[    2.589536] ------------[ cut here ]------------
[    2.589632] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/159
[    2.589742] Modules linked in:
[    2.589809] CPU: 2 UID: 0 PID: 159 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.589917] Tainted: [W]=WARN
[    2.589990] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.590066] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.590157] 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
[    2.590295] RSP: 0018:ff4793520037fcc8 EFLAGS: 00010286
[    2.590362] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.590441] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa74314cf00
[    2.590527] RBP: 0000000000000000 R08: ff201fa741956250 R09: ff201fa74477302c
[    2.590608] R10: ff201fa7430c6118 R11: fefefefefefefeff R12: 0000000000000000
[    2.590690] R13: 0000000000000010 R14: ff201fa7430c6000 R15: ff201fa74314cf00
[    2.590776] FS:  00007fde31e25740(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[    2.590861] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.590944] CR2: 00007fde31ef0820 CR3: 00000000046c4004 CR4: 0000000000771ef0
[    2.591026] PKRU: 55555554
[    2.591077] Call Trace:
[    2.591131]  <TASK>
[    2.591183]  rtmsg_ifinfo+0x3c/0xa0
[    2.591244]  register_netdevice+0x889/0x9f0
[    2.591306]  register_netdev+0x1e/0x30
[    2.591367]  loopback_net_init+0x57/0xb0
[    2.591431]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.591514]  ops_init+0x68/0x140
[    2.591577]  setup_net+0x85/0x150
[    2.591639]  copy_net_ns+0xf5/0x200
[    2.591701]  create_new_namespaces+0x117/0x2f0
[    2.591771]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.591838]  ksys_unshare+0x346/0x5e0
[    2.591903]  __x64_sys_unshare+0x12/0x20
[    2.591972]  do_syscall_64+0x104/0xfc0
[    2.592035]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.592104] RIP: 0033:0x7fde31f20bcb
[    2.592165] 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
[    2.592299] RSP: 002b:00007fffda39ce88 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.592381] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fde31f20bcb
[    2.592462] RDX: 0000000000000000 RSI: 00007fffda39cbf0 RDI: 0000000040000000
[    2.592549] RBP: 00007fffda39d210 R08: 00007fffda39cde0 R09: 0000000000000000
[    2.592630] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.592710] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055b9f7a57b68
[    2.592792]  </TASK>
[    2.592844] ---[ end trace 0000000000000000 ]---
[    2.596769] ------------[ cut here ]------------
[    2.596844] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.596946] Modules linked in:
[    2.597009] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.597107] Tainted: [W]=WARN
[    2.597167] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.597240] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.597307] 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
[    2.597504] RSP: 0018:ff4793520037fd68 EFLAGS: 00010286
[    2.597571] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.597652] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa74314cf00
[    2.597732] RBP: 0000000000000000 R08: ff201fa7433df950 R09: ff201fa744770030
[    2.597814] R10: ff201fa7431cc118 R11: fefefefefefefeff R12: 0000000000000000
[    2.597894] R13: 0000000000000010 R14: ff201fa7431cc000 R15: ff201fa74314cf00
[    2.597982] FS:  000000002ec20400(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[    2.598065] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.598138] CR2: 00007f1def61b000 CR3: 0000000001983005 CR4: 0000000000771ef0
[    2.598222] PKRU: 55555554
[    2.598273] Call Trace:
[    2.598326]  <TASK>
[    2.598378]  rtmsg_ifinfo+0x3c/0xa0
[    2.598439]  register_netdevice+0x889/0x9f0
[    2.598507]  __tun_chr_ioctl+0x83c/0x16c0
[    2.598570]  ? do_sys_openat2+0x9a/0xe0
[    2.598633]  __x64_sys_ioctl+0xa1/0xe0
[    2.598696]  do_syscall_64+0x104/0xfc0
[    2.598758]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.598826] RIP: 0033:0x47cc8d
[    2.598887] 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
[    2.599036] RSP: 002b:00007fff695baed0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.599117] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.599199] RDX: 00007fff695baf50 RSI: 00000000400454ca RDI: 0000000000000005
[    2.599280] RBP: 00007fff695baf20 R08: 0000000000000000 R09: 0000000000000000
[    2.599360] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff695bb428
[    2.599440] R13: 00007fff695bb4a8 R14: 0000000000000002 R15: 0000000000543540
[    2.599527]  </TASK>
[    2.599579] ---[ end trace 0000000000000000 ]---
[    2.599666] ------------[ cut here ]------------
[    2.599732] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.599827] Modules linked in:
[    2.599887] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.599988] Tainted: [W]=WARN
[    2.600046] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.600120] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.600189] 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
[    2.600326] RSP: 0018:ff4793520037fd60 EFLAGS: 00010286
[    2.600406] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.600487] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa74314cf00
[    2.600573] RBP: 0000000000000002 R08: ff201fa7433df950 R09: ff201fa744770030
[    2.600652] R10: ff201fa7431cc118 R11: fefefefefefefeff R12: 0000000000000000
[    2.600732] R13: 0000000000000010 R14: ff201fa7431cc000 R15: ff201fa74314cf00
[    2.600815] FS:  000000002ec20400(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[    2.600899] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.600979] CR2: 00007f1def61b000 CR3: 0000000001983005 CR4: 0000000000771ef0
[    2.601061] PKRU: 55555554
[    2.601112] Call Trace:
[    2.601164]  <TASK>
[    2.601216]  rtnetlink_event+0x6e/0xb0
[    2.601277]  notifier_call_chain+0x6d/0x100
[    2.601339]  netdev_update_features+0x56/0x60
[    2.601408]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.601469]  ? file_init_path+0x62/0x120
[    2.601535]  __x64_sys_ioctl+0xa1/0xe0
[    2.601595]  do_syscall_64+0x104/0xfc0
[    2.601656]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.601724] RIP: 0033:0x47cc8d
[    2.601783] 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
[    2.601924] RSP: 002b:00007fff695baf10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.602013] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.602093] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.602179] RBP: 00007fff695baf60 R08: 0000000000000005 R09: 00000000000003a0
[    2.602261] R10: 0000000000000001 R11: 0000000000000246 R12: 00007fff695bb428
[    2.602341] R13: 00007fff695bb4a8 R14: 0000000000000002 R15: 0000000000543540
[    2.602422]  </TASK>
[    2.602473] ---[ end trace 0000000000000000 ]---
[    2.602566] ------------[ cut here ]------------
[    2.602631] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[    2.602720] Modules linked in:
[    2.602780] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.602878] Tainted: [W]=WARN
[    2.602945] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.603020] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.603088] 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
[    2.603231] RSP: 0018:ff4793520037fc10 EFLAGS: 00010286
[    2.603298] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.603379] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa74314cf00
[    2.603463] RBP: 0000000000000000 R08: ff201fa7433df950 R09: ff201fa744775030
[    2.603550] R10: ff201fa7431cc118 R11: fefefefefefefeff R12: 0000000000000000
[    2.603632] R13: 0000000000000010 R14: ff201fa7431cc000 R15: ff201fa74314cf00
[    2.603716] FS:  000000002ec20400(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[    2.603798] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.603872] CR2: 00007f1def61b000 CR3: 0000000001983005 CR4: 0000000000771ef0
[    2.603961] PKRU: 55555554
[    2.604013] Call Trace:
[    2.604065]  <TASK>
[    2.604118]  rtmsg_ifinfo+0x3c/0xa0
[    2.604178]  __dev_notify_flags+0xb1/0xf0
[    2.604240]  netif_change_flags+0x54/0x70
[    2.604302]  dev_change_flags+0x45/0x80
[    2.604363]  devinet_ioctl+0x607/0x7f0
[    2.604427]  inet_ioctl+0x229/0x240
[    2.604489]  ? __rtnl_unlock+0x35/0x60
[    2.604558]  sock_do_ioctl+0x75/0x140
[    2.604622]  __x64_sys_ioctl+0xa1/0xe0
[    2.604683]  do_syscall_64+0x104/0xfc0
[    2.604745]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.604812] RIP: 0033:0x47cc8d
[    2.604872] 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
[    2.605013] RSP: 002b:00007fff695baef0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.605095] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.605177] RDX: 00007fff695baf60 RSI: 0000000000008914 RDI: 0000000000000006
[    2.605260] RBP: 00007fff695baf40 R08: 0000000000000005 R09: 00000000000003a0
[    2.605341] R10: 0000000000000001 R11: 0000000000000246 R12: 00007fff695bb428
[    2.605420] R13: 00007fff695bb4a8 R14: 0000000000000002 R15: 0000000000543540
[    2.605512]  </TASK>
[    2.605564] ---[ end trace 0000000000000000 ]---
[   47.567834] ------------[ cut here ]------------
[   47.567947] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/159
[   47.568045] Modules linked in:
[   47.568139] CPU: 2 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.568247] Tainted: [W]=WARN
[   47.568307] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.568382] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.568450] 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
[   47.568595] RSP: 0018:ff4793520037fb58 EFLAGS: 00010286
[   47.568665] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.568747] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa742fa9d00
[   47.568830] RBP: 0000000000000000 R08: ff201fa7433df950 R09: ff201fa744775030
[   47.568909] R10: ff201fa7431cc118 R11: fefefefefefefeff R12: 0000000000000000
[   47.568991] R13: 0000000000000010 R14: ff201fa7431cc000 R15: ff201fa742fa9d00
[   47.569080] FS:  0000000000000000(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[   47.569172] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.569246] CR2: 00007f1def61b000 CR3: 000000001b042002 CR4: 0000000000771ef0
[   47.569329] PKRU: 55555554
[   47.569381] Call Trace:
[   47.569434]  <TASK>
[   47.569487]  rtmsg_ifinfo+0x3c/0xa0
[   47.569720]  netif_close_many+0xed/0x190
[   47.569784]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.569853]  ? __queue_work+0x141/0x550
[   47.569917]  unregister_netdevice_queue+0x9e/0xd0
[   47.569984]  __tun_detach+0x591/0x5b0
[   47.570048]  tun_chr_close+0x3f/0xc0
[   47.570109]  __fput+0xe8/0x2c0
[   47.570179]  task_work_run+0x63/0xa0
[   47.570241]  do_exit+0x2c1/0xba0
[   47.570303]  do_group_exit+0x2d/0xc0
[   47.570364]  get_signal+0x82e/0x900
[   47.570425]  ? __d_alloc+0x40/0x200
[   47.570486]  ? alloc_empty_file+0x3f/0xd0
[   47.570555]  arch_do_signal_or_restart+0x77/0x2b0
[   47.570624]  ? alloc_file_pseudo+0xc1/0x110
[   47.570686]  ? __sys_socket+0xda/0x130
[   47.570747]  exit_to_user_mode_loop+0x75/0x4a0
[   47.570817]  do_syscall_64+0x439/0xfc0
[   47.570881]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.570949] RIP: 0033:0x47ea2b
[   47.571009] Code: Unable to access opcode bytes at 0x47ea01.
[   47.571083] RSP: 002b:00007fff695ba978 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[   47.571171] RAX: 0000000000000007 RBX: 00007fff695baa50 RCX: 000000000047ea2b
[   47.571253] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[   47.571335] RBP: 00007fff695ba9b0 R08: 0000000000000041 R09: 000000002ec213e0
[   47.571416] R10: 0000000000000040 R11: 0000000000000202 R12: 00007fff695bb428
[   47.571504] R13: 00007fff695bb4a8 R14: 00007fff695baf28 R15: 0000000000543540
[   47.571587]  </TASK>
[   47.571639] ---[ end trace 0000000000000000 ]---
[   47.571801] ------------[ cut here ]------------
[   47.571839] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.571897] Modules linked in:
[   47.571921] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.571983] Tainted: [W]=WARN
[   47.572004] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.572042] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.572072] 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
[   47.572263] RSP: 0018:ff4793520037fbc8 EFLAGS: 00010286
[   47.572322] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.572415] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa74314ca00
[   47.572517] RBP: 0000000000000000 R08: ff201fa7433df950 R09: ff201fa74477a830
[   47.572603] R10: ff201fa7431cc118 R11: fefefefefefefeff R12: 0000000000000000
[   47.572692] R13: 0000000000000011 R14: ff201fa7431cc000 R15: ff201fa74314ca00
[   47.572755] FS:  0000000000000000(0000) GS:ff201fa7e8a16000(0000) knlGS:0000000000000000
[   47.572834] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.572907] CR2: 00007fb82394c2a0 CR3: 000000001b042004 CR4: 0000000000771ef0
[   47.573001] PKRU: 55555554
[   47.573026] Call Trace:
[   47.573053]  <TASK>
[   47.573067]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.573126]  unregister_netdevice_queue+0x9e/0xd0
[   47.573161]  __tun_detach+0x591/0x5b0
[   47.573212]  tun_chr_close+0x3f/0xc0
[   47.573254]  __fput+0xe8/0x2c0
[   47.573297]  task_work_run+0x63/0xa0
[   47.573359]  do_exit+0x2c1/0xba0
[   47.573390]  do_group_exit+0x2d/0xc0
[   47.573430]  get_signal+0x82e/0x900
[   47.573479]  ? __d_alloc+0x40/0x200
[   47.573528]  ? alloc_empty_file+0x3f/0xd0
[   47.573557]  arch_do_signal_or_restart+0x77/0x2b0
[   47.573644]  ? alloc_file_pseudo+0xc1/0x110
[   47.573665]  ? __sys_socket+0xda/0x130
[   47.573713]  exit_to_user_mode_loop+0x75/0x4a0
[   47.573739]  do_syscall_64+0x439/0xfc0
[   47.573763]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.573811] RIP: 0033:0x47ea2b
[   47.573853] Code: Unable to access opcode bytes at 0x47ea01.
[   47.573927] RSP: 002b:00007fff695ba978 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[   47.573970] RAX: 0000000000000007 RBX: 00007fff695baa50 RCX: 000000000047ea2b
[   47.574011] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[   47.574071] RBP: 00007fff695ba9b0 R08: 0000000000000041 R09: 000000002ec213e0
[   47.574124] R10: 0000000000000040 R11: 0000000000000202 R12: 00007fff695bb428
[   47.574171] R13: 00007fff695bb4a8 R14: 00007fff695baf28 R15: 0000000000543540
[   47.574219]  </TASK>
[   47.574233] ---[ end trace 0000000000000000 ]---
[   47.582615] ------------[ cut here ]------------
[   47.582654] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:0/12
[   47.582720] Modules linked in:
[   47.582746] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.582792] Tainted: [W]=WARN
[   47.582813] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.582852] Workqueue: netns cleanup_net
[   47.582878] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.582917] 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
[   47.583018] RSP: 0018:ff47935200067c78 EFLAGS: 00010286
[   47.583047] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.583093] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa741911900
[   47.583139] RBP: 0000000000000000 R08: ff201fa741956250 R09: ff201fa74312582c
[   47.583187] R10: ff201fa7430c6118 R11: fefefefefefefeff R12: 0000000000000000
[   47.583231] R13: 0000000000000011 R14: ff201fa7430c6000 R15: ff201fa741911900
[   47.583279] FS:  0000000000000000(0000) GS:ff201fa7e8896000(0000) knlGS:0000000000000000
[   47.583325] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.583363] CR2: 000055558cd65340 CR3: 0000000002ee3004 CR4: 0000000000771ef0
[   47.583407] PKRU: 55555554
[   47.583422] Call Trace:
[   47.583442]  <TASK>
[   47.583458]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.583496]  default_device_exit_batch+0x318/0x390
[   47.583525]  ops_undo_list+0x10b/0x240
[   47.583551]  cleanup_net+0x1d7/0x2e0
[   47.583573]  process_one_work+0x162/0x360
[   47.583600]  worker_thread+0x16e/0x2d0
[   47.583628]  ? rescuer_thread+0x510/0x510
[   47.583653]  kthread+0xe1/0x120
[   47.583677]  ? kthread_park+0xa0/0xa0
[   47.583700]  ret_from_fork+0x16d/0x250
[   47.583720]  ? kthread_park+0xa0/0xa0
[   47.583742]  ret_from_fork_asm+0x11/0x20
[   47.583767]  </TASK>
[   47.583781] ---[ end trace 0000000000000000 ]---