[    2.325804] ------------[ cut here ]------------
[    2.325922] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/158
[    2.326007] Modules linked in:
[    2.326067] CPU: 2 UID: 0 PID: 158 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.326162] Tainted: [W]=WARN
[    2.326244] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.326318] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.326397] 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
[    2.326570] RSP: 0018:ff4c597e8040fcc8 EFLAGS: 00010286
[    2.326668] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.326794] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917500
[    2.326871] RBP: 0000000000000000 R08: ff18ef5941de3690 R09: ff18ef59437fa02c
[    2.326959] R10: ff18ef594343d118 R11: fefefefefefefeff R12: 0000000000000000
[    2.327036] R13: 0000000000000010 R14: ff18ef594343d000 R15: ff18ef5941917500
[    2.327116] FS:  00007fe989a89740(0000) GS:ff18ef59e7f96000(0000) knlGS:0000000000000000
[    2.327207] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.327279] CR2: 000055c684e96310 CR3: 000000000366b003 CR4: 0000000000771ef0
[    2.327356] PKRU: 55555554
[    2.327415] Call Trace:
[    2.327467]  <TASK>
[    2.327519]  rtmsg_ifinfo+0x3c/0xa0
[    2.327580]  register_netdevice+0x889/0x9f0
[    2.327643]  register_netdev+0x1e/0x30
[    2.327705]  loopback_net_init+0x57/0xb0
[    2.327769]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.327837]  ops_init+0x68/0x140
[    2.327901]  setup_net+0x85/0x150
[    2.327963]  copy_net_ns+0xf5/0x200
[    2.328024]  create_new_namespaces+0x117/0x2f0
[    2.328095]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.328161]  ksys_unshare+0x346/0x5e0
[    2.328235]  __x64_sys_unshare+0x12/0x20
[    2.328297]  do_syscall_64+0x104/0xfc0
[    2.328367]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.328436] RIP: 0033:0x7fe989b84bcb
[    2.328497] 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
[    2.328615] RSP: 002b:00007ffdf5a88f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.328696] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe989b84bcb
[    2.328773] RDX: 0000000000000000 RSI: 00007ffdf5a88ca0 RDI: 0000000040000000
[    2.328853] RBP: 00007ffdf5a892c0 R08: 00007ffdf5a88e90 R09: 0000000000000000
[    2.328962] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.329046] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055c684e99b68
[    2.329121]  </TASK>
[    2.329175] ---[ end trace 0000000000000000 ]---
[    2.332528] ------------[ cut here ]------------
[    2.332589] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
[    2.332678] Modules linked in:
[    2.332734] CPU: 2 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.332825] Tainted: [W]=WARN
[    2.332883] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.332954] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.333022] 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
[    2.333145] RSP: 0018:ff4c597e8040fd68 EFLAGS: 00010286
[    2.333216] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.333296] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917500
[    2.333382] RBP: 0000000000000000 R08: ff18ef594324e510 R09: ff18ef59437ff030
[    2.333460] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[    2.333538] R13: 0000000000000010 R14: ff18ef5943704000 R15: ff18ef5941917500
[    2.333616] FS:  000000002aee6400(0000) GS:ff18ef59e7f96000(0000) knlGS:0000000000000000
[    2.333696] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.333767] CR2: 00007f87e81a7000 CR3: 0000000001980004 CR4: 0000000000771ef0
[    2.333847] PKRU: 55555554
[    2.333898] Call Trace:
[    2.333950]  <TASK>
[    2.334001]  rtmsg_ifinfo+0x3c/0xa0
[    2.334062]  register_netdevice+0x889/0x9f0
[    2.334122]  __tun_chr_ioctl+0x83c/0x16c0
[    2.334191]  ? do_sys_openat2+0x9a/0xe0
[    2.334255]  __x64_sys_ioctl+0xa1/0xe0
[    2.334319]  do_syscall_64+0x104/0xfc0
[    2.334386]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.334455] RIP: 0033:0x47cc8d
[    2.334516] 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
[    2.334641] RSP: 002b:00007ffc0dd7faf0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.334719] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.334798] RDX: 00007ffc0dd7fb70 RSI: 00000000400454ca RDI: 0000000000000005
[    2.334875] RBP: 00007ffc0dd7fb40 R08: 0000000000000000 R09: 0000000000000000
[    2.334954] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc0dd80048
[    2.335035] R13: 00007ffc0dd800c8 R14: 0000000000000002 R15: 0000000000543540
[    2.335117]  </TASK>
[    2.335172] ---[ end trace 0000000000000000 ]---
[    2.335260] ------------[ cut here ]------------
[    2.335325] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
[    2.335409] Modules linked in:
[    2.335469] CPU: 2 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.335557] Tainted: [W]=WARN
[    2.335612] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.335685] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.335748] 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
[    2.335874] RSP: 0018:ff4c597e8040fd60 EFLAGS: 00010286
[    2.335941] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.336013] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917500
[    2.336095] RBP: 0000000000000002 R08: ff18ef594324e510 R09: ff18ef59437ff030
[    2.336178] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[    2.336259] R13: 0000000000000010 R14: ff18ef5943704000 R15: ff18ef5941917500
[    2.336339] FS:  000000002aee6400(0000) GS:ff18ef59e7f96000(0000) knlGS:0000000000000000
[    2.336422] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.336493] CR2: 00007f87e81a7000 CR3: 0000000001980004 CR4: 0000000000771ef0
[    2.336572] PKRU: 55555554
[    2.336623] Call Trace:
[    2.336674]  <TASK>
[    2.336726]  rtnetlink_event+0x6e/0xb0
[    2.336787]  notifier_call_chain+0x6d/0x100
[    2.336850]  netdev_update_features+0x56/0x60
[    2.336917]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.336979]  ? file_init_path+0x62/0x120
[    2.337040]  __x64_sys_ioctl+0xa1/0xe0
[    2.337101]  do_syscall_64+0x104/0xfc0
[    2.337163]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.337239] RIP: 0033:0x47cc8d
[    2.337300] 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
[    2.337432] RSP: 002b:00007ffc0dd7fb30 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.337512] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.337589] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.337667] RBP: 00007ffc0dd7fb80 R08: 0000000000000000 R09: 0000000000000000
[    2.337747] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc0dd80048
[    2.337827] R13: 00007ffc0dd800c8 R14: 0000000000000002 R15: 0000000000543540
[    2.337905]  </TASK>
[    2.337955] ---[ end trace 0000000000000000 ]---
[    2.338040] ------------[ cut here ]------------
[    2.338104] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/158
[    2.338197] Modules linked in:
[    2.338257] CPU: 2 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.338347] Tainted: [W]=WARN
[    2.338409] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.338478] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.338550] 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
[    2.338669] RSP: 0018:ff4c597e8040fc10 EFLAGS: 00010286
[    2.338737] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.338814] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917500
[    2.338892] RBP: 0000000000000000 R08: ff18ef594324e510 R09: ff18ef59437fc030
[    2.338970] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[    2.339050] R13: 0000000000000010 R14: ff18ef5943704000 R15: ff18ef5941917500
[    2.339132] FS:  000000002aee6400(0000) GS:ff18ef59e7f96000(0000) knlGS:0000000000000000
[    2.339216] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.339289] CR2: 00007f87e81a7000 CR3: 0000000001980004 CR4: 0000000000771ef0
[    2.339375] PKRU: 55555554
[    2.339427] Call Trace:
[    2.339478]  <TASK>
[    2.339529]  rtmsg_ifinfo+0x3c/0xa0
[    2.339587]  __dev_notify_flags+0xb1/0xf0
[    2.339649]  netif_change_flags+0x54/0x70
[    2.339712]  dev_change_flags+0x45/0x80
[    2.339773]  devinet_ioctl+0x607/0x7f0
[    2.339838]  inet_ioctl+0x229/0x240
[    2.339901]  ? __rtnl_unlock+0x35/0x60
[    2.339963]  sock_do_ioctl+0x75/0x140
[    2.340027]  __x64_sys_ioctl+0xa1/0xe0
[    2.340090]  do_syscall_64+0x104/0xfc0
[    2.340153]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.340224] RIP: 0033:0x47cc8d
[    2.340283] 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
[    2.340416] RSP: 002b:00007ffc0dd7fb10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.340488] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.340569] RDX: 00007ffc0dd7fb80 RSI: 0000000000008914 RDI: 0000000000000006
[    2.340647] RBP: 00007ffc0dd7fb60 R08: 0000000000000000 R09: 0000000000000000
[    2.340725] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc0dd80048
[    2.340802] R13: 00007ffc0dd800c8 R14: 0000000000000002 R15: 0000000000543540
[    2.340881]  </TASK>
[    2.340932] ---[ end trace 0000000000000000 ]---
[   47.307699] ------------[ cut here ]------------
[   47.307788] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/158
[   47.307856] Modules linked in:
[   47.307886] CPU: 3 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.307948] Tainted: [W]=WARN
[   47.307969] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.308005] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.308040] 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
[   47.308134] RSP: 0018:ff4c597e8040fb58 EFLAGS: 00010286
[   47.308164] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.308214] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917600
[   47.308262] RBP: 0000000000000000 R08: ff18ef594324e510 R09: ff18ef5941c9b030
[   47.308315] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[   47.308364] R13: 0000000000000010 R14: ff18ef5943704000 R15: ff18ef5941917600
[   47.308412] FS:  0000000000000000(0000) GS:ff18ef59e8016000(0000) knlGS:0000000000000000
[   47.308459] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.308497] CR2: 0000561b6d5492a0 CR3: 0000000028c42003 CR4: 0000000000771ef0
[   47.308540] PKRU: 55555554
[   47.308553] Call Trace:
[   47.308572]  <TASK>
[   47.308587]  rtmsg_ifinfo+0x3c/0xa0
[   47.308610]  netif_close_many+0xed/0x190
[   47.308641]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.308672]  ? __queue_work+0x141/0x550
[   47.308696]  unregister_netdevice_queue+0x9e/0xd0
[   47.308724]  __tun_detach+0x591/0x5b0
[   47.308748]  tun_chr_close+0x3f/0xc0
[   47.308771]  __fput+0xe8/0x2c0
[   47.308796]  task_work_run+0x63/0xa0
[   47.308818]  do_exit+0x2c1/0xba0
[   47.308846]  ? sysvec_reschedule_ipi+0x25/0x120
[   47.308879]  do_group_exit+0x2d/0xc0
[   47.308899]  get_signal+0x82e/0x900
[   47.308919]  arch_do_signal_or_restart+0x77/0x2b0
[   47.308951]  exit_to_user_mode_loop+0x75/0x4a0
[   47.308983]  do_syscall_64+0x439/0xfc0
[   47.309006]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.309032] RIP: 0033:0x4c2d9e
[   47.309056] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.309090] RSP: 002b:00007ffc0dd7f4a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.309134] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.309175] RDX: 0000000000000014 RSI: 00007ffc0dd7f580 RDI: 0000000000000007
[   47.309216] RBP: 00007ffc0dd7f4b0 R08: 00007ffc0dd7f540 R09: 000000000000000c
[   47.309258] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc0dd80048
[   47.309300] R13: 00007ffc0dd800c8 R14: 00007ffc0dd7f670 R15: 0000000000543540
[   47.309350]  </TASK>
[   47.309369] ---[ end trace 0000000000000000 ]---
[   47.309679] ------------[ cut here ]------------
[   47.309736] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/158
[   47.309786] Modules linked in:
[   47.309811] CPU: 3 UID: 0 PID: 158 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.309866] Tainted: [W]=WARN
[   47.309885] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.309921] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.309955] 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
[   47.310040] RSP: 0018:ff4c597e8040fbc8 EFLAGS: 00010286
[   47.310067] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.310108] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5941917600
[   47.310147] RBP: 0000000000000000 R08: ff18ef594324e510 R09: ff18ef5946003830
[   47.310188] R10: ff18ef5943704118 R11: fefefefefefefeff R12: 0000000000000000
[   47.310228] R13: 0000000000000011 R14: ff18ef5943704000 R15: ff18ef5941917600
[   47.310272] FS:  0000000000000000(0000) GS:ff18ef59e8016000(0000) knlGS:0000000000000000
[   47.310319] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.310353] CR2: 0000557e871754c0 CR3: 00000000030be006 CR4: 0000000000771ef0
[   47.310399] PKRU: 55555554
[   47.310414] Call Trace:
[   47.310435]  <TASK>
[   47.310451]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.310479]  unregister_netdevice_queue+0x9e/0xd0
[   47.310512]  __tun_detach+0x591/0x5b0
[   47.310534]  tun_chr_close+0x3f/0xc0
[   47.310557]  __fput+0xe8/0x2c0
[   47.310579]  task_work_run+0x63/0xa0
[   47.310601]  do_exit+0x2c1/0xba0
[   47.310623]  ? sysvec_reschedule_ipi+0x25/0x120
[   47.310650]  do_group_exit+0x2d/0xc0
[   47.310671]  get_signal+0x82e/0x900
[   47.310693]  arch_do_signal_or_restart+0x77/0x2b0
[   47.310728]  exit_to_user_mode_loop+0x75/0x4a0
[   47.310756]  do_syscall_64+0x439/0xfc0
[   47.310776]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.310803] RIP: 0033:0x4c2d9e
[   47.310824] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.310858] RSP: 002b:00007ffc0dd7f4a0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.310897] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.310934] RDX: 0000000000000014 RSI: 00007ffc0dd7f580 RDI: 0000000000000007
[   47.310973] RBP: 00007ffc0dd7f4b0 R08: 00007ffc0dd7f540 R09: 000000000000000c
[   47.311018] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc0dd80048
[   47.311059] R13: 00007ffc0dd800c8 R14: 00007ffc0dd7f670 R15: 0000000000543540
[   47.311099]  </TASK>
[   47.311115] ---[ end trace 0000000000000000 ]---
[   47.318477] ------------[ cut here ]------------
[   47.318523] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[   47.318584] Modules linked in:
[   47.318607] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.318659] Tainted: [W]=WARN
[   47.318679] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.318715] Workqueue: netns cleanup_net
[   47.318740] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.318769] 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
[   47.318858] RSP: 0018:ff4c597e8023fc78 EFLAGS: 00010286
[   47.318886] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.318925] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff18ef5942e99400
[   47.318965] RBP: 0000000000000000 R08: ff18ef5941de3690 R09: ff18ef59419be82c
[   47.319004] R10: ff18ef594343d118 R11: fefefefefefefeff R12: 0000000000000000
[   47.319043] R13: 0000000000000011 R14: ff18ef594343d000 R15: ff18ef5942e99400
[   47.319086] FS:  0000000000000000(0000) GS:ff18ef59e7e96000(0000) knlGS:0000000000000000
[   47.319127] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.319161] CR2: 000055ef70af12b8 CR3: 0000000002efb005 CR4: 0000000000771ef0
[   47.319202] PKRU: 55555554
[   47.319216] Call Trace:
[   47.319230]  <TASK>
[   47.319242]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.319272]  default_device_exit_batch+0x318/0x390
[   47.319300]  ops_undo_list+0x10b/0x240
[   47.319326]  cleanup_net+0x1d7/0x2e0
[   47.319349]  process_one_work+0x162/0x360
[   47.319377]  worker_thread+0x16e/0x2d0
[   47.319399]  ? rescuer_thread+0x510/0x510
[   47.319421]  kthread+0xe1/0x120
[   47.319444]  ? kthread_park+0xa0/0xa0
[   47.319468]  ret_from_fork+0x16d/0x250
[   47.319490]  ? kthread_park+0xa0/0xa0
[   47.319511]  ret_from_fork_asm+0x11/0x20
[   47.319535]  </TASK>
[   47.319548] ---[ end trace 0000000000000000 ]---