| [ 1001.977266] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/1088
| [ 1001.977314] Modules linked in:
| [ 1001.977397] Tainted: [W]=WARN
[ 1001.977421] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1001.977455] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[ 1001.977486] 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
[ 1001.977586] RSP: 0018:ff71d8c680f97bc8 EFLAGS: 00010286
[ 1001.977618] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[ 1001.977661] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30d0500
[ 1001.977702] RBP: 0000000000000000 R08: ff3cc9a4c191ad10 R09: ff3cc9a4c6330030
[ 1001.977747] R10: ff3cc9a4c4f80118 R11: fefefefefefefeff R12: 0000000000000000
[ 1001.977789] R13: 0000000000000011 R14: ff3cc9a4c4f80000 R15: ff3cc9a4c30d0500
[ 1001.977841] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[ 1001.977882] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1001.977920] CR2: 00007f7ac6ad2f98 CR3: 0000000013a42002 CR4: 0000000000771ef0
[ 1001.977970] PKRU: 55555554
[ 1001.977985] Call Trace:
[ 1001.978001]  <TASK>
[ 1001.978015]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[ 1001.978046]  unregister_netdevice_queue (net/core/dev.c:12497 net/core/dev.c:12309)
[ 1001.978076]  __tun_detach (./include/linux/netdevice.h:3455 drivers/net/tun.c:628)
[ 1001.978099]  tun_chr_close (drivers/net/tun.c:644 drivers/net/tun.c:3505)
[ 1001.978121]  __fput (fs/file_table.c:510)
[ 1001.978143]  task_work_run (kernel/task_work.c:233)
[ 1001.978165]  do_exit (./include/linux/task_work.h:40 kernel/exit.c:976)
[ 1001.978188]  do_group_exit (kernel/exit.c:1119)
[ 1001.978210]  get_signal (kernel/signal.c:3037)
[ 1001.978234]  arch_do_signal_or_restart (arch/x86/kernel/signal.c:337)
[ 1001.978263]  exit_to_user_mode_loop (kernel/entry/common.c:64 kernel/entry/common.c:98)
[ 1001.978293]  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)
[ 1001.978314]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[ 1001.978346] RIP: 0033:0x4c2d9e
[ 1001.978368] Code: Unable to access opcode bytes at 0x4c2d74.

Code starting with the faulting instruction
===========================================
[ 1001.978401] RSP: 002b:00007fffb53a8b90 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[ 1001.978442] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[ 1001.978486] RDX: 0000000000000014 RSI: 00007fffb53a8c70 RDI: 0000000000000007
[ 1001.978526] RBP: 00007fffb53a8ba0 R08: 00007fffb53a8c30 R09: 000000000000000c
[ 1001.978564] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000010b47aa0
[ 1001.978606] R13: 00007fffb53a97b8 R14: 00007fffb53a8d60 R15: 0000000000543540
| [ 1001.991066] ------------[ cut here ]------------
| [ 1001.991113] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: 1/65
| [ 1001.991176] Modules linked in:
| [ 1001.991262] Tainted: [W]=WARN
[ 1001.991286] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1001.991324] Workqueue: netns cleanup_net
[ 1001.991349] RIP: 0010:rtmsg_ifinfo_build_skb (net/core/rtnetlink.c:4523 (discriminator 3))
[ 1001.991374] 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
[ 1001.991472] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[ 1001.991500] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[ 1001.991537] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30d0600
[ 1001.991576] RBP: 0000000000000000 R08: ff3cc9a4c3219c50 R09: ff3cc9a4c68e602c
[ 1001.991627] R10: ff3cc9a4c4c47118 R11: fefefefefefefeff R12: 0000000000000000
[ 1001.991668] R13: 0000000000000011 R14: ff3cc9a4c4c47000 R15: ff3cc9a4c30d0600
[ 1001.991711] FS:  0000000000000000(0000) GS:ff3cc9a545f16000(0000) knlGS:0000000000000000
[ 1001.991756] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1001.991793] CR2: 00005652f65682b8 CR3: 00000000032cb002 CR4: 0000000000771ef0
[ 1001.991832] PKRU: 55555554
[ 1001.991844] Call Trace:
[ 1001.991856]  <TASK>
[ 1001.991871]  unregister_netdevice_many_notify (net/core/dev.c:12439)
[ 1001.991896]  default_device_exit_batch (net/core/dev.c:12497 net/core/dev.c:13089)
[ 1001.991924]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[ 1001.991955]  cleanup_net (net/core/net_namespace.c:702)
[ 1001.991977]  process_one_work (kernel/workqueue.c:3314)
[ 1001.992002]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[ 1001.992025]  ? rescuer_thread (kernel/workqueue.c:3672)
[ 1001.992048]  kthread (kernel/kthread.c:436)
[ 1001.992072]  ? kthread_park (kernel/kthread.c:725 (discriminator 4))
[ 1001.992095]  ret_from_fork (arch/x86/kernel/process.c:158)
[ 1001.992119]  ? 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