[   93.113241] ------------[ cut here ]------------
[   93.113286] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/249
[   93.113343] Modules linked in:
[   93.113369] CPU: 0 UID: 0 PID: 249 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.113418] Tainted: [W]=WARN
[   93.113440] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.113474] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.113506] 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
[   93.113598] RSP: 0018:ff78268c804cfcc8 EFLAGS: 00010286
[   93.113626] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.113673] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3a575ac192a000
[   93.113724] RBP: 0000000000000000 R08: ff3a575ac30c9850 R09: ff3a575ac299e02c
[   93.113769] R10: ff3a575ac51cd118 R11: fefefefefefefeff R12: 0000000000000000
[   93.113808] R13: 0000000000000010 R14: ff3a575ac51cd000 R15: ff3a575ac192a000
[   93.113855] FS:  00007f649181c740(0000) GS:ff3a575b5b896000(0000) knlGS:0000000000000000
[   93.113900] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.113928] CR2: 00005593cd5f3008 CR3: 0000000001983002 CR4: 0000000000771ef0
[   93.113967] PKRU: 55555554
[   93.113982] Call Trace:
[   93.113998]  <TASK>
[   93.114015]  rtmsg_ifinfo+0x3c/0xa0
[   93.114038]  register_netdevice+0x889/0x9f0
[   93.114063]  register_netdev+0x1e/0x30
[   93.114084]  loopback_net_init+0x57/0xb0
[   93.114108]  ? vsock_sysctl_init_net+0xb6/0x140
[   93.114138]  ops_init+0x68/0x140
[   93.114157]  setup_net+0x85/0x150
[   93.114179]  copy_net_ns+0xf5/0x200
[   93.114201]  create_new_namespaces+0x117/0x2f0
[   93.114227]  unshare_nsproxy_namespaces+0x85/0xb0
[   93.114256]  ksys_unshare+0x346/0x5e0
[   93.114280]  __x64_sys_unshare+0x12/0x20
[   93.114303]  do_syscall_64+0x104/0xfc0
[   93.114328]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.114355] RIP: 0033:0x7f6491917bcb
[   93.114375] 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
[   93.114474] RSP: 002b:00007ffc0d2eaa58 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[   93.114515] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6491917bcb
[   93.114556] RDX: 0000000000000000 RSI: 00007ffc0d2ea7c0 RDI: 0000000040000000
[   93.114601] RBP: 00007ffc0d2eade0 R08: 00007ffc0d2ea9b0 R09: 0000000000000000
[   93.114643] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[   93.114690] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005593be189b68
[   93.114734]  </TASK>
[   93.114748] ---[ end trace 0000000000000000 ]---
[   93.115363] ------------[ cut here ]------------
[   93.115407] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/249
[   93.115457] Modules linked in:
[   93.115480] CPU: 0 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.115539] Tainted: [W]=WARN
[   93.115559] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.115597] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.115626] 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
[   93.115735] RSP: 0018:ff78268c804cfd68 EFLAGS: 00010286
[   93.115761] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.115803] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3a575ac192a000
[   93.115841] RBP: 0000000000000000 R08: ff3a575ac3184450 R09: ff3a575ac3044030
[   93.115881] R10: ff3a575ac3174118 R11: fefefefefefefeff R12: 0000000000000000
[   93.115919] R13: 0000000000000010 R14: ff3a575ac3174000 R15: ff3a575ac192a000
[   93.115962] FS:  0000000009a93400(0000) GS:ff3a575b5b896000(0000) knlGS:0000000000000000
[   93.116005] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.116032] CR2: 00007f2149ff0000 CR3: 00000000030f6003 CR4: 0000000000771ef0
[   93.116073] PKRU: 55555554
[   93.116089] Call Trace:
[   93.116103]  <TASK>
[   93.116118]  rtmsg_ifinfo+0x3c/0xa0
[   93.116137]  register_netdevice+0x889/0x9f0
[   93.116158]  __tun_chr_ioctl+0x83c/0x16c0
[   93.116181]  ? do_sys_openat2+0x9a/0xe0
[   93.116207]  __x64_sys_ioctl+0xa1/0xe0
[   93.116230]  do_syscall_64+0x104/0xfc0
[   93.116253]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.116282] RIP: 0033:0x47cc8d
[   93.116304] 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
[   93.116399] RSP: 002b:00007ffda9df8210 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.116442] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.116482] RDX: 00007ffda9df8290 RSI: 00000000400454ca RDI: 0000000000000005
[   93.116516] RBP: 00007ffda9df8260 R08: 0000000000000000 R09: 0000000000000000
[   93.116556] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffda9df8768
[   93.116595] R13: 00007ffda9df87e8 R14: 0000000000000002 R15: 0000000000543540
[   93.116637]  </TASK>
[   93.116651] ---[ end trace 0000000000000000 ]---
[   93.116700] ------------[ cut here ]------------
[   93.116729] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/249
[   93.116780] Modules linked in:
[   93.116802] CPU: 0 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.116861] Tainted: [W]=WARN
[   93.116882] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.116923] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.116956] 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
[   93.117058] RSP: 0018:ff78268c804cfd60 EFLAGS: 00010286
[   93.117085] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[   93.117126] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3a575ac192a000
[   93.117168] RBP: 0000000000000002 R08: ff3a575ac3184450 R09: ff3a575ac3044030
[   93.117209] R10: ff3a575ac3174118 R11: fefefefefefefeff R12: 0000000000000000
[   93.117251] R13: 0000000000000010 R14: ff3a575ac3174000 R15: ff3a575ac192a000
[   93.117294] FS:  0000000009a93400(0000) GS:ff3a575b5b896000(0000) knlGS:0000000000000000
[   93.117336] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.117371] CR2: 00007f2149ff0000 CR3: 00000000030f6003 CR4: 0000000000771ef0
[   93.117414] PKRU: 55555554
[   93.117426] Call Trace:
[   93.117441]  <TASK>
[   93.117454]  rtnetlink_event+0x6e/0xb0
[   93.117474]  notifier_call_chain+0x6d/0x100
[   93.117496]  netdev_update_features+0x56/0x60
[   93.117525]  __tun_chr_ioctl+0xbf1/0x16c0
[   93.117548]  ? file_init_path+0x62/0x120
[   93.117570]  __x64_sys_ioctl+0xa1/0xe0
[   93.117596]  do_syscall_64+0x104/0xfc0
[   93.117618]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.117644] RIP: 0033:0x47cc8d
[   93.117666] 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
[   93.117771] RSP: 002b:00007ffda9df8250 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.117811] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.117856] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[   93.117899] RBP: 00007ffda9df82a0 R08: 0000000000000000 R09: 0000000000000000
[   93.117942] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffda9df8768
[   93.117985] R13: 00007ffda9df87e8 R14: 0000000000000002 R15: 0000000000543540
[   93.118028]  </TASK>
[   93.118045] ---[ end trace 0000000000000000 ]---
[   93.118087] ------------[ cut here ]------------
[   93.118112] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/249
[   93.118165] Modules linked in:
[   93.118188] CPU: 0 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.118245] Tainted: [W]=WARN
[   93.118266] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.118302] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.118326] 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
[   93.118428] RSP: 0018:ff78268c804cfc10 EFLAGS: 00010286
[   93.118459] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[   93.118504] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3a575ac192a000
[   93.118547] RBP: 0000000000000000 R08: ff3a575ac3184450 R09: ff3a575ac51cb030
[   93.118590] R10: ff3a575ac3174118 R11: fefefefefefefeff R12: 0000000000000000
[   93.118637] R13: 0000000000000010 R14: ff3a575ac3174000 R15: ff3a575ac192a000
[   93.118688] FS:  0000000009a93400(0000) GS:ff3a575b5b896000(0000) knlGS:0000000000000000
[   93.118764] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.118800] CR2: 00007f2149ff0000 CR3: 00000000030f6003 CR4: 0000000000771ef0
[   93.118844] PKRU: 55555554
[   93.118859] Call Trace:
[   93.118872]  <TASK>
[   93.118886]  rtmsg_ifinfo+0x3c/0xa0
[   93.118909]  __dev_notify_flags+0xb1/0xf0
[   93.118931]  netif_change_flags+0x54/0x70
[   93.118950]  dev_change_flags+0x45/0x80
[   93.118970]  devinet_ioctl+0x607/0x7f0
[   93.118996]  inet_ioctl+0x229/0x240
[   93.119020]  ? __rtnl_unlock+0x35/0x60
[   93.119042]  sock_do_ioctl+0x75/0x140
[   93.119067]  __x64_sys_ioctl+0xa1/0xe0
[   93.119088]  do_syscall_64+0x104/0xfc0
[   93.119108]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.119136] RIP: 0033:0x47cc8d
[   93.119155] 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
[   93.119249] RSP: 002b:00007ffda9df8230 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   93.119289] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   93.119336] RDX: 00007ffda9df82a0 RSI: 0000000000008914 RDI: 0000000000000006
[   93.119378] RBP: 00007ffda9df8280 R08: 0000000000000000 R09: 0000000000000000
[   93.119415] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffda9df8768
[   93.119461] R13: 00007ffda9df87e8 R14: 0000000000000002 R15: 0000000000543540
[   93.119503]  </TASK>
[   93.119517] ---[ end trace 0000000000000000 ]---
[  138.097952] ------------[ cut here ]------------
[  138.098031] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/249
[  138.098095] Modules linked in:
[  138.098120] CPU: 0 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.098182] Tainted: [W]=WARN
[  138.098207] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.098242] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.098267] 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
[  138.098367] RSP: 0018:ff78268c804cfb58 EFLAGS: 00010286
[  138.098399] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  138.098443] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3a575ac3091100
[  138.098487] RBP: 0000000000000000 R08: ff3a575ac3184450 R09: ff3a575ac51cb030
[  138.098533] R10: ff3a575ac3174118 R11: fefefefefefefeff R12: 0000000000000000
[  138.098576] R13: 0000000000000010 R14: ff3a575ac3174000 R15: ff3a575ac3091100
[  138.098618] FS:  0000000000000000(0000) GS:ff3a575b5b896000(0000) knlGS:0000000000000000
[  138.098662] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.098701] CR2: 00007f2149ff0000 CR3: 000000002f642004 CR4: 0000000000771ef0
[  138.098934] PKRU: 55555554
[  138.098962] Call Trace:
[  138.098981]  <TASK>
[  138.098998]  rtmsg_ifinfo+0x3c/0xa0
[  138.099048]  netif_close_many+0xed/0x190
[  138.099070]  unregister_netdevice_many_notify+0x267/0x9d0
[  138.099103]  ? __queue_work+0x141/0x550
[  138.099168]  unregister_netdevice_queue+0x9e/0xd0
[  138.099200]  __tun_detach+0x591/0x5b0
[  138.099229]  tun_chr_close+0x3f/0xc0
[  138.099247]  __fput+0xe8/0x2c0
[  138.099271]  task_work_run+0x63/0xa0
[  138.099295]  do_exit+0x2c1/0xba0
[  138.099321]  ? __x64_sys_close+0x47/0xa0
[  138.099345]  do_group_exit+0x2d/0xc0
[  138.099365]  get_signal+0x82e/0x900
[  138.099389]  ? fsnotify_grab_connector+0x4a/0x90
[  138.099419]  arch_do_signal_or_restart+0x77/0x2b0
[  138.099454]  ? __call_rcu_common.constprop.0+0x9a/0x340
[  138.099487]  ? __fput+0x17f/0x2c0
[  138.099504]  exit_to_user_mode_loop+0x75/0x4a0
[  138.099536]  do_syscall_64+0x439/0xfc0
[  138.099561]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.099588] RIP: 0033:0x47fb83
[  138.099607] Code: Unable to access opcode bytes at 0x47fb59.
[  138.099640] RSP: 002b:00007ffda9df7d00 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  138.099680] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[  138.099729] RDX: 000000000000000e RSI: 3ce49009f6288ae1 RDI: 0000000000000007
[  138.099770] RBP: 00007ffda9df8200 R08: 0000000000000041 R09: 0000000009a943e0
[  138.099809] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[  138.099858] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[  138.099898]  </TASK>
[  138.099912] ---[ end trace 0000000000000000 ]---
[  138.100025] ------------[ cut here ]------------
[  138.100088] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/249
[  138.100175] Modules linked in:
[  138.100231] CPU: 2 UID: 0 PID: 249 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.100323] Tainted: [W]=WARN
[  138.100377] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.100446] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.100513] 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
[  138.100643] RSP: 0018:ff78268c804cfbc8 EFLAGS: 00010286
[  138.100705] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.100791] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3a575ac190e600
[  138.100874] RBP: 0000000000000000 R08: ff3a575ac3184450 R09: ff3a575ac7113830
[  138.100952] R10: ff3a575ac3174118 R11: fefefefefefefeff R12: 0000000000000000
[  138.101030] R13: 0000000000000011 R14: ff3a575ac3174000 R15: ff3a575ac190e600
[  138.101113] FS:  0000000000000000(0000) GS:ff3a575b5b996000(0000) knlGS:0000000000000000
[  138.101191] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.101264] CR2: 00007f37f8504700 CR3: 0000000003137003 CR4: 0000000000771ef0
[  138.101343] PKRU: 55555554
[  138.101390] Call Trace:
[  138.101439]  <TASK>
[  138.101492]  unregister_netdevice_many_notify+0x877/0x9d0
[  138.101570]  unregister_netdevice_queue+0x9e/0xd0
[  138.101634]  __tun_detach+0x591/0x5b0
[  138.101698]  tun_chr_close+0x3f/0xc0
[  138.101760]  __fput+0xe8/0x2c0
[  138.101826]  task_work_run+0x63/0xa0
[  138.101883]  do_exit+0x2c1/0xba0
[  138.101939]  ? __x64_sys_close+0x47/0xa0
[  138.101995]  do_group_exit+0x2d/0xc0
[  138.102051]  get_signal+0x82e/0x900
[  138.102108]  ? fsnotify_grab_connector+0x4a/0x90
[  138.102171]  arch_do_signal_or_restart+0x77/0x2b0
[  138.102235]  ? __call_rcu_common.constprop.0+0x9a/0x340
[  138.102298]  ? __fput+0x17f/0x2c0
[  138.102354]  exit_to_user_mode_loop+0x75/0x4a0
[  138.102426]  do_syscall_64+0x439/0xfc0
[  138.102483]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.102547] RIP: 0033:0x47fb83
[  138.102609] Code: Unable to access opcode bytes at 0x47fb59.
[  138.102687] RSP: 002b:00007ffda9df7d00 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
[  138.102770] RAX: 0000000000000000 RBX: 00000000fffffff5 RCX: 000000000047fb83
[  138.102853] RDX: 000000000000000e RSI: 3ce49009f6288ae1 RDI: 0000000000000007
[  138.102935] RBP: 00007ffda9df8200 R08: 0000000000000041 R09: 0000000009a943e0
[  138.103014] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
[  138.103092] R13: fffffffffffffff0 R14: 0000000000000000 R15: 0000000000543540
[  138.103172]  </TASK>
[  138.103220] ---[ end trace 0000000000000000 ]---
[  138.116804] ------------[ cut here ]------------
[  138.116871] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:1/65
[  138.116928] Modules linked in:
[  138.116953] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.117009] Tainted: [W]=WARN
[  138.117032] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.117067] Workqueue: netns cleanup_net
[  138.117096] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.117127] 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
[  138.117222] RSP: 0018:ff78268c8023fc78 EFLAGS: 00010286
[  138.117253] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.117300] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3a575ac3091000
[  138.117341] RBP: 0000000000000000 R08: ff3a575ac30c9850 R09: ff3a575ac711002c
[  138.117386] R10: ff3a575ac51cd118 R11: fefefefefefefeff R12: 0000000000000000
[  138.117423] R13: 0000000000000011 R14: ff3a575ac51cd000 R15: ff3a575ac3091000
[  138.117463] FS:  0000000000000000(0000) GS:ff3a575b5ba16000(0000) knlGS:0000000000000000
[  138.117505] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.117540] CR2: 000055734ec922b8 CR3: 0000000003283005 CR4: 0000000000771ef0
[  138.117582] PKRU: 55555554
[  138.117595] Call Trace:
[  138.117611]  <TASK>
[  138.117627]  unregister_netdevice_many_notify+0x877/0x9d0
[  138.117659]  default_device_exit_batch+0x318/0x390
[  138.117686]  ops_undo_list+0x10b/0x240
[  138.117709]  cleanup_net+0x1d7/0x2e0
[  138.117740]  process_one_work+0x162/0x360
[  138.117763]  worker_thread+0x16e/0x2d0
[  138.117787]  ? rescuer_thread+0x510/0x510
[  138.117810]  kthread+0xe1/0x120
[  138.117837]  ? kthread_park+0xa0/0xa0
[  138.117861]  ret_from_fork+0x16d/0x250
[  138.117883]  ? kthread_park+0xa0/0xa0
[  138.117904]  ret_from_fork_asm+0x11/0x20
[  138.117929]  </TASK>
[  138.117943] ---[ end trace 0000000000000000 ]---