[   48.049157] ------------[ cut here ]------------
[   48.049246] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/204
[   48.049343] Modules linked in:
[   48.049404] CPU: 2 UID: 0 PID: 204 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   48.049548] Tainted: [W]=WARN
[   48.049606] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   48.049681] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   48.049749] 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
[   48.049891] RSP: 0018:ff4793520046fcc8 EFLAGS: 00010286
[   48.049959] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   48.050077] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa742fa9d00
[   48.050169] RBP: 0000000000000000 R08: ff201fa7433d9590 R09: ff201fa74113002c
[   48.050255] R10: ff201fa742ea7118 R11: fefefefefefefeff R12: 0000000000000000
[   48.050336] R13: 0000000000000010 R14: ff201fa742ea7000 R15: ff201fa742fa9d00
[   48.050421] FS:  00007f9f122a0740(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[   48.050513] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.050589] CR2: 00007f9f12462280 CR3: 0000000004607005 CR4: 0000000000771ef0
[   48.050675] PKRU: 55555554
[   48.050706] Call Trace:
[   48.050755]  <TASK>
[   48.050810]  rtmsg_ifinfo+0x3c/0xa0
[   48.050873]  register_netdevice+0x889/0x9f0
[   48.050971]  register_netdev+0x1e/0x30
[   48.051032]  loopback_net_init+0x57/0xb0
[   48.051135]  ? vsock_sysctl_init_net+0xb6/0x140
[   48.051240]  ops_init+0x68/0x140
[   48.051304]  setup_net+0x85/0x150
[   48.051367]  copy_net_ns+0xf5/0x200
[   48.051429]  create_new_namespaces+0x117/0x2f0
[   48.051506]  unshare_nsproxy_namespaces+0x85/0xb0
[   48.051575]  ksys_unshare+0x346/0x5e0
[   48.051639]  __x64_sys_unshare+0x12/0x20
[   48.051699]  do_syscall_64+0x104/0xfc0
[   48.051756]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   48.051819] RIP: 0033:0x7f9f1239bbcb
[   48.051880] 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
[   48.052020] RSP: 002b:00007ffff2dda9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[   48.052108] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9f1239bbcb
[   48.052227] RDX: 0000000000000000 RSI: 00007ffff2dda760 RDI: 0000000040000000
[   48.052339] RBP: 00007ffff2ddad80 R08: 00007ffff2dda950 R09: 0000000000000000
[   48.052420] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[   48.052509] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055ddf9bd1b68
[   48.052590]  </TASK>
[   48.052641] ---[ end trace 0000000000000000 ]---
[   48.053433] ------------[ cut here ]------------
[   48.053511] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/204
[   48.053604] Modules linked in:
[   48.053666] CPU: 2 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   48.053761] Tainted: [W]=WARN
[   48.053820] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   48.053928] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   48.053998] 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
[   48.054137] RSP: 0018:ff4793520046fd68 EFLAGS: 00010286
[   48.054212] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   48.054293] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa742fa9d00
[   48.054409] RBP: 0000000000000000 R08: ff201fa743243810 R09: ff201fa744777030
[   48.054527] R10: ff201fa7446c0118 R11: fefefefefefefeff R12: 0000000000000000
[   48.054641] R13: 0000000000000010 R14: ff201fa7446c0000 R15: ff201fa742fa9d00
[   48.054733] FS:  00000000149cb400(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[   48.054856] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.054954] CR2: 00007f6ab347b000 CR3: 00000000030b3006 CR4: 0000000000771ef0
[   48.055069] PKRU: 55555554
[   48.055121] Call Trace:
[   48.055180]  <TASK>
[   48.055243]  rtmsg_ifinfo+0x3c/0xa0
[   48.055321]  register_netdevice+0x889/0x9f0
[   48.055386]  __tun_chr_ioctl+0x83c/0x16c0
[   48.055458]  ? do_sys_openat2+0x9a/0xe0
[   48.055539]  __x64_sys_ioctl+0xa1/0xe0
[   48.055621]  do_syscall_64+0x104/0xfc0
[   48.055689]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   48.055766] RIP: 0033:0x47cc8d
[   48.055843] 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
[   48.056000] RSP: 002b:00007ffc1c0dbd20 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   48.056091] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   48.056178] RDX: 00007ffc1c0dbda0 RSI: 00000000400454ca RDI: 0000000000000005
[   48.056258] RBP: 00007ffc1c0dbd70 R08: 0000000000000000 R09: 0000000000000000
[   48.056341] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc1c0dc278
[   48.056425] R13: 00007ffc1c0dc2f8 R14: 0000000000000002 R15: 0000000000543540
[   48.056514]  </TASK>
[   48.056566] ---[ end trace 0000000000000000 ]---
[   48.056662] ------------[ cut here ]------------
[   48.056728] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/204
[   48.056840] Modules linked in:
[   48.056905] CPU: 2 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   48.057004] Tainted: [W]=WARN
[   48.057062] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   48.057138] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   48.057213] 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
[   48.057351] RSP: 0018:ff4793520046fd60 EFLAGS: 00010286
[   48.057418] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[   48.057505] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa742fa9d00
[   48.057585] RBP: 0000000000000002 R08: ff201fa743243810 R09: ff201fa744777030
[   48.057666] R10: ff201fa7446c0118 R11: fefefefefefefeff R12: 0000000000000000
[   48.057746] R13: 0000000000000010 R14: ff201fa7446c0000 R15: ff201fa742fa9d00
[   48.057833] FS:  00000000149cb400(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[   48.057918] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.057990] CR2: 00007f6ab347b000 CR3: 00000000030b3006 CR4: 0000000000771ef0
[   48.058071] PKRU: 55555554
[   48.058124] Call Trace:
[   48.058182]  <TASK>
[   48.058235]  rtnetlink_event+0x6e/0xb0
[   48.058297]  notifier_call_chain+0x6d/0x100
[   48.058358]  netdev_update_features+0x56/0x60
[   48.058427]  __tun_chr_ioctl+0xbf1/0x16c0
[   48.058488]  ? file_init_path+0x62/0x120
[   48.058561]  __x64_sys_ioctl+0xa1/0xe0
[   48.058620]  do_syscall_64+0x104/0xfc0
[   48.058680]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   48.058759] RIP: 0033:0x47cc8d
[   48.058819] 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
[   48.058956] RSP: 002b:00007ffc1c0dbd60 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   48.059038] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   48.059118] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[   48.059206] RBP: 00007ffc1c0dbdb0 R08: 0000000000000000 R09: 0000000000000000
[   48.059288] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc1c0dc278
[   48.059368] R13: 00007ffc1c0dc2f8 R14: 0000000000000002 R15: 0000000000543540
[   48.059449]  </TASK>
[   48.059508] ---[ end trace 0000000000000000 ]---
[   48.059601] ------------[ cut here ]------------
[   48.059666] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/204
[   48.059758] Modules linked in:
[   48.059818] CPU: 2 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   48.059915] Tainted: [W]=WARN
[   48.059973] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   48.060047] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   48.060115] 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
[   48.060259] RSP: 0018:ff4793520046fc10 EFLAGS: 00010286
[   48.060326] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[   48.060416] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa742fa9d00
[   48.060503] RBP: 0000000000000000 R08: ff201fa743243810 R09: ff201fa7470ea030
[   48.060583] R10: ff201fa7446c0118 R11: fefefefefefefeff R12: 0000000000000000
[   48.060664] R13: 0000000000000010 R14: ff201fa7446c0000 R15: ff201fa742fa9d00
[   48.060748] FS:  00000000149cb400(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[   48.060834] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.060910] CR2: 00007f6ab347b000 CR3: 00000000030b3006 CR4: 0000000000771ef0
[   48.060993] PKRU: 55555554
[   48.061044] Call Trace:
[   48.061096]  <TASK>
[   48.061157]  rtmsg_ifinfo+0x3c/0xa0
[   48.061217]  __dev_notify_flags+0xb1/0xf0
[   48.061279]  netif_change_flags+0x54/0x70
[   48.061339]  dev_change_flags+0x45/0x80
[   48.061399]  devinet_ioctl+0x607/0x7f0
[   48.061462]  inet_ioctl+0x229/0x240
[   48.061527]  ? __rtnl_unlock+0x35/0x60
[   48.061587]  sock_do_ioctl+0x75/0x140
[   48.061649]  __x64_sys_ioctl+0xa1/0xe0
[   48.061710]  do_syscall_64+0x104/0xfc0
[   48.061770]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   48.061837] RIP: 0033:0x47cc8d
[   48.061897] 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
[   48.062036] RSP: 002b:00007ffc1c0dbd40 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   48.062117] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   48.062202] RDX: 00007ffc1c0dbdb0 RSI: 0000000000008914 RDI: 0000000000000006
[   48.062281] RBP: 00007ffc1c0dbd90 R08: 0000000000000000 R09: 0000000000000000
[   48.062362] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc1c0dc278
[   48.062443] R13: 00007ffc1c0dc2f8 R14: 0000000000000002 R15: 0000000000543540
[   48.062528]  </TASK>
[   48.062580] ---[ end trace 0000000000000000 ]---
[   93.034736] ------------[ cut here ]------------
[   93.034917] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/204
[   93.035011] Modules linked in:
[   93.035109] CPU: 2 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.035210] Tainted: [W]=WARN
[   93.035270] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.035345] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.035830] 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
[   93.035975] RSP: 0018:ff4793520046fb58 EFLAGS: 00010286
[   93.036043] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   93.036125] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa74314c800
[   93.036207] RBP: 0000000000000000 R08: ff201fa743243810 R09: ff201fa7470ea030
[   93.036289] R10: ff201fa7446c0118 R11: fefefefefefefeff R12: 0000000000000000
[   93.036377] R13: 0000000000000010 R14: ff201fa7446c0000 R15: ff201fa74314c800
[   93.036464] FS:  0000000000000000(0000) GS:ff201fa7e8996000(0000) knlGS:0000000000000000
[   93.036552] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.036627] CR2: 00007f6ab347b000 CR3: 000000001b042001 CR4: 0000000000771ef0
[   93.036710] PKRU: 55555554
[   93.036763] Call Trace:
[   93.036817]  <TASK>
[   93.036869]  rtmsg_ifinfo+0x3c/0xa0
[   93.036930]  netif_close_many+0xed/0x190
[   93.036993]  unregister_netdevice_many_notify+0x267/0x9d0
[   93.037061]  ? __queue_work+0x141/0x550
[   93.037125]  unregister_netdevice_queue+0x9e/0xd0
[   93.037194]  __tun_detach+0x591/0x5b0
[   93.037259]  tun_chr_close+0x3f/0xc0
[   93.037321]  __fput+0xe8/0x2c0
[   93.037392]  task_work_run+0x63/0xa0
[   93.037454]  do_exit+0x2c1/0xba0
[   93.037525]  ? netlink_dump+0x336/0x450
[   93.037588]  do_group_exit+0x2d/0xc0
[   93.037650]  get_signal+0x82e/0x900
[   93.037713]  arch_do_signal_or_restart+0x77/0x2b0
[   93.037803]  exit_to_user_mode_loop+0x75/0x4a0
[   93.037874]  do_syscall_64+0x439/0xfc0
[   93.037937]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.038005] RIP: 0033:0x4c2d9e
[   93.038066] Code: Unable to access opcode bytes at 0x4c2d74.
[   93.038139] RSP: 002b:00007ffc1c0db6d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   93.038222] RAX: 0000000000000050 RBX: 00007ffc1c0db760 RCX: 00000000004c2d9e
[   93.038303] RDX: 0000000000000000 RSI: 00007ffc1c0db770 RDI: 0000000000000007
[   93.038391] RBP: 00007ffc1c0db6e0 R08: 0000000000000000 R09: 0000000000000000
[   93.038473] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc1c0db754
[   93.038558] R13: 00007ffc1c0dc2f8 R14: 00007ffc1c0db8a0 R15: 0000000000543540
[   93.038640]  </TASK>
[   93.038692] ---[ end trace 0000000000000000 ]---
[   93.038858] ------------[ cut here ]------------
[   93.038894] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/204
[   93.038954] Modules linked in:
[   93.038980] CPU: 0 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.039044] Tainted: [W]=WARN
[   93.039067] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.039105] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.039140] 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
[   93.039247] RSP: 0018:ff4793520046fbc8 EFLAGS: 00010286
[   93.039275] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.039318] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa742faa300
[   93.039366] RBP: 0000000000000000 R08: ff201fa743243810 R09: ff201fa747253030
[   93.039408] R10: ff201fa7446c0118 R11: fefefefefefefeff R12: 0000000000000000
[   93.039452] R13: 0000000000000011 R14: ff201fa7446c0000 R15: ff201fa742faa300
[   93.039501] FS:  0000000000000000(0000) GS:ff201fa7e8896000(0000) knlGS:0000000000000000
[   93.039550] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.039599] CR2: 00007f0f35188620 CR3: 00000000033be003 CR4: 0000000000771ef0
[   93.039643] PKRU: 55555554
[   93.039658] Call Trace:
[   93.039673]  <TASK>
[   93.039689]  unregister_netdevice_many_notify+0x877/0x9d0
[   93.039727]  unregister_netdevice_queue+0x9e/0xd0
[   93.039757]  __tun_detach+0x591/0x5b0
[   93.039783]  tun_chr_close+0x3f/0xc0
[   93.039806]  __fput+0xe8/0x2c0
[   93.039831]  task_work_run+0x63/0xa0
[   93.039854]  do_exit+0x2c1/0xba0
[   93.039874]  ? netlink_dump+0x336/0x450
[   93.039896]  do_group_exit+0x2d/0xc0
[   93.039919]  get_signal+0x82e/0x900
[   93.039944]  arch_do_signal_or_restart+0x77/0x2b0
[   93.039972]  exit_to_user_mode_loop+0x75/0x4a0
[   93.040002]  do_syscall_64+0x439/0xfc0
[   93.040026]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   93.040058] RIP: 0033:0x4c2d9e
[   93.040080] Code: Unable to access opcode bytes at 0x4c2d74.
[   93.040114] RSP: 002b:00007ffc1c0db6d0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[   93.040156] RAX: 0000000000000050 RBX: 00007ffc1c0db760 RCX: 00000000004c2d9e
[   93.040200] RDX: 0000000000000000 RSI: 00007ffc1c0db770 RDI: 0000000000000007
[   93.040242] RBP: 00007ffc1c0db6e0 R08: 0000000000000000 R09: 0000000000000000
[   93.040287] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc1c0db754
[   93.040335] R13: 00007ffc1c0dc2f8 R14: 00007ffc1c0db8a0 R15: 0000000000543540
[   93.040388]  </TASK>
[   93.040404] ---[ end trace 0000000000000000 ]---
[   93.049635] ------------[ cut here ]------------
[   93.049672] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:0/12
[   93.049732] Modules linked in:
[   93.049755] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   93.049804] Tainted: [W]=WARN
[   93.049826] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   93.049865] Workqueue: netns cleanup_net
[   93.049890] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   93.049920] 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
[   93.050021] RSP: 0018:ff47935200067c78 EFLAGS: 00010286
[   93.050050] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   93.050095] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff201fa742faa300
[   93.050140] RBP: 0000000000000000 R08: ff201fa7433d9590 R09: ff201fa74725702c
[   93.050184] R10: ff201fa742ea7118 R11: fefefefefefefeff R12: 0000000000000000
[   93.050229] R13: 0000000000000011 R14: ff201fa742ea7000 R15: ff201fa742faa300
[   93.050278] FS:  0000000000000000(0000) GS:ff201fa7e8896000(0000) knlGS:0000000000000000
[   93.050325] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   93.050360] CR2: 000055c453f232b8 CR3: 0000000002ee3001 CR4: 0000000000771ef0
[   93.050412] PKRU: 55555554
[   93.050427] Call Trace:
[   93.050442]  <TASK>
[   93.050458]  unregister_netdevice_many_notify+0x877/0x9d0
[   93.050496]  default_device_exit_batch+0x318/0x390
[   93.050525]  ops_undo_list+0x10b/0x240
[   93.050550]  cleanup_net+0x1d7/0x2e0
[   93.050575]  process_one_work+0x162/0x360
[   93.050601]  worker_thread+0x16e/0x2d0
[   93.050624]  ? rescuer_thread+0x510/0x510
[   93.050646]  kthread+0xe1/0x120
[   93.050668]  ? kthread_park+0xa0/0xa0
[   93.050690]  ret_from_fork+0x16d/0x250
[   93.050714]  ? kthread_park+0xa0/0xa0
[   93.050736]  ret_from_fork_asm+0x11/0x20
[   93.050756]  </TASK>
[   93.050771] ---[ end trace 0000000000000000 ]---