[  820.602166] ------------[ cut here ]------------
[  820.602249] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/956
[  820.602336] Modules linked in:
[  820.602394] CPU: 2 UID: 0 PID: 956 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  820.602486] Tainted: [W]=WARN
[  820.602541] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  820.602611] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  820.602674] 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
[  820.602808] RSP: 0018:ff71d8c680df7cc8 EFLAGS: 00010286
[  820.602872] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  820.602956] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b4b000
[  820.603032] RBP: 0000000000000000 R08: ff3cc9a4c198d910 R09: ff3cc9a4c19bc02c
[  820.603117] R10: ff3cc9a4c4c42118 R11: fefefefefefefeff R12: 0000000000000000
[  820.603194] R13: 0000000000000010 R14: ff3cc9a4c4c42000 R15: ff3cc9a4c2b4b000
[  820.603275] FS:  00007ff2f5887740(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  820.603354] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  820.603424] CR2: 000055a0d8f41008 CR3: 000000000198e001 CR4: 0000000000771ef0
[  820.603504] PKRU: 55555554
[  820.603551] Call Trace:
[  820.603600]  <TASK>
[  820.603648]  rtmsg_ifinfo+0x3c/0xa0
[  820.603706]  register_netdevice+0x889/0x9f0
[  820.603763]  register_netdev+0x1e/0x30
[  820.603820]  loopback_net_init+0x57/0xb0
[  820.603877]  ? vsock_sysctl_init_net+0xb6/0x140
[  820.603952]  ops_init+0x68/0x140
[  820.604016]  setup_net+0x85/0x150
[  820.604079]  copy_net_ns+0xf5/0x200
[  820.604137]  create_new_namespaces+0x117/0x2f0
[  820.604202]  unshare_nsproxy_namespaces+0x85/0xb0
[  820.604265]  ksys_unshare+0x346/0x5e0
[  820.604323]  __x64_sys_unshare+0x12/0x20
[  820.604380]  do_syscall_64+0x104/0xfc0
[  820.604437]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  820.604500] RIP: 0033:0x7ff2f5982bcb
[  820.604556] 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
[  820.604688] RSP: 002b:00007ffc6f9f8ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  820.604766] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff2f5982bcb
[  820.604843] RDX: 0000000000000000 RSI: 00007ffc6f9f8c10 RDI: 0000000040000000
[  820.604920] RBP: 00007ffc6f9f9230 R08: 00007ffc6f9f8e00 R09: 0000000000000000
[  820.605005] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  820.605090] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055a0afb0cb68
[  820.605167]  </TASK>
[  820.605215] ---[ end trace 0000000000000000 ]---
[  820.605930] ------------[ cut here ]------------
[  820.605999] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/956
[  820.606091] Modules linked in:
[  820.606147] CPU: 2 UID: 0 PID: 956 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  820.606240] Tainted: [W]=WARN
[  820.606294] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  820.606363] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  820.606427] 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
[  820.606559] RSP: 0018:ff71d8c680df7d68 EFLAGS: 00010286
[  820.606623] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  820.606700] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b4b000
[  820.606777] RBP: 0000000000000000 R08: ff3cc9a4c2b840d0 R09: ff3cc9a4c19be030
[  820.606853] R10: ff3cc9a4c190c118 R11: fefefefefefefeff R12: 0000000000000000
[  820.606928] R13: 0000000000000010 R14: ff3cc9a4c190c000 R15: ff3cc9a4c2b4b000
[  820.607013] FS:  000000003a1c1400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  820.607102] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  820.607173] CR2: 00007f604d059000 CR3: 0000000004d5b002 CR4: 0000000000771ef0
[  820.607250] PKRU: 55555554
[  820.607298] Call Trace:
[  820.607346]  <TASK>
[  820.607394]  rtmsg_ifinfo+0x3c/0xa0
[  820.607451]  register_netdevice+0x889/0x9f0
[  820.607507]  __tun_chr_ioctl+0x83c/0x16c0
[  820.607565]  ? do_sys_openat2+0x9a/0xe0
[  820.607623]  __x64_sys_ioctl+0xa1/0xe0
[  820.607681]  do_syscall_64+0x104/0xfc0
[  820.607739]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  820.607802] RIP: 0033:0x47cc8d
[  820.607859] 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
[  820.607996] RSP: 002b:00007ffc46fb50c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  820.608078] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  820.608154] RDX: 00007ffc46fb5140 RSI: 00000000400454ca RDI: 0000000000000005
[  820.608231] RBP: 00007ffc46fb5110 R08: 0000000000000000 R09: 0000000000000000
[  820.608307] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc46fb5618
[  820.608383] R13: 00007ffc46fb5698 R14: 0000000000000002 R15: 0000000000543540
[  820.608464]  </TASK>
[  820.608513] ---[ end trace 0000000000000000 ]---
[  820.608594] ------------[ cut here ]------------
[  820.608657] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/956
[  820.608742] Modules linked in:
[  820.608798] CPU: 2 UID: 0 PID: 956 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  820.608890] Tainted: [W]=WARN
[  820.608951] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  820.609020] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  820.609092] 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
[  820.609224] RSP: 0018:ff71d8c680df7d60 EFLAGS: 00010286
[  820.609287] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  820.609365] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b4b000
[  820.609440] RBP: 0000000000000002 R08: ff3cc9a4c2b840d0 R09: ff3cc9a4c19be030
[  820.609515] R10: ff3cc9a4c190c118 R11: fefefefefefefeff R12: 0000000000000000
[  820.609592] R13: 0000000000000010 R14: ff3cc9a4c190c000 R15: ff3cc9a4c2b4b000
[  820.609671] FS:  000000003a1c1400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  820.609750] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  820.609819] CR2: 00007f604d059000 CR3: 0000000004d5b002 CR4: 0000000000771ef0
[  820.609896] PKRU: 55555554
[  820.609950] Call Trace:
[  820.609998]  <TASK>
[  820.610046]  rtnetlink_event+0x6e/0xb0
[  820.610107]  notifier_call_chain+0x6d/0x100
[  820.610164]  netdev_update_features+0x56/0x60
[  820.610229]  __tun_chr_ioctl+0xbf1/0x16c0
[  820.610285]  ? file_init_path+0x62/0x120
[  820.610342]  __x64_sys_ioctl+0xa1/0xe0
[  820.610398]  do_syscall_64+0x104/0xfc0
[  820.610455]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  820.610518] RIP: 0033:0x47cc8d
[  820.610574] 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
[  820.610703] RSP: 002b:00007ffc46fb5100 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  820.610780] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  820.610855] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  820.610931] RBP: 00007ffc46fb5150 R08: 0000000000000005 R09: 00000000000001f0
[  820.611011] R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffc46fb5618
[  820.611091] R13: 00007ffc46fb5698 R14: 0000000000000002 R15: 0000000000543540
[  820.611169]  </TASK>
[  820.611216] ---[ end trace 0000000000000000 ]---
[  820.611299] ------------[ cut here ]------------
[  820.611361] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/956
[  820.611446] Modules linked in:
[  820.611501] CPU: 2 UID: 0 PID: 956 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  820.611596] Tainted: [W]=WARN
[  820.611651] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  820.611719] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  820.611783] 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
[  820.611917] RSP: 0018:ff71d8c680df7c10 EFLAGS: 00010286
[  820.611987] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  820.612073] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b4b000
[  820.612149] RBP: 0000000000000000 R08: ff3cc9a4c2b840d0 R09: ff3cc9a4c19b9030
[  820.612225] R10: ff3cc9a4c190c118 R11: fefefefefefefeff R12: 0000000000000000
[  820.612301] R13: 0000000000000010 R14: ff3cc9a4c190c000 R15: ff3cc9a4c2b4b000
[  820.612381] FS:  000000003a1c1400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  820.612459] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  820.612528] CR2: 00007f604d059000 CR3: 0000000004d5b002 CR4: 0000000000771ef0
[  820.612605] PKRU: 55555554
[  820.612653] Call Trace:
[  820.612700]  <TASK>
[  820.612748]  rtmsg_ifinfo+0x3c/0xa0
[  820.612804]  __dev_notify_flags+0xb1/0xf0
[  820.612862]  netif_change_flags+0x54/0x70
[  820.612918]  dev_change_flags+0x45/0x80
[  820.612981]  devinet_ioctl+0x607/0x7f0
[  820.613040]  inet_ioctl+0x229/0x240
[  820.613101]  ? __rtnl_unlock+0x35/0x60
[  820.613158]  sock_do_ioctl+0x75/0x140
[  820.613216]  __x64_sys_ioctl+0xa1/0xe0
[  820.613274]  do_syscall_64+0x104/0xfc0
[  820.613331]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  820.613394] RIP: 0033:0x47cc8d
[  820.613450] 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
[  820.613583] RSP: 002b:00007ffc46fb50e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  820.613662] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  820.613742] RDX: 00007ffc46fb5150 RSI: 0000000000008914 RDI: 0000000000000006
[  820.613820] RBP: 00007ffc46fb5130 R08: 0000000000000005 R09: 00000000000001f0
[  820.613896] R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffc46fb5618
[  820.613980] R13: 00007ffc46fb5698 R14: 0000000000000002 R15: 0000000000543540
[  820.614069]  </TASK>
[  820.614116] ---[ end trace 0000000000000000 ]---
[  865.587077] ------------[ cut here ]------------
[  865.587257] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/956
[  865.587352] Modules linked in:
[  865.587412] CPU: 2 UID: 0 PID: 956 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  865.587508] Tainted: [W]=WARN
[  865.587562] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  865.587630] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  865.587698] 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
[  865.587838] RSP: 0018:ff71d8c680df7b58 EFLAGS: 00010286
[  865.587902] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  865.587988] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b4ae00
[  865.588066] RBP: 0000000000000000 R08: ff3cc9a4c2b840d0 R09: ff3cc9a4c19b9030
[  865.588142] R10: ff3cc9a4c190c118 R11: fefefefefefefeff R12: 0000000000000000
[  865.588225] R13: 0000000000000010 R14: ff3cc9a4c190c000 R15: ff3cc9a4c2b4ae00
[  865.588307] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  865.588386] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  865.588456] CR2: 00007f604d059000 CR3: 0000000013a42003 CR4: 0000000000771ef0
[  865.588534] PKRU: 55555554
[  865.588582] Call Trace:
[  865.588632]  <TASK>
[  865.588681]  rtmsg_ifinfo+0x3c/0xa0
[  865.588738]  netif_close_many+0xed/0x190
[  865.588797]  unregister_netdevice_many_notify+0x267/0x9d0
[  865.588862]  ? __queue_work+0x141/0x550
[  865.588922]  unregister_netdevice_queue+0x9e/0xd0
[  865.589106]  __tun_detach+0x591/0x5b0
[  865.589178]  tun_chr_close+0x3f/0xc0
[  865.589241]  __fput+0xe8/0x2c0
[  865.589301]  task_work_run+0x63/0xa0
[  865.589359]  do_exit+0x2c1/0xba0
[  865.589418]  ? netlink_recvmsg+0x18d/0x310
[  865.589476]  do_group_exit+0x2d/0xc0
[  865.589532]  get_signal+0x82e/0x900
[  865.589591]  arch_do_signal_or_restart+0x77/0x2b0
[  865.589658]  exit_to_user_mode_loop+0x75/0x4a0
[  865.589726]  do_syscall_64+0x439/0xfc0
[  865.589785]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  865.589850] RIP: 0033:0x4c2d9e
[  865.589906] Code: Unable to access opcode bytes at 0x4c2d74.
[  865.589980] RSP: 002b:00007ffc46fb4a70 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  865.590058] RAX: 0000000000000014 RBX: 00007ffc46fb4b00 RCX: 00000000004c2d9e
[  865.590133] RDX: 0000000000000000 RSI: 00007ffc46fb4b10 RDI: 0000000000000007
[  865.590215] RBP: 00007ffc46fb4a80 R08: 0000000000000000 R09: 0000000000000000
[  865.590292] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc46fb4af4
[  865.590368] R13: 0000000000000050 R14: 00007ffc46fb4c40 R15: 0000000000000000
[  865.590444]  </TASK>
[  865.590492] ---[ end trace 0000000000000000 ]---
[  865.590646] ------------[ cut here ]------------
[  865.590680] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/956
[  865.590739] Modules linked in:
[  865.590762] CPU: 0 UID: 0 PID: 956 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  865.590820] Tainted: [W]=WARN
[  865.590843] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  865.590875] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  865.590904] 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
[  865.591002] RSP: 0018:ff71d8c680df7bc8 EFLAGS: 00010286
[  865.591030] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  865.591079] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5db00
[  865.591125] RBP: 0000000000000000 R08: ff3cc9a4c2b840d0 R09: ff3cc9a4c6333030
[  865.591166] R10: ff3cc9a4c190c118 R11: fefefefefefefeff R12: 0000000000000000
[  865.591209] R13: 0000000000000011 R14: ff3cc9a4c190c000 R15: ff3cc9a4c2b5db00
[  865.591257] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  865.591299] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  865.591333] CR2: 00007f53ac7de770 CR3: 00000000032b9001 CR4: 0000000000771ef0
[  865.591378] PKRU: 55555554
[  865.591393] Call Trace:
[  865.591407]  <TASK>
[  865.591422]  unregister_netdevice_many_notify+0x877/0x9d0
[  865.591454]  unregister_netdevice_queue+0x9e/0xd0
[  865.591481]  __tun_detach+0x591/0x5b0
[  865.591503]  tun_chr_close+0x3f/0xc0
[  865.591526]  __fput+0xe8/0x2c0
[  865.591547]  task_work_run+0x63/0xa0
[  865.591568]  do_exit+0x2c1/0xba0
[  865.591591]  ? netlink_recvmsg+0x18d/0x310
[  865.591612]  do_group_exit+0x2d/0xc0
[  865.591633]  get_signal+0x82e/0x900
[  865.591656]  arch_do_signal_or_restart+0x77/0x2b0
[  865.591686]  exit_to_user_mode_loop+0x75/0x4a0
[  865.591714]  do_syscall_64+0x439/0xfc0
[  865.591737]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  865.591765] RIP: 0033:0x4c2d9e
[  865.591788] Code: Unable to access opcode bytes at 0x4c2d74.
[  865.591825] RSP: 002b:00007ffc46fb4a70 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  865.591864] RAX: 0000000000000014 RBX: 00007ffc46fb4b00 RCX: 00000000004c2d9e
[  865.591909] RDX: 0000000000000000 RSI: 00007ffc46fb4b10 RDI: 0000000000000007
[  865.591956] RBP: 00007ffc46fb4a80 R08: 0000000000000000 R09: 0000000000000000
[  865.591991] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc46fb4af4
[  865.592034] R13: 0000000000000050 R14: 00007ffc46fb4c40 R15: 0000000000000000
[  865.592074]  </TASK>
[  865.592088] ---[ end trace 0000000000000000 ]---
[  865.602061] ------------[ cut here ]------------
[  865.602099] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:1/65
[  865.602164] Modules linked in:
[  865.602190] CPU: 1 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  865.602253] Tainted: [W]=WARN
[  865.602271] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  865.602306] Workqueue: netns cleanup_net
[  865.602330] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  865.602360] 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
[  865.602458] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  865.602485] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  865.602530] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b49100
[  865.602571] RBP: 0000000000000000 R08: ff3cc9a4c198d910 R09: ff3cc9a4c633502c
[  865.602618] R10: ff3cc9a4c4c42118 R11: fefefefefefefeff R12: 0000000000000000
[  865.602663] R13: 0000000000000011 R14: ff3cc9a4c4c42000 R15: ff3cc9a4c2b49100
[  865.602716] FS:  0000000000000000(0000) GS:ff3cc9a545f16000(0000) knlGS:0000000000000000
[  865.602763] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  865.602796] CR2: 00005652f65682b8 CR3: 00000000032cb003 CR4: 0000000000771ef0
[  865.602837] PKRU: 55555554
[  865.602851] Call Trace:
[  865.602865]  <TASK>
[  865.602882]  unregister_netdevice_many_notify+0x877/0x9d0
[  865.602906]  default_device_exit_batch+0x318/0x390
[  865.602933]  ops_undo_list+0x10b/0x240
[  865.602962]  cleanup_net+0x1d7/0x2e0
[  865.602985]  process_one_work+0x162/0x360
[  865.603005]  worker_thread+0x16e/0x2d0
[  865.603028]  ? rescuer_thread+0x510/0x510
[  865.603051]  kthread+0xe1/0x120
[  865.603073]  ? kthread_park+0xa0/0xa0
[  865.603098]  ret_from_fork+0x16d/0x250
[  865.603124]  ? kthread_park+0xa0/0xa0
[  865.603146]  ret_from_fork_asm+0x11/0x20
[  865.603167]  </TASK>
[  865.603179] ---[ end trace 0000000000000000 ]---