[  502.374201] ------------[ cut here ]------------
[  502.374293] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/645
[  502.374385] Modules linked in:
[  502.374443] CPU: 2 UID: 0 PID: 645 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  502.374537] Tainted: [W]=WARN
[  502.374592] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  502.374662] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  502.374726] 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
[  502.374873] RSP: 0018:ff77a99b809c7cc8 EFLAGS: 00010286
[  502.374938] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  502.375016] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81926d00
[  502.375097] RBP: 0000000000000000 R08: ff2556dc82b92310 R09: ff2556dc86a9a02c
[  502.375174] R10: ff2556dc81130118 R11: fefefefefefefeff R12: 0000000000000000
[  502.375252] R13: 0000000000000010 R14: ff2556dc81130000 R15: ff2556dc81926d00
[  502.375334] FS:  00007f3fce8ea740(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  502.375413] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  502.375482] CR2: 0000557e2982b008 CR3: 0000000002b8f005 CR4: 0000000000771ef0
[  502.375561] PKRU: 55555554
[  502.375609] Call Trace:
[  502.375659]  <TASK>
[  502.375709]  rtmsg_ifinfo+0x3c/0xa0
[  502.375766]  register_netdevice+0x889/0x9f0
[  502.375831]  register_netdev+0x1e/0x30
[  502.375888]  loopback_net_init+0x57/0xb0
[  502.375948]  ? vsock_sysctl_init_net+0xb6/0x140
[  502.376021]  ops_init+0x68/0x140
[  502.376085]  setup_net+0x85/0x150
[  502.376143]  copy_net_ns+0xf5/0x200
[  502.376202]  create_new_namespaces+0x117/0x2f0
[  502.376283]  unshare_nsproxy_namespaces+0x85/0xb0
[  502.376348]  ksys_unshare+0x346/0x5e0
[  502.376408]  __x64_sys_unshare+0x12/0x20
[  502.376464]  do_syscall_64+0x104/0xfc0
[  502.376523]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  502.376588] RIP: 0033:0x7f3fce9e5bcb
[  502.376645] 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
[  502.376779] RSP: 002b:00007ffc7bedb878 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  502.376863] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3fce9e5bcb
[  502.376941] RDX: 0000000000000000 RSI: 00007ffc7bedb5e0 RDI: 0000000040000000
[  502.377018] RBP: 00007ffc7bedbc00 R08: 00007ffc7bedb7d0 R09: 0000000000000000
[  502.377104] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  502.377181] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000557df1988b68
[  502.377260]  </TASK>
[  502.377308] ---[ end trace 0000000000000000 ]---
[  502.378004] ------------[ cut here ]------------
[  502.378076] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/645
[  502.378164] Modules linked in:
[  502.378221] CPU: 2 UID: 0 PID: 645 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  502.378315] Tainted: [W]=WARN
[  502.378370] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  502.378440] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  502.378503] 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
[  502.378637] RSP: 0018:ff77a99b809c7d68 EFLAGS: 00010286
[  502.378701] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  502.378777] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81926d00
[  502.378869] RBP: 0000000000000000 R08: ff2556dc82b9fa10 R09: ff2556dc86a9b030
[  502.378946] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  502.379022] R13: 0000000000000010 R14: ff2556dc8322c000 R15: ff2556dc81926d00
[  502.379112] FS:  0000000003975400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  502.379191] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  502.379263] CR2: 00007ff7bdc3b000 CR3: 0000000009eb3006 CR4: 0000000000771ef0
[  502.379341] PKRU: 55555554
[  502.379390] Call Trace:
[  502.379438]  <TASK>
[  502.379488]  rtmsg_ifinfo+0x3c/0xa0
[  502.379545]  register_netdevice+0x889/0x9f0
[  502.379601]  __tun_chr_ioctl+0x83c/0x16c0
[  502.379661]  ? do_sys_openat2+0x9a/0xe0
[  502.379720]  __x64_sys_ioctl+0xa1/0xe0
[  502.379779]  do_syscall_64+0x104/0xfc0
[  502.379841]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  502.379906] RIP: 0033:0x47cc8d
[  502.379962] 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
[  502.380097] RSP: 002b:00007ffddfe87440 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  502.380176] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  502.380253] RDX: 00007ffddfe874c0 RSI: 00000000400454ca RDI: 0000000000000005
[  502.380330] RBP: 00007ffddfe87490 R08: 0000000000000000 R09: 0000000000000000
[  502.380406] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddfe87998
[  502.380482] R13: 00007ffddfe87a18 R14: 0000000000000002 R15: 0000000000543540
[  502.380559]  </TASK>
[  502.380607] ---[ end trace 0000000000000000 ]---
[  502.380689] ------------[ cut here ]------------
[  502.380752] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/645
[  502.380843] Modules linked in:
[  502.380899] CPU: 2 UID: 0 PID: 645 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  502.380990] Tainted: [W]=WARN
[  502.381045] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  502.381118] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  502.381181] 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
[  502.381312] RSP: 0018:ff77a99b809c7d60 EFLAGS: 00010286
[  502.381376] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  502.381453] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81926d00
[  502.381529] RBP: 0000000000000002 R08: ff2556dc82b9fa10 R09: ff2556dc86a9b030
[  502.381606] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  502.381682] R13: 0000000000000010 R14: ff2556dc8322c000 R15: ff2556dc81926d00
[  502.381761] FS:  0000000003975400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  502.381842] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  502.381914] CR2: 00007ff7bdc3b000 CR3: 0000000009eb3006 CR4: 0000000000771ef0
[  502.381992] PKRU: 55555554
[  502.382040] Call Trace:
[  502.382095]  <TASK>
[  502.382172]  rtnetlink_event+0x6e/0xb0
[  502.382231]  notifier_call_chain+0x6d/0x100
[  502.382289]  netdev_update_features+0x56/0x60
[  502.382355]  __tun_chr_ioctl+0xbf1/0x16c0
[  502.382412]  ? file_init_path+0x62/0x120
[  502.382471]  __x64_sys_ioctl+0xa1/0xe0
[  502.382528]  do_syscall_64+0x104/0xfc0
[  502.382586]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  502.382654] RIP: 0033:0x47cc8d
[  502.382709] 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
[  502.382847] RSP: 002b:00007ffddfe87480 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  502.382924] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  502.383001] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  502.383084] RBP: 00007ffddfe874d0 R08: 0000000000000000 R09: 0000000000000000
[  502.383161] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddfe87998
[  502.383237] R13: 00007ffddfe87a18 R14: 0000000000000002 R15: 0000000000543540
[  502.383316]  </TASK>
[  502.383364] ---[ end trace 0000000000000000 ]---
[  502.383446] ------------[ cut here ]------------
[  502.383509] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/645
[  502.383594] Modules linked in:
[  502.383650] CPU: 2 UID: 0 PID: 645 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  502.383741] Tainted: [W]=WARN
[  502.383807] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  502.383876] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  502.383939] 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
[  502.384079] RSP: 0018:ff77a99b809c7c10 EFLAGS: 00010286
[  502.384143] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  502.384220] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc81926d00
[  502.384297] RBP: 0000000000000000 R08: ff2556dc82b9fa10 R09: ff2556dc86a98030
[  502.384375] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  502.384452] R13: 0000000000000010 R14: ff2556dc8322c000 R15: ff2556dc81926d00
[  502.384532] FS:  0000000003975400(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  502.384610] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  502.384679] CR2: 00007ff7bdc3b000 CR3: 0000000009eb3006 CR4: 0000000000771ef0
[  502.384757] PKRU: 55555554
[  502.384810] Call Trace:
[  502.384858]  <TASK>
[  502.384908]  rtmsg_ifinfo+0x3c/0xa0
[  502.384965]  __dev_notify_flags+0xb1/0xf0
[  502.385022]  netif_change_flags+0x54/0x70
[  502.385085]  dev_change_flags+0x45/0x80
[  502.385142]  devinet_ioctl+0x607/0x7f0
[  502.385201]  inet_ioctl+0x229/0x240
[  502.385260]  ? __rtnl_unlock+0x35/0x60
[  502.385317]  sock_do_ioctl+0x75/0x140
[  502.385376]  __x64_sys_ioctl+0xa1/0xe0
[  502.385433]  do_syscall_64+0x104/0xfc0
[  502.385490]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  502.385554] RIP: 0033:0x47cc8d
[  502.385610] 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
[  502.385744] RSP: 002b:00007ffddfe87460 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  502.385829] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  502.385906] RDX: 00007ffddfe874d0 RSI: 0000000000008914 RDI: 0000000000000006
[  502.385982] RBP: 00007ffddfe874b0 R08: 0000000000000000 R09: 0000000000000000
[  502.386061] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddfe87998
[  502.386144] R13: 00007ffddfe87a18 R14: 0000000000000002 R15: 0000000000543540
[  502.386220]  </TASK>
[  502.386269] ---[ end trace 0000000000000000 ]---
[  547.360742] ------------[ cut here ]------------
[  547.360896] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/645
[  547.360990] Modules linked in:
[  547.361049] CPU: 2 UID: 0 PID: 645 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  547.361142] Tainted: [W]=WARN
[  547.361198] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.361283] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  547.361348] 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
[  547.361483] RSP: 0018:ff77a99b809c7b58 EFLAGS: 00010286
[  547.361548] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  547.361626] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1500
[  547.361703] RBP: 0000000000000000 R08: ff2556dc82b9fa10 R09: ff2556dc86ad7030
[  547.361780] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  547.361864] R13: 0000000000000010 R14: ff2556dc8322c000 R15: ff2556dc818e1500
[  547.361947] FS:  0000000000000000(0000) GS:ff2556dd07f96000(0000) knlGS:0000000000000000
[  547.362027] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.362097] CR2: 00007ff7bdc3b000 CR3: 0000000004a42001 CR4: 0000000000771ef0
[  547.362178] PKRU: 55555554
[  547.362227] Call Trace:
[  547.362283]  <TASK>
[  547.362333]  rtmsg_ifinfo+0x3c/0xa0
[  547.362391]  netif_close_many+0xed/0x190
[  547.362451]  unregister_netdevice_many_notify+0x267/0x9d0
[  547.362517]  ? __queue_work+0x141/0x550
[  547.362577]  unregister_netdevice_queue+0x9e/0xd0
[  547.362641]  __tun_detach+0x591/0x5b0
[  547.362702]  tun_chr_close+0x3f/0xc0
[  547.362759]  __fput+0xe8/0x2c0
[  547.362826]  task_work_run+0x63/0xa0
[  547.362884]  do_exit+0x2c1/0xba0
[  547.362943]  ? sysvec_reschedule_ipi+0x25/0x120
[  547.363013]  do_group_exit+0x2d/0xc0
[  547.363095]  get_signal+0x82e/0x900
[  547.363155]  arch_do_signal_or_restart+0x77/0x2b0
[  547.363250]  exit_to_user_mode_loop+0x75/0x4a0
[  547.363352]  do_syscall_64+0x439/0xfc0
[  547.363410]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  547.363477] RIP: 0033:0x4c2d9e
[  547.363536] Code: Unable to access opcode bytes at 0x4c2d74.
[  547.363607] RSP: 002b:00007ffddfe86df0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  547.363686] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  547.363763] RDX: 0000000000000014 RSI: 00007ffddfe86ed0 RDI: 0000000000000007
[  547.363875] RBP: 00007ffddfe86e00 R08: 00007ffddfe86e90 R09: 000000000000000c
[  547.363952] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffddfe87998
[  547.364029] R13: 00007ffddfe87a18 R14: 00007ffddfe86fc0 R15: 0000000000543540
[  547.364106]  </TASK>
[  547.364154] ---[ end trace 0000000000000000 ]---
[  547.364316] ------------[ cut here ]------------
[  547.364354] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/645
[  547.364409] Modules linked in:
[  547.364436] CPU: 3 UID: 0 PID: 645 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  547.364494] Tainted: [W]=WARN
[  547.364516] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.364555] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  547.364587] 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
[  547.364693] RSP: 0018:ff77a99b809c7bc8 EFLAGS: 00010286
[  547.364725] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  547.364774] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e5f00
[  547.364821] RBP: 0000000000000000 R08: ff2556dc82b9fa10 R09: ff2556dc88e15030
[  547.364865] R10: ff2556dc8322c118 R11: fefefefefefefeff R12: 0000000000000000
[  547.364905] R13: 0000000000000011 R14: ff2556dc8322c000 R15: ff2556dc818e5f00
[  547.364951] FS:  0000000000000000(0000) GS:ff2556dd08016000(0000) knlGS:0000000000000000
[  547.364996] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.365032] CR2: 00007f46eb825f98 CR3: 0000000004a42002 CR4: 0000000000771ef0
[  547.365073] PKRU: 55555554
[  547.365089] Call Trace:
[  547.365105]  <TASK>
[  547.365119]  unregister_netdevice_many_notify+0x877/0x9d0
[  547.365151]  unregister_netdevice_queue+0x9e/0xd0
[  547.365179]  __tun_detach+0x591/0x5b0
[  547.365203]  tun_chr_close+0x3f/0xc0
[  547.365226]  __fput+0xe8/0x2c0
[  547.365249]  task_work_run+0x63/0xa0
[  547.365276]  do_exit+0x2c1/0xba0
[  547.365300]  ? sysvec_reschedule_ipi+0x25/0x120
[  547.365325]  do_group_exit+0x2d/0xc0
[  547.365349]  get_signal+0x82e/0x900
[  547.365373]  arch_do_signal_or_restart+0x77/0x2b0
[  547.365404]  exit_to_user_mode_loop+0x75/0x4a0
[  547.365436]  do_syscall_64+0x439/0xfc0
[  547.365460]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  547.365488] RIP: 0033:0x4c2d9e
[  547.365512] Code: Unable to access opcode bytes at 0x4c2d74.
[  547.365544] RSP: 002b:00007ffddfe86df0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  547.365589] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[  547.365629] RDX: 0000000000000014 RSI: 00007ffddfe86ed0 RDI: 0000000000000007
[  547.365674] RBP: 00007ffddfe86e00 R08: 00007ffddfe86e90 R09: 000000000000000c
[  547.365719] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffddfe87998
[  547.365760] R13: 00007ffddfe87a18 R14: 00007ffddfe86fc0 R15: 0000000000543540
[  547.365805]  </TASK>
[  547.365824] ---[ end trace 0000000000000000 ]---
[  547.376107] ------------[ cut here ]------------
[  547.376150] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#1: kworker/u16:1/64
[  547.376209] Modules linked in:
[  547.376232] CPU: 1 UID: 0 PID: 64 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  547.376301] Tainted: [W]=WARN
[  547.376325] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.376365] Workqueue: netns cleanup_net
[  547.376391] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  547.376421] 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
[  547.376518] RSP: 0018:ff77a99b80237c78 EFLAGS: 00010286
[  547.376547] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  547.376589] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff2556dc818e1600
[  547.376632] RBP: 0000000000000000 R08: ff2556dc82b92310 R09: ff2556dc8692d82c
[  547.376678] R10: ff2556dc81130118 R11: fefefefefefefeff R12: 0000000000000000
[  547.376723] R13: 0000000000000011 R14: ff2556dc81130000 R15: ff2556dc818e1600
[  547.376765] FS:  0000000000000000(0000) GS:ff2556dd07f16000(0000) knlGS:0000000000000000
[  547.376815] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.376856] CR2: 00007f46eb807680 CR3: 0000000004a42002 CR4: 0000000000771ef0
[  547.376899] PKRU: 55555554
[  547.376915] Call Trace:
[  547.376928]  <TASK>
[  547.376945]  unregister_netdevice_many_notify+0x877/0x9d0
[  547.376973]  default_device_exit_batch+0x318/0x390
[  547.376998]  ops_undo_list+0x10b/0x240
[  547.377020]  cleanup_net+0x1d7/0x2e0
[  547.377044]  process_one_work+0x162/0x360
[  547.377071]  worker_thread+0x16e/0x2d0
[  547.377094]  ? rescuer_thread+0x510/0x510
[  547.377115]  kthread+0xe1/0x120
[  547.377138]  ? kthread_park+0xa0/0xa0
[  547.377158]  ret_from_fork+0x16d/0x250
[  547.377181]  ? kthread_park+0xa0/0xa0
[  547.377205]  ret_from_fork_asm+0x11/0x20
[  547.377229]  </TASK>
[  547.377242] ---[ end trace 0000000000000000 ]---