[  138.658126] ------------[ cut here ]------------
[  138.658180] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/293
[  138.658239] Modules linked in:
[  138.658264] CPU: 3 UID: 0 PID: 293 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.658326] Tainted: [W]=WARN
[  138.658346] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.658380] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.658410] 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
[  138.658509] RSP: 0018:ff71d8c68054fcc8 EFLAGS: 00010286
[  138.658540] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.658583] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d100
[  138.658625] RBP: 0000000000000000 R08: ff3cc9a4c2bb2910 R09: ff3cc9a4c295502c
[  138.658666] R10: ff3cc9a4c4c45118 R11: fefefefefefefeff R12: 0000000000000000
[  138.658707] R13: 0000000000000010 R14: ff3cc9a4c4c45000 R15: ff3cc9a4c2b5d100
[  138.658755] FS:  00007f3f13a40740(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  138.658802] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.658840] CR2: 00007f3f13c02280 CR3: 0000000002bc2006 CR4: 0000000000771ef0
[  138.658881] PKRU: 55555554
[  138.658897] Call Trace:
[  138.658914]  <TASK>
[  138.658936]  rtmsg_ifinfo+0x3c/0xa0
[  138.658962]  register_netdevice+0x889/0x9f0
[  138.658987]  register_netdev+0x1e/0x30
[  138.659009]  loopback_net_init+0x57/0xb0
[  138.659034]  ? vsock_sysctl_init_net+0xb6/0x140
[  138.659065]  ops_init+0x68/0x140
[  138.659091]  setup_net+0x85/0x150
[  138.659112]  copy_net_ns+0xf5/0x200
[  138.659134]  create_new_namespaces+0x117/0x2f0
[  138.659167]  unshare_nsproxy_namespaces+0x85/0xb0
[  138.659198]  ksys_unshare+0x346/0x5e0
[  138.659219]  __x64_sys_unshare+0x12/0x20
[  138.659241]  do_syscall_64+0x104/0xfc0
[  138.659266]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.659291] RIP: 0033:0x7f3f13b3bbcb
[  138.659314] 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
[  138.659416] RSP: 002b:00007ffc83196c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  138.659457] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3f13b3bbcb
[  138.659497] RDX: 0000000000000000 RSI: 00007ffc83196a00 RDI: 0000000040000000
[  138.659538] RBP: 00007ffc83197020 R08: 00007ffc83196bf0 R09: 0000000000000000
[  138.659584] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  138.659624] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055aaa3c6ab68
[  138.659665]  </TASK>
[  138.659679] ---[ end trace 0000000000000000 ]---
[  138.660299] ------------[ cut here ]------------
[  138.660329] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/293
[  138.660380] Modules linked in:
[  138.660405] CPU: 3 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.660466] Tainted: [W]=WARN
[  138.660486] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.660522] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.660554] 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
[  138.660645] RSP: 0018:ff71d8c68054fd68 EFLAGS: 00010286
[  138.660675] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.660716] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d100
[  138.660756] RBP: 0000000000000000 R08: ff3cc9a4c1808250 R09: ff3cc9a4c19be030
[  138.660798] R10: ff3cc9a4c1974118 R11: fefefefefefefeff R12: 0000000000000000
[  138.660839] R13: 0000000000000010 R14: ff3cc9a4c1974000 R15: ff3cc9a4c2b5d100
[  138.660886] FS:  0000000003cd5400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  138.660935] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.660972] CR2: 00007f8da92c1000 CR3: 0000000002ba4001 CR4: 0000000000771ef0
[  138.661012] PKRU: 55555554
[  138.661026] Call Trace:
[  138.661041]  <TASK>
[  138.661056]  rtmsg_ifinfo+0x3c/0xa0
[  138.661078]  register_netdevice+0x889/0x9f0
[  138.661102]  __tun_chr_ioctl+0x83c/0x16c0
[  138.661125]  ? do_sys_openat2+0x9a/0xe0
[  138.661151]  __x64_sys_ioctl+0xa1/0xe0
[  138.661172]  do_syscall_64+0x104/0xfc0
[  138.661195]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.661226] RIP: 0033:0x47cc8d
[  138.661251] 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
[  138.661354] RSP: 002b:00007fff781ff2e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.661399] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.661439] RDX: 00007fff781ff360 RSI: 00000000400454ca RDI: 0000000000000005
[  138.661479] RBP: 00007fff781ff330 R08: 0000000000000000 R09: 0000000000000000
[  138.661518] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff781ff838
[  138.661566] R13: 00007fff781ff8b8 R14: 0000000000000002 R15: 0000000000543540
[  138.661610]  </TASK>
[  138.661622] ---[ end trace 0000000000000000 ]---
[  138.661664] ------------[ cut here ]------------
[  138.661690] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/293
[  138.661729] Modules linked in:
[  138.661749] CPU: 3 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.661802] Tainted: [W]=WARN
[  138.661824] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.661858] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.661886] 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
[  138.661996] RSP: 0018:ff71d8c68054fd60 EFLAGS: 00010286
[  138.662026] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  138.662069] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d100
[  138.662113] RBP: 0000000000000002 R08: ff3cc9a4c1808250 R09: ff3cc9a4c19be030
[  138.662154] R10: ff3cc9a4c1974118 R11: fefefefefefefeff R12: 0000000000000000
[  138.662199] R13: 0000000000000010 R14: ff3cc9a4c1974000 R15: ff3cc9a4c2b5d100
[  138.662243] FS:  0000000003cd5400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  138.662286] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.662321] CR2: 00007f8da92c1000 CR3: 0000000002ba4001 CR4: 0000000000771ef0
[  138.662362] PKRU: 55555554
[  138.662375] Call Trace:
[  138.662386]  <TASK>
[  138.662402]  rtnetlink_event+0x6e/0xb0
[  138.662428]  notifier_call_chain+0x6d/0x100
[  138.662451]  netdev_update_features+0x56/0x60
[  138.662482]  __tun_chr_ioctl+0xbf1/0x16c0
[  138.662505]  ? file_init_path+0x62/0x120
[  138.662528]  __x64_sys_ioctl+0xa1/0xe0
[  138.662549]  do_syscall_64+0x104/0xfc0
[  138.662569]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.662597] RIP: 0033:0x47cc8d
[  138.662618] 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
[  138.662714] RSP: 002b:00007fff781ff320 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.662754] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.662793] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  138.662835] RBP: 00007fff781ff370 R08: 0000000000000000 R09: 0000000000000000
[  138.662877] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff781ff838
[  138.662918] R13: 00007fff781ff8b8 R14: 0000000000000002 R15: 0000000000543540
[  138.663060]  </TASK>
[  138.663074] ---[ end trace 0000000000000000 ]---
[  138.663115] ------------[ cut here ]------------
[  138.663141] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/293
[  138.663192] Modules linked in:
[  138.663213] CPU: 3 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.663266] Tainted: [W]=WARN
[  138.663287] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.663323] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.663351] 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
[  138.663450] RSP: 0018:ff71d8c68054fc10 EFLAGS: 00010286
[  138.663475] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  138.663521] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d100
[  138.663561] RBP: 0000000000000000 R08: ff3cc9a4c1808250 R09: ff3cc9a4c19bd030
[  138.663603] R10: ff3cc9a4c1974118 R11: fefefefefefefeff R12: 0000000000000000
[  138.663643] R13: 0000000000000010 R14: ff3cc9a4c1974000 R15: ff3cc9a4c2b5d100
[  138.663685] FS:  0000000003cd5400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  138.663726] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.663761] CR2: 00007f8da92c1000 CR3: 0000000002ba4001 CR4: 0000000000771ef0
[  138.663804] PKRU: 55555554
[  138.663817] Call Trace:
[  138.663831]  <TASK>
[  138.663846]  rtmsg_ifinfo+0x3c/0xa0
[  138.663868]  __dev_notify_flags+0xb1/0xf0
[  138.663891]  netif_change_flags+0x54/0x70
[  138.663914]  dev_change_flags+0x45/0x80
[  138.663945]  devinet_ioctl+0x607/0x7f0
[  138.663968]  inet_ioctl+0x229/0x240
[  138.663990]  ? __rtnl_unlock+0x35/0x60
[  138.664011]  sock_do_ioctl+0x75/0x140
[  138.664035]  __x64_sys_ioctl+0xa1/0xe0
[  138.664058]  do_syscall_64+0x104/0xfc0
[  138.664079]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.664104] RIP: 0033:0x47cc8d
[  138.664126] 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
[  138.664221] RSP: 002b:00007fff781ff300 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.664261] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.664300] RDX: 00007fff781ff370 RSI: 0000000000008914 RDI: 0000000000000006
[  138.664342] RBP: 00007fff781ff350 R08: 0000000000000000 R09: 0000000000000000
[  138.664378] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff781ff838
[  138.664422] R13: 00007fff781ff8b8 R14: 0000000000000002 R15: 0000000000543540
[  138.664462]  </TASK>
[  138.664476] ---[ end trace 0000000000000000 ]---
[  183.644050] ------------[ cut here ]------------
[  183.644124] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/293
[  183.644194] Modules linked in:
[  183.644225] CPU: 3 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.644279] Tainted: [W]=WARN
[  183.644304] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.644335] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.644364] 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
[  183.644465] RSP: 0018:ff71d8c68054fb58 EFLAGS: 00010286
[  183.644494] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  183.644541] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d500
[  183.644580] RBP: 0000000000000000 R08: ff3cc9a4c1808250 R09: ff3cc9a4c19bd030
[  183.644620] R10: ff3cc9a4c1974118 R11: fefefefefefefeff R12: 0000000000000000
[  183.644666] R13: 0000000000000010 R14: ff3cc9a4c1974000 R15: ff3cc9a4c2b5d500
[  183.644712] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  183.644753] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.644791] CR2: 00007f8da92c1000 CR3: 0000000013a42004 CR4: 0000000000771ef0
[  183.644834] PKRU: 55555554
[  183.644849] Call Trace:
[  183.644864]  <TASK>
[  183.644880]  rtmsg_ifinfo+0x3c/0xa0
[  183.644899]  netif_close_many+0xed/0x190
[  183.644926]  unregister_netdevice_many_notify+0x267/0x9d0
[  183.644957]  ? __queue_work+0x141/0x550
[  183.644983]  unregister_netdevice_queue+0x9e/0xd0
[  183.645013]  __tun_detach+0x591/0x5b0
[  183.645041]  tun_chr_close+0x3f/0xc0
[  183.645067]  __fput+0xe8/0x2c0
[  183.645093]  task_work_run+0x63/0xa0
[  183.645118]  do_exit+0x2c1/0xba0
[  183.645143]  ? refill_objects+0x234/0x300
[  183.645167]  do_group_exit+0x2d/0xc0
[  183.645188]  ? sk_prot_alloc.isra.0+0x87/0x100
[  183.645217]  ? cgroup_sk_alloc+0x5c/0x140
[  183.645242]  get_signal+0x82e/0x900
[  183.645267]  ? __d_alloc+0x40/0x200
[  183.645291]  ? alloc_empty_file+0x3f/0xd0
[  183.645313]  arch_do_signal_or_restart+0x77/0x2b0
[  183.645348]  ? alloc_file_pseudo+0xc1/0x110
[  183.645373]  ? __sys_socket+0xda/0x130
[  183.645393]  exit_to_user_mode_loop+0x75/0x4a0
[  183.645424]  do_syscall_64+0x439/0xfc0
[  183.645448]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.645484] RIP: 0033:0x47ea2b
[  183.645508] Code: Unable to access opcode bytes at 0x47ea01.
[  183.645539] RSP: 002b:00007fff781fed88 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
[  183.645574] RAX: 0000000000000007 RBX: 00007fff781fee60 RCX: 000000000047ea2b
[  183.645618] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  183.645658] RBP: 00007fff781fedc0 R08: 0000000000000041 R09: 0000000003cd63e0
[  183.645698] R10: 0000000000000040 R11: 0000000000000206 R12: 00007fff781ff838
[  183.645732] R13: 00007fff781ff8b8 R14: 00007fff781ff338 R15: 0000000000543540
[  183.645773]  </TASK>
[  183.645788] ---[ end trace 0000000000000000 ]---
[  183.645888] ------------[ cut here ]------------
[  183.645914] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/293
[  183.646645] Modules linked in:
[  183.646673] CPU: 3 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.646731] Tainted: [W]=WARN
[  183.646754] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.646790] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.646822] 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
[  183.646917] RSP: 0018:ff71d8c68054fbc8 EFLAGS: 00010286
[  183.646951] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.646997] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d500
[  183.647041] RBP: 0000000000000000 R08: ff3cc9a4c1808250 R09: ff3cc9a4c6dc6030
[  183.647085] R10: ff3cc9a4c1974118 R11: fefefefefefefeff R12: 0000000000000000
[  183.647131] R13: 0000000000000011 R14: ff3cc9a4c1974000 R15: ff3cc9a4c2b5d500
[  183.647173] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  183.647216] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.647248] CR2: 00007f8da92c1000 CR3: 0000000013a42004 CR4: 0000000000771ef0
[  183.647291] PKRU: 55555554
[  183.647308] Call Trace:
[  183.647322]  <TASK>
[  183.647336]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.647367]  unregister_netdevice_queue+0x9e/0xd0
[  183.647396]  __tun_detach+0x591/0x5b0
[  183.647418]  tun_chr_close+0x3f/0xc0
[  183.647436]  __fput+0xe8/0x2c0
[  183.647457]  task_work_run+0x63/0xa0
[  183.647477]  do_exit+0x2c1/0xba0
[  183.647500]  ? refill_objects+0x234/0x300
[  183.647527]  do_group_exit+0x2d/0xc0
[  183.647550]  ? sk_prot_alloc.isra.0+0x87/0x100
[  183.647577]  ? cgroup_sk_alloc+0x5c/0x140
[  183.647598]  get_signal+0x82e/0x900
[  183.647622]  ? __d_alloc+0x40/0x200
[  183.647641]  ? alloc_empty_file+0x3f/0xd0
[  183.647662]  arch_do_signal_or_restart+0x77/0x2b0
[  183.647693]  ? alloc_file_pseudo+0xc1/0x110
[  183.647717]  ? __sys_socket+0xda/0x130
[  183.647737]  exit_to_user_mode_loop+0x75/0x4a0
[  183.647767]  do_syscall_64+0x439/0xfc0
[  183.647789]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.647819] RIP: 0033:0x47ea2b
[  183.647839] Code: Unable to access opcode bytes at 0x47ea01.
[  183.647873] RSP: 002b:00007fff781fed88 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
[  183.647907] RAX: 0000000000000007 RBX: 00007fff781fee60 RCX: 000000000047ea2b
[  183.647949] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  183.647992] RBP: 00007fff781fedc0 R08: 0000000000000041 R09: 0000000003cd63e0
[  183.648032] R10: 0000000000000040 R11: 0000000000000206 R12: 00007fff781ff838
[  183.648073] R13: 00007fff781ff8b8 R14: 00007fff781ff338 R15: 0000000000543540
[  183.648115]  </TASK>
[  183.648129] ---[ end trace 0000000000000000 ]---
[  183.657084] ------------[ cut here ]------------
[  183.657126] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[  183.657192] Modules linked in:
[  183.657215] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.657272] Tainted: [W]=WARN
[  183.657294] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.657331] Workqueue: netns cleanup_net
[  183.657357] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.657385] 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
[  183.657485] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  183.657512] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.657551] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30daf00
[  183.657594] RBP: 0000000000000000 R08: ff3cc9a4c2bb2910 R09: ff3cc9a4c33f182c
[  183.657635] R10: ff3cc9a4c4c45118 R11: fefefefefefefeff R12: 0000000000000000
[  183.657682] R13: 0000000000000011 R14: ff3cc9a4c4c45000 R15: ff3cc9a4c30daf00
[  183.657725] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  183.657768] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.657799] CR2: 00007f9267c05f98 CR3: 0000000013a42004 CR4: 0000000000771ef0
[  183.657841] PKRU: 55555554
[  183.657856] Call Trace:
[  183.657872]  <TASK>
[  183.657888]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.657920]  default_device_exit_batch+0x318/0x390
[  183.657954]  ops_undo_list+0x10b/0x240
[  183.657979]  cleanup_net+0x1d7/0x2e0
[  183.658003]  process_one_work+0x162/0x360
[  183.658027]  worker_thread+0x16e/0x2d0
[  183.658051]  ? rescuer_thread+0x510/0x510
[  183.658072]  kthread+0xe1/0x120
[  183.658092]  ? kthread_park+0xa0/0xa0
[  183.658118]  ret_from_fork+0x16d/0x250
[  183.658145]  ? kthread_park+0xa0/0xa0
[  183.658168]  ret_from_fork_asm+0x11/0x20
[  183.658193]  </TASK>
[  183.658207] ---[ end trace 0000000000000000 ]---