[    2.562293] ------------[ cut here ]------------
[    2.562334] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: unshare/159
[    2.562376] Modules linked in:
[    2.562399] CPU: 1 UID: 0 PID: 159 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.562436] Tainted: [W]=WARN
[    2.562448] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.562473] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.562490] 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
[    2.562543] RSP: 0018:ff722176c03dfcc8 EFLAGS: 00010286
[    2.562562] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.562583] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf1282f95200
[    2.562613] RBP: 0000000000000000 R08: ff39bf1281d95c50 R09: ff39bf128583202c
[    2.562636] R10: ff39bf12819ad118 R11: fefefefefefefeff R12: 0000000000000000
[    2.562659] R13: 0000000000000010 R14: ff39bf12819ad000 R15: ff39bf1282f95200
[    2.562687] FS:  00007fe1adf25740(0000) GS:ff39bf132df16000(0000) knlGS:0000000000000000
[    2.562713] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.562730] CR2: 00007fe1adff0820 CR3: 0000000003788003 CR4: 0000000000771ef0
[    2.562754] PKRU: 55555554
[    2.562763] Call Trace:
[    2.562776]  <TASK>
[    2.562785]  rtmsg_ifinfo+0x3c/0xa0
[    2.562799]  register_netdevice+0x889/0x9f0
[    2.562813]  register_netdev+0x1e/0x30
[    2.562828]  loopback_net_init+0x57/0xb0
[    2.562842]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.562857]  ops_init+0x68/0x140
[    2.562873]  setup_net+0x85/0x150
[    2.562885]  copy_net_ns+0xf5/0x200
[    2.562898]  create_new_namespaces+0x117/0x2f0
[    2.562914]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.562934]  ksys_unshare+0x346/0x5e0
[    2.562950]  __x64_sys_unshare+0x12/0x20
[    2.562963]  do_syscall_64+0x104/0xfc0
[    2.562979]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.562999] RIP: 0033:0x7fe1ae020bcb
[    2.563012] 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
[    2.563071] RSP: 002b:00007ffdf5516148 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.563093] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe1ae020bcb
[    2.563117] RDX: 0000000000000000 RSI: 00007ffdf5515eb0 RDI: 0000000040000000
[    2.563142] RBP: 00007ffdf55164d0 R08: 00007ffdf55160a0 R09: 0000000000000000
[    2.563168] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.563187] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000562877237b68
[    2.563213]  </TASK>
[    2.563221] ---[ end trace 0000000000000000 ]---
[    2.566296] ------------[ cut here ]------------
[    2.566356] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.566423] Modules linked in:
[    2.566473] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.566540] Tainted: [W]=WARN
[    2.566594] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.566650] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.566703] 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
[    2.566788] RSP: 0018:ff722176c03dfd68 EFLAGS: 00010286
[    2.566841] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.566900] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf1283473500
[    2.566958] RBP: 0000000000000000 R08: ff39bf128371afd0 R09: ff39bf1282d64030
[    2.567018] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[    2.567083] R13: 0000000000000010 R14: ff39bf12843ec000 R15: ff39bf1283473500
[    2.567146] FS:  0000000011c3d400(0000) GS:ff39bf132df96000(0000) knlGS:0000000000000000
[    2.567207] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.567262] CR2: 00007fc3ac20b000 CR3: 00000000037c9003 CR4: 0000000000771ef0
[    2.567324] PKRU: 55555554
[    2.567369] Call Trace:
[    2.567414]  <TASK>
[    2.567459]  rtmsg_ifinfo+0x3c/0xa0
[    2.567508]  register_netdevice+0x889/0x9f0
[    2.567558]  __tun_chr_ioctl+0x83c/0x16c0
[    2.567616]  ? do_sys_openat2+0x9a/0xe0
[    2.567668]  __x64_sys_ioctl+0xa1/0xe0
[    2.567722]  do_syscall_64+0x104/0xfc0
[    2.567773]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.567827] RIP: 0033:0x47cc8d
[    2.567876] 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
[    2.567960] RSP: 002b:00007ffcadb64cb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.568022] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.568087] RDX: 00007ffcadb64d30 RSI: 00000000400454ca RDI: 0000000000000005
[    2.568145] RBP: 00007ffcadb64d00 R08: 0000000000000000 R09: 0000000000000000
[    2.568203] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcadb65208
[    2.568263] R13: 00007ffcadb65288 R14: 0000000000000002 R15: 0000000000543540
[    2.568337]  </TASK>
[    2.568381] ---[ end trace 0000000000000000 ]---
[    2.568455] ------------[ cut here ]------------
[    2.568507] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.568571] Modules linked in:
[    2.568627] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.568695] Tainted: [W]=WARN
[    2.568742] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.568796] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.568849] 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
[    2.568936] RSP: 0018:ff722176c03dfd60 EFLAGS: 00010286
[    2.568987] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.569046] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf1283473500
[    2.569110] RBP: 0000000000000002 R08: ff39bf128371afd0 R09: ff39bf1282d64030
[    2.569169] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[    2.569228] R13: 0000000000000010 R14: ff39bf12843ec000 R15: ff39bf1283473500
[    2.569293] FS:  0000000011c3d400(0000) GS:ff39bf132df96000(0000) knlGS:0000000000000000
[    2.569356] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.569413] CR2: 00007fc3ac20b000 CR3: 00000000037c9003 CR4: 0000000000771ef0
[    2.569474] PKRU: 55555554
[    2.569519] Call Trace:
[    2.569563]  <TASK>
[    2.569614]  rtnetlink_event+0x6e/0xb0
[    2.569666]  notifier_call_chain+0x6d/0x100
[    2.569719]  netdev_update_features+0x56/0x60
[    2.569774]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.569826]  ? file_init_path+0x62/0x120
[    2.569876]  __x64_sys_ioctl+0xa1/0xe0
[    2.569927]  do_syscall_64+0x104/0xfc0
[    2.569977]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.570031] RIP: 0033:0x47cc8d
[    2.570086] 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
[    2.570171] RSP: 002b:00007ffcadb64cf0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.570229] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.570290] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.570349] RBP: 00007ffcadb64d40 R08: 0000000000000000 R09: 0000000000000000
[    2.570406] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcadb65208
[    2.570464] R13: 00007ffcadb65288 R14: 0000000000000002 R15: 0000000000543540
[    2.570523]  </TASK>
[    2.570567] ---[ end trace 0000000000000000 ]---
[    2.570649] ------------[ cut here ]------------
[    2.570700] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.570764] Modules linked in:
[    2.570813] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.570879] Tainted: [W]=WARN
[    2.570925] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.570979] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.571030] 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
[    2.571123] RSP: 0018:ff722176c03dfc10 EFLAGS: 00010286
[    2.571175] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.571233] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf1283473500
[    2.571294] RBP: 0000000000000000 R08: ff39bf128371afd0 R09: ff39bf1285835030
[    2.571352] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[    2.571410] R13: 0000000000000010 R14: ff39bf12843ec000 R15: ff39bf1283473500
[    2.571472] FS:  0000000011c3d400(0000) GS:ff39bf132df96000(0000) knlGS:0000000000000000
[    2.571533] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.571593] CR2: 00007fc3ac20b000 CR3: 00000000037c9003 CR4: 0000000000771ef0
[    2.571654] PKRU: 55555554
[    2.571699] Call Trace:
[    2.571743]  <TASK>
[    2.571788]  rtmsg_ifinfo+0x3c/0xa0
[    2.571838]  __dev_notify_flags+0xb1/0xf0
[    2.571888]  netif_change_flags+0x54/0x70
[    2.571937]  dev_change_flags+0x45/0x80
[    2.571986]  devinet_ioctl+0x607/0x7f0
[    2.572038]  inet_ioctl+0x229/0x240
[    2.572095]  ? __rtnl_unlock+0x35/0x60
[    2.572144]  sock_do_ioctl+0x75/0x140
[    2.572198]  __x64_sys_ioctl+0xa1/0xe0
[    2.572250]  do_syscall_64+0x104/0xfc0
[    2.572302]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.572355] RIP: 0033:0x47cc8d
[    2.572403] 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
[    2.572490] RSP: 002b:00007ffcadb64cd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.572549] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.572613] RDX: 00007ffcadb64d40 RSI: 0000000000008914 RDI: 0000000000000006
[    2.572673] RBP: 00007ffcadb64d20 R08: 0000000000000000 R09: 0000000000000000
[    2.572731] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcadb65208
[    2.572790] R13: 00007ffcadb65288 R14: 0000000000000002 R15: 0000000000543540
[    2.572848]  </TASK>
[    2.572892] ---[ end trace 0000000000000000 ]---
[   47.542674] ------------[ cut here ]------------
[   47.542793] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[   47.542915] Modules linked in:
[   47.542975] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.543047] Tainted: [W]=WARN
[   47.543262] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.543323] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.543379] 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
[   47.543500] RSP: 0018:ff722176c03dfb58 EFLAGS: 00010286
[   47.543553] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.543612] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf12834a6a00
[   47.543671] RBP: 0000000000000000 R08: ff39bf128371afd0 R09: ff39bf1285835030
[   47.543731] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[   47.543790] R13: 0000000000000010 R14: ff39bf12843ec000 R15: ff39bf12834a6a00
[   47.543862] FS:  0000000000000000(0000) GS:ff39bf132df96000(0000) knlGS:0000000000000000
[   47.543924] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.543980] CR2: 00007ffdbf5b9d40 CR3: 0000000037242006 CR4: 0000000000771ef0
[   47.544041] PKRU: 55555554
[   47.544092] Call Trace:
[   47.544139]  <TASK>
[   47.544185]  rtmsg_ifinfo+0x3c/0xa0
[   47.544236]  netif_close_many+0xed/0x190
[   47.544287]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.544342]  ? __queue_work+0x141/0x550
[   47.544395]  unregister_netdevice_queue+0x9e/0xd0
[   47.544448]  __tun_detach+0x591/0x5b0
[   47.544502]  tun_chr_close+0x3f/0xc0
[   47.544553]  __fput+0xe8/0x2c0
[   47.544607]  task_work_run+0x63/0xa0
[   47.544658]  do_exit+0x2c1/0xba0
[   47.544711]  ? ___sys_recvmsg+0xc6/0x100
[   47.544769]  do_group_exit+0x2d/0xc0
[   47.544826]  get_signal+0x82e/0x900
[   47.544880]  ? sysvec_reschedule_ipi+0x25/0x120
[   47.544937]  arch_do_signal_or_restart+0x77/0x2b0
[   47.544994]  exit_to_user_mode_loop+0x75/0x4a0
[   47.545051]  do_syscall_64+0x439/0xfc0
[   47.545109]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.545163] RIP: 0033:0x4c2d9e
[   47.545213] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.545269] RSP: 002b:00007ffcadb64660 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.545331] RAX: 0000000000000050 RBX: 00007ffcadb646f0 RCX: 00000000004c2d9e
[   47.545390] RDX: 0000000000000000 RSI: 00007ffcadb64700 RDI: 0000000000000007
[   47.545449] RBP: 00007ffcadb64670 R08: 0000000000000000 R09: 0000000000000000
[   47.545508] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffcadb646e4
[   47.545566] R13: 00007ffcadb65288 R14: 00007ffcadb64830 R15: 0000000000543540
[   47.545626]  </TASK>
[   47.545671] ---[ end trace 0000000000000000 ]---
[   47.545817] ------------[ cut here ]------------
[   47.545843] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.545875] Modules linked in:
[   47.545888] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.545922] Tainted: [W]=WARN
[   47.545936] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.545953] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.545969] 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
[   47.546022] RSP: 0018:ff722176c03dfbc8 EFLAGS: 00010286
[   47.546036] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.546066] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf12834aae00
[   47.546087] RBP: 0000000000000000 R08: ff39bf128371afd0 R09: ff39bf128436d030
[   47.546110] R10: ff39bf12843ec118 R11: fefefefefefefeff R12: 0000000000000000
[   47.546131] R13: 0000000000000011 R14: ff39bf12843ec000 R15: ff39bf12834aae00
[   47.546157] FS:  0000000000000000(0000) GS:ff39bf132e016000(0000) knlGS:0000000000000000
[   47.546181] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.546203] CR2: 00007f4fb4ffd9dc CR3: 0000000037242004 CR4: 0000000000771ef0
[   47.546228] PKRU: 55555554
[   47.546236] Call Trace:
[   47.546244]  <TASK>
[   47.546254]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.546271]  unregister_netdevice_queue+0x9e/0xd0
[   47.546287]  __tun_detach+0x591/0x5b0
[   47.546299]  tun_chr_close+0x3f/0xc0
[   47.546312]  __fput+0xe8/0x2c0
[   47.546324]  task_work_run+0x63/0xa0
[   47.546339]  do_exit+0x2c1/0xba0
[   47.546352]  ? ___sys_recvmsg+0xc6/0x100
[   47.546367]  do_group_exit+0x2d/0xc0
[   47.546377]  get_signal+0x82e/0x900
[   47.546390]  ? sysvec_reschedule_ipi+0x25/0x120
[   47.546405]  arch_do_signal_or_restart+0x77/0x2b0
[   47.546421]  exit_to_user_mode_loop+0x75/0x4a0
[   47.546436]  do_syscall_64+0x439/0xfc0
[   47.546448]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.546463] RIP: 0033:0x4c2d9e
[   47.546475] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.546494] RSP: 002b:00007ffcadb64660 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   47.546520] RAX: 0000000000000050 RBX: 00007ffcadb646f0 RCX: 00000000004c2d9e
[   47.546542] RDX: 0000000000000000 RSI: 00007ffcadb64700 RDI: 0000000000000007
[   47.546562] RBP: 00007ffcadb64670 R08: 0000000000000000 R09: 0000000000000000
[   47.546586] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffcadb646e4
[   47.546608] R13: 00007ffcadb65288 R14: 00007ffcadb64830 R15: 0000000000543540
[   47.546629]  </TASK>
[   47.546636] ---[ end trace 0000000000000000 ]---
[   47.555207] ------------[ cut here ]------------
[   47.555251] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[   47.555290] Modules linked in:
[   47.555311] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.555343] Tainted: [W]=WARN
[   47.555354] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.555376] Workqueue: netns cleanup_net
[   47.555392] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.555408] 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
[   47.555461] RSP: 0018:ff722176c023fc78 EFLAGS: 00010286
[   47.555478] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.555501] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff39bf12834a6b00
[   47.555524] RBP: 0000000000000000 R08: ff39bf1281d95c50 R09: ff39bf128435582c
[   47.555549] R10: ff39bf12819ad118 R11: fefefefefefefeff R12: 0000000000000000
[   47.555572] R13: 0000000000000011 R14: ff39bf12819ad000 R15: ff39bf12834a6b00
[   47.555596] FS:  0000000000000000(0000) GS:ff39bf132de96000(0000) knlGS:0000000000000000
[   47.555623] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.555640] CR2: 00007f76ba439680 CR3: 0000000037242006 CR4: 0000000000771ef0
[   47.555667] PKRU: 55555554
[   47.555675] Call Trace:
[   47.555687]  <TASK>
[   47.555697]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.555716]  default_device_exit_batch+0x318/0x390
[   47.555734]  ops_undo_list+0x10b/0x240
[   47.555747]  cleanup_net+0x1d7/0x2e0
[   47.555760]  process_one_work+0x162/0x360
[   47.555775]  worker_thread+0x16e/0x2d0
[   47.555786]  ? rescuer_thread+0x510/0x510
[   47.555798]  kthread+0xe1/0x120
[   47.555819]  ? kthread_park+0xa0/0xa0
[   47.555831]  ret_from_fork+0x16d/0x250
[   47.555845]  ? kthread_park+0xa0/0xa0
[   47.555856]  ret_from_fork_asm+0x11/0x20
[   47.555872]  </TASK>
[   47.555880] ---[ end trace 0000000000000000 ]---