[    2.395699] ------------[ cut here ]------------
[    2.395798] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/160
[    2.395900] Modules linked in:
[    2.395962] CPU: 2 UID: 0 PID: 160 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.396066] Tainted: [W]=WARN
[    2.396124] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.396206] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.396272] 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
[    2.396420] RSP: 0018:ff6082afc037fcc8 EFLAGS: 00010286
[    2.396486] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.396567] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff32167a03037a00
[    2.396646] RBP: 0000000000000000 R08: ff32167a018c2f50 R09: ff32167a04dd902c
[    2.396724] R10: ff32167a02f3c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.396803] R13: 0000000000000010 R14: ff32167a02f3c000 R15: ff32167a03037a00
[    2.396889] FS:  00007f67c70a1740(0000) GS:ff32167aa9b96000(0000) knlGS:0000000000000000
[    2.396973] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.397045] CR2: 0000562bd377c310 CR3: 0000000004d96002 CR4: 0000000000771ef0
[    2.397129] PKRU: 55555554
[    2.397188] Call Trace:
[    2.397250]  <TASK>
[    2.397304]  rtmsg_ifinfo+0x3c/0xa0
[    2.397365]  register_netdevice+0x889/0x9f0
[    2.397435]  register_netdev+0x1e/0x30
[    2.397494]  loopback_net_init+0x57/0xb0
[    2.397557]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.397627]  ops_init+0x68/0x140
[    2.397689]  setup_net+0x85/0x150
[    2.397749]  copy_net_ns+0xf5/0x200
[    2.397811]  create_new_namespaces+0x117/0x2f0
[    2.397882]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.397950]  ksys_unshare+0x346/0x5e0
[    2.398013]  __x64_sys_unshare+0x12/0x20
[    2.398073]  do_syscall_64+0x104/0xfc0
[    2.398134]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.398210] RIP: 0033:0x7f67c719cbcb
[    2.398270] 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
[    2.398415] RSP: 002b:00007fff82c54b78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.398497] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f67c719cbcb
[    2.398579] RDX: 0000000000000000 RSI: 00007fff82c548e0 RDI: 0000000040000000
[    2.398659] RBP: 00007fff82c54f00 R08: 00007fff82c54ad0 R09: 0000000000000000
[    2.398738] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.398819] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000562bd377fb68
[    2.398904]  </TASK>
[    2.398988] ---[ end trace 0000000000000000 ]---
[    2.402633] ------------[ cut here ]------------
[    2.402714] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.402806] Modules linked in:
[    2.402867] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.402966] Tainted: [W]=WARN
[    2.403024] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.403097] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.403164] 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
[    2.403303] RSP: 0018:ff6082afc037fd68 EFLAGS: 00010286
[    2.403369] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.403453] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff32167a03037a00
[    2.403532] RBP: 0000000000000000 R08: ff32167a0321a810 R09: ff32167a04dde030
[    2.403613] R10: ff32167a04cc0118 R11: fefefefefefefeff R12: 0000000000000000
[    2.403694] R13: 0000000000000010 R14: ff32167a04cc0000 R15: ff32167a03037a00
[    2.403778] FS:  000000002e111400(0000) GS:ff32167aa9b96000(0000) knlGS:0000000000000000
[    2.403862] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.403937] CR2: 00007f426c4fb000 CR3: 0000000003151003 CR4: 0000000000771ef0
[    2.404019] PKRU: 55555554
[    2.404070] Call Trace:
[    2.404122]  <TASK>
[    2.404174]  rtmsg_ifinfo+0x3c/0xa0
[    2.404242]  register_netdevice+0x889/0x9f0
[    2.404303]  __tun_chr_ioctl+0x83c/0x16c0
[    2.404366]  ? do_sys_openat2+0x9a/0xe0
[    2.404432]  __x64_sys_ioctl+0xa1/0xe0
[    2.404494]  do_syscall_64+0x104/0xfc0
[    2.404557]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.404624] RIP: 0033:0x47cc8d
[    2.404684] 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
[    2.404818] RSP: 002b:00007ffd608b91f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.404904] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.404984] RDX: 00007ffd608b9270 RSI: 00000000400454ca RDI: 0000000000000005
[    2.405065] RBP: 00007ffd608b9240 R08: 0000000000000000 R09: 0000000000000000
[    2.405145] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd608b9748
[    2.405234] R13: 00007ffd608b97c8 R14: 0000000000000002 R15: 0000000000543540
[    2.405315]  </TASK>
[    2.405366] ---[ end trace 0000000000000000 ]---
[    2.405459] ------------[ cut here ]------------
[    2.405524] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.405615] Modules linked in:
[    2.405674] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.405769] Tainted: [W]=WARN
[    2.405826] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.405905] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.405972] 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
[    2.406110] RSP: 0018:ff6082afc037fd60 EFLAGS: 00010286
[    2.406184] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.406265] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff32167a03037a00
[    2.406346] RBP: 0000000000000002 R08: ff32167a0321a810 R09: ff32167a04dde030
[    2.406431] R10: ff32167a04cc0118 R11: fefefefefefefeff R12: 0000000000000000
[    2.406511] R13: 0000000000000010 R14: ff32167a04cc0000 R15: ff32167a03037a00
[    2.406595] FS:  000000002e111400(0000) GS:ff32167aa9b96000(0000) knlGS:0000000000000000
[    2.406681] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.406754] CR2: 00007f426c4fb000 CR3: 0000000003151003 CR4: 0000000000771ef0
[    2.406836] PKRU: 55555554
[    2.406889] Call Trace:
[    2.406941]  <TASK>
[    2.406993]  rtnetlink_event+0x6e/0xb0
[    2.407054]  notifier_call_chain+0x6d/0x100
[    2.407116]  netdev_update_features+0x56/0x60
[    2.407192]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.407254]  ? file_init_path+0x62/0x120
[    2.407315]  __x64_sys_ioctl+0xa1/0xe0
[    2.407376]  do_syscall_64+0x104/0xfc0
[    2.407441]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.407507] RIP: 0033:0x47cc8d
[    2.407567] 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
[    2.407701] RSP: 002b:00007ffd608b9230 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.407784] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.407867] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.407948] RBP: 00007ffd608b9280 R08: 0000000000000005 R09: 0000000000001ff0
[    2.408029] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffd608b9748
[    2.408108] R13: 00007ffd608b97c8 R14: 0000000000000002 R15: 0000000000543540
[    2.408195]  </TASK>
[    2.408247] ---[ end trace 0000000000000000 ]---
[    2.408369] ------------[ cut here ]------------
[    2.408439] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.408527] Modules linked in:
[    2.408587] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.408680] Tainted: [W]=WARN
[    2.408738] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.408831] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.408903] 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
[    2.409042] RSP: 0018:ff6082afc037fc10 EFLAGS: 00010286
[    2.409110] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.409198] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff32167a03037a00
[    2.409279] RBP: 0000000000000000 R08: ff32167a0321a810 R09: ff32167a04deb030
[    2.409358] R10: ff32167a04cc0118 R11: fefefefefefefeff R12: 0000000000000000
[    2.409445] R13: 0000000000000010 R14: ff32167a04cc0000 R15: ff32167a03037a00
[    2.409529] FS:  000000002e111400(0000) GS:ff32167aa9b96000(0000) knlGS:0000000000000000
[    2.409612] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.409684] CR2: 00007f426c4fb000 CR3: 0000000003151003 CR4: 0000000000771ef0
[    2.409769] PKRU: 55555554
[    2.409820] Call Trace:
[    2.409872]  <TASK>
[    2.409925]  rtmsg_ifinfo+0x3c/0xa0
[    2.409986]  __dev_notify_flags+0xb1/0xf0
[    2.410047]  netif_change_flags+0x54/0x70
[    2.410108]  dev_change_flags+0x45/0x80
[    2.410168]  devinet_ioctl+0x607/0x7f0
[    2.410238]  inet_ioctl+0x229/0x240
[    2.410298]  ? __rtnl_unlock+0x35/0x60
[    2.410358]  sock_do_ioctl+0x75/0x140
[    2.410425]  __x64_sys_ioctl+0xa1/0xe0
[    2.410486]  do_syscall_64+0x104/0xfc0
[    2.410547]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.410614] RIP: 0033:0x47cc8d
[    2.410674] 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
[    2.410812] RSP: 002b:00007ffd608b9210 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.410897] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.410978] RDX: 00007ffd608b9280 RSI: 0000000000008914 RDI: 0000000000000006
[    2.411061] RBP: 00007ffd608b9260 R08: 0000000000000005 R09: 0000000000001ff0
[    2.411142] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffd608b9748
[    2.411228] R13: 00007ffd608b97c8 R14: 0000000000000002 R15: 0000000000543540
[    2.411308]  </TASK>
[    2.411360] ---[ end trace 0000000000000000 ]---
[   47.378627] ------------[ cut here ]------------
[   47.378732] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[   47.378834] Modules linked in:
[   47.378906] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.379014] Tainted: [W]=WARN
[   47.379110] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.379186] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.379258] 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
[   47.379628] RSP: 0018:ff6082afc037fb58 EFLAGS: 00010286
[   47.379705] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.379791] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff32167a03037e00
[   47.379876] RBP: 0000000000000000 R08: ff32167a0321a810 R09: ff32167a04deb030
[   47.379962] R10: ff32167a04cc0118 R11: fefefefefefefeff R12: 0000000000000000
[   47.380045] R13: 0000000000000010 R14: ff32167a04cc0000 R15: ff32167a03037e00
[   47.380133] FS:  0000000000000000(0000) GS:ff32167aa9b96000(0000) knlGS:0000000000000000
[   47.380219] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.380295] CR2: 00007f426c4fb000 CR3: 0000000028242005 CR4: 0000000000771ef0
[   47.380381] PKRU: 55555554
[   47.380440] Call Trace:
[   47.380494]  <TASK>
[   47.380555]  rtmsg_ifinfo+0x3c/0xa0
[   47.380619]  netif_close_many+0xed/0x190
[   47.380683]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.380752]  ? __queue_work+0x141/0x550
[   47.380816]  unregister_netdevice_queue+0x9e/0xd0
[   47.380887]  __tun_detach+0x591/0x5b0
[   47.380952]  tun_chr_close+0x3f/0xc0
[   47.381014]  __fput+0xe8/0x2c0
[   47.381079]  task_work_run+0x63/0xa0
[   47.381142]  do_exit+0x2c1/0xba0
[   47.381206]  do_group_exit+0x2d/0xc0
[   47.381268]  ? __sys_sendto+0x194/0x220
[   47.381330]  get_signal+0x82e/0x900
[   47.381401]  arch_do_signal_or_restart+0x77/0x2b0
[   47.381473]  exit_to_user_mode_loop+0x75/0x4a0
[   47.381554]  do_syscall_64+0x439/0xfc0
[   47.381996]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.382090] RIP: 0033:0x4c2d9e
[   47.382165] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.382266] RSP: 002b:00007ffd608b8ba0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.382384] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.382506] RDX: 0000000000000014 RSI: 00007ffd608b8c80 RDI: 0000000000000007
[   47.382627] RBP: 00007ffd608b8bb0 R08: 00007ffd608b8c40 R09: 000000000000000c
[   47.382743] R10: 0000000000000000 R11: 0000000000000202 R12: 000000002e11dda0
[   47.382858] R13: 00007ffd608b97c8 R14: 00007ffd608b8d70 R15: 0000000000543540
[   47.382976]  </TASK>
[   47.383038] ---[ end trace 0000000000000000 ]---
[   47.383225] ------------[ cut here ]------------
[   47.383271] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: packetdrill/160
[   47.383329] Modules linked in:
[   47.383355] CPU: 1 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.383423] Tainted: [W]=WARN
[   47.383443] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.383481] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.383510] 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
[   47.383622] RSP: 0018:ff6082afc037fbc8 EFLAGS: 00010286
[   47.383656] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.383701] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff32167a0306be00
[   47.383743] RBP: 0000000000000000 R08: ff32167a0321a810 R09: ff32167a04de0830
[   47.383786] R10: ff32167a04cc0118 R11: fefefefefefefeff R12: 0000000000000000
[   47.383831] R13: 0000000000000011 R14: ff32167a04cc0000 R15: ff32167a0306be00
[   47.383878] FS:  0000000000000000(0000) GS:ff32167aa9b16000(0000) knlGS:0000000000000000
[   47.383926] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.383963] CR2: 00007f6d616af680 CR3: 00000000033b6005 CR4: 0000000000771ef0
[   47.384005] PKRU: 55555554
[   47.384020] Call Trace:
[   47.384035]  <TASK>
[   47.384049]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.384083]  unregister_netdevice_queue+0x9e/0xd0
[   47.384114]  __tun_detach+0x591/0x5b0
[   47.384139]  tun_chr_close+0x3f/0xc0
[   47.384165]  __fput+0xe8/0x2c0
[   47.384187]  task_work_run+0x63/0xa0
[   47.384211]  do_exit+0x2c1/0xba0
[   47.384239]  do_group_exit+0x2d/0xc0
[   47.384264]  ? __sys_sendto+0x194/0x220
[   47.384285]  get_signal+0x82e/0x900
[   47.384309]  arch_do_signal_or_restart+0x77/0x2b0
[   47.384341]  exit_to_user_mode_loop+0x75/0x4a0
[   47.384371]  do_syscall_64+0x439/0xfc0
[   47.384398]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.384431] RIP: 0033:0x4c2d9e
[   47.384452] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.384489] RSP: 002b:00007ffd608b8ba0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.384531] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.384580] RDX: 0000000000000014 RSI: 00007ffd608b8c80 RDI: 0000000000000007
[   47.384624] RBP: 00007ffd608b8bb0 R08: 00007ffd608b8c40 R09: 000000000000000c
[   47.384669] R10: 0000000000000000 R11: 0000000000000202 R12: 000000002e11dda0
[   47.384713] R13: 00007ffd608b97c8 R14: 00007ffd608b8d70 R15: 0000000000543540
[   47.384758]  </TASK>
[   47.384773] ---[ end trace 0000000000000000 ]---
[   47.393490] ------------[ cut here ]------------
[   47.393532] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:0/12
[   47.393607] Modules linked in:
[   47.393634] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.393701] Tainted: [W]=WARN
[   47.393728] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.393770] Workqueue: netns cleanup_net
[   47.393797] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.393833] 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
[   47.393938] RSP: 0018:ff6082afc0067c78 EFLAGS: 00010286
[   47.393970] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.394016] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff32167a03037f00
[   47.394065] RBP: 0000000000000000 R08: ff32167a018c2f50 R09: ff32167a019c382c
[   47.394110] R10: ff32167a02f3c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.394155] R13: 0000000000000011 R14: ff32167a02f3c000 R15: ff32167a03037f00
[   47.394203] FS:  0000000000000000(0000) GS:ff32167aa9a96000(0000) knlGS:0000000000000000
[   47.394251] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.394286] CR2: 000055d7cacf92b8 CR3: 0000000003323006 CR4: 0000000000771ef0
[   47.394329] PKRU: 55555554
[   47.394344] Call Trace:
[   47.394359]  <TASK>
[   47.394376]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.394413]  default_device_exit_batch+0x318/0x390
[   47.394439]  ops_undo_list+0x10b/0x240
[   47.394462]  cleanup_net+0x1d7/0x2e0
[   47.394486]  process_one_work+0x162/0x360
[   47.394511]  worker_thread+0x16e/0x2d0
[   47.394533]  ? rescuer_thread+0x510/0x510
[   47.394563]  kthread+0xe1/0x120
[   47.394588]  ? kthread_park+0xa0/0xa0
[   47.394612]  ret_from_fork+0x16d/0x250
[   47.394635]  ? kthread_park+0xa0/0xa0
[   47.394656]  ret_from_fork_asm+0x11/0x20
[   47.394680]  </TASK>
[   47.394696] ---[ end trace 0000000000000000 ]---