[    3.580501] ------------[ cut here ]------------
[    3.580555] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: ip/848
[    3.580612] Modules linked in: nft_ct nf_conntrack_netlink veth nft_nat nft_numgen nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables
[    3.580703] CPU: 0 UID: 0 PID: 848 Comm: ip Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    3.580764] Tainted: [W]=WARN
[    3.580785] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.580824] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    3.580853] 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 e6 ab fb ff b9 a6 ff ff
[    3.580952] RSP: 0018:ff88a061c1097cc0 EFLAGS: 00010286
[    3.580981] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    3.581027] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff35eccd8188e900
[    3.581070] RBP: 0000000000000000 R08: ff35eccd818cf690 R09: ff35eccd8709302c
[    3.581113] R10: ff35eccd84897120 R11: fefefefefefefeff R12: 0000000000000000
[    3.581152] R13: 0000000000000010 R14: ff35eccd84897000 R15: ff35eccd8188e900
[    3.581204] FS:  00007ff080627840(0000) GS:ff35ecce32c8c000(0000) knlGS:0000000000000000
[    3.581251] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.581285] CR2: 00007ff0808317d0 CR3: 000000000cc4d004 CR4: 0000000000771ef0
[    3.581333] PKRU: 55555554
[    3.581348] Call Trace:
[    3.581364]  <TASK>
[    3.581379]  rtmsg_ifinfo+0x3c/0xa0
[    3.581402]  register_netdevice+0x889/0x9f0
[    3.581428]  register_netdev+0x1e/0x30
[    3.581452]  loopback_net_init+0x57/0xb0
[    3.581475]  ops_init+0x68/0x140
[    3.581496]  setup_net+0x85/0x150
[    3.581520]  copy_net_ns+0xf5/0x200
[    3.581543]  create_new_namespaces+0x117/0x2f0
[    3.581574]  unshare_nsproxy_namespaces+0x85/0xb0
[    3.581602]  ksys_unshare+0x346/0x5e0
[    3.581623]  __x64_sys_unshare+0x12/0x20
[    3.581650]  do_syscall_64+0xe0/0xfc0
[    3.581673]  ? exc_page_fault+0x83/0x1a0
[    3.581693]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    3.581724] RIP: 0033:0x7ff0808e9bcb
[    3.581747] 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
[    3.581832] RSP: 002b:00007ffd66680588 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
[    3.581878] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007ff0808e9bcb
[    3.581924] RDX: 0000000000000000 RSI: 0000000000477309 RDI: 0000000040000000
[    3.581967] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
[    3.582008] R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffd666827b0
[    3.582049] R13: 0000000000000001 R14: 0000000000000003 R15: 00007ffd66683890
[    3.582092]  </TASK>
[    3.582109] ---[ end trace 0000000000000000 ]---
[    3.585204] ------------[ cut here ]------------
[    3.585240] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: ip/849
[    3.585290] Modules linked in: nft_ct nf_conntrack_netlink veth nft_nat nft_numgen nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables
[    3.585372] CPU: 3 UID: 0 PID: 849 Comm: ip Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    3.585431] Tainted: [W]=WARN
[    3.585453] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.585493] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    3.585524] 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 e6 ab fb ff b9 a6 ff ff
[    3.585626] RSP: 0018:ff88a061c109f720 EFLAGS: 00010286
[    3.585658] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    3.585698] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff35eccd8188f200
[    3.585745] RBP: 0000000000000000 R08: ff35eccd818cf690 R09: ff35eccd8a74602c
[    3.585784] R10: ff35eccd84897120 R11: fefefefefefefeff R12: 0000000000000000
[    3.585826] R13: 0000000000000010 R14: ff35eccd84897000 R15: ff35eccd8188f200
[    3.585875] FS:  00007f13d9274840(0000) GS:ff35ecce32e0c000(0000) knlGS:0000000000000000
[    3.585923] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.585958] CR2: 00000000151ef988 CR3: 000000000717c003 CR4: 0000000000771ef0
[    3.586007] PKRU: 55555554
[    3.586020] Call Trace:
[    3.586033]  <TASK>
[    3.586051]  rtmsg_ifinfo+0x3c/0xa0
[    3.586077]  __dev_notify_flags+0xb1/0xf0
[    3.586098]  ? rtnl_getlink+0x456/0x5e0
[    3.586124]  netif_change_flags+0x54/0x70
[    3.586149]  do_setlink.isra.0+0x3a2/0x1500
[    3.586172]  ? __nla_validate_parse+0x76/0xf20
[    3.586202]  rtnl_newlink+0x9d3/0xd90
[    3.586228]  ? kmalloc_reserve+0xa9/0x170
[    3.586248]  ? do_setlink.isra.0+0x1500/0x1500
[    3.586276]  rtnetlink_rcv_msg+0x39f/0x460
[    3.586301]  ? netlink_unicast+0x306/0x3a0
[    3.586324]  ? rtnl_calcit.isra.0+0x160/0x160
[    3.586353]  netlink_rcv_skb+0xca/0x140
[    3.586375]  netlink_unicast+0x26b/0x3a0
[    3.586395]  netlink_sendmsg+0x1e2/0x430
[    3.586414]  ____sys_sendmsg+0x14c/0x2b0
[    3.586438]  ___sys_sendmsg+0xe1/0x120
[    3.586461]  __sys_sendmsg+0xad/0x100
[    3.586481]  do_syscall_64+0xe0/0xfc0
[    3.586504]  ? exc_page_fault+0x83/0x1a0
[    3.586526]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    3.586550] RIP: 0033:0x7f13d94ae08e
[    3.586573] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
[    3.586678] RSP: 002b:00007ffc4fb9b180 EFLAGS: 00000202 ORIG_RAX: 000000000000002e
[    3.586727] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f13d94ae08e
[    3.586774] RDX: 0000000000000000 RSI: 00007ffc4fb9b230 RDI: 0000000000000005
[    3.586819] RBP: 00007ffc4fb9b190 R08: 0000000000000000 R09: 0000000000000000
[    3.586864] R10: 0000000000000000 R11: 0000000000000202 R12: 000000006a10e202
[    3.586911] R13: 000000000049f620 R14: 0000000000000000 R15: 00007ffc4fb9b900
[    3.586955]  </TASK>
[    3.586968] ---[ end trace 0000000000000000 ]---
[    3.616091] ------------[ cut here ]------------
[    3.616135] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:0/12
[    3.616218] Modules linked in: nft_ct nf_conntrack_netlink veth nft_nat nft_numgen nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables
[    3.616304] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    3.616349] Tainted: [W]=WARN
[    3.616370] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.616407] Workqueue: netns cleanup_net
[    3.616431] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    3.616461] 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 e6 ab fb ff b9 a6 ff ff
[    3.616567] RSP: 0018:ff88a061c0067c08 EFLAGS: 00010286
[    3.616596] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[    3.616636] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff35eccd81e27300
[    3.616674] RBP: 0000000000000000 R08: ff35eccd818cf690 R09: ff35eccd84aaa02c
[    3.616717] R10: ff35eccd84897120 R11: fefefefefefefeff R12: 0000000000000000
[    3.616759] R13: 0000000000000010 R14: ff35eccd84897000 R15: ff35eccd81e27300
[    3.616802] FS:  0000000000000000(0000) GS:ff35ecce32d0c000(0000) knlGS:0000000000000000
[    3.616848] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.616893] CR2: 00007f1cbdd1e000 CR3: 000000000a657006 CR4: 0000000000771ef0
[    3.616942] PKRU: 55555554
[    3.616955] Call Trace:
[    3.616971]  <TASK>
[    3.616986]  rtmsg_ifinfo+0x3c/0xa0
[    3.617011]  netif_close_many+0xed/0x190
[    3.617030]  unregister_netdevice_many_notify+0x267/0x9d0
[    3.617061]  default_device_exit_batch+0x2f8/0x370
[    3.617092]  ops_undo_list+0x10b/0x240
[    3.617115]  cleanup_net+0x1d7/0x2e0
[    3.617136]  process_one_work+0x162/0x360
[    3.617159]  worker_thread+0x16e/0x2d0
[    3.617183]  ? rescuer_thread+0x510/0x510
[    3.617202]  kthread+0xe1/0x120
[    3.617224]  ? kthread_park+0xa0/0xa0
[    3.617245]  ret_from_fork+0x18e/0x290
[    3.617268]  ? kthread_park+0xa0/0xa0
[    3.617291]  ret_from_fork_asm+0x11/0x20
[    3.617315]  </TASK>
[    3.617329] ---[ end trace 0000000000000000 ]---
[    3.617427] ------------[ cut here ]------------
[    3.617452] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:0/12
[    3.617507] Modules linked in: nft_ct nf_conntrack_netlink veth nft_nat nft_numgen nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables
[    3.617586] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    3.617635] Tainted: [W]=WARN
[    3.617656] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.617690] Workqueue: netns cleanup_net
[    3.617709] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    3.617739] 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 e6 ab fb ff b9 a6 ff ff
[    3.617836] RSP: 0018:ff88a061c0067c78 EFLAGS: 00010286
[    3.617865] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    3.617909] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff35eccd83224500
[    3.617954] RBP: 0000000000000000 R08: ff35eccd818cf690 R09: ff35eccd8488682c
[    3.617997] R10: ff35eccd84897120 R11: fefefefefefefeff R12: 0000000000000000
[    3.618039] R13: 0000000000000011 R14: ff35eccd84897000 R15: ff35eccd83224500
[    3.618081] FS:  0000000000000000(0000) GS:ff35ecce32d0c000(0000) knlGS:0000000000000000
[    3.618125] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.618153] CR2: 00007f1cbdd1e000 CR3: 000000000a657006 CR4: 0000000000771ef0
[    3.618195] PKRU: 55555554
[    3.618209] Call Trace:
[    3.618224]  <TASK>
[    3.618239]  unregister_netdevice_many_notify+0x877/0x9d0
[    3.618267]  default_device_exit_batch+0x2f8/0x370
[    3.618290]  ops_undo_list+0x10b/0x240
[    3.618314]  cleanup_net+0x1d7/0x2e0
[    3.618335]  process_one_work+0x162/0x360
[    3.618357]  worker_thread+0x16e/0x2d0
[    3.618378]  ? rescuer_thread+0x510/0x510
[    3.618402]  kthread+0xe1/0x120
[    3.618421]  ? kthread_park+0xa0/0xa0
[    3.618445]  ret_from_fork+0x18e/0x290
[    3.618467]  ? kthread_park+0xa0/0xa0
[    3.618488]  ret_from_fork_asm+0x11/0x20
[    3.618509]  </TASK>
[    3.618524] ---[ end trace 0000000000000000 ]---