[  138.599576] ------------[ cut here ]------------
[  138.599619] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/292
[  138.599674] Modules linked in:
[  138.599694] CPU: 0 UID: 0 PID: 292 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.599756] Tainted: [W]=WARN
[  138.599778] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.599815] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.599845] 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
[  138.599945] RSP: 0018:ff82f7ea804c7cc8 EFLAGS: 00010286
[  138.599976] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.600015] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fdb500
[  138.600062] RBP: 0000000000000000 R08: ff3286d842fb7d50 R09: ff3286d84291d02c
[  138.600107] R10: ff3286d842d24118 R11: fefefefefefefeff R12: 0000000000000000
[  138.600151] R13: 0000000000000010 R14: ff3286d842d24000 R15: ff3286d842fdb500
[  138.600196] FS:  00007f557bd2e740(0000) GS:ff3286d8cd696000(0000) knlGS:0000000000000000
[  138.600241] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.600280] CR2: 00007f557bef0280 CR3: 0000000004d41004 CR4: 0000000000771ef0
[  138.600322] PKRU: 55555554
[  138.600337] Call Trace:
[  138.600351]  <TASK>
[  138.600366]  rtmsg_ifinfo+0x3c/0xa0
[  138.600388]  register_netdevice+0x889/0x9f0
[  138.600407]  register_netdev+0x1e/0x30
[  138.600431]  loopback_net_init+0x57/0xb0
[  138.600455]  ? vsock_sysctl_init_net+0xb6/0x140
[  138.600484]  ops_init+0x68/0x140
[  138.600504]  setup_net+0x85/0x150
[  138.600526]  copy_net_ns+0xf5/0x200
[  138.600552]  create_new_namespaces+0x117/0x2f0
[  138.600584]  unshare_nsproxy_namespaces+0x85/0xb0
[  138.600615]  ksys_unshare+0x346/0x5e0
[  138.600639]  __x64_sys_unshare+0x12/0x20
[  138.600663]  do_syscall_64+0x104/0xfc0
[  138.600685]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.600709] RIP: 0033:0x7f557be29bcb
[  138.600732] 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
[  138.600826] RSP: 002b:00007ffddefc0fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  138.600869] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f557be29bcb
[  138.600909] RDX: 0000000000000000 RSI: 00007ffddefc0d50 RDI: 0000000040000000
[  138.600947] RBP: 00007ffddefc1370 R08: 00007ffddefc0f40 R09: 0000000000000000
[  138.600984] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  138.601023] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005566ba4b5b68
[  138.601063]  </TASK>
[  138.601078] ---[ end trace 0000000000000000 ]---
[  138.601784] ------------[ cut here ]------------
[  138.601813] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/292
[  138.601865] Modules linked in:
[  138.601889] CPU: 0 UID: 0 PID: 292 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.601934] Tainted: [W]=WARN
[  138.601953] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.601986] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.602016] 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
[  138.602129] RSP: 0018:ff82f7ea804c7d68 EFLAGS: 00010286
[  138.602159] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.602203] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fdb500
[  138.602244] RBP: 0000000000000000 R08: ff3286d84319c6d0 R09: ff3286d843012030
[  138.602285] R10: ff3286d841cb4118 R11: fefefefefefefeff R12: 0000000000000000
[  138.602326] R13: 0000000000000010 R14: ff3286d841cb4000 R15: ff3286d842fdb500
[  138.602371] FS:  000000001c1d9400(0000) GS:ff3286d8cd696000(0000) knlGS:0000000000000000
[  138.602416] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.602451] CR2: 00007fab10d55000 CR3: 0000000001d75005 CR4: 0000000000771ef0
[  138.602495] PKRU: 55555554
[  138.602512] Call Trace:
[  138.602527]  <TASK>
[  138.602541]  rtmsg_ifinfo+0x3c/0xa0
[  138.602563]  register_netdevice+0x889/0x9f0
[  138.602586]  __tun_chr_ioctl+0x83c/0x16c0
[  138.602610]  ? do_sys_openat2+0x9a/0xe0
[  138.602633]  __x64_sys_ioctl+0xa1/0xe0
[  138.602657]  do_syscall_64+0x104/0xfc0
[  138.602680]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.602711] RIP: 0033:0x47cc8d
[  138.602735] 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
[  138.602830] RSP: 002b:00007ffd31cada10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.602875] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.602915] RDX: 00007ffd31cada90 RSI: 00000000400454ca RDI: 0000000000000005
[  138.602957] RBP: 00007ffd31cada60 R08: 0000000000000000 R09: 0000000000000000
[  138.603001] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd31cadf68
[  138.603046] R13: 00007ffd31cadfe8 R14: 0000000000000002 R15: 0000000000543540
[  138.603090]  </TASK>
[  138.603107] ---[ end trace 0000000000000000 ]---
[  138.603151] ------------[ cut here ]------------
[  138.603178] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/292
[  138.603234] Modules linked in:
[  138.603255] CPU: 0 UID: 0 PID: 292 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.603306] Tainted: [W]=WARN
[  138.603327] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.603365] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.603394] 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
[  138.603488] RSP: 0018:ff82f7ea804c7d60 EFLAGS: 00010286
[  138.603516] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  138.603556] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fdb500
[  138.603598] RBP: 0000000000000002 R08: ff3286d84319c6d0 R09: ff3286d843012030
[  138.603647] R10: ff3286d841cb4118 R11: fefefefefefefeff R12: 0000000000000000
[  138.603691] R13: 0000000000000010 R14: ff3286d841cb4000 R15: ff3286d842fdb500
[  138.603733] FS:  000000001c1d9400(0000) GS:ff3286d8cd696000(0000) knlGS:0000000000000000
[  138.603773] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.603810] CR2: 00007fab10d55000 CR3: 0000000001d75005 CR4: 0000000000771ef0
[  138.603848] PKRU: 55555554
[  138.603861] Call Trace:
[  138.603876]  <TASK>
[  138.603892]  rtnetlink_event+0x6e/0xb0
[  138.603913]  notifier_call_chain+0x6d/0x100
[  138.603933]  netdev_update_features+0x56/0x60
[  138.603964]  __tun_chr_ioctl+0xbf1/0x16c0
[  138.603987]  ? file_init_path+0x62/0x120
[  138.604009]  __x64_sys_ioctl+0xa1/0xe0
[  138.604033]  do_syscall_64+0x104/0xfc0
[  138.604052]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.604080] RIP: 0033:0x47cc8d
[  138.604103] 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
[  138.604195] RSP: 002b:00007ffd31cada50 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.604235] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.604275] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  138.604315] RBP: 00007ffd31cadaa0 R08: 0000000000000005 R09: 0000000000001ff0
[  138.604355] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffd31cadf68
[  138.604398] R13: 00007ffd31cadfe8 R14: 0000000000000002 R15: 0000000000543540
[  138.604439]  </TASK>
[  138.604453] ---[ end trace 0000000000000000 ]---
[  138.604497] ------------[ cut here ]------------
[  138.604529] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/292
[  138.604573] Modules linked in:
[  138.604596] CPU: 0 UID: 0 PID: 292 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.604652] Tainted: [W]=WARN
[  138.604673] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.604709] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.604738] 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
[  138.604832] RSP: 0018:ff82f7ea804c7c10 EFLAGS: 00010286
[  138.604862] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  138.604909] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fdb500
[  138.604949] RBP: 0000000000000000 R08: ff3286d84319c6d0 R09: ff3286d84291c030
[  138.604990] R10: ff3286d841cb4118 R11: fefefefefefefeff R12: 0000000000000000
[  138.605037] R13: 0000000000000010 R14: ff3286d841cb4000 R15: ff3286d842fdb500
[  138.605088] FS:  000000001c1d9400(0000) GS:ff3286d8cd696000(0000) knlGS:0000000000000000
[  138.605132] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.605169] CR2: 00007fab10d55000 CR3: 0000000001d75005 CR4: 0000000000771ef0
[  138.605212] PKRU: 55555554
[  138.605226] Call Trace:
[  138.605240]  <TASK>
[  138.605254]  rtmsg_ifinfo+0x3c/0xa0
[  138.605272]  __dev_notify_flags+0xb1/0xf0
[  138.605297]  netif_change_flags+0x54/0x70
[  138.605319]  dev_change_flags+0x45/0x80
[  138.605340]  devinet_ioctl+0x607/0x7f0
[  138.605363]  inet_ioctl+0x229/0x240
[  138.605385]  ? __rtnl_unlock+0x35/0x60
[  138.605408]  sock_do_ioctl+0x75/0x140
[  138.605433]  __x64_sys_ioctl+0xa1/0xe0
[  138.605455]  do_syscall_64+0x104/0xfc0
[  138.605477]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.605501] RIP: 0033:0x47cc8d
[  138.605524] 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
[  138.605629] RSP: 002b:00007ffd31cada30 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.605673] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.605716] RDX: 00007ffd31cadaa0 RSI: 0000000000008914 RDI: 0000000000000006
[  138.605756] RBP: 00007ffd31cada80 R08: 0000000000000005 R09: 0000000000001ff0
[  138.605798] R10: 0000000000000003 R11: 0000000000000246 R12: 00007ffd31cadf68
[  138.605842] R13: 00007ffd31cadfe8 R14: 0000000000000002 R15: 0000000000543540
[  138.605880]  </TASK>
[  138.605893] ---[ end trace 0000000000000000 ]---
[  183.586317] ------------[ cut here ]------------
[  183.586391] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/292
[  183.586458] Modules linked in:
[  183.586485] CPU: 0 UID: 0 PID: 292 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.586550] Tainted: [W]=WARN
[  183.586572] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.586602] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.586633] 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
[  183.586732] RSP: 0018:ff82f7ea804c7b58 EFLAGS: 00010286
[  183.586761] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  183.586804] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fd4600
[  183.586848] RBP: 0000000000000000 R08: ff3286d84319c6d0 R09: ff3286d84291c030
[  183.586883] R10: ff3286d841cb4118 R11: fefefefefefefeff R12: 0000000000000000
[  183.586926] R13: 0000000000000010 R14: ff3286d841cb4000 R15: ff3286d842fd4600
[  183.586972] FS:  0000000000000000(0000) GS:ff3286d8cd696000(0000) knlGS:0000000000000000
[  183.587013] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.587051] CR2: 00007fab10d55000 CR3: 0000000030e42001 CR4: 0000000000771ef0
[  183.587093] PKRU: 55555554
[  183.587358] Call Trace:
[  183.587375]  <TASK>
[  183.587398]  rtmsg_ifinfo+0x3c/0xa0
[  183.587427]  netif_close_many+0xed/0x190
[  183.587452]  unregister_netdevice_many_notify+0x267/0x9d0
[  183.587482]  ? __queue_work+0x141/0x550
[  183.587507]  unregister_netdevice_queue+0x9e/0xd0
[  183.587537]  __tun_detach+0x591/0x5b0
[  183.587564]  tun_chr_close+0x3f/0xc0
[  183.587589]  __fput+0xe8/0x2c0
[  183.587611]  task_work_run+0x63/0xa0
[  183.587634]  do_exit+0x2c1/0xba0
[  183.587659]  ? netlink_dump+0x336/0x450
[  183.587684]  do_group_exit+0x2d/0xc0
[  183.587708]  get_signal+0x82e/0x900
[  183.587729]  arch_do_signal_or_restart+0x77/0x2b0
[  183.587763]  exit_to_user_mode_loop+0x75/0x4a0
[  183.587790]  do_syscall_64+0x439/0xfc0
[  183.587816]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.587846] RIP: 0033:0x4c2d9e
[  183.587871] Code: Unable to access opcode bytes at 0x4c2d74.
[  183.587908] RSP: 002b:00007ffd31cad3c0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  183.587952] RAX: 0000000000000050 RBX: 00007ffd31cad450 RCX: 00000000004c2d9e
[  183.587997] RDX: 0000000000000000 RSI: 00007ffd31cad460 RDI: 0000000000000007
[  183.588039] RBP: 00007ffd31cad3d0 R08: 0000000000000000 R09: 0000000000000000
[  183.588080] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd31cad444
[  183.588125] R13: 00007ffd31cadfe8 R14: 00007ffd31cad590 R15: 0000000000543540
[  183.588170]  </TASK>
[  183.588183] ---[ end trace 0000000000000000 ]---
[  183.588288] ------------[ cut here ]------------
[  183.588316] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/292
[  183.588367] Modules linked in:
[  183.588388] CPU: 0 UID: 0 PID: 292 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.588442] Tainted: [W]=WARN
[  183.588463] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.588500] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.588531] 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
[  183.588628] RSP: 0018:ff82f7ea804c7bc8 EFLAGS: 00010286
[  183.588657] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.588699] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fd4600
[  183.588738] RBP: 0000000000000000 R08: ff3286d84319c6d0 R09: ff3286d847129830
[  183.588778] R10: ff3286d841cb4118 R11: fefefefefefefeff R12: 0000000000000000
[  183.588818] R13: 0000000000000011 R14: ff3286d841cb4000 R15: ff3286d842fd4600
[  183.588862] FS:  0000000000000000(0000) GS:ff3286d8cd696000(0000) knlGS:0000000000000000
[  183.588902] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.588935] CR2: 00007fab10d55000 CR3: 00000000030e7006 CR4: 0000000000771ef0
[  183.588977] PKRU: 55555554
[  183.588990] Call Trace:
[  183.589005]  <TASK>
[  183.589018]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.589053]  unregister_netdevice_queue+0x9e/0xd0
[  183.589082]  __tun_detach+0x591/0x5b0
[  183.589104]  tun_chr_close+0x3f/0xc0
[  183.589124]  __fput+0xe8/0x2c0
[  183.589151]  task_work_run+0x63/0xa0
[  183.589172]  do_exit+0x2c1/0xba0
[  183.589194]  ? netlink_dump+0x336/0x450
[  183.589217]  do_group_exit+0x2d/0xc0
[  183.589236]  get_signal+0x82e/0x900
[  183.589257]  arch_do_signal_or_restart+0x77/0x2b0
[  183.589284]  exit_to_user_mode_loop+0x75/0x4a0
[  183.589314]  do_syscall_64+0x439/0xfc0
[  183.589341]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.589369] RIP: 0033:0x4c2d9e
[  183.589389] Code: Unable to access opcode bytes at 0x4c2d74.
[  183.589427] RSP: 002b:00007ffd31cad3c0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  183.589466] RAX: 0000000000000050 RBX: 00007ffd31cad450 RCX: 00000000004c2d9e
[  183.589508] RDX: 0000000000000000 RSI: 00007ffd31cad460 RDI: 0000000000000007
[  183.589550] RBP: 00007ffd31cad3d0 R08: 0000000000000000 R09: 0000000000000000
[  183.589593] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd31cad444
[  183.589627] R13: 00007ffd31cadfe8 R14: 00007ffd31cad590 R15: 0000000000543540
[  183.589668]  </TASK>
[  183.589684] ---[ end trace 0000000000000000 ]---
[  183.600245] ------------[ cut here ]------------
[  183.600292] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:0/12
[  183.600356] Modules linked in:
[  183.600381] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.600442] Tainted: [W]=WARN
[  183.600462] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.600495] Workqueue: netns cleanup_net
[  183.600520] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.600550] 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
[  183.600646] RSP: 0018:ff82f7ea80067c78 EFLAGS: 00010286
[  183.600681] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.600731] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fd4700
[  183.600780] RBP: 0000000000000000 R08: ff3286d842fb7d50 R09: ff3286d84725b02c
[  183.600822] R10: ff3286d842d24118 R11: fefefefefefefeff R12: 0000000000000000
[  183.600862] R13: 0000000000000011 R14: ff3286d842d24000 R15: ff3286d842fd4700
[  183.600905] FS:  0000000000000000(0000) GS:ff3286d8cd716000(0000) knlGS:0000000000000000
[  183.600947] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.600981] CR2: 00007fe107c1d770 CR3: 0000000002eb2002 CR4: 0000000000771ef0
[  183.601020] PKRU: 55555554
[  183.601033] Call Trace:
[  183.601049]  <TASK>
[  183.601064]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.601094]  default_device_exit_batch+0x318/0x390
[  183.601131]  ops_undo_list+0x10b/0x240
[  183.601163]  cleanup_net+0x1d7/0x2e0
[  183.601183]  process_one_work+0x162/0x360
[  183.601207]  worker_thread+0x16e/0x2d0
[  183.601229]  ? rescuer_thread+0x510/0x510
[  183.601248]  kthread+0xe1/0x120
[  183.601271]  ? kthread_park+0xa0/0xa0
[  183.601293]  ret_from_fork+0x16d/0x250
[  183.601315]  ? kthread_park+0xa0/0xa0
[  183.601337]  ret_from_fork_asm+0x11/0x20
[  183.601360]  </TASK>
[  183.601377] ---[ end trace 0000000000000000 ]---