[    2.267909] ------------[ cut here ]------------
[    2.268007] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/160
[    2.268131] Modules linked in:
[    2.268219] CPU: 2 UID: 0 PID: 160 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.268315] Tainted: [W]=WARN
[    2.268371] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.268435] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.268497] 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
[    2.268633] RSP: 0018:ff71d8c68033fcc8 EFLAGS: 00010286
[    2.268700] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.268778] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b63200
[    2.268857] RBP: 0000000000000000 R08: ff3cc9a4c320d610 R09: ff3cc9a4c4cf202c
[    2.268936] R10: ff3cc9a4c19bd118 R11: fefefefefefefeff R12: 0000000000000000
[    2.269051] R13: 0000000000000010 R14: ff3cc9a4c19bd000 R15: ff3cc9a4c2b63200
[    2.269163] FS:  00007f5e10748740(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[    2.269263] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.269342] CR2: 000055ea22fcb310 CR3: 00000000033dd005 CR4: 0000000000771ef0
[    2.269444] PKRU: 55555554
[    2.269503] Call Trace:
[    2.269561]  <TASK>
[    2.269609]  rtmsg_ifinfo+0x3c/0xa0
[    2.269683]  register_netdevice+0x889/0x9f0
[    2.269759]  register_netdev+0x1e/0x30
[    2.269824]  loopback_net_init+0x57/0xb0
[    2.269892]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.269966]  ops_init+0x68/0x140
[    2.270042]  setup_net+0x85/0x150
[    2.270100]  copy_net_ns+0xf5/0x200
[    2.270166]  create_new_namespaces+0x117/0x2f0
[    2.270233]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.270298]  ksys_unshare+0x346/0x5e0
[    2.270357]  __x64_sys_unshare+0x12/0x20
[    2.270430]  do_syscall_64+0x104/0xfc0
[    2.270503]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.270568] RIP: 0033:0x7f5e10843bcb
[    2.270626] 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
[    2.270762] RSP: 002b:00007ffcc861db58 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.270841] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5e10843bcb
[    2.270919] RDX: 0000000000000000 RSI: 00007ffcc861d8c0 RDI: 0000000040000000
[    2.271003] RBP: 00007ffcc861dee0 R08: 00007ffcc861dab0 R09: 0000000000000000
[    2.271080] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.271158] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055ea22fceb68
[    2.271236]  </TASK>
[    2.271285] ---[ end trace 0000000000000000 ]---
[    2.274685] ------------[ cut here ]------------
[    2.274751] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.274842] Modules linked in:
[    2.274901] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.275004] Tainted: [W]=WARN
[    2.275060] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.275131] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.275196] 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
[    2.275330] RSP: 0018:ff71d8c68033fd68 EFLAGS: 00010286
[    2.275395] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.275481] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b63200
[    2.275559] RBP: 0000000000000000 R08: ff3cc9a4c2b7d0d0 R09: ff3cc9a4c4cf7030
[    2.275637] R10: ff3cc9a4c4d08118 R11: fefefefefefefeff R12: 0000000000000000
[    2.275714] R13: 0000000000000010 R14: ff3cc9a4c4d08000 R15: ff3cc9a4c2b63200
[    2.275795] FS:  000000002b48e400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[    2.275875] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.275954] CR2: 00007f56b2466000 CR3: 0000000004dfd006 CR4: 0000000000771ef0
[    2.276032] PKRU: 55555554
[    2.276082] Call Trace:
[    2.276131]  <TASK>
[    2.276180]  rtmsg_ifinfo+0x3c/0xa0
[    2.276237]  register_netdevice+0x889/0x9f0
[    2.276296]  __tun_chr_ioctl+0x83c/0x16c0
[    2.276356]  ? do_sys_openat2+0x9a/0xe0
[    2.276422]  __x64_sys_ioctl+0xa1/0xe0
[    2.276483]  do_syscall_64+0x104/0xfc0
[    2.276541]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.276606] RIP: 0033:0x47cc8d
[    2.276663] 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
[    2.276797] RSP: 002b:00007ffc5bb5e7f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.276876] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.276959] RDX: 00007ffc5bb5e870 RSI: 00000000400454ca RDI: 0000000000000005
[    2.277037] RBP: 00007ffc5bb5e840 R08: 0000000000000000 R09: 0000000000000000
[    2.277115] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5bb5ed48
[    2.277192] R13: 00007ffc5bb5edc8 R14: 0000000000000002 R15: 0000000000543540
[    2.277271]  </TASK>
[    2.277319] ---[ end trace 0000000000000000 ]---
[    2.277408] ------------[ cut here ]------------
[    2.277474] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.277560] Modules linked in:
[    2.277617] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.277710] Tainted: [W]=WARN
[    2.277766] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.277836] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.277900] 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
[    2.278039] RSP: 0018:ff71d8c68033fd60 EFLAGS: 00010286
[    2.278104] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.278182] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b63200
[    2.278261] RBP: 0000000000000002 R08: ff3cc9a4c2b7d0d0 R09: ff3cc9a4c4cf7030
[    2.278338] R10: ff3cc9a4c4d08118 R11: fefefefefefefeff R12: 0000000000000000
[    2.278420] R13: 0000000000000010 R14: ff3cc9a4c4d08000 R15: ff3cc9a4c2b63200
[    2.278504] FS:  000000002b48e400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[    2.278584] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.278654] CR2: 00007f56b2466000 CR3: 0000000004dfd006 CR4: 0000000000771ef0
[    2.278733] PKRU: 55555554
[    2.278782] Call Trace:
[    2.278830]  <TASK>
[    2.278879]  rtnetlink_event+0x6e/0xb0
[    2.278937]  notifier_call_chain+0x6d/0x100
[    2.279002]  netdev_update_features+0x56/0x60
[    2.279068]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.279125]  ? file_init_path+0x62/0x120
[    2.279184]  __x64_sys_ioctl+0xa1/0xe0
[    2.279242]  do_syscall_64+0x104/0xfc0
[    2.279300]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.279364] RIP: 0033:0x47cc8d
[    2.279426] 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
[    2.279560] RSP: 002b:00007ffc5bb5e830 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.279637] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.279715] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.279792] RBP: 00007ffc5bb5e880 R08: 0000000000000000 R09: 0000000000000000
[    2.279869] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5bb5ed48
[    2.279952] R13: 00007ffc5bb5edc8 R14: 0000000000000002 R15: 0000000000543540
[    2.280029]  </TASK>
[    2.280077] ---[ end trace 0000000000000000 ]---
[    2.280160] ------------[ cut here ]------------
[    2.280224] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.280312] Modules linked in:
[    2.280369] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.280469] Tainted: [W]=WARN
[    2.280524] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.280594] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.280659] 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
[    2.280793] RSP: 0018:ff71d8c68033fc10 EFLAGS: 00010286
[    2.280857] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.280934] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b63200
[    2.281017] RBP: 0000000000000000 R08: ff3cc9a4c2b7d0d0 R09: ff3cc9a4c4cf4030
[    2.281099] R10: ff3cc9a4c4d08118 R11: fefefefefefefeff R12: 0000000000000000
[    2.281178] R13: 0000000000000010 R14: ff3cc9a4c4d08000 R15: ff3cc9a4c2b63200
[    2.281259] FS:  000000002b48e400(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[    2.281338] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.281415] CR2: 00007f56b2466000 CR3: 0000000004dfd006 CR4: 0000000000771ef0
[    2.281495] PKRU: 55555554
[    2.281544] Call Trace:
[    2.281593]  <TASK>
[    2.281642]  rtmsg_ifinfo+0x3c/0xa0
[    2.281700]  __dev_notify_flags+0xb1/0xf0
[    2.281758]  netif_change_flags+0x54/0x70
[    2.281816]  dev_change_flags+0x45/0x80
[    2.281873]  devinet_ioctl+0x607/0x7f0
[    2.281933]  inet_ioctl+0x229/0x240
[    2.281997]  ? __rtnl_unlock+0x35/0x60
[    2.282055]  sock_do_ioctl+0x75/0x140
[    2.282114]  __x64_sys_ioctl+0xa1/0xe0
[    2.282172]  do_syscall_64+0x104/0xfc0
[    2.282230]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.282294] RIP: 0033:0x47cc8d
[    2.282351] 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
[    2.282489] RSP: 002b:00007ffc5bb5e810 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.282568] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.282645] RDX: 00007ffc5bb5e880 RSI: 0000000000008914 RDI: 0000000000000006
[    2.282721] RBP: 00007ffc5bb5e860 R08: 0000000000000000 R09: 0000000000000000
[    2.282799] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5bb5ed48
[    2.282875] R13: 00007ffc5bb5edc8 R14: 0000000000000002 R15: 0000000000543540
[    2.282960]  </TASK>
[    2.283009] ---[ end trace 0000000000000000 ]---
[   47.249509] ------------[ cut here ]------------
[   47.249626] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[   47.249748] Modules linked in:
[   47.249808] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.249899] Tainted: [W]=WARN
[   47.249967] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.250042] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.250108] 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
[   47.250248] RSP: 0018:ff71d8c68033fb58 EFLAGS: 00010286
[   47.250312] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.250433] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[   47.250511] RBP: 0000000000000000 R08: ff3cc9a4c2b7d0d0 R09: ff3cc9a4c4cf4030
[   47.250595] R10: ff3cc9a4c4d08118 R11: fefefefefefefeff R12: 0000000000000000
[   47.250673] R13: 0000000000000010 R14: ff3cc9a4c4d08000 R15: ff3cc9a4c2b5d900
[   47.250757] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[   47.250837] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.250909] CR2: 00007f56b2466000 CR3: 0000000013a42003 CR4: 0000000000771ef0
[   47.251249] PKRU: 55555554
[   47.251302] Call Trace:
[   47.251353]  <TASK>
[   47.251403]  rtmsg_ifinfo+0x3c/0xa0
[   47.251462]  netif_close_many+0xed/0x190
[   47.251521]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.251593]  ? __queue_work+0x141/0x550
[   47.251653]  unregister_netdevice_queue+0x9e/0xd0
[   47.251717]  __tun_detach+0x591/0x5b0
[   47.251777]  tun_chr_close+0x3f/0xc0
[   47.251834]  __fput+0xe8/0x2c0
[   47.251895]  task_work_run+0x63/0xa0
[   47.251960]  do_exit+0x2c1/0xba0
[   47.252020]  ? __x64_sys_close+0x47/0xa0
[   47.252078]  do_group_exit+0x2d/0xc0
[   47.252137]  get_signal+0x82e/0x900
[   47.252196]  ? fsnotify_grab_connector+0x4a/0x90
[   47.252262]  arch_do_signal_or_restart+0x77/0x2b0
[   47.252329]  ? __call_rcu_common.constprop.0+0x9a/0x340
[   47.252396]  ? __fput+0x17f/0x2c0
[   47.252454]  exit_to_user_mode_loop+0x75/0x4a0
[   47.252520]  do_syscall_64+0x439/0xfc0
[   47.252585]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.252651] RIP: 0033:0x47fb83
[   47.252708] Code: Unable to access opcode bytes at 0x47fb59.
[   47.252778] RSP: 002b:00007ffc5bb5e2e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   47.252856] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[   47.252934] RDX: 000000000000000e RSI: bb52de9051a18431 RDI: 0000000000000007
[   47.253017] RBP: 00007ffc5bb5e7e0 R08: 0000000000000041 R09: 000000002b48f3e0
[   47.253099] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[   47.253177] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[   47.253255]  </TASK>
[   47.253303] ---[ end trace 0000000000000000 ]---
[   47.253446] ------------[ cut here ]------------
[   47.253511] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[   47.253605] Modules linked in:
[   47.253663] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.253757] Tainted: [W]=WARN
[   47.253813] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.253882] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.253953] 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
[   47.254092] RSP: 0018:ff71d8c68033fbc8 EFLAGS: 00010286
[   47.254158] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.254236] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d900
[   47.254313] RBP: 0000000000000000 R08: ff3cc9a4c2b7d0d0 R09: ff3cc9a4c4f73030
[   47.254391] R10: ff3cc9a4c4d08118 R11: fefefefefefefeff R12: 0000000000000000
[   47.254469] R13: 0000000000000011 R14: ff3cc9a4c4d08000 R15: ff3cc9a4c2b5d900
[   47.254553] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[   47.254637] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.254708] CR2: 00007f56b2466000 CR3: 0000000004e3f001 CR4: 0000000000771ef0
[   47.254788] PKRU: 55555554
[   47.254836] Call Trace:
[   47.254885]  <TASK>
[   47.254933]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.255153]  unregister_netdevice_queue+0x9e/0xd0
[   47.255221]  __tun_detach+0x591/0x5b0
[   47.255280]  tun_chr_close+0x3f/0xc0
[   47.255337]  __fput+0xe8/0x2c0
[   47.255396]  task_work_run+0x63/0xa0
[   47.255454]  do_exit+0x2c1/0xba0
[   47.255511]  ? __x64_sys_close+0x47/0xa0
[   47.255569]  do_group_exit+0x2d/0xc0
[   47.255632]  get_signal+0x82e/0x900
[   47.255690]  ? fsnotify_grab_connector+0x4a/0x90
[   47.255755]  arch_do_signal_or_restart+0x77/0x2b0
[   47.255823]  ? __call_rcu_common.constprop.0+0x9a/0x340
[   47.255889]  ? __fput+0x17f/0x2c0
[   47.255953]  exit_to_user_mode_loop+0x75/0x4a0
[   47.256019]  do_syscall_64+0x439/0xfc0
[   47.256078]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.256143] RIP: 0033:0x47fb83
[   47.256200] Code: Unable to access opcode bytes at 0x47fb59.
[   47.256271] RSP: 002b:00007ffc5bb5e2e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   47.256351] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[   47.256431] RDX: 000000000000000e RSI: bb52de9051a18431 RDI: 0000000000000007
[   47.256509] RBP: 00007ffc5bb5e7e0 R08: 0000000000000041 R09: 000000002b48f3e0
[   47.256596] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[   47.256678] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[   47.256755]  </TASK>
[   47.256803] ---[ end trace 0000000000000000 ]---
[   47.265072] ------------[ cut here ]------------
[   47.265111] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:1/65
[   47.265178] Modules linked in:
[   47.265202] CPU: 1 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.265262] Tainted: [W]=WARN
[   47.265286] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.265323] Workqueue: netns cleanup_net
[   47.265345] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.265373] 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
[   47.265471] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[   47.265497] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.265539] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d700
[   47.265583] RBP: 0000000000000000 R08: ff3cc9a4c320d610 R09: ff3cc9a4c313202c
[   47.265626] R10: ff3cc9a4c19bd118 R11: fefefefefefefeff R12: 0000000000000000
[   47.265665] R13: 0000000000000011 R14: ff3cc9a4c19bd000 R15: ff3cc9a4c2b5d700
[   47.265709] FS:  0000000000000000(0000) GS:ff3cc9a545f16000(0000) knlGS:0000000000000000
[   47.265752] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.265788] CR2: 00007efc6c22f770 CR3: 0000000013a42003 CR4: 0000000000771ef0
[   47.265835] PKRU: 55555554
[   47.265851] Call Trace:
[   47.265867]  <TASK>
[   47.265884]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.265913]  default_device_exit_batch+0x318/0x390
[   47.265948]  ops_undo_list+0x10b/0x240
[   47.265974]  cleanup_net+0x1d7/0x2e0
[   47.265998]  process_one_work+0x162/0x360
[   47.266024]  worker_thread+0x16e/0x2d0
[   47.266047]  ? rescuer_thread+0x510/0x510
[   47.266071]  kthread+0xe1/0x120
[   47.266090]  ? kthread_park+0xa0/0xa0
[   47.266111]  ret_from_fork+0x16d/0x250
[   47.266132]  ? kthread_park+0xa0/0xa0
[   47.266152]  ret_from_fork_asm+0x11/0x20
[   47.266174]  </TASK>
[   47.266189] ---[ end trace 0000000000000000 ]---