[  593.282609] ------------[ cut here ]------------
[  593.282664] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/735
[  593.282730] Modules linked in:
[  593.282761] CPU: 3 UID: 0 PID: 735 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  593.282828] Tainted: [W]=WARN
[  593.282851] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  593.282887] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  593.282919] 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
[  593.283033] RSP: 0018:ff71d8c680ab7cc8 EFLAGS: 00010286
[  593.283063] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  593.283118] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30daf00
[  593.283162] RBP: 0000000000000000 R08: ff3cc9a4c198d590 R09: ff3cc9a4c4cf202c
[  593.283206] R10: ff3cc9a4c1e97118 R11: fefefefefefefeff R12: 0000000000000000
[  593.283248] R13: 0000000000000010 R14: ff3cc9a4c1e97000 R15: ff3cc9a4c30daf00
[  593.283294] FS:  00007f6d9cf3c740(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  593.283341] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  593.283373] CR2: 000055b4957d3008 CR3: 0000000003277002 CR4: 0000000000771ef0
[  593.283419] PKRU: 55555554
[  593.283435] Call Trace:
[  593.283455]  <TASK>
[  593.283473]  rtmsg_ifinfo+0x3c/0xa0
[  593.283496]  register_netdevice+0x889/0x9f0
[  593.283517]  register_netdev+0x1e/0x30
[  593.283542]  loopback_net_init+0x57/0xb0
[  593.283570]  ? vsock_sysctl_init_net+0xb6/0x140
[  593.283602]  ops_init+0x68/0x140
[  593.283626]  setup_net+0x85/0x150
[  593.283651]  copy_net_ns+0xf5/0x200
[  593.283675]  create_new_namespaces+0x117/0x2f0
[  593.283705]  unshare_nsproxy_namespaces+0x85/0xb0
[  593.283731]  ksys_unshare+0x346/0x5e0
[  593.283756]  __x64_sys_unshare+0x12/0x20
[  593.283776]  do_syscall_64+0x104/0xfc0
[  593.283799]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  593.283828] RIP: 0033:0x7f6d9d037bcb
[  593.283850] 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
[  593.283953] RSP: 002b:00007ffe681ea7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  593.283996] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6d9d037bcb
[  593.284036] RDX: 0000000000000000 RSI: 00007ffe681ea560 RDI: 0000000040000000
[  593.284076] RBP: 00007ffe681eab80 R08: 00007ffe681ea750 R09: 0000000000000000
[  593.284121] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  593.284158] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055b46d756b68
[  593.284201]  </TASK>
[  593.284217] ---[ end trace 0000000000000000 ]---
[  593.284979] ------------[ cut here ]------------
[  593.285024] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/735
[  593.285082] Modules linked in:
[  593.285103] CPU: 3 UID: 0 PID: 735 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  593.285162] Tainted: [W]=WARN
[  593.285185] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  593.285223] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  593.285254] 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
[  593.285361] RSP: 0018:ff71d8c680ab7d68 EFLAGS: 00010286
[  593.285397] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  593.285449] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30daf00
[  593.285494] RBP: 0000000000000000 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c4c41030
[  593.285537] R10: ff3cc9a4c2eb4118 R11: fefefefefefefeff R12: 0000000000000000
[  593.285579] R13: 0000000000000010 R14: ff3cc9a4c2eb4000 R15: ff3cc9a4c30daf00
[  593.285624] FS:  000000000b4ca400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  593.285668] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  593.285703] CR2: 00007f3213aa2000 CR3: 00000000012e2003 CR4: 0000000000771ef0
[  593.285746] PKRU: 55555554
[  593.285760] Call Trace:
[  593.285775]  <TASK>
[  593.285790]  rtmsg_ifinfo+0x3c/0xa0
[  593.285812]  register_netdevice+0x889/0x9f0
[  593.285832]  __tun_chr_ioctl+0x83c/0x16c0
[  593.285856]  ? do_sys_openat2+0x9a/0xe0
[  593.285881]  __x64_sys_ioctl+0xa1/0xe0
[  593.285904]  do_syscall_64+0x104/0xfc0
[  593.285927]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  593.285964] RIP: 0033:0x47cc8d
[  593.285986] 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
[  593.286087] RSP: 002b:00007ffd12ff7030 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  593.286127] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  593.286170] RDX: 00007ffd12ff70b0 RSI: 00000000400454ca RDI: 0000000000000005
[  593.286212] RBP: 00007ffd12ff7080 R08: 0000000000000000 R09: 0000000000000000
[  593.286252] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd12ff7588
[  593.286296] R13: 00007ffd12ff7608 R14: 0000000000000002 R15: 0000000000543540
[  593.286339]  </TASK>
[  593.286358] ---[ end trace 0000000000000000 ]---
[  593.286412] ------------[ cut here ]------------
[  593.286440] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/735
[  593.286494] Modules linked in:
[  593.286514] CPU: 3 UID: 0 PID: 735 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  593.286573] Tainted: [W]=WARN
[  593.286593] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  593.286629] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  593.286661] 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
[  593.286757] RSP: 0018:ff71d8c680ab7d60 EFLAGS: 00010286
[  593.286788] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  593.286832] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30daf00
[  593.286877] RBP: 0000000000000002 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c4c41030
[  593.286919] R10: ff3cc9a4c2eb4118 R11: fefefefefefefeff R12: 0000000000000000
[  593.286967] R13: 0000000000000010 R14: ff3cc9a4c2eb4000 R15: ff3cc9a4c30daf00
[  593.287012] FS:  000000000b4ca400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  593.287057] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  593.287096] CR2: 00007f3213aa2000 CR3: 00000000012e2003 CR4: 0000000000771ef0
[  593.287137] PKRU: 55555554
[  593.287152] Call Trace:
[  593.287168]  <TASK>
[  593.287183]  rtnetlink_event+0x6e/0xb0
[  593.287205]  notifier_call_chain+0x6d/0x100
[  593.287230]  netdev_update_features+0x56/0x60
[  593.287256]  __tun_chr_ioctl+0xbf1/0x16c0
[  593.287278]  ? file_init_path+0x62/0x120
[  593.287302]  __x64_sys_ioctl+0xa1/0xe0
[  593.287323]  do_syscall_64+0x104/0xfc0
[  593.287345]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  593.287374] RIP: 0033:0x47cc8d
[  593.287402] 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
[  593.287500] RSP: 002b:00007ffd12ff7070 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  593.287543] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  593.287585] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  593.287628] RBP: 00007ffd12ff70c0 R08: 0000000000000005 R09: 0000000000001ff0
[  593.287669] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffd12ff7588
[  593.287710] R13: 00007ffd12ff7608 R14: 0000000000000002 R15: 0000000000543540
[  593.287754]  </TASK>
[  593.287769] ---[ end trace 0000000000000000 ]---
[  593.287815] ------------[ cut here ]------------
[  593.287845] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/735
[  593.287895] Modules linked in:
[  593.287916] CPU: 3 UID: 0 PID: 735 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  593.287976] Tainted: [W]=WARN
[  593.287996] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  593.288031] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  593.288062] 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
[  593.288158] RSP: 0018:ff71d8c680ab7c10 EFLAGS: 00010286
[  593.288187] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  593.288229] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30daf00
[  593.288271] RBP: 0000000000000000 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c2e5f030
[  593.288314] R10: ff3cc9a4c2eb4118 R11: fefefefefefefeff R12: 0000000000000000
[  593.288355] R13: 0000000000000010 R14: ff3cc9a4c2eb4000 R15: ff3cc9a4c30daf00
[  593.288404] FS:  000000000b4ca400(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  593.288444] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  593.288479] CR2: 00007f3213aa2000 CR3: 00000000012e2003 CR4: 0000000000771ef0
[  593.288521] PKRU: 55555554
[  593.288535] Call Trace:
[  593.288548]  <TASK>
[  593.288560]  rtmsg_ifinfo+0x3c/0xa0
[  593.288583]  __dev_notify_flags+0xb1/0xf0
[  593.288606]  netif_change_flags+0x54/0x70
[  593.288630]  dev_change_flags+0x45/0x80
[  593.288652]  devinet_ioctl+0x607/0x7f0
[  593.288676]  inet_ioctl+0x229/0x240
[  593.288699]  ? __rtnl_unlock+0x35/0x60
[  593.288721]  sock_do_ioctl+0x75/0x140
[  593.288746]  __x64_sys_ioctl+0xa1/0xe0
[  593.288766]  do_syscall_64+0x104/0xfc0
[  593.288786]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  593.288815] RIP: 0033:0x47cc8d
[  593.288835] 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
[  593.288931] RSP: 002b:00007ffd12ff7050 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  593.288974] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  593.289007] RDX: 00007ffd12ff70c0 RSI: 0000000000008914 RDI: 0000000000000006
[  593.289053] RBP: 00007ffd12ff70a0 R08: 0000000000000005 R09: 0000000000001ff0
[  593.289095] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffd12ff7588
[  593.289140] R13: 00007ffd12ff7608 R14: 0000000000000002 R15: 0000000000543540
[  593.289184]  </TASK>
[  593.289197] ---[ end trace 0000000000000000 ]---
[  638.267754] ------------[ cut here ]------------
[  638.267842] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/735
[  638.267912] Modules linked in:
[  638.267938] CPU: 3 UID: 0 PID: 735 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  638.268004] Tainted: [W]=WARN
[  638.268030] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  638.268072] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  638.268097] 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
[  638.268196] RSP: 0018:ff71d8c680ab7b58 EFLAGS: 00010286
[  638.268227] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  638.268268] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77600
[  638.268312] RBP: 0000000000000000 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c2e5f030
[  638.268354] R10: ff3cc9a4c2eb4118 R11: fefefefefefefeff R12: 0000000000000000
[  638.268396] R13: 0000000000000010 R14: ff3cc9a4c2eb4000 R15: ff3cc9a4c2b77600
[  638.268443] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  638.268490] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  638.268531] CR2: 00007f3213aa2000 CR3: 0000000013a42006 CR4: 0000000000771ef0
[  638.268580] PKRU: 55555554
[  638.268594] Call Trace:
[  638.268611]  <TASK>
[  638.268628]  rtmsg_ifinfo+0x3c/0xa0
[  638.268653]  netif_close_many+0xed/0x190
[  638.268676]  unregister_netdevice_many_notify+0x267/0x9d0
[  638.268710]  ? __queue_work+0x141/0x550
[  638.268737]  unregister_netdevice_queue+0x9e/0xd0
[  638.268772]  __tun_detach+0x591/0x5b0
[  638.268801]  tun_chr_close+0x3f/0xc0
[  638.268826]  __fput+0xe8/0x2c0
[  638.268854]  task_work_run+0x63/0xa0
[  638.268876]  do_exit+0x2c1/0xba0
[  638.268902]  ? netlink_recvmsg+0x18d/0x310
[  638.268929]  do_group_exit+0x2d/0xc0
[  638.268950]  get_signal+0x82e/0x900
[  638.268975]  arch_do_signal_or_restart+0x77/0x2b0
[  638.269009]  exit_to_user_mode_loop+0x75/0x4a0
[  638.269040]  do_syscall_64+0x439/0xfc0
[  638.269067]  ? __sysvec_call_function_single+0x20/0xd0
[  638.269099]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  638.269131] RIP: 0033:0x4c2d9e
[  638.269155] Code: Unable to access opcode bytes at 0x4c2d74.
[  638.269189] RSP: 002b:00007ffd12ff69e0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  638.269233] RAX: 0000000000000014 RBX: 00007ffd12ff6a70 RCX: 00000000004c2d9e
[  638.269276] RDX: 0000000000000000 RSI: 00007ffd12ff6a80 RDI: 0000000000000007
[  638.269317] RBP: 00007ffd12ff69f0 R08: 0000000000000000 R09: 0000000000000000
[  638.269362] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd12ff6a64
[  638.269402] R13: 0000000000000050 R14: 00007ffd12ff6bb0 R15: 0000000000000000
[  638.269444]  </TASK>
[  638.269459] ---[ end trace 0000000000000000 ]---
[  638.269584] ------------[ cut here ]------------
[  638.269619] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/735
[  638.269673] Modules linked in:
[  638.269697] CPU: 3 UID: 0 PID: 735 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  638.269757] Tainted: [W]=WARN
[  638.269777] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  638.269814] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  638.269838] 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
[  638.269938] RSP: 0018:ff71d8c680ab7bc8 EFLAGS: 00010286
[  638.270576] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  638.270621] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b77600
[  638.270673] RBP: 0000000000000000 R08: ff3cc9a4c33773d0 R09: ff3cc9a4c185f830
[  638.270762] R10: ff3cc9a4c2eb4118 R11: fefefefefefefeff R12: 0000000000000000
[  638.270852] R13: 0000000000000011 R14: ff3cc9a4c2eb4000 R15: ff3cc9a4c2b77600
[  638.270936] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  638.271000] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  638.271053] CR2: 0000560d687c5c30 CR3: 0000000013a42006 CR4: 0000000000771ef0
[  638.271121] PKRU: 55555554
[  638.271162] Call Trace:
[  638.271195]  <TASK>
[  638.271228]  unregister_netdevice_many_notify+0x877/0x9d0
[  638.271288]  unregister_netdevice_queue+0x9e/0xd0
[  638.271354]  __tun_detach+0x591/0x5b0
[  638.271383]  tun_chr_close+0x3f/0xc0
[  638.271424]  __fput+0xe8/0x2c0
[  638.271471]  task_work_run+0x63/0xa0
[  638.271492]  do_exit+0x2c1/0xba0
[  638.271527]  ? netlink_recvmsg+0x18d/0x310
[  638.271570]  do_group_exit+0x2d/0xc0
[  638.271618]  get_signal+0x82e/0x900
[  638.271661]  arch_do_signal_or_restart+0x77/0x2b0
[  638.271722]  exit_to_user_mode_loop+0x75/0x4a0
[  638.271765]  do_syscall_64+0x439/0xfc0
[  638.271798]  ? __sysvec_call_function_single+0x20/0xd0
[  638.271865]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  638.271903] RIP: 0033:0x4c2d9e
[  638.271944] Code: Unable to access opcode bytes at 0x4c2d74.
[  638.272008] RSP: 002b:00007ffd12ff69e0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  638.272097] RAX: 0000000000000014 RBX: 00007ffd12ff6a70 RCX: 00000000004c2d9e
[  638.272163] RDX: 0000000000000000 RSI: 00007ffd12ff6a80 RDI: 0000000000000007
[  638.272251] RBP: 00007ffd12ff69f0 R08: 0000000000000000 R09: 0000000000000000
[  638.272358] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd12ff6a64
[  638.272439] R13: 0000000000000050 R14: 00007ffd12ff6bb0 R15: 0000000000000000
[  638.272480]  </TASK>
[  638.272536] ---[ end trace 0000000000000000 ]---
[  638.284079] ------------[ cut here ]------------
[  638.284119] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:1/65
[  638.284180] Modules linked in:
[  638.284205] CPU: 1 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  638.284269] Tainted: [W]=WARN
[  638.284291] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  638.284322] Workqueue: netns cleanup_net
[  638.284347] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  638.284371] 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
[  638.284466] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  638.284490] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  638.284542] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b63600
[  638.284583] RBP: 0000000000000000 R08: ff3cc9a4c198d590 R09: ff3cc9a4c6db202c
[  638.284624] R10: ff3cc9a4c1e97118 R11: fefefefefefefeff R12: 0000000000000000
[  638.284668] R13: 0000000000000011 R14: ff3cc9a4c1e97000 R15: ff3cc9a4c2b63600
[  638.284714] FS:  0000000000000000(0000) GS:ff3cc9a545f16000(0000) knlGS:0000000000000000
[  638.284756] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  638.284794] CR2: 00005652f65682b8 CR3: 0000000003004003 CR4: 0000000000771ef0
[  638.284840] PKRU: 55555554
[  638.284855] Call Trace:
[  638.284870]  <TASK>
[  638.284888]  unregister_netdevice_many_notify+0x877/0x9d0
[  638.284918]  default_device_exit_batch+0x318/0x390
[  638.284954]  ops_undo_list+0x10b/0x240
[  638.284980]  cleanup_net+0x1d7/0x2e0
[  638.285001]  process_one_work+0x162/0x360
[  638.285027]  worker_thread+0x16e/0x2d0
[  638.285049]  ? rescuer_thread+0x510/0x510
[  638.285071]  kthread+0xe1/0x120
[  638.285094]  ? kthread_park+0xa0/0xa0
[  638.285121]  ret_from_fork+0x16d/0x250
[  638.285145]  ? kthread_park+0xa0/0xa0
[  638.285165]  ret_from_fork_asm+0x11/0x20
[  638.285194]  </TASK>
[  638.285209] ---[ end trace 0000000000000000 ]---