[  320.527182] ------------[ cut here ]------------
[  320.527234] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/469
[  320.527293] Modules linked in:
[  320.527320] CPU: 0 UID: 0 PID: 469 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.527378] Tainted: [W]=WARN
[  320.527399] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.527427] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.527459] 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
[  320.527564] RSP: 0018:ff71f0c3807bfcc8 EFLAGS: 00010286
[  320.527593] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.527636] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108182a800
[  320.527675] RBP: 0000000000000000 R08: ff2323108193c490 R09: ff232310819bc02c
[  320.527714] R10: ff232310819ba118 R11: fefefefefefefeff R12: 0000000000000000
[  320.527756] R13: 0000000000000010 R14: ff232310819ba000 R15: ff2323108182a800
[  320.527802] FS:  00007f7cf13a6740(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  320.527847] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.527884] CR2: 000055d582ed3008 CR3: 00000000031bb002 CR4: 0000000000771ef0
[  320.527924] PKRU: 55555554
[  320.527940] Call Trace:
[  320.527956]  <TASK>
[  320.527973]  rtmsg_ifinfo+0x3c/0xa0
[  320.528013]  register_netdevice+0x889/0x9f0
[  320.528037]  register_netdev+0x1e/0x30
[  320.528056]  loopback_net_init+0x57/0xb0
[  320.528081]  ? vsock_sysctl_init_net+0xb6/0x140
[  320.528112]  ops_init+0x68/0x140
[  320.528138]  setup_net+0x85/0x150
[  320.528158]  copy_net_ns+0xf5/0x200
[  320.528181]  create_new_namespaces+0x117/0x2f0
[  320.528214]  unshare_nsproxy_namespaces+0x85/0xb0
[  320.528241]  ksys_unshare+0x346/0x5e0
[  320.528267]  __x64_sys_unshare+0x12/0x20
[  320.528288]  do_syscall_64+0x104/0xfc0
[  320.528312]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.528341] RIP: 0033:0x7f7cf14a1bcb
[  320.528364] 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
[  320.528466] RSP: 002b:00007ffd4eb495e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  320.528506] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7cf14a1bcb
[  320.528548] RDX: 0000000000000000 RSI: 00007ffd4eb49350 RDI: 0000000040000000
[  320.528590] RBP: 00007ffd4eb49970 R08: 00007ffd4eb49540 R09: 0000000000000000
[  320.528632] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  320.528669] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055d57f48bb68
[  320.528714]  </TASK>
[  320.528729] ---[ end trace 0000000000000000 ]---
[  320.529374] ------------[ cut here ]------------
[  320.529403] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/469
[  320.529459] Modules linked in:
[  320.529482] CPU: 0 UID: 0 PID: 469 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.529541] Tainted: [W]=WARN
[  320.529561] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.529594] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.529623] 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
[  320.529721] RSP: 0018:ff71f0c3807bfd68 EFLAGS: 00010286
[  320.529750] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  320.529791] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108182a800
[  320.529833] RBP: 0000000000000000 R08: ff232310830d4a10 R09: ff23231082df8030
[  320.529873] R10: ff23231086e34118 R11: fefefefefefefeff R12: 0000000000000000
[  320.529913] R13: 0000000000000010 R14: ff23231086e34000 R15: ff2323108182a800
[  320.529956] FS:  0000000017df8400(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  320.530015] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.530050] CR2: 00007fc8b3c43000 CR3: 000000000183b003 CR4: 0000000000771ef0
[  320.530096] PKRU: 55555554
[  320.530108] Call Trace:
[  320.530121]  <TASK>
[  320.530138]  rtmsg_ifinfo+0x3c/0xa0
[  320.530160]  register_netdevice+0x889/0x9f0
[  320.530181]  __tun_chr_ioctl+0x83c/0x16c0
[  320.530205]  ? do_sys_openat2+0x9a/0xe0
[  320.530228]  __x64_sys_ioctl+0xa1/0xe0
[  320.530254]  do_syscall_64+0x104/0xfc0
[  320.530276]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.530305] RIP: 0033:0x47cc8d
[  320.530327] 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
[  320.530422] RSP: 002b:00007ffc6d4f5c30 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.530464] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.530507] RDX: 00007ffc6d4f5cb0 RSI: 00000000400454ca RDI: 0000000000000005
[  320.530551] RBP: 00007ffc6d4f5c80 R08: 0000000000000000 R09: 0000000000000000
[  320.530591] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc6d4f6188
[  320.530633] R13: 00007ffc6d4f6208 R14: 0000000000000002 R15: 0000000000543540
[  320.530673]  </TASK>
[  320.530687] ---[ end trace 0000000000000000 ]---
[  320.530727] ------------[ cut here ]------------
[  320.530756] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/469
[  320.530807] Modules linked in:
[  320.530828] CPU: 0 UID: 0 PID: 469 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.530884] Tainted: [W]=WARN
[  320.530903] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.530938] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.530964] 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
[  320.531073] RSP: 0018:ff71f0c3807bfd60 EFLAGS: 00010286
[  320.531103] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  320.531144] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108182a800
[  320.531185] RBP: 0000000000000002 R08: ff232310830d4a10 R09: ff23231082df8030
[  320.531229] R10: ff23231086e34118 R11: fefefefefefefeff R12: 0000000000000000
[  320.531270] R13: 0000000000000010 R14: ff23231086e34000 R15: ff2323108182a800
[  320.531313] FS:  0000000017df8400(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  320.531355] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.531391] CR2: 00007fc8b3c43000 CR3: 000000000183b003 CR4: 0000000000771ef0
[  320.531432] PKRU: 55555554
[  320.531445] Call Trace:
[  320.531459]  <TASK>
[  320.531472]  rtnetlink_event+0x6e/0xb0
[  320.531492]  notifier_call_chain+0x6d/0x100
[  320.531517]  netdev_update_features+0x56/0x60
[  320.531542]  __tun_chr_ioctl+0xbf1/0x16c0
[  320.531563]  ? file_init_path+0x62/0x120
[  320.531586]  __x64_sys_ioctl+0xa1/0xe0
[  320.531608]  do_syscall_64+0x104/0xfc0
[  320.531628]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.531656] RIP: 0033:0x47cc8d
[  320.531676] 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
[  320.531767] RSP: 002b:00007ffc6d4f5c70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.531807] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.531847] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  320.531887] RBP: 00007ffc6d4f5cc0 R08: 0000000000000005 R09: 0000000000000300
[  320.531927] R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffc6d4f6188
[  320.531968] R13: 00007ffc6d4f6208 R14: 0000000000000002 R15: 0000000000543540
[  320.532016]  </TASK>
[  320.532030] ---[ end trace 0000000000000000 ]---
[  320.532072] ------------[ cut here ]------------
[  320.532103] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/469
[  320.532152] Modules linked in:
[  320.532175] CPU: 0 UID: 0 PID: 469 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  320.532233] Tainted: [W]=WARN
[  320.532255] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  320.532290] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  320.532319] 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
[  320.532416] RSP: 0018:ff71f0c3807bfc10 EFLAGS: 00010286
[  320.532444] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  320.532487] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108182a800
[  320.532527] RBP: 0000000000000000 R08: ff232310830d4a10 R09: ff23231082060030
[  320.532568] R10: ff23231086e34118 R11: fefefefefefefeff R12: 0000000000000000
[  320.532607] R13: 0000000000000010 R14: ff23231086e34000 R15: ff2323108182a800
[  320.532651] FS:  0000000017df8400(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  320.532695] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  320.532727] CR2: 00007fc8b3c43000 CR3: 000000000183b003 CR4: 0000000000771ef0
[  320.532767] PKRU: 55555554
[  320.532779] Call Trace:
[  320.532792]  <TASK>
[  320.532808]  rtmsg_ifinfo+0x3c/0xa0
[  320.532829]  __dev_notify_flags+0xb1/0xf0
[  320.532854]  netif_change_flags+0x54/0x70
[  320.532877]  dev_change_flags+0x45/0x80
[  320.532897]  devinet_ioctl+0x607/0x7f0
[  320.532919]  inet_ioctl+0x229/0x240
[  320.532943]  ? __rtnl_unlock+0x35/0x60
[  320.532964]  sock_do_ioctl+0x75/0x140
[  320.532985]  __x64_sys_ioctl+0xa1/0xe0
[  320.533013]  do_syscall_64+0x104/0xfc0
[  320.533036]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  320.533067] RIP: 0033:0x47cc8d
[  320.533088] 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
[  320.533181] RSP: 002b:00007ffc6d4f5c50 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  320.533221] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  320.533263] RDX: 00007ffc6d4f5cc0 RSI: 0000000000008914 RDI: 0000000000000006
[  320.533306] RBP: 00007ffc6d4f5ca0 R08: 0000000000000005 R09: 0000000000000300
[  320.533350] R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffc6d4f6188
[  320.533399] R13: 00007ffc6d4f6208 R14: 0000000000000002 R15: 0000000000543540
[  320.533441]  </TASK>
[  320.533456] ---[ end trace 0000000000000000 ]---
[  365.513896] ------------[ cut here ]------------
[  365.513965] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/469
[  365.514030] Modules linked in:
[  365.514057] CPU: 0 UID: 0 PID: 469 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.514114] Tainted: [W]=WARN
[  365.514137] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.514183] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.514215] 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
[  365.514322] RSP: 0018:ff71f0c3807bfb58 EFLAGS: 00010286
[  365.514353] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  365.514399] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108182a400
[  365.514443] RBP: 0000000000000000 R08: ff232310830d4a10 R09: ff23231082060030
[  365.514487] R10: ff23231086e34118 R11: fefefefefefefeff R12: 0000000000000000
[  365.514534] R13: 0000000000000010 R14: ff23231086e34000 R15: ff2323108182a400
[  365.514583] FS:  0000000000000000(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  365.514630] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.514669] CR2: 00007f5dfb9686f0 CR3: 0000000001913004 CR4: 0000000000771ef0
[  365.514718] PKRU: 55555554
[  365.514733] Call Trace:
[  365.514753]  <TASK>
[  365.514770]  rtmsg_ifinfo+0x3c/0xa0
[  365.514796]  netif_close_many+0xed/0x190
[  365.514818]  unregister_netdevice_many_notify+0x267/0x9d0
[  365.514849]  ? __queue_work+0x141/0x550
[  365.514877]  unregister_netdevice_queue+0x9e/0xd0
[  365.514905]  __tun_detach+0x591/0x5b0
[  365.514929]  tun_chr_close+0x3f/0xc0
[  365.514950]  __fput+0xe8/0x2c0
[  365.514978]  task_work_run+0x63/0xa0
[  365.515002]  do_exit+0x2c1/0xba0
[  365.515027]  ? netlink_dump+0x336/0x450
[  365.515054]  do_group_exit+0x2d/0xc0
[  365.515078]  get_signal+0x82e/0x900
[  365.515104]  arch_do_signal_or_restart+0x77/0x2b0
[  365.515137]  exit_to_user_mode_loop+0x75/0x4a0
[  365.515173]  do_syscall_64+0x439/0xfc0
[  365.515197]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  365.515229] RIP: 0033:0x4c2d9e
[  365.515255] Code: Unable to access opcode bytes at 0x4c2d74.
[  365.515291] RSP: 002b:00007ffc6d4f55e0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  365.515334] RAX: 0000000000000050 RBX: 00007ffc6d4f5670 RCX: 00000000004c2d9e
[  365.515375] RDX: 0000000000000000 RSI: 00007ffc6d4f5680 RDI: 0000000000000007
[  365.515418] RBP: 00007ffc6d4f55f0 R08: 0000000000000000 R09: 0000000000000000
[  365.515463] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc6d4f5664
[  365.515508] R13: 00007ffc6d4f6208 R14: 00007ffc6d4f57b0 R15: 0000000000543540
[  365.515551]  </TASK>
[  365.515567] ---[ end trace 0000000000000000 ]---
[  365.515679] ------------[ cut here ]------------
[  365.515709] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/469
[  365.515760] Modules linked in:
[  365.515782] CPU: 0 UID: 0 PID: 469 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.515839] Tainted: [W]=WARN
[  365.515861] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.515896] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.515927] 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
[  365.516191] RSP: 0018:ff71f0c3807bfbc8 EFLAGS: 00010286
[  365.516224] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  365.516271] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108182a400
[  365.516315] RBP: 0000000000000000 R08: ff232310830d4a10 R09: ff23231086782030
[  365.516363] R10: ff23231086e34118 R11: fefefefefefefeff R12: 0000000000000000
[  365.516410] R13: 0000000000000011 R14: ff23231086e34000 R15: ff2323108182a400
[  365.516463] FS:  0000000000000000(0000) GS:ff23231129696000(0000) knlGS:0000000000000000
[  365.516510] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.516546] CR2: 00007f5dfb9686f0 CR3: 0000000001913004 CR4: 0000000000771ef0
[  365.516587] PKRU: 55555554
[  365.516602] Call Trace:
[  365.516617]  <TASK>
[  365.516631]  unregister_netdevice_many_notify+0x877/0x9d0
[  365.516664]  unregister_netdevice_queue+0x9e/0xd0
[  365.516690]  __tun_detach+0x591/0x5b0
[  365.516714]  tun_chr_close+0x3f/0xc0
[  365.516735]  __fput+0xe8/0x2c0
[  365.516755]  task_work_run+0x63/0xa0
[  365.516776]  do_exit+0x2c1/0xba0
[  365.516799]  ? netlink_dump+0x336/0x450
[  365.516822]  do_group_exit+0x2d/0xc0
[  365.516844]  get_signal+0x82e/0x900
[  365.516865]  arch_do_signal_or_restart+0x77/0x2b0
[  365.516895]  exit_to_user_mode_loop+0x75/0x4a0
[  365.516925]  do_syscall_64+0x439/0xfc0
[  365.516948]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  365.516979] RIP: 0033:0x4c2d9e
[  365.517000] Code: Unable to access opcode bytes at 0x4c2d74.
[  365.517034] RSP: 002b:00007ffc6d4f55e0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  365.517082] RAX: 0000000000000050 RBX: 00007ffc6d4f5670 RCX: 00000000004c2d9e
[  365.517126] RDX: 0000000000000000 RSI: 00007ffc6d4f5680 RDI: 0000000000000007
[  365.517170] RBP: 00007ffc6d4f55f0 R08: 0000000000000000 R09: 0000000000000000
[  365.517214] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc6d4f5664
[  365.517261] R13: 00007ffc6d4f6208 R14: 00007ffc6d4f57b0 R15: 0000000000543540
[  365.517305]  </TASK>
[  365.517319] ---[ end trace 0000000000000000 ]---
[  365.531133] ------------[ cut here ]------------
[  365.531170] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:0/12
[  365.531233] Modules linked in:
[  365.531262] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  365.531325] Tainted: [W]=WARN
[  365.531346] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  365.531383] Workqueue: netns cleanup_net
[  365.531405] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  365.531436] 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
[  365.531532] RSP: 0018:ff71f0c380067c78 EFLAGS: 00010286
[  365.531562] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  365.531602] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2323108188ea00
[  365.531640] RBP: 0000000000000000 R08: ff2323108193c490 R09: ff2323108748002c
[  365.531682] R10: ff232310819ba118 R11: fefefefefefefeff R12: 0000000000000000
[  365.531722] R13: 0000000000000011 R14: ff232310819ba000 R15: ff2323108188ea00
[  365.531774] FS:  0000000000000000(0000) GS:ff23231129816000(0000) knlGS:0000000000000000
[  365.531824] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  365.531859] CR2: 00007f396985af98 CR3: 0000000020c42005 CR4: 0000000000771ef0
[  365.531900] PKRU: 55555554
[  365.531914] Call Trace:
[  365.531928]  <TASK>
[  365.531941]  unregister_netdevice_many_notify+0x877/0x9d0
[  365.531972]  default_device_exit_batch+0x318/0x390
[  365.532011]  ops_undo_list+0x10b/0x240
[  365.532035]  cleanup_net+0x1d7/0x2e0
[  365.532059]  process_one_work+0x162/0x360
[  365.532085]  worker_thread+0x16e/0x2d0
[  365.532109]  ? rescuer_thread+0x510/0x510
[  365.532132]  kthread+0xe1/0x120
[  365.532160]  ? kthread_park+0xa0/0xa0
[  365.532180]  ret_from_fork+0x16d/0x250
[  365.532203]  ? kthread_park+0xa0/0xa0
[  365.532227]  ret_from_fork_asm+0x11/0x20
[  365.532252]  </TASK>
[  365.532265] ---[ end trace 0000000000000000 ]---