[    2.424021] ------------[ cut here ]------------
[    2.424094] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/157
[    2.424159] Modules linked in:
[    2.424187] CPU: 0 UID: 0 PID: 157 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.424262] Tainted: [W]=WARN
[    2.424287] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.424329] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.424362] 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
[    2.424480] RSP: 0018:ff7c3f6280387cc8 EFLAGS: 00010286
[    2.424512] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.424563] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff426025c317ae00
[    2.424615] RBP: 0000000000000000 R08: ff426025c193dcd0 R09: ff426025c496302c
[    2.424663] R10: ff426025c304e118 R11: fefefefefefefeff R12: 0000000000000000
[    2.424711] R13: 0000000000000010 R14: ff426025c304e000 R15: ff426025c317ae00
[    2.424760] FS:  00007f9cdf89a740(0000) GS:ff42602661e96000(0000) knlGS:0000000000000000
[    2.424804] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.424842] CR2: 000055bb73abc310 CR3: 0000000004a4b002 CR4: 0000000000771ef0
[    2.424887] PKRU: 55555554
[    2.424903] Call Trace:
[    2.424920]  <TASK>
[    2.424940]  rtmsg_ifinfo+0x3c/0xa0
[    2.424966]  register_netdevice+0x889/0x9f0
[    2.424989]  register_netdev+0x1e/0x30
[    2.425013]  loopback_net_init+0x57/0xb0
[    2.425038]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.425072]  ops_init+0x68/0x140
[    2.425097]  setup_net+0x85/0x150
[    2.425123]  copy_net_ns+0xf5/0x200
[    2.425146]  create_new_namespaces+0x117/0x2f0
[    2.425181]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.425212]  ksys_unshare+0x346/0x5e0
[    2.425241]  __x64_sys_unshare+0x12/0x20
[    2.425266]  do_syscall_64+0x104/0xfc0
[    2.425295]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.425329] RIP: 0033:0x7f9cdf995bcb
[    2.425354] 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
[    2.425463] RSP: 002b:00007ffd42329448 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.425506] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9cdf995bcb
[    2.425555] RDX: 0000000000000000 RSI: 00007ffd423291b0 RDI: 0000000040000000
[    2.425603] RBP: 00007ffd423297d0 R08: 00007ffd423293a0 R09: 0000000000000000
[    2.425649] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.425693] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055bb73abfb68
[    2.425739]  </TASK>
[    2.425755] ---[ end trace 0000000000000000 ]---
[    2.429537] ------------[ cut here ]------------
[    2.429577] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/157
[    2.429640] Modules linked in:
[    2.429663] CPU: 0 UID: 0 PID: 157 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.429728] Tainted: [W]=WARN
[    2.429751] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.429790] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.429822] 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
[    2.429932] RSP: 0018:ff7c3f6280387d68 EFLAGS: 00010286
[    2.429965] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.430014] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff426025c317ae00
[    2.430058] RBP: 0000000000000000 R08: ff426025c32e29d0 R09: ff426025c4960030
[    2.430102] R10: ff426025c498c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.430148] R13: 0000000000000010 R14: ff426025c498c000 R15: ff426025c317ae00
[    2.430199] FS:  0000000025682400(0000) GS:ff42602661e96000(0000) knlGS:0000000000000000
[    2.430252] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.430292] CR2: 00007fc05fc7d000 CR3: 0000000004923003 CR4: 0000000000771ef0
[    2.430344] PKRU: 55555554
[    2.430360] Call Trace:
[    2.430375]  <TASK>
[    2.430392]  rtmsg_ifinfo+0x3c/0xa0
[    2.430417]  register_netdevice+0x889/0x9f0
[    2.430440]  __tun_chr_ioctl+0x83c/0x16c0
[    2.430471]  ? do_sys_openat2+0x9a/0xe0
[    2.430497]  __x64_sys_ioctl+0xa1/0xe0
[    2.430523]  do_syscall_64+0x104/0xfc0
[    2.430546]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.430580] RIP: 0033:0x47cc8d
[    2.430604] 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
[    2.430711] RSP: 002b:00007ffc72b1bba0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.430758] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.430803] RDX: 00007ffc72b1bc20 RSI: 00000000400454ca RDI: 0000000000000005
[    2.430848] RBP: 00007ffc72b1bbf0 R08: 0000000000000000 R09: 0000000000000000
[    2.430893] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc72b1c0f8
[    2.430938] R13: 00007ffc72b1c178 R14: 0000000000000002 R15: 0000000000543540
[    2.430986]  </TASK>
[    2.431001] ---[ end trace 0000000000000000 ]---
[    2.431050] ------------[ cut here ]------------
[    2.431093] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/157
[    2.431160] Modules linked in:
[    2.431186] CPU: 0 UID: 0 PID: 157 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.431253] Tainted: [W]=WARN
[    2.431277] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.431315] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.431346] 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
[    2.431456] RSP: 0018:ff7c3f6280387d60 EFLAGS: 00010286
[    2.431488] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.431534] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff426025c317ae00
[    2.431580] RBP: 0000000000000002 R08: ff426025c32e29d0 R09: ff426025c4960030
[    2.431627] R10: ff426025c498c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.431678] R13: 0000000000000010 R14: ff426025c498c000 R15: ff426025c317ae00
[    2.431726] FS:  0000000025682400(0000) GS:ff42602661e96000(0000) knlGS:0000000000000000
[    2.431775] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.431812] CR2: 00007fc05fc7d000 CR3: 0000000004923003 CR4: 0000000000771ef0
[    2.431857] PKRU: 55555554
[    2.431871] Call Trace:
[    2.431892]  <TASK>
[    2.431907]  rtnetlink_event+0x6e/0xb0
[    2.431930]  notifier_call_chain+0x6d/0x100
[    2.431954]  netdev_update_features+0x56/0x60
[    2.431988]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.432013]  ? file_init_path+0x62/0x120
[    2.432045]  __x64_sys_ioctl+0xa1/0xe0
[    2.432070]  do_syscall_64+0x104/0xfc0
[    2.432094]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.432125] RIP: 0033:0x47cc8d
[    2.432152] 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
[    2.432268] RSP: 002b:00007ffc72b1bbe0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.432317] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.432366] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.432410] RBP: 00007ffc72b1bc30 R08: 0000000000000000 R09: 0000000000000000
[    2.432462] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc72b1c0f8
[    2.432513] R13: 00007ffc72b1c178 R14: 0000000000000002 R15: 0000000000543540
[    2.432557]  </TASK>
[    2.432574] ---[ end trace 0000000000000000 ]---
[    2.432620] ------------[ cut here ]------------
[    2.432651] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/157
[    2.432706] Modules linked in:
[    2.432729] CPU: 0 UID: 0 PID: 157 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.432791] Tainted: [W]=WARN
[    2.432813] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.432853] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.432884] 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
[    2.432991] RSP: 0018:ff7c3f6280387c10 EFLAGS: 00010286
[    2.433019] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.433064] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff426025c317ae00
[    2.433107] RBP: 0000000000000000 R08: ff426025c32e29d0 R09: ff426025c4965030
[    2.433152] R10: ff426025c498c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.433195] R13: 0000000000000010 R14: ff426025c498c000 R15: ff426025c317ae00
[    2.433247] FS:  0000000025682400(0000) GS:ff42602661e96000(0000) knlGS:0000000000000000
[    2.433299] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.433333] CR2: 00007fc05fc7d000 CR3: 0000000004923003 CR4: 0000000000771ef0
[    2.433379] PKRU: 55555554
[    2.433395] Call Trace:
[    2.433412]  <TASK>
[    2.433428]  rtmsg_ifinfo+0x3c/0xa0
[    2.433454]  __dev_notify_flags+0xb1/0xf0
[    2.433480]  netif_change_flags+0x54/0x70
[    2.433505]  dev_change_flags+0x45/0x80
[    2.433529]  devinet_ioctl+0x607/0x7f0
[    2.433557]  inet_ioctl+0x229/0x240
[    2.433583]  ? __rtnl_unlock+0x35/0x60
[    2.433608]  sock_do_ioctl+0x75/0x140
[    2.433637]  __x64_sys_ioctl+0xa1/0xe0
[    2.433663]  do_syscall_64+0x104/0xfc0
[    2.433686]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.433718] RIP: 0033:0x47cc8d
[    2.433742] 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
[    2.433854] RSP: 002b:00007ffc72b1bbc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.433900] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.433947] RDX: 00007ffc72b1bc30 RSI: 0000000000008914 RDI: 0000000000000006
[    2.433994] RBP: 00007ffc72b1bc10 R08: 0000000000000000 R09: 0000000000000000
[    2.434040] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc72b1c0f8
[    2.434085] R13: 00007ffc72b1c178 R14: 0000000000000002 R15: 0000000000543540
[    2.434131]  </TASK>
[    2.434145] ---[ end trace 0000000000000000 ]---
[   47.401436] ------------[ cut here ]------------
[   47.401691] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/157
[   47.401760] Modules linked in:
[   47.401788] CPU: 0 UID: 0 PID: 157 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.401858] Tainted: [W]=WARN
[   47.401881] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.401926] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.401958] 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
[   47.402054] RSP: 0018:ff7c3f6280387b58 EFLAGS: 00010286
[   47.402082] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.402129] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff426025c3165200
[   47.402169] RBP: 0000000000000000 R08: ff426025c32e29d0 R09: ff426025c4965030
[   47.402212] R10: ff426025c498c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.402253] R13: 0000000000000010 R14: ff426025c498c000 R15: ff426025c3165200
[   47.402303] FS:  0000000000000000(0000) GS:ff42602661e96000(0000) knlGS:0000000000000000
[   47.402349] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.402382] CR2: 00005594f18ebcc0 CR3: 000000001f442001 CR4: 0000000000771ef0
[   47.402430] PKRU: 55555554
[   47.402445] Call Trace:
[   47.402462]  <TASK>
[   47.402480]  rtmsg_ifinfo+0x3c/0xa0
[   47.402506]  netif_close_many+0xed/0x190
[   47.402530]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.402560]  ? __queue_work+0x141/0x550
[   47.402588]  unregister_netdevice_queue+0x9e/0xd0
[   47.402625]  __tun_detach+0x591/0x5b0
[   47.402654]  tun_chr_close+0x3f/0xc0
[   47.402677]  __fput+0xe8/0x2c0
[   47.402704]  task_work_run+0x63/0xa0
[   47.402729]  do_exit+0x2c1/0xba0
[   47.402754]  ? __x64_sys_close+0x47/0xa0
[   47.402775]  do_group_exit+0x2d/0xc0
[   47.402798]  get_signal+0x82e/0x900
[   47.402823]  ? fsnotify_grab_connector+0x4a/0x90
[   47.402854]  arch_do_signal_or_restart+0x77/0x2b0
[   47.402885]  ? __call_rcu_common.constprop.0+0x9a/0x340
[   47.402918]  ? __fput+0x17f/0x2c0
[   47.402941]  exit_to_user_mode_loop+0x75/0x4a0
[   47.402978]  do_syscall_64+0x439/0xfc0
[   47.403011]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.403042] RIP: 0033:0x47fb83
[   47.403064] Code: Unable to access opcode bytes at 0x47fb59.
[   47.403096] RSP: 002b:00007ffc72b1b690 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   47.403146] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[   47.403193] RDX: 000000000000000e RSI: 31e63f3838da8aea RDI: 0000000000000007
[   47.403236] RBP: 00007ffc72b1bb90 R08: 0000000000000041 R09: 00000000256833e0
[   47.403280] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[   47.403324] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[   47.403366]  </TASK>
[   47.403382] ---[ end trace 0000000000000000 ]---
[   47.403497] ------------[ cut here ]------------
[   47.403528] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/157
[   47.403577] Modules linked in:
[   47.403601] CPU: 0 UID: 0 PID: 157 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.403672] Tainted: [W]=WARN
[   47.403695] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.403734] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.403765] 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
[   47.403870] RSP: 0018:ff7c3f6280387bc8 EFLAGS: 00010286
[   47.403898] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.403939] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff426025c3165200
[   47.403981] RBP: 0000000000000000 R08: ff426025c32e29d0 R09: ff426025c496a030
[   47.404029] R10: ff426025c498c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.404072] R13: 0000000000000011 R14: ff426025c498c000 R15: ff426025c3165200
[   47.404121] FS:  0000000000000000(0000) GS:ff42602661e96000(0000) knlGS:0000000000000000
[   47.404167] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.404203] CR2: 00005594f18ebcc0 CR3: 0000000004a2e002 CR4: 0000000000771ef0
[   47.404240] PKRU: 55555554
[   47.404255] Call Trace:
[   47.404270]  <TASK>
[   47.404286]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.404316]  unregister_netdevice_queue+0x9e/0xd0
[   47.404346]  __tun_detach+0x591/0x5b0
[   47.404368]  tun_chr_close+0x3f/0xc0
[   47.404388]  __fput+0xe8/0x2c0
[   47.404410]  task_work_run+0x63/0xa0
[   47.404433]  do_exit+0x2c1/0xba0
[   47.404458]  ? __x64_sys_close+0x47/0xa0
[   47.404480]  do_group_exit+0x2d/0xc0
[   47.404506]  get_signal+0x82e/0x900
[   47.404529]  ? fsnotify_grab_connector+0x4a/0x90
[   47.404560]  arch_do_signal_or_restart+0x77/0x2b0
[   47.404594]  ? __call_rcu_common.constprop.0+0x9a/0x340
[   47.404627]  ? __fput+0x17f/0x2c0
[   47.404649]  exit_to_user_mode_loop+0x75/0x4a0
[   47.404677]  do_syscall_64+0x439/0xfc0
[   47.404701]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.404732] RIP: 0033:0x47fb83
[   47.404754] Code: Unable to access opcode bytes at 0x47fb59.
[   47.404789] RSP: 002b:00007ffc72b1b690 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   47.404837] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[   47.404882] RDX: 000000000000000e RSI: 31e63f3838da8aea RDI: 0000000000000007
[   47.404930] RBP: 00007ffc72b1bb90 R08: 0000000000000041 R09: 00000000256833e0
[   47.404975] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[   47.405020] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[   47.405067]  </TASK>
[   47.405083] ---[ end trace 0000000000000000 ]---
[   47.419549] ------------[ cut here ]------------
[   47.419633] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: kworker/u16:1/65
[   47.419735] Modules linked in:
[   47.419795] CPU: 2 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.419890] Tainted: [W]=WARN
[   47.419946] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.420020] Workqueue: netns cleanup_net
[   47.420080] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.420147] 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
[   47.420288] RSP: 0018:ff7c3f628023fc78 EFLAGS: 00010286
[   47.420354] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.420435] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff426025c309c900
[   47.420523] RBP: 0000000000000000 R08: ff426025c193dcd0 R09: ff426025c310d02c
[   47.420611] R10: ff426025c304e118 R11: fefefefefefefeff R12: 0000000000000000
[   47.420691] R13: 0000000000000011 R14: ff426025c304e000 R15: ff426025c309c900
[   47.420773] FS:  0000000000000000(0000) GS:ff42602661f96000(0000) knlGS:0000000000000000
[   47.420853] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.420925] CR2: 00007f6495f3ef98 CR3: 000000001f442005 CR4: 0000000000771ef0
[   47.421009] PKRU: 55555554
[   47.421058] Call Trace:
[   47.421112]  <TASK>
[   47.421163]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.421232]  default_device_exit_batch+0x318/0x390
[   47.421298]  ops_undo_list+0x10b/0x240
[   47.421357]  cleanup_net+0x1d7/0x2e0
[   47.421416]  process_one_work+0x162/0x360
[   47.421484]  worker_thread+0x16e/0x2d0
[   47.421544]  ? rescuer_thread+0x510/0x510
[   47.421611]  kthread+0xe1/0x120
[   47.421676]  ? kthread_park+0xa0/0xa0
[   47.421734]  ret_from_fork+0x16d/0x250
[   47.421794]  ? kthread_park+0xa0/0xa0
[   47.421852]  ret_from_fork_asm+0x11/0x20
[   47.421912]  </TASK>
[   47.421961] ---[ end trace 0000000000000000 ]---