[  138.672537] ------------[ cut here ]------------
[  138.672589] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/295
[  138.672660] Modules linked in:
[  138.672684] CPU: 0 UID: 0 PID: 295 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.672750] Tainted: [W]=WARN
[  138.672781] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.672821] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.672854] 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
[  138.672956] RSP: 0018:ff6c7b1cc056fcc8 EFLAGS: 00010286
[  138.672985] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.673028] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c3a200
[  138.673075] RBP: 0000000000000000 R08: ff2e1d1dc31362d0 R09: ff2e1d1dc1ca902c
[  138.673120] R10: ff2e1d1dc320e118 R11: fefefefefefefeff R12: 0000000000000000
[  138.673170] R13: 0000000000000010 R14: ff2e1d1dc320e000 R15: ff2e1d1dc1c3a200
[  138.673215] FS:  00007f69b315f740(0000) GS:ff2e1d1e70a96000(0000) knlGS:0000000000000000
[  138.673261] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.673302] CR2: 00007f69b3321280 CR3: 00000000066ac003 CR4: 0000000000771ef0
[  138.673352] PKRU: 55555554
[  138.673367] Call Trace:
[  138.673383]  <TASK>
[  138.673399]  rtmsg_ifinfo+0x3c/0xa0
[  138.673423]  register_netdevice+0x889/0x9f0
[  138.673448]  register_netdev+0x1e/0x30
[  138.673472]  loopback_net_init+0x57/0xb0
[  138.673497]  ? vsock_sysctl_init_net+0xb6/0x140
[  138.673531]  ops_init+0x68/0x140
[  138.673551]  setup_net+0x85/0x150
[  138.673573]  copy_net_ns+0xf5/0x200
[  138.673597]  create_new_namespaces+0x117/0x2f0
[  138.673625]  unshare_nsproxy_namespaces+0x85/0xb0
[  138.673660]  ksys_unshare+0x346/0x5e0
[  138.673685]  __x64_sys_unshare+0x12/0x20
[  138.673709]  do_syscall_64+0x104/0xfc0
[  138.673734]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.673772] RIP: 0033:0x7f69b325abcb
[  138.673795] 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
[  138.673902] RSP: 002b:00007ffed53fce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  138.673947] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f69b325abcb
[  138.673989] RDX: 0000000000000000 RSI: 00007ffed53fcb80 RDI: 0000000040000000
[  138.674036] RBP: 00007ffed53fd1a0 R08: 00007ffed53fcd70 R09: 0000000000000000
[  138.674079] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  138.674128] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000562ae0ce4b68
[  138.674173]  </TASK>
[  138.674188] ---[ end trace 0000000000000000 ]---
[  138.674878] ------------[ cut here ]------------
[  138.674908] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/295
[  138.674962] Modules linked in:
[  138.674985] CPU: 0 UID: 0 PID: 295 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.675046] Tainted: [W]=WARN
[  138.675068] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.675104] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.675130] 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
[  138.675224] RSP: 0018:ff6c7b1cc056fd68 EFLAGS: 00010286
[  138.675252] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.675297] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c3a200
[  138.675341] RBP: 0000000000000000 R08: ff2e1d1dc30fe610 R09: ff2e1d1dc2956030
[  138.675385] R10: ff2e1d1dc4900118 R11: fefefefefefefeff R12: 0000000000000000
[  138.675429] R13: 0000000000000010 R14: ff2e1d1dc4900000 R15: ff2e1d1dc1c3a200
[  138.675472] FS:  00000000117fb400(0000) GS:ff2e1d1e70a96000(0000) knlGS:0000000000000000
[  138.675520] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.675560] CR2: 00007fc473884000 CR3: 000000000310f004 CR4: 0000000000771ef0
[  138.675603] PKRU: 55555554
[  138.675619] Call Trace:
[  138.675641]  <TASK>
[  138.675655]  rtmsg_ifinfo+0x3c/0xa0
[  138.675678]  register_netdevice+0x889/0x9f0
[  138.675701]  __tun_chr_ioctl+0x83c/0x16c0
[  138.675729]  ? do_sys_openat2+0x9a/0xe0
[  138.675756]  __x64_sys_ioctl+0xa1/0xe0
[  138.675785]  do_syscall_64+0x104/0xfc0
[  138.675806]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.675839] RIP: 0033:0x47cc8d
[  138.675862] 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
[  138.675975] RSP: 002b:00007ffd9394ea60 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.676020] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.676067] RDX: 00007ffd9394eae0 RSI: 00000000400454ca RDI: 0000000000000005
[  138.676112] RBP: 00007ffd9394eab0 R08: 0000000000000000 R09: 0000000000000000
[  138.676155] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd9394efb8
[  138.676196] R13: 00007ffd9394f038 R14: 0000000000000002 R15: 0000000000543540
[  138.676239]  </TASK>
[  138.676256] ---[ end trace 0000000000000000 ]---
[  138.676300] ------------[ cut here ]------------
[  138.676330] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/295
[  138.676381] Modules linked in:
[  138.676405] CPU: 0 UID: 0 PID: 295 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.676462] Tainted: [W]=WARN
[  138.676488] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.676527] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.676559] 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
[  138.676667] RSP: 0018:ff6c7b1cc056fd60 EFLAGS: 00010286
[  138.676697] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  138.676739] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c3a200
[  138.676788] RBP: 0000000000000002 R08: ff2e1d1dc30fe610 R09: ff2e1d1dc2956030
[  138.676833] R10: ff2e1d1dc4900118 R11: fefefefefefefeff R12: 0000000000000000
[  138.676877] R13: 0000000000000010 R14: ff2e1d1dc4900000 R15: ff2e1d1dc1c3a200
[  138.676921] FS:  00000000117fb400(0000) GS:ff2e1d1e70a96000(0000) knlGS:0000000000000000
[  138.676979] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.677019] CR2: 00007fc473884000 CR3: 000000000310f004 CR4: 0000000000771ef0
[  138.677063] PKRU: 55555554
[  138.677079] Call Trace:
[  138.677093]  <TASK>
[  138.677107]  rtnetlink_event+0x6e/0xb0
[  138.677130]  notifier_call_chain+0x6d/0x100
[  138.677154]  netdev_update_features+0x56/0x60
[  138.677183]  __tun_chr_ioctl+0xbf1/0x16c0
[  138.677202]  ? file_init_path+0x62/0x120
[  138.677225]  __x64_sys_ioctl+0xa1/0xe0
[  138.677252]  do_syscall_64+0x104/0xfc0
[  138.677275]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.677300] RIP: 0033:0x47cc8d
[  138.677321] 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
[  138.677435] RSP: 002b:00007ffd9394eaa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.677478] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.677522] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  138.677566] RBP: 00007ffd9394eaf0 R08: 0000000000000000 R09: 0000000000000000
[  138.677608] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd9394efb8
[  138.677654] R13: 00007ffd9394f038 R14: 0000000000000002 R15: 0000000000543540
[  138.677705]  </TASK>
[  138.677720] ---[ end trace 0000000000000000 ]---
[  138.677770] ------------[ cut here ]------------
[  138.677801] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/295
[  138.677852] Modules linked in:
[  138.677876] CPU: 0 UID: 0 PID: 295 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.677933] Tainted: [W]=WARN
[  138.677953] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.677990] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.678021] 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
[  138.678120] RSP: 0018:ff6c7b1cc056fc10 EFLAGS: 00010286
[  138.678150] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  138.678193] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c3a200
[  138.678240] RBP: 0000000000000000 R08: ff2e1d1dc30fe610 R09: ff2e1d1dc2950030
[  138.678284] R10: ff2e1d1dc4900118 R11: fefefefefefefeff R12: 0000000000000000
[  138.678327] R13: 0000000000000010 R14: ff2e1d1dc4900000 R15: ff2e1d1dc1c3a200
[  138.678375] FS:  00000000117fb400(0000) GS:ff2e1d1e70a96000(0000) knlGS:0000000000000000
[  138.678419] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.678448] CR2: 00007fc473884000 CR3: 000000000310f004 CR4: 0000000000771ef0
[  138.678497] PKRU: 55555554
[  138.678513] Call Trace:
[  138.678528]  <TASK>
[  138.678542]  rtmsg_ifinfo+0x3c/0xa0
[  138.678563]  __dev_notify_flags+0xb1/0xf0
[  138.678587]  netif_change_flags+0x54/0x70
[  138.678609]  dev_change_flags+0x45/0x80
[  138.678631]  devinet_ioctl+0x607/0x7f0
[  138.678659]  inet_ioctl+0x229/0x240
[  138.678684]  ? __rtnl_unlock+0x35/0x60
[  138.678706]  sock_do_ioctl+0x75/0x140
[  138.678733]  __x64_sys_ioctl+0xa1/0xe0
[  138.678758]  do_syscall_64+0x104/0xfc0
[  138.678790]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.678819] RIP: 0033:0x47cc8d
[  138.678841] 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
[  138.678942] RSP: 002b:00007ffd9394ea80 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.678983] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.679029] RDX: 00007ffd9394eaf0 RSI: 0000000000008914 RDI: 0000000000000006
[  138.679073] RBP: 00007ffd9394ead0 R08: 0000000000000000 R09: 0000000000000000
[  138.679115] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd9394efb8
[  138.679157] R13: 00007ffd9394f038 R14: 0000000000000002 R15: 0000000000543540
[  138.679203]  </TASK>
[  138.679217] ---[ end trace 0000000000000000 ]---
[  183.658257] ------------[ cut here ]------------
[  183.658338] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/295
[  183.658412] Modules linked in:
[  183.658440] CPU: 0 UID: 0 PID: 295 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.658509] Tainted: [W]=WARN
[  183.658539] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.658587] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.658620] 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
[  183.658747] RSP: 0018:ff6c7b1cc056fb58 EFLAGS: 00010286
[  183.658778] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  183.658830] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c3a900
[  183.658875] RBP: 0000000000000000 R08: ff2e1d1dc30fe610 R09: ff2e1d1dc2950030
[  183.658919] R10: ff2e1d1dc4900118 R11: fefefefefefefeff R12: 0000000000000000
[  183.658965] R13: 0000000000000010 R14: ff2e1d1dc4900000 R15: ff2e1d1dc1c3a900
[  183.659010] FS:  0000000000000000(0000) GS:ff2e1d1e70a96000(0000) knlGS:0000000000000000
[  183.659057] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.659088] CR2: 00007f23956ef6f0 CR3: 00000000048e1006 CR4: 0000000000771ef0
[  183.659143] PKRU: 55555554
[  183.659158] Call Trace:
[  183.659174]  <TASK>
[  183.659190]  rtmsg_ifinfo+0x3c/0xa0
[  183.659214]  netif_close_many+0xed/0x190
[  183.659240]  unregister_netdevice_many_notify+0x267/0x9d0
[  183.659272]  ? __queue_work+0x141/0x550
[  183.659298]  unregister_netdevice_queue+0x9e/0xd0
[  183.659328]  __tun_detach+0x591/0x5b0
[  183.659357]  tun_chr_close+0x3f/0xc0
[  183.659377]  __fput+0xe8/0x2c0
[  183.659403]  task_work_run+0x63/0xa0
[  183.659429]  do_exit+0x2c1/0xba0
[  183.659464]  do_group_exit+0x2d/0xc0
[  183.659487]  get_signal+0x82e/0x900
[  183.659512]  arch_do_signal_or_restart+0x77/0x2b0
[  183.659546]  exit_to_user_mode_loop+0x75/0x4a0
[  183.659579]  do_syscall_64+0x439/0xfc0
[  183.659607]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.659633] RIP: 0033:0x4c2d9e
[  183.659664] Code: Unable to access opcode bytes at 0x4c2d74.
[  183.659701] RSP: 002b:00007ffd9394e410 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  183.659747] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[  183.659793] RDX: 0000000000000014 RSI: 00007ffd9394e4f0 RDI: 0000000000000007
[  183.659835] RBP: 00007ffd9394e420 R08: 00007ffd9394e4b0 R09: 000000000000000c
[  183.659882] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000011804cf0
[  183.659929] R13: 00007ffd9394f038 R14: 00007ffd9394e5e0 R15: 0000000000543540
[  183.659980]  </TASK>
[  183.659997] ---[ end trace 0000000000000000 ]---
[  183.660098] ------------[ cut here ]------------
[  183.660127] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/295
[  183.660195] Modules linked in:
[  183.660217] CPU: 0 UID: 0 PID: 295 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.660277] Tainted: [W]=WARN
[  183.660301] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.660336] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.660366] 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
[  183.660478] RSP: 0018:ff6c7b1cc056fbc8 EFLAGS: 00010286
[  183.660512] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.660553] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc1c3a900
[  183.660597] RBP: 0000000000000000 R08: ff2e1d1dc30fe610 R09: ff2e1d1dc7b31830
[  183.660653] R10: ff2e1d1dc4900118 R11: fefefefefefefeff R12: 0000000000000000
[  183.660704] R13: 0000000000000011 R14: ff2e1d1dc4900000 R15: ff2e1d1dc1c3a900
[  183.660748] FS:  0000000000000000(0000) GS:ff2e1d1e70a96000(0000) knlGS:0000000000000000
[  183.660792] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.660833] CR2: 00007f239575a550 CR3: 000000002e442005 CR4: 0000000000771ef0
[  183.660883] PKRU: 55555554
[  183.660897] Call Trace:
[  183.660913]  <TASK>
[  183.660928]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.660959]  unregister_netdevice_queue+0x9e/0xd0
[  183.660989]  __tun_detach+0x591/0x5b0
[  183.661015]  tun_chr_close+0x3f/0xc0
[  183.661039]  __fput+0xe8/0x2c0
[  183.661064]  task_work_run+0x63/0xa0
[  183.661088]  do_exit+0x2c1/0xba0
[  183.661113]  do_group_exit+0x2d/0xc0
[  183.661140]  get_signal+0x82e/0x900
[  183.661164]  arch_do_signal_or_restart+0x77/0x2b0
[  183.661193]  exit_to_user_mode_loop+0x75/0x4a0
[  183.661224]  do_syscall_64+0x439/0xfc0
[  183.661248]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.661279] RIP: 0033:0x4c2d9e
[  183.661302] Code: Unable to access opcode bytes at 0x4c2d74.
[  183.661339] RSP: 002b:00007ffd9394e410 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  183.661387] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[  183.661436] RDX: 0000000000000014 RSI: 00007ffd9394e4f0 RDI: 0000000000000007
[  183.661481] RBP: 00007ffd9394e420 R08: 00007ffd9394e4b0 R09: 000000000000000c
[  183.661525] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000011804cf0
[  183.661573] R13: 00007ffd9394f038 R14: 00007ffd9394e5e0 R15: 0000000000543540
[  183.661616]  </TASK>
[  183.661633] ---[ end trace 0000000000000000 ]---
[  183.673743] ------------[ cut here ]------------
[  183.673792] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:1/65
[  183.673860] Modules linked in:
[  183.673886] CPU: 1 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.673951] Tainted: [W]=WARN
[  183.673972] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.674008] Workqueue: netns cleanup_net
[  183.674034] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.674065] 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
[  183.674171] RSP: 0018:ff6c7b1cc023fc78 EFLAGS: 00010286
[  183.674201] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.674245] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2e1d1dc3174a00
[  183.674296] RBP: 0000000000000000 R08: ff2e1d1dc31362d0 R09: ff2e1d1dc1c7a02c
[  183.674338] R10: ff2e1d1dc320e118 R11: fefefefefefefeff R12: 0000000000000000
[  183.674382] R13: 0000000000000011 R14: ff2e1d1dc320e000 R15: ff2e1d1dc3174a00
[  183.674430] FS:  0000000000000000(0000) GS:ff2e1d1e70b16000(0000) knlGS:0000000000000000
[  183.674474] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.674511] CR2: 00007f89b7edd680 CR3: 000000002e442001 CR4: 0000000000771ef0
[  183.674558] PKRU: 55555554
[  183.674573] Call Trace:
[  183.674586]  <TASK>
[  183.674601]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.674629]  default_device_exit_batch+0x318/0x390
[  183.674665]  ops_undo_list+0x10b/0x240
[  183.674690]  cleanup_net+0x1d7/0x2e0
[  183.674714]  process_one_work+0x162/0x360
[  183.674742]  worker_thread+0x16e/0x2d0
[  183.674766]  ? rescuer_thread+0x510/0x510
[  183.674789]  kthread+0xe1/0x120
[  183.674811]  ? kthread_park+0xa0/0xa0
[  183.674833]  ret_from_fork+0x16d/0x250
[  183.674858]  ? kthread_park+0xa0/0xa0
[  183.674885]  ret_from_fork_asm+0x11/0x20
[  183.674909]  </TASK>
[  183.674927] ---[ end trace 0000000000000000 ]---