[  638.747450] ------------[ cut here ]------------
[  638.747504] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/780
[  638.747566] Modules linked in:
[  638.747587] CPU: 3 UID: 0 PID: 780 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  638.747648] Tainted: [W]=WARN
[  638.747672] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  638.747710] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  638.747743] 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
[  638.747843] RSP: 0018:ff71d8c680b77cc8 EFLAGS: 00010286
[  638.747870] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  638.747910] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77600
[  638.747960] RBP: 0000000000000000 R08: ff3cc9a4c2bbdf50 R09: ff3cc9a4c19bb02c
[  638.748004] R10: ff3cc9a4c2e5f118 R11: fefefefefefefeff R12: 0000000000000000
[  638.748048] R13: 0000000000000010 R14: ff3cc9a4c2e5f000 R15: ff3cc9a4c2b77600
[  638.748098] FS:  00007f5325888740(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  638.748145] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  638.748181] CR2: 000055a6ec881008 CR3: 0000000001967005 CR4: 0000000000771ef0
[  638.748218] PKRU: 55555554
[  638.748236] Call Trace:
[  638.748250]  <TASK>
[  638.748266]  rtmsg_ifinfo+0x3c/0xa0
[  638.748289]  register_netdevice+0x889/0x9f0
[  638.748314]  register_netdev+0x1e/0x30
[  638.748336]  loopback_net_init+0x57/0xb0
[  638.748362]  ? vsock_sysctl_init_net+0xb6/0x140
[  638.748388]  ops_init+0x68/0x140
[  638.748413]  setup_net+0x85/0x150
[  638.748436]  copy_net_ns+0xf5/0x200
[  638.748458]  create_new_namespaces+0x117/0x2f0
[  638.748491]  unshare_nsproxy_namespaces+0x85/0xb0
[  638.748526]  ksys_unshare+0x346/0x5e0
[  638.748553]  __x64_sys_unshare+0x12/0x20
[  638.748577]  do_syscall_64+0x104/0xfc0
[  638.748600]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  638.748627] RIP: 0033:0x7f5325983bcb
[  638.748652] 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
[  638.748747] RSP: 002b:00007fff5c8fa1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  638.748792] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5325983bcb
[  638.748826] RDX: 0000000000000000 RSI: 00007fff5c8f9f60 RDI: 0000000040000000
[  638.748871] RBP: 00007fff5c8fa580 R08: 00007fff5c8fa150 R09: 0000000000000000
[  638.748912] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  638.748959] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055a6c505eb68
[  638.748994]  </TASK>
[  638.749010] ---[ end trace 0000000000000000 ]---
[  638.749625] ------------[ cut here ]------------
[  638.749658] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/780
[  638.749713] Modules linked in:
[  638.749734] CPU: 3 UID: 0 PID: 780 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  638.749789] Tainted: [W]=WARN
[  638.749817] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  638.749858] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  638.749888] 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
[  638.749984] RSP: 0018:ff71d8c680b77d68 EFLAGS: 00010286
[  638.750013] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  638.750054] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77600
[  638.750097] RBP: 0000000000000000 R08: ff3cc9a4c1934ad0 R09: ff3cc9a4c1e97030
[  638.750137] R10: ff3cc9a4c4ca4118 R11: fefefefefefefeff R12: 0000000000000000
[  638.750178] R13: 0000000000000010 R14: ff3cc9a4c4ca4000 R15: ff3cc9a4c2b77600
[  638.750224] FS:  00000000267e2400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  638.750259] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  638.750293] CR2: 00007f06db6fb000 CR3: 0000000002bc7006 CR4: 0000000000771ef0
[  638.750335] PKRU: 55555554
[  638.750350] Call Trace:
[  638.750364]  <TASK>
[  638.750377]  rtmsg_ifinfo+0x3c/0xa0
[  638.750400]  register_netdevice+0x889/0x9f0
[  638.750419]  __tun_chr_ioctl+0x83c/0x16c0
[  638.750444]  ? do_sys_openat2+0x9a/0xe0
[  638.750467]  __x64_sys_ioctl+0xa1/0xe0
[  638.750491]  do_syscall_64+0x104/0xfc0
[  638.750519]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  638.750550] RIP: 0033:0x47cc8d
[  638.750575] 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
[  638.750677] RSP: 002b:00007ffc14c4e450 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  638.750726] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  638.750768] RDX: 00007ffc14c4e4d0 RSI: 00000000400454ca RDI: 0000000000000005
[  638.750809] RBP: 00007ffc14c4e4a0 R08: 0000000000000000 R09: 0000000000000000
[  638.750856] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc14c4e9a8
[  638.750895] R13: 00007ffc14c4ea28 R14: 0000000000000002 R15: 0000000000543540
[  638.750937]  </TASK>
[  638.750952] ---[ end trace 0000000000000000 ]---
[  638.750995] ------------[ cut here ]------------
[  638.751026] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/780
[  638.751079] Modules linked in:
[  638.751100] CPU: 3 UID: 0 PID: 780 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  638.751160] Tainted: [W]=WARN
[  638.751182] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  638.751217] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  638.751246] 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
[  638.751347] RSP: 0018:ff71d8c680b77d60 EFLAGS: 00010286
[  638.751373] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  638.751417] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77600
[  638.751463] RBP: 0000000000000002 R08: ff3cc9a4c1934ad0 R09: ff3cc9a4c1e97030
[  638.751506] R10: ff3cc9a4c4ca4118 R11: fefefefefefefeff R12: 0000000000000000
[  638.751552] R13: 0000000000000010 R14: ff3cc9a4c4ca4000 R15: ff3cc9a4c2b77600
[  638.751594] FS:  00000000267e2400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  638.751639] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  638.751675] CR2: 00007f06db6fb000 CR3: 0000000002bc7006 CR4: 0000000000771ef0
[  638.751714] PKRU: 55555554
[  638.751726] Call Trace:
[  638.751738]  <TASK>
[  638.751750]  rtnetlink_event+0x6e/0xb0
[  638.751770]  notifier_call_chain+0x6d/0x100
[  638.751795]  netdev_update_features+0x56/0x60
[  638.751821]  __tun_chr_ioctl+0xbf1/0x16c0
[  638.751843]  ? file_init_path+0x62/0x120
[  638.751866]  __x64_sys_ioctl+0xa1/0xe0
[  638.751885]  do_syscall_64+0x104/0xfc0
[  638.751906]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  638.751933] RIP: 0033:0x47cc8d
[  638.751958] 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
[  638.752055] RSP: 002b:00007ffc14c4e490 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  638.752100] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  638.752136] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  638.752178] RBP: 00007ffc14c4e4e0 R08: 0000000000000000 R09: 0000000000000000
[  638.752222] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc14c4e9a8
[  638.752270] R13: 00007ffc14c4ea28 R14: 0000000000000002 R15: 0000000000543540
[  638.752313]  </TASK>
[  638.752329] ---[ end trace 0000000000000000 ]---
[  638.752369] ------------[ cut here ]------------
[  638.752395] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/780
[  638.752446] Modules linked in:
[  638.752467] CPU: 3 UID: 0 PID: 780 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  638.752534] Tainted: [W]=WARN
[  638.752556] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  638.752590] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  638.752621] 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
[  638.752717] RSP: 0018:ff71d8c680b77c10 EFLAGS: 00010286
[  638.752744] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  638.752782] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77600
[  638.752822] RBP: 0000000000000000 R08: ff3cc9a4c1934ad0 R09: ff3cc9a4c4c42030
[  638.752865] R10: ff3cc9a4c4ca4118 R11: fefefefefefefeff R12: 0000000000000000
[  638.752906] R13: 0000000000000010 R14: ff3cc9a4c4ca4000 R15: ff3cc9a4c2b77600
[  638.752953] FS:  00000000267e2400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  638.753002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  638.753032] CR2: 00007f06db6fb000 CR3: 0000000002bc7006 CR4: 0000000000771ef0
[  638.753076] PKRU: 55555554
[  638.753093] Call Trace:
[  638.753106]  <TASK>
[  638.753120]  rtmsg_ifinfo+0x3c/0xa0
[  638.753144]  __dev_notify_flags+0xb1/0xf0
[  638.753167]  netif_change_flags+0x54/0x70
[  638.753190]  dev_change_flags+0x45/0x80
[  638.753213]  devinet_ioctl+0x607/0x7f0
[  638.753239]  inet_ioctl+0x229/0x240
[  638.753259]  ? __rtnl_unlock+0x35/0x60
[  638.753285]  sock_do_ioctl+0x75/0x140
[  638.753305]  __x64_sys_ioctl+0xa1/0xe0
[  638.753329]  do_syscall_64+0x104/0xfc0
[  638.753352]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  638.753381] RIP: 0033:0x47cc8d
[  638.753401] 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
[  638.753507] RSP: 002b:00007ffc14c4e470 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  638.753557] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  638.753600] RDX: 00007ffc14c4e4e0 RSI: 0000000000008914 RDI: 0000000000000006
[  638.753641] RBP: 00007ffc14c4e4c0 R08: 0000000000000000 R09: 0000000000000000
[  638.753683] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc14c4e9a8
[  638.753727] R13: 00007ffc14c4ea28 R14: 0000000000000002 R15: 0000000000543540
[  638.753770]  </TASK>
[  638.753783] ---[ end trace 0000000000000000 ]---
[  683.734155] ------------[ cut here ]------------
[  683.734223] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/780
[  683.734286] Modules linked in:
[  683.734312] CPU: 3 UID: 0 PID: 780 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  683.734376] Tainted: [W]=WARN
[  683.734401] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  683.734448] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  683.734478] 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
[  683.734579] RSP: 0018:ff71d8c680b77b58 EFLAGS: 00010286
[  683.734610] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  683.734656] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b76400
[  683.734700] RBP: 0000000000000000 R08: ff3cc9a4c1934ad0 R09: ff3cc9a4c4c42030
[  683.734742] R10: ff3cc9a4c4ca4118 R11: fefefefefefefeff R12: 0000000000000000
[  683.734786] R13: 0000000000000010 R14: ff3cc9a4c4ca4000 R15: ff3cc9a4c2b76400
[  683.734830] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  683.734873] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  683.734903] CR2: 00007f06db6fb000 CR3: 0000000013a42002 CR4: 0000000000771ef0
[  683.734952] PKRU: 55555554
[  683.734967] Call Trace:
[  683.734983]  <TASK>
[  683.734998]  rtmsg_ifinfo+0x3c/0xa0
[  683.735021]  netif_close_many+0xed/0x190
[  683.735045]  unregister_netdevice_many_notify+0x267/0x9d0
[  683.735074]  ? __queue_work+0x141/0x550
[  683.735103]  unregister_netdevice_queue+0x9e/0xd0
[  683.735136]  __tun_detach+0x591/0x5b0
[  683.735161]  tun_chr_close+0x3f/0xc0
[  683.735183]  __fput+0xe8/0x2c0
[  683.735210]  task_work_run+0x63/0xa0
[  683.735237]  do_exit+0x2c1/0xba0
[  683.735261]  ? __x64_sys_close+0x47/0xa0
[  683.735287]  do_group_exit+0x2d/0xc0
[  683.735309]  get_signal+0x82e/0x900
[  683.735331]  ? fsnotify_grab_connector+0x4a/0x90
[  683.735363]  arch_do_signal_or_restart+0x77/0x2b0
[  683.735394]  ? __call_rcu_common.constprop.0+0x9a/0x340
[  683.735426]  ? __fput+0x17f/0x2c0
[  683.735450]  exit_to_user_mode_loop+0x75/0x4a0
[  683.735483]  do_syscall_64+0x439/0xfc0
[  683.735511]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  683.735543] RIP: 0033:0x47fb83
[  683.735568] Code: Unable to access opcode bytes at 0x47fb59.
[  683.735601] RSP: 002b:00007ffc14c4df40 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  683.735645] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[  683.735694] RDX: 000000000000000e RSI: b7160ef95fa8f234 RDI: 0000000000000007
[  683.735737] RBP: 00007ffc14c4e440 R08: 0000000000000041 R09: 00000000267e33e0
[  683.735783] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[  683.735824] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[  683.735874]  </TASK>
[  683.735890] ---[ end trace 0000000000000000 ]---
[  683.736332] ------------[ cut here ]------------
[  683.736365] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/780
[  683.736419] Modules linked in:
[  683.736442] CPU: 3 UID: 0 PID: 780 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  683.736487] Tainted: [W]=WARN
[  683.736510] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  683.736546] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  683.736581] 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
[  683.736685] RSP: 0018:ff71d8c680b77bc8 EFLAGS: 00010286
[  683.736713] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  683.736754] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b76400
[  683.736796] RBP: 0000000000000000 R08: ff3cc9a4c1934ad0 R09: ff3cc9a4c6930030
[  683.736836] R10: ff3cc9a4c4ca4118 R11: fefefefefefefeff R12: 0000000000000000
[  683.736877] R13: 0000000000000011 R14: ff3cc9a4c4ca4000 R15: ff3cc9a4c2b76400
[  683.736920] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  683.736967] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  683.736997] CR2: 00007f06db6fb000 CR3: 0000000003393001 CR4: 0000000000771ef0
[  683.737039] PKRU: 55555554
[  683.737059] Call Trace:
[  683.737075]  <TASK>
[  683.737092]  unregister_netdevice_many_notify+0x877/0x9d0
[  683.737124]  unregister_netdevice_queue+0x9e/0xd0
[  683.737156]  __tun_detach+0x591/0x5b0
[  683.737177]  tun_chr_close+0x3f/0xc0
[  683.737200]  __fput+0xe8/0x2c0
[  683.737225]  task_work_run+0x63/0xa0
[  683.737249]  do_exit+0x2c1/0xba0
[  683.737272]  ? __x64_sys_close+0x47/0xa0
[  683.737295]  do_group_exit+0x2d/0xc0
[  683.737318]  get_signal+0x82e/0x900
[  683.737340]  ? fsnotify_grab_connector+0x4a/0x90
[  683.737374]  arch_do_signal_or_restart+0x77/0x2b0
[  683.737405]  ? __call_rcu_common.constprop.0+0x9a/0x340
[  683.737431]  ? __fput+0x17f/0x2c0
[  683.737454]  exit_to_user_mode_loop+0x75/0x4a0
[  683.737485]  do_syscall_64+0x439/0xfc0
[  683.737512]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  683.737543] RIP: 0033:0x47fb83
[  683.737566] Code: Unable to access opcode bytes at 0x47fb59.
[  683.737602] RSP: 002b:00007ffc14c4df40 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  683.737644] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[  683.737694] RDX: 000000000000000e RSI: b7160ef95fa8f234 RDI: 0000000000000007
[  683.737736] RBP: 00007ffc14c4e440 R08: 0000000000000041 R09: 00000000267e33e0
[  683.737780] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[  683.737820] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[  683.737870]  </TASK>
[  683.737884] ---[ end trace 0000000000000000 ]---
[  683.747084] ------------[ cut here ]------------
[  683.747135] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:1/65
[  683.747207] Modules linked in:
[  683.747231] CPU: 1 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  683.747292] Tainted: [W]=WARN
[  683.747314] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  683.747350] Workqueue: netns cleanup_net
[  683.747375] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  683.747404] 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
[  683.747491] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  683.747525] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  683.747571] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b63800
[  683.747614] RBP: 0000000000000000 R08: ff3cc9a4c2bbdf50 R09: ff3cc9a4c691c82c
[  683.747664] R10: ff3cc9a4c2e5f118 R11: fefefefefefefeff R12: 0000000000000000
[  683.747709] R13: 0000000000000011 R14: ff3cc9a4c2e5f000 R15: ff3cc9a4c2b63800
[  683.747753] FS:  0000000000000000(0000) GS:ff3cc9a545f16000(0000) knlGS:0000000000000000
[  683.747795] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  683.747830] CR2: 00005652f65682b8 CR3: 0000000003004004 CR4: 0000000000771ef0
[  683.747872] PKRU: 55555554
[  683.747887] Call Trace:
[  683.747900]  <TASK>
[  683.747916]  unregister_netdevice_many_notify+0x877/0x9d0
[  683.747950]  default_device_exit_batch+0x318/0x390
[  683.747980]  ops_undo_list+0x10b/0x240
[  683.748003]  cleanup_net+0x1d7/0x2e0
[  683.748027]  process_one_work+0x162/0x360
[  683.748053]  worker_thread+0x16e/0x2d0
[  683.748072]  ? rescuer_thread+0x510/0x510
[  683.748093]  kthread+0xe1/0x120
[  683.748116]  ? kthread_park+0xa0/0xa0
[  683.748139]  ret_from_fork+0x16d/0x250
[  683.748165]  ? kthread_park+0xa0/0xa0
[  683.748187]  ret_from_fork_asm+0x11/0x20
[  683.748214]  </TASK>
[  683.748227] ---[ end trace 0000000000000000 ]---