[   93.213062] ------------[ cut here ]------------
[   93.213146] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/249
[   93.213236] Modules linked in:
[   93.213300] CPU: 2 UID: 0 PID: 249 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.213391] Tainted: [W]=WARN
[   93.213445] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.213514] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.213578] 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
[   93.213711] RSP: 0018:ff71f0c3804dfcc8 EFLAGS: 00010286
[   93.213775] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.213850] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023500
[   93.213927] RBP: 0000000000000000 R08: ff232310830ba610 R09: ff2323108448902c
[   93.214010] R10: ff23231082063118 R11: fefefefefefefeff R12: 0000000000000000
[   93.214087] R13: 0000000000000010 R14: ff23231082063000 R15: ff23231083023500
[   93.214168] FS:  00007f1cef36a740(0000) GS:ff23231129796000(0000) knlGS:0000000000000000
[   93.214250] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.214323] CR2: 0000559231866008 CR3: 00000000046ed006 CR4: 0000000000771ef0
[   93.214401] PKRU: 55555554
[   93.214449] Call Trace:
[   93.214499]  <TASK>
[   93.214549]  rtmsg_ifinfo+0x3c/0xa0
[   93.214606]  register_netdevice+0x889/0x9f0
[   93.214664]  register_netdev+0x1e/0x30
[   93.214721]  loopback_net_init+0x57/0xb0
[   93.214781]  ? vsock_sysctl_init_net+0xb6/0x140
[   93.214846]  ops_init+0x68/0x140
[   93.214905]  setup_net+0x85/0x150
[   93.214963]  copy_net_ns+0xf5/0x200
[   93.215027]  create_new_namespaces+0x117/0x2f0
[   93.215093]  unshare_nsproxy_namespaces+0x85/0xb0
[   93.215157]  ksys_unshare+0x346/0x5e0
[   93.215217]  __x64_sys_unshare+0x12/0x20
[   93.215275]  do_syscall_64+0x104/0xfc0
[   93.215340]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.215404] RIP: 0033:0x7f1cef465bcb
[   93.215461] 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
[   93.215593] RSP: 002b:00007fffe6d90438 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[   93.215671] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1cef465bcb
[   93.215749] RDX: 0000000000000000 RSI: 00007fffe6d901a0 RDI: 0000000040000000
[   93.215826] RBP: 00007fffe6d907c0 R08: 00007fffe6d90390 R09: 0000000000000000
[   93.215903] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[   93.215982] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005591ff35fb68
[   93.216076]  </TASK>
[   93.216124] ---[ end trace 0000000000000000 ]---
[   93.216805] ------------[ cut here ]------------
[   93.216869] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/249
[   93.216955] Modules linked in:
[   93.217021] CPU: 2 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.217112] Tainted: [W]=WARN
[   93.217167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.217237] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.217309] 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
[   93.217445] RSP: 0018:ff71f0c3804dfd68 EFLAGS: 00010286
[   93.217509] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.217586] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023500
[   93.217667] RBP: 0000000000000000 R08: ff23231082e529d0 R09: ff232310819bc030
[   93.217745] R10: ff23231086c9c118 R11: fefefefefefefeff R12: 0000000000000000
[   93.217822] R13: 0000000000000010 R14: ff23231086c9c000 R15: ff23231083023500
[   93.217915] FS:  0000000018fd3400(0000) GS:ff23231129796000(0000) knlGS:0000000000000000
[   93.218002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.218073] CR2: 00007ff36a402000 CR3: 0000000004570001 CR4: 0000000000771ef0
[   93.218152] PKRU: 55555554
[   93.218200] Call Trace:
[   93.218248]  <TASK>
[   93.218304]  rtmsg_ifinfo+0x3c/0xa0
[   93.218362]  register_netdevice+0x889/0x9f0
[   93.218419]  __tun_chr_ioctl+0x83c/0x16c0
[   93.218478]  ? do_sys_openat2+0x9a/0xe0
[   93.218537]  __x64_sys_ioctl+0xa1/0xe0
[   93.218596]  do_syscall_64+0x104/0xfc0
[   93.218655]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.218719] RIP: 0033:0x47cc8d
[   93.218775] 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
[   93.218908] RSP: 002b:00007ffdc9963d20 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.218986] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.219068] RDX: 00007ffdc9963da0 RSI: 00000000400454ca RDI: 0000000000000005
[   93.219146] RBP: 00007ffdc9963d70 R08: 0000000000000000 R09: 0000000000000000
[   93.219222] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdc9964278
[   93.219306] R13: 00007ffdc99642f8 R14: 0000000000000002 R15: 0000000000543540
[   93.219383]  </TASK>
[   93.219432] ---[ end trace 0000000000000000 ]---
[   93.219515] ------------[ cut here ]------------
[   93.219577] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/249
[   93.219665] Modules linked in:
[   93.219722] CPU: 2 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.219816] Tainted: [W]=WARN
[   93.219871] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.219941] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.220017] 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
[   93.220147] RSP: 0018:ff71f0c3804dfd60 EFLAGS: 00010286
[   93.220210] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[   93.220288] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023500
[   93.220372] RBP: 0000000000000002 R08: ff23231082e529d0 R09: ff232310819bc030
[   93.220448] R10: ff23231086c9c118 R11: fefefefefefefeff R12: 0000000000000000
[   93.220525] R13: 0000000000000010 R14: ff23231086c9c000 R15: ff23231083023500
[   93.220605] FS:  0000000018fd3400(0000) GS:ff23231129796000(0000) knlGS:0000000000000000
[   93.220684] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.220753] CR2: 00007ff36a402000 CR3: 0000000004570001 CR4: 0000000000771ef0
[   93.220832] PKRU: 55555554
[   93.220881] Call Trace:
[   93.220929]  <TASK>
[   93.220978]  rtnetlink_event+0x6e/0xb0
[   93.221039]  notifier_call_chain+0x6d/0x100
[   93.221098]  netdev_update_features+0x56/0x60
[   93.221163]  __tun_chr_ioctl+0xbf1/0x16c0
[   93.221224]  ? file_init_path+0x62/0x120
[   93.221283]  __x64_sys_ioctl+0xa1/0xe0
[   93.221343]  do_syscall_64+0x104/0xfc0
[   93.221401]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.221464] RIP: 0033:0x47cc8d
[   93.221520] 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
[   93.221651] RSP: 002b:00007ffdc9963d60 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.221728] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.221804] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[   93.221884] RBP: 00007ffdc9963db0 R08: 0000000000000000 R09: 0000000000000000
[   93.221959] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdc9964278
[   93.222045] R13: 00007ffdc99642f8 R14: 0000000000000002 R15: 0000000000543540
[   93.222124]  </TASK>
[   93.222172] ---[ end trace 0000000000000000 ]---
[   93.222257] ------------[ cut here ]------------
[   93.222324] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/249
[   93.222410] Modules linked in:
[   93.222467] CPU: 2 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.222558] Tainted: [W]=WARN
[   93.222613] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.222683] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.222747] 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
[   93.222877] RSP: 0018:ff71f0c3804dfc10 EFLAGS: 00010286
[   93.222940] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[   93.223023] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023500
[   93.223099] RBP: 0000000000000000 R08: ff23231082e529d0 R09: ff2323108448b030
[   93.223176] R10: ff23231086c9c118 R11: fefefefefefefeff R12: 0000000000000000
[   93.223252] R13: 0000000000000010 R14: ff23231086c9c000 R15: ff23231083023500
[   93.223336] FS:  0000000018fd3400(0000) GS:ff23231129796000(0000) knlGS:0000000000000000
[   93.223414] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.223484] CR2: 00007ff36a402000 CR3: 0000000004570001 CR4: 0000000000771ef0
[   93.223562] PKRU: 55555554
[   93.223610] Call Trace:
[   93.223659]  <TASK>
[   93.223708]  rtmsg_ifinfo+0x3c/0xa0
[   93.223765]  __dev_notify_flags+0xb1/0xf0
[   93.223824]  netif_change_flags+0x54/0x70
[   93.223883]  dev_change_flags+0x45/0x80
[   93.223945]  devinet_ioctl+0x607/0x7f0
[   93.224012]  inet_ioctl+0x229/0x240
[   93.224070]  ? __rtnl_unlock+0x35/0x60
[   93.224127]  sock_do_ioctl+0x75/0x140
[   93.224187]  __x64_sys_ioctl+0xa1/0xe0
[   93.224244]  do_syscall_64+0x104/0xfc0
[   93.224308]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.224373] RIP: 0033:0x47cc8d
[   93.224430] 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
[   93.224561] RSP: 002b:00007ffdc9963d40 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.224639] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.224715] RDX: 00007ffdc9963db0 RSI: 0000000000008914 RDI: 0000000000000006
[   93.224792] RBP: 00007ffdc9963d90 R08: 0000000000000000 R09: 0000000000000000
[   93.224869] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdc9964278
[   93.224946] R13: 00007ffdc99642f8 R14: 0000000000000002 R15: 0000000000543540
[   93.225029]  </TASK>
[   93.225078] ---[ end trace 0000000000000000 ]---
[  138.199843] ------------[ cut here ]------------
[  138.199964] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/249
[  138.200067] Modules linked in:
[  138.200130] CPU: 2 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.200212] Tainted: [W]=WARN
[  138.200267] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.200339] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.200404] 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
[  138.200545] RSP: 0018:ff71f0c3804dfb58 EFLAGS: 00010286
[  138.200609] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  138.200691] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023400
[  138.200772] RBP: 0000000000000000 R08: ff23231082e529d0 R09: ff2323108448b030
[  138.200852] R10: ff23231086c9c118 R11: fefefefefefefeff R12: 0000000000000000
[  138.200930] R13: 0000000000000010 R14: ff23231086c9c000 R15: ff23231083023400
[  138.201225] FS:  0000000000000000(0000) GS:ff23231129796000(0000) knlGS:0000000000000000
[  138.201309] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.201378] CR2: 00007ff36a402000 CR3: 0000000020c42004 CR4: 0000000000771ef0
[  138.201463] PKRU: 55555554
[  138.201512] Call Trace:
[  138.201562]  <TASK>
[  138.201611]  rtmsg_ifinfo+0x3c/0xa0
[  138.201669]  netif_close_many+0xed/0x190
[  138.201728]  unregister_netdevice_many_notify+0x267/0x9d0
[  138.201793]  ? __queue_work+0x141/0x550
[  138.201852]  unregister_netdevice_queue+0x9e/0xd0
[  138.201916]  __tun_detach+0x591/0x5b0
[  138.201976]  tun_chr_close+0x3f/0xc0
[  138.202038]  __fput+0xe8/0x2c0
[  138.202097]  task_work_run+0x63/0xa0
[  138.202154]  do_exit+0x2c1/0xba0
[  138.202212]  ? __x64_sys_close+0x47/0xa0
[  138.202269]  do_group_exit+0x2d/0xc0
[  138.202325]  get_signal+0x82e/0x900
[  138.202383]  ? fsnotify_grab_connector+0x4a/0x90
[  138.202454]  arch_do_signal_or_restart+0x77/0x2b0
[  138.202519]  ? __call_rcu_common.constprop.0+0x9a/0x340
[  138.202585]  ? __fput+0x17f/0x2c0
[  138.202641]  exit_to_user_mode_loop+0x75/0x4a0
[  138.202706]  do_syscall_64+0x439/0xfc0
[  138.202764]  ? __sysvec_call_function_single+0x20/0xd0
[  138.202830]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.202894] RIP: 0033:0x47fb83
[  138.202951] Code: Unable to access opcode bytes at 0x47fb59.
[  138.203026] RSP: 002b:00007ffdc9963810 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  138.203104] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[  138.203180] RDX: 000000000000000e RSI: 25b9b1dd0c52733c RDI: 0000000000000007
[  138.203260] RBP: 00007ffdc9963d10 R08: 0000000000000041 R09: 0000000018fd43e0
[  138.203335] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[  138.203412] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[  138.203496]  </TASK>
[  138.203544] ---[ end trace 0000000000000000 ]---
[  138.203698] ------------[ cut here ]------------
[  138.203730] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/249
[  138.203774] Modules linked in:
[  138.203797] CPU: 3 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.203855] Tainted: [W]=WARN
[  138.203875] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.203913] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.203942] 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
[  138.204063] RSP: 0018:ff71f0c3804dfbc8 EFLAGS: 00010286
[  138.204089] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.204173] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023300
[  138.204259] RBP: 0000000000000000 R08: ff23231082e529d0 R09: ff23231086419830
[  138.204332] R10: ff23231086c9c118 R11: fefefefefefefeff R12: 0000000000000000
[  138.204405] R13: 0000000000000011 R14: ff23231086c9c000 R15: ff23231083023300
[  138.204510] FS:  0000000000000000(0000) GS:ff23231129816000(0000) knlGS:0000000000000000
[  138.204585] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.204650] CR2: 00007f4aff3dbf98 CR3: 0000000020c42003 CR4: 0000000000771ef0
[  138.204738] PKRU: 55555554
[  138.204760] Call Trace:
[  138.204789]  <TASK>
[  138.204814]  unregister_netdevice_many_notify+0x877/0x9d0
[  138.204871]  unregister_netdevice_queue+0x9e/0xd0
[  138.204908]  __tun_detach+0x591/0x5b0
[  138.204939]  tun_chr_close+0x3f/0xc0
[  138.204983]  __fput+0xe8/0x2c0
[  138.205030]  task_work_run+0x63/0xa0
[  138.205080]  do_exit+0x2c1/0xba0
[  138.205138]  ? __x64_sys_close+0x47/0xa0
[  138.205176]  do_group_exit+0x2d/0xc0
[  138.205202]  get_signal+0x82e/0x900
[  138.205222]  ? fsnotify_grab_connector+0x4a/0x90
[  138.205276]  arch_do_signal_or_restart+0x77/0x2b0
[  138.205329]  ? __call_rcu_common.constprop.0+0x9a/0x340
[  138.205387]  ? __fput+0x17f/0x2c0
[  138.205425]  exit_to_user_mode_loop+0x75/0x4a0
[  138.205461]  do_syscall_64+0x439/0xfc0
[  138.205483]  ? __sysvec_call_function_single+0x20/0xd0
[  138.205510]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.205545] RIP: 0033:0x47fb83
[  138.205586] Code: Unable to access opcode bytes at 0x47fb59.
[  138.205626] RSP: 002b:00007ffdc9963810 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  138.205669] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[  138.205712] RDX: 000000000000000e RSI: 25b9b1dd0c52733c RDI: 0000000000000007
[  138.205755] RBP: 00007ffdc9963d10 R08: 0000000000000041 R09: 0000000018fd43e0
[  138.205801] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[  138.205846] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[  138.205887]  </TASK>
[  138.205900] ---[ end trace 0000000000000000 ]---
[  138.214125] ------------[ cut here ]------------
[  138.214156] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:0/12
[  138.214222] Modules linked in:
[  138.214246] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.214308] Tainted: [W]=WARN
[  138.214330] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.214366] Workqueue: netns cleanup_net
[  138.214392] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.214421] 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
[  138.214520] RSP: 0018:ff71f0c380067c78 EFLAGS: 00010286
[  138.214549] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.214590] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023300
[  138.214633] RBP: 0000000000000000 R08: ff232310830ba610 R09: ff2323108641602c
[  138.214679] R10: ff23231082063118 R11: fefefefefefefeff R12: 0000000000000000
[  138.214718] R13: 0000000000000011 R14: ff23231082063000 R15: ff23231083023300
[  138.214761] FS:  0000000000000000(0000) GS:ff23231129816000(0000) knlGS:0000000000000000
[  138.214806] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.214837] CR2: 00007fb1f531ef98 CR3: 0000000020c42004 CR4: 0000000000771ef0
[  138.214878] PKRU: 55555554
[  138.214893] Call Trace:
[  138.214907]  <TASK>
[  138.214921]  unregister_netdevice_many_notify+0x877/0x9d0
[  138.214949]  default_device_exit_batch+0x318/0x390
[  138.214978]  ops_undo_list+0x10b/0x240
[  138.215008]  cleanup_net+0x1d7/0x2e0
[  138.215032]  process_one_work+0x162/0x360
[  138.215065]  worker_thread+0x16e/0x2d0
[  138.215088]  ? rescuer_thread+0x510/0x510
[  138.215114]  kthread+0xe1/0x120
[  138.215139]  ? kthread_park+0xa0/0xa0
[  138.215161]  ret_from_fork+0x16d/0x250
[  138.215184]  ? kthread_park+0xa0/0xa0
[  138.215207]  ret_from_fork_asm+0x11/0x20
[  138.215234]  </TASK>
[  138.215249] ---[ end trace 0000000000000000 ]---