[   93.139468] ------------[ cut here ]------------
[   93.139544] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/248
[   93.139625] Modules linked in:
[   93.139686] CPU: 2 UID: 0 PID: 248 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.139776] Tainted: [W]=WARN
[   93.139855] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.139931] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.139999] 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
[   93.140127] RSP: 0018:ff607241804d7cc8 EFLAGS: 00010286
[   93.140187] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.140265] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600182d100
[   93.140372] RBP: 0000000000000000 R08: ff29a26003114790 R09: ff29a260032dd02c
[   93.140446] R10: ff29a260032d9118 R11: fefefefefefefeff R12: 0000000000000000
[   93.140522] R13: 0000000000000010 R14: ff29a260032d9000 R15: ff29a2600182d100
[   93.140600] FS:  00007f475609d740(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[   93.140681] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.140750] CR2: 000055991762e008 CR3: 0000000004db8004 CR4: 0000000000771ef0
[   93.140824] PKRU: 55555554
[   93.140871] Call Trace:
[   93.140918]  <TASK>
[   93.140983]  rtmsg_ifinfo+0x3c/0xa0
[   93.141039]  register_netdevice+0x889/0x9f0
[   93.141094]  register_netdev+0x1e/0x30
[   93.141150]  loopback_net_init+0x57/0xb0
[   93.141248]  ? vsock_sysctl_init_net+0xb6/0x140
[   93.141317]  ops_init+0x68/0x140
[   93.141378]  setup_net+0x85/0x150
[   93.141434]  copy_net_ns+0xf5/0x200
[   93.141514]  create_new_namespaces+0x117/0x2f0
[   93.141577]  unshare_nsproxy_namespaces+0x85/0xb0
[   93.141639]  ksys_unshare+0x346/0x5e0
[   93.141699]  __x64_sys_unshare+0x12/0x20
[   93.141764]  do_syscall_64+0x104/0xfc0
[   93.141816]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.141877] RIP: 0033:0x7f4756198bcb
[   93.141931] 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
[   93.142071] RSP: 002b:00007fff276f39f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[   93.142144] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4756198bcb
[   93.142220] RDX: 0000000000000000 RSI: 00007fff276f3760 RDI: 0000000040000000
[   93.142294] RBP: 00007fff276f3d80 R08: 00007fff276f3950 R09: 0000000000000000
[   93.142371] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[   93.142446] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005598eaea1b68
[   93.142522]  </TASK>
[   93.142568] ---[ end trace 0000000000000000 ]---
[   93.143258] ------------[ cut here ]------------
[   93.143318] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/248
[   93.143403] Modules linked in:
[   93.143457] CPU: 2 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.143548] Tainted: [W]=WARN
[   93.143601] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.143680] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.143768] 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
[   93.143898] RSP: 0018:ff607241804d7d68 EFLAGS: 00010286
[   93.143959] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.144044] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600182d100
[   93.144115] RBP: 0000000000000000 R08: ff29a26002e6b810 R09: ff29a26006bea030
[   93.144212] R10: ff29a26004cfc118 R11: fefefefefefefeff R12: 0000000000000000
[   93.144308] R13: 0000000000000010 R14: ff29a26004cfc000 R15: ff29a2600182d100
[   93.144406] FS:  000000001ad06400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[   93.144497] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.144603] CR2: 00007f0f7fd0c000 CR3: 000000000320b005 CR4: 0000000000771ef0
[   93.144720] PKRU: 55555554
[   93.144775] Call Trace:
[   93.144834]  <TASK>
[   93.144880]  rtmsg_ifinfo+0x3c/0xa0
[   93.144952]  register_netdevice+0x889/0x9f0
[   93.145013]  __tun_chr_ioctl+0x83c/0x16c0
[   93.145070]  ? do_sys_openat2+0x9a/0xe0
[   93.145125]  __x64_sys_ioctl+0xa1/0xe0
[   93.145181]  do_syscall_64+0x104/0xfc0
[   93.145236]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.145298] RIP: 0033:0x47cc8d
[   93.145354] 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
[   93.145487] RSP: 002b:00007fff9b4d6660 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.145562] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.145636] RDX: 00007fff9b4d66e0 RSI: 00000000400454ca RDI: 0000000000000005
[   93.145720] RBP: 00007fff9b4d66b0 R08: 0000000000000000 R09: 0000000000000000
[   93.145794] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff9b4d6bb8
[   93.145868] R13: 00007fff9b4d6c38 R14: 0000000000000002 R15: 0000000000543540
[   93.145943]  </TASK>
[   93.145997] ---[ end trace 0000000000000000 ]---
[   93.146078] ------------[ cut here ]------------
[   93.146137] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/248
[   93.146220] Modules linked in:
[   93.146274] CPU: 2 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.146366] Tainted: [W]=WARN
[   93.146419] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.146486] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.146548] 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
[   93.146684] RSP: 0018:ff607241804d7d60 EFLAGS: 00010286
[   93.146746] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[   93.146820] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600182d100
[   93.146894] RBP: 0000000000000002 R08: ff29a26002e6b810 R09: ff29a26006bea030
[   93.146974] R10: ff29a26004cfc118 R11: fefefefefefefeff R12: 0000000000000000
[   93.147049] R13: 0000000000000010 R14: ff29a26004cfc000 R15: ff29a2600182d100
[   93.147128] FS:  000000001ad06400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[   93.147203] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.147271] CR2: 00007f0f7fd0c000 CR3: 000000000320b005 CR4: 0000000000771ef0
[   93.147348] PKRU: 55555554
[   93.147395] Call Trace:
[   93.147442]  <TASK>
[   93.147488]  rtnetlink_event+0x6e/0xb0
[   93.147543]  notifier_call_chain+0x6d/0x100
[   93.147598]  netdev_update_features+0x56/0x60
[   93.147666]  __tun_chr_ioctl+0xbf1/0x16c0
[   93.147722]  ? file_init_path+0x62/0x120
[   93.147777]  __x64_sys_ioctl+0xa1/0xe0
[   93.147832]  do_syscall_64+0x104/0xfc0
[   93.147887]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.147948] RIP: 0033:0x47cc8d
[   93.148005] 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
[   93.148137] RSP: 002b:00007fff9b4d66a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.148212] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.148288] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[   93.148366] RBP: 00007fff9b4d66f0 R08: 0000000000000005 R09: 0000000000001ff0
[   93.148440] R10: 0000000000000003 R11: 0000000000000246 R12: 00007fff9b4d6bb8
[   93.148515] R13: 00007fff9b4d6c38 R14: 0000000000000002 R15: 0000000000543540
[   93.148590]  </TASK>
[   93.148636] ---[ end trace 0000000000000000 ]---
[   93.148723] ------------[ cut here ]------------
[   93.148783] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/248
[   93.148865] Modules linked in:
[   93.148919] CPU: 2 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.149012] Tainted: [W]=WARN
[   93.149069] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.149137] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.149198] 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
[   93.149330] RSP: 0018:ff607241804d7c10 EFLAGS: 00010286
[   93.149392] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[   93.149469] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600182d100
[   93.149542] RBP: 0000000000000000 R08: ff29a26002e6b810 R09: ff29a26002d27030
[   93.149615] R10: ff29a26004cfc118 R11: fefefefefefefeff R12: 0000000000000000
[   93.149697] R13: 0000000000000010 R14: ff29a26004cfc000 R15: ff29a2600182d100
[   93.149774] FS:  000000001ad06400(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[   93.149850] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.149918] CR2: 00007f0f7fd0c000 CR3: 000000000320b005 CR4: 0000000000771ef0
[   93.149998] PKRU: 55555554
[   93.150044] Call Trace:
[   93.150090]  <TASK>
[   93.150137]  rtmsg_ifinfo+0x3c/0xa0
[   93.150192]  __dev_notify_flags+0xb1/0xf0
[   93.150247]  netif_change_flags+0x54/0x70
[   93.150302]  dev_change_flags+0x45/0x80
[   93.150358]  devinet_ioctl+0x607/0x7f0
[   93.150416]  inet_ioctl+0x229/0x240
[   93.150471]  ? __rtnl_unlock+0x35/0x60
[   93.150526]  sock_do_ioctl+0x75/0x140
[   93.150582]  __x64_sys_ioctl+0xa1/0xe0
[   93.150638]  do_syscall_64+0x104/0xfc0
[   93.150697]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.150758] RIP: 0033:0x47cc8d
[   93.150811] 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
[   93.150943] RSP: 002b:00007fff9b4d6680 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.151024] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.151100] RDX: 00007fff9b4d66f0 RSI: 0000000000008914 RDI: 0000000000000006
[   93.151175] RBP: 00007fff9b4d66d0 R08: 0000000000000005 R09: 0000000000001ff0
[   93.151249] R10: 0000000000000003 R11: 0000000000000246 R12: 00007fff9b4d6bb8
[   93.151322] R13: 00007fff9b4d6c38 R14: 0000000000000002 R15: 0000000000543540
[   93.151398]  </TASK>
[   93.151444] ---[ end trace 0000000000000000 ]---
[  138.126658] ------------[ cut here ]------------
[  138.126823] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/248
[  138.126923] Modules linked in:
[  138.126987] CPU: 2 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.127080] Tainted: [W]=WARN
[  138.127133] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.127202] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.127264] 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
[  138.127406] RSP: 0018:ff607241804d7b58 EFLAGS: 00010286
[  138.127468] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  138.127545] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a2600310ff00
[  138.127620] RBP: 0000000000000000 R08: ff29a26002e6b810 R09: ff29a26002d27030
[  138.127697] R10: ff29a26004cfc118 R11: fefefefefefefeff R12: 0000000000000000
[  138.127775] R13: 0000000000000010 R14: ff29a26004cfc000 R15: ff29a2600310ff00
[  138.127857] FS:  0000000000000000(0000) GS:ff29a26083996000(0000) knlGS:0000000000000000
[  138.127935] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.128204] CR2: 00007f0f7fd0c000 CR3: 000000001a642002 CR4: 0000000000771ef0
[  138.128289] PKRU: 55555554
[  138.128336] Call Trace:
[  138.128394]  <TASK>
[  138.128442]  rtmsg_ifinfo+0x3c/0xa0
[  138.128497]  netif_close_many+0xed/0x190
[  138.128554]  unregister_netdevice_many_notify+0x267/0x9d0
[  138.128618]  ? __queue_work+0x141/0x550
[  138.128676]  unregister_netdevice_queue+0x9e/0xd0
[  138.128737]  __tun_detach+0x591/0x5b0
[  138.128795]  tun_chr_close+0x3f/0xc0
[  138.128851]  __fput+0xe8/0x2c0
[  138.128909]  task_work_run+0x63/0xa0
[  138.128973]  do_exit+0x2c1/0xba0
[  138.129030]  do_group_exit+0x2d/0xc0
[  138.129088]  get_signal+0x82e/0x900
[  138.129145]  ? __d_alloc+0x40/0x200
[  138.129202]  ? alloc_empty_file+0x3f/0xd0
[  138.129257]  arch_do_signal_or_restart+0x77/0x2b0
[  138.129322]  ? alloc_file_pseudo+0xc1/0x110
[  138.129387]  ? __sys_socket+0xda/0x130
[  138.129445]  exit_to_user_mode_loop+0x75/0x4a0
[  138.129511]  do_syscall_64+0x439/0xfc0
[  138.129569]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.129634] RIP: 0033:0x47ea2b
[  138.129688] Code: Unable to access opcode bytes at 0x47ea01.
[  138.129757] RSP: 002b:00007fff9b4d6108 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  138.129834] RAX: 0000000000000007 RBX: 00007fff9b4d61e0 RCX: 000000000047ea2b
[  138.129913] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  138.129993] RBP: 00007fff9b4d6140 R08: 0000000000000041 R09: 000000001ad073e0
[  138.130071] R10: 0000000000000040 R11: 0000000000000202 R12: 00007fff9b4d6bb8
[  138.130149] R13: 00007fff9b4d6c38 R14: 00007fff9b4d66b8 R15: 0000000000543540
[  138.130226]  </TASK>
[  138.130274] ---[ end trace 0000000000000000 ]---
[  138.130426] ------------[ cut here ]------------
[  138.130462] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/248
[  138.130515] Modules linked in:
[  138.130535] CPU: 0 UID: 0 PID: 248 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.130593] Tainted: [W]=WARN
[  138.130616] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.130651] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.130678] 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
[  138.130785] RSP: 0018:ff607241804d7bc8 EFLAGS: 00010286
[  138.130817] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.130864] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003080700
[  138.130904] RBP: 0000000000000000 R08: ff29a26002e6b810 R09: ff29a26006a48030
[  138.130949] R10: ff29a26004cfc118 R11: fefefefefefefeff R12: 0000000000000000
[  138.130988] R13: 0000000000000011 R14: ff29a26004cfc000 R15: ff29a26003080700
[  138.131032] FS:  0000000000000000(0000) GS:ff29a26083896000(0000) knlGS:0000000000000000
[  138.131083] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.131120] CR2: 00007f0a27852620 CR3: 000000001a642006 CR4: 0000000000771ef0
[  138.131167] PKRU: 55555554
[  138.131180] Call Trace:
[  138.131194]  <TASK>
[  138.131210]  unregister_netdevice_many_notify+0x877/0x9d0
[  138.131241]  unregister_netdevice_queue+0x9e/0xd0
[  138.131272]  __tun_detach+0x591/0x5b0
[  138.131295]  tun_chr_close+0x3f/0xc0
[  138.131317]  __fput+0xe8/0x2c0
[  138.131339]  task_work_run+0x63/0xa0
[  138.131367]  do_exit+0x2c1/0xba0
[  138.131393]  do_group_exit+0x2d/0xc0
[  138.131419]  get_signal+0x82e/0x900
[  138.131438]  ? __d_alloc+0x40/0x200
[  138.131460]  ? alloc_empty_file+0x3f/0xd0
[  138.131485]  arch_do_signal_or_restart+0x77/0x2b0
[  138.131512]  ? alloc_file_pseudo+0xc1/0x110
[  138.131533]  ? __sys_socket+0xda/0x130
[  138.131553]  exit_to_user_mode_loop+0x75/0x4a0
[  138.131582]  do_syscall_64+0x439/0xfc0
[  138.131607]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.131636] RIP: 0033:0x47ea2b
[  138.131659] Code: Unable to access opcode bytes at 0x47ea01.
[  138.131695] RSP: 002b:00007fff9b4d6108 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  138.131740] RAX: 0000000000000007 RBX: 00007fff9b4d61e0 RCX: 000000000047ea2b
[  138.131791] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  138.131838] RBP: 00007fff9b4d6140 R08: 0000000000000041 R09: 000000001ad073e0
[  138.131873] R10: 0000000000000040 R11: 0000000000000202 R12: 00007fff9b4d6bb8
[  138.131917] R13: 00007fff9b4d6c38 R14: 00007fff9b4d66b8 R15: 0000000000543540
[  138.131963]  </TASK>
[  138.131981] ---[ end trace 0000000000000000 ]---
[  138.140082] ------------[ cut here ]------------
[  138.140115] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:1/64
[  138.140178] Modules linked in:
[  138.140204] CPU: 3 UID: 0 PID: 64 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.140265] Tainted: [W]=WARN
[  138.140288] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.140327] Workqueue: netns cleanup_net
[  138.140354] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.140387] 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
[  138.140480] RSP: 0018:ff60724180237c78 EFLAGS: 00010286
[  138.140507] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.140548] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff29a26003107000
[  138.140590] RBP: 0000000000000000 R08: ff29a26003114790 R09: ff29a26004ef082c
[  138.140631] R10: ff29a260032d9118 R11: fefefefefefefeff R12: 0000000000000000
[  138.140677] R13: 0000000000000011 R14: ff29a260032d9000 R15: ff29a26003107000
[  138.140727] FS:  0000000000000000(0000) GS:ff29a26083a16000(0000) knlGS:0000000000000000
[  138.140772] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.140810] CR2: 00007f67999c7680 CR3: 000000001a642004 CR4: 0000000000771ef0
[  138.140851] PKRU: 55555554
[  138.140865] Call Trace:
[  138.140879]  <TASK>
[  138.140895]  unregister_netdevice_many_notify+0x877/0x9d0
[  138.140924]  default_device_exit_batch+0x318/0x390
[  138.140953]  ops_undo_list+0x10b/0x240
[  138.140978]  cleanup_net+0x1d7/0x2e0
[  138.141003]  process_one_work+0x162/0x360
[  138.141027]  worker_thread+0x16e/0x2d0
[  138.141053]  ? rescuer_thread+0x510/0x510
[  138.141076]  kthread+0xe1/0x120
[  138.141099]  ? kthread_park+0xa0/0xa0
[  138.141122]  ret_from_fork+0x16d/0x250
[  138.141145]  ? kthread_park+0xa0/0xa0
[  138.141168]  ret_from_fork_asm+0x11/0x20
[  138.141192]  </TASK>
[  138.141205] ---[ end trace 0000000000000000 ]---