[  365.990167] ------------[ cut here ]------------
[  365.990219] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/513
[  365.990283] Modules linked in:
[  365.990308] CPU: 3 UID: 0 PID: 513 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.990371] Tainted: [W]=WARN
[  365.990390] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.990434] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.990465] 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
[  365.990565] RSP: 0018:ff77a99b80887cc8 EFLAGS: 00010286
[  365.990593] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  365.990637] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1200
[  365.990678] RBP: 0000000000000000 R08: ff2556dc83283f10 R09: ff2556dc8302c02c
[  365.990723] R10: ff2556dc8302e118 R11: fefefefefefefeff R12: 0000000000000000
[  365.990763] R13: 0000000000000010 R14: ff2556dc8302e000 R15: ff2556dc818e1200
[  365.990812] FS:  00007ff0acc5a740(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  365.990856] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.990885] CR2: 000055dce6bf5008 CR3: 0000000003380003 CR4: 0000000000771ef0
[  365.990931] PKRU: 55555554
[  365.990944] Call Trace:
[  365.990961]  <TASK>
[  365.990975]  rtmsg_ifinfo+0x3c/0xa0
[  365.990999]  register_netdevice+0x889/0x9f0
[  365.991020]  register_netdev+0x1e/0x30
[  365.991040]  loopback_net_init+0x57/0xb0
[  365.991067]  ? vsock_sysctl_init_net+0xb6/0x140
[  365.991092]  ops_init+0x68/0x140
[  365.991116]  setup_net+0x85/0x150
[  365.991137]  copy_net_ns+0xf5/0x200
[  365.991156]  create_new_namespaces+0x117/0x2f0
[  365.991187]  unshare_nsproxy_namespaces+0x85/0xb0
[  365.991214]  ksys_unshare+0x346/0x5e0
[  365.991238]  __x64_sys_unshare+0x12/0x20
[  365.991259]  do_syscall_64+0x104/0xfc0
[  365.991285]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  365.991318] RIP: 0033:0x7ff0acd55bcb
[  365.991342] 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
[  365.991442] RSP: 002b:00007fff14392c18 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  365.991486] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff0acd55bcb
[  365.991529] RDX: 0000000000000000 RSI: 00007fff14392980 RDI: 0000000040000000
[  365.991570] RBP: 00007fff14392fa0 R08: 00007fff14392b70 R09: 0000000000000000
[  365.991616] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  365.991651] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055dce43a4b68
[  365.991699]  </TASK>
[  365.991714] ---[ end trace 0000000000000000 ]---
[  365.992664] ------------[ cut here ]------------
[  365.992696] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/513
[  365.992753] Modules linked in:
[  365.992775] CPU: 3 UID: 0 PID: 513 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.992842] Tainted: [W]=WARN
[  365.992866] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.992904] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.992928] 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
[  365.993024] RSP: 0018:ff77a99b80887d68 EFLAGS: 00010286
[  365.993053] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  365.993095] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1200
[  365.993134] RBP: 0000000000000000 R08: ff2556dc83165e10 R09: ff2556dc86a9b030
[  365.993177] R10: ff2556dc81fd4118 R11: fefefefefefefeff R12: 0000000000000000
[  365.993219] R13: 0000000000000010 R14: ff2556dc81fd4000 R15: ff2556dc818e1200
[  365.993267] FS:  00000000268d2400(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  365.993312] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.993340] CR2: 00007ffb1405e000 CR3: 000000000697d004 CR4: 0000000000771ef0
[  365.993381] PKRU: 55555554
[  365.993395] Call Trace:
[  365.993409]  <TASK>
[  365.993427]  rtmsg_ifinfo+0x3c/0xa0
[  365.993455]  register_netdevice+0x889/0x9f0
[  365.993475]  __tun_chr_ioctl+0x83c/0x16c0
[  365.993499]  ? do_sys_openat2+0x9a/0xe0
[  365.993529]  __x64_sys_ioctl+0xa1/0xe0
[  365.993554]  do_syscall_64+0x104/0xfc0
[  365.993576]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  365.993607] RIP: 0033:0x47cc8d
[  365.993631] 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
[  365.993724] RSP: 002b:00007fffb6422800 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  365.993771] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  365.993812] RDX: 00007fffb6422880 RSI: 00000000400454ca RDI: 0000000000000005
[  365.993846] RBP: 00007fffb6422850 R08: 0000000000000000 R09: 0000000000000000
[  365.993888] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb6422d58
[  365.993930] R13: 00007fffb6422dd8 R14: 0000000000000002 R15: 0000000000543540
[  365.993972]  </TASK>
[  365.993987] ---[ end trace 0000000000000000 ]---
[  365.994030] ------------[ cut here ]------------
[  365.994056] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/513
[  365.994103] Modules linked in:
[  365.994127] CPU: 3 UID: 0 PID: 513 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.994180] Tainted: [W]=WARN
[  365.994201] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.994236] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.994263] 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
[  365.994360] RSP: 0018:ff77a99b80887d60 EFLAGS: 00010286
[  365.994390] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  365.994437] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1200
[  365.994481] RBP: 0000000000000002 R08: ff2556dc83165e10 R09: ff2556dc86a9b030
[  365.994523] R10: ff2556dc81fd4118 R11: fefefefefefefeff R12: 0000000000000000
[  365.994564] R13: 0000000000000010 R14: ff2556dc81fd4000 R15: ff2556dc818e1200
[  365.994609] FS:  00000000268d2400(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  365.994652] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.994680] CR2: 00007ffb1405e000 CR3: 000000000697d004 CR4: 0000000000771ef0
[  365.994726] PKRU: 55555554
[  365.994738] Call Trace:
[  365.994755]  <TASK>
[  365.994768]  rtnetlink_event+0x6e/0xb0
[  365.994790]  notifier_call_chain+0x6d/0x100
[  365.994814]  netdev_update_features+0x56/0x60
[  365.994846]  __tun_chr_ioctl+0xbf1/0x16c0
[  365.994868]  ? file_init_path+0x62/0x120
[  365.994891]  __x64_sys_ioctl+0xa1/0xe0
[  365.994909]  do_syscall_64+0x104/0xfc0
[  365.994932]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  365.994964] RIP: 0033:0x47cc8d
[  365.994984] 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
[  365.995080] RSP: 002b:00007fffb6422840 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  365.995122] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  365.995164] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  365.995212] RBP: 00007fffb6422890 R08: 0000000000000000 R09: 0000000000000000
[  365.995245] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb6422d58
[  365.995285] R13: 00007fffb6422dd8 R14: 0000000000000002 R15: 0000000000543540
[  365.995327]  </TASK>
[  365.995341] ---[ end trace 0000000000000000 ]---
[  365.995384] ------------[ cut here ]------------
[  365.995410] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/513
[  365.995464] Modules linked in:
[  365.995487] CPU: 3 UID: 0 PID: 513 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.995544] Tainted: [W]=WARN
[  365.995566] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.995599] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.995629] 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
[  365.995724] RSP: 0018:ff77a99b80887c10 EFLAGS: 00010286
[  365.995754] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  365.995797] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1200
[  365.995842] RBP: 0000000000000000 R08: ff2556dc83165e10 R09: ff2556dc82e9d030
[  365.995884] R10: ff2556dc81fd4118 R11: fefefefefefefeff R12: 0000000000000000
[  365.995925] R13: 0000000000000010 R14: ff2556dc81fd4000 R15: ff2556dc818e1200
[  365.995967] FS:  00000000268d2400(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  365.996007] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.996044] CR2: 00007ffb1405e000 CR3: 000000000697d004 CR4: 0000000000771ef0
[  365.996084] PKRU: 55555554
[  365.996099] Call Trace:
[  365.996112]  <TASK>
[  365.996126]  rtmsg_ifinfo+0x3c/0xa0
[  365.996149]  __dev_notify_flags+0xb1/0xf0
[  365.996171]  netif_change_flags+0x54/0x70
[  365.996190]  dev_change_flags+0x45/0x80
[  365.996210]  devinet_ioctl+0x607/0x7f0
[  365.996236]  inet_ioctl+0x229/0x240
[  365.996259]  ? __rtnl_unlock+0x35/0x60
[  365.996284]  sock_do_ioctl+0x75/0x140
[  365.996305]  __x64_sys_ioctl+0xa1/0xe0
[  365.996329]  do_syscall_64+0x104/0xfc0
[  365.996353]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  365.996383] RIP: 0033:0x47cc8d
[  365.996408] 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
[  365.996509] RSP: 002b:00007fffb6422820 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  365.996547] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  365.996587] RDX: 00007fffb6422890 RSI: 0000000000008914 RDI: 0000000000000006
[  365.996626] RBP: 00007fffb6422870 R08: 0000000000000000 R09: 0000000000000000
[  365.996665] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb6422d58
[  365.996704] R13: 00007fffb6422dd8 R14: 0000000000000002 R15: 0000000000543540
[  365.996744]  </TASK>
[  365.996765] ---[ end trace 0000000000000000 ]---
[  410.979046] ------------[ cut here ]------------
[  410.979111] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/513
[  410.979181] Modules linked in:
[  410.979209] CPU: 3 UID: 0 PID: 513 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  410.979280] Tainted: [W]=WARN
[  410.979299] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  410.979340] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  410.979372] 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
[  410.979476] RSP: 0018:ff77a99b80887b58 EFLAGS: 00010286
[  410.979510] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  410.979550] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818ea000
[  410.979593] RBP: 0000000000000000 R08: ff2556dc83165e10 R09: ff2556dc82e9d030
[  410.979637] R10: ff2556dc81fd4118 R11: fefefefefefefeff R12: 0000000000000000
[  410.979706] R13: 0000000000000010 R14: ff2556dc81fd4000 R15: ff2556dc818ea000
[  410.979752] FS:  0000000000000000(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  410.979896] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  410.979936] CR2: 00007ffb1405e000 CR3: 0000000004a42005 CR4: 0000000000771ef0
[  410.979986] PKRU: 55555554
[  410.980003] Call Trace:
[  410.980020]  <TASK>
[  410.980037]  rtmsg_ifinfo+0x3c/0xa0
[  410.980065]  netif_close_many+0xed/0x190
[  410.980090]  unregister_netdevice_many_notify+0x267/0x9d0
[  410.980125]  ? __queue_work+0x141/0x550
[  410.980151]  unregister_netdevice_queue+0x9e/0xd0
[  410.980180]  __tun_detach+0x591/0x5b0
[  410.980206]  tun_chr_close+0x3f/0xc0
[  410.980228]  __fput+0xe8/0x2c0
[  410.980253]  task_work_run+0x63/0xa0
[  410.980276]  do_exit+0x2c1/0xba0
[  410.980302]  ? __x64_sys_close+0x47/0xa0
[  410.980325]  do_group_exit+0x2d/0xc0
[  410.980351]  get_signal+0x82e/0x900
[  410.980377]  ? fsnotify_grab_connector+0x4a/0x90
[  410.980414]  arch_do_signal_or_restart+0x77/0x2b0
[  410.980444]  ? __call_rcu_common.constprop.0+0x9a/0x340
[  410.980482]  ? __fput+0x17f/0x2c0
[  410.980505]  exit_to_user_mode_loop+0x75/0x4a0
[  410.980538]  do_syscall_64+0x439/0xfc0
[  410.980563]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  410.980594] RIP: 0033:0x47fb83
[  410.980617] Code: Unable to access opcode bytes at 0x47fb59.
[  410.980652] RSP: 002b:00007fffb64222f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  410.980697] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[  410.980745] RDX: 000000000000000e RSI: c8b2ede6303923a6 RDI: 0000000000000007
[  410.980786] RBP: 00007fffb64227f0 R08: 0000000000000041 R09: 00000000268d33e0
[  410.980835] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[  410.980877] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[  410.980921]  </TASK>
[  410.980936] ---[ end trace 0000000000000000 ]---
[  410.981122] ------------[ cut here ]------------
[  410.981180] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/513
[  410.981237] Modules linked in:
[  410.981263] CPU: 3 UID: 0 PID: 513 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  410.981324] Tainted: [W]=WARN
[  410.981346] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  410.981381] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  410.981410] 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
[  410.981511] RSP: 0018:ff77a99b80887bc8 EFLAGS: 00010286
[  410.981543] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  410.981586] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818ea000
[  410.981637] RBP: 0000000000000000 R08: ff2556dc83165e10 R09: ff2556dc89318030
[  410.981688] R10: ff2556dc81fd4118 R11: fefefefefefefeff R12: 0000000000000000
[  410.981731] R13: 0000000000000011 R14: ff2556dc81fd4000 R15: ff2556dc818ea000
[  410.981775] FS:  0000000000000000(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  410.981824] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  410.981857] CR2: 00007ffb1405e000 CR3: 0000000001c82001 CR4: 0000000000771ef0
[  410.981900] PKRU: 55555554
[  410.981914] Call Trace:
[  410.981927]  <TASK>
[  410.981942]  unregister_netdevice_many_notify+0x877/0x9d0
[  410.981972]  unregister_netdevice_queue+0x9e/0xd0
[  410.981997]  __tun_detach+0x591/0x5b0
[  410.982020]  tun_chr_close+0x3f/0xc0
[  410.982043]  __fput+0xe8/0x2c0
[  410.982068]  task_work_run+0x63/0xa0
[  410.982090]  do_exit+0x2c1/0xba0
[  410.982111]  ? __x64_sys_close+0x47/0xa0
[  410.982133]  do_group_exit+0x2d/0xc0
[  410.982156]  get_signal+0x82e/0x900
[  410.982179]  ? fsnotify_grab_connector+0x4a/0x90
[  410.982209]  arch_do_signal_or_restart+0x77/0x2b0
[  410.982242]  ? __call_rcu_common.constprop.0+0x9a/0x340
[  410.982274]  ? __fput+0x17f/0x2c0
[  410.982298]  exit_to_user_mode_loop+0x75/0x4a0
[  410.982330]  do_syscall_64+0x439/0xfc0
[  410.982351]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  410.982376] RIP: 0033:0x47fb83
[  410.982397] Code: Unable to access opcode bytes at 0x47fb59.
[  410.982434] RSP: 002b:00007fffb64222f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  410.982474] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[  410.982519] RDX: 000000000000000e RSI: c8b2ede6303923a6 RDI: 0000000000000007
[  410.982565] RBP: 00007fffb64227f0 R08: 0000000000000041 R09: 00000000268d33e0
[  410.982612] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[  410.982661] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[  410.982707]  </TASK>
[  410.982723] ---[ end trace 0000000000000000 ]---
[  410.992925] ------------[ cut here ]------------
[  410.992999] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: kworker/u16:1/64
[  410.993097] Modules linked in:
[  410.993154] CPU: 2 UID: 0 PID: 64 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  410.993250] Tainted: [W]=WARN
[  410.993305] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  410.993376] Workqueue: netns cleanup_net
[  410.993438] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  410.993502] 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
[  410.993634] RSP: 0018:ff77a99b80237c78 EFLAGS: 00010286
[  410.993706] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  410.993783] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81d57d00
[  410.993863] RBP: 0000000000000000 R08: ff2556dc83283f10 R09: ff2556dc8339a02c
[  410.993940] R10: ff2556dc8302e118 R11: fefefefefefefeff R12: 0000000000000000
[  410.994017] R13: 0000000000000011 R14: ff2556dc8302e000 R15: ff2556dc81d57d00
[  410.994098] FS:  0000000000000000(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  410.994180] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  410.994249] CR2: 00007f472ce87f98 CR3: 0000000004a42003 CR4: 0000000000771ef0
[  410.994330] PKRU: 55555554
[  410.994378] Call Trace:
[  410.994429]  <TASK>
[  410.994479]  unregister_netdevice_many_notify+0x877/0x9d0
[  410.994544]  default_device_exit_batch+0x318/0x390
[  410.994609]  ops_undo_list+0x10b/0x240
[  410.994674]  cleanup_net+0x1d7/0x2e0
[  410.994732]  process_one_work+0x162/0x360
[  410.994792]  worker_thread+0x16e/0x2d0
[  410.994854]  ? rescuer_thread+0x510/0x510
[  410.994912]  kthread+0xe1/0x120
[  410.994970]  ? kthread_park+0xa0/0xa0
[  410.995032]  ret_from_fork+0x16d/0x250
[  410.995091]  ? kthread_park+0xa0/0xa0
[  410.995148]  ret_from_fork_asm+0x11/0x20
[  410.995207]  </TASK>
[  410.995255] ---[ end trace 0000000000000000 ]---