[  456.893261] ------------[ cut here ]------------
[  456.893353] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/602
[  456.893447] Modules linked in:
[  456.893506] CPU: 2 UID: 0 PID: 602 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  456.893599] Tainted: [W]=WARN
[  456.893654] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  456.893725] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  456.893788] 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
[  456.893921] RSP: 0018:ff71d8c680947cc8 EFLAGS: 00010286
[  456.893997] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  456.894075] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77c00
[  456.894151] RBP: 0000000000000000 R08: ff3cc9a4c19211d0 R09: ff3cc9a4c4c1202c
[  456.894228] R10: ff3cc9a4c4c46118 R11: fefefefefefefeff R12: 0000000000000000
[  456.894304] R13: 0000000000000010 R14: ff3cc9a4c4c46000 R15: ff3cc9a4c2b77c00
[  456.894386] FS:  00007ff90fdff740(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  456.894464] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  456.894534] CR2: 00007ff90ffc1280 CR3: 0000000003222005 CR4: 0000000000771ef0
[  456.894613] PKRU: 55555554
[  456.894661] Call Trace:
[  456.894712]  <TASK>
[  456.894761]  rtmsg_ifinfo+0x3c/0xa0
[  456.894819]  register_netdevice+0x889/0x9f0
[  456.894877]  register_netdev+0x1e/0x30
[  456.894934]  loopback_net_init+0x57/0xb0
[  456.895005]  ? vsock_sysctl_init_net+0xb6/0x140
[  456.895077]  ops_init+0x68/0x140
[  456.895137]  setup_net+0x85/0x150
[  456.895194]  copy_net_ns+0xf5/0x200
[  456.895252]  create_new_namespaces+0x117/0x2f0
[  456.895319]  unshare_nsproxy_namespaces+0x85/0xb0
[  456.895383]  ksys_unshare+0x346/0x5e0
[  456.895443]  __x64_sys_unshare+0x12/0x20
[  456.895500]  do_syscall_64+0x104/0xfc0
[  456.895559]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  456.895624] RIP: 0033:0x7ff90fefabcb
[  456.895681] 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
[  456.895812] RSP: 002b:00007fffca8edab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  456.895890] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff90fefabcb
[  456.895982] RDX: 0000000000000000 RSI: 00007fffca8ed820 RDI: 0000000040000000
[  456.896060] RBP: 00007fffca8ede40 R08: 00007fffca8eda10 R09: 0000000000000000
[  456.896137] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  456.896214] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055da98f92b68
[  456.896292]  </TASK>
[  456.896340] ---[ end trace 0000000000000000 ]---
[  456.897115] ------------[ cut here ]------------
[  456.897183] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/602
[  456.897272] Modules linked in:
[  456.897330] CPU: 2 UID: 0 PID: 602 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  456.897422] Tainted: [W]=WARN
[  456.897477] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  456.897547] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  456.897611] 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
[  456.897744] RSP: 0018:ff71d8c680947d68 EFLAGS: 00010286
[  456.897808] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  456.897885] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77c00
[  456.897978] RBP: 0000000000000000 R08: ff3cc9a4c197b750 R09: ff3cc9a4c4c10030
[  456.898056] R10: ff3cc9a4c4e30118 R11: fefefefefefefeff R12: 0000000000000000
[  456.898133] R13: 0000000000000010 R14: ff3cc9a4c4e30000 R15: ff3cc9a4c2b77c00
[  456.898213] FS:  000000001fc10400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  456.898292] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  456.898362] CR2: 00007f53eeb75000 CR3: 0000000004f93006 CR4: 0000000000771ef0
[  456.898444] PKRU: 55555554
[  456.898493] Call Trace:
[  456.898542]  <TASK>
[  456.898591]  rtmsg_ifinfo+0x3c/0xa0
[  456.898648]  register_netdevice+0x889/0x9f0
[  456.898705]  __tun_chr_ioctl+0x83c/0x16c0
[  456.898765]  ? do_sys_openat2+0x9a/0xe0
[  456.898823]  __x64_sys_ioctl+0xa1/0xe0
[  456.898882]  do_syscall_64+0x104/0xfc0
[  456.898948]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  456.899018] RIP: 0033:0x47cc8d
[  456.899075] 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
[  456.899209] RSP: 002b:00007fffc25c8670 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  456.899286] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  456.899363] RDX: 00007fffc25c86f0 RSI: 00000000400454ca RDI: 0000000000000005
[  456.899440] RBP: 00007fffc25c86c0 R08: 0000000000000000 R09: 0000000000000000
[  456.899515] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffc25c8bc8
[  456.899592] R13: 00007fffc25c8c48 R14: 0000000000000002 R15: 0000000000543540
[  456.899670]  </TASK>
[  456.899719] ---[ end trace 0000000000000000 ]---
[  456.899804] ------------[ cut here ]------------
[  456.899868] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/602
[  456.899972] Modules linked in:
[  456.900030] CPU: 2 UID: 0 PID: 602 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  456.900123] Tainted: [W]=WARN
[  456.900178] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  456.900247] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  456.900310] 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
[  456.900491] RSP: 0018:ff71d8c680947d60 EFLAGS: 00010286
[  456.900554] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  456.900630] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77c00
[  456.900708] RBP: 0000000000000002 R08: ff3cc9a4c197b750 R09: ff3cc9a4c4c10030
[  456.900784] R10: ff3cc9a4c4e30118 R11: fefefefefefefeff R12: 0000000000000000
[  456.900861] R13: 0000000000000010 R14: ff3cc9a4c4e30000 R15: ff3cc9a4c2b77c00
[  456.900947] FS:  000000001fc10400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  456.901028] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  456.901097] CR2: 00007f53eeb75000 CR3: 0000000004f93006 CR4: 0000000000771ef0
[  456.901176] PKRU: 55555554
[  456.901225] Call Trace:
[  456.901273]  <TASK>
[  456.901322]  rtnetlink_event+0x6e/0xb0
[  456.901380]  notifier_call_chain+0x6d/0x100
[  456.901438]  netdev_update_features+0x56/0x60
[  456.901504]  __tun_chr_ioctl+0xbf1/0x16c0
[  456.901562]  ? file_init_path+0x62/0x120
[  456.901621]  __x64_sys_ioctl+0xa1/0xe0
[  456.901679]  do_syscall_64+0x104/0xfc0
[  456.901737]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  456.901801] RIP: 0033:0x47cc8d
[  456.901858] 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
[  456.902009] RSP: 002b:00007fffc25c86b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  456.902090] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  456.902166] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  456.902245] RBP: 00007fffc25c8700 R08: 0000000000000000 R09: 0000000000000000
[  456.902322] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffc25c8bc8
[  456.902399] R13: 00007fffc25c8c48 R14: 0000000000000002 R15: 0000000000543540
[  456.902477]  </TASK>
[  456.902526] ---[ end trace 0000000000000000 ]---
[  456.902610] ------------[ cut here ]------------
[  456.902673] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/602
[  456.902761] Modules linked in:
[  456.902818] CPU: 2 UID: 0 PID: 602 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  456.902912] Tainted: [W]=WARN
[  456.902980] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  456.903049] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  456.903113] 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
[  456.903245] RSP: 0018:ff71d8c680947c10 EFLAGS: 00010286
[  456.903310] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  456.903387] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77c00
[  456.903464] RBP: 0000000000000000 R08: ff3cc9a4c197b750 R09: ff3cc9a4c19ba030
[  456.903541] R10: ff3cc9a4c4e30118 R11: fefefefefefefeff R12: 0000000000000000
[  456.903618] R13: 0000000000000010 R14: ff3cc9a4c4e30000 R15: ff3cc9a4c2b77c00
[  456.903698] FS:  000000001fc10400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  456.903776] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  456.903845] CR2: 00007f53eeb75000 CR3: 0000000004f93006 CR4: 0000000000771ef0
[  456.903924] PKRU: 55555554
[  456.903981] Call Trace:
[  456.904030]  <TASK>
[  456.904078]  rtmsg_ifinfo+0x3c/0xa0
[  456.904135]  __dev_notify_flags+0xb1/0xf0
[  456.904194]  netif_change_flags+0x54/0x70
[  456.904251]  dev_change_flags+0x45/0x80
[  456.904308]  devinet_ioctl+0x607/0x7f0
[  456.904368]  inet_ioctl+0x229/0x240
[  456.904425]  ? __rtnl_unlock+0x35/0x60
[  456.904482]  sock_do_ioctl+0x75/0x140
[  456.904541]  __x64_sys_ioctl+0xa1/0xe0
[  456.904599]  do_syscall_64+0x104/0xfc0
[  456.904656]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  456.904720] RIP: 0033:0x47cc8d
[  456.904777] 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
[  456.904911] RSP: 002b:00007fffc25c8690 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  456.905002] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  456.905078] RDX: 00007fffc25c8700 RSI: 0000000000008914 RDI: 0000000000000006
[  456.905156] RBP: 00007fffc25c86e0 R08: 0000000000000000 R09: 0000000000000000
[  456.905233] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffc25c8bc8
[  456.905310] R13: 00007fffc25c8c48 R14: 0000000000000002 R15: 0000000000543540
[  456.905389]  </TASK>
[  456.905437] ---[ end trace 0000000000000000 ]---
[  501.878330] ------------[ cut here ]------------
[  501.878481] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/602
[  501.878603] Modules linked in:
[  501.878666] CPU: 2 UID: 0 PID: 602 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  501.878773] Tainted: [W]=WARN
[  501.878833] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  501.878907] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  501.878988] 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
[  501.879131] RSP: 0018:ff71d8c680947b58 EFLAGS: 00010286
[  501.879196] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  501.879275] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b74800
[  501.879352] RBP: 0000000000000000 R08: ff3cc9a4c197b750 R09: ff3cc9a4c19ba030
[  501.879429] R10: ff3cc9a4c4e30118 R11: fefefefefefefeff R12: 0000000000000000
[  501.879506] R13: 0000000000000010 R14: ff3cc9a4c4e30000 R15: ff3cc9a4c2b74800
[  501.879588] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  501.879666] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  501.879737] CR2: 00007f7bd57856f0 CR3: 0000000013a42002 CR4: 0000000000771ef0
[  501.879814] PKRU: 55555554
[  501.879862] Call Trace:
[  501.879913]  <TASK>
[  501.880388]  rtmsg_ifinfo+0x3c/0xa0
[  501.880456]  netif_close_many+0xed/0x190
[  501.880514]  unregister_netdevice_many_notify+0x267/0x9d0
[  501.880578]  ? __queue_work+0x141/0x550
[  501.880637]  unregister_netdevice_queue+0x9e/0xd0
[  501.880701]  __tun_detach+0x591/0x5b0
[  501.880760]  tun_chr_close+0x3f/0xc0
[  501.880818]  __fput+0xe8/0x2c0
[  501.880878]  task_work_run+0x63/0xa0
[  501.880935]  do_exit+0x2c1/0xba0
[  501.881001]  ? ___sys_recvmsg+0xc6/0x100
[  501.881060]  do_group_exit+0x2d/0xc0
[  501.881125]  get_signal+0x82e/0x900
[  501.881184]  arch_do_signal_or_restart+0x77/0x2b0
[  501.881251]  exit_to_user_mode_loop+0x75/0x4a0
[  501.881316]  do_syscall_64+0x439/0xfc0
[  501.881374]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  501.881439] RIP: 0033:0x4c2d9e
[  501.881495] Code: Unable to access opcode bytes at 0x4c2d74.
[  501.881564] RSP: 002b:00007fffc25c8020 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  501.881642] RAX: 0000000000000050 RBX: 00007fffc25c80b0 RCX: 00000000004c2d9e
[  501.881718] RDX: 0000000000000000 RSI: 00007fffc25c80c0 RDI: 0000000000000007
[  501.881794] RBP: 00007fffc25c8030 R08: 0000000000000000 R09: 0000000000000000
[  501.881869] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffc25c80a4
[  501.881951] R13: 00007fffc25c8c48 R14: 00007fffc25c81f0 R15: 0000000000543540
[  501.882029]  </TASK>
[  501.882077] ---[ end trace 0000000000000000 ]---
[  501.882320] ------------[ cut here ]------------
[  501.882389] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/602
[  501.882474] Modules linked in:
[  501.882531] CPU: 2 UID: 0 PID: 602 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  501.882623] Tainted: [W]=WARN
[  501.882677] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  501.882747] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  501.882812] 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
[  501.882954] RSP: 0018:ff71d8c680947bc8 EFLAGS: 00010286
[  501.883018] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  501.883097] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b74800
[  501.883182] RBP: 0000000000000000 R08: ff3cc9a4c197b750 R09: ff3cc9a4c4f58830
[  501.883259] R10: ff3cc9a4c4e30118 R11: fefefefefefefeff R12: 0000000000000000
[  501.883336] R13: 0000000000000011 R14: ff3cc9a4c4e30000 R15: ff3cc9a4c2b74800
[  501.883418] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  501.883496] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  501.883565] CR2: 00007f7bd5980620 CR3: 0000000013a42002 CR4: 0000000000771ef0
[  501.883644] PKRU: 55555554
[  501.883692] Call Trace:
[  501.883741]  <TASK>
[  501.883789]  unregister_netdevice_many_notify+0x877/0x9d0
[  501.883854]  unregister_netdevice_queue+0x9e/0xd0
[  501.883918]  __tun_detach+0x591/0x5b0
[  501.884079]  tun_chr_close+0x3f/0xc0
[  501.884144]  __fput+0xe8/0x2c0
[  501.884202]  task_work_run+0x63/0xa0
[  501.884259]  do_exit+0x2c1/0xba0
[  501.884316]  ? ___sys_recvmsg+0xc6/0x100
[  501.884373]  do_group_exit+0x2d/0xc0
[  501.884430]  get_signal+0x82e/0x900
[  501.884487]  arch_do_signal_or_restart+0x77/0x2b0
[  501.884552]  exit_to_user_mode_loop+0x75/0x4a0
[  501.884617]  do_syscall_64+0x439/0xfc0
[  501.884674]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  501.884737] RIP: 0033:0x4c2d9e
[  501.884793] Code: Unable to access opcode bytes at 0x4c2d74.
[  501.884862] RSP: 002b:00007fffc25c8020 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  501.884939] RAX: 0000000000000050 RBX: 00007fffc25c80b0 RCX: 00000000004c2d9e
[  501.885022] RDX: 0000000000000000 RSI: 00007fffc25c80c0 RDI: 0000000000000007
[  501.885109] RBP: 00007fffc25c8030 R08: 0000000000000000 R09: 0000000000000000
[  501.885189] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffc25c80a4
[  501.885265] R13: 00007fffc25c8c48 R14: 00007fffc25c81f0 R15: 0000000000543540
[  501.885344]  </TASK>
[  501.885392] ---[ end trace 0000000000000000 ]---
[  501.893074] ------------[ cut here ]------------
[  501.893115] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[  501.893172] Modules linked in:
[  501.893198] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  501.893261] Tainted: [W]=WARN
[  501.893286] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  501.893322] Workqueue: netns cleanup_net
[  501.893347] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  501.893374] 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
[  501.893460] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  501.893484] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  501.893534] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b74900
[  501.893578] RBP: 0000000000000000 R08: ff3cc9a4c19211d0 R09: ff3cc9a4c6e5502c
[  501.893626] R10: ff3cc9a4c4c46118 R11: fefefefefefefeff R12: 0000000000000000
[  501.893671] R13: 0000000000000011 R14: ff3cc9a4c4c46000 R15: ff3cc9a4c2b74900
[  501.893721] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  501.893767] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  501.893802] CR2: 00007f3705987f98 CR3: 0000000013a42004 CR4: 0000000000771ef0
[  501.893845] PKRU: 55555554
[  501.893861] Call Trace:
[  501.893876]  <TASK>
[  501.893889]  unregister_netdevice_many_notify+0x877/0x9d0
[  501.893918]  default_device_exit_batch+0x318/0x390
[  501.893955]  ops_undo_list+0x10b/0x240
[  501.893977]  cleanup_net+0x1d7/0x2e0
[  501.894001]  process_one_work+0x162/0x360
[  501.894025]  worker_thread+0x16e/0x2d0
[  501.894047]  ? rescuer_thread+0x510/0x510
[  501.894071]  kthread+0xe1/0x120
[  501.894095]  ? kthread_park+0xa0/0xa0
[  501.894123]  ret_from_fork+0x16d/0x250
[  501.894146]  ? kthread_park+0xa0/0xa0
[  501.894169]  ret_from_fork_asm+0x11/0x20
[  501.894192]  </TASK>
[  501.894206] ---[ end trace 0000000000000000 ]---