[    2.431965] ------------[ cut here ]------------
[    2.432020] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/159
[    2.432095] Modules linked in:
[    2.432132] CPU: 3 UID: 0 PID: 159 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.432204] Tainted: [W]=WARN
[    2.432229] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.432277] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.432315] 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
[    2.432427] RSP: 0018:ff5eed03403a7cc8 EFLAGS: 00010286
[    2.432464] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.432518] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1d22b3c3347e00
[    2.432578] RBP: 0000000000000000 R08: ff1d22b3c3359a90 R09: ff1d22b3c46e202c
[    2.432626] R10: ff1d22b3c19c5118 R11: fefefefefefefeff R12: 0000000000000000
[    2.432668] R13: 0000000000000010 R14: ff1d22b3c19c5000 R15: ff1d22b3c3347e00
[    2.432731] FS:  00007f3e715bb740(0000) GS:ff1d22b468416000(0000) knlGS:0000000000000000
[    2.432795] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.432846] CR2: 00005564a4f35310 CR3: 0000000003286006 CR4: 0000000000771ef0
[    2.432898] PKRU: 55555554
[    2.432924] Call Trace:
[    2.432940]  <TASK>
[    2.432958]  rtmsg_ifinfo+0x3c/0xa0
[    2.433011]  register_netdevice+0x889/0x9f0
[    2.433031]  register_netdev+0x1e/0x30
[    2.433051]  loopback_net_init+0x57/0xb0
[    2.433099]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.433140]  ops_init+0x68/0x140
[    2.433166]  setup_net+0x85/0x150
[    2.433203]  copy_net_ns+0xf5/0x200
[    2.433224]  create_new_namespaces+0x117/0x2f0
[    2.433259]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.433298]  ksys_unshare+0x346/0x5e0
[    2.433327]  __x64_sys_unshare+0x12/0x20
[    2.433348]  do_syscall_64+0x104/0xfc0
[    2.433381]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.433417] RIP: 0033:0x7f3e716b6bcb
[    2.433450] 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
[    2.433574] RSP: 002b:00007ffc5135dbb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.433624] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3e716b6bcb
[    2.433668] RDX: 0000000000000000 RSI: 00007ffc5135d920 RDI: 0000000040000000
[    2.433713] RBP: 00007ffc5135df40 R08: 00007ffc5135db10 R09: 0000000000000000
[    2.433758] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.433794] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005564a4f38b68
[    2.433843]  </TASK>
[    2.433858] ---[ end trace 0000000000000000 ]---
[    2.437604] ------------[ cut here ]------------
[    2.437646] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.437705] Modules linked in:
[    2.437732] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.437795] Tainted: [W]=WARN
[    2.437820] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.437861] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.437890] 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
[    2.437994] RSP: 0018:ff5eed03403a7d68 EFLAGS: 00010286
[    2.438024] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.438068] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1d22b3c3347e00
[    2.438115] RBP: 0000000000000000 R08: ff1d22b3c3359bd0 R09: ff1d22b3c46e7030
[    2.438160] R10: ff1d22b3c4620118 R11: fefefefefefefeff R12: 0000000000000000
[    2.438202] R13: 0000000000000010 R14: ff1d22b3c4620000 R15: ff1d22b3c3347e00
[    2.438249] FS:  000000000229f400(0000) GS:ff1d22b468416000(0000) knlGS:0000000000000000
[    2.438298] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.438335] CR2: 00007f472dbac000 CR3: 0000000004680001 CR4: 0000000000771ef0
[    2.438380] PKRU: 55555554
[    2.438397] Call Trace:
[    2.438412]  <TASK>
[    2.438426]  rtmsg_ifinfo+0x3c/0xa0
[    2.438448]  register_netdevice+0x889/0x9f0
[    2.438471]  __tun_chr_ioctl+0x83c/0x16c0
[    2.438496]  ? do_sys_openat2+0x9a/0xe0
[    2.438522]  __x64_sys_ioctl+0xa1/0xe0
[    2.438549]  do_syscall_64+0x104/0xfc0
[    2.438575]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.438606] RIP: 0033:0x47cc8d
[    2.438630] 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
[    2.438733] RSP: 002b:00007ffd995fefa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.438778] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.438823] RDX: 00007ffd995ff020 RSI: 00000000400454ca RDI: 0000000000000005
[    2.438866] RBP: 00007ffd995feff0 R08: 0000000000000000 R09: 0000000000000000
[    2.438912] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd995ff4f8
[    2.438958] R13: 00007ffd995ff578 R14: 0000000000000002 R15: 0000000000543540
[    2.438998]  </TASK>
[    2.439014] ---[ end trace 0000000000000000 ]---
[    2.439056] ------------[ cut here ]------------
[    2.439091] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.439142] Modules linked in:
[    2.439167] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.439226] Tainted: [W]=WARN
[    2.439247] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.439282] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.439313] 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
[    2.439417] RSP: 0018:ff5eed03403a7d60 EFLAGS: 00010286
[    2.439447] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.439490] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1d22b3c3347e00
[    2.439534] RBP: 0000000000000002 R08: ff1d22b3c3359bd0 R09: ff1d22b3c46e7030
[    2.439581] R10: ff1d22b3c4620118 R11: fefefefefefefeff R12: 0000000000000000
[    2.439628] R13: 0000000000000010 R14: ff1d22b3c4620000 R15: ff1d22b3c3347e00
[    2.439672] FS:  000000000229f400(0000) GS:ff1d22b468416000(0000) knlGS:0000000000000000
[    2.439718] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.439748] CR2: 00007f472dbac000 CR3: 0000000004680001 CR4: 0000000000771ef0
[    2.439791] PKRU: 55555554
[    2.439806] Call Trace:
[    2.439820]  <TASK>
[    2.439835]  rtnetlink_event+0x6e/0xb0
[    2.439857]  notifier_call_chain+0x6d/0x100
[    2.439881]  netdev_update_features+0x56/0x60
[    2.439914]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.439936]  ? file_init_path+0x62/0x120
[    2.439958]  __x64_sys_ioctl+0xa1/0xe0
[    2.439981]  do_syscall_64+0x104/0xfc0
[    2.440002]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.440032] RIP: 0033:0x47cc8d
[    2.440051] 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
[    2.440162] RSP: 002b:00007ffd995fefe0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.440209] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.440250] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.440290] RBP: 00007ffd995ff030 R08: 0000000000000000 R09: 0000000000000000
[    2.440333] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd995ff4f8
[    2.440377] R13: 00007ffd995ff578 R14: 0000000000000002 R15: 0000000000543540
[    2.440421]  </TASK>
[    2.440435] ---[ end trace 0000000000000000 ]---
[    2.440473] ------------[ cut here ]------------
[    2.440506] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.440559] Modules linked in:
[    2.440581] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.440641] Tainted: [W]=WARN
[    2.440663] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.440703] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.440732] 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
[    2.440832] RSP: 0018:ff5eed03403a7c10 EFLAGS: 00010286
[    2.440861] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.440902] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1d22b3c3347e00
[    2.440948] RBP: 0000000000000000 R08: ff1d22b3c3359bd0 R09: ff1d22b3c46e4030
[    2.440993] R10: ff1d22b3c4620118 R11: fefefefefefefeff R12: 0000000000000000
[    2.441045] R13: 0000000000000010 R14: ff1d22b3c4620000 R15: ff1d22b3c3347e00
[    2.441091] FS:  000000000229f400(0000) GS:ff1d22b468416000(0000) knlGS:0000000000000000
[    2.441127] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.441164] CR2: 00007f472dbac000 CR3: 0000000004680001 CR4: 0000000000771ef0
[    2.441217] PKRU: 55555554
[    2.441232] Call Trace:
[    2.441249]  <TASK>
[    2.441263]  rtmsg_ifinfo+0x3c/0xa0
[    2.441287]  __dev_notify_flags+0xb1/0xf0
[    2.441311]  netif_change_flags+0x54/0x70
[    2.441335]  dev_change_flags+0x45/0x80
[    2.441361]  devinet_ioctl+0x607/0x7f0
[    2.441386]  inet_ioctl+0x229/0x240
[    2.441408]  ? __rtnl_unlock+0x35/0x60
[    2.441429]  sock_do_ioctl+0x75/0x140
[    2.441455]  __x64_sys_ioctl+0xa1/0xe0
[    2.441483]  do_syscall_64+0x104/0xfc0
[    2.441505]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.441536] RIP: 0033:0x47cc8d
[    2.441557] 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
[    2.441665] RSP: 002b:00007ffd995fefc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.441711] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.441753] RDX: 00007ffd995ff030 RSI: 0000000000008914 RDI: 0000000000000006
[    2.441795] RBP: 00007ffd995ff010 R08: 0000000000000000 R09: 0000000000000000
[    2.441839] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd995ff4f8
[    2.441879] R13: 00007ffd995ff578 R14: 0000000000000002 R15: 0000000000543540
[    2.441921]  </TASK>
[    2.441936] ---[ end trace 0000000000000000 ]---
[   47.411870] ------------[ cut here ]------------
[   47.411962] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.412028] Modules linked in:
[   47.412051] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.412112] Tainted: [W]=WARN
[   47.412139] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.412174] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.412206] 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
[   47.412308] RSP: 0018:ff5eed03403a7b58 EFLAGS: 00010286
[   47.412345] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.412391] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1d22b3c1d7b200
[   47.412436] RBP: 0000000000000000 R08: ff1d22b3c3359bd0 R09: ff1d22b3c46e4030
[   47.412486] R10: ff1d22b3c4620118 R11: fefefefefefefeff R12: 0000000000000000
[   47.412532] R13: 0000000000000010 R14: ff1d22b3c4620000 R15: ff1d22b3c1d7b200
[   47.412581] FS:  0000000000000000(0000) GS:ff1d22b468416000(0000) knlGS:0000000000000000
[   47.412629] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.412659] CR2: 00007f472dbac000 CR3: 0000000011842002 CR4: 0000000000771ef0
[   47.412711] PKRU: 55555554
[   47.412727] Call Trace:
[   47.412744]  <TASK>
[   47.412761]  rtmsg_ifinfo+0x3c/0xa0
[   47.412786]  netif_close_many+0xed/0x190
[   47.412811]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.412841]  ? __queue_work+0x141/0x550
[   47.412868]  unregister_netdevice_queue+0x9e/0xd0
[   47.412898]  __tun_detach+0x591/0x5b0
[   47.412929]  tun_chr_close+0x3f/0xc0
[   47.412953]  __fput+0xe8/0x2c0
[   47.412980]  task_work_run+0x63/0xa0
[   47.413003]  do_exit+0x2c1/0xba0
[   47.413068]  do_group_exit+0x2d/0xc0
[   47.413091]  get_signal+0x82e/0x900
[   47.413118]  ? __d_alloc+0x40/0x200
[   47.413139]  ? alloc_empty_file+0x3f/0xd0
[   47.413163]  arch_do_signal_or_restart+0x77/0x2b0
[   47.413195]  ? alloc_file_pseudo+0xc1/0x110
[   47.413221]  ? __sys_socket+0xda/0x130
[   47.413246]  exit_to_user_mode_loop+0x75/0x4a0
[   47.413278]  do_syscall_64+0x439/0xfc0
[   47.413305]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.413344] RIP: 0033:0x47ea2b
[   47.413369] Code: Unable to access opcode bytes at 0x47ea01.
[   47.413411] RSP: 002b:00007ffd995fea48 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
[   47.413455] RAX: 0000000000000007 RBX: 00007ffd995feb20 RCX: 000000000047ea2b
[   47.413499] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[   47.413543] RBP: 00007ffd995fea80 R08: 0000000000000041 R09: 00000000022a03e0
[   47.413584] R10: 0000000000000040 R11: 0000000000000206 R12: 00007ffd995ff4f8
[   47.413637] R13: 00007ffd995ff578 R14: 00007ffd995feff8 R15: 0000000000543540
[   47.413685]  </TASK>
[   47.413701] ---[ end trace 0000000000000000 ]---
[   47.413822] ------------[ cut here ]------------
[   47.413868] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/159
[   47.413923] Modules linked in:
[   47.413948] CPU: 0 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.414016] Tainted: [W]=WARN
[   47.414040] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.414075] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.414105] 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
[   47.414193] RSP: 0018:ff5eed03403a7bc8 EFLAGS: 00010286
[   47.414225] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.414268] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1d22b3c3347c00
[   47.414311] RBP: 0000000000000000 R08: ff1d22b3c3359bd0 R09: ff1d22b3c3037830
[   47.414358] R10: ff1d22b3c4620118 R11: fefefefefefefeff R12: 0000000000000000
[   47.414401] R13: 0000000000000011 R14: ff1d22b3c4620000 R15: ff1d22b3c3347c00
[   47.414451] FS:  0000000000000000(0000) GS:ff1d22b468296000(0000) knlGS:0000000000000000
[   47.414502] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.414539] CR2: 000055b428f3bcc0 CR3: 0000000011842005 CR4: 0000000000771ef0
[   47.414582] PKRU: 55555554
[   47.414598] Call Trace:
[   47.414614]  <TASK>
[   47.414628]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.414657]  unregister_netdevice_queue+0x9e/0xd0
[   47.414693]  __tun_detach+0x591/0x5b0
[   47.414719]  tun_chr_close+0x3f/0xc0
[   47.414741]  __fput+0xe8/0x2c0
[   47.414764]  task_work_run+0x63/0xa0
[   47.414790]  do_exit+0x2c1/0xba0
[   47.414813]  do_group_exit+0x2d/0xc0
[   47.414835]  get_signal+0x82e/0x900
[   47.414861]  ? __d_alloc+0x40/0x200
[   47.414883]  ? alloc_empty_file+0x3f/0xd0
[   47.414907]  arch_do_signal_or_restart+0x77/0x2b0
[   47.414936]  ? alloc_file_pseudo+0xc1/0x110
[   47.414959]  ? __sys_socket+0xda/0x130
[   47.414980]  exit_to_user_mode_loop+0x75/0x4a0
[   47.415012]  do_syscall_64+0x439/0xfc0
[   47.415035]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.415064] RIP: 0033:0x47ea2b
[   47.415086] Code: Unable to access opcode bytes at 0x47ea01.
[   47.415120] RSP: 002b:00007ffd995fea48 EFLAGS: 00000206 ORIG_RAX: 0000000000000029
[   47.415164] RAX: 0000000000000007 RBX: 00007ffd995feb20 RCX: 000000000047ea2b
[   47.415214] RDX: 0000000000000000 RSI: 0000000000080003 RDI: 0000000000000010
[   47.415257] RBP: 00007ffd995fea80 R08: 0000000000000041 R09: 00000000022a03e0
[   47.415303] R10: 0000000000000040 R11: 0000000000000206 R12: 00007ffd995ff4f8
[   47.415351] R13: 00007ffd995ff578 R14: 00007ffd995feff8 R15: 0000000000543540
[   47.415396]  </TASK>
[   47.415411] ---[ end trace 0000000000000000 ]---
[   47.419877] ------------[ cut here ]------------
[   47.419954] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: kworker/u16:1/64
[   47.420058] Modules linked in:
[   47.420121] CPU: 2 UID: 0 PID: 64 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.420222] Tainted: [W]=WARN
[   47.420281] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.420362] Workqueue: netns cleanup_net
[   47.420426] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.420496] 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
[   47.420637] RSP: 0018:ff5eed0340237c78 EFLAGS: 00010286
[   47.420713] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.420794] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff1d22b3c1d7b100
[   47.420877] RBP: 0000000000000000 R08: ff1d22b3c3359a90 R09: ff1d22b3c46db02c
[   47.420958] R10: ff1d22b3c19c5118 R11: fefefefefefefeff R12: 0000000000000000
[   47.421040] R13: 0000000000000011 R14: ff1d22b3c19c5000 R15: ff1d22b3c1d7b100
[   47.421124] FS:  0000000000000000(0000) GS:ff1d22b468396000(0000) knlGS:0000000000000000
[   47.421210] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.421284] CR2: 00007f5ab9a5cf98 CR3: 0000000011842006 CR4: 0000000000771ef0
[   47.421374] PKRU: 55555554
[   47.421426] Call Trace:
[   47.421479]  <TASK>
[   47.421531]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.421602]  default_device_exit_batch+0x318/0x390
[   47.421671]  ops_undo_list+0x10b/0x240
[   47.421741]  cleanup_net+0x1d7/0x2e0
[   47.421803]  process_one_work+0x162/0x360
[   47.421866]  worker_thread+0x16e/0x2d0
[   47.421928]  ? rescuer_thread+0x510/0x510
[   47.421990]  kthread+0xe1/0x120
[   47.422051]  ? kthread_park+0xa0/0xa0
[   47.422113]  ret_from_fork+0x16d/0x250
[   47.422175]  ? kthread_park+0xa0/0xa0
[   47.422236]  ret_from_fork_asm+0x11/0x20
[   47.422300]  </TASK>
[   47.422358] ---[ end trace 0000000000000000 ]---