[    2.262781] ------------[ cut here ]------------
[    2.262823] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/159
[    2.262880] Modules linked in:
[    2.262906] CPU: 3 UID: 0 PID: 159 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.262962] Tainted: [W]=WARN
[    2.262984] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.263019] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.263049] 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
[    2.263147] RSP: 0018:ff8736c2803dfcc8 EFLAGS: 00010286
[    2.263176] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.263219] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4417630303c300
[    2.263262] RBP: 0000000000000000 R08: ff44176301808250 R09: ff4417630478202c
[    2.263310] R10: ff441763019bd118 R11: fefefefefefefeff R12: 0000000000000000
[    2.263355] R13: 0000000000000010 R14: ff441763019bd000 R15: ff4417630303c300
[    2.263397] FS:  00007fd1ca13e740(0000) GS:ff441763a8016000(0000) knlGS:0000000000000000
[    2.263435] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.263467] CR2: 00005559f8bbe310 CR3: 0000000004660006 CR4: 0000000000771ef0
[    2.263511] PKRU: 55555554
[    2.263526] Call Trace:
[    2.263543]  <TASK>
[    2.263556]  rtmsg_ifinfo+0x3c/0xa0
[    2.263575]  register_netdevice+0x889/0x9f0
[    2.263598]  register_netdev+0x1e/0x30
[    2.263621]  loopback_net_init+0x57/0xb0
[    2.263647]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.263672]  ops_init+0x68/0x140
[    2.263697]  setup_net+0x85/0x150
[    2.263726]  copy_net_ns+0xf5/0x200
[    2.263749]  create_new_namespaces+0x117/0x2f0
[    2.263778]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.263805]  ksys_unshare+0x346/0x5e0
[    2.263828]  __x64_sys_unshare+0x12/0x20
[    2.263848]  do_syscall_64+0x104/0xfc0
[    2.263871]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.263895] RIP: 0033:0x7fd1ca239bcb
[    2.263917] 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
[    2.264012] RSP: 002b:00007ffc1eb5c088 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.264056] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd1ca239bcb
[    2.264097] RDX: 0000000000000000 RSI: 00007ffc1eb5bdf0 RDI: 0000000040000000
[    2.264140] RBP: 00007ffc1eb5c410 R08: 00007ffc1eb5bfe0 R09: 0000000000000000
[    2.264181] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.264229] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005559f8bc1b68
[    2.264274]  </TASK>
[    2.264290] ---[ end trace 0000000000000000 ]---
[    2.267173] ------------[ cut here ]------------
[    2.267203] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.267258] Modules linked in:
[    2.267280] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.267338] Tainted: [W]=WARN
[    2.267360] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.267393] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.267420] 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
[    2.267501] RSP: 0018:ff8736c2803dfd68 EFLAGS: 00010286
[    2.267529] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.267569] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4417630303c300
[    2.267608] RBP: 0000000000000000 R08: ff44176302e10a50 R09: ff44176304787030
[    2.267648] R10: ff44176304690118 R11: fefefefefefefeff R12: 0000000000000000
[    2.267686] R13: 0000000000000010 R14: ff44176304690000 R15: ff4417630303c300
[    2.267736] FS:  0000000023101400(0000) GS:ff441763a8016000(0000) knlGS:0000000000000000
[    2.267785] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.267822] CR2: 00007fe6750d3000 CR3: 00000000046db001 CR4: 0000000000771ef0
[    2.267867] PKRU: 55555554
[    2.267881] Call Trace:
[    2.267896]  <TASK>
[    2.267910]  rtmsg_ifinfo+0x3c/0xa0
[    2.267928]  register_netdevice+0x889/0x9f0
[    2.267949]  __tun_chr_ioctl+0x83c/0x16c0
[    2.267975]  ? do_sys_openat2+0x9a/0xe0
[    2.267996]  __x64_sys_ioctl+0xa1/0xe0
[    2.268016]  do_syscall_64+0x104/0xfc0
[    2.268037]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.268064] RIP: 0033:0x47cc8d
[    2.268085] 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
[    2.268173] RSP: 002b:00007ffdb47092b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.268213] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.268245] RDX: 00007ffdb4709330 RSI: 00000000400454ca RDI: 0000000000000005
[    2.268281] RBP: 00007ffdb4709300 R08: 0000000000000000 R09: 0000000000000000
[    2.268327] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdb4709808
[    2.268369] R13: 00007ffdb4709888 R14: 0000000000000002 R15: 0000000000543540
[    2.268404]  </TASK>
[    2.268417] ---[ end trace 0000000000000000 ]---
[    2.268450] ------------[ cut here ]------------
[    2.268478] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.268526] Modules linked in:
[    2.268545] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.268597] Tainted: [W]=WARN
[    2.268613] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.268658] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.268689] 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
[    2.268784] RSP: 0018:ff8736c2803dfd60 EFLAGS: 00010286
[    2.268808] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.268843] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4417630303c300
[    2.268883] RBP: 0000000000000002 R08: ff44176302e10a50 R09: ff44176304787030
[    2.268921] R10: ff44176304690118 R11: fefefefefefefeff R12: 0000000000000000
[    2.268960] R13: 0000000000000010 R14: ff44176304690000 R15: ff4417630303c300
[    2.269001] FS:  0000000023101400(0000) GS:ff441763a8016000(0000) knlGS:0000000000000000
[    2.269040] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.269073] CR2: 00007fe6750d3000 CR3: 00000000046db001 CR4: 0000000000771ef0
[    2.269113] PKRU: 55555554
[    2.269128] Call Trace:
[    2.269141]  <TASK>
[    2.269156]  rtnetlink_event+0x6e/0xb0
[    2.269177]  notifier_call_chain+0x6d/0x100
[    2.269196]  netdev_update_features+0x56/0x60
[    2.269226]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.269251]  ? file_init_path+0x62/0x120
[    2.269275]  __x64_sys_ioctl+0xa1/0xe0
[    2.269296]  do_syscall_64+0x104/0xfc0
[    2.269317]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.269341] RIP: 0033:0x47cc8d
[    2.269361] 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
[    2.269462] RSP: 002b:00007ffdb47092f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.269497] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.269539] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.269577] RBP: 00007ffdb4709340 R08: 0000000000000000 R09: 0000000000000000
[    2.269614] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdb4709808
[    2.269654] R13: 00007ffdb4709888 R14: 0000000000000002 R15: 0000000000543540
[    2.269696]  </TASK>
[    2.269713] ---[ end trace 0000000000000000 ]---
[    2.269756] ------------[ cut here ]------------
[    2.269778] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.269819] Modules linked in:
[    2.269846] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.269896] Tainted: [W]=WARN
[    2.269915] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.269948] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.269977] 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
[    2.270069] RSP: 0018:ff8736c2803dfc10 EFLAGS: 00010286
[    2.270098] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.270143] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4417630303c300
[    2.270191] RBP: 0000000000000000 R08: ff44176302e10a50 R09: ff44176304784030
[    2.270236] R10: ff44176304690118 R11: fefefefefefefeff R12: 0000000000000000
[    2.270282] R13: 0000000000000010 R14: ff44176304690000 R15: ff4417630303c300
[    2.270322] FS:  0000000023101400(0000) GS:ff441763a8016000(0000) knlGS:0000000000000000
[    2.270367] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.270397] CR2: 00007fe6750d3000 CR3: 00000000046db001 CR4: 0000000000771ef0
[    2.270436] PKRU: 55555554
[    2.270450] Call Trace:
[    2.270462]  <TASK>
[    2.270476]  rtmsg_ifinfo+0x3c/0xa0
[    2.270498]  __dev_notify_flags+0xb1/0xf0
[    2.270519]  netif_change_flags+0x54/0x70
[    2.270540]  dev_change_flags+0x45/0x80
[    2.270561]  devinet_ioctl+0x607/0x7f0
[    2.270585]  inet_ioctl+0x229/0x240
[    2.270603]  ? __rtnl_unlock+0x35/0x60
[    2.270626]  sock_do_ioctl+0x75/0x140
[    2.270649]  __x64_sys_ioctl+0xa1/0xe0
[    2.270668]  do_syscall_64+0x104/0xfc0
[    2.270689]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.270714] RIP: 0033:0x47cc8d
[    2.270738] 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
[    2.270834] RSP: 002b:00007ffdb47092d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.270877] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.270916] RDX: 00007ffdb4709340 RSI: 0000000000008914 RDI: 0000000000000006
[    2.270956] RBP: 00007ffdb4709320 R08: 0000000000000000 R09: 0000000000000000
[    2.270992] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdb4709808
[    2.271030] R13: 00007ffdb4709888 R14: 0000000000000002 R15: 0000000000543540
[    2.271071]  </TASK>
[    2.271082] ---[ end trace 0000000000000000 ]---
[   47.248927] ------------[ cut here ]------------
[   47.249036] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.249100] Modules linked in:
[   47.249127] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.249192] Tainted: [W]=WARN
[   47.249216] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.249256] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.249287] 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
[   47.249400] RSP: 0018:ff8736c2803dfb58 EFLAGS: 00010286
[   47.249431] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.249483] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff4417630303c500
[   47.249524] RBP: 0000000000000000 R08: ff44176302e10a50 R09: ff44176304784030
[   47.249565] R10: ff44176304690118 R11: fefefefefefefeff R12: 0000000000000000
[   47.249606] R13: 0000000000000010 R14: ff44176304690000 R15: ff4417630303c500
[   47.249655] FS:  0000000000000000(0000) GS:ff441763a8016000(0000) knlGS:0000000000000000
[   47.249700] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.249894] CR2: 00007fe6750d3000 CR3: 0000000008042004 CR4: 0000000000771ef0
[   47.249955] PKRU: 55555554
[   47.249969] Call Trace:
[   47.249990]  <TASK>
[   47.250009]  rtmsg_ifinfo+0x3c/0xa0
[   47.250037]  netif_close_many+0xed/0x190
[   47.250063]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.250097]  ? __queue_work+0x141/0x550
[   47.250125]  unregister_netdevice_queue+0x9e/0xd0
[   47.250153]  __tun_detach+0x591/0x5b0
[   47.250176]  tun_chr_close+0x3f/0xc0
[   47.250203]  __fput+0xe8/0x2c0
[   47.250227]  task_work_run+0x63/0xa0
[   47.250251]  do_exit+0x2c1/0xba0
[   47.250282]  ? __x64_sys_close+0x47/0xa0
[   47.250308]  do_group_exit+0x2d/0xc0
[   47.250334]  get_signal+0x82e/0x900
[   47.250356]  ? fsnotify_grab_connector+0x4a/0x90
[   47.250390]  arch_do_signal_or_restart+0x77/0x2b0
[   47.250421]  ? __call_rcu_common.constprop.0+0x9a/0x340
[   47.250453]  ? __fput+0x17f/0x2c0
[   47.250472]  exit_to_user_mode_loop+0x75/0x4a0
[   47.250504]  do_syscall_64+0x439/0xfc0
[   47.250532]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.250561] RIP: 0033:0x47fb83
[   47.250588] Code: Unable to access opcode bytes at 0x47fb59.
[   47.250626] RSP: 002b:00007ffdb4708da0 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   47.250668] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[   47.250714] RDX: 000000000000000e RSI: 7fd40fe25aed9fbe RDI: 0000000000000007
[   47.250759] RBP: 00007ffdb47092a0 R08: 0000000000000041 R09: 00000000231023e0
[   47.250801] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[   47.250843] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[   47.250888]  </TASK>
[   47.250906] ---[ end trace 0000000000000000 ]---
[   47.251018] ------------[ cut here ]------------
[   47.251057] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
[   47.251119] Modules linked in:
[   47.251148] CPU: 0 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.251202] Tainted: [W]=WARN
[   47.251222] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.251259] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.251290] 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
[   47.251378] RSP: 0018:ff8736c2803dfbc8 EFLAGS: 00010286
[   47.251406] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.251447] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff44176302ff4f00
[   47.251492] RBP: 0000000000000000 R08: ff44176302e10a50 R09: ff441763019b0830
[   47.251538] R10: ff44176304690118 R11: fefefefefefefeff R12: 0000000000000000
[   47.251576] R13: 0000000000000011 R14: ff44176304690000 R15: ff44176302ff4f00
[   47.251618] FS:  0000000000000000(0000) GS:ff441763a7e96000(0000) knlGS:0000000000000000
[   47.251658] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.251696] CR2: 00007f8ab2f40f98 CR3: 0000000008042004 CR4: 0000000000771ef0
[   47.251748] PKRU: 55555554
[   47.251763] Call Trace:
[   47.251779]  <TASK>
[   47.251793]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.251823]  unregister_netdevice_queue+0x9e/0xd0
[   47.251853]  __tun_detach+0x591/0x5b0
[   47.251877]  tun_chr_close+0x3f/0xc0
[   47.251901]  __fput+0xe8/0x2c0
[   47.251921]  task_work_run+0x63/0xa0
[   47.251942]  do_exit+0x2c1/0xba0
[   47.251964]  ? __x64_sys_close+0x47/0xa0
[   47.251986]  do_group_exit+0x2d/0xc0
[   47.252006]  get_signal+0x82e/0x900
[   47.252027]  ? fsnotify_grab_connector+0x4a/0x90
[   47.252054]  arch_do_signal_or_restart+0x77/0x2b0
[   47.252083]  ? __call_rcu_common.constprop.0+0x9a/0x340
[   47.252111]  ? __fput+0x17f/0x2c0
[   47.252132]  exit_to_user_mode_loop+0x75/0x4a0
[   47.252160]  do_syscall_64+0x439/0xfc0
[   47.252184]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.252214] RIP: 0033:0x47fb83
[   47.252237] Code: Unable to access opcode bytes at 0x47fb59.
[   47.252272] RSP: 002b:00007ffdb4708da0 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[   47.252316] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[   47.252359] RDX: 000000000000000e RSI: 7fd40fe25aed9fbe RDI: 0000000000000007
[   47.252398] RBP: 00007ffdb47092a0 R08: 0000000000000041 R09: 00000000231023e0
[   47.252439] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[   47.252476] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[   47.252519]  </TASK>
[   47.252533] ---[ end trace 0000000000000000 ]---
[   47.259790] ------------[ cut here ]------------
[   47.259825] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:0/12
[   47.259893] Modules linked in:
[   47.259914] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.259972] Tainted: [W]=WARN
[   47.259993] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.260030] Workqueue: netns cleanup_net
[   47.260055] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.260087] 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
[   47.260183] RSP: 0018:ff8736c280067c78 EFLAGS: 00010286
[   47.260210] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.260247] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff44176302ff4f00
[   47.260289] RBP: 0000000000000000 R08: ff44176301808250 R09: ff4417630477d02c
[   47.260329] R10: ff441763019bd118 R11: fefefefefefefeff R12: 0000000000000000
[   47.260371] R13: 0000000000000011 R14: ff441763019bd000 R15: ff44176302ff4f00
[   47.260415] FS:  0000000000000000(0000) GS:ff441763a7e96000(0000) knlGS:0000000000000000
[   47.260460] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.260493] CR2: 00005564419b72b8 CR3: 0000000004556001 CR4: 0000000000771ef0
[   47.260532] PKRU: 55555554
[   47.260549] Call Trace:
[   47.260564]  <TASK>
[   47.260579]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.260609]  default_device_exit_batch+0x318/0x390
[   47.260636]  ops_undo_list+0x10b/0x240
[   47.260657]  cleanup_net+0x1d7/0x2e0
[   47.260677]  process_one_work+0x162/0x360
[   47.260707]  worker_thread+0x16e/0x2d0
[   47.260736]  ? rescuer_thread+0x510/0x510
[   47.260759]  kthread+0xe1/0x120
[   47.260783]  ? kthread_park+0xa0/0xa0
[   47.260806]  ret_from_fork+0x16d/0x250
[   47.260829]  ? kthread_park+0xa0/0xa0
[   47.260851]  ret_from_fork_asm+0x11/0x20
[   47.260878]  </TASK>
[   47.260893] ---[ end trace 0000000000000000 ]---