[    2.497743] ------------[ cut here ]------------
[    2.497797] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/159
[    2.498407] Modules linked in:
[    2.498475] CPU: 3 UID: 0 PID: 159 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.498620] Tainted: [W]=WARN
[    2.498654] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.498677] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.498698] 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
[    2.498752] RSP: 0018:ff5a835cc03f7cc8 EFLAGS: 00010286
[    2.498777] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.498802] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26112e82f45100
[    2.498830] RBP: 0000000000000000 R08: ff26112e836417d0 R09: ff26112e8351a02c
[    2.498855] R10: ff26112e82fb5118 R11: fefefefefefefeff R12: 0000000000000000
[    2.498880] R13: 0000000000000010 R14: ff26112e82fb5000 R15: ff26112e82f45100
[    2.498914] FS:  00007fe922817740(0000) GS:ff26112f30216000(0000) knlGS:0000000000000000
[    2.498945] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.498965] CR2: 000055e7b2e7f310 CR3: 0000000003730005 CR4: 0000000000771ef0
[    2.498991] PKRU: 55555554
[    2.499000] Call Trace:
[    2.499009]  <TASK>
[    2.499019]  rtmsg_ifinfo+0x3c/0xa0
[    2.499032]  register_netdevice+0x889/0x9f0
[    2.499051]  register_netdev+0x1e/0x30
[    2.499064]  loopback_net_init+0x57/0xb0
[    2.499081]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.499098]  ops_init+0x68/0x140
[    2.499115]  setup_net+0x85/0x150
[    2.499129]  copy_net_ns+0xf5/0x200
[    2.499143]  create_new_namespaces+0x117/0x2f0
[    2.499163]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.499180]  ksys_unshare+0x346/0x5e0
[    2.499199]  __x64_sys_unshare+0x12/0x20
[    2.499213]  do_syscall_64+0x104/0xfc0
[    2.499228]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.499246] RIP: 0033:0x7fe922912bcb
[    2.499260] 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
[    2.499320] RSP: 002b:00007ffcb674ece8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.499351] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe922912bcb
[    2.499376] RDX: 0000000000000000 RSI: 00007ffcb674ea50 RDI: 0000000040000000
[    2.499399] RBP: 00007ffcb674f070 R08: 00007ffcb674ec40 R09: 0000000000000000
[    2.499423] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.499447] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055e7b2e82b68
[    2.499471]  </TASK>
[    2.499479] ---[ end trace 0000000000000000 ]---
[    2.503125] ------------[ cut here ]------------
[    2.503161] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.503219] Modules linked in:
[    2.503242] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.503300] Tainted: [W]=WARN
[    2.503323] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.503364] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.503396] 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
[    2.503503] RSP: 0018:ff5a835cc03f7d68 EFLAGS: 00010286
[    2.503535] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.503582] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26112e82f45100
[    2.503626] RBP: 0000000000000000 R08: ff26112e8358b750 R09: ff26112e8351f030
[    2.503671] R10: ff26112e84708118 R11: fefefefefefefeff R12: 0000000000000000
[    2.503715] R13: 0000000000000010 R14: ff26112e84708000 R15: ff26112e82f45100
[    2.503758] FS:  0000000013fd5400(0000) GS:ff26112f30216000(0000) knlGS:0000000000000000
[    2.503795] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.503834] CR2: 00007f76a5c02000 CR3: 00000000047b9006 CR4: 0000000000771ef0
[    2.503880] PKRU: 55555554
[    2.503900] Call Trace:
[    2.503917]  <TASK>
[    2.503933]  rtmsg_ifinfo+0x3c/0xa0
[    2.503956]  register_netdevice+0x889/0x9f0
[    2.503979]  __tun_chr_ioctl+0x83c/0x16c0
[    2.504000]  ? do_sys_openat2+0x9a/0xe0
[    2.504025]  __x64_sys_ioctl+0xa1/0xe0
[    2.504047]  do_syscall_64+0x104/0xfc0
[    2.504072]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.504104] RIP: 0033:0x47cc8d
[    2.504123] 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
[    2.504216] RSP: 002b:00007fff66ad4770 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.504262] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.504304] RDX: 00007fff66ad47f0 RSI: 00000000400454ca RDI: 0000000000000005
[    2.504350] RBP: 00007fff66ad47c0 R08: 0000000000000000 R09: 0000000000000000
[    2.504396] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff66ad4cc8
[    2.504439] R13: 00007fff66ad4d48 R14: 0000000000000002 R15: 0000000000543540
[    2.504481]  </TASK>
[    2.504500] ---[ end trace 0000000000000000 ]---
[    2.504545] ------------[ cut here ]------------
[    2.504575] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.504626] Modules linked in:
[    2.504647] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.504710] Tainted: [W]=WARN
[    2.504731] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.504767] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.504797] 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
[    2.504898] RSP: 0018:ff5a835cc03f7d60 EFLAGS: 00010286
[    2.504927] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.504969] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26112e82f45100
[    2.505012] RBP: 0000000000000002 R08: ff26112e8358b750 R09: ff26112e8351f030
[    2.505053] R10: ff26112e84708118 R11: fefefefefefefeff R12: 0000000000000000
[    2.505094] R13: 0000000000000010 R14: ff26112e84708000 R15: ff26112e82f45100
[    2.505140] FS:  0000000013fd5400(0000) GS:ff26112f30216000(0000) knlGS:0000000000000000
[    2.505186] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.505218] CR2: 00007f76a5c02000 CR3: 00000000047b9006 CR4: 0000000000771ef0
[    2.505264] PKRU: 55555554
[    2.505278] Call Trace:
[    2.505291]  <TASK>
[    2.505306]  rtnetlink_event+0x6e/0xb0
[    2.505329]  notifier_call_chain+0x6d/0x100
[    2.505357]  netdev_update_features+0x56/0x60
[    2.505388]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.505408]  ? file_init_path+0x62/0x120
[    2.505433]  __x64_sys_ioctl+0xa1/0xe0
[    2.505455]  do_syscall_64+0x104/0xfc0
[    2.505475]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.505507] RIP: 0033:0x47cc8d
[    2.505529] 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
[    2.505619] RSP: 002b:00007fff66ad47b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.505661] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.505702] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.505745] RBP: 00007fff66ad4800 R08: 0000000000000005 R09: 0000000000000010
[    2.505787] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff66ad4cc8
[    2.505834] R13: 00007fff66ad4d48 R14: 0000000000000002 R15: 0000000000543540
[    2.505878]  </TASK>
[    2.505892] ---[ end trace 0000000000000000 ]---
[    2.505937] ------------[ cut here ]------------
[    2.505964] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.506016] Modules linked in:
[    2.506036] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.506091] Tainted: [W]=WARN
[    2.506114] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.506149] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.506182] 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
[    2.506277] RSP: 0018:ff5a835cc03f7c10 EFLAGS: 00010286
[    2.506303] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.506339] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26112e82f45100
[    2.506386] RBP: 0000000000000000 R08: ff26112e8358b750 R09: ff26112e8351c030
[    2.506431] R10: ff26112e84708118 R11: fefefefefefefeff R12: 0000000000000000
[    2.506473] R13: 0000000000000010 R14: ff26112e84708000 R15: ff26112e82f45100
[    2.506518] FS:  0000000013fd5400(0000) GS:ff26112f30216000(0000) knlGS:0000000000000000
[    2.506560] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.506594] CR2: 00007f76a5c02000 CR3: 00000000047b9006 CR4: 0000000000771ef0
[    2.506635] PKRU: 55555554
[    2.506650] Call Trace:
[    2.506666]  <TASK>
[    2.506683]  rtmsg_ifinfo+0x3c/0xa0
[    2.506704]  __dev_notify_flags+0xb1/0xf0
[    2.506728]  netif_change_flags+0x54/0x70
[    2.506750]  dev_change_flags+0x45/0x80
[    2.506772]  devinet_ioctl+0x607/0x7f0
[    2.506794]  inet_ioctl+0x229/0x240
[    2.506818]  ? __rtnl_unlock+0x35/0x60
[    2.506841]  sock_do_ioctl+0x75/0x140
[    2.506866]  __x64_sys_ioctl+0xa1/0xe0
[    2.506889]  do_syscall_64+0x104/0xfc0
[    2.506910]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.506937] RIP: 0033:0x47cc8d
[    2.506958] 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
[    2.507058] RSP: 002b:00007fff66ad4790 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.507104] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.507142] RDX: 00007fff66ad4800 RSI: 0000000000008914 RDI: 0000000000000006
[    2.507185] RBP: 00007fff66ad47e0 R08: 0000000000000005 R09: 0000000000000010
[    2.507229] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff66ad4cc8
[    2.507269] R13: 00007fff66ad4d48 R14: 0000000000000002 R15: 0000000000543540
[    2.507313]  </TASK>
[    2.507329] ---[ end trace 0000000000000000 ]---
[   47.473989] ------------[ cut here ]------------
[   47.474064] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.474130] Modules linked in:
[   47.474158] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.474246] Tainted: [W]=WARN
[   47.474267] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.474308] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.474337] 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
[   47.474444] RSP: 0018:ff5a835cc03f7b58 EFLAGS: 00010286
[   47.474477] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.474522] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26112e82f45600
[   47.474569] RBP: 0000000000000000 R08: ff26112e8358b750 R09: ff26112e8351c030
[   47.474609] R10: ff26112e84708118 R11: fefefefefefefeff R12: 0000000000000000
[   47.474654] R13: 0000000000000010 R14: ff26112e84708000 R15: ff26112e82f45600
[   47.474701] FS:  0000000000000000(0000) GS:ff26112f30216000(0000) knlGS:0000000000000000
[   47.474748] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.474777] CR2: 00007f76a5c02000 CR3: 000000002f042003 CR4: 0000000000771ef0
[   47.474826] PKRU: 55555554
[   47.474840] Call Trace:
[   47.474856]  <TASK>
[   47.474873]  rtmsg_ifinfo+0x3c/0xa0
[   47.474900]  netif_close_many+0xed/0x190
[   47.474929]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.474960]  ? __queue_work+0x141/0x550
[   47.474988]  unregister_netdevice_queue+0x9e/0xd0
[   47.475017]  __tun_detach+0x591/0x5b0
[   47.475046]  tun_chr_close+0x3f/0xc0
[   47.475068]  __fput+0xe8/0x2c0
[   47.475094]  task_work_run+0x63/0xa0
[   47.475117]  do_exit+0x2c1/0xba0
[   47.475140]  do_group_exit+0x2d/0xc0
[   47.475169]  ? __sys_sendto+0x194/0x220
[   47.475191]  get_signal+0x82e/0x900
[   47.475217]  ? irqentry_exit+0x10a/0x540
[   47.475242]  ? sysvec_reschedule_ipi+0x25/0x120
[   47.475272]  arch_do_signal_or_restart+0x77/0x2b0
[   47.475306]  exit_to_user_mode_loop+0x75/0x4a0
[   47.475334]  do_syscall_64+0x439/0xfc0
[   47.475360]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.475392] RIP: 0033:0x4c2d9e
[   47.475415] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.475451] RSP: 002b:00007fff66ad4120 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.475785] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.475830] RDX: 0000000000000014 RSI: 00007fff66ad4200 RDI: 0000000000000007
[   47.475878] RBP: 00007fff66ad4130 R08: 00007fff66ad41c0 R09: 000000000000000c
[   47.475915] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000013fe0570
[   47.475958] R13: 00007fff66ad4d48 R14: 00007fff66ad42f0 R15: 0000000000543540
[   47.476001]  </TASK>
[   47.476016] ---[ end trace 0000000000000000 ]---
[   47.476125] ------------[ cut here ]------------
[   47.476151] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.476208] Modules linked in:
[   47.476230] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.476288] Tainted: [W]=WARN
[   47.476309] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.476345] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.476377] 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
[   47.476476] RSP: 0018:ff5a835cc03f7bc8 EFLAGS: 00010286
[   47.476506] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.476548] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26112e82f45600
[   47.476593] RBP: 0000000000000000 R08: ff26112e8358b750 R09: ff26112e8352b030
[   47.476641] R10: ff26112e84708118 R11: fefefefefefefeff R12: 0000000000000000
[   47.476681] R13: 0000000000000011 R14: ff26112e84708000 R15: ff26112e82f45600
[   47.476728] FS:  0000000000000000(0000) GS:ff26112f30216000(0000) knlGS:0000000000000000
[   47.476764] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.476802] CR2: 00007f76a5c02000 CR3: 0000000004677001 CR4: 0000000000771ef0
[   47.476846] PKRU: 55555554
[   47.476862] Call Trace:
[   47.476876]  <TASK>
[   47.476892]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.476924]  unregister_netdevice_queue+0x9e/0xd0
[   47.476952]  __tun_detach+0x591/0x5b0
[   47.476977]  tun_chr_close+0x3f/0xc0
[   47.477003]  __fput+0xe8/0x2c0
[   47.477028]  task_work_run+0x63/0xa0
[   47.477055]  do_exit+0x2c1/0xba0
[   47.477075]  do_group_exit+0x2d/0xc0
[   47.477101]  ? __sys_sendto+0x194/0x220
[   47.477124]  get_signal+0x82e/0x900
[   47.477149]  ? irqentry_exit+0x10a/0x540
[   47.477174]  ? sysvec_reschedule_ipi+0x25/0x120
[   47.477207]  arch_do_signal_or_restart+0x77/0x2b0
[   47.477238]  exit_to_user_mode_loop+0x75/0x4a0
[   47.477274]  do_syscall_64+0x439/0xfc0
[   47.477298]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.477326] RIP: 0033:0x4c2d9e
[   47.477346] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.477386] RSP: 002b:00007fff66ad4120 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.477428] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.477472] RDX: 0000000000000014 RSI: 00007fff66ad4200 RDI: 0000000000000007
[   47.477518] RBP: 00007fff66ad4130 R08: 00007fff66ad41c0 R09: 000000000000000c
[   47.477561] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000013fe0570
[   47.477605] R13: 00007fff66ad4d48 R14: 00007fff66ad42f0 R15: 0000000000543540
[   47.477648]  </TASK>
[   47.477664] ---[ end trace 0000000000000000 ]---
[   47.487590] ------------[ cut here ]------------
[   47.487672] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: kworker/u16:1/63
[   47.487771] Modules linked in:
[   47.487830] CPU: 2 UID: 0 PID: 63 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.487922] Tainted: [W]=WARN
[   47.487977] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.488047] Workqueue: netns cleanup_net
[   47.488139] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.488215] 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
[   47.488355] RSP: 0018:ff5a835cc022fc78 EFLAGS: 00010286
[   47.488422] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.488513] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff26112e8341fb00
[   47.488598] RBP: 0000000000000000 R08: ff26112e836417d0 R09: ff26112e846ca02c
[   47.488680] R10: ff26112e82fb5118 R11: fefefefefefefeff R12: 0000000000000000
[   47.488762] R13: 0000000000000011 R14: ff26112e82fb5000 R15: ff26112e8341fb00
[   47.488845] FS:  0000000000000000(0000) GS:ff26112f30196000(0000) knlGS:0000000000000000
[   47.488928] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.488999] CR2: 000055d0553e72b8 CR3: 000000000452a006 CR4: 0000000000771ef0
[   47.489080] PKRU: 55555554
[   47.489129] Call Trace:
[   47.489187]  <TASK>
[   47.489237]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.489303]  default_device_exit_batch+0x318/0x390
[   47.489369]  ops_undo_list+0x10b/0x240
[   47.489429]  cleanup_net+0x1d7/0x2e0
[   47.489496]  process_one_work+0x162/0x360
[   47.489556]  worker_thread+0x16e/0x2d0
[   47.489618]  ? rescuer_thread+0x510/0x510
[   47.489677]  kthread+0xe1/0x120
[   47.489737]  ? kthread_park+0xa0/0xa0
[   47.489796]  ret_from_fork+0x16d/0x250
[   47.489855]  ? kthread_park+0xa0/0xa0
[   47.489914]  ret_from_fork_asm+0x11/0x20
[   47.489974]  </TASK>
[   47.490022] ---[ end trace 0000000000000000 ]---