[  320.500312] ------------[ cut here ]------------
[  320.500398] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/470
[  320.500488] Modules linked in:
[  320.500552] CPU: 2 UID: 0 PID: 470 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.500647] Tainted: [W]=WARN
[  320.500702] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.500771] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.500835] 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
[  320.500978] RSP: 0018:ff71d8c680777cc8 EFLAGS: 00010286
[  320.501043] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.501119] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[  320.501197] RBP: 0000000000000000 R08: ff3cc9a4c336f0d0 R09: ff3cc9a4c4cf602c
[  320.501273] R10: ff3cc9a4c19be118 R11: fefefefefefefeff R12: 0000000000000000
[  320.501350] R13: 0000000000000010 R14: ff3cc9a4c19be000 R15: ff3cc9a4c2b5d900
[  320.501431] FS:  00007f4f58549740(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  320.501510] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.501586] CR2: 000055da1bb05008 CR3: 0000000006925003 CR4: 0000000000771ef0
[  320.501665] PKRU: 55555554
[  320.501713] Call Trace:
[  320.501763]  <TASK>
[  320.501812]  rtmsg_ifinfo+0x3c/0xa0
[  320.501870]  register_netdevice+0x889/0x9f0
[  320.501927]  register_netdev+0x1e/0x30
[  320.501989]  loopback_net_init+0x57/0xb0
[  320.502049]  ? vsock_sysctl_init_net+0xb6/0x140
[  320.502120]  ops_init+0x68/0x140
[  320.502179]  setup_net+0x85/0x150
[  320.502236]  copy_net_ns+0xf5/0x200
[  320.502294]  create_new_namespaces+0x117/0x2f0
[  320.502360]  unshare_nsproxy_namespaces+0x85/0xb0
[  320.502424]  ksys_unshare+0x346/0x5e0
[  320.502483]  __x64_sys_unshare+0x12/0x20
[  320.502547]  do_syscall_64+0x104/0xfc0
[  320.502606]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.502671] RIP: 0033:0x7f4f58644bcb
[  320.502728] 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
[  320.502860] RSP: 002b:00007fff9bc2dac8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  320.502938] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4f58644bcb
[  320.503022] RDX: 0000000000000000 RSI: 00007fff9bc2d830 RDI: 0000000040000000
[  320.503100] RBP: 00007fff9bc2de50 R08: 00007fff9bc2da20 R09: 0000000000000000
[  320.503177] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  320.503255] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055d9fea28b68
[  320.503332]  </TASK>
[  320.503380] ---[ end trace 0000000000000000 ]---
[  320.504096] ------------[ cut here ]------------
[  320.504160] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/470
[  320.504249] Modules linked in:
[  320.504307] CPU: 2 UID: 0 PID: 470 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.504398] Tainted: [W]=WARN
[  320.504452] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.504521] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.504590] 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
[  320.504722] RSP: 0018:ff71d8c680777d68 EFLAGS: 00010286
[  320.504785] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.504861] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[  320.504938] RBP: 0000000000000000 R08: ff3cc9a4c32a3750 R09: ff3cc9a4c19ba030
[  320.505022] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  320.505100] R13: 0000000000000010 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c2b5d900
[  320.505181] FS:  0000000005223400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  320.505259] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.505328] CR2: 00007f464750a000 CR3: 0000000003303004 CR4: 0000000000771ef0
[  320.505406] PKRU: 55555554
[  320.505454] Call Trace:
[  320.505502]  <TASK>
[  320.505558]  rtmsg_ifinfo+0x3c/0xa0
[  320.505615]  register_netdevice+0x889/0x9f0
[  320.505672]  __tun_chr_ioctl+0x83c/0x16c0
[  320.505731]  ? do_sys_openat2+0x9a/0xe0
[  320.505789]  __x64_sys_ioctl+0xa1/0xe0
[  320.505848]  do_syscall_64+0x104/0xfc0
[  320.505905]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.505973] RIP: 0033:0x47cc8d
[  320.506029] 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
[  320.506160] RSP: 002b:00007ffc456bdda0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.506237] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.506314] RDX: 00007ffc456bde20 RSI: 00000000400454ca RDI: 0000000000000005
[  320.506389] RBP: 00007ffc456bddf0 R08: 0000000000000000 R09: 0000000000000000
[  320.506466] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc456be2f8
[  320.506549] R13: 00007ffc456be378 R14: 0000000000000002 R15: 0000000000543540
[  320.506628]  </TASK>
[  320.506676] ---[ end trace 0000000000000000 ]---
[  320.506758] ------------[ cut here ]------------
[  320.506820] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/470
[  320.506904] Modules linked in:
[  320.506967] CPU: 2 UID: 0 PID: 470 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.507057] Tainted: [W]=WARN
[  320.507112] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.507182] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.507245] 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
[  320.507380] RSP: 0018:ff71d8c680777d60 EFLAGS: 00010286
[  320.507443] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  320.507520] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[  320.507603] RBP: 0000000000000002 R08: ff3cc9a4c32a3750 R09: ff3cc9a4c19ba030
[  320.507679] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  320.507755] R13: 0000000000000010 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c2b5d900
[  320.507834] FS:  0000000005223400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  320.507913] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.507987] CR2: 00007f464750a000 CR3: 0000000003303004 CR4: 0000000000771ef0
[  320.508087] PKRU: 55555554
[  320.508142] Call Trace:
[  320.508192]  <TASK>
[  320.508245]  rtnetlink_event+0x6e/0xb0
[  320.508302]  notifier_call_chain+0x6d/0x100
[  320.508361]  netdev_update_features+0x56/0x60
[  320.508426]  __tun_chr_ioctl+0xbf1/0x16c0
[  320.508483]  ? file_init_path+0x62/0x120
[  320.508546]  __x64_sys_ioctl+0xa1/0xe0
[  320.508604]  do_syscall_64+0x104/0xfc0
[  320.508661]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.508724] RIP: 0033:0x47cc8d
[  320.508780] 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
[  320.508911] RSP: 002b:00007ffc456bdde0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.508994] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.509071] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  320.509147] RBP: 00007ffc456bde30 R08: 0000000000000005 R09: 0000000000000730
[  320.509226] R10: 0000000000000002 R11: 0000000000000246 R12: 00007ffc456be2f8
[  320.509305] R13: 00007ffc456be378 R14: 0000000000000002 R15: 0000000000543540
[  320.509385]  </TASK>
[  320.509432] ---[ end trace 0000000000000000 ]---
[  320.509516] ------------[ cut here ]------------
[  320.509584] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/470
[  320.509669] Modules linked in:
[  320.509724] CPU: 2 UID: 0 PID: 470 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.509816] Tainted: [W]=WARN
[  320.509870] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.509938] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.510009] 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
[  320.510145] RSP: 0018:ff71d8c680777c10 EFLAGS: 00010286
[  320.510209] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  320.510285] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[  320.510364] RBP: 0000000000000000 R08: ff3cc9a4c32a3750 R09: ff3cc9a4c4c13030
[  320.510441] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  320.510521] R13: 0000000000000010 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c2b5d900
[  320.510607] FS:  0000000005223400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  320.510686] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.510755] CR2: 00007f464750a000 CR3: 0000000003303004 CR4: 0000000000771ef0
[  320.510832] PKRU: 55555554
[  320.510880] Call Trace:
[  320.510928]  <TASK>
[  320.510982]  rtmsg_ifinfo+0x3c/0xa0
[  320.511039]  __dev_notify_flags+0xb1/0xf0
[  320.511096]  netif_change_flags+0x54/0x70
[  320.511154]  dev_change_flags+0x45/0x80
[  320.511211]  devinet_ioctl+0x607/0x7f0
[  320.511270]  inet_ioctl+0x229/0x240
[  320.511328]  ? __rtnl_unlock+0x35/0x60
[  320.511384]  sock_do_ioctl+0x75/0x140
[  320.511444]  __x64_sys_ioctl+0xa1/0xe0
[  320.511501]  do_syscall_64+0x104/0xfc0
[  320.511565]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.511629] RIP: 0033:0x47cc8d
[  320.511685] 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
[  320.511815] RSP: 002b:00007ffc456bddc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.511891] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.511972] RDX: 00007ffc456bde30 RSI: 0000000000008914 RDI: 0000000000000006
[  320.512049] RBP: 00007ffc456bde10 R08: 0000000000000005 R09: 0000000000000730
[  320.512124] R10: 0000000000000002 R11: 0000000000000246 R12: 00007ffc456be2f8
[  320.512201] R13: 00007ffc456be378 R14: 0000000000000002 R15: 0000000000543540
[  320.512278]  </TASK>
[  320.512326] ---[ end trace 0000000000000000 ]---
[  365.486221] ------------[ cut here ]------------
[  365.486342] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/470
[  365.486440] Modules linked in:
[  365.486498] CPU: 2 UID: 0 PID: 470 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.486588] Tainted: [W]=WARN
[  365.486643] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.486721] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.486785] 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
[  365.486920] RSP: 0018:ff71d8c680777b58 EFLAGS: 00010286
[  365.486994] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  365.487071] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d300
[  365.487147] RBP: 0000000000000000 R08: ff3cc9a4c32a3750 R09: ff3cc9a4c4c12030
[  365.487277] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  365.487402] R13: 0000000000000010 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c2b5d300
[  365.487519] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  365.487604] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.487722] CR2: 00007f464750a000 CR3: 0000000013a42005 CR4: 0000000000771ef0
[  365.487840] PKRU: 55555554
[  365.487909] Call Trace:
[  365.488431]  <TASK>
[  365.488493]  rtmsg_ifinfo+0x3c/0xa0
[  365.488552]  netif_close_many+0xed/0x190
[  365.488611]  unregister_netdevice_many_notify+0x267/0x9d0
[  365.488686]  ? __queue_work+0x141/0x550
[  365.488747]  unregister_netdevice_queue+0x9e/0xd0
[  365.488811]  __tun_detach+0x591/0x5b0
[  365.488871]  tun_chr_close+0x3f/0xc0
[  365.488928]  __fput+0xe8/0x2c0
[  365.488992]  task_work_run+0x63/0xa0
[  365.489050]  do_exit+0x2c1/0xba0
[  365.489109]  ? netlink_unicast+0x273/0x3a0
[  365.489168]  do_group_exit+0x2d/0xc0
[  365.489225]  get_signal+0x82e/0x900
[  365.489284]  arch_do_signal_or_restart+0x77/0x2b0
[  365.489351]  exit_to_user_mode_loop+0x75/0x4a0
[  365.489417]  do_syscall_64+0x439/0xfc0
[  365.489476]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  365.489542] RIP: 0033:0x4c2d9e
[  365.489599] Code: Unable to access opcode bytes at 0x4c2d74.
[  365.489671] RSP: 002b:00007ffc456bd750 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  365.489753] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  365.489832] RDX: 0000000000000014 RSI: 00007ffc456bd830 RDI: 0000000000000007
[  365.489908] RBP: 00007ffc456bd760 R08: 00007ffc456bd7f0 R09: 000000000000000c
[  365.489990] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc456be2f8
[  365.490066] R13: 00007ffc456be378 R14: 00007ffc456bd920 R15: 0000000000543540
[  365.490146]  </TASK>
[  365.490194] ---[ end trace 0000000000000000 ]---
[  365.490340] ------------[ cut here ]------------
[  365.490405] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/470
[  365.490492] Modules linked in:
[  365.490611] CPU: 2 UID: 0 PID: 470 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.490773] Tainted: [W]=WARN
[  365.490837] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.490940] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.491055] 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
[  365.491307] RSP: 0018:ff71d8c680777bc8 EFLAGS: 00010286
[  365.491393] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  365.491520] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d300
[  365.491618] RBP: 0000000000000000 R08: ff3cc9a4c32a3750 R09: ff3cc9a4c4d6e030
[  365.491741] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  365.491828] R13: 0000000000000011 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c2b5d300
[  365.491908] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  365.492038] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.492113] CR2: 00007f464750a000 CR3: 0000000013a42005 CR4: 0000000000771ef0
[  365.492216] PKRU: 55555554
[  365.492287] Call Trace:
[  365.492335]  <TASK>
[  365.492384]  unregister_netdevice_many_notify+0x877/0x9d0
[  365.492449]  unregister_netdevice_queue+0x9e/0xd0
[  365.492513]  __tun_detach+0x591/0x5b0
[  365.492571]  tun_chr_close+0x3f/0xc0
[  365.492629]  __fput+0xe8/0x2c0
[  365.492693]  task_work_run+0x63/0xa0
[  365.492752]  do_exit+0x2c1/0xba0
[  365.492809]  ? netlink_unicast+0x273/0x3a0
[  365.492867]  do_group_exit+0x2d/0xc0
[  365.492924]  get_signal+0x82e/0x900
[  365.492988]  arch_do_signal_or_restart+0x77/0x2b0
[  365.493053]  exit_to_user_mode_loop+0x75/0x4a0
[  365.493117]  do_syscall_64+0x439/0xfc0
[  365.493175]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  365.493239] RIP: 0033:0x4c2d9e
[  365.493295] Code: Unable to access opcode bytes at 0x4c2d74.
[  365.493365] RSP: 002b:00007ffc456bd750 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  365.493442] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  365.493517] RDX: 0000000000000014 RSI: 00007ffc456bd830 RDI: 0000000000000007
[  365.493594] RBP: 00007ffc456bd760 R08: 00007ffc456bd7f0 R09: 000000000000000c
[  365.493671] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc456be2f8
[  365.493754] R13: 00007ffc456be378 R14: 00007ffc456bd920 R15: 0000000000543540
[  365.493832]  </TASK>
[  365.493880] ---[ end trace 0000000000000000 ]---
[  365.501059] ------------[ cut here ]------------
[  365.501098] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[  365.501160] Modules linked in:
[  365.501188] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.501252] Tainted: [W]=WARN
[  365.501273] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.501308] Workqueue: netns cleanup_net
[  365.501335] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.501369] 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
[  365.501473] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  365.501505] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  365.501548] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77500
[  365.501594] RBP: 0000000000000000 R08: ff3cc9a4c336f0d0 R09: ff3cc9a4c6c8982c
[  365.501636] R10: ff3cc9a4c19be118 R11: fefefefefefefeff R12: 0000000000000000
[  365.501682] R13: 0000000000000011 R14: ff3cc9a4c19be000 R15: ff3cc9a4c2b77500
[  365.501735] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  365.501781] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.501818] CR2: 00007f71d2cd6f98 CR3: 0000000013a42006 CR4: 0000000000771ef0
[  365.501861] PKRU: 55555554
[  365.501877] Call Trace:
[  365.501892]  <TASK>
[  365.501906]  unregister_netdevice_many_notify+0x877/0x9d0
[  365.501935]  default_device_exit_batch+0x318/0x390
[  365.501967]  ops_undo_list+0x10b/0x240
[  365.501989]  cleanup_net+0x1d7/0x2e0
[  365.502011]  process_one_work+0x162/0x360
[  365.502036]  worker_thread+0x16e/0x2d0
[  365.502062]  ? rescuer_thread+0x510/0x510
[  365.502083]  kthread+0xe1/0x120
[  365.502104]  ? kthread_park+0xa0/0xa0
[  365.502127]  ret_from_fork+0x16d/0x250
[  365.502150]  ? kthread_park+0xa0/0xa0
[  365.502169]  ret_from_fork_asm+0x11/0x20
[  365.502194]  </TASK>
[  365.502209] ---[ end trace 0000000000000000 ]---