[    2.246011] ------------[ cut here ]------------
[    2.246062] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/159
[    2.246119] Modules linked in:
[    2.246142] CPU: 3 UID: 0 PID: 159 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.246212] Tainted: [W]=WARN
[    2.246241] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.246276] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.246308] 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
[    2.246408] RSP: 0018:ff2dcb53c03ffcc8 EFLAGS: 00010286
[    2.246435] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.246487] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff12f6e001926400
[    2.246529] RBP: 0000000000000000 R08: ff12f6e001ecb890 R09: ff12f6e006d2202c
[    2.246570] R10: ff12f6e00300d118 R11: fefefefefefefeff R12: 0000000000000000
[    2.246615] R13: 0000000000000010 R14: ff12f6e00300d000 R15: ff12f6e001926400
[    2.246656] FS:  00007fa8925cc740(0000) GS:ff12f6e0a6816000(0000) knlGS:0000000000000000
[    2.246692] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.246728] CR2: 000055fed7bd8310 CR3: 00000000033d8001 CR4: 0000000000771ef0
[    2.246772] PKRU: 55555554
[    2.246785] Call Trace:
[    2.246801]  <TASK>
[    2.246818]  rtmsg_ifinfo+0x3c/0xa0
[    2.246841]  register_netdevice+0x889/0x9f0
[    2.246864]  register_netdev+0x1e/0x30
[    2.246885]  loopback_net_init+0x57/0xb0
[    2.246913]  ? vsock_sysctl_init_net+0xb6/0x140
[    2.246937]  ops_init+0x68/0x140
[    2.246961]  setup_net+0x85/0x150
[    2.246985]  copy_net_ns+0xf5/0x200
[    2.247007]  create_new_namespaces+0x117/0x2f0
[    2.247040]  unshare_nsproxy_namespaces+0x85/0xb0
[    2.247066]  ksys_unshare+0x346/0x5e0
[    2.247089]  __x64_sys_unshare+0x12/0x20
[    2.247112]  do_syscall_64+0x104/0xfc0
[    2.247136]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.247165] RIP: 0033:0x7fa8926c7bcb
[    2.247192] 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
[    2.247287] RSP: 002b:00007ffe362ec1f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[    2.247330] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa8926c7bcb
[    2.247375] RDX: 0000000000000000 RSI: 00007ffe362ebf60 RDI: 0000000040000000
[    2.247419] RBP: 00007ffe362ec580 R08: 00007ffe362ec150 R09: 0000000000000000
[    2.247468] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[    2.247512] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055fed7bdbb68
[    2.247551]  </TASK>
[    2.247570] ---[ end trace 0000000000000000 ]---
[    2.250986] ------------[ cut here ]------------
[    2.251020] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.251074] Modules linked in:
[    2.251094] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.251146] Tainted: [W]=WARN
[    2.251166] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.251208] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.251238] 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
[    2.251330] RSP: 0018:ff2dcb53c03ffd68 EFLAGS: 00010286
[    2.251357] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    2.251399] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff12f6e001926400
[    2.251438] RBP: 0000000000000000 R08: ff12f6e00196af90 R09: ff12f6e006d27030
[    2.251483] R10: ff12f6e006cb8118 R11: fefefefefefefeff R12: 0000000000000000
[    2.251530] R13: 0000000000000010 R14: ff12f6e006cb8000 R15: ff12f6e001926400
[    2.251576] FS:  000000003ab2e400(0000) GS:ff12f6e0a6816000(0000) knlGS:0000000000000000
[    2.251620] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.251660] CR2: 00007ff145476000 CR3: 0000000006ca7002 CR4: 0000000000771ef0
[    2.251702] PKRU: 55555554
[    2.251715] Call Trace:
[    2.251729]  <TASK>
[    2.251744]  rtmsg_ifinfo+0x3c/0xa0
[    2.251766]  register_netdevice+0x889/0x9f0
[    2.251788]  __tun_chr_ioctl+0x83c/0x16c0
[    2.251810]  ? do_sys_openat2+0x9a/0xe0
[    2.251833]  __x64_sys_ioctl+0xa1/0xe0
[    2.251856]  do_syscall_64+0x104/0xfc0
[    2.251877]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.251909] RIP: 0033:0x47cc8d
[    2.251932] 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
[    2.252031] RSP: 002b:00007ffd6ae7a0a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.252071] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.252111] RDX: 00007ffd6ae7a120 RSI: 00000000400454ca RDI: 0000000000000005
[    2.252154] RBP: 00007ffd6ae7a0f0 R08: 0000000000000000 R09: 0000000000000000
[    2.252204] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6ae7a5f8
[    2.252245] R13: 00007ffd6ae7a678 R14: 0000000000000002 R15: 0000000000543540
[    2.252289]  </TASK>
[    2.252301] ---[ end trace 0000000000000000 ]---
[    2.252344] ------------[ cut here ]------------
[    2.252371] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.252421] Modules linked in:
[    2.252443] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.252500] Tainted: [W]=WARN
[    2.252521] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.252554] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.252583] 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
[    2.252695] RSP: 0018:ff2dcb53c03ffd60 EFLAGS: 00010286
[    2.252726] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[    2.252765] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff12f6e001926400
[    2.252808] RBP: 0000000000000002 R08: ff12f6e00196af90 R09: ff12f6e006d27030
[    2.252850] R10: ff12f6e006cb8118 R11: fefefefefefefeff R12: 0000000000000000
[    2.252893] R13: 0000000000000010 R14: ff12f6e006cb8000 R15: ff12f6e001926400
[    2.252942] FS:  000000003ab2e400(0000) GS:ff12f6e0a6816000(0000) knlGS:0000000000000000
[    2.252985] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.253017] CR2: 00007ff145476000 CR3: 0000000006ca7002 CR4: 0000000000771ef0
[    2.253058] PKRU: 55555554
[    2.253073] Call Trace:
[    2.253090]  <TASK>
[    2.253102]  rtnetlink_event+0x6e/0xb0
[    2.253125]  notifier_call_chain+0x6d/0x100
[    2.253148]  netdev_update_features+0x56/0x60
[    2.253177]  __tun_chr_ioctl+0xbf1/0x16c0
[    2.253199]  ? file_init_path+0x62/0x120
[    2.253221]  __x64_sys_ioctl+0xa1/0xe0
[    2.253242]  do_syscall_64+0x104/0xfc0
[    2.253263]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.253288] RIP: 0033:0x47cc8d
[    2.253309] 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
[    2.253401] RSP: 002b:00007ffd6ae7a0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.253441] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.253490] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[    2.253527] RBP: 00007ffd6ae7a130 R08: 0000000000000000 R09: 0000000000000000
[    2.253565] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6ae7a5f8
[    2.253613] R13: 00007ffd6ae7a678 R14: 0000000000000002 R15: 0000000000543540
[    2.253670]  </TASK>
[    2.253683] ---[ end trace 0000000000000000 ]---
[    2.253723] ------------[ cut here ]------------
[    2.253751] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[    2.253802] Modules linked in:
[    2.253826] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    2.253878] Tainted: [W]=WARN
[    2.253898] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.253936] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    2.253966] 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
[    2.254062] RSP: 0018:ff2dcb53c03ffc10 EFLAGS: 00010286
[    2.254089] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[    2.254132] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff12f6e001926400
[    2.254172] RBP: 0000000000000000 R08: ff12f6e00196af90 R09: ff12f6e006d24030
[    2.254214] R10: ff12f6e006cb8118 R11: fefefefefefefeff R12: 0000000000000000
[    2.254255] R13: 0000000000000010 R14: ff12f6e006cb8000 R15: ff12f6e001926400
[    2.254296] FS:  000000003ab2e400(0000) GS:ff12f6e0a6816000(0000) knlGS:0000000000000000
[    2.254338] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.254374] CR2: 00007ff145476000 CR3: 0000000006ca7002 CR4: 0000000000771ef0
[    2.254412] PKRU: 55555554
[    2.254426] Call Trace:
[    2.254440]  <TASK>
[    2.254461]  rtmsg_ifinfo+0x3c/0xa0
[    2.254484]  __dev_notify_flags+0xb1/0xf0
[    2.254509]  netif_change_flags+0x54/0x70
[    2.254528]  dev_change_flags+0x45/0x80
[    2.254550]  devinet_ioctl+0x607/0x7f0
[    2.254573]  inet_ioctl+0x229/0x240
[    2.254595]  ? __rtnl_unlock+0x35/0x60
[    2.254618]  sock_do_ioctl+0x75/0x140
[    2.254641]  __x64_sys_ioctl+0xa1/0xe0
[    2.254664]  do_syscall_64+0x104/0xfc0
[    2.254685]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    2.254714] RIP: 0033:0x47cc8d
[    2.254735] 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
[    2.254827] RSP: 002b:00007ffd6ae7a0c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[    2.254874] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[    2.254914] RDX: 00007ffd6ae7a130 RSI: 0000000000008914 RDI: 0000000000000006
[    2.254956] RBP: 00007ffd6ae7a110 R08: 0000000000000000 R09: 0000000000000000
[    2.254998] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6ae7a5f8
[    2.255040] R13: 00007ffd6ae7a678 R14: 0000000000000002 R15: 0000000000543540
[    2.255083]  </TASK>
[    2.255095] ---[ end trace 0000000000000000 ]---
[   47.227804] ------------[ cut here ]------------
[   47.227891] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.227957] Modules linked in:
[   47.227985] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.228045] Tainted: [W]=WARN
[   47.228069] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.228103] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.228132] 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
[   47.228234] RSP: 0018:ff2dcb53c03ffb58 EFLAGS: 00010286
[   47.228263] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   47.228301] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff12f6e002e88f00
[   47.228339] RBP: 0000000000000000 R08: ff12f6e00196af90 R09: ff12f6e006fcb030
[   47.228378] R10: ff12f6e006cb8118 R11: fefefefefefefeff R12: 0000000000000000
[   47.228417] R13: 0000000000000010 R14: ff12f6e006cb8000 R15: ff12f6e002e88f00
[   47.228461] FS:  0000000000000000(0000) GS:ff12f6e0a6816000(0000) knlGS:0000000000000000
[   47.228501] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.228534] CR2: 00005564b219ad60 CR3: 0000000005442005 CR4: 0000000000771ef0
[   47.228578] PKRU: 55555554
[   47.228594] Call Trace:
[   47.228611]  <TASK>
[   47.228626]  rtmsg_ifinfo+0x3c/0xa0
[   47.228647]  netif_close_many+0xed/0x190
[   47.228669]  unregister_netdevice_many_notify+0x267/0x9d0
[   47.228703]  ? __queue_work+0x141/0x550
[   47.228725]  unregister_netdevice_queue+0x9e/0xd0
[   47.228753]  __tun_detach+0x591/0x5b0
[   47.228778]  tun_chr_close+0x3f/0xc0
[   47.228804]  __fput+0xe8/0x2c0
[   47.228827]  task_work_run+0x63/0xa0
[   47.228848]  do_exit+0x2c1/0xba0
[   47.228871]  ? netlink_unicast+0x273/0x3a0
[   47.228894]  do_group_exit+0x2d/0xc0
[   47.228915]  get_signal+0x82e/0x900
[   47.228939]  arch_do_signal_or_restart+0x77/0x2b0
[   47.228968]  exit_to_user_mode_loop+0x75/0x4a0
[   47.228998]  do_syscall_64+0x439/0xfc0
[   47.229021]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.229051] RIP: 0033:0x4c2d9e
[   47.229073] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.229105] RSP: 002b:00007ffd6ae79a50 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.229149] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.229201] RDX: 0000000000000014 RSI: 00007ffd6ae79b30 RDI: 0000000000000007
[   47.229239] RBP: 00007ffd6ae79a60 R08: 00007ffd6ae79af0 R09: 000000000000000c
[   47.229279] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd6ae7a5f8
[   47.229324] R13: 00007ffd6ae7a678 R14: 00007ffd6ae79c20 R15: 0000000000543540
[   47.229364]  </TASK>
[   47.229379] ---[ end trace 0000000000000000 ]---
[   47.229470] ------------[ cut here ]------------
[   47.229497] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/159
[   47.229544] Modules linked in:
[   47.229575] CPU: 3 UID: 0 PID: 159 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.229628] Tainted: [W]=WARN
[   47.229652] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.229685] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.229713] 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
[   47.229800] RSP: 0018:ff2dcb53c03ffbc8 EFLAGS: 00010286
[   47.229827] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.229866] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff12f6e002e88f00
[   47.229903] RBP: 0000000000000000 R08: ff12f6e00196af90 R09: ff12f6e006d29030
[   47.229939] R10: ff12f6e006cb8118 R11: fefefefefefefeff R12: 0000000000000000
[   47.229976] R13: 0000000000000011 R14: ff12f6e006cb8000 R15: ff12f6e002e88f00
[   47.230022] FS:  0000000000000000(0000) GS:ff12f6e0a6816000(0000) knlGS:0000000000000000
[   47.230061] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.230098] CR2: 00005564b219ad60 CR3: 0000000005442005 CR4: 0000000000771ef0
[   47.230143] PKRU: 55555554
[   47.230157] Call Trace:
[   47.230172]  <TASK>
[   47.230469]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.230501]  unregister_netdevice_queue+0x9e/0xd0
[   47.230533]  __tun_detach+0x591/0x5b0
[   47.230559]  tun_chr_close+0x3f/0xc0
[   47.230582]  __fput+0xe8/0x2c0
[   47.230602]  task_work_run+0x63/0xa0
[   47.230624]  do_exit+0x2c1/0xba0
[   47.230645]  ? netlink_unicast+0x273/0x3a0
[   47.230669]  do_group_exit+0x2d/0xc0
[   47.230690]  get_signal+0x82e/0x900
[   47.230713]  arch_do_signal_or_restart+0x77/0x2b0
[   47.230740]  exit_to_user_mode_loop+0x75/0x4a0
[   47.230769]  do_syscall_64+0x439/0xfc0
[   47.230790]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.230817] RIP: 0033:0x4c2d9e
[   47.230836] Code: Unable to access opcode bytes at 0x4c2d74.
[   47.230868] RSP: 002b:00007ffd6ae79a50 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   47.230915] RAX: 0000000000000014 RBX: 0000000000000012 RCX: 00000000004c2d9e
[   47.230956] RDX: 0000000000000014 RSI: 00007ffd6ae79b30 RDI: 0000000000000007
[   47.231000] RBP: 00007ffd6ae79a60 R08: 00007ffd6ae79af0 R09: 000000000000000c
[   47.231043] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd6ae7a5f8
[   47.231079] R13: 00007ffd6ae7a678 R14: 00007ffd6ae79c20 R15: 0000000000543540
[   47.231116]  </TASK>
[   47.231128] ---[ end trace 0000000000000000 ]---
[   47.242269] ------------[ cut here ]------------
[   47.242315] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: kworker/u16:1/65
[   47.242375] Modules linked in:
[   47.242398] CPU: 0 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.242454] Tainted: [W]=WARN
[   47.242475] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.242513] Workqueue: netns cleanup_net
[   47.242539] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.242576] 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
[   47.242669] RSP: 0018:ff2dcb53c023fc78 EFLAGS: 00010286
[   47.242693] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.242734] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff12f6e0018a0c00
[   47.242773] RBP: 0000000000000000 R08: ff12f6e001ecb890 R09: ff12f6e0019ba02c
[   47.242812] R10: ff12f6e00300d118 R11: fefefefefefefeff R12: 0000000000000000
[   47.242852] R13: 0000000000000011 R14: ff12f6e00300d000 R15: ff12f6e0018a0c00
[   47.242897] FS:  0000000000000000(0000) GS:ff12f6e0a6696000(0000) knlGS:0000000000000000
[   47.242939] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.242972] CR2: 00007f6a4bd23f98 CR3: 0000000005442003 CR4: 0000000000771ef0
[   47.243011] PKRU: 55555554
[   47.243026] Call Trace:
[   47.243041]  <TASK>
[   47.243056]  unregister_netdevice_many_notify+0x877/0x9d0
[   47.243088]  default_device_exit_batch+0x318/0x390
[   47.243117]  ops_undo_list+0x10b/0x240
[   47.243137]  cleanup_net+0x1d7/0x2e0
[   47.243160]  process_one_work+0x162/0x360
[   47.243197]  worker_thread+0x16e/0x2d0
[   47.243218]  ? rescuer_thread+0x510/0x510
[   47.243241]  kthread+0xe1/0x120
[   47.243266]  ? kthread_park+0xa0/0xa0
[   47.243289]  ret_from_fork+0x16d/0x250
[   47.243315]  ? kthread_park+0xa0/0xa0
[   47.243339]  ret_from_fork_asm+0x11/0x20
[   47.243362]  </TASK>
[   47.243379] ---[ end trace 0000000000000000 ]---