[    2.484447] ------------[ cut here ]------------
[    2.484541] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/160
[    2.484661] Modules linked in:
[    2.484743] CPU: 2 UID: 0 PID: 160 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.484861] Tainted: [W]=WARN
[    2.484919] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.485022] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.485113] 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
[    2.485270] RSP: 0018:ff593db8403cfcc8 EFLAGS: 00010286
[    2.485355] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.485451] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1e0b8cc1cf1200
[    2.485555] RBP: 0000000000000000 R08: ff1e0b8cc2ef9910 R09: ff1e0b8cc31d402c
[    2.485642] R10: ff1e0b8cc31d7118 R11: fefefefefefefeff R12: 0000000000000000
[    2.485743] R13: 0000000000000010 R14: ff1e0b8cc31d7000 R15: ff1e0b8cc1cf1200
[    2.485843] FS:  00007f6eef46b740(0000) GS:ff1e0b8d49196000(0000) knlGS:0000000000000000
[    2.485935] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.486006] CR2: 0000560cc440e310 CR3: 0000000004b6d002 CR4: 0000000000771ef0
[    2.486135] PKRU: 55555554
[    2.486197] Call Trace:
[    2.486286]  <TASK>
[    2.486361]  rtmsg_ifinfo+0x3c/0xa0
[    2.486450]  register_netdevice+0x889/0x9f0
[    2.486532]  register_netdev+0x1e/0x30
[    2.486597]  loopback_net_init+0x57/0xb0
[    2.486663]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.486737]  ops_init+0x68/0x140
[    2.486804]  setup_net+0x85/0x150
[    2.486871]  copy_net_ns+0xf5/0x200
[    2.486951]  create_new_namespaces+0x117/0x2f0
[    2.487022]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.487103]  ksys_unshare+0x346/0x5e0
[    2.487171]  __x64_sys_unshare+0x12/0x20
[    2.487236]  do_syscall_64+0x104/0xfc0
[    2.487300]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.487372] RIP: 0033:0x7f6eef566bcb
[    2.487441] 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
[    2.487570] RSP: 002b:00007ffccb881278 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.487651] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6eef566bcb
[    2.487730] RDX: 0000000000000000 RSI: 00007ffccb880fe0 RDI: 0000000040000000
[    2.487808] RBP: 00007ffccb881600 R08: 00007ffccb8811d0 R09: 0000000000000000
[    2.487890] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.487969] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000560cc4411b68
[    2.488057]  </TASK>
[    2.488109] ---[ end trace 0000000000000000 ]---
[    2.491632] ------------[ cut here ]------------
[    2.491702] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.491787] Modules linked in:
[    2.491854] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.491949] Tainted: [W]=WARN
[    2.492009] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.492092] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.492164] 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
[    2.492296] RSP: 0018:ff593db8403cfd68 EFLAGS: 00010286
[    2.492364] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.492456] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1e0b8cc1cf1200
[    2.492542] RBP: 0000000000000000 R08: ff1e0b8cc495c0d0 R09: ff1e0b8cc4bd1030
[    2.492623] R10: ff1e0b8cc4a20118 R11: fefefefefefefeff R12: 0000000000000000
[    2.492702] R13: 0000000000000010 R14: ff1e0b8cc4a20000 R15: ff1e0b8cc1cf1200
[    2.492785] FS:  0000000005ba3400(0000) GS:ff1e0b8d49196000(0000) knlGS:0000000000000000
[    2.492868] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.492943] CR2: 00007f5486a5b000 CR3: 000000000323a003 CR4: 0000000000771ef0
[    2.493028] PKRU: 55555554
[    2.493087] Call Trace:
[    2.493140]  <TASK>
[    2.493194]  rtmsg_ifinfo+0x3c/0xa0
[    2.493260]  register_netdevice+0x889/0x9f0
[    2.493327]  __tun_chr_ioctl+0x83c/0x16c0
[    2.493401]  ? do_sys_openat2+0x9a/0xe0
[    2.493468]  __x64_sys_ioctl+0xa1/0xe0
[    2.493534]  do_syscall_64+0x104/0xfc0
[    2.493600]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.493670] RIP: 0033:0x47cc8d
[    2.493735] 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
[    2.493862] RSP: 002b:00007ffe23b02130 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.493943] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.494026] RDX: 00007ffe23b021b0 RSI: 00000000400454ca RDI: 0000000000000005
[    2.494143] RBP: 00007ffe23b02180 R08: 0000000000000000 R09: 0000000000000000
[    2.494225] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe23b02688
[    2.494304] R13: 00007ffe23b02708 R14: 0000000000000002 R15: 0000000000543540
[    2.494384]  </TASK>
[    2.494447] ---[ end trace 0000000000000000 ]---
[    2.494535] ------------[ cut here ]------------
[    2.494604] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.494690] Modules linked in:
[    2.494750] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.494840] Tainted: [W]=WARN
[    2.494902] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.494977] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.495055] 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
[    2.495181] RSP: 0018:ff593db8403cfd60 EFLAGS: 00010286
[    2.495251] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.495332] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1e0b8cc1cf1200
[    2.495421] RBP: 0000000000000002 R08: ff1e0b8cc495c0d0 R09: ff1e0b8cc4bd1030
[    2.495503] R10: ff1e0b8cc4a20118 R11: fefefefefefefeff R12: 0000000000000000
[    2.495584] R13: 0000000000000010 R14: ff1e0b8cc4a20000 R15: ff1e0b8cc1cf1200
[    2.495670] FS:  0000000005ba3400(0000) GS:ff1e0b8d49196000(0000) knlGS:0000000000000000
[    2.495753] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.495824] CR2: 00007f5486a5b000 CR3: 000000000323a003 CR4: 0000000000771ef0
[    2.495902] PKRU: 55555554
[    2.495955] Call Trace:
[    2.496008]  <TASK>
[    2.496070]  rtnetlink_event+0x6e/0xb0
[    2.496135]  notifier_call_chain+0x6d/0x100
[    2.496201]  netdev_update_features+0x56/0x60
[    2.496272]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.496337]  ? file_init_path+0x62/0x120
[    2.496412]  __x64_sys_ioctl+0xa1/0xe0
[    2.496478]  do_syscall_64+0x104/0xfc0
[    2.496544]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.496614] RIP: 0033:0x47cc8d
[    2.496677] 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
[    2.496804] RSP: 002b:00007ffe23b02170 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.496884] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.496963] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.497044] RBP: 00007ffe23b021c0 R08: 0000000000000000 R09: 0000000000000000
[    2.497134] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe23b02688
[    2.497215] R13: 00007ffe23b02708 R14: 0000000000000002 R15: 0000000000543540
[    2.497296]  </TASK>
[    2.497349] ---[ end trace 0000000000000000 ]---
[    2.497448] ------------[ cut here ]------------
[    2.497518] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[    2.497606] Modules linked in:
[    2.497669] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.497764] Tainted: [W]=WARN
[    2.497826] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.497900] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.497984] 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
[    2.498132] RSP: 0018:ff593db8403cfc10 EFLAGS: 00010286
[    2.498198] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.498279] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1e0b8cc1cf1200
[    2.498362] RBP: 0000000000000000 R08: ff1e0b8cc495c0d0 R09: ff1e0b8cc4bd6030
[    2.498447] R10: ff1e0b8cc4a20118 R11: fefefefefefefeff R12: 0000000000000000
[    2.498526] R13: 0000000000000010 R14: ff1e0b8cc4a20000 R15: ff1e0b8cc1cf1200
[    2.498613] FS:  0000000005ba3400(0000) GS:ff1e0b8d49196000(0000) knlGS:0000000000000000
[    2.498693] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.498767] CR2: 00007f5486a5b000 CR3: 000000000323a003 CR4: 0000000000771ef0
[    2.498849] PKRU: 55555554
[    2.498899] Call Trace:
[    2.498950]  <TASK>
[    2.499002]  rtmsg_ifinfo+0x3c/0xa0
[    2.499068]  __dev_notify_flags+0xb1/0xf0
[    2.499129]  netif_change_flags+0x54/0x70
[    2.499190]  dev_change_flags+0x45/0x80
[    2.499250]  devinet_ioctl+0x607/0x7f0
[    2.499312]  inet_ioctl+0x229/0x240
[    2.499372]  ? __rtnl_unlock+0x35/0x60
[    2.499440]  sock_do_ioctl+0x75/0x140
[    2.499501]  __x64_sys_ioctl+0xa1/0xe0
[    2.499561]  do_syscall_64+0x104/0xfc0
[    2.499620]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.499686] RIP: 0033:0x47cc8d
[    2.499747] 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
[    2.499882] RSP: 002b:00007ffe23b02150 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.499963] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.500053] RDX: 00007ffe23b021c0 RSI: 0000000000008914 RDI: 0000000000000006
[    2.500137] RBP: 00007ffe23b021a0 R08: 0000000000000000 R09: 0000000000000000
[    2.500221] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe23b02688
[    2.500301] R13: 00007ffe23b02708 R14: 0000000000000002 R15: 0000000000543540
[    2.500384]  </TASK>
[    2.500441] ---[ end trace 0000000000000000 ]---
[   47.464718] ------------[ cut here ]------------
[   47.464877] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/160
[   47.464977] Modules linked in:
[   47.465041] CPU: 2 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.465140] Tainted: [W]=WARN
[   47.465201] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.465279] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.465351] 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
[   47.465530] RSP: 0018:ff593db8403cfb58 EFLAGS: 00010286
[   47.465602] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.465686] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1e0b8cc188f400
[   47.465769] RBP: 0000000000000000 R08: ff1e0b8cc495c0d0 R09: ff1e0b8cc4bd6030
[   47.465854] R10: ff1e0b8cc4a20118 R11: fefefefefefefeff R12: 0000000000000000
[   47.465937] R13: 0000000000000010 R14: ff1e0b8cc4a20000 R15: ff1e0b8cc188f400
[   47.466025] FS:  0000000000000000(0000) GS:ff1e0b8d49196000(0000) knlGS:0000000000000000
[   47.466117] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.466190] CR2: 00007f5486a5b000 CR3: 000000002ca42006 CR4: 0000000000771ef0
[   47.466273] PKRU: 55555554
[   47.466324] Call Trace:
[   47.466377]  <TASK>
[   47.466596]  rtmsg_ifinfo+0x3c/0xa0
[   47.466663]  netif_close_many+0xed/0x190
[   47.466725]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.466792]  ? __queue_work+0x141/0x550
[   47.466856]  unregister_netdevice_queue+0x9e/0xd0
[   47.466923]  __tun_detach+0x591/0x5b0
[   47.466987]  tun_chr_close+0x3f/0xc0
[   47.467048]  __fput+0xe8/0x2c0
[   47.467111]  task_work_run+0x63/0xa0
[   47.467173]  do_exit+0x2c1/0xba0
[   47.467235]  do_group_exit+0x2d/0xc0
[   47.467295]  get_signal+0x82e/0x900
[   47.467357]  arch_do_signal_or_restart+0x77/0x2b0
[   47.467441]  exit_to_user_mode_loop+0x75/0x4a0
[   47.467513]  do_syscall_64+0x439/0xfc0
[   47.467575]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.467643] RIP: 0033:0x4c2d9e
[   47.467703] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.467776] RSP: 002b:00007ffe23b01ae0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.467857] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.467937] RDX: 0000000000000014 RSI: 00007ffe23b01bc0 RDI: 0000000000000007
[   47.468019] RBP: 00007ffe23b01af0 R08: 00007ffe23b01b80 R09: 000000000000000c
[   47.468100] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000005bacb60
[   47.468181] R13: 00007ffe23b02708 R14: 00007ffe23b01cb0 R15: 0000000000543540
[   47.468265]  </TASK>
[   47.468316] ---[ end trace 0000000000000000 ]---
[   47.468489] ------------[ cut here ]------------
[   47.468526] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/160
[   47.468585] Modules linked in:
[   47.468614] CPU: 3 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.468677] Tainted: [W]=WARN
[   47.468701] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.468737] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.468808] 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
[   47.469028] RSP: 0018:ff593db8403cfbc8 EFLAGS: 00010286
[   47.469055] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.469096] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1e0b8cc1cf0300
[   47.469191] RBP: 0000000000000000 R08: ff1e0b8cc495c0d0 R09: ff1e0b8cc2005030
[   47.469238] R10: ff1e0b8cc4a20118 R11: fefefefefefefeff R12: 0000000000000000
[   47.469336] R13: 0000000000000011 R14: ff1e0b8cc4a20000 R15: ff1e0b8cc1cf0300
[   47.469421] FS:  0000000000000000(0000) GS:ff1e0b8d49216000(0000) knlGS:0000000000000000
[   47.469517] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.469588] CR2: 00007fa86f790f98 CR3: 000000002ca42003 CR4: 0000000000771ef0
[   47.469679] PKRU: 55555554
[   47.469704] Call Trace:
[   47.469726]  <TASK>
[   47.469740]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.469767]  unregister_netdevice_queue+0x9e/0xd0
[   47.469792]  __tun_detach+0x591/0x5b0
[   47.469818]  tun_chr_close+0x3f/0xc0
[   47.469860]  __fput+0xe8/0x2c0
[   47.469907]  task_work_run+0x63/0xa0
[   47.469948]  do_exit+0x2c1/0xba0
[   47.470011]  do_group_exit+0x2d/0xc0
[   47.470054]  get_signal+0x82e/0x900
[   47.470101]  arch_do_signal_or_restart+0x77/0x2b0
[   47.470132]  exit_to_user_mode_loop+0x75/0x4a0
[   47.470160]  do_syscall_64+0x439/0xfc0
[   47.470180]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.470204] RIP: 0033:0x4c2d9e
[   47.470252] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.470333] RSP: 002b:00007ffe23b01ae0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.470384] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.470442] RDX: 0000000000000014 RSI: 00007ffe23b01bc0 RDI: 0000000000000007
[   47.470529] RBP: 00007ffe23b01af0 R08: 00007ffe23b01b80 R09: 000000000000000c
[   47.470595] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000005bacb60
[   47.470684] R13: 00007ffe23b02708 R14: 00007ffe23b01cb0 R15: 0000000000543540
[   47.470774]  </TASK>
[   47.470799] ---[ end trace 0000000000000000 ]---
[   47.478476] ------------[ cut here ]------------
[   47.478516] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:0/12
[   47.478593] Modules linked in:
[   47.478623] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.478684] Tainted: [W]=WARN
[   47.478706] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.478742] Workqueue: netns cleanup_net
[   47.478763] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.478790] 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
[   47.478891] RSP: 0018:ff593db840067c78 EFLAGS: 00010286
[   47.478921] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.478969] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1e0b8cc320a400
[   47.479011] RBP: 0000000000000000 R08: ff1e0b8cc2ef9910 R09: ff1e0b8cc2eae02c
[   47.479054] R10: ff1e0b8cc31d7118 R11: fefefefefefefeff R12: 0000000000000000
[   47.479095] R13: 0000000000000011 R14: ff1e0b8cc31d7000 R15: ff1e0b8cc320a400
[   47.479144] FS:  0000000000000000(0000) GS:ff1e0b8d49096000(0000) knlGS:0000000000000000
[   47.479188] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.479221] CR2: 00007fa86f790f98 CR3: 000000002ca42004 CR4: 0000000000771ef0
[   47.479265] PKRU: 55555554
[   47.479278] Call Trace:
[   47.479293]  <TASK>
[   47.479306]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.479331]  default_device_exit_batch+0x318/0x390
[   47.479360]  ops_undo_list+0x10b/0x240
[   47.479383]  cleanup_net+0x1d7/0x2e0
[   47.479412]  process_one_work+0x162/0x360
[   47.479443]  worker_thread+0x16e/0x2d0
[   47.479467]  ? rescuer_thread+0x510/0x510
[   47.479491]  kthread+0xe1/0x120
[   47.479515]  ? kthread_park+0xa0/0xa0
[   47.479539]  ret_from_fork+0x16d/0x250
[   47.479562]  ? kthread_park+0xa0/0xa0
[   47.479584]  ret_from_fork_asm+0x11/0x20
[   47.479609]  </TASK>
[   47.479624] ---[ end trace 0000000000000000 ]---