[  183.972461] ------------[ cut here ]------------
[  183.972508] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/336
[  183.972563] Modules linked in:
[  183.972586] CPU: 3 UID: 0 PID: 336 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.972640] Tainted: [W]=WARN
[  183.972663] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.972694] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.972720] 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
[  183.972811] RSP: 0018:ff5c9d164050fcc8 EFLAGS: 00010286
[  183.972841] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.972880] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff135f8982eff000
[  183.972923] RBP: 0000000000000000 R08: ff135f898313bf10 R09: ff135f898499802c
[  183.972965] R10: ff135f8982028118 R11: fefefefefefefeff R12: 0000000000000000
[  183.973014] R13: 0000000000000010 R14: ff135f8982028000 R15: ff135f8982eff000
[  183.973059] FS:  00007fba00665740(0000) GS:ff135f8a2ce16000(0000) knlGS:0000000000000000
[  183.973102] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.973134] CR2: 00007fba00730820 CR3: 0000000006dc9006 CR4: 0000000000771ef0
[  183.973173] PKRU: 55555554
[  183.973196] Call Trace:
[  183.973210]  <TASK>
[  183.973224]  rtmsg_ifinfo+0x3c/0xa0
[  183.973247]  register_netdevice+0x889/0x9f0
[  183.973270]  register_netdev+0x1e/0x30
[  183.973287]  loopback_net_init+0x57/0xb0
[  183.973312]  ? vsock_sysctl_init_net+0xb6/0x140
[  183.973339]  ops_init+0x68/0x140
[  183.973360]  setup_net+0x85/0x150
[  183.973380]  copy_net_ns+0xf5/0x200
[  183.973400]  create_new_namespaces+0x117/0x2f0
[  183.973424]  unshare_nsproxy_namespaces+0x85/0xb0
[  183.973451]  ksys_unshare+0x346/0x5e0
[  183.973476]  __x64_sys_unshare+0x12/0x20
[  183.973497]  do_syscall_64+0x104/0xfc0
[  183.973520]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.973548] RIP: 0033:0x7fba00760bcb
[  183.973574] 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
[  183.973669] RSP: 002b:00007ffe67bc1fc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  183.973709] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fba00760bcb
[  183.973749] RDX: 0000000000000000 RSI: 00007ffe67bc1d30 RDI: 0000000040000000
[  183.973795] RBP: 00007ffe67bc2350 R08: 00007ffe67bc1f20 R09: 0000000000000000
[  183.973840] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  183.973885] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000562ba590cb68
[  183.973925]  </TASK>
[  183.973938] ---[ end trace 0000000000000000 ]---
[  183.974518] ------------[ cut here ]------------
[  183.974547] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/336
[  183.974598] Modules linked in:
[  183.974616] CPU: 3 UID: 0 PID: 336 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.974670] Tainted: [W]=WARN
[  183.974690] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.974724] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.974749] 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
[  183.974844] RSP: 0018:ff5c9d164050fd68 EFLAGS: 00010286
[  183.974870] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.974909] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff135f8982eff000
[  183.974949] RBP: 0000000000000000 R08: ff135f898325a6d0 R09: ff135f8982995030
[  183.974994] R10: ff135f8984954118 R11: fefefefefefefeff R12: 0000000000000000
[  183.975034] R13: 0000000000000010 R14: ff135f8984954000 R15: ff135f8982eff000
[  183.975083] FS:  00000000291d7400(0000) GS:ff135f8a2ce16000(0000) knlGS:0000000000000000
[  183.975123] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.975157] CR2: 00007f8cb2443000 CR3: 00000000033b4001 CR4: 0000000000771ef0
[  183.975198] PKRU: 55555554
[  183.975209] Call Trace:
[  183.975224]  <TASK>
[  183.975238]  rtmsg_ifinfo+0x3c/0xa0
[  183.975260]  register_netdevice+0x889/0x9f0
[  183.975286]  __tun_chr_ioctl+0x83c/0x16c0
[  183.975306]  ? do_sys_openat2+0x9a/0xe0
[  183.975328]  __x64_sys_ioctl+0xa1/0xe0
[  183.975351]  do_syscall_64+0x104/0xfc0
[  183.975374]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.975406] RIP: 0033:0x47cc8d
[  183.975425] 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
[  183.975516] RSP: 002b:00007ffc53517d30 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  183.975559] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  183.975599] RDX: 00007ffc53517db0 RSI: 00000000400454ca RDI: 0000000000000005
[  183.975637] RBP: 00007ffc53517d80 R08: 0000000000000000 R09: 0000000000000000
[  183.975676] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc53518288
[  183.975716] R13: 00007ffc53518308 R14: 0000000000000002 R15: 0000000000543540
[  183.975762]  </TASK>
[  183.975774] ---[ end trace 0000000000000000 ]---
[  183.975807] ------------[ cut here ]------------
[  183.975832] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/336
[  183.975874] Modules linked in:
[  183.975896] CPU: 3 UID: 0 PID: 336 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.975951] Tainted: [W]=WARN
[  183.975973] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.976013] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.976039] 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
[  183.976133] RSP: 0018:ff5c9d164050fd60 EFLAGS: 00010286
[  183.976157] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  183.976197] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff135f8982eff000
[  183.976236] RBP: 0000000000000002 R08: ff135f898325a6d0 R09: ff135f8982995030
[  183.976279] R10: ff135f8984954118 R11: fefefefefefefeff R12: 0000000000000000
[  183.976322] R13: 0000000000000010 R14: ff135f8984954000 R15: ff135f8982eff000
[  183.976362] FS:  00000000291d7400(0000) GS:ff135f8a2ce16000(0000) knlGS:0000000000000000
[  183.976402] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.976434] CR2: 00007f8cb2443000 CR3: 00000000033b4001 CR4: 0000000000771ef0
[  183.976472] PKRU: 55555554
[  183.976488] Call Trace:
[  183.976503]  <TASK>
[  183.976516]  rtnetlink_event+0x6e/0xb0
[  183.976542]  notifier_call_chain+0x6d/0x100
[  183.976568]  netdev_update_features+0x56/0x60
[  183.976597]  __tun_chr_ioctl+0xbf1/0x16c0
[  183.976618]  ? file_init_path+0x62/0x120
[  183.976640]  __x64_sys_ioctl+0xa1/0xe0
[  183.976660]  do_syscall_64+0x104/0xfc0
[  183.976680]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.976704] RIP: 0033:0x47cc8d
[  183.976725] 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
[  183.976816] RSP: 002b:00007ffc53517d70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  183.976858] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  183.976899] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  183.976940] RBP: 00007ffc53517dc0 R08: 0000000000000000 R09: 0000000000000000
[  183.976976] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc53518288
[  183.977015] R13: 00007ffc53518308 R14: 0000000000000002 R15: 0000000000543540
[  183.977056]  </TASK>
[  183.977070] ---[ end trace 0000000000000000 ]---
[  183.977108] ------------[ cut here ]------------
[  183.977134] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/336
[  183.977179] Modules linked in:
[  183.977202] CPU: 3 UID: 0 PID: 336 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.977259] Tainted: [W]=WARN
[  183.977281] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.977316] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.977343] 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
[  183.977431] RSP: 0018:ff5c9d164050fc10 EFLAGS: 00010286
[  183.977459] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  183.977499] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff135f8982eff000
[  183.977540] RBP: 0000000000000000 R08: ff135f898325a6d0 R09: ff135f898499a030
[  183.977579] R10: ff135f8984954118 R11: fefefefefefefeff R12: 0000000000000000
[  183.977615] R13: 0000000000000010 R14: ff135f8984954000 R15: ff135f8982eff000
[  183.977653] FS:  00000000291d7400(0000) GS:ff135f8a2ce16000(0000) knlGS:0000000000000000
[  183.977694] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.977728] CR2: 00007f8cb2443000 CR3: 00000000033b4001 CR4: 0000000000771ef0
[  183.977766] PKRU: 55555554
[  183.977779] Call Trace:
[  183.977793]  <TASK>
[  183.977808]  rtmsg_ifinfo+0x3c/0xa0
[  183.977828]  __dev_notify_flags+0xb1/0xf0
[  183.977851]  netif_change_flags+0x54/0x70
[  183.977872]  dev_change_flags+0x45/0x80
[  183.977895]  devinet_ioctl+0x607/0x7f0
[  183.977918]  inet_ioctl+0x229/0x240
[  183.977942]  ? __rtnl_unlock+0x35/0x60
[  183.977964]  sock_do_ioctl+0x75/0x140
[  183.977986]  __x64_sys_ioctl+0xa1/0xe0
[  183.978008]  do_syscall_64+0x104/0xfc0
[  183.978029]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.978059] RIP: 0033:0x47cc8d
[  183.978081] 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
[  183.978172] RSP: 002b:00007ffc53517d50 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  183.978210] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  183.978250] RDX: 00007ffc53517dc0 RSI: 0000000000008914 RDI: 0000000000000006
[  183.978288] RBP: 00007ffc53517da0 R08: 0000000000000000 R09: 0000000000000000
[  183.978326] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc53518288
[  183.978362] R13: 00007ffc53518308 R14: 0000000000000002 R15: 0000000000543540
[  183.978403]  </TASK>
[  183.978417] ---[ end trace 0000000000000000 ]---
[  228.958805] ------------[ cut here ]------------
[  228.958917] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/336
[  228.958998] Modules linked in:
[  228.959026] CPU: 3 UID: 0 PID: 336 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  228.959087] Tainted: [W]=WARN
[  228.959110] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  228.959147] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  228.959197] 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
[  228.959306] RSP: 0018:ff5c9d164050fb58 EFLAGS: 00010286
[  228.959341] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  228.959389] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff135f8981dea200
[  228.959431] RBP: 0000000000000000 R08: ff135f898325a6d0 R09: ff135f898499a030
[  228.959472] R10: ff135f8984954118 R11: fefefefefefefeff R12: 0000000000000000
[  228.959513] R13: 0000000000000010 R14: ff135f8984954000 R15: ff135f8981dea200
[  228.959559] FS:  0000000000000000(0000) GS:ff135f8a2ce16000(0000) knlGS:0000000000000000
[  228.959609] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  228.959643] CR2: 00007f8cb2443000 CR3: 000000001d842004 CR4: 0000000000771ef0
[  228.959689] PKRU: 55555554
[  228.959706] Call Trace:
[  228.959721]  <TASK>
[  228.959744]  rtmsg_ifinfo+0x3c/0xa0
[  228.959768]  netif_close_many+0xed/0x190
[  228.959805]  unregister_netdevice_many_notify+0x267/0x9d0
[  228.959832]  ? __queue_work+0x141/0x550
[  228.959857]  unregister_netdevice_queue+0x9e/0xd0
[  228.959882]  __tun_detach+0x591/0x5b0
[  228.959912]  tun_chr_close+0x3f/0xc0
[  228.959933]  __fput+0xe8/0x2c0
[  228.959959]  task_work_run+0x63/0xa0
[  228.959981]  do_exit+0x2c1/0xba0
[  228.960009]  do_group_exit+0x2d/0xc0
[  228.960032]  get_signal+0x82e/0x900
[  228.960057]  ? __d_alloc+0x40/0x200
[  228.960083]  ? alloc_empty_file+0x3f/0xd0
[  228.960107]  arch_do_signal_or_restart+0x77/0x2b0
[  228.960139]  ? alloc_file_pseudo+0xc1/0x110
[  228.960160]  ? __sys_socket+0xda/0x130
[  228.960179]  exit_to_user_mode_loop+0x75/0x4a0
[  228.960221]  do_syscall_64+0x439/0xfc0
[  228.960243]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  228.960267] RIP: 0033:0x47ea2b
[  228.960294] Code: Unable to access opcode bytes at 0x47ea01.
[  228.960324] RSP: 002b:00007ffc535177d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  228.960367] RAX: 0000000000000007 RBX: 00007ffc535178b0 RCX: 000000000047ea2b
[  228.960408] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  228.960449] RBP: 00007ffc53517810 R08: 0000000000000041 R09: 00000000291d83e0
[  228.960486] R10: 0000000000000040 R11: 0000000000000202 R12: 00007ffc53518288
[  228.960528] R13: 00007ffc53518308 R14: 00007ffc53517d88 R15: 0000000000543540
[  228.960569]  </TASK>
[  228.960585] ---[ end trace 0000000000000000 ]---
[  228.960695] ------------[ cut here ]------------
[  228.960723] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/336
[  228.960779] Modules linked in:
[  228.960797] CPU: 3 UID: 0 PID: 336 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  228.960853] Tainted: [W]=WARN
[  228.960881] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  228.960915] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  228.960940] 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
[  228.961036] RSP: 0018:ff5c9d164050fbc8 EFLAGS: 00010286
[  228.961064] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  228.961103] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff135f8981dea200
[  228.961141] RBP: 0000000000000000 R08: ff135f898325a6d0 R09: ff135f8984b1e830
[  228.961183] R10: ff135f8984954118 R11: fefefefefefefeff R12: 0000000000000000
[  228.961320] R13: 0000000000000011 R14: ff135f8984954000 R15: ff135f8981dea200
[  228.961365] FS:  0000000000000000(0000) GS:ff135f8a2ce16000(0000) knlGS:0000000000000000
[  228.961409] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  228.961447] CR2: 00007f8cb2443000 CR3: 000000001d842004 CR4: 0000000000771ef0
[  228.961497] PKRU: 55555554
[  228.961511] Call Trace:
[  228.961524]  <TASK>
[  228.961547]  unregister_netdevice_many_notify+0x877/0x9d0
[  228.961592]  unregister_netdevice_queue+0x9e/0xd0
[  228.961650]  __tun_detach+0x591/0x5b0
[  228.961669]  tun_chr_close+0x3f/0xc0
[  228.961740]  __fput+0xe8/0x2c0
[  228.961795]  task_work_run+0x63/0xa0
[  228.961829]  do_exit+0x2c1/0xba0
[  228.961853]  do_group_exit+0x2d/0xc0
[  228.961903]  get_signal+0x82e/0x900
[  228.961940]  ? __d_alloc+0x40/0x200
[  228.961977]  ? alloc_empty_file+0x3f/0xd0
[  228.962028]  arch_do_signal_or_restart+0x77/0x2b0
[  228.962093]  ? alloc_file_pseudo+0xc1/0x110
[  228.962128]  ? __sys_socket+0xda/0x130
[  228.962149]  exit_to_user_mode_loop+0x75/0x4a0
[  228.962197]  do_syscall_64+0x439/0xfc0
[  228.962238]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  228.962293] RIP: 0033:0x47ea2b
[  228.962330] Code: Unable to access opcode bytes at 0x47ea01.
[  228.962403] RSP: 002b:00007ffc535177d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  228.962483] RAX: 0000000000000007 RBX: 00007ffc535178b0 RCX: 000000000047ea2b
[  228.962561] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  228.962644] RBP: 00007ffc53517810 R08: 0000000000000041 R09: 00000000291d83e0
[  228.962706] R10: 0000000000000040 R11: 0000000000000202 R12: 00007ffc53518288
[  228.962782] R13: 00007ffc53518308 R14: 00007ffc53517d88 R15: 0000000000543540
[  228.962862]  </TASK>
[  228.962884] ---[ end trace 0000000000000000 ]---
[  228.973304] ------------[ cut here ]------------
[  228.973342] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:1/65
[  228.973401] Modules linked in:
[  228.973425] CPU: 1 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  228.973483] Tainted: [W]=WARN
[  228.973506] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  228.973541] Workqueue: netns cleanup_net
[  228.973565] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  228.973594] 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
[  228.973685] RSP: 0018:ff5c9d164023fc78 EFLAGS: 00010286
[  228.973711] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  228.973754] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff135f8981dea300
[  228.973786] RBP: 0000000000000000 R08: ff135f898313bf10 R09: ff135f8984b1b02c
[  228.973825] R10: ff135f8982028118 R11: fefefefefefefeff R12: 0000000000000000
[  228.973866] R13: 0000000000000011 R14: ff135f8982028000 R15: ff135f8981dea300
[  228.973909] FS:  0000000000000000(0000) GS:ff135f8a2cd16000(0000) knlGS:0000000000000000
[  228.973956] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  228.973991] CR2: 00007f6eb934e0a0 CR3: 000000001d842006 CR4: 0000000000771ef0
[  228.974032] PKRU: 55555554
[  228.974046] Call Trace:
[  228.974062]  <TASK>
[  228.974076]  unregister_netdevice_many_notify+0x877/0x9d0
[  228.974105]  default_device_exit_batch+0x318/0x390
[  228.974133]  ops_undo_list+0x10b/0x240
[  228.974157]  cleanup_net+0x1d7/0x2e0
[  228.974177]  process_one_work+0x162/0x360
[  228.974215]  worker_thread+0x16e/0x2d0
[  228.974241]  ? rescuer_thread+0x510/0x510
[  228.974262]  kthread+0xe1/0x120
[  228.974286]  ? kthread_park+0xa0/0xa0
[  228.974304]  ret_from_fork+0x16d/0x250
[  228.974327]  ? kthread_park+0xa0/0xa0
[  228.974347]  ret_from_fork_asm+0x11/0x20
[  228.974367]  </TASK>
[  228.974382] ---[ end trace 0000000000000000 ]---