[    2.282865] ------------[ cut here ]------------
[    2.282931] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/159
[    2.282971] Modules linked in:
[    2.282988] CPU: 0 UID: 0 PID: 159 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.283023] Tainted: [W]=WARN
[    2.283036] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.283056] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.283080] 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
[    2.283150] RSP: 0018:ff5c779e003f7cc8 EFLAGS: 00010286
[    2.283169] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.283203] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c61000
[    2.283231] RBP: 0000000000000000 R08: ff4732ea83f0dd90 R09: ff4732ea84dfa02c
[    2.283256] R10: ff4732ea83c7d118 R11: fefefefefefefeff R12: 0000000000000000
[    2.283282] R13: 0000000000000010 R14: ff4732ea83c7d000 R15: ff4732ea83c61000
[    2.283310] FS:  00007f212425e740(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[    2.283334] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.283352] CR2: 000055afa076e310 CR3: 0000000003eca001 CR4: 0000000000771ef0
[    2.283378] PKRU: 55555554
[    2.283387] Call Trace:
[    2.283399]  <TASK>
[    2.283407]  rtmsg_ifinfo+0x3c/0xa0
[    2.283420]  register_netdevice+0x889/0x9f0
[    2.283434]  register_netdev+0x1e/0x30
[    2.283445]  loopback_net_init+0x57/0xb0
[    2.283463]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.283479]  ops_init+0x68/0x140
[    2.283493]  setup_net+0x85/0x150
[    2.283507]  copy_net_ns+0xf5/0x200
[    2.283520]  create_new_namespaces+0x117/0x2f0
[    2.283539]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.283555]  ksys_unshare+0x346/0x5e0
[    2.283571]  __x64_sys_unshare+0x12/0x20
[    2.283585]  do_syscall_64+0x104/0xfc0
[    2.283600]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.283617] RIP: 0033:0x7f2124359bcb
[    2.283630] 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
[    2.283679] RSP: 002b:00007ffe87c28278 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.283700] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2124359bcb
[    2.283723] RDX: 0000000000000000 RSI: 00007ffe87c27fe0 RDI: 0000000040000000
[    2.283744] RBP: 00007ffe87c28600 R08: 00007ffe87c281d0 R09: 0000000000000000
[    2.283768] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.283790] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055afa0771b68
[    2.283815]  </TASK>
[    2.283823] ---[ end trace 0000000000000000 ]---
[    2.288509] ------------[ cut here ]------------
[    2.288545] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
[    2.288584] Modules linked in:
[    2.288601] CPU: 0 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.288636] Tainted: [W]=WARN
[    2.288650] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.288674] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.288692] 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
[    2.288749] RSP: 0018:ff5c779e003f7d68 EFLAGS: 00010286
[    2.288769] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.288796] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c61000
[    2.288823] RBP: 0000000000000000 R08: ff4732ea83cf5850 R09: ff4732ea84dff030
[    2.288848] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.288874] R13: 0000000000000010 R14: ff4732ea84c9c000 R15: ff4732ea83c61000
[    2.288908] FS:  000000003eeed400(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[    2.288936] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.288957] CR2: 00007fef610fe000 CR3: 0000000004dd3002 CR4: 0000000000771ef0
[    2.288982] PKRU: 55555554
[    2.288991] Call Trace:
[    2.289002]  <TASK>
[    2.289012]  rtmsg_ifinfo+0x3c/0xa0
[    2.289027]  register_netdevice+0x889/0x9f0
[    2.289044]  __tun_chr_ioctl+0x83c/0x16c0
[    2.289060]  ? do_sys_openat2+0x9a/0xe0
[    2.289077]  __x64_sys_ioctl+0xa1/0xe0
[    2.289092]  do_syscall_64+0x104/0xfc0
[    2.289110]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.289130] RIP: 0033:0x47cc8d
[    2.289144] 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
[    2.289218] RSP: 002b:00007ffe6432ba80 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.289244] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.289269] RDX: 00007ffe6432bb00 RSI: 00000000400454ca RDI: 0000000000000005
[    2.289293] RBP: 00007ffe6432bad0 R08: 0000000000000000 R09: 0000000000000000
[    2.289318] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe6432bfd8
[    2.289342] R13: 00007ffe6432c058 R14: 0000000000000002 R15: 0000000000543540
[    2.289365]  </TASK>
[    2.289374] ---[ end trace 0000000000000000 ]---
[    2.289413] ------------[ cut here ]------------
[    2.289431] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
[    2.289461] Modules linked in:
[    2.289475] CPU: 0 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.289511] Tainted: [W]=WARN
[    2.289523] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.289545] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.289563] 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
[    2.289623] RSP: 0018:ff5c779e003f7d60 EFLAGS: 00010286
[    2.289644] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.289675] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c61000
[    2.289700] RBP: 0000000000000002 R08: ff4732ea83cf5850 R09: ff4732ea84dff030
[    2.289724] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.289749] R13: 0000000000000010 R14: ff4732ea84c9c000 R15: ff4732ea83c61000
[    2.289781] FS:  000000003eeed400(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[    2.289809] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.289830] CR2: 00007fef610fe000 CR3: 0000000004dd3002 CR4: 0000000000771ef0
[    2.289856] PKRU: 55555554
[    2.289865] Call Trace:
[    2.289875]  <TASK>
[    2.289885]  rtnetlink_event+0x6e/0xb0
[    2.289902]  notifier_call_chain+0x6d/0x100
[    2.289920]  netdev_update_features+0x56/0x60
[    2.289940]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.289956]  ? file_init_path+0x62/0x120
[    2.289971]  __x64_sys_ioctl+0xa1/0xe0
[    2.289985]  do_syscall_64+0x104/0xfc0
[    2.289999]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.290019] RIP: 0033:0x47cc8d
[    2.290032] 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
[    2.290090] RSP: 002b:00007ffe6432bac0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.290114] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.290138] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.290161] RBP: 00007ffe6432bb10 R08: 0000000000000005 R09: 0000000000001ff0
[    2.290185] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffe6432bfd8
[    2.290216] R13: 00007ffe6432c058 R14: 0000000000000002 R15: 0000000000543540
[    2.290239]  </TASK>
[    2.290248] ---[ end trace 0000000000000000 ]---
[    2.290283] ------------[ cut here ]------------
[    2.290299] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
[    2.290327] Modules linked in:
[    2.290339] CPU: 0 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.290372] Tainted: [W]=WARN
[    2.290386] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.290407] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.290424] 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
[    2.290480] RSP: 0018:ff5c779e003f7c10 EFLAGS: 00010286
[    2.290496] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.290523] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c61000
[    2.290548] RBP: 0000000000000000 R08: ff4732ea83cf5850 R09: ff4732ea84dfc030
[    2.290574] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.290600] R13: 0000000000000010 R14: ff4732ea84c9c000 R15: ff4732ea83c61000
[    2.290626] FS:  000000003eeed400(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[    2.290652] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.290672] CR2: 00007fef610fe000 CR3: 0000000004dd3002 CR4: 0000000000771ef0
[    2.290697] PKRU: 55555554
[    2.290707] Call Trace:
[    2.290716]  <TASK>
[    2.290725]  rtmsg_ifinfo+0x3c/0xa0
[    2.290739]  __dev_notify_flags+0xb1/0xf0
[    2.290756]  netif_change_flags+0x54/0x70
[    2.290770]  dev_change_flags+0x45/0x80
[    2.290783]  devinet_ioctl+0x607/0x7f0
[    2.290799]  inet_ioctl+0x229/0x240
[    2.290815]  ? __rtnl_unlock+0x35/0x60
[    2.290831]  sock_do_ioctl+0x75/0x140
[    2.290848]  __x64_sys_ioctl+0xa1/0xe0
[    2.290862]  do_syscall_64+0x104/0xfc0
[    2.290878]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.290899] RIP: 0033:0x47cc8d
[    2.290913] 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
[    2.290969] RSP: 002b:00007ffe6432baa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.290996] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.291023] RDX: 00007ffe6432bb10 RSI: 0000000000008914 RDI: 0000000000000006
[    2.291049] RBP: 00007ffe6432baf0 R08: 0000000000000005 R09: 0000000000001ff0
[    2.291072] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffe6432bfd8
[    2.291101] R13: 00007ffe6432c058 R14: 0000000000000002 R15: 0000000000543540
[    2.291125]  </TASK>
[    2.291135] ---[ end trace 0000000000000000 ]---
[   47.263610] ------------[ cut here ]------------
[   47.263710] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
[   47.263783] Modules linked in:
[   47.263813] CPU: 0 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.263873] Tainted: [W]=WARN
[   47.263897] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.263931] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.263964] 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
[   47.264061] RSP: 0018:ff5c779e003f7b58 EFLAGS: 00010286
[   47.264093] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.264132] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c73b00
[   47.264172] RBP: 0000000000000000 R08: ff4732ea83cf5850 R09: ff4732ea84dfc030
[   47.264769] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.264814] R13: 0000000000000010 R14: ff4732ea84c9c000 R15: ff4732ea83c73b00
[   47.264864] FS:  0000000000000000(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[   47.264906] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.264945] CR2: 00007fef610fe000 CR3: 000000001ce42003 CR4: 0000000000771ef0
[   47.264993] PKRU: 55555554
[   47.266570] Call Trace:
[   47.266600]  <TASK>
[   47.266622]  rtmsg_ifinfo+0x3c/0xa0
[   47.266648]  netif_close_many+0xed/0x190
[   47.266675]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.266704]  ? __queue_work+0x141/0x550
[   47.266733]  unregister_netdevice_queue+0x9e/0xd0
[   47.266764]  __tun_detach+0x591/0x5b0
[   47.266790]  tun_chr_close+0x3f/0xc0
[   47.266810]  __fput+0xe8/0x2c0
[   47.266839]  task_work_run+0x63/0xa0
[   47.266866]  do_exit+0x2c1/0xba0
[   47.266889]  ? ___sys_recvmsg+0xc6/0x100
[   47.266912]  do_group_exit+0x2d/0xc0
[   47.266934]  get_signal+0x82e/0x900
[   47.266960]  ? sysvec_reschedule_ipi+0x25/0x120
[   47.266994]  arch_do_signal_or_restart+0x77/0x2b0
[   47.267028]  exit_to_user_mode_loop+0x75/0x4a0
[   47.267068]  do_syscall_64+0x439/0xfc0
[   47.267093]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.267122] RIP: 0033:0x4c2d9e
[   47.267145] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.267180] RSP: 002b:00007ffe6432b430 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.267229] RAX: 0000000000000050 RBX: 00007ffe6432b4c0 RCX: 00000000004c2d9e
[   47.267271] RDX: 0000000000000000 RSI: 00007ffe6432b4d0 RDI: 0000000000000007
[   47.267316] RBP: 00007ffe6432b440 R08: 0000000000000000 R09: 0000000000000000
[   47.267355] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe6432b4b4
[   47.267395] R13: 00007ffe6432c058 R14: 00007ffe6432b600 R15: 0000000000543540
[   47.267435]  </TASK>
[   47.267450] ---[ end trace 0000000000000000 ]---
[   47.267554] ------------[ cut here ]------------
[   47.267582] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
[   47.267630] Modules linked in:
[   47.267654] CPU: 0 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.267708] Tainted: [W]=WARN
[   47.267732] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.267766] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.267792] 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
[   47.267883] RSP: 0018:ff5c779e003f7bc8 EFLAGS: 00010286
[   47.267910] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.267960] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c73b00
[   47.268003] RBP: 0000000000000000 R08: ff4732ea83cf5850 R09: ff4732ea84e00830
[   47.268049] R10: ff4732ea84c9c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.268091] R13: 0000000000000011 R14: ff4732ea84c9c000 R15: ff4732ea83c73b00
[   47.268132] FS:  0000000000000000(0000) GS:ff4732eb24c96000(0000) knlGS:0000000000000000
[   47.268177] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.268214] CR2: 00007fef610fe000 CR3: 000000001ce42003 CR4: 0000000000771ef0
[   47.268255] PKRU: 55555554
[   47.268271] Call Trace:
[   47.268285]  <TASK>
[   47.268300]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.268328]  unregister_netdevice_queue+0x9e/0xd0
[   47.269940]  __tun_detach+0x591/0x5b0
[   47.269977]  tun_chr_close+0x3f/0xc0
[   47.270001]  __fput+0xe8/0x2c0
[   47.270027]  task_work_run+0x63/0xa0
[   47.270054]  do_exit+0x2c1/0xba0
[   47.270080]  ? ___sys_recvmsg+0xc6/0x100
[   47.270106]  do_group_exit+0x2d/0xc0
[   47.270126]  get_signal+0x82e/0x900
[   47.270155]  ? sysvec_reschedule_ipi+0x25/0x120
[   47.270197]  arch_do_signal_or_restart+0x77/0x2b0
[   47.270229]  exit_to_user_mode_loop+0x75/0x4a0
[   47.270259]  do_syscall_64+0x439/0xfc0
[   47.270283]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.270314] RIP: 0033:0x4c2d9e
[   47.270337] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.270373] RSP: 002b:00007ffe6432b430 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.270417] RAX: 0000000000000050 RBX: 00007ffe6432b4c0 RCX: 00000000004c2d9e
[   47.270455] RDX: 0000000000000000 RSI: 00007ffe6432b4d0 RDI: 0000000000000007
[   47.270494] RBP: 00007ffe6432b440 R08: 0000000000000000 R09: 0000000000000000
[   47.270536] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe6432b4b4
[   47.270578] R13: 00007ffe6432c058 R14: 00007ffe6432b600 R15: 0000000000543540
[   47.270622]  </TASK>
[   47.270635] ---[ end trace 0000000000000000 ]---
[   47.278312] ------------[ cut here ]------------
[   47.278358] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:0/12
[   47.278419] Modules linked in:
[   47.278444] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.278503] Tainted: [W]=WARN
[   47.278523] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.278557] Workqueue: netns cleanup_net
[   47.278582] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.278614] 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
[   47.278706] RSP: 0018:ff5c779e00067c78 EFLAGS: 00010286
[   47.278735] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.278776] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4732ea83c73e00
[   47.278817] RBP: 0000000000000000 R08: ff4732ea83f0dd90 R09: ff4732ea84d4b82c
[   47.278854] R10: ff4732ea83c7d118 R11: fefefefefefefeff R12: 0000000000000000
[   47.278897] R13: 0000000000000011 R14: ff4732ea83c7d000 R15: ff4732ea83c73e00
[   47.278938] FS:  0000000000000000(0000) GS:ff4732eb24d16000(0000) knlGS:0000000000000000
[   47.278979] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.279009] CR2: 00007fe90057f0a0 CR3: 000000001ce42005 CR4: 0000000000771ef0
[   47.279053] PKRU: 55555554
[   47.279069] Call Trace:
[   47.279085]  <TASK>
[   47.279101]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.279132]  default_device_exit_batch+0x318/0x390
[   47.279160]  ops_undo_list+0x10b/0x240
[   47.279186]  cleanup_net+0x1d7/0x2e0
[   47.279217]  process_one_work+0x162/0x360
[   47.279243]  worker_thread+0x16e/0x2d0
[   47.279267]  ? rescuer_thread+0x510/0x510
[   47.279289]  kthread+0xe1/0x120
[   47.279311]  ? kthread_park+0xa0/0xa0
[   47.279332]  ret_from_fork+0x16d/0x250
[   47.279357]  ? kthread_park+0xa0/0xa0
[   47.279382]  ret_from_fork_asm+0x11/0x20
[   47.279405]  </TASK>
[   47.279419] ---[ end trace 0000000000000000 ]---