[  229.576138] ------------[ cut here ]------------
[  229.576222] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/382
[  229.576317] Modules linked in:
[  229.576373] CPU: 2 UID: 0 PID: 382 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  229.576467] Tainted: [W]=WARN
[  229.576521] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.576589] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  229.576652] 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
[  229.576782] RSP: 0018:ff71d8c680657cc8 EFLAGS: 00010286
[  229.576844] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  229.576922] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[  229.577002] RBP: 0000000000000000 R08: ff3cc9a4c2bbdbd0 R09: ff3cc9a4c19bf02c
[  229.577077] R10: ff3cc9a4c19be118 R11: fefefefefefefeff R12: 0000000000000000
[  229.577154] R13: 0000000000000010 R14: ff3cc9a4c19be000 R15: ff3cc9a4c2b5d900
[  229.577235] FS:  00007f4749fb0740(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  229.577347] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.577415] CR2: 00007f474a172280 CR3: 00000000031fa003 CR4: 0000000000771ef0
[  229.577492] PKRU: 55555554
[  229.577539] Call Trace:
[  229.577588]  <TASK>
[  229.577636]  rtmsg_ifinfo+0x3c/0xa0
[  229.577693]  register_netdevice+0x889/0x9f0
[  229.577750]  register_netdev+0x1e/0x30
[  229.577805]  loopback_net_init+0x57/0xb0
[  229.577863]  ? vsock_sysctl_init_net+0xb6/0x140
[  229.577927]  ops_init+0x68/0x140
[  229.577990]  setup_net+0x85/0x150
[  229.578047]  copy_net_ns+0xf5/0x200
[  229.578103]  create_new_namespaces+0x117/0x2f0
[  229.578169]  unshare_nsproxy_namespaces+0x85/0xb0
[  229.578232]  ksys_unshare+0x346/0x5e0
[  229.578294]  __x64_sys_unshare+0x12/0x20
[  229.578351]  do_syscall_64+0x104/0xfc0
[  229.578409]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  229.578472] RIP: 0033:0x7f474a0abbcb
[  229.578528] 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
[  229.578660] RSP: 002b:00007ffe0d90a8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  229.578735] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f474a0abbcb
[  229.578811] RDX: 0000000000000000 RSI: 00007ffe0d90a630 RDI: 0000000040000000
[  229.578885] RBP: 00007ffe0d90ac50 R08: 00007ffe0d90a820 R09: 0000000000000000
[  229.578968] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  229.579043] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055f137a22b68
[  229.579119]  </TASK>
[  229.579167] ---[ end trace 0000000000000000 ]---
[  229.579839] ------------[ cut here ]------------
[  229.579901] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/382
[  229.579998] Modules linked in:
[  229.580052] CPU: 2 UID: 0 PID: 382 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  229.580142] Tainted: [W]=WARN
[  229.580197] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.580271] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  229.580335] 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
[  229.580471] RSP: 0018:ff71d8c680657d68 EFLAGS: 00010286
[  229.580533] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  229.580608] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[  229.580686] RBP: 0000000000000000 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c2e5f030
[  229.580761] R10: ff3cc9a4c2b88118 R11: fefefefefefefeff R12: 0000000000000000
[  229.580837] R13: 0000000000000010 R14: ff3cc9a4c2b88000 R15: ff3cc9a4c2b5d900
[  229.580916] FS:  00000000075d6400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  229.581008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.581076] CR2: 00007f88fc9b3000 CR3: 00000000033cd004 CR4: 0000000000771ef0
[  229.581157] PKRU: 55555554
[  229.581204] Call Trace:
[  229.581258]  <TASK>
[  229.581306]  rtmsg_ifinfo+0x3c/0xa0
[  229.581362]  register_netdevice+0x889/0x9f0
[  229.581419]  __tun_chr_ioctl+0x83c/0x16c0
[  229.581478]  ? do_sys_openat2+0x9a/0xe0
[  229.581536]  __x64_sys_ioctl+0xa1/0xe0
[  229.581593]  do_syscall_64+0x104/0xfc0
[  229.581650]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  229.581714] RIP: 0033:0x47cc8d
[  229.581769] 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
[  229.581904] RSP: 002b:00007ffc4e61b300 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  229.581986] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  229.582064] RDX: 00007ffc4e61b380 RSI: 00000000400454ca RDI: 0000000000000005
[  229.582139] RBP: 00007ffc4e61b350 R08: 0000000000000000 R09: 0000000000000000
[  229.582217] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc4e61b858
[  229.582296] R13: 00007ffc4e61b8d8 R14: 0000000000000002 R15: 0000000000543540
[  229.582373]  </TASK>
[  229.582420] ---[ end trace 0000000000000000 ]---
[  229.582500] ------------[ cut here ]------------
[  229.582562] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/382
[  229.582645] Modules linked in:
[  229.582700] CPU: 2 UID: 0 PID: 382 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  229.582790] Tainted: [W]=WARN
[  229.582845] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.582912] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  229.582979] 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
[  229.583115] RSP: 0018:ff71d8c680657d60 EFLAGS: 00010286
[  229.583178] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  229.583260] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[  229.583335] RBP: 0000000000000002 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c2e5f030
[  229.583410] R10: ff3cc9a4c2b88118 R11: fefefefefefefeff R12: 0000000000000000
[  229.583485] R13: 0000000000000010 R14: ff3cc9a4c2b88000 R15: ff3cc9a4c2b5d900
[  229.583565] FS:  00000000075d6400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  229.583640] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.583708] CR2: 00007f88fc9b3000 CR3: 00000000033cd004 CR4: 0000000000771ef0
[  229.583785] PKRU: 55555554
[  229.583832] Call Trace:
[  229.583880]  <TASK>
[  229.583927]  rtnetlink_event+0x6e/0xb0
[  229.583989]  notifier_call_chain+0x6d/0x100
[  229.584046]  netdev_update_features+0x56/0x60
[  229.584112]  __tun_chr_ioctl+0xbf1/0x16c0
[  229.584168]  ? file_init_path+0x62/0x120
[  229.584225]  __x64_sys_ioctl+0xa1/0xe0
[  229.584283]  do_syscall_64+0x104/0xfc0
[  229.584340]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  229.584402] RIP: 0033:0x47cc8d
[  229.584457] 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
[  229.584591] RSP: 002b:00007ffc4e61b340 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  229.584666] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  229.584742] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  229.584819] RBP: 00007ffc4e61b390 R08: 0000000000000000 R09: 0000000000000000
[  229.584895] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc4e61b858
[  229.584976] R13: 00007ffc4e61b8d8 R14: 0000000000000002 R15: 0000000000543540
[  229.585051]  </TASK>
[  229.585098] ---[ end trace 0000000000000000 ]---
[  229.585180] ------------[ cut here ]------------
[  229.585252] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/382
[  229.585355] Modules linked in:
[  229.585412] CPU: 2 UID: 0 PID: 382 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  229.585505] Tainted: [W]=WARN
[  229.585558] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  229.585626] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  229.585688] 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
[  229.585818] RSP: 0018:ff71d8c680657c10 EFLAGS: 00010286
[  229.585880] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  229.585964] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[  229.586039] RBP: 0000000000000000 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c19bc030
[  229.586117] R10: ff3cc9a4c2b88118 R11: fefefefefefefeff R12: 0000000000000000
[  229.586194] R13: 0000000000000010 R14: ff3cc9a4c2b88000 R15: ff3cc9a4c2b5d900
[  229.586280] FS:  00000000075d6400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  229.586358] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  229.586425] CR2: 00007f88fc9b3000 CR3: 00000000033cd004 CR4: 0000000000771ef0
[  229.586502] PKRU: 55555554
[  229.586549] Call Trace:
[  229.586596]  <TASK>
[  229.586644]  rtmsg_ifinfo+0x3c/0xa0
[  229.586700]  __dev_notify_flags+0xb1/0xf0
[  229.586757]  netif_change_flags+0x54/0x70
[  229.586813]  dev_change_flags+0x45/0x80
[  229.586869]  devinet_ioctl+0x607/0x7f0
[  229.586928]  inet_ioctl+0x229/0x240
[  229.586989]  ? __rtnl_unlock+0x35/0x60
[  229.587045]  sock_do_ioctl+0x75/0x140
[  229.587102]  __x64_sys_ioctl+0xa1/0xe0
[  229.587159]  do_syscall_64+0x104/0xfc0
[  229.587214]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  229.587282] RIP: 0033:0x47cc8d
[  229.587337] 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
[  229.587469] RSP: 002b:00007ffc4e61b320 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  229.587545] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  229.587621] RDX: 00007ffc4e61b390 RSI: 0000000000008914 RDI: 0000000000000006
[  229.587697] RBP: 00007ffc4e61b370 R08: 0000000000000000 R09: 0000000000000000
[  229.587772] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc4e61b858
[  229.587847] R13: 00007ffc4e61b8d8 R14: 0000000000000002 R15: 0000000000543540
[  229.587924]  </TASK>
[  229.587974] ---[ end trace 0000000000000000 ]---
[  274.563262] ------------[ cut here ]------------
[  274.563384] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/382
[  274.563492] Modules linked in:
[  274.563554] CPU: 2 UID: 0 PID: 382 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  274.563645] Tainted: [W]=WARN
[  274.563700] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  274.563769] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  274.563834] 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
[  274.563975] RSP: 0018:ff71d8c680657b58 EFLAGS: 00010286
[  274.564038] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  274.564115] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c18a0c00
[  274.564193] RBP: 0000000000000000 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c19bc030
[  274.564270] R10: ff3cc9a4c2b88118 R11: fefefefefefefeff R12: 0000000000000000
[  274.564348] R13: 0000000000000010 R14: ff3cc9a4c2b88000 R15: ff3cc9a4c18a0c00
[  274.564436] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  274.564516] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  274.564588] CR2: 00007fff584eef80 CR3: 00000000033ef005 CR4: 0000000000771ef0
[  274.564667] PKRU: 55555554
[  274.564715] Call Trace:
[  274.564765]  <TASK>
[  274.564815]  rtmsg_ifinfo+0x3c/0xa0
[  274.564872]  netif_close_many+0xed/0x190
[  274.564930]  unregister_netdevice_many_notify+0x267/0x9d0
[  274.565376]  ? __queue_work+0x141/0x550
[  274.565448]  unregister_netdevice_queue+0x9e/0xd0
[  274.565513]  __tun_detach+0x591/0x5b0
[  274.565574]  tun_chr_close+0x3f/0xc0
[  274.565631]  __fput+0xe8/0x2c0
[  274.565691]  task_work_run+0x63/0xa0
[  274.565751]  do_exit+0x2c1/0xba0
[  274.565810]  do_group_exit+0x2d/0xc0
[  274.565868]  get_signal+0x82e/0x900
[  274.565927]  arch_do_signal_or_restart+0x77/0x2b0
[  274.565999]  exit_to_user_mode_loop+0x75/0x4a0
[  274.566066]  do_syscall_64+0x439/0xfc0
[  274.566127]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  274.566192] RIP: 0033:0x4c2d9e
[  274.566250] Code: Unable to access opcode bytes at 0x4c2d74.
[  274.566320] RSP: 002b:00007ffc4e61acb0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  274.566404] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[  274.566482] RDX: 0000000000000014 RSI: 00007ffc4e61ad90 RDI: 0000000000000007
[  274.566559] RBP: 00007ffc4e61acc0 R08: 00007ffc4e61ad50 R09: 000000000000000c
[  274.566636] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000075deb10
[  274.566713] R13: 00007ffc4e61b8d8 R14: 00007ffc4e61ae80 R15: 0000000000543540
[  274.566790]  </TASK>
[  274.566839] ---[ end trace 0000000000000000 ]---
[  274.566992] ------------[ cut here ]------------
[  274.567031] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/382
[  274.567094] Modules linked in:
[  274.567119] CPU: 3 UID: 0 PID: 382 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  274.567180] Tainted: [W]=WARN
[  274.567204] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  274.567241] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  274.567271] 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
[  274.567373] RSP: 0018:ff71d8c680657bc8 EFLAGS: 00010286
[  274.567409] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  274.567455] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d500
[  274.567501] RBP: 0000000000000000 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c6cee030
[  274.567540] R10: ff3cc9a4c2b88118 R11: fefefefefefefeff R12: 0000000000000000
[  274.567584] R13: 0000000000000011 R14: ff3cc9a4c2b88000 R15: ff3cc9a4c2b5d500
[  274.567627] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  274.567673] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  274.567712] CR2: 00007fbbd785b620 CR3: 0000000013a42001 CR4: 0000000000771ef0
[  274.567760] PKRU: 55555554
[  274.567776] Call Trace:
[  274.567792]  <TASK>
[  274.567809]  unregister_netdevice_many_notify+0x877/0x9d0
[  274.567836]  unregister_netdevice_queue+0x9e/0xd0
[  274.567867]  __tun_detach+0x591/0x5b0
[  274.567892]  tun_chr_close+0x3f/0xc0
[  274.567915]  __fput+0xe8/0x2c0
[  274.567946]  task_work_run+0x63/0xa0
[  274.567970]  do_exit+0x2c1/0xba0
[  274.567996]  do_group_exit+0x2d/0xc0
[  274.568026]  get_signal+0x82e/0x900
[  274.568053]  arch_do_signal_or_restart+0x77/0x2b0
[  274.568084]  exit_to_user_mode_loop+0x75/0x4a0
[  274.568120]  do_syscall_64+0x439/0xfc0
[  274.568145]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  274.568175] RIP: 0033:0x4c2d9e
[  274.568197] Code: Unable to access opcode bytes at 0x4c2d74.
[  274.568236] RSP: 002b:00007ffc4e61acb0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  274.568279] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[  274.568336] RDX: 0000000000000014 RSI: 00007ffc4e61ad90 RDI: 0000000000000007
[  274.568385] RBP: 00007ffc4e61acc0 R08: 00007ffc4e61ad50 R09: 000000000000000c
[  274.568436] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000075deb10
[  274.568480] R13: 00007ffc4e61b8d8 R14: 00007ffc4e61ae80 R15: 0000000000543540
[  274.568525]  </TASK>
[  274.568541] ---[ end trace 0000000000000000 ]---
[  274.577057] ------------[ cut here ]------------
[  274.577101] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[  274.577166] Modules linked in:
[  274.577191] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  274.577249] Tainted: [W]=WARN
[  274.577271] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  274.577306] Workqueue: netns cleanup_net
[  274.577331] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  274.577359] 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
[  274.577467] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  274.577495] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  274.577540] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5dc00
[  274.577584] RBP: 0000000000000000 R08: ff3cc9a4c2bbdbd0 R09: ff3cc9a4c6cef82c
[  274.577624] R10: ff3cc9a4c19be118 R11: fefefefefefefeff R12: 0000000000000000
[  274.577665] R13: 0000000000000011 R14: ff3cc9a4c19be000 R15: ff3cc9a4c2b5dc00
[  274.577709] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  274.577755] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  274.577794] CR2: 00007f6beb504f98 CR3: 0000000013a42006 CR4: 0000000000771ef0
[  274.577836] PKRU: 55555554
[  274.577852] Call Trace:
[  274.577865]  <TASK>
[  274.577881]  unregister_netdevice_many_notify+0x877/0x9d0
[  274.577912]  default_device_exit_batch+0x318/0x390
[  274.577946]  ops_undo_list+0x10b/0x240
[  274.577970]  cleanup_net+0x1d7/0x2e0
[  274.577994]  process_one_work+0x162/0x360
[  274.578018]  worker_thread+0x16e/0x2d0
[  274.578044]  ? rescuer_thread+0x510/0x510
[  274.578069]  kthread+0xe1/0x120
[  274.578093]  ? kthread_park+0xa0/0xa0
[  274.578116]  ret_from_fork+0x16d/0x250
[  274.578139]  ? kthread_park+0xa0/0xa0
[  274.578159]  ret_from_fork_asm+0x11/0x20
[  274.578180]  </TASK>
[  274.578194] ---[ end trace 0000000000000000 ]---