[  275.070853] ------------[ cut here ]------------
[  275.070931] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/425
[  275.071030] Modules linked in:
[  275.071092] CPU: 2 UID: 0 PID: 425 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  275.071183] Tainted: [W]=WARN
[  275.071244] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  275.071316] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  275.071386] 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
[  275.071512] RSP: 0018:ff6a9ac8406ffcc8 EFLAGS: 00010286
[  275.071580] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  275.071662] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e8386fc00
[  275.071752] RBP: 0000000000000000 R08: ff48218e83948310 R09: ff48218e8113502c
[  275.071833] R10: ff48218e81da5118 R11: fefefefefefefeff R12: 0000000000000000
[  275.071912] R13: 0000000000000010 R14: ff48218e81da5000 R15: ff48218e8386fc00
[  275.072001] FS:  00007ffaa608a740(0000) GS:ff48218f0c996000(0000) knlGS:0000000000000000
[  275.072083] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  275.072156] CR2: 0000559c5ec4a008 CR3: 00000000048b5003 CR4: 0000000000771ef0
[  275.072235] PKRU: 55555554
[  275.072286] Call Trace:
[  275.072337]  <TASK>
[  275.072388]  rtmsg_ifinfo+0x3c/0xa0
[  275.072450]  register_netdevice+0x889/0x9f0
[  275.072512]  register_netdev+0x1e/0x30
[  275.072574]  loopback_net_init+0x57/0xb0
[  275.072638]  ? vsock_sysctl_init_net+0xb6/0x140
[  275.072713]  ops_init+0x68/0x140
[  275.072782]  setup_net+0x85/0x150
[  275.072845]  copy_net_ns+0xf5/0x200
[  275.072910]  create_new_namespaces+0x117/0x2f0
[  275.072986]  unshare_nsproxy_namespaces+0x85/0xb0
[  275.073053]  ksys_unshare+0x346/0x5e0
[  275.073119]  __x64_sys_unshare+0x12/0x20
[  275.073183]  do_syscall_64+0x104/0xfc0
[  275.073244]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  275.073310] RIP: 0033:0x7ffaa6185bcb
[  275.073372] 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
[  275.073498] RSP: 002b:00007fffc881b658 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  275.073581] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffaa6185bcb
[  275.073660] RDX: 0000000000000000 RSI: 00007fffc881b3c0 RDI: 0000000040000000
[  275.073745] RBP: 00007fffc881b9e0 R08: 00007fffc881b5b0 R09: 0000000000000000
[  275.073823] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  275.073903] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000559c227f6b68
[  275.073988]  </TASK>
[  275.074039] ---[ end trace 0000000000000000 ]---
[  275.074778] ------------[ cut here ]------------
[  275.074846] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  275.074933] Modules linked in:
[  275.075003] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  275.075094] Tainted: [W]=WARN
[  275.075154] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  275.075226] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  275.075295] 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
[  275.075424] RSP: 0018:ff6a9ac8406ffd68 EFLAGS: 00010286
[  275.075487] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  275.075567] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e8386fc00
[  275.075645] RBP: 0000000000000000 R08: ff48218e83b910d0 R09: ff48218e84bc3030
[  275.075730] R10: ff48218e83818118 R11: fefefefefefefeff R12: 0000000000000000
[  275.075810] R13: 0000000000000010 R14: ff48218e83818000 R15: ff48218e8386fc00
[  275.075893] FS:  0000000009402400(0000) GS:ff48218f0c996000(0000) knlGS:0000000000000000
[  275.075978] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  275.076051] CR2: 00007f938e31f000 CR3: 0000000001ce3004 CR4: 0000000000771ef0
[  275.076130] PKRU: 55555554
[  275.076180] Call Trace:
[  275.076234]  <TASK>
[  275.076287]  rtmsg_ifinfo+0x3c/0xa0
[  275.076348]  register_netdevice+0x889/0x9f0
[  275.076411]  __tun_chr_ioctl+0x83c/0x16c0
[  275.076476]  ? do_sys_openat2+0x9a/0xe0
[  275.076540]  __x64_sys_ioctl+0xa1/0xe0
[  275.076603]  do_syscall_64+0x104/0xfc0
[  275.076667]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  275.076744] RIP: 0033:0x47cc8d
[  275.076808] 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
[  275.076932] RSP: 002b:00007ffd21daba80 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  275.077021] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  275.077100] RDX: 00007ffd21dabb00 RSI: 00000000400454ca RDI: 0000000000000005
[  275.077181] RBP: 00007ffd21dabad0 R08: 0000000000000000 R09: 0000000000000000
[  275.077258] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd21dabfd8
[  275.077335] R13: 00007ffd21dac058 R14: 0000000000000002 R15: 0000000000543540
[  275.077414]  </TASK>
[  275.077464] ---[ end trace 0000000000000000 ]---
[  275.077552] ------------[ cut here ]------------
[  275.077619] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  275.077705] Modules linked in:
[  275.077775] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  275.077866] Tainted: [W]=WARN
[  275.077926] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  275.078001] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  275.078071] 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
[  275.078196] RSP: 0018:ff6a9ac8406ffd60 EFLAGS: 00010286
[  275.078263] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  275.078341] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e8386fc00
[  275.078420] RBP: 0000000000000002 R08: ff48218e83b910d0 R09: ff48218e84bc3030
[  275.078496] R10: ff48218e83818118 R11: fefefefefefefeff R12: 0000000000000000
[  275.078573] R13: 0000000000000010 R14: ff48218e83818000 R15: ff48218e8386fc00
[  275.078656] FS:  0000000009402400(0000) GS:ff48218f0c996000(0000) knlGS:0000000000000000
[  275.078743] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  275.078816] CR2: 00007f938e31f000 CR3: 0000000001ce3004 CR4: 0000000000771ef0
[  275.078897] PKRU: 55555554
[  275.078947] Call Trace:
[  275.079002]  <TASK>
[  275.079053]  rtnetlink_event+0x6e/0xb0
[  275.079114]  notifier_call_chain+0x6d/0x100
[  275.079178]  netdev_update_features+0x56/0x60
[  275.079247]  __tun_chr_ioctl+0xbf1/0x16c0
[  275.079308]  ? file_init_path+0x62/0x120
[  275.079370]  __x64_sys_ioctl+0xa1/0xe0
[  275.079431]  do_syscall_64+0x104/0xfc0
[  275.079493]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  275.079562] RIP: 0033:0x47cc8d
[  275.079624] 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
[  275.079754] RSP: 002b:00007ffd21dabac0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  275.079832] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  275.079909] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  275.079994] RBP: 00007ffd21dabb10 R08: 0000000000000005 R09: 0000000000001ff0
[  275.080072] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffd21dabfd8
[  275.080150] R13: 00007ffd21dac058 R14: 0000000000000002 R15: 0000000000543540
[  275.080229]  </TASK>
[  275.080281] ---[ end trace 0000000000000000 ]---
[  275.080366] ------------[ cut here ]------------
[  275.080434] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  275.080524] Modules linked in:
[  275.080586] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  275.080685] Tainted: [W]=WARN
[  275.080750] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  275.080825] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  275.080889] 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
[  275.081020] RSP: 0018:ff6a9ac8406ffc10 EFLAGS: 00010286
[  275.081088] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  275.081169] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e8386fc00
[  275.081247] RBP: 0000000000000000 R08: ff48218e83b910d0 R09: ff48218e81134030
[  275.081326] R10: ff48218e83818118 R11: fefefefefefefeff R12: 0000000000000000
[  275.081405] R13: 0000000000000010 R14: ff48218e83818000 R15: ff48218e8386fc00
[  275.081484] FS:  0000000009402400(0000) GS:ff48218f0c996000(0000) knlGS:0000000000000000
[  275.081564] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  275.081637] CR2: 00007f938e31f000 CR3: 0000000001ce3004 CR4: 0000000000771ef0
[  275.081716] PKRU: 55555554
[  275.081774] Call Trace:
[  275.081825]  <TASK>
[  275.081876]  rtmsg_ifinfo+0x3c/0xa0
[  275.081938]  __dev_notify_flags+0xb1/0xf0
[  275.082005]  netif_change_flags+0x54/0x70
[  275.082068]  dev_change_flags+0x45/0x80
[  275.082129]  devinet_ioctl+0x607/0x7f0
[  275.082193]  inet_ioctl+0x229/0x240
[  275.082252]  ? __rtnl_unlock+0x35/0x60
[  275.082313]  sock_do_ioctl+0x75/0x140
[  275.082377]  __x64_sys_ioctl+0xa1/0xe0
[  275.082440]  do_syscall_64+0x104/0xfc0
[  275.082501]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  275.082568] RIP: 0033:0x47cc8d
[  275.082628] 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
[  275.082758] RSP: 002b:00007ffd21dabaa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  275.082834] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  275.082910] RDX: 00007ffd21dabb10 RSI: 0000000000008914 RDI: 0000000000000006
[  275.082993] RBP: 00007ffd21dabaf0 R08: 0000000000000005 R09: 0000000000001ff0
[  275.083070] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffd21dabfd8
[  275.083150] R13: 00007ffd21dac058 R14: 0000000000000002 R15: 0000000000543540
[  275.083228]  </TASK>
[  275.083278] ---[ end trace 0000000000000000 ]---
[  320.055831] ------------[ cut here ]------------
[  320.055986] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  320.056121] Modules linked in:
[  320.056185] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.056298] Tainted: [W]=WARN
[  320.056360] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.056438] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.056514] 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
[  320.056652] RSP: 0018:ff6a9ac8406ffb58 EFLAGS: 00010286
[  320.056879] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  320.056971] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e8386fb00
[  320.057057] RBP: 0000000000000000 R08: ff48218e83b910d0 R09: ff48218e81136030
[  320.057147] R10: ff48218e83818118 R11: fefefefefefefeff R12: 0000000000000000
[  320.057232] R13: 0000000000000010 R14: ff48218e83818000 R15: ff48218e8386fb00
[  320.057317] FS:  0000000000000000(0000) GS:ff48218f0c996000(0000) knlGS:0000000000000000
[  320.057406] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.057478] CR2: 00007f938e31f000 CR3: 0000000025242005 CR4: 0000000000771ef0
[  320.057571] PKRU: 55555554
[  320.057626] Call Trace:
[  320.057683]  <TASK>
[  320.057748]  rtmsg_ifinfo+0x3c/0xa0
[  320.057815]  netif_close_many+0xed/0x190
[  320.057882]  unregister_netdevice_many_notify+0x267/0x9d0
[  320.057955]  ? __queue_work+0x141/0x550
[  320.058025]  unregister_netdevice_queue+0x9e/0xd0
[  320.058097]  __tun_detach+0x591/0x5b0
[  320.058165]  tun_chr_close+0x3f/0xc0
[  320.058232]  __fput+0xe8/0x2c0
[  320.058302]  task_work_run+0x63/0xa0
[  320.058369]  do_exit+0x2c1/0xba0
[  320.058434]  ? sysvec_reschedule_ipi+0x25/0x120
[  320.058503]  do_group_exit+0x2d/0xc0
[  320.058565]  get_signal+0x82e/0x900
[  320.058632]  arch_do_signal_or_restart+0x77/0x2b0
[  320.058704]  exit_to_user_mode_loop+0x75/0x4a0
[  320.058784]  do_syscall_64+0x439/0xfc0
[  320.058851]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.058926] RIP: 0033:0x4c2d9e
[  320.058990] Code: Unable to access opcode bytes at 0x4c2d74.
[  320.059062] RSP: 002b:00007ffd21dab430 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  320.059158] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  320.059249] RDX: 0000000000000014 RSI: 00007ffd21dab510 RDI: 0000000000000007
[  320.059329] RBP: 00007ffd21dab440 R08: 00007ffd21dab4d0 R09: 000000000000000c
[  320.059417] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd21dabfd8
[  320.059507] R13: 00007ffd21dac058 R14: 00007ffd21dab600 R15: 0000000000543540
[  320.059602]  </TASK>
[  320.059653] ---[ end trace 0000000000000000 ]---
[  320.059836] ------------[ cut here ]------------
[  320.059875] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/425
[  320.059925] Modules linked in:
[  320.059947] CPU: 3 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.060002] Tainted: [W]=WARN
[  320.060023] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.060057] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.060086] 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
[  320.060193] RSP: 0018:ff6a9ac8406ffbc8 EFLAGS: 00010286
[  320.060221] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.060262] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e8386fd00
[  320.060300] RBP: 0000000000000000 R08: ff48218e83b910d0 R09: ff48218e87a25830
[  320.060340] R10: ff48218e83818118 R11: fefefefefefefeff R12: 0000000000000000
[  320.060388] R13: 0000000000000011 R14: ff48218e83818000 R15: ff48218e8386fd00
[  320.060429] FS:  0000000000000000(0000) GS:ff48218f0ca16000(0000) knlGS:0000000000000000
[  320.060471] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.060503] CR2: 00007fe06b3d1620 CR3: 0000000004934001 CR4: 0000000000771ef0
[  320.060543] PKRU: 55555554
[  320.060557] Call Trace:
[  320.060574]  <TASK>
[  320.060588]  unregister_netdevice_many_notify+0x877/0x9d0
[  320.060616]  unregister_netdevice_queue+0x9e/0xd0
[  320.060645]  __tun_detach+0x591/0x5b0
[  320.060671]  tun_chr_close+0x3f/0xc0
[  320.060691]  __fput+0xe8/0x2c0
[  320.060713]  task_work_run+0x63/0xa0
[  320.060747]  do_exit+0x2c1/0xba0
[  320.060769]  ? sysvec_reschedule_ipi+0x25/0x120
[  320.060798]  do_group_exit+0x2d/0xc0
[  320.060819]  get_signal+0x82e/0x900
[  320.060842]  arch_do_signal_or_restart+0x77/0x2b0
[  320.060871]  exit_to_user_mode_loop+0x75/0x4a0
[  320.060898]  do_syscall_64+0x439/0xfc0
[  320.060923]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.060950] RIP: 0033:0x4c2d9e
[  320.060971] Code: Unable to access opcode bytes at 0x4c2d74.
[  320.061002] RSP: 002b:00007ffd21dab430 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  320.061046] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  320.061086] RDX: 0000000000000014 RSI: 00007ffd21dab510 RDI: 0000000000000007
[  320.061133] RBP: 00007ffd21dab440 R08: 00007ffd21dab4d0 R09: 000000000000000c
[  320.061171] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd21dabfd8
[  320.061211] R13: 00007ffd21dac058 R14: 00007ffd21dab600 R15: 0000000000543540
[  320.061251]  </TASK>
[  320.061265] ---[ end trace 0000000000000000 ]---
[  320.071861] ------------[ cut here ]------------
[  320.071903] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:1/65
[  320.071959] Modules linked in:
[  320.071981] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.072033] Tainted: [W]=WARN
[  320.072053] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.072082] Workqueue: netns cleanup_net
[  320.072117] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.072152] 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
[  320.072239] RSP: 0018:ff6a9ac84023fc78 EFLAGS: 00010286
[  320.072274] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.072313] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff48218e8386fd00
[  320.072351] RBP: 0000000000000000 R08: ff48218e83948310 R09: ff48218e87a2e02c
[  320.072401] R10: ff48218e81da5118 R11: fefefefefefefeff R12: 0000000000000000
[  320.072440] R13: 0000000000000011 R14: ff48218e81da5000 R15: ff48218e8386fd00
[  320.072482] FS:  0000000000000000(0000) GS:ff48218f0ca16000(0000) knlGS:0000000000000000
[  320.072527] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.072565] CR2: 00007f99097b9f98 CR3: 0000000025242002 CR4: 0000000000771ef0
[  320.072604] PKRU: 55555554
[  320.072619] Call Trace:
[  320.072634]  <TASK>
[  320.072647]  unregister_netdevice_many_notify+0x877/0x9d0
[  320.072675]  default_device_exit_batch+0x318/0x390
[  320.072705]  ops_undo_list+0x10b/0x240
[  320.072732]  cleanup_net+0x1d7/0x2e0
[  320.072753]  process_one_work+0x162/0x360
[  320.072776]  worker_thread+0x16e/0x2d0
[  320.072805]  ? rescuer_thread+0x510/0x510
[  320.072825]  kthread+0xe1/0x120
[  320.072846]  ? kthread_park+0xa0/0xa0
[  320.072868]  ret_from_fork+0x16d/0x250
[  320.072889]  ? kthread_park+0xa0/0xa0
[  320.072909]  ret_from_fork_asm+0x11/0x20
[  320.072936]  </TASK>
[  320.072954] ---[ end trace 0000000000000000 ]---