[    2.228110] ------------[ cut here ]------------
[    2.228201] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/158
[    2.228294] Modules linked in:
[    2.228354] CPU: 2 UID: 0 PID: 158 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.228449] Tainted: [W]=WARN
[    2.228504] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.228574] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.228646] 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
[    2.228777] RSP: 0018:ff607241803c7cc8 EFLAGS: 00010286
[    2.228841] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.228918] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003105700
[    2.229000] RBP: 0000000000000000 R08: ff29a2600327fd90 R09: ff29a260032da02c
[    2.229079] R10: ff29a26002fdd118 R11: fefefefefefefeff R12: 0000000000000000
[    2.229156] R13: 0000000000000010 R14: ff29a26002fdd000 R15: ff29a26003105700
[    2.229239] FS:  00007f4029be4740(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[    2.229325] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.229401] CR2: 00005589e652c310 CR3: 0000000003091004 CR4: 0000000000771ef0
[    2.229482] PKRU: 55555554
[    2.229531] Call Trace:
[    2.229582]  <TASK>
[    2.229635]  rtmsg_ifinfo+0x3c/0xa0
[    2.229693]  register_netdevice+0x889/0x9f0
[    2.229751]  register_netdev+0x1e/0x30
[    2.229808]  loopback_net_init+0x57/0xb0
[    2.229869]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.229934]  ops_init+0x68/0x140
[    2.229999]  setup_net+0x85/0x150
[    2.230057]  copy_net_ns+0xf5/0x200
[    2.230115]  create_new_namespaces+0x117/0x2f0
[    2.230182]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.230248]  ksys_unshare+0x346/0x5e0
[    2.230308]  __x64_sys_unshare+0x12/0x20
[    2.230369]  do_syscall_64+0x104/0xfc0
[    2.230430]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.230495] RIP: 0033:0x7f4029cdfbcb
[    2.230553] 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
[    2.230695] RSP: 002b:00007fff18bf6ec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.230774] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4029cdfbcb
[    2.230851] RDX: 0000000000000000 RSI: 00007fff18bf6c30 RDI: 0000000040000000
[    2.230928] RBP: 00007fff18bf7250 R08: 00007fff18bf6e20 R09: 0000000000000000
[    2.231013] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.231095] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005589e652fb68
[    2.231177]  </TASK>
[    2.231226] ---[ end trace 0000000000000000 ]---
[    2.234889] ------------[ cut here ]------------
[    2.234980] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
[    2.235082] Modules linked in:
[    2.235143] CPU: 2 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.235247] Tainted: [W]=WARN
[    2.235310] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.235392] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.235464] 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
[    2.235638] RSP: 0018:ff607241803c7d68 EFLAGS: 00010286
[    2.235711] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.235787] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003105700
[    2.235865] RBP: 0000000000000000 R08: ff29a26003237e90 R09: ff29a260032df030
[    2.235944] R10: ff29a26003344118 R11: fefefefefefefeff R12: 0000000000000000
[    2.236032] R13: 0000000000000010 R14: ff29a26003344000 R15: ff29a26003105700
[    2.236114] FS:  000000002de5a400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[    2.236193] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.236264] CR2: 00007f0628ca9000 CR3: 0000000004e67005 CR4: 0000000000771ef0
[    2.236345] PKRU: 55555554
[    2.236395] Call Trace:
[    2.236445]  <TASK>
[    2.236493]  rtmsg_ifinfo+0x3c/0xa0
[    2.236550]  register_netdevice+0x889/0x9f0
[    2.236616]  __tun_chr_ioctl+0x83c/0x16c0
[    2.236676]  ? do_sys_openat2+0x9a/0xe0
[    2.236735]  __x64_sys_ioctl+0xa1/0xe0
[    2.236795]  do_syscall_64+0x104/0xfc0
[    2.236852]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.236916] RIP: 0033:0x47cc8d
[    2.236978] 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
[    2.237110] RSP: 002b:00007ffd760028c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.237189] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.237266] RDX: 00007ffd76002940 RSI: 00000000400454ca RDI: 0000000000000005
[    2.237346] RBP: 00007ffd76002910 R08: 0000000000000000 R09: 0000000000000000
[    2.237429] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd76002e18
[    2.237505] R13: 00007ffd76002e98 R14: 0000000000000002 R15: 0000000000543540
[    2.237583]  </TASK>
[    2.237637] ---[ end trace 0000000000000000 ]---
[    2.237723] ------------[ cut here ]------------
[    2.237784] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
[    2.237869] Modules linked in:
[    2.237932] CPU: 2 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.238036] Tainted: [W]=WARN
[    2.238091] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.238161] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.238228] 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
[    2.238354] RSP: 0018:ff607241803c7d60 EFLAGS: 00010286
[    2.238422] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.238506] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003105700
[    2.238585] RBP: 0000000000000002 R08: ff29a26003237e90 R09: ff29a260032df030
[    2.238670] R10: ff29a26003344118 R11: fefefefefefefeff R12: 0000000000000000
[    2.238746] R13: 0000000000000010 R14: ff29a26003344000 R15: ff29a26003105700
[    2.238825] FS:  000000002de5a400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[    2.238906] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.238983] CR2: 00007f0628ca9000 CR3: 0000000004e67005 CR4: 0000000000771ef0
[    2.239062] PKRU: 55555554
[    2.239113] Call Trace:
[    2.239163]  <TASK>
[    2.239215]  rtnetlink_event+0x6e/0xb0
[    2.239277]  notifier_call_chain+0x6d/0x100
[    2.239339]  netdev_update_features+0x56/0x60
[    2.239406]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.239464]  ? file_init_path+0x62/0x120
[    2.239528]  __x64_sys_ioctl+0xa1/0xe0
[    2.239586]  do_syscall_64+0x104/0xfc0
[    2.239655]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.239724] RIP: 0033:0x47cc8d
[    2.239780] 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
[    2.239907] RSP: 002b:00007ffd76002900 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.239995] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.240074] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.240151] RBP: 00007ffd76002950 R08: 0000000000000000 R09: 0000000000000000
[    2.240229] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd76002e18
[    2.240310] R13: 00007ffd76002e98 R14: 0000000000000002 R15: 0000000000543540
[    2.240391]  </TASK>
[    2.240440] ---[ end trace 0000000000000000 ]---
[    2.240523] ------------[ cut here ]------------
[    2.240585] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
[    2.240678] Modules linked in:
[    2.240734] CPU: 2 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.240827] Tainted: [W]=WARN
[    2.240883] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.240951] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.241021] 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
[    2.241153] RSP: 0018:ff607241803c7c10 EFLAGS: 00010286
[    2.241216] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.241292] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003105700
[    2.241373] RBP: 0000000000000000 R08: ff29a26003237e90 R09: ff29a260032dc030
[    2.241450] R10: ff29a26003344118 R11: fefefefefefefeff R12: 0000000000000000
[    2.241527] R13: 0000000000000010 R14: ff29a26003344000 R15: ff29a26003105700
[    2.241612] FS:  000000002de5a400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[    2.241692] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.241762] CR2: 00007f0628ca9000 CR3: 0000000004e67005 CR4: 0000000000771ef0
[    2.241840] PKRU: 55555554
[    2.241888] Call Trace:
[    2.241936]  <TASK>
[    2.241991]  rtmsg_ifinfo+0x3c/0xa0
[    2.242048]  __dev_notify_flags+0xb1/0xf0
[    2.242106]  netif_change_flags+0x54/0x70
[    2.242164]  dev_change_flags+0x45/0x80
[    2.242221]  devinet_ioctl+0x607/0x7f0
[    2.242280]  inet_ioctl+0x229/0x240
[    2.242338]  ? __rtnl_unlock+0x35/0x60
[    2.242396]  sock_do_ioctl+0x75/0x140
[    2.242455]  __x64_sys_ioctl+0xa1/0xe0
[    2.242513]  do_syscall_64+0x104/0xfc0
[    2.242570]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.242638] RIP: 0033:0x47cc8d
[    2.242695] 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
[    2.242825] RSP: 002b:00007ffd760028e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.242902] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.242985] RDX: 00007ffd76002950 RSI: 0000000000008914 RDI: 0000000000000006
[    2.243061] RBP: 00007ffd76002930 R08: 0000000000000000 R09: 0000000000000000
[    2.243140] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd76002e18
[    2.243216] R13: 00007ffd76002e98 R14: 0000000000000002 R15: 0000000000543540
[    2.243292]  </TASK>
[    2.243342] ---[ end trace 0000000000000000 ]---
[   47.204744] ------------[ cut here ]------------
[   47.204808] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/158
[   47.204876] Modules linked in:
[   47.204903] CPU: 3 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.204975] Tainted: [W]=WARN
[   47.205003] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.205043] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.205080] 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
[   47.205196] RSP: 0018:ff607241803c7b58 EFLAGS: 00010286
[   47.205228] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.205281] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003111700
[   47.205334] RBP: 0000000000000000 R08: ff29a26003237e90 R09: ff29a26001d83030
[   47.205384] R10: ff29a26003344118 R11: fefefefefefefeff R12: 0000000000000000
[   47.205441] R13: 0000000000000010 R14: ff29a26003344000 R15: ff29a26003111700
[   47.205491] FS:  0000000000000000(0000) GS:ff29a26083a16000(0000) knlGS:0000000000000000
[   47.205539] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.205580] CR2: 00007fb13b4746f0 CR3: 0000000002dcb004 CR4: 0000000000771ef0
[   47.205635] PKRU: 55555554
[   47.205654] Call Trace:
[   47.205671]  <TASK>
[   47.205688]  rtmsg_ifinfo+0x3c/0xa0
[   47.205718]  netif_close_many+0xed/0x190
[   47.205743]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.205776]  ? __queue_work+0x141/0x550
[   47.205806]  unregister_netdevice_queue+0x9e/0xd0
[   47.205840]  __tun_detach+0x591/0x5b0
[   47.205870]  tun_chr_close+0x3f/0xc0
[   47.205895]  __fput+0xe8/0x2c0
[   47.205926]  task_work_run+0x63/0xa0
[   47.205950]  do_exit+0x2c1/0xba0
[   47.205981]  ? netlink_unicast+0x273/0x3a0
[   47.206008]  do_group_exit+0x2d/0xc0
[   47.206035]  get_signal+0x82e/0x900
[   47.206064]  arch_do_signal_or_restart+0x77/0x2b0
[   47.206104]  exit_to_user_mode_loop+0x75/0x4a0
[   47.206140]  do_syscall_64+0x439/0xfc0
[   47.206168]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.206204] RIP: 0033:0x4c2d9e
[   47.206232] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.206278] RSP: 002b:00007ffd76002270 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.206329] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.206382] RDX: 0000000000000014 RSI: 00007ffd76002350 RDI: 0000000000000007
[   47.206435] RBP: 00007ffd76002280 R08: 00007ffd76002310 R09: 000000000000000c
[   47.206480] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd76002e18
[   47.206532] R13: 00007ffd76002e98 R14: 00007ffd76002440 R15: 0000000000543540
[   47.206585]  </TASK>
[   47.206601] ---[ end trace 0000000000000000 ]---
[   47.206832] ------------[ cut here ]------------
[   47.206871] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/158
[   47.206934] Modules linked in:
[   47.206958] CPU: 3 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.207030] Tainted: [W]=WARN
[   47.207054] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.207093] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.207127] 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
[   47.207237] RSP: 0018:ff607241803c7bc8 EFLAGS: 00010286
[   47.207271] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.207315] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003111700
[   47.207366] RBP: 0000000000000000 R08: ff29a26003237e90 R09: ff29a26004ebc030
[   47.207420] R10: ff29a26003344118 R11: fefefefefefefeff R12: 0000000000000000
[   47.207470] R13: 0000000000000011 R14: ff29a26003344000 R15: ff29a26003111700
[   47.207527] FS:  0000000000000000(0000) GS:ff29a26083a16000(0000) knlGS:0000000000000000
[   47.207582] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.207627] CR2: 00007fb13b66f620 CR3: 000000001a642005 CR4: 0000000000771ef0
[   47.207675] PKRU: 55555554
[   47.207690] Call Trace:
[   47.207706]  <TASK>
[   47.207725]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.207760]  unregister_netdevice_queue+0x9e/0xd0
[   47.207791]  __tun_detach+0x591/0x5b0
[   47.207819]  tun_chr_close+0x3f/0xc0
[   47.207842]  __fput+0xe8/0x2c0
[   47.207871]  task_work_run+0x63/0xa0
[   47.207898]  do_exit+0x2c1/0xba0
[   47.207924]  ? netlink_unicast+0x273/0x3a0
[   47.207950]  do_group_exit+0x2d/0xc0
[   47.207982]  get_signal+0x82e/0x900
[   47.208008]  arch_do_signal_or_restart+0x77/0x2b0
[   47.208042]  exit_to_user_mode_loop+0x75/0x4a0
[   47.208076]  do_syscall_64+0x439/0xfc0
[   47.208106]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.208140] RIP: 0033:0x4c2d9e
[   47.208166] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.208207] RSP: 002b:00007ffd76002270 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.208257] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.208305] RDX: 0000000000000014 RSI: 00007ffd76002350 RDI: 0000000000000007
[   47.208353] RBP: 00007ffd76002280 R08: 00007ffd76002310 R09: 000000000000000c
[   47.208404] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd76002e18
[   47.208454] R13: 00007ffd76002e98 R14: 00007ffd76002440 R15: 0000000000543540
[   47.208501]  </TASK>
[   47.208520] ---[ end trace 0000000000000000 ]---
[   47.214100] ------------[ cut here ]------------
[   47.214143] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:1/64
[   47.214211] Modules linked in:
[   47.214244] CPU: 3 UID: 0 PID: 64 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.214309] Tainted: [W]=WARN
[   47.214337] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.214376] Workqueue: netns cleanup_net
[   47.214402] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.214439] 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
[   47.214541] RSP: 0018:ff60724180237c78 EFLAGS: 00010286
[   47.214574] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.214622] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003111700
[   47.214674] RBP: 0000000000000000 R08: ff29a2600327fd90 R09: ff29a260032f702c
[   47.214723] R10: ff29a26002fdd118 R11: fefefefefefefeff R12: 0000000000000000
[   47.214769] R13: 0000000000000011 R14: ff29a26002fdd000 R15: ff29a26003111700
[   47.214822] FS:  0000000000000000(0000) GS:ff29a26083a16000(0000) knlGS:0000000000000000
[   47.214869] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.214913] CR2: 00007f90dfa00f98 CR3: 000000001a642005 CR4: 0000000000771ef0
[   47.214970] PKRU: 55555554
[   47.214986] Call Trace:
[   47.215003]  <TASK>
[   47.215020]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.215054]  default_device_exit_batch+0x318/0x390
[   47.215085]  ops_undo_list+0x10b/0x240
[   47.215112]  cleanup_net+0x1d7/0x2e0
[   47.215136]  process_one_work+0x162/0x360
[   47.215162]  worker_thread+0x16e/0x2d0
[   47.215190]  ? rescuer_thread+0x510/0x510
[   47.215214]  kthread+0xe1/0x120
[   47.215240]  ? kthread_park+0xa0/0xa0
[   47.215263]  ret_from_fork+0x16d/0x250
[   47.215290]  ? kthread_park+0xa0/0xa0
[   47.215315]  ret_from_fork_asm+0x11/0x20
[   47.215340]  </TASK>
[   47.215357] ---[ end trace 0000000000000000 ]---