[  275.037628] ------------[ cut here ]------------
[  275.037682] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/426
[  275.037737] Modules linked in:
[  275.037763] CPU: 3 UID: 0 PID: 426 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  275.037815] Tainted: [W]=WARN
[  275.037838] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  275.037870] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  275.037900] 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
[  275.038004] RSP: 0018:ff71d8c6806efcc8 EFLAGS: 00010286
[  275.038035] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  275.038073] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d500
[  275.038114] RBP: 0000000000000000 R08: ff3cc9a4c329d010 R09: ff3cc9a4c4cf502c
[  275.038156] R10: ff3cc9a4c2957118 R11: fefefefefefefeff R12: 0000000000000000
[  275.038198] R13: 0000000000000010 R14: ff3cc9a4c2957000 R15: ff3cc9a4c2b5d500
[  275.038248] FS:  00007fbde7b9d740(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  275.038291] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  275.038325] CR2: 0000558d58355008 CR3: 0000000004dcc006 CR4: 0000000000771ef0
[  275.038366] PKRU: 55555554
[  275.038380] Call Trace:
[  275.038404]  <TASK>
[  275.038419]  rtmsg_ifinfo+0x3c/0xa0
[  275.038440]  register_netdevice+0x889/0x9f0
[  275.038462]  register_netdev+0x1e/0x30
[  275.038485]  loopback_net_init+0x57/0xb0
[  275.038510]  ? vsock_sysctl_init_net+0xb6/0x140
[  275.038540]  ops_init+0x68/0x140
[  275.038562]  setup_net+0x85/0x150
[  275.038585]  copy_net_ns+0xf5/0x200
[  275.038605]  create_new_namespaces+0x117/0x2f0
[  275.038632]  unshare_nsproxy_namespaces+0x85/0xb0
[  275.038661]  ksys_unshare+0x346/0x5e0
[  275.038685]  __x64_sys_unshare+0x12/0x20
[  275.038706]  do_syscall_64+0x104/0xfc0
[  275.038728]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  275.038758] RIP: 0033:0x7fbde7c98bcb
[  275.038781] 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
[  275.038879] RSP: 002b:00007ffe51c48938 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  275.038917] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbde7c98bcb
[  275.038960] RDX: 0000000000000000 RSI: 00007ffe51c486a0 RDI: 0000000040000000
[  275.039000] RBP: 00007ffe51c48cc0 R08: 00007ffe51c48890 R09: 0000000000000000
[  275.039042] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  275.039083] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000558d226edb68
[  275.039125]  </TASK>
[  275.039140] ---[ end trace 0000000000000000 ]---
[  275.039768] ------------[ cut here ]------------
[  275.039799] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/426
[  275.039857] Modules linked in:
[  275.039878] CPU: 3 UID: 0 PID: 426 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  275.039933] Tainted: [W]=WARN
[  275.039958] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  275.039993] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  275.040022] 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
[  275.040111] RSP: 0018:ff71d8c6806efd68 EFLAGS: 00010286
[  275.040139] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  275.040177] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d500
[  275.040218] RBP: 0000000000000000 R08: ff3cc9a4c320db90 R09: ff3cc9a4c19bb030
[  275.040260] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  275.040301] R13: 0000000000000010 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c2b5d500
[  275.040345] FS:  000000003c96a400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  275.040393] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  275.040429] CR2: 00007f5be66ee000 CR3: 00000000033e1001 CR4: 0000000000771ef0
[  275.040473] PKRU: 55555554
[  275.040487] Call Trace:
[  275.040498]  <TASK>
[  275.040512]  rtmsg_ifinfo+0x3c/0xa0
[  275.040532]  register_netdevice+0x889/0x9f0
[  275.040551]  __tun_chr_ioctl+0x83c/0x16c0
[  275.040575]  ? do_sys_openat2+0x9a/0xe0
[  275.040595]  __x64_sys_ioctl+0xa1/0xe0
[  275.040620]  do_syscall_64+0x104/0xfc0
[  275.040644]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  275.040672] RIP: 0033:0x47cc8d
[  275.040691] 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
[  275.040785] RSP: 002b:00007ffea5999560 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  275.040833] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  275.040873] RDX: 00007ffea59995e0 RSI: 00000000400454ca RDI: 0000000000000005
[  275.040914] RBP: 00007ffea59995b0 R08: 0000000000000000 R09: 0000000000000000
[  275.040960] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffea5999ab8
[  275.041001] R13: 00007ffea5999b38 R14: 0000000000000002 R15: 0000000000543540
[  275.041042]  </TASK>
[  275.041056] ---[ end trace 0000000000000000 ]---
[  275.041096] ------------[ cut here ]------------
[  275.041124] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/426
[  275.041174] Modules linked in:
[  275.041198] CPU: 3 UID: 0 PID: 426 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  275.041254] Tainted: [W]=WARN
[  275.041275] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  275.041311] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  275.041335] 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
[  275.041435] RSP: 0018:ff71d8c6806efd60 EFLAGS: 00010286
[  275.041463] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  275.041501] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d500
[  275.041540] RBP: 0000000000000002 R08: ff3cc9a4c320db90 R09: ff3cc9a4c19bb030
[  275.041579] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  275.041620] R13: 0000000000000010 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c2b5d500
[  275.041663] FS:  000000003c96a400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  275.041706] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  275.041735] CR2: 00007f5be66ee000 CR3: 00000000033e1001 CR4: 0000000000771ef0
[  275.041779] PKRU: 55555554
[  275.041793] Call Trace:
[  275.041823]  <TASK>
[  275.041835]  rtnetlink_event+0x6e/0xb0
[  275.041855]  notifier_call_chain+0x6d/0x100
[  275.041878]  netdev_update_features+0x56/0x60
[  275.041902]  __tun_chr_ioctl+0xbf1/0x16c0
[  275.041922]  ? file_init_path+0x62/0x120
[  275.041948]  __x64_sys_ioctl+0xa1/0xe0
[  275.041968]  do_syscall_64+0x104/0xfc0
[  275.041990]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  275.042015] RIP: 0033:0x47cc8d
[  275.042035] 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
[  275.042128] RSP: 002b:00007ffea59995a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  275.042176] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  275.042217] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  275.042258] RBP: 00007ffea59995f0 R08: 0000000000000000 R09: 0000000000000000
[  275.042301] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffea5999ab8
[  275.042339] R13: 00007ffea5999b38 R14: 0000000000000002 R15: 0000000000543540
[  275.042382]  </TASK>
[  275.042399] ---[ end trace 0000000000000000 ]---
[  275.042441] ------------[ cut here ]------------
[  275.042469] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/426
[  275.042519] Modules linked in:
[  275.042538] CPU: 3 UID: 0 PID: 426 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  275.042591] Tainted: [W]=WARN
[  275.042610] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  275.042646] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  275.042675] 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
[  275.042767] RSP: 0018:ff71d8c6806efc10 EFLAGS: 00010286
[  275.042794] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  275.042835] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d500
[  275.042884] RBP: 0000000000000000 R08: ff3cc9a4c320db90 R09: ff3cc9a4c2956030
[  275.042924] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  275.042966] R13: 0000000000000010 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c2b5d500
[  275.043011] FS:  000000003c96a400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  275.043051] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  275.043086] CR2: 00007f5be66ee000 CR3: 00000000033e1001 CR4: 0000000000771ef0
[  275.043127] PKRU: 55555554
[  275.043141] Call Trace:
[  275.043155]  <TASK>
[  275.043169]  rtmsg_ifinfo+0x3c/0xa0
[  275.043191]  __dev_notify_flags+0xb1/0xf0
[  275.043214]  netif_change_flags+0x54/0x70
[  275.043237]  dev_change_flags+0x45/0x80
[  275.043259]  devinet_ioctl+0x607/0x7f0
[  275.043282]  inet_ioctl+0x229/0x240
[  275.043303]  ? __rtnl_unlock+0x35/0x60
[  275.043325]  sock_do_ioctl+0x75/0x140
[  275.043351]  __x64_sys_ioctl+0xa1/0xe0
[  275.043372]  do_syscall_64+0x104/0xfc0
[  275.043398]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  275.043430] RIP: 0033:0x47cc8d
[  275.043449] 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
[  275.043551] RSP: 002b:00007ffea5999580 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  275.043593] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  275.043635] RDX: 00007ffea59995f0 RSI: 0000000000008914 RDI: 0000000000000006
[  275.043678] RBP: 00007ffea59995d0 R08: 0000000000000000 R09: 0000000000000000
[  275.043717] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffea5999ab8
[  275.043759] R13: 00007ffea5999b38 R14: 0000000000000002 R15: 0000000000543540
[  275.043801]  </TASK>
[  275.043816] ---[ end trace 0000000000000000 ]---
[  320.025157] ------------[ cut here ]------------
[  320.025244] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/426
[  320.025310] Modules linked in:
[  320.025341] CPU: 3 UID: 0 PID: 426 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.025403] Tainted: [W]=WARN
[  320.025426] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.025462] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.025494] 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
[  320.025604] RSP: 0018:ff71d8c6806efb58 EFLAGS: 00010286
[  320.025636] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  320.025682] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30dad00
[  320.025725] RBP: 0000000000000000 R08: ff3cc9a4c320db90 R09: ff3cc9a4c2955030
[  320.025767] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  320.025809] R13: 0000000000000010 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c30dad00
[  320.025858] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  320.025906] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.025946] CR2: 00007f5be66ee000 CR3: 0000000013a42002 CR4: 0000000000771ef0
[  320.025993] PKRU: 55555554
[  320.026008] Call Trace:
[  320.026023]  <TASK>
[  320.026040]  rtmsg_ifinfo+0x3c/0xa0
[  320.026062]  netif_close_many+0xed/0x190
[  320.026087]  unregister_netdevice_many_notify+0x267/0x9d0
[  320.026117]  ? __queue_work+0x141/0x550
[  320.026140]  unregister_netdevice_queue+0x9e/0xd0
[  320.026170]  __tun_detach+0x591/0x5b0
[  320.026197]  tun_chr_close+0x3f/0xc0
[  320.026219]  __fput+0xe8/0x2c0
[  320.026245]  task_work_run+0x63/0xa0
[  320.026266]  do_exit+0x2c1/0xba0
[  320.026292]  ? netlink_unicast+0x273/0x3a0
[  320.026314]  do_group_exit+0x2d/0xc0
[  320.026335]  get_signal+0x82e/0x900
[  320.026359]  arch_do_signal_or_restart+0x77/0x2b0
[  320.026395]  exit_to_user_mode_loop+0x75/0x4a0
[  320.026427]  do_syscall_64+0x439/0xfc0
[  320.026454]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.026483] RIP: 0033:0x4c2d9e
[  320.026508] Code: Unable to access opcode bytes at 0x4c2d74.
[  320.026546] RSP: 002b:00007ffea5998f10 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  320.026587] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  320.026626] RDX: 0000000000000014 RSI: 00007ffea5998ff0 RDI: 0000000000000007
[  320.026668] RBP: 00007ffea5998f20 R08: 00007ffea5998fb0 R09: 000000000000000c
[  320.026707] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffea5999ab8
[  320.026752] R13: 00007ffea5999b38 R14: 00007ffea59990e0 R15: 0000000000543540
[  320.026794]  </TASK>
[  320.026808] ---[ end trace 0000000000000000 ]---
[  320.026919] ------------[ cut here ]------------
[  320.027110] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/426
[  320.027164] Modules linked in:
[  320.027185] CPU: 3 UID: 0 PID: 426 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.027253] Tainted: [W]=WARN
[  320.027275] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.027310] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.027342] 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
[  320.027444] RSP: 0018:ff71d8c6806efbc8 EFLAGS: 00010286
[  320.027473] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.027523] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30dad00
[  320.027575] RBP: 0000000000000000 R08: ff3cc9a4c320db90 R09: ff3cc9a4c6e5a830
[  320.027623] R10: ff3cc9a4c2b78118 R11: fefefefefefefeff R12: 0000000000000000
[  320.027668] R13: 0000000000000011 R14: ff3cc9a4c2b78000 R15: ff3cc9a4c30dad00
[  320.027718] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  320.027764] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.027800] CR2: 00007f5be66ee000 CR3: 0000000013a42002 CR4: 0000000000771ef0
[  320.027844] PKRU: 55555554
[  320.027859] Call Trace:
[  320.027874]  <TASK>
[  320.027888]  unregister_netdevice_many_notify+0x877/0x9d0
[  320.027916]  unregister_netdevice_queue+0x9e/0xd0
[  320.027950]  __tun_detach+0x591/0x5b0
[  320.027974]  tun_chr_close+0x3f/0xc0
[  320.027994]  __fput+0xe8/0x2c0
[  320.028018]  task_work_run+0x63/0xa0
[  320.028039]  do_exit+0x2c1/0xba0
[  320.028060]  ? netlink_unicast+0x273/0x3a0
[  320.028087]  do_group_exit+0x2d/0xc0
[  320.028109]  get_signal+0x82e/0x900
[  320.028134]  arch_do_signal_or_restart+0x77/0x2b0
[  320.028160]  exit_to_user_mode_loop+0x75/0x4a0
[  320.028191]  do_syscall_64+0x439/0xfc0
[  320.028214]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.028246] RIP: 0033:0x4c2d9e
[  320.028268] Code: Unable to access opcode bytes at 0x4c2d74.
[  320.028300] RSP: 002b:00007ffea5998f10 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  320.028341] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  320.028384] RDX: 0000000000000014 RSI: 00007ffea5998ff0 RDI: 0000000000000007
[  320.028426] RBP: 00007ffea5998f20 R08: 00007ffea5998fb0 R09: 000000000000000c
[  320.028466] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffea5999ab8
[  320.028507] R13: 00007ffea5999b38 R14: 00007ffea59990e0 R15: 0000000000543540
[  320.028552]  </TASK>
[  320.028567] ---[ end trace 0000000000000000 ]---
[  320.038065] ------------[ cut here ]------------
[  320.038103] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[  320.038164] Modules linked in:
[  320.038184] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.038243] Tainted: [W]=WARN
[  320.038266] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.038308] Workqueue: netns cleanup_net
[  320.038333] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.038362] 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
[  320.038438] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  320.038469] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.038515] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30dae00
[  320.038567] RBP: 0000000000000000 R08: ff3cc9a4c329d010 R09: ff3cc9a4c773682c
[  320.038607] R10: ff3cc9a4c2957118 R11: fefefefefefefeff R12: 0000000000000000
[  320.038648] R13: 0000000000000011 R14: ff3cc9a4c2957000 R15: ff3cc9a4c30dae00
[  320.038694] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  320.038734] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.038769] CR2: 00007fd0d651af98 CR3: 0000000013a42003 CR4: 0000000000771ef0
[  320.038810] PKRU: 55555554
[  320.038825] Call Trace:
[  320.038840]  <TASK>
[  320.038856]  unregister_netdevice_many_notify+0x877/0x9d0
[  320.038885]  default_device_exit_batch+0x318/0x390
[  320.038917]  ops_undo_list+0x10b/0x240
[  320.038946]  cleanup_net+0x1d7/0x2e0
[  320.038970]  process_one_work+0x162/0x360
[  320.038997]  worker_thread+0x16e/0x2d0
[  320.039018]  ? rescuer_thread+0x510/0x510
[  320.039039]  kthread+0xe1/0x120
[  320.039062]  ? kthread_park+0xa0/0xa0
[  320.039085]  ret_from_fork+0x16d/0x250
[  320.039110]  ? kthread_park+0xa0/0xa0
[  320.039134]  ret_from_fork_asm+0x11/0x20
[  320.039160]  </TASK>
[  320.039175] ---[ end trace 0000000000000000 ]---