[    2.439309] ------------[ cut here ]------------
[    2.439348] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/160
[    2.439389] Modules linked in:
[    2.439406] CPU: 0 UID: 0 PID: 160 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.439441] Tainted: [W]=WARN
[    2.439453] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.439478] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.439497] 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
[    2.439551] RSP: 0018:ff71be0f403ffcc8 EFLAGS: 00010286
[    2.439570] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.439593] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2449e0c18fdc00
[    2.439616] RBP: 0000000000000000 R08: ff2449e0c1daf550 R09: ff2449e0c49a302c
[    2.439641] R10: ff2449e0c317e118 R11: fefefefefefefeff R12: 0000000000000000
[    2.439662] R13: 0000000000000010 R14: ff2449e0c317e000 R15: ff2449e0c18fdc00
[    2.439692] FS:  00007f913a4f5740(0000) GS:ff2449e173096000(0000) knlGS:0000000000000000
[    2.439718] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.439738] CR2: 00007f913a5c0820 CR3: 0000000003307002 CR4: 0000000000771ef0
[    2.439760] PKRU: 55555554
[    2.439768] Call Trace:
[    2.439781]  <TASK>
[    2.439792]  rtmsg_ifinfo+0x3c/0xa0
[    2.439804]  register_netdevice+0x889/0x9f0
[    2.439818]  register_netdev+0x1e/0x30
[    2.439830]  loopback_net_init+0x57/0xb0
[    2.439846]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.439864]  ops_init+0x68/0x140
[    2.439878]  setup_net+0x85/0x150
[    2.439890]  copy_net_ns+0xf5/0x200
[    2.439904]  create_new_namespaces+0x117/0x2f0
[    2.439920]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.439936]  ksys_unshare+0x346/0x5e0
[    2.439951]  __x64_sys_unshare+0x12/0x20
[    2.439965]  do_syscall_64+0x104/0xfc0
[    2.439982]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.440000] RIP: 0033:0x7f913a5f0bcb
[    2.440015] 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
[    2.440066] RSP: 002b:00007ffd3b9fba18 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.440087] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f913a5f0bcb
[    2.440109] RDX: 0000000000000000 RSI: 00007ffd3b9fb780 RDI: 0000000040000000
[    2.440136] RBP: 00007ffd3b9fbda0 R08: 00007ffd3b9fb970 R09: 0000000000000000
[    2.440161] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.440181] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000562993523b68
[    2.440213]  </TASK>
[    2.440222] ---[ end trace 0000000000000000 ]---
[    2.443259] ------------[ cut here ]------------
[    2.443280] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/160
[    2.443308] Modules linked in:
[    2.443322] CPU: 0 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.443355] Tainted: [W]=WARN
[    2.443367] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.443385] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.443403] 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
[    2.443453] RSP: 0018:ff71be0f403ffd68 EFLAGS: 00010286
[    2.443471] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.443496] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2449e0c18fdc00
[    2.443520] RBP: 0000000000000000 R08: ff2449e0c2aeed50 R09: ff2449e0c49a0030
[    2.443545] R10: ff2449e0c4938118 R11: fefefefefefefeff R12: 0000000000000000
[    2.443570] R13: 0000000000000010 R14: ff2449e0c4938000 R15: ff2449e0c18fdc00
[    2.443592] FS:  0000000018be4400(0000) GS:ff2449e173096000(0000) knlGS:0000000000000000
[    2.443616] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.443637] CR2: 00007f5a21886000 CR3: 0000000002af7003 CR4: 0000000000771ef0
[    2.443658] PKRU: 55555554
[    2.443666] Call Trace:
[    2.443675]  <TASK>
[    2.443683]  rtmsg_ifinfo+0x3c/0xa0
[    2.443697]  register_netdevice+0x889/0x9f0
[    2.443710]  __tun_chr_ioctl+0x83c/0x16c0
[    2.443724]  ? do_sys_openat2+0x9a/0xe0
[    2.443738]  __x64_sys_ioctl+0xa1/0xe0
[    2.443752]  do_syscall_64+0x104/0xfc0
[    2.443767]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.443787] RIP: 0033:0x47cc8d
[    2.443800] 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
[    2.443851] RSP: 002b:00007ffc00fa1420 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.443878] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.443901] RDX: 00007ffc00fa14a0 RSI: 00000000400454ca RDI: 0000000000000005
[    2.443922] RBP: 00007ffc00fa1470 R08: 0000000000000000 R09: 0000000000000000
[    2.443945] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc00fa1978
[    2.443969] R13: 00007ffc00fa19f8 R14: 0000000000000002 R15: 0000000000543540
[    2.443993]  </TASK>
[    2.444000] ---[ end trace 0000000000000000 ]---
[    2.444032] ------------[ cut here ]------------
[    2.444047] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/160
[    2.444078] Modules linked in:
[    2.444090] CPU: 0 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.444128] Tainted: [W]=WARN
[    2.444138] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.444157] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.444176] 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
[    2.444231] RSP: 0018:ff71be0f403ffd60 EFLAGS: 00010286
[    2.444250] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.444276] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2449e0c18fdc00
[    2.444301] RBP: 0000000000000002 R08: ff2449e0c2aeed50 R09: ff2449e0c49a0030
[    2.444321] R10: ff2449e0c4938118 R11: fefefefefefefeff R12: 0000000000000000
[    2.444346] R13: 0000000000000010 R14: ff2449e0c4938000 R15: ff2449e0c18fdc00
[    2.444369] FS:  0000000018be4400(0000) GS:ff2449e173096000(0000) knlGS:0000000000000000
[    2.444394] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.444414] CR2: 00007f5a21886000 CR3: 0000000002af7003 CR4: 0000000000771ef0
[    2.444439] PKRU: 55555554
[    2.444447] Call Trace:
[    2.444454]  <TASK>
[    2.444464]  rtnetlink_event+0x6e/0xb0
[    2.444480]  notifier_call_chain+0x6d/0x100
[    2.444495]  netdev_update_features+0x56/0x60
[    2.444513]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.444525]  ? file_init_path+0x62/0x120
[    2.444538]  __x64_sys_ioctl+0xa1/0xe0
[    2.444551]  do_syscall_64+0x104/0xfc0
[    2.444563]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.444579] RIP: 0033:0x47cc8d
[    2.444591] 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
[    2.444645] RSP: 002b:00007ffc00fa1460 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.444669] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.444692] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.444717] RBP: 00007ffc00fa14b0 R08: 0000000000000000 R09: 0000000000000000
[    2.444739] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc00fa1978
[    2.444762] R13: 00007ffc00fa19f8 R14: 0000000000000002 R15: 0000000000543540
[    2.444788]  </TASK>
[    2.444796] ---[ end trace 0000000000000000 ]---
[    2.444826] ------------[ cut here ]------------
[    2.444844] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/160
[    2.444870] Modules linked in:
[    2.444884] CPU: 0 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.444916] Tainted: [W]=WARN
[    2.444930] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.444947] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.444964] 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
[    2.445014] RSP: 0018:ff71be0f403ffc10 EFLAGS: 00010286
[    2.445031] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.445052] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2449e0c18fdc00
[    2.445077] RBP: 0000000000000000 R08: ff2449e0c2aeed50 R09: ff2449e0c49a5030
[    2.445096] R10: ff2449e0c4938118 R11: fefefefefefefeff R12: 0000000000000000
[    2.445123] R13: 0000000000000010 R14: ff2449e0c4938000 R15: ff2449e0c18fdc00
[    2.445150] FS:  0000000018be4400(0000) GS:ff2449e173096000(0000) knlGS:0000000000000000
[    2.445177] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.445195] CR2: 00007f5a21886000 CR3: 0000000002af7003 CR4: 0000000000771ef0
[    2.445223] PKRU: 55555554
[    2.445231] Call Trace:
[    2.445240]  <TASK>
[    2.445248]  rtmsg_ifinfo+0x3c/0xa0
[    2.445262]  __dev_notify_flags+0xb1/0xf0
[    2.445276]  netif_change_flags+0x54/0x70
[    2.445288]  dev_change_flags+0x45/0x80
[    2.445298]  devinet_ioctl+0x607/0x7f0
[    2.445316]  inet_ioctl+0x229/0x240
[    2.445330]  ? __rtnl_unlock+0x35/0x60
[    2.445341]  sock_do_ioctl+0x75/0x140
[    2.445356]  __x64_sys_ioctl+0xa1/0xe0
[    2.445367]  do_syscall_64+0x104/0xfc0
[    2.445379]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.445396] RIP: 0033:0x47cc8d
[    2.445409] 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
[    2.445457] RSP: 002b:00007ffc00fa1440 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.445482] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.445503] RDX: 00007ffc00fa14b0 RSI: 0000000000008914 RDI: 0000000000000006
[    2.445526] RBP: 00007ffc00fa1490 R08: 0000000000000000 R09: 0000000000000000
[    2.445547] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc00fa1978
[    2.445567] R13: 00007ffc00fa19f8 R14: 0000000000000002 R15: 0000000000543540
[    2.445590]  </TASK>
[    2.445597] ---[ end trace 0000000000000000 ]---
[   47.416480] ------------[ cut here ]------------
[   47.416562] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/160
[   47.416634] Modules linked in:
[   47.416660] CPU: 0 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.416709] Tainted: [W]=WARN
[   47.416724] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.416747] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.416772] 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
[   47.416831] RSP: 0018:ff71be0f403ffb58 EFLAGS: 00010286
[   47.416853] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.416879] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2449e0c3164600
[   47.416904] RBP: 0000000000000000 R08: ff2449e0c2aeed50 R09: ff2449e0c49a5030
[   47.416928] R10: ff2449e0c4938118 R11: fefefefefefefeff R12: 0000000000000000
[   47.416952] R13: 0000000000000010 R14: ff2449e0c4938000 R15: ff2449e0c3164600
[   47.416983] FS:  0000000000000000(0000) GS:ff2449e173096000(0000) knlGS:0000000000000000
[   47.417009] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.417032] CR2: 00007f5a21886000 CR3: 000000003b042004 CR4: 0000000000771ef0
[   47.417056] PKRU: 55555554
[   47.417064] Call Trace:
[   47.417077]  <TASK>
[   47.417087]  rtmsg_ifinfo+0x3c/0xa0
[   47.417102]  netif_close_many+0xed/0x190
[   47.417117]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.417134]  ? __queue_work+0x141/0x550
[   47.417150]  unregister_netdevice_queue+0x9e/0xd0
[   47.417166]  __tun_detach+0x591/0x5b0
[   47.417180]  tun_chr_close+0x3f/0xc0
[   47.417195]  __fput+0xe8/0x2c0
[   47.417212]  task_work_run+0x63/0xa0
[   47.417226]  do_exit+0x2c1/0xba0
[   47.417244]  ? __x64_sys_close+0x47/0xa0
[   47.417258]  do_group_exit+0x2d/0xc0
[   47.417271]  get_signal+0x82e/0x900
[   47.417285]  ? fsnotify_grab_connector+0x4a/0x90
[   47.417303]  arch_do_signal_or_restart+0x77/0x2b0
[   47.417325]  ? __call_rcu_common.constprop.0+0x9a/0x340
[   47.417342]  ? __fput+0x17f/0x2c0
[   47.417358]  exit_to_user_mode_loop+0x75/0x4a0
[   47.417377]  do_syscall_64+0x439/0xfc0
[   47.417393]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.417413] RIP: 0033:0x47fb83
[   47.417427] Code: Unable to access opcode bytes at 0x47fb59.
[   47.417451] RSP: 002b:00007ffc00fa0f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   47.417519] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[   47.417603] RDX: 000000000000000e RSI: d12d4f202ebc71d9 RDI: 0000000000000007
[   47.417666] RBP: 00007ffc00fa1410 R08: 0000000000000041 R09: 0000000018be53e0
[   47.417693] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[   47.417713] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[   47.417751]  </TASK>
[   47.417762] ---[ end trace 0000000000000000 ]---
[   47.417841] ------------[ cut here ]------------
[   47.417862] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/160
[   47.417891] Modules linked in:
[   47.417907] CPU: 0 UID: 0 PID: 160 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.417945] Tainted: [W]=WARN
[   47.417959] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.417979] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.417995] 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
[   47.418045] RSP: 0018:ff71be0f403ffbc8 EFLAGS: 00010286
[   47.418064] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.418125] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2449e0c3164600
[   47.418148] RBP: 0000000000000000 R08: ff2449e0c2aeed50 R09: ff2449e0c49ac830
[   47.418198] R10: ff2449e0c4938118 R11: fefefefefefefeff R12: 0000000000000000
[   47.418279] R13: 0000000000000011 R14: ff2449e0c4938000 R15: ff2449e0c3164600
[   47.418308] FS:  0000000000000000(0000) GS:ff2449e173096000(0000) knlGS:0000000000000000
[   47.418338] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.418358] CR2: 00007f5a21886000 CR3: 000000003b042004 CR4: 0000000000771ef0
[   47.418383] PKRU: 55555554
[   47.418391] Call Trace:
[   47.418399]  <TASK>
[   47.418410]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.418428]  unregister_netdevice_queue+0x9e/0xd0
[   47.418443]  __tun_detach+0x591/0x5b0
[   47.418500]  tun_chr_close+0x3f/0xc0
[   47.418518]  __fput+0xe8/0x2c0
[   47.418570]  task_work_run+0x63/0xa0
[   47.418582]  do_exit+0x2c1/0xba0
[   47.418604]  ? __x64_sys_close+0x47/0xa0
[   47.418623]  do_group_exit+0x2d/0xc0
[   47.418639]  get_signal+0x82e/0x900
[   47.418652]  ? fsnotify_grab_connector+0x4a/0x90
[   47.418667]  arch_do_signal_or_restart+0x77/0x2b0
[   47.418687]  ? __call_rcu_common.constprop.0+0x9a/0x340
[   47.418702]  ? __fput+0x17f/0x2c0
[   47.418714]  exit_to_user_mode_loop+0x75/0x4a0
[   47.418731]  do_syscall_64+0x439/0xfc0
[   47.418743]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.418761] RIP: 0033:0x47fb83
[   47.418773] Code: Unable to access opcode bytes at 0x47fb59.
[   47.418790] RSP: 002b:00007ffc00fa0f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   47.418811] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[   47.418836] RDX: 000000000000000e RSI: d12d4f202ebc71d9 RDI: 0000000000000007
[   47.418857] RBP: 00007ffc00fa1410 R08: 0000000000000041 R09: 0000000018be53e0
[   47.418884] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[   47.418913] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[   47.418937]  </TASK>
[   47.418945] ---[ end trace 0000000000000000 ]---
[   47.428706] ------------[ cut here ]------------
[   47.428753] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:1/64
[   47.428793] Modules linked in:
[   47.428808] CPU: 3 UID: 0 PID: 64 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.428845] Tainted: [W]=WARN
[   47.428857] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.428878] Workqueue: netns cleanup_net
[   47.428896] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.428956] 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
[   47.429017] RSP: 0018:ff71be0f40237c78 EFLAGS: 00010286
[   47.429077] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.429115] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2449e0c18ff100
[   47.429171] RBP: 0000000000000000 R08: ff2449e0c1daf550 R09: ff2449e0c19bf82c
[   47.429214] R10: ff2449e0c317e118 R11: fefefefefefefeff R12: 0000000000000000
[   47.429290] R13: 0000000000000011 R14: ff2449e0c317e000 R15: ff2449e0c18ff100
[   47.429336] FS:  0000000000000000(0000) GS:ff2449e173216000(0000) knlGS:0000000000000000
[   47.429379] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.429405] CR2: 00005598dd2902b8 CR3: 0000000003039002 CR4: 0000000000771ef0
[   47.429431] PKRU: 55555554
[   47.429439] Call Trace:
[   47.429454]  <TASK>
[   47.429496]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.429520]  default_device_exit_batch+0x318/0x390
[   47.429562]  ops_undo_list+0x10b/0x240
[   47.429579]  cleanup_net+0x1d7/0x2e0
[   47.429593]  process_one_work+0x162/0x360
[   47.429614]  worker_thread+0x16e/0x2d0
[   47.429627]  ? rescuer_thread+0x510/0x510
[   47.429643]  kthread+0xe1/0x120
[   47.429658]  ? kthread_park+0xa0/0xa0
[   47.429675]  ret_from_fork+0x16d/0x250
[   47.429688]  ? kthread_park+0xa0/0xa0
[   47.429701]  ret_from_fork_asm+0x11/0x20
[   47.429715]  </TASK>
[   47.429722] ---[ end trace 0000000000000000 ]---