[  138.654057] ------------[ cut here ]------------
[  138.654153] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/293
[  138.654238] Modules linked in:
[  138.654302] CPU: 2 UID: 0 PID: 293 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.654394] Tainted: [W]=WARN
[  138.654447] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.654516] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.654579] 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
[  138.654708] RSP: 0018:ff7988938052fcc8 EFLAGS: 00010286
[  138.654770] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.654844] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3f40af01d79100
[  138.654920] RBP: 0000000000000000 R08: ff3f40af018f3d10 R09: ff3f40af04abc02c
[  138.654995] R10: ff3f40af02061118 R11: fefefefefefefeff R12: 0000000000000000
[  138.655070] R13: 0000000000000010 R14: ff3f40af02061000 R15: ff3f40af01d79100
[  138.655156] FS:  00007f96a18b8740(0000) GS:ff3f40af93d96000(0000) knlGS:0000000000000000
[  138.655233] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.655306] CR2: 000055fcda0e9008 CR3: 0000000003073001 CR4: 0000000000771ef0
[  138.655383] PKRU: 55555554
[  138.655430] Call Trace:
[  138.655478]  <TASK>
[  138.655526]  rtmsg_ifinfo+0x3c/0xa0
[  138.655582]  register_netdevice+0x889/0x9f0
[  138.655638]  register_netdev+0x1e/0x30
[  138.655693]  loopback_net_init+0x57/0xb0
[  138.655751]  ? vsock_sysctl_init_net+0xb6/0x140
[  138.655815]  ops_init+0x68/0x140
[  138.655873]  setup_net+0x85/0x150
[  138.655932]  copy_net_ns+0xf5/0x200
[  138.655988]  create_new_namespaces+0x117/0x2f0
[  138.656052]  unshare_nsproxy_namespaces+0x85/0xb0
[  138.656122]  ksys_unshare+0x346/0x5e0
[  138.656179]  __x64_sys_unshare+0x12/0x20
[  138.656236]  do_syscall_64+0x104/0xfc0
[  138.656299]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.656362] RIP: 0033:0x7f96a19b3bcb
[  138.656417] 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
[  138.656545] RSP: 002b:00007ffcf3bd17b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  138.656621] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f96a19b3bcb
[  138.656696] RDX: 0000000000000000 RSI: 00007ffcf3bd1520 RDI: 0000000040000000
[  138.656771] RBP: 00007ffcf3bd1b40 R08: 00007ffcf3bd1710 R09: 0000000000000000
[  138.656845] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  138.656920] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055fcd777db68
[  138.656995]  </TASK>
[  138.657043] ---[ end trace 0000000000000000 ]---
[  138.657720] ------------[ cut here ]------------
[  138.657788] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/293
[  138.657875] Modules linked in:
[  138.657930] CPU: 2 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.658019] Tainted: [W]=WARN
[  138.658073] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.658154] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.658216] 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
[  138.658351] RSP: 0018:ff7988938052fd68 EFLAGS: 00010286
[  138.658413] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.658491] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3f40af01d79100
[  138.658567] RBP: 0000000000000000 R08: ff3f40af0335b290 R09: ff3f40af04ab9030
[  138.658641] R10: ff3f40af048e8118 R11: fefefefefefefeff R12: 0000000000000000
[  138.658719] R13: 0000000000000010 R14: ff3f40af048e8000 R15: ff3f40af01d79100
[  138.658797] FS:  000000000b6d7400(0000) GS:ff3f40af93d96000(0000) knlGS:0000000000000000
[  138.658874] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.658945] CR2: 00007f1bae8e7000 CR3: 0000000001d33002 CR4: 0000000000771ef0
[  138.659021] PKRU: 55555554
[  138.659069] Call Trace:
[  138.659123]  <TASK>
[  138.659172]  rtmsg_ifinfo+0x3c/0xa0
[  138.659227]  register_netdevice+0x889/0x9f0
[  138.659290]  __tun_chr_ioctl+0x83c/0x16c0
[  138.659348]  ? do_sys_openat2+0x9a/0xe0
[  138.659406]  __x64_sys_ioctl+0xa1/0xe0
[  138.659463]  do_syscall_64+0x104/0xfc0
[  138.659522]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.659585] RIP: 0033:0x47cc8d
[  138.659641] 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
[  138.659770] RSP: 002b:00007fffb4dff9e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.659845] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.659920] RDX: 00007fffb4dffa60 RSI: 00000000400454ca RDI: 0000000000000005
[  138.659997] RBP: 00007fffb4dffa30 R08: 0000000000000000 R09: 0000000000000000
[  138.660072] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb4dfff38
[  138.660154] R13: 00007fffb4dfffb8 R14: 0000000000000002 R15: 0000000000543540
[  138.660230]  </TASK>
[  138.660284] ---[ end trace 0000000000000000 ]---
[  138.660365] ------------[ cut here ]------------
[  138.660425] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/293
[  138.660509] Modules linked in:
[  138.660564] CPU: 2 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.660654] Tainted: [W]=WARN
[  138.660708] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.660776] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.660838] 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
[  138.660966] RSP: 0018:ff7988938052fd60 EFLAGS: 00010286
[  138.661028] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  138.661104] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3f40af01d79100
[  138.661186] RBP: 0000000000000002 R08: ff3f40af0335b290 R09: ff3f40af04ab9030
[  138.661261] R10: ff3f40af048e8118 R11: fefefefefefefeff R12: 0000000000000000
[  138.661340] R13: 0000000000000010 R14: ff3f40af048e8000 R15: ff3f40af01d79100
[  138.661419] FS:  000000000b6d7400(0000) GS:ff3f40af93d96000(0000) knlGS:0000000000000000
[  138.661496] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.661565] CR2: 00007f1bae8e7000 CR3: 0000000001d33002 CR4: 0000000000771ef0
[  138.661643] PKRU: 55555554
[  138.661691] Call Trace:
[  138.661739]  <TASK>
[  138.661787]  rtnetlink_event+0x6e/0xb0
[  138.661843]  notifier_call_chain+0x6d/0x100
[  138.661901]  netdev_update_features+0x56/0x60
[  138.661965]  __tun_chr_ioctl+0xbf1/0x16c0
[  138.662022]  ? file_init_path+0x62/0x120
[  138.662079]  __x64_sys_ioctl+0xa1/0xe0
[  138.662140]  do_syscall_64+0x104/0xfc0
[  138.662197]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.662260] RIP: 0033:0x47cc8d
[  138.662322] 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
[  138.662455] RSP: 002b:00007fffb4dffa20 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.662534] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.662611] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  138.662686] RBP: 00007fffb4dffa70 R08: 0000000000000000 R09: 0000000000000000
[  138.662762] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb4dfff38
[  138.662837] R13: 00007fffb4dfffb8 R14: 0000000000000002 R15: 0000000000543540
[  138.662915]  </TASK>
[  138.662963] ---[ end trace 0000000000000000 ]---
[  138.663044] ------------[ cut here ]------------
[  138.663114] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/293
[  138.663198] Modules linked in:
[  138.663254] CPU: 2 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.663347] Tainted: [W]=WARN
[  138.663402] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.663471] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.663535] 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
[  138.663665] RSP: 0018:ff7988938052fc10 EFLAGS: 00010286
[  138.663729] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  138.663807] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3f40af01d79100
[  138.663883] RBP: 0000000000000000 R08: ff3f40af0335b290 R09: ff3f40af04abf030
[  138.663958] R10: ff3f40af048e8118 R11: fefefefefefefeff R12: 0000000000000000
[  138.664034] R13: 0000000000000010 R14: ff3f40af048e8000 R15: ff3f40af01d79100
[  138.664121] FS:  000000000b6d7400(0000) GS:ff3f40af93d96000(0000) knlGS:0000000000000000
[  138.664199] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.664268] CR2: 00007f1bae8e7000 CR3: 0000000001d33002 CR4: 0000000000771ef0
[  138.664354] PKRU: 55555554
[  138.664402] Call Trace:
[  138.664450]  <TASK>
[  138.664498]  rtmsg_ifinfo+0x3c/0xa0
[  138.664555]  __dev_notify_flags+0xb1/0xf0
[  138.664612]  netif_change_flags+0x54/0x70
[  138.664670]  dev_change_flags+0x45/0x80
[  138.664726]  devinet_ioctl+0x607/0x7f0
[  138.664784]  inet_ioctl+0x229/0x240
[  138.664841]  ? __rtnl_unlock+0x35/0x60
[  138.664899]  sock_do_ioctl+0x75/0x140
[  138.664958]  __x64_sys_ioctl+0xa1/0xe0
[  138.665015]  do_syscall_64+0x104/0xfc0
[  138.665072]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.665139] RIP: 0033:0x47cc8d
[  138.665196] 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
[  138.665334] RSP: 002b:00007fffb4dffa00 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.665411] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.665487] RDX: 00007fffb4dffa70 RSI: 0000000000008914 RDI: 0000000000000006
[  138.665563] RBP: 00007fffb4dffa50 R08: 0000000000000000 R09: 0000000000000000
[  138.665639] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffb4dfff38
[  138.665715] R13: 00007fffb4dfffb8 R14: 0000000000000002 R15: 0000000000543540
[  138.665793]  </TASK>
[  138.665841] ---[ end trace 0000000000000000 ]---
[  183.644322] ------------[ cut here ]------------
[  183.644481] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/293
[  183.644580] Modules linked in:
[  183.644642] CPU: 2 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.644739] Tainted: [W]=WARN
[  183.644794] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.644868] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.644933] 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
[  183.645069] RSP: 0018:ff7988938052fb58 EFLAGS: 00010286
[  183.645300] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  183.645382] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3f40af01d79600
[  183.645465] RBP: 0000000000000000 R08: ff3f40af0335b290 R09: ff3f40af04abf030
[  183.645542] R10: ff3f40af048e8118 R11: fefefefefefefeff R12: 0000000000000000
[  183.645619] R13: 0000000000000010 R14: ff3f40af048e8000 R15: ff3f40af01d79600
[  183.645697] FS:  0000000000000000(0000) GS:ff3f40af93d96000(0000) knlGS:0000000000000000
[  183.645774] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.645841] CR2: 00007f1bae8e7000 CR3: 0000000025242003 CR4: 0000000000771ef0
[  183.645918] PKRU: 55555554
[  183.645965] Call Trace:
[  183.646015]  <TASK>
[  183.646063]  rtmsg_ifinfo+0x3c/0xa0
[  183.646127]  netif_close_many+0xed/0x190
[  183.646185]  unregister_netdevice_many_notify+0x267/0x9d0
[  183.646250]  ? __queue_work+0x141/0x550
[  183.646308]  unregister_netdevice_queue+0x9e/0xd0
[  183.646371]  __tun_detach+0x591/0x5b0
[  183.646438]  tun_chr_close+0x3f/0xc0
[  183.646495]  __fput+0xe8/0x2c0
[  183.646553]  task_work_run+0x63/0xa0
[  183.646610]  do_exit+0x2c1/0xba0
[  183.646667]  ? netlink_recvmsg+0x18d/0x310
[  183.646724]  do_group_exit+0x2d/0xc0
[  183.646781]  get_signal+0x82e/0x900
[  183.646838]  arch_do_signal_or_restart+0x77/0x2b0
[  183.646905]  exit_to_user_mode_loop+0x75/0x4a0
[  183.646970]  do_syscall_64+0x439/0xfc0
[  183.647028]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.647093] RIP: 0033:0x4c2d9e
[  183.647153] Code: Unable to access opcode bytes at 0x4c2d74.
[  183.647222] RSP: 002b:00007fffb4dff390 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  183.647299] RAX: 0000000000000014 RBX: 00007fffb4dff420 RCX: 00000000004c2d9e
[  183.647376] RDX: 0000000000000000 RSI: 00007fffb4dff430 RDI: 0000000000000007
[  183.647458] RBP: 00007fffb4dff3a0 R08: 0000000000000000 R09: 0000000000000000
[  183.647536] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffb4dff414
[  183.647612] R13: 00007fffb4dfffb8 R14: 00007fffb4dff560 R15: 0000000000543540
[  183.647688]  </TASK>
[  183.647736] ---[ end trace 0000000000000000 ]---
[  183.647887] ------------[ cut here ]------------
[  183.647927] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/293
[  183.647983] Modules linked in:
[  183.648008] CPU: 3 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.648074] Tainted: [W]=WARN
[  183.648097] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.648142] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.648169] 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
[  183.648263] RSP: 0018:ff7988938052fbc8 EFLAGS: 00010286
[  183.648287] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.648328] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3f40af02febf00
[  183.648371] RBP: 0000000000000000 R08: ff3f40af0335b290 R09: ff3f40af04b23030
[  183.648422] R10: ff3f40af048e8118 R11: fefefefefefefeff R12: 0000000000000000
[  183.648469] R13: 0000000000000011 R14: ff3f40af048e8000 R15: ff3f40af02febf00
[  183.648513] FS:  0000000000000000(0000) GS:ff3f40af93e16000(0000) knlGS:0000000000000000
[  183.648552] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.648587] CR2: 00007fea88067f98 CR3: 0000000025242003 CR4: 0000000000771ef0
[  183.648631] PKRU: 55555554
[  183.648645] Call Trace:
[  183.648660]  <TASK>
[  183.648673]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.648702]  unregister_netdevice_queue+0x9e/0xd0
[  183.648733]  __tun_detach+0x591/0x5b0
[  183.648756]  tun_chr_close+0x3f/0xc0
[  183.648780]  __fput+0xe8/0x2c0
[  183.648805]  task_work_run+0x63/0xa0
[  183.648828]  do_exit+0x2c1/0xba0
[  183.648846]  ? netlink_recvmsg+0x18d/0x310
[  183.648869]  do_group_exit+0x2d/0xc0
[  183.648892]  get_signal+0x82e/0x900
[  183.648912]  arch_do_signal_or_restart+0x77/0x2b0
[  183.648940]  exit_to_user_mode_loop+0x75/0x4a0
[  183.648969]  do_syscall_64+0x439/0xfc0
[  183.648991]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.649018] RIP: 0033:0x4c2d9e
[  183.649039] Code: Unable to access opcode bytes at 0x4c2d74.
[  183.649072] RSP: 002b:00007fffb4dff390 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  183.649118] RAX: 0000000000000014 RBX: 00007fffb4dff420 RCX: 00000000004c2d9e
[  183.649152] RDX: 0000000000000000 RSI: 00007fffb4dff430 RDI: 0000000000000007
[  183.649193] RBP: 00007fffb4dff3a0 R08: 0000000000000000 R09: 0000000000000000
[  183.649233] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fffb4dff414
[  183.649274] R13: 00007fffb4dfffb8 R14: 00007fffb4dff560 R15: 0000000000543540
[  183.649314]  </TASK>
[  183.649329] ---[ end trace 0000000000000000 ]---
[  183.658227] ------------[ cut here ]------------
[  183.658261] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:0/12
[  183.658326] Modules linked in:
[  183.658351] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.658416] Tainted: [W]=WARN
[  183.658438] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.658473] Workqueue: netns cleanup_net
[  183.658496] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.658524] 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
[  183.658612] RSP: 0018:ff79889380067c78 EFLAGS: 00010286
[  183.658639] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.658679] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3f40af02fe9800
[  183.658719] RBP: 0000000000000000 R08: ff3f40af018f3d10 R09: ff3f40af06d9702c
[  183.658756] R10: ff3f40af02061118 R11: fefefefefefefeff R12: 0000000000000000
[  183.658791] R13: 0000000000000011 R14: ff3f40af02061000 R15: ff3f40af02fe9800
[  183.658833] FS:  0000000000000000(0000) GS:ff3f40af93c96000(0000) knlGS:0000000000000000
[  183.658872] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.658906] CR2: 00007f7fb16c6f98 CR3: 0000000025242004 CR4: 0000000000771ef0
[  183.658948] PKRU: 55555554
[  183.658965] Call Trace:
[  183.658981]  <TASK>
[  183.658997]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.659033]  default_device_exit_batch+0x318/0x390
[  183.659061]  ops_undo_list+0x10b/0x240
[  183.659084]  cleanup_net+0x1d7/0x2e0
[  183.659105]  process_one_work+0x162/0x360
[  183.659135]  worker_thread+0x16e/0x2d0
[  183.659157]  ? rescuer_thread+0x510/0x510
[  183.659180]  kthread+0xe1/0x120
[  183.659204]  ? kthread_park+0xa0/0xa0
[  183.659227]  ret_from_fork+0x16d/0x250
[  183.659249]  ? kthread_park+0xa0/0xa0
[  183.659272]  ret_from_fork_asm+0x11/0x20
[  183.659297]  </TASK>
[  183.659311] ---[ end trace 0000000000000000 ]---