[  138.691649] ------------[ cut here ]------------
[  138.691741] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/293
[  138.691846] Modules linked in:
[  138.691903] CPU: 2 UID: 0 PID: 293 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.691997] Tainted: [W]=WARN
[  138.692052] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.692123] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.692188] 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
[  138.692323] RSP: 0018:ff77a99b80397cc8 EFLAGS: 00010286
[  138.692386] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.692470] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e5d00
[  138.692553] RBP: 0000000000000000 R08: ff2556dc82ba5e90 R09: ff2556dc86a9a02c
[  138.692631] R10: ff2556dc82028118 R11: fefefefefefefeff R12: 0000000000000000
[  138.692709] R13: 0000000000000010 R14: ff2556dc82028000 R15: ff2556dc818e5d00
[  138.692791] FS:  00007f0b5ddc6740(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  138.692880] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.692950] CR2: 0000557d31285008 CR3: 000000000337b006 CR4: 0000000000771ef0
[  138.693028] PKRU: 55555554
[  138.693076] Call Trace:
[  138.693126]  <TASK>
[  138.693176]  rtmsg_ifinfo+0x3c/0xa0
[  138.693233]  register_netdevice+0x889/0x9f0
[  138.693292]  register_netdev+0x1e/0x30
[  138.693349]  loopback_net_init+0x57/0xb0
[  138.693409]  ? vsock_sysctl_init_net+0xb6/0x140
[  138.693476]  ops_init+0x68/0x140
[  138.693541]  setup_net+0x85/0x150
[  138.693599]  copy_net_ns+0xf5/0x200
[  138.693657]  create_new_namespaces+0x117/0x2f0
[  138.693723]  unshare_nsproxy_namespaces+0x85/0xb0
[  138.693788]  ksys_unshare+0x346/0x5e0
[  138.693851]  __x64_sys_unshare+0x12/0x20
[  138.693908]  do_syscall_64+0x104/0xfc0
[  138.693967]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.694032] RIP: 0033:0x7f0b5dec1bcb
[  138.694089] 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
[  138.694223] RSP: 002b:00007ffd886c4548 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  138.694301] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0b5dec1bcb
[  138.694377] RDX: 0000000000000000 RSI: 00007ffd886c42b0 RDI: 0000000040000000
[  138.694456] RBP: 00007ffd886c48d0 R08: 00007ffd886c44a0 R09: 0000000000000000
[  138.694539] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  138.694616] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000557cf3be2b68
[  138.694694]  </TASK>
[  138.694742] ---[ end trace 0000000000000000 ]---
[  138.695466] ------------[ cut here ]------------
[  138.695563] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/293
[  138.695655] Modules linked in:
[  138.695714] CPU: 2 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.695815] Tainted: [W]=WARN
[  138.695870] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.695939] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.696005] 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
[  138.696139] RSP: 0018:ff77a99b80397d68 EFLAGS: 00010286
[  138.696202] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  138.696282] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e5d00
[  138.696358] RBP: 0000000000000000 R08: ff2556dc8193f750 R09: ff2556dc8302f030
[  138.696436] R10: ff2556dc832e0118 R11: fefefefefefefeff R12: 0000000000000000
[  138.696512] R13: 0000000000000010 R14: ff2556dc832e0000 R15: ff2556dc818e5d00
[  138.696595] FS:  0000000028c94400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  138.696672] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.696740] CR2: 00007f5b81c51000 CR3: 0000000001938001 CR4: 0000000000771ef0
[  138.696828] PKRU: 55555554
[  138.696876] Call Trace:
[  138.696925]  <TASK>
[  138.696974]  rtmsg_ifinfo+0x3c/0xa0
[  138.697030]  register_netdevice+0x889/0x9f0
[  138.697087]  __tun_chr_ioctl+0x83c/0x16c0
[  138.697146]  ? do_sys_openat2+0x9a/0xe0
[  138.697204]  __x64_sys_ioctl+0xa1/0xe0
[  138.697262]  do_syscall_64+0x104/0xfc0
[  138.697320]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.697383] RIP: 0033:0x47cc8d
[  138.697439] 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
[  138.697578] RSP: 002b:00007fff696ec270 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.697654] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.697731] RDX: 00007fff696ec2f0 RSI: 00000000400454ca RDI: 0000000000000005
[  138.697813] RBP: 00007fff696ec2c0 R08: 0000000000000000 R09: 0000000000000000
[  138.697891] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff696ec7c8
[  138.697970] R13: 00007fff696ec848 R14: 0000000000000002 R15: 0000000000543540
[  138.698047]  </TASK>
[  138.698095] ---[ end trace 0000000000000000 ]---
[  138.698180] ------------[ cut here ]------------
[  138.698243] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/293
[  138.698329] Modules linked in:
[  138.698386] CPU: 2 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.698478] Tainted: [W]=WARN
[  138.698540] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.698610] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.698674] 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
[  138.698816] RSP: 0018:ff77a99b80397d60 EFLAGS: 00010286
[  138.698879] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  138.698956] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e5d00
[  138.699032] RBP: 0000000000000002 R08: ff2556dc8193f750 R09: ff2556dc8302f030
[  138.699108] R10: ff2556dc832e0118 R11: fefefefefefefeff R12: 0000000000000000
[  138.699187] R13: 0000000000000010 R14: ff2556dc832e0000 R15: ff2556dc818e5d00
[  138.699268] FS:  0000000028c94400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  138.699347] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.699417] CR2: 00007f5b81c51000 CR3: 0000000001938001 CR4: 0000000000771ef0
[  138.699497] PKRU: 55555554
[  138.699566] Call Trace:
[  138.699615]  <TASK>
[  138.699664]  rtnetlink_event+0x6e/0xb0
[  138.699721]  notifier_call_chain+0x6d/0x100
[  138.699781]  netdev_update_features+0x56/0x60
[  138.699853]  __tun_chr_ioctl+0xbf1/0x16c0
[  138.699911]  ? file_init_path+0x62/0x120
[  138.699970]  __x64_sys_ioctl+0xa1/0xe0
[  138.700028]  do_syscall_64+0x104/0xfc0
[  138.700086]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.700151] RIP: 0033:0x47cc8d
[  138.700207] 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
[  138.700340] RSP: 002b:00007fff696ec2b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.700418] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.700495] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  138.700578] RBP: 00007fff696ec300 R08: 0000000000000000 R09: 0000000000000000
[  138.700654] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff696ec7c8
[  138.700731] R13: 00007fff696ec848 R14: 0000000000000002 R15: 0000000000543540
[  138.700814]  </TASK>
[  138.700862] ---[ end trace 0000000000000000 ]---
[  138.700945] ------------[ cut here ]------------
[  138.701007] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/293
[  138.701092] Modules linked in:
[  138.701148] CPU: 2 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  138.701238] Tainted: [W]=WARN
[  138.701292] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  138.701362] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  138.701424] 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
[  138.701559] RSP: 0018:ff77a99b80397c10 EFLAGS: 00010286
[  138.701623] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  138.701699] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e5d00
[  138.701778] RBP: 0000000000000000 R08: ff2556dc8193f750 R09: ff2556dc86a9d030
[  138.701861] R10: ff2556dc832e0118 R11: fefefefefefefeff R12: 0000000000000000
[  138.701937] R13: 0000000000000010 R14: ff2556dc832e0000 R15: ff2556dc818e5d00
[  138.702019] FS:  0000000028c94400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  138.702097] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.702167] CR2: 00007f5b81c51000 CR3: 0000000001938001 CR4: 0000000000771ef0
[  138.702245] PKRU: 55555554
[  138.702293] Call Trace:
[  138.702341]  <TASK>
[  138.702388]  rtmsg_ifinfo+0x3c/0xa0
[  138.702444]  __dev_notify_flags+0xb1/0xf0
[  138.702502]  netif_change_flags+0x54/0x70
[  138.702563]  dev_change_flags+0x45/0x80
[  138.702620]  devinet_ioctl+0x607/0x7f0
[  138.702679]  inet_ioctl+0x229/0x240
[  138.702736]  ? __rtnl_unlock+0x35/0x60
[  138.702793]  sock_do_ioctl+0x75/0x140
[  138.702858]  __x64_sys_ioctl+0xa1/0xe0
[  138.702916]  do_syscall_64+0x104/0xfc0
[  138.702973]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  138.703038] RIP: 0033:0x47cc8d
[  138.703094] 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
[  138.703229] RSP: 002b:00007fff696ec290 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  138.703307] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  138.703383] RDX: 00007fff696ec300 RSI: 0000000000008914 RDI: 0000000000000006
[  138.703460] RBP: 00007fff696ec2e0 R08: 0000000000000000 R09: 0000000000000000
[  138.703544] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff696ec7c8
[  138.703620] R13: 00007fff696ec848 R14: 0000000000000002 R15: 0000000000543540
[  138.703698]  </TASK>
[  138.703746] ---[ end trace 0000000000000000 ]---
[  183.676490] ------------[ cut here ]------------
[  183.676607] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/293
[  183.676736] Modules linked in:
[  183.676836] CPU: 2 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.676934] Tainted: [W]=WARN
[  183.676992] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.677063] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.677128] 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
[  183.677263] RSP: 0018:ff77a99b80397b58 EFLAGS: 00010286
[  183.677327] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  183.677405] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818ea200
[  183.677482] RBP: 0000000000000000 R08: ff2556dc8193f750 R09: ff2556dc86a9d030
[  183.677561] R10: ff2556dc832e0118 R11: fefefefefefefeff R12: 0000000000000000
[  183.677638] R13: 0000000000000010 R14: ff2556dc832e0000 R15: ff2556dc818ea200
[  183.677755] FS:  0000000000000000(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  183.677891] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.677978] CR2: 00007f5b81c51000 CR3: 0000000004a42002 CR4: 0000000000771ef0
[  183.678105] PKRU: 55555554
[  183.678170] Call Trace:
[  183.678228]  <TASK>
[  183.678300]  rtmsg_ifinfo+0x3c/0xa0
[  183.678381]  netif_close_many+0xed/0x190
[  183.678461]  unregister_netdevice_many_notify+0x267/0x9d0
[  183.678562]  ? __queue_work+0x141/0x550
[  183.678639]  unregister_netdevice_queue+0x9e/0xd0
[  183.678742]  __tun_detach+0x591/0x5b0
[  183.678838]  tun_chr_close+0x3f/0xc0
[  183.678949]  __fput+0xe8/0x2c0
[  183.679033]  task_work_run+0x63/0xa0
[  183.679110]  do_exit+0x2c1/0xba0
[  183.679169]  ? ___sys_recvmsg+0xc6/0x100
[  183.679226]  do_group_exit+0x2d/0xc0
[  183.679283]  ? sk_prot_alloc.isra.0+0x87/0x100
[  183.679348]  ? cgroup_sk_alloc+0x5c/0x140
[  183.679408]  get_signal+0x82e/0x900
[  183.679494]  ? __d_alloc+0x40/0x200
[  183.679580]  ? sysvec_reschedule_ipi+0x25/0x120
[  183.679669]  arch_do_signal_or_restart+0x77/0x2b0
[  183.679744]  ? __sys_socket+0xda/0x130
[  183.679993]  exit_to_user_mode_loop+0x75/0x4a0
[  183.680066]  do_syscall_64+0x439/0xfc0
[  183.680125]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.680190] RIP: 0033:0x47ea2b
[  183.680247] Code: Unable to access opcode bytes at 0x47ea01.
[  183.680316] RSP: 002b:00007fff696ebd18 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  183.680395] RAX: 0000000000000007 RBX: 00007fff696ebdf0 RCX: 000000000047ea2b
[  183.680473] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  183.680550] RBP: 00007fff696ebd50 R08: 0000000000000041 R09: 0000000028c953e0
[  183.680628] R10: 0000000000000040 R11: 0000000000000202 R12: 00007fff696ec7c8
[  183.680713] R13: 00007fff696ec848 R14: 00007fff696ec2c8 R15: 0000000000543540
[  183.680792]  </TASK>
[  183.680845] ---[ end trace 0000000000000000 ]---
[  183.681003] ------------[ cut here ]------------
[  183.681038] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/293
[  183.681103] Modules linked in:
[  183.681129] CPU: 3 UID: 0 PID: 293 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.681192] Tainted: [W]=WARN
[  183.681214] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.681252] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.681280] 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
[  183.681380] RSP: 0018:ff77a99b80397bc8 EFLAGS: 00010286
[  183.681411] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.681457] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1200
[  183.681498] RBP: 0000000000000000 R08: ff2556dc8193f750 R09: ff2556dc89a90830
[  183.681541] R10: ff2556dc832e0118 R11: fefefefefefefeff R12: 0000000000000000
[  183.681583] R13: 0000000000000011 R14: ff2556dc832e0000 R15: ff2556dc818e1200
[  183.681631] FS:  0000000000000000(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  183.681673] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.681715] CR2: 00007fcf5faae0a0 CR3: 0000000004a42004 CR4: 0000000000771ef0
[  183.681758] PKRU: 55555554
[  183.681774] Call Trace:
[  183.681790]  <TASK>
[  183.681810]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.681842]  unregister_netdevice_queue+0x9e/0xd0
[  183.681873]  __tun_detach+0x591/0x5b0
[  183.681899]  tun_chr_close+0x3f/0xc0
[  183.681926]  __fput+0xe8/0x2c0
[  183.681947]  task_work_run+0x63/0xa0
[  183.681970]  do_exit+0x2c1/0xba0
[  183.681996]  ? ___sys_recvmsg+0xc6/0x100
[  183.682020]  do_group_exit+0x2d/0xc0
[  183.682042]  ? sk_prot_alloc.isra.0+0x87/0x100
[  183.682069]  ? cgroup_sk_alloc+0x5c/0x140
[  183.682092]  get_signal+0x82e/0x900
[  183.682115]  ? __d_alloc+0x40/0x200
[  183.682136]  ? sysvec_reschedule_ipi+0x25/0x120
[  183.682165]  arch_do_signal_or_restart+0x77/0x2b0
[  183.682195]  ? __sys_socket+0xda/0x130
[  183.682216]  exit_to_user_mode_loop+0x75/0x4a0
[  183.682245]  do_syscall_64+0x439/0xfc0
[  183.682266]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  183.682296] RIP: 0033:0x47ea2b
[  183.682318] Code: Unable to access opcode bytes at 0x47ea01.
[  183.682352] RSP: 002b:00007fff696ebd18 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
[  183.682394] RAX: 0000000000000007 RBX: 00007fff696ebdf0 RCX: 000000000047ea2b
[  183.682442] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[  183.682485] RBP: 00007fff696ebd50 R08: 0000000000000041 R09: 0000000028c953e0
[  183.682530] R10: 0000000000000040 R11: 0000000000000202 R12: 00007fff696ec7c8
[  183.682574] R13: 00007fff696ec848 R14: 00007fff696ec2c8 R15: 0000000000543540
[  183.682623]  </TASK>
[  183.682639] ---[ end trace 0000000000000000 ]---
[  183.693930] ------------[ cut here ]------------
[  183.693973] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:1/64
[  183.694046] Modules linked in:
[  183.694069] CPU: 1 UID: 0 PID: 64 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  183.694128] Tainted: [W]=WARN
[  183.694149] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  183.694185] Workqueue: netns cleanup_net
[  183.694208] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  183.694239] 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
[  183.694349] RSP: 0018:ff77a99b80237c78 EFLAGS: 00010286
[  183.694379] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  183.694425] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81d57c00
[  183.694468] RBP: 0000000000000000 R08: ff2556dc82ba5e90 R09: ff2556dc88df582c
[  183.694511] R10: ff2556dc82028118 R11: fefefefefefefeff R12: 0000000000000000
[  183.694555] R13: 0000000000000011 R14: ff2556dc82028000 R15: ff2556dc81d57c00
[  183.694593] FS:  0000000000000000(0000) GS:ff2556dd07f16000(0000) knlGS:0000000000000000
[  183.694639] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  183.694675] CR2: 00007f0dbc726f98 CR3: 0000000004a42006 CR4: 0000000000771ef0
[  183.694730] PKRU: 55555554
[  183.694745] Call Trace:
[  183.694760]  <TASK>
[  183.694776]  unregister_netdevice_many_notify+0x877/0x9d0
[  183.694815]  default_device_exit_batch+0x318/0x390
[  183.694846]  ops_undo_list+0x10b/0x240
[  183.694871]  cleanup_net+0x1d7/0x2e0
[  183.694895]  process_one_work+0x162/0x360
[  183.694925]  worker_thread+0x16e/0x2d0
[  183.694954]  ? rescuer_thread+0x510/0x510
[  183.694978]  kthread+0xe1/0x120
[  183.695002]  ? kthread_park+0xa0/0xa0
[  183.695025]  ret_from_fork+0x16d/0x250
[  183.695047]  ? kthread_park+0xa0/0xa0
[  183.695068]  ret_from_fork_asm+0x11/0x20
[  183.695093]  </TASK>
[  183.695106] ---[ end trace 0000000000000000 ]---