[  138.676972] ------------[ cut here ]------------
[  138.677033] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/293
[  138.677094] Modules linked in:
[  138.677121] CPU: 0 UID: 0 PID: 293 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.677180] Tainted: [W]=WARN
[  138.677204] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.677241] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.677269] 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
[  138.677370] RSP: 0018:ff71f0c380567cc8 EFLAGS: 00010286
[  138.677403] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.677449] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108314c500
[  138.677493] RBP: 0000000000000000 R08: ff23231083268250 R09: ff2323108206302c
[  138.677537] R10: ff23231082dfc118 R11: fefefefefefefeff R12: 0000000000000000
[  138.677582] R13: 0000000000000010 R14: ff23231082dfc000 R15: ff2323108314c500
[  138.677635] FS:  00007f746a977740(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  138.677679] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.677717] CR2: 0000557204f6e008 CR3: 0000000001924005 CR4: 0000000000771ef0
[  138.677757] PKRU: 55555554
[  138.677771] Call Trace:
[  138.677791]  <TASK>
[  138.677805]  rtmsg_ifinfo+0x3c/0xa0
[  138.677826]  register_netdevice+0x889/0x9f0
[  138.677853]  register_netdev+0x1e/0x30
[  138.677875]  loopback_net_init+0x57/0xb0
[  138.677897]  ? vsock_sysctl_init_net+0xb6/0x140
[  138.677926]  ops_init+0x68/0x140
[  138.677950]  setup_net+0x85/0x150
[  138.677973]  copy_net_ns+0xf5/0x200
[  138.678000]  create_new_namespaces+0x117/0x2f0
[  138.678031]  unshare_nsproxy_namespaces+0x85/0xb0
[  138.678061]  ksys_unshare+0x346/0x5e0
[  138.678085]  __x64_sys_unshare+0x12/0x20
[  138.678109]  do_syscall_64+0x104/0xfc0
[  138.678131]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.678161] RIP: 0033:0x7f746aa72bcb
[  138.678183] 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
[  138.678278] RSP: 002b:00007ffe576aa468 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  138.678321] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f746aa72bcb
[  138.678366] RDX: 0000000000000000 RSI: 00007ffe576aa1d0 RDI: 0000000040000000
[  138.678407] RBP: 00007ffe576aa7f0 R08: 00007ffe576aa3c0 R09: 0000000000000000
[  138.678454] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  138.678497] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000557200ce5b68
[  138.678536]  </TASK>
[  138.678550] ---[ end trace 0000000000000000 ]---
[  138.679164] ------------[ cut here ]------------
[  138.679209] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/293
[  138.679267] Modules linked in:
[  138.679289] CPU: 0 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.679347] Tainted: [W]=WARN
[  138.679366] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.679400] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.679432] 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
[  138.679536] RSP: 0018:ff71f0c380567d68 EFLAGS: 00010286
[  138.679566] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.679608] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108314c500
[  138.679648] RBP: 0000000000000000 R08: ff23231083294d90 R09: ff2323108448a030
[  138.679689] R10: ff2323108451c118 R11: fefefefefefefeff R12: 0000000000000000
[  138.679731] R13: 0000000000000010 R14: ff2323108451c000 R15: ff2323108314c500
[  138.679776] FS:  0000000025078400(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  138.679821] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.679862] CR2: 00007fb334d98000 CR3: 0000000001933006 CR4: 0000000000771ef0
[  138.679909] PKRU: 55555554
[  138.679927] Call Trace:
[  138.679941]  <TASK>
[  138.679957]  rtmsg_ifinfo+0x3c/0xa0
[  138.679978]  register_netdevice+0x889/0x9f0
[  138.680001]  __tun_chr_ioctl+0x83c/0x16c0
[  138.680030]  ? do_sys_openat2+0x9a/0xe0
[  138.680055]  __x64_sys_ioctl+0xa1/0xe0
[  138.680079]  do_syscall_64+0x104/0xfc0
[  138.680103]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.680133] RIP: 0033:0x47cc8d
[  138.680155] 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
[  138.680245] RSP: 002b:00007ffc8ee9d900 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.680291] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.680336] RDX: 00007ffc8ee9d980 RSI: 00000000400454ca RDI: 0000000000000005
[  138.680380] RBP: 00007ffc8ee9d950 R08: 0000000000000000 R09: 0000000000000000
[  138.680422] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc8ee9de58
[  138.680472] R13: 00007ffc8ee9ded8 R14: 0000000000000002 R15: 0000000000543540
[  138.680514]  </TASK>
[  138.680528] ---[ end trace 0000000000000000 ]---
[  138.680571] ------------[ cut here ]------------
[  138.680613] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/293
[  138.680665] Modules linked in:
[  138.680686] CPU: 0 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.680739] Tainted: [W]=WARN
[  138.680761] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.680797] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.680829] 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
[  138.680923] RSP: 0018:ff71f0c380567d60 EFLAGS: 00010286
[  138.680957] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  138.681007] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108314c500
[  138.681049] RBP: 0000000000000002 R08: ff23231083294d90 R09: ff2323108448a030
[  138.681095] R10: ff2323108451c118 R11: fefefefefefefeff R12: 0000000000000000
[  138.681136] R13: 0000000000000010 R14: ff2323108451c000 R15: ff2323108314c500
[  138.681180] FS:  0000000025078400(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  138.681220] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.681256] CR2: 00007fb334d98000 CR3: 0000000001933006 CR4: 0000000000771ef0
[  138.681298] PKRU: 55555554
[  138.681312] Call Trace:
[  138.681327]  <TASK>
[  138.681341]  rtnetlink_event+0x6e/0xb0
[  138.681364]  notifier_call_chain+0x6d/0x100
[  138.681387]  netdev_update_features+0x56/0x60
[  138.681415]  __tun_chr_ioctl+0xbf1/0x16c0
[  138.681443]  ? file_init_path+0x62/0x120
[  138.681467]  __x64_sys_ioctl+0xa1/0xe0
[  138.681490]  do_syscall_64+0x104/0xfc0
[  138.681509]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.681540] RIP: 0033:0x47cc8d
[  138.681563] 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
[  138.681664] RSP: 002b:00007ffc8ee9d940 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.681709] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.681750] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  138.681796] RBP: 00007ffc8ee9d990 R08: 0000000000000004 R09: 00007ffc8ee9d910
[  138.681841] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc8ee9de58
[  138.681885] R13: 00007ffc8ee9ded8 R14: 0000000000000002 R15: 0000000000543540
[  138.681929]  </TASK>
[  138.681944] ---[ end trace 0000000000000000 ]---
[  138.681988] ------------[ cut here ]------------
[  138.682024] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/293
[  138.682074] Modules linked in:
[  138.682096] CPU: 0 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.682153] Tainted: [W]=WARN
[  138.682174] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.682214] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.682241] 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
[  138.682340] RSP: 0018:ff71f0c380567c10 EFLAGS: 00010286
[  138.682370] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  138.682415] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108314c500
[  138.682468] RBP: 0000000000000000 R08: ff23231083294d90 R09: ff23231082df8030
[  138.682515] R10: ff2323108451c118 R11: fefefefefefefeff R12: 0000000000000000
[  138.682558] R13: 0000000000000010 R14: ff2323108451c000 R15: ff2323108314c500
[  138.682607] FS:  0000000025078400(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  138.682649] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.682686] CR2: 00007fb334d98000 CR3: 0000000001933006 CR4: 0000000000771ef0
[  138.682732] PKRU: 55555554
[  138.682747] Call Trace:
[  138.682762]  <TASK>
[  138.682775]  rtmsg_ifinfo+0x3c/0xa0
[  138.682794]  __dev_notify_flags+0xb1/0xf0
[  138.682816]  netif_change_flags+0x54/0x70
[  138.682839]  dev_change_flags+0x45/0x80
[  138.682863]  devinet_ioctl+0x607/0x7f0
[  138.682887]  inet_ioctl+0x229/0x240
[  138.682910]  ? __rtnl_unlock+0x35/0x60
[  138.682931]  sock_do_ioctl+0x75/0x140
[  138.682953]  __x64_sys_ioctl+0xa1/0xe0
[  138.682977]  do_syscall_64+0x104/0xfc0
[  138.683002]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.683028] RIP: 0033:0x47cc8d
[  138.683050] 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
[  138.683145] RSP: 002b:00007ffc8ee9d920 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.683192] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.683230] RDX: 00007ffc8ee9d990 RSI: 0000000000008914 RDI: 0000000000000006
[  138.683265] RBP: 00007ffc8ee9d970 R08: 0000000000000004 R09: 00007ffc8ee9d990
[  138.683306] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc8ee9de58
[  138.683357] R13: 00007ffc8ee9ded8 R14: 0000000000000002 R15: 0000000000543540
[  138.683398]  </TASK>
[  138.683414] ---[ end trace 0000000000000000 ]---
[  183.662925] ------------[ cut here ]------------
[  183.663005] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/293
[  183.663064] Modules linked in:
[  183.663091] CPU: 0 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.663159] Tainted: [W]=WARN
[  183.663179] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.663217] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.663247] 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
[  183.663349] RSP: 0018:ff71f0c380567b58 EFLAGS: 00010286
[  183.663381] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  183.663430] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023100
[  183.663469] RBP: 0000000000000000 R08: ff23231083294d90 R09: ff23231082df8030
[  183.663509] R10: ff2323108451c118 R11: fefefefefefefeff R12: 0000000000000000
[  183.663552] R13: 0000000000000010 R14: ff2323108451c000 R15: ff23231083023100
[  183.663603] FS:  0000000000000000(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  183.663649] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.663686] CR2: 00007fb334d98000 CR3: 0000000020c42001 CR4: 0000000000771ef0
[  183.663727] PKRU: 55555554
[  183.663747] Call Trace:
[  183.663765]  <TASK>
[  183.663780]  rtmsg_ifinfo+0x3c/0xa0
[  183.663801]  netif_close_many+0xed/0x190
[  183.663825]  unregister_netdevice_many_notify+0x267/0x9d0
[  183.663856]  ? __queue_work+0x141/0x550
[  183.663881]  unregister_netdevice_queue+0x9e/0xd0
[  183.663910]  __tun_detach+0x591/0x5b0
[  183.663936]  tun_chr_close+0x3f/0xc0
[  183.663957]  __fput+0xe8/0x2c0
[  183.663979]  task_work_run+0x63/0xa0
[  183.664006]  do_exit+0x2c1/0xba0
[  183.664031]  do_group_exit+0x2d/0xc0
[  183.664054]  get_signal+0x82e/0x900
[  183.664079]  ? __d_alloc+0x40/0x200
[  183.664101]  ? alloc_empty_file+0x3f/0xd0
[  183.664123]  arch_do_signal_or_restart+0x77/0x2b0
[  183.664160]  ? alloc_file_pseudo+0xc1/0x110
[  183.664183]  ? __sys_socket+0xda/0x130
[  183.664207]  exit_to_user_mode_loop+0x75/0x4a0
[  183.664234]  do_syscall_64+0x439/0xfc0
[  183.664261]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.664291] RIP: 0033:0x47ea2b
[  183.664314] Code: Unable to access opcode bytes at 0x47ea01.
[  183.664351] RSP: 002b:00007ffc8ee9d3a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  183.664392] RAX: 0000000000000007 RBX: 00007ffc8ee9d480 RCX: 000000000047ea2b
[  183.664432] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  183.664471] RBP: 00007ffc8ee9d3e0 R08: 0000000000000041 R09: 00000000250793e0
[  183.664514] R10: 0000000000000040 R11: 0000000000000202 R12: 00007ffc8ee9de58
[  183.664553] R13: 00007ffc8ee9ded8 R14: 00007ffc8ee9d958 R15: 0000000000543540
[  183.664599]  </TASK>
[  183.664618] ---[ end trace 0000000000000000 ]---
[  183.664810] ------------[ cut here ]------------
[  183.664835] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/293
[  183.664888] Modules linked in:
[  183.664910] CPU: 0 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.664968] Tainted: [W]=WARN
[  183.664991] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.665029] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.665061] 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
[  183.665156] RSP: 0018:ff71f0c380567bc8 EFLAGS: 00010286
[  183.665183] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.665229] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023100
[  183.665270] RBP: 0000000000000000 R08: ff23231083294d90 R09: ff2323108727b830
[  183.665311] R10: ff2323108451c118 R11: fefefefefefefeff R12: 0000000000000000
[  183.665352] R13: 0000000000000011 R14: ff2323108451c000 R15: ff23231083023100
[  183.665393] FS:  0000000000000000(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  183.665439] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.665473] CR2: 00007fb334d98000 CR3: 0000000020c42001 CR4: 0000000000771ef0
[  183.665515] PKRU: 55555554
[  183.665528] Call Trace:
[  183.665543]  <TASK>
[  183.665556]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.665589]  unregister_netdevice_queue+0x9e/0xd0
[  183.665616]  __tun_detach+0x591/0x5b0
[  183.665640]  tun_chr_close+0x3f/0xc0
[  183.665667]  __fput+0xe8/0x2c0
[  183.665689]  task_work_run+0x63/0xa0
[  183.665710]  do_exit+0x2c1/0xba0
[  183.665731]  do_group_exit+0x2d/0xc0
[  183.665751]  get_signal+0x82e/0x900
[  183.665774]  ? __d_alloc+0x40/0x200
[  183.665796]  ? alloc_empty_file+0x3f/0xd0
[  183.665816]  arch_do_signal_or_restart+0x77/0x2b0
[  183.665846]  ? alloc_file_pseudo+0xc1/0x110
[  183.665870]  ? __sys_socket+0xda/0x130
[  183.665890]  exit_to_user_mode_loop+0x75/0x4a0
[  183.665920]  do_syscall_64+0x439/0xfc0
[  183.665941]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.665971] RIP: 0033:0x47ea2b
[  183.665990] Code: Unable to access opcode bytes at 0x47ea01.
[  183.666170] RSP: 002b:00007ffc8ee9d3a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  183.666219] RAX: 0000000000000007 RBX: 00007ffc8ee9d480 RCX: 000000000047ea2b
[  183.666263] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  183.666303] RBP: 00007ffc8ee9d3e0 R08: 0000000000000041 R09: 00000000250793e0
[  183.666348] R10: 0000000000000040 R11: 0000000000000202 R12: 00007ffc8ee9de58
[  183.666391] R13: 00007ffc8ee9ded8 R14: 00007ffc8ee9d958 R15: 0000000000543540
[  183.666432]  </TASK>
[  183.666448] ---[ end trace 0000000000000000 ]---
[  183.675103] ------------[ cut here ]------------
[  183.675141] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:0/12
[  183.675210] Modules linked in:
[  183.675233] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.675292] Tainted: [W]=WARN
[  183.675317] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.675356] Workqueue: netns cleanup_net
[  183.675381] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.675411] 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
[  183.675508] RSP: 0018:ff71f0c380067c78 EFLAGS: 00010286
[  183.675541] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.675588] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff23231083023200
[  183.675631] RBP: 0000000000000000 R08: ff23231083268250 R09: ff2323108124f02c
[  183.675674] R10: ff23231082dfc118 R11: fefefefefefefeff R12: 0000000000000000
[  183.675714] R13: 0000000000000011 R14: ff23231082dfc000 R15: ff23231083023200
[  183.675764] FS:  0000000000000000(0000) GS:ff23231129816000(0000) knlGS:0000000000000000
[  183.675812] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.675846] CR2: 00007fd65a334f98 CR3: 0000000020c42003 CR4: 0000000000771ef0
[  183.675890] PKRU: 55555554
[  183.675903] Call Trace:
[  183.675918]  <TASK>
[  183.675938]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.675969]  default_device_exit_batch+0x318/0x390
[  183.676000]  ops_undo_list+0x10b/0x240
[  183.676022]  cleanup_net+0x1d7/0x2e0
[  183.676047]  process_one_work+0x162/0x360
[  183.676070]  worker_thread+0x16e/0x2d0
[  183.676094]  ? rescuer_thread+0x510/0x510
[  183.676114]  kthread+0xe1/0x120
[  183.676135]  ? kthread_park+0xa0/0xa0
[  183.676160]  ret_from_fork+0x16d/0x250
[  183.676181]  ? kthread_park+0xa0/0xa0
[  183.676204]  ret_from_fork_asm+0x11/0x20
[  183.676230]  </TASK>
[  183.676243] ---[ end trace 0000000000000000 ]---