[   93.182225] ------------[ cut here ]------------
[   93.182304] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/248
[   93.182391] Modules linked in:
[   93.182448] CPU: 2 UID: 0 PID: 248 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.182542] Tainted: [W]=WARN
[   93.182595] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.182664] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.182737] 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
[   93.182867] RSP: 0018:ff8736c2804ffcc8 EFLAGS: 00010286
[   93.182929] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.183006] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff44176301e25f00
[   93.183087] RBP: 0000000000000000 R08: ff44176304507890 R09: ff441763019b902c
[   93.183161] R10: ff441763019bf118 R11: fefefefefefefeff R12: 0000000000000000
[   93.183237] R13: 0000000000000010 R14: ff441763019bf000 R15: ff44176301e25f00
[   93.183316] FS:  00007fd626ea0740(0000) GS:ff441763a7f96000(0000) knlGS:0000000000000000
[   93.183393] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.183462] CR2: 00007fd627062280 CR3: 0000000001907005 CR4: 0000000000771ef0
[   93.183539] PKRU: 55555554
[   93.183586] Call Trace:
[   93.183635]  <TASK>
[   93.183683]  rtmsg_ifinfo+0x3c/0xa0
[   93.183747]  register_netdevice+0x889/0x9f0
[   93.183804]  register_netdev+0x1e/0x30
[   93.183860]  loopback_net_init+0x57/0xb0
[   93.183917]  ? vsock_sysctl_init_net+0xb6/0x140
[   93.183981]  ops_init+0x68/0x140
[   93.184046]  setup_net+0x85/0x150
[   93.184102]  copy_net_ns+0xf5/0x200
[   93.184158]  create_new_namespaces+0x117/0x2f0
[   93.184223]  unshare_nsproxy_namespaces+0x85/0xb0
[   93.184285]  ksys_unshare+0x346/0x5e0
[   93.184344]  __x64_sys_unshare+0x12/0x20
[   93.184399]  do_syscall_64+0x104/0xfc0
[   93.184456]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.184521] RIP: 0033:0x7fd626f9bbcb
[   93.184576] 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
[   93.184711] RSP: 002b:00007ffd4321fa88 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[   93.184788] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd626f9bbcb
[   93.184863] RDX: 0000000000000000 RSI: 00007ffd4321f7f0 RDI: 0000000040000000
[   93.184941] RBP: 00007ffd4321fe10 R08: 00007ffd4321f9e0 R09: 0000000000000000
[   93.185023] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[   93.185099] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055e68342db68
[   93.185175]  </TASK>
[   93.185221] ---[ end trace 0000000000000000 ]---
[   93.185913] ------------[ cut here ]------------
[   93.185978] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/248
[   93.186069] Modules linked in:
[   93.186124] CPU: 2 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.186213] Tainted: [W]=WARN
[   93.186266] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.186333] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.186395] 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
[   93.186521] RSP: 0018:ff8736c2804ffd68 EFLAGS: 00010286
[   93.186583] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.186657] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff44176301e25f00
[   93.186740] RBP: 0000000000000000 R08: ff44176303350c90 R09: ff441763019be030
[   93.186816] R10: ff441763033cc118 R11: fefefefefefefeff R12: 0000000000000000
[   93.186890] R13: 0000000000000010 R14: ff441763033cc000 R15: ff44176301e25f00
[   93.186967] FS:  000000002ffb7400(0000) GS:ff441763a7f96000(0000) knlGS:0000000000000000
[   93.187046] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.187114] CR2: 00007f4061578000 CR3: 0000000003331006 CR4: 0000000000771ef0
[   93.187190] PKRU: 55555554
[   93.187237] Call Trace:
[   93.187284]  <TASK>
[   93.187332]  rtmsg_ifinfo+0x3c/0xa0
[   93.187388]  register_netdevice+0x889/0x9f0
[   93.187443]  __tun_chr_ioctl+0x83c/0x16c0
[   93.187501]  ? do_sys_openat2+0x9a/0xe0
[   93.187558]  __x64_sys_ioctl+0xa1/0xe0
[   93.187616]  do_syscall_64+0x104/0xfc0
[   93.187672]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.187741] RIP: 0033:0x47cc8d
[   93.187796] 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
[   93.187925] RSP: 002b:00007ffcd87c8140 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.187999] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.188085] RDX: 00007ffcd87c81c0 RSI: 00000000400454ca RDI: 0000000000000005
[   93.188160] RBP: 00007ffcd87c8190 R08: 0000000000000000 R09: 0000000000000000
[   93.188235] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcd87c8698
[   93.188309] R13: 00007ffcd87c8718 R14: 0000000000000002 R15: 0000000000543540
[   93.188384]  </TASK>
[   93.188430] ---[ end trace 0000000000000000 ]---
[   93.188510] ------------[ cut here ]------------
[   93.188570] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/248
[   93.188652] Modules linked in:
[   93.188714] CPU: 2 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.188803] Tainted: [W]=WARN
[   93.188857] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.188924] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.188986] 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
[   93.189117] RSP: 0018:ff8736c2804ffd60 EFLAGS: 00010286
[   93.189179] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[   93.189253] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff44176301e25f00
[   93.189328] RBP: 0000000000000002 R08: ff44176303350c90 R09: ff441763019be030
[   93.189402] R10: ff441763033cc118 R11: fefefefefefefeff R12: 0000000000000000
[   93.189478] R13: 0000000000000010 R14: ff441763033cc000 R15: ff44176301e25f00
[   93.189556] FS:  000000002ffb7400(0000) GS:ff441763a7f96000(0000) knlGS:0000000000000000
[   93.189633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.189701] CR2: 00007f4061578000 CR3: 0000000003331006 CR4: 0000000000771ef0
[   93.189785] PKRU: 55555554
[   93.189832] Call Trace:
[   93.189879]  <TASK>
[   93.189927]  rtnetlink_event+0x6e/0xb0
[   93.189982]  notifier_call_chain+0x6d/0x100
[   93.190044]  netdev_update_features+0x56/0x60
[   93.190108]  __tun_chr_ioctl+0xbf1/0x16c0
[   93.190164]  ? file_init_path+0x62/0x120
[   93.190221]  __x64_sys_ioctl+0xa1/0xe0
[   93.190277]  do_syscall_64+0x104/0xfc0
[   93.190333]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.190394] RIP: 0033:0x47cc8d
[   93.190449] 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
[   93.190577] RSP: 002b:00007ffcd87c8180 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.190652] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.190732] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[   93.190807] RBP: 00007ffcd87c81d0 R08: 0000000000000000 R09: 0000000000000000
[   93.190881] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcd87c8698
[   93.190955] R13: 00007ffcd87c8718 R14: 0000000000000002 R15: 0000000000543540
[   93.191035]  </TASK>
[   93.191082] ---[ end trace 0000000000000000 ]---
[   93.191161] ------------[ cut here ]------------
[   93.191221] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/248
[   93.191304] Modules linked in:
[   93.191359] CPU: 2 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.191448] Tainted: [W]=WARN
[   93.191502] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.191569] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.191631] 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
[   93.191768] RSP: 0018:ff8736c2804ffc10 EFLAGS: 00010286
[   93.191832] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[   93.191906] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff44176301e25f00
[   93.191980] RBP: 0000000000000000 R08: ff44176303350c90 R09: ff44176304786030
[   93.192057] R10: ff441763033cc118 R11: fefefefefefefeff R12: 0000000000000000
[   93.192130] R13: 0000000000000010 R14: ff441763033cc000 R15: ff44176301e25f00
[   93.192209] FS:  000000002ffb7400(0000) GS:ff441763a7f96000(0000) knlGS:0000000000000000
[   93.192285] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.192352] CR2: 00007f4061578000 CR3: 0000000003331006 CR4: 0000000000771ef0
[   93.192426] PKRU: 55555554
[   93.192473] Call Trace:
[   93.192520]  <TASK>
[   93.192567]  rtmsg_ifinfo+0x3c/0xa0
[   93.192623]  __dev_notify_flags+0xb1/0xf0
[   93.192680]  netif_change_flags+0x54/0x70
[   93.192743]  dev_change_flags+0x45/0x80
[   93.192799]  devinet_ioctl+0x607/0x7f0
[   93.192858]  inet_ioctl+0x229/0x240
[   93.192914]  ? __rtnl_unlock+0x35/0x60
[   93.192982]  sock_do_ioctl+0x75/0x140
[   93.193045]  __x64_sys_ioctl+0xa1/0xe0
[   93.193103]  do_syscall_64+0x104/0xfc0
[   93.193161]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.193222] RIP: 0033:0x47cc8d
[   93.193277] 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
[   93.193404] RSP: 002b:00007ffcd87c8160 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.193478] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.193552] RDX: 00007ffcd87c81d0 RSI: 0000000000008914 RDI: 0000000000000006
[   93.193631] RBP: 00007ffcd87c81b0 R08: 0000000000000000 R09: 0000000000000000
[   93.193714] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcd87c8698
[   93.193788] R13: 00007ffcd87c8718 R14: 0000000000000002 R15: 0000000000543540
[   93.193861]  </TASK>
[   93.193908] ---[ end trace 0000000000000000 ]---
[  138.168868] ------------[ cut here ]------------
[  138.168976] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/248
[  138.169080] Modules linked in:
[  138.169172] CPU: 2 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.169267] Tainted: [W]=WARN
[  138.169320] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.169388] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.169450] 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
[  138.169574] RSP: 0018:ff8736c2804ffb58 EFLAGS: 00010286
[  138.169637] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  138.170218] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff44176302ff4e00
[  138.170301] RBP: 0000000000000000 R08: ff44176303350c90 R09: ff44176304787030
[  138.170376] R10: ff441763033cc118 R11: fefefefefefefeff R12: 0000000000000000
[  138.170453] R13: 0000000000000010 R14: ff441763033cc000 R15: ff44176302ff4e00
[  138.170531] FS:  0000000000000000(0000) GS:ff441763a7f96000(0000) knlGS:0000000000000000
[  138.170607] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.170676] CR2: 00007f4061578000 CR3: 0000000008042001 CR4: 0000000000771ef0
[  138.170759] PKRU: 55555554
[  138.170805] Call Trace:
[  138.170853]  <TASK>
[  138.170901]  rtmsg_ifinfo+0x3c/0xa0
[  138.170957]  netif_close_many+0xed/0x190
[  138.171013]  unregister_netdevice_many_notify+0x267/0x9d0
[  138.171074]  ? __queue_work+0x141/0x550
[  138.171131]  unregister_netdevice_queue+0x9e/0xd0
[  138.171196]  __tun_detach+0x591/0x5b0
[  138.171253]  tun_chr_close+0x3f/0xc0
[  138.171307]  __fput+0xe8/0x2c0
[  138.171363]  task_work_run+0x63/0xa0
[  138.171419]  do_exit+0x2c1/0xba0
[  138.171475]  ? netlink_unicast+0x273/0x3a0
[  138.171530]  do_group_exit+0x2d/0xc0
[  138.171584]  get_signal+0x82e/0x900
[  138.171640]  arch_do_signal_or_restart+0x77/0x2b0
[  138.171710]  exit_to_user_mode_loop+0x75/0x4a0
[  138.171773]  do_syscall_64+0x439/0xfc0
[  138.171830]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.171892] RIP: 0033:0x4c2d9e
[  138.171945] Code: Unable to access opcode bytes at 0x4c2d74.
[  138.172010] RSP: 002b:00007ffcd87c7af0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  138.172084] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  138.172155] RDX: 0000000000000014 RSI: 00007ffcd87c7bd0 RDI: 0000000000000007
[  138.172233] RBP: 00007ffcd87c7b00 R08: 00007ffcd87c7b90 R09: 000000000000000c
[  138.172306] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffcd87c8698
[  138.172379] R13: 00007ffcd87c8718 R14: 00007ffcd87c7cc0 R15: 0000000000543540
[  138.172453]  </TASK>
[  138.172499] ---[ end trace 0000000000000000 ]---
[  138.172643] ------------[ cut here ]------------
[  138.172675] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/248
[  138.172731] Modules linked in:
[  138.172754] CPU: 3 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.172811] Tainted: [W]=WARN
[  138.172833] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.172870] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.172897] 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
[  138.172976] RSP: 0018:ff8736c2804ffbc8 EFLAGS: 00010286
[  138.173006] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.173044] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4417630303c300
[  138.173082] RBP: 0000000000000000 R08: ff44176303350c90 R09: ff44176308ff1030
[  138.173124] R10: ff441763033cc118 R11: fefefefefefefeff R12: 0000000000000000
[  138.173167] R13: 0000000000000011 R14: ff441763033cc000 R15: ff4417630303c300
[  138.173210] FS:  0000000000000000(0000) GS:ff441763a8016000(0000) knlGS:0000000000000000
[  138.173253] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.173285] CR2: 00007f05dadc86f0 CR3: 0000000008042003 CR4: 0000000000771ef0
[  138.173329] PKRU: 55555554
[  138.173352] Call Trace:
[  138.173366]  <TASK>
[  138.173383]  unregister_netdevice_many_notify+0x877/0x9d0
[  138.173411]  unregister_netdevice_queue+0x9e/0xd0
[  138.173438]  __tun_detach+0x591/0x5b0
[  138.173460]  tun_chr_close+0x3f/0xc0
[  138.173480]  __fput+0xe8/0x2c0
[  138.173501]  task_work_run+0x63/0xa0
[  138.173522]  do_exit+0x2c1/0xba0
[  138.173541]  ? netlink_unicast+0x273/0x3a0
[  138.173560]  do_group_exit+0x2d/0xc0
[  138.173583]  get_signal+0x82e/0x900
[  138.173604]  arch_do_signal_or_restart+0x77/0x2b0
[  138.173631]  exit_to_user_mode_loop+0x75/0x4a0
[  138.173653]  do_syscall_64+0x439/0xfc0
[  138.173676]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.173700] RIP: 0033:0x4c2d9e
[  138.173727] Code: Unable to access opcode bytes at 0x4c2d74.
[  138.173763] RSP: 002b:00007ffcd87c7af0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  138.173807] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  138.173845] RDX: 0000000000000014 RSI: 00007ffcd87c7bd0 RDI: 0000000000000007
[  138.173888] RBP: 00007ffcd87c7b00 R08: 00007ffcd87c7b90 R09: 000000000000000c
[  138.173937] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffcd87c8698
[  138.173983] R13: 00007ffcd87c8718 R14: 00007ffcd87c7cc0 R15: 0000000000543540
[  138.174024]  </TASK>
[  138.174038] ---[ end trace 0000000000000000 ]---
[  138.184840] ------------[ cut here ]------------
[  138.184885] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:0/12
[  138.184945] Modules linked in:
[  138.184970] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.185025] Tainted: [W]=WARN
[  138.185046] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.185079] Workqueue: netns cleanup_net
[  138.185099] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.185126] 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
[  138.185222] RSP: 0018:ff8736c280067c78 EFLAGS: 00010286
[  138.185256] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.185298] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff44176303320d00
[  138.185336] RBP: 0000000000000000 R08: ff44176304507890 R09: ff44176308ff402c
[  138.185376] R10: ff441763019bf118 R11: fefefefefefefeff R12: 0000000000000000
[  138.185418] R13: 0000000000000011 R14: ff441763019bf000 R15: ff44176303320d00
[  138.185462] FS:  0000000000000000(0000) GS:ff441763a7e96000(0000) knlGS:0000000000000000
[  138.185501] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.185536] CR2: 00007ff817bb8680 CR3: 0000000008042003 CR4: 0000000000771ef0
[  138.185575] PKRU: 55555554
[  138.185590] Call Trace:
[  138.185605]  <TASK>
[  138.185620]  unregister_netdevice_many_notify+0x877/0x9d0
[  138.185651]  default_device_exit_batch+0x318/0x390
[  138.185682]  ops_undo_list+0x10b/0x240
[  138.185708]  cleanup_net+0x1d7/0x2e0
[  138.185732]  process_one_work+0x162/0x360
[  138.185754]  worker_thread+0x16e/0x2d0
[  138.185777]  ? rescuer_thread+0x510/0x510
[  138.185799]  kthread+0xe1/0x120
[  138.185820]  ? kthread_park+0xa0/0xa0
[  138.185841]  ret_from_fork+0x16d/0x250
[  138.185864]  ? kthread_park+0xa0/0xa0
[  138.185886]  ret_from_fork_asm+0x11/0x20
[  138.185909]  </TASK>
[  138.185922] ---[ end trace 0000000000000000 ]---