[    2.308255] ------------[ cut here ]------------
[    2.308357] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/159
[    2.308508] Modules linked in:
[    2.308585] CPU: 2 UID: 0 PID: 159 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.308697] Tainted: [W]=WARN
[    2.308751] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.308826] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.308902] 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
[    2.309067] RSP: 0018:ff5a04814038fcc8 EFLAGS: 00010286
[    2.309132] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.309212] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e400
[    2.309317] RBP: 0000000000000000 R08: ff28aa96432d3590 R09: ff28aa9643d1202c
[    2.309416] R10: ff28aa964321d118 R11: fefefefefefefeff R12: 0000000000000000
[    2.309529] R13: 0000000000000010 R14: ff28aa964321d000 R15: ff28aa964306e400
[    2.309639] FS:  00007f060495b740(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[    2.309733] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.309825] CR2: 000055b4513a9310 CR3: 0000000002fd2004 CR4: 0000000000771ef0
[    2.309907] PKRU: 55555554
[    2.309957] Call Trace:
[    2.310016]  <TASK>
[    2.310084]  rtmsg_ifinfo+0x3c/0xa0
[    2.310145]  register_netdevice+0x889/0x9f0
[    2.310209]  register_netdev+0x1e/0x30
[    2.310273]  loopback_net_init+0x57/0xb0
[    2.310336]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.310413]  ops_init+0x68/0x140
[    2.310485]  setup_net+0x85/0x150
[    2.310553]  copy_net_ns+0xf5/0x200
[    2.310621]  create_new_namespaces+0x117/0x2f0
[    2.310691]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.310760]  ksys_unshare+0x346/0x5e0
[    2.310826]  __x64_sys_unshare+0x12/0x20
[    2.310889]  do_syscall_64+0x104/0xfc0
[    2.310954]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.311021] RIP: 0033:0x7f0604a56bcb
[    2.311081] 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
[    2.311208] RSP: 002b:00007ffc08c40098 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.311293] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0604a56bcb
[    2.311371] RDX: 0000000000000000 RSI: 00007ffc08c3fe00 RDI: 0000000040000000
[    2.311455] RBP: 00007ffc08c40420 R08: 00007ffc08c3fff0 R09: 0000000000000000
[    2.311537] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.311619] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055b4513acb68
[    2.311697]  </TASK>
[    2.311749] ---[ end trace 0000000000000000 ]---
[    2.315018] ------------[ cut here ]------------
[    2.315084] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.315164] Modules linked in:
[    2.315226] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.315330] Tainted: [W]=WARN
[    2.315390] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.315470] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.315539] 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
[    2.315668] RSP: 0018:ff5a04814038fd68 EFLAGS: 00010286
[    2.315732] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.315812] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e400
[    2.315891] RBP: 0000000000000000 R08: ff28aa96432d3210 R09: ff28aa9643d17030
[    2.315967] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.316045] R13: 0000000000000010 R14: ff28aa9643e9c000 R15: ff28aa964306e400
[    2.316127] FS:  000000003da4e400(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[    2.316205] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.316288] CR2: 00007fe17d242000 CR3: 000000000259b005 CR4: 0000000000771ef0
[    2.316369] PKRU: 55555554
[    2.316420] Call Trace:
[    2.316479]  <TASK>
[    2.316530]  rtmsg_ifinfo+0x3c/0xa0
[    2.316592]  register_netdevice+0x889/0x9f0
[    2.316653]  __tun_chr_ioctl+0x83c/0x16c0
[    2.316718]  ? do_sys_openat2+0x9a/0xe0
[    2.316782]  __x64_sys_ioctl+0xa1/0xe0
[    2.316847]  do_syscall_64+0x104/0xfc0
[    2.316911]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.316980] RIP: 0033:0x47cc8d
[    2.317042] 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
[    2.317171] RSP: 002b:00007ffe3387e4d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.317259] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.317337] RDX: 00007ffe3387e550 RSI: 00000000400454ca RDI: 0000000000000005
[    2.317416] RBP: 00007ffe3387e520 R08: 0000000000000000 R09: 0000000000000000
[    2.317496] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3387ea28
[    2.317574] R13: 00007ffe3387eaa8 R14: 0000000000000002 R15: 0000000000543540
[    2.317653]  </TASK>
[    2.317701] ---[ end trace 0000000000000000 ]---
[    2.317790] ------------[ cut here ]------------
[    2.317867] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.317953] Modules linked in:
[    2.318016] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.318108] Tainted: [W]=WARN
[    2.318168] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.318247] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.318319] 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
[    2.318455] RSP: 0018:ff5a04814038fd60 EFLAGS: 00010286
[    2.318522] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.318603] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e400
[    2.318681] RBP: 0000000000000002 R08: ff28aa96432d3210 R09: ff28aa9643d17030
[    2.318761] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.318841] R13: 0000000000000010 R14: ff28aa9643e9c000 R15: ff28aa964306e400
[    2.318927] FS:  000000003da4e400(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[    2.319008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.319083] CR2: 00007fe17d242000 CR3: 000000000259b005 CR4: 0000000000771ef0
[    2.319161] PKRU: 55555554
[    2.319213] Call Trace:
[    2.319267]  <TASK>
[    2.319319]  rtnetlink_event+0x6e/0xb0
[    2.319382]  notifier_call_chain+0x6d/0x100
[    2.319452]  netdev_update_features+0x56/0x60
[    2.319517]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.319581]  ? file_init_path+0x62/0x120
[    2.319647]  __x64_sys_ioctl+0xa1/0xe0
[    2.319712]  do_syscall_64+0x104/0xfc0
[    2.319775]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.319845] RIP: 0033:0x47cc8d
[    2.319907] 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
[    2.320031] RSP: 002b:00007ffe3387e510 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.320110] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.320189] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.320278] RBP: 00007ffe3387e560 R08: 0000000000000005 R09: 0000000000001ff0
[    2.320360] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffe3387ea28
[    2.320452] R13: 00007ffe3387eaa8 R14: 0000000000000002 R15: 0000000000543540
[    2.320534]  </TASK>
[    2.320586] ---[ end trace 0000000000000000 ]---
[    2.320675] ------------[ cut here ]------------
[    2.320742] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.320833] Modules linked in:
[    2.320896] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.320989] Tainted: [W]=WARN
[    2.321050] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.321125] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.321192] 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
[    2.321327] RSP: 0018:ff5a04814038fc10 EFLAGS: 00010286
[    2.321396] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.321482] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e400
[    2.321563] RBP: 0000000000000000 R08: ff28aa96432d3210 R09: ff28aa9643d14030
[    2.321643] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[    2.321723] R13: 0000000000000010 R14: ff28aa9643e9c000 R15: ff28aa964306e400
[    2.321804] FS:  000000003da4e400(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[    2.321880] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.321952] CR2: 00007fe17d242000 CR3: 000000000259b005 CR4: 0000000000771ef0
[    2.322034] PKRU: 55555554
[    2.322082] Call Trace:
[    2.322134]  <TASK>
[    2.322187]  rtmsg_ifinfo+0x3c/0xa0
[    2.322255]  __dev_notify_flags+0xb1/0xf0
[    2.322318]  netif_change_flags+0x54/0x70
[    2.322382]  dev_change_flags+0x45/0x80
[    2.322451]  devinet_ioctl+0x607/0x7f0
[    2.322517]  inet_ioctl+0x229/0x240
[    2.322580]  ? __rtnl_unlock+0x35/0x60
[    2.322642]  sock_do_ioctl+0x75/0x140
[    2.322707]  __x64_sys_ioctl+0xa1/0xe0
[    2.322768]  do_syscall_64+0x104/0xfc0
[    2.322832]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.322902] RIP: 0033:0x47cc8d
[    2.322964] 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
[    2.323089] RSP: 002b:00007ffe3387e4f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.323168] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.323252] RDX: 00007ffe3387e560 RSI: 0000000000008914 RDI: 0000000000000006
[    2.323331] RBP: 00007ffe3387e540 R08: 0000000000000005 R09: 0000000000001ff0
[    2.323409] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffe3387ea28
[    2.323495] R13: 00007ffe3387eaa8 R14: 0000000000000002 R15: 0000000000543540
[    2.323575]  </TASK>
[    2.323626] ---[ end trace 0000000000000000 ]---
[   47.290272] ------------[ cut here ]------------
[   47.290422] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[   47.290648] Modules linked in:
[   47.290707] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.290813] Tainted: [W]=WARN
[   47.290869] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.290941] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.291005] 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
[   47.291148] RSP: 0018:ff5a04814038fb58 EFLAGS: 00010286
[   47.291211] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.291290] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa9643070100
[   47.291367] RBP: 0000000000000000 R08: ff28aa96432d3210 R09: ff28aa9643d14030
[   47.291453] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.291528] R13: 0000000000000010 R14: ff28aa9643e9c000 R15: ff28aa9643070100
[   47.291610] FS:  0000000000000000(0000) GS:ff28aa96f4796000(0000) knlGS:0000000000000000
[   47.291691] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.291762] CR2: 00007fe17d242000 CR3: 0000000002599006 CR4: 0000000000771ef0
[   47.291844] PKRU: 55555554
[   47.291893] Call Trace:
[   47.291943]  <TASK>
[   47.291993]  rtmsg_ifinfo+0x3c/0xa0
[   47.292051]  netif_close_many+0xed/0x190
[   47.292110]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.292175]  ? __queue_work+0x141/0x550
[   47.292235]  unregister_netdevice_queue+0x9e/0xd0
[   47.292300]  __tun_detach+0x591/0x5b0
[   47.292362]  tun_chr_close+0x3f/0xc0
[   47.292431]  __fput+0xe8/0x2c0
[   47.292491]  task_work_run+0x63/0xa0
[   47.292549]  do_exit+0x2c1/0xba0
[   47.292607]  do_group_exit+0x2d/0xc0
[   47.292667]  get_signal+0x82e/0x900
[   47.292726]  arch_do_signal_or_restart+0x77/0x2b0
[   47.292792]  exit_to_user_mode_loop+0x75/0x4a0
[   47.292858]  do_syscall_64+0x439/0xfc0
[   47.292918]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.292982] RIP: 0033:0x4c2d9e
[   47.293039] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.293107] RSP: 002b:00007ffe3387de80 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.293187] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.293262] RDX: 0000000000000014 RSI: 00007ffe3387df60 RDI: 0000000000000007
[   47.293339] RBP: 00007ffe3387de90 R08: 00007ffe3387df20 R09: 000000000000000c
[   47.293430] R10: 0000000000000000 R11: 0000000000000202 R12: 000000003da59430
[   47.293506] R13: 00007ffe3387eaa8 R14: 00007ffe3387e050 R15: 0000000000543540
[   47.293584]  </TASK>
[   47.293632] ---[ end trace 0000000000000000 ]---
[   47.293793] ------------[ cut here ]------------
[   47.293831] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.293884] Modules linked in:
[   47.293916] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.293986] Tainted: [W]=WARN
[   47.294008] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.294045] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.294074] 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
[   47.294176] RSP: 0018:ff5a04814038fbc8 EFLAGS: 00010286
[   47.294207] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.294253] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa9641dee500
[   47.294297] RBP: 0000000000000000 R08: ff28aa96432d3210 R09: ff28aa96419bc830
[   47.294342] R10: ff28aa9643e9c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.294392] R13: 0000000000000011 R14: ff28aa9643e9c000 R15: ff28aa9641dee500
[   47.294443] FS:  0000000000000000(0000) GS:ff28aa96f4816000(0000) knlGS:0000000000000000
[   47.294489] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.294525] CR2: 000055d286866c80 CR3: 0000000039642006 CR4: 0000000000771ef0
[   47.294572] PKRU: 55555554
[   47.294586] Call Trace:
[   47.294602]  <TASK>
[   47.294620]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.294653]  unregister_netdevice_queue+0x9e/0xd0
[   47.294685]  __tun_detach+0x591/0x5b0
[   47.294710]  tun_chr_close+0x3f/0xc0
[   47.294734]  __fput+0xe8/0x2c0
[   47.294762]  task_work_run+0x63/0xa0
[   47.294787]  do_exit+0x2c1/0xba0
[   47.294812]  do_group_exit+0x2d/0xc0
[   47.294834]  get_signal+0x82e/0x900
[   47.294856]  arch_do_signal_or_restart+0x77/0x2b0
[   47.294887]  exit_to_user_mode_loop+0x75/0x4a0
[   47.294919]  do_syscall_64+0x439/0xfc0
[   47.294945]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.294977] RIP: 0033:0x4c2d9e
[   47.295000] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.295034] RSP: 002b:00007ffe3387de80 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.295083] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   47.295125] RDX: 0000000000000014 RSI: 00007ffe3387df60 RDI: 0000000000000007
[   47.295169] RBP: 00007ffe3387de90 R08: 00007ffe3387df20 R09: 000000000000000c
[   47.295213] R10: 0000000000000000 R11: 0000000000000202 R12: 000000003da59430
[   47.295258] R13: 00007ffe3387eaa8 R14: 00007ffe3387e050 R15: 0000000000543540
[   47.295304]  </TASK>
[   47.295319] ---[ end trace 0000000000000000 ]---
[   47.304525] ------------[ cut here ]------------
[   47.304569] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[   47.304638] Modules linked in:
[   47.304661] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.304726] Tainted: [W]=WARN
[   47.304747] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.304779] Workqueue: netns cleanup_net
[   47.304807] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.304838] 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
[   47.304939] RSP: 0018:ff5a04814023fc78 EFLAGS: 00010286
[   47.304967] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.305010] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff28aa964306e300
[   47.305052] RBP: 0000000000000000 R08: ff28aa96432d3590 R09: ff28aa96419be82c
[   47.305085] R10: ff28aa964321d118 R11: fefefefefefefeff R12: 0000000000000000
[   47.305130] R13: 0000000000000011 R14: ff28aa964321d000 R15: ff28aa964306e300
[   47.305176] FS:  0000000000000000(0000) GS:ff28aa96f4696000(0000) knlGS:0000000000000000
[   47.305211] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.305246] CR2: 00007f58efeb6f98 CR3: 0000000039642002 CR4: 0000000000771ef0
[   47.305291] PKRU: 55555554
[   47.305306] Call Trace:
[   47.305319]  <TASK>
[   47.305335]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.305364]  default_device_exit_batch+0x318/0x390
[   47.305398]  ops_undo_list+0x10b/0x240
[   47.305419]  cleanup_net+0x1d7/0x2e0
[   47.305447]  process_one_work+0x162/0x360
[   47.305473]  worker_thread+0x16e/0x2d0
[   47.305496]  ? rescuer_thread+0x510/0x510
[   47.305519]  kthread+0xe1/0x120
[   47.305541]  ? kthread_park+0xa0/0xa0
[   47.305565]  ret_from_fork+0x16d/0x250
[   47.305587]  ? kthread_park+0xa0/0xa0
[   47.305606]  ret_from_fork_asm+0x11/0x20
[   47.305632]  </TASK>
[   47.305646] ---[ end trace 0000000000000000 ]---