[   47.694039] ------------[ cut here ]------------
[   47.694091] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: unshare/204
[   47.694151] Modules linked in:
[   47.694177] CPU: 3 UID: 0 PID: 204 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.694237] Tainted: [W]=WARN
[   47.694257] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.694293] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.694324] 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
[   47.694425] RSP: 0018:ff8771868045fcc8 EFLAGS: 00010286
[   47.694454] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.694494] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff41a9c20393ed00
[   47.694533] RBP: 0000000000000000 R08: ff41a9c203940910 R09: ff41a9c2019be02c
[   47.694574] R10: ff41a9c2019b9118 R11: fefefefefefefeff R12: 0000000000000000
[   47.694614] R13: 0000000000000010 R14: ff41a9c2019b9000 R15: ff41a9c20393ed00
[   47.694656] FS:  00007fda12659740(0000) GS:ff41a9c287616000(0000) knlGS:0000000000000000
[   47.694707] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.694739] CR2: 000056332ef0a008 CR3: 0000000003a5c002 CR4: 0000000000771ef0
[   47.694780] PKRU: 55555554
[   47.694797] Call Trace:
[   47.694813]  <TASK>
[   47.694828]  rtmsg_ifinfo+0x3c/0xa0
[   47.694851]  register_netdevice+0x889/0x9f0
[   47.694876]  register_netdev+0x1e/0x30
[   47.694899]  loopback_net_init+0x57/0xb0
[   47.694922]  ? vsock_sysctl_init_net+0xb6/0x140
[   47.694946]  ops_init+0x68/0x140
[   47.694971]  setup_net+0x85/0x150
[   47.694993]  copy_net_ns+0xf5/0x200
[   47.695012]  create_new_namespaces+0x117/0x2f0
[   47.695044]  unshare_nsproxy_namespaces+0x85/0xb0
[   47.695072]  ksys_unshare+0x346/0x5e0
[   47.695097]  __x64_sys_unshare+0x12/0x20
[   47.695120]  do_syscall_64+0x104/0xfc0
[   47.695141]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.695169] RIP: 0033:0x7fda12754bcb
[   47.695191] 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
[   47.695285] RSP: 002b:00007ffff7884f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[   47.695326] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fda12754bcb
[   47.695369] RDX: 0000000000000000 RSI: 00007ffff7884cb0 RDI: 0000000040000000
[   47.695409] RBP: 00007ffff78852d0 R08: 00007ffff7884ea0 R09: 0000000000000000
[   47.695449] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[   47.695492] R13: 0000000000000000 R14: 00000000ffffffff R15: 00005633111ceb68
[   47.695535]  </TASK>
[   47.695550] ---[ end trace 0000000000000000 ]---
[   47.696140] ------------[ cut here ]------------
[   47.696170] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/204
[   47.696225] Modules linked in:
[   47.696244] CPU: 3 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.696303] Tainted: [W]=WARN
[   47.696324] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.696362] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.696386] 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
[   47.696481] RSP: 0018:ff8771868045fd68 EFLAGS: 00010286
[   47.696510] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   47.696553] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff41a9c20393ed00
[   47.696594] RBP: 0000000000000000 R08: ff41a9c203a85a50 R09: ff41a9c2019bc030
[   47.696633] R10: ff41a9c20461c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.696674] R13: 0000000000000010 R14: ff41a9c20461c000 R15: ff41a9c20393ed00
[   47.696730] FS:  000000003bcda400(0000) GS:ff41a9c287616000(0000) knlGS:0000000000000000
[   47.696776] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.696816] CR2: 00007f43efcca000 CR3: 0000000004563003 CR4: 0000000000771ef0
[   47.696860] PKRU: 55555554
[   47.696875] Call Trace:
[   47.696886]  <TASK>
[   47.696900]  rtmsg_ifinfo+0x3c/0xa0
[   47.696923]  register_netdevice+0x889/0x9f0
[   47.696944]  __tun_chr_ioctl+0x83c/0x16c0
[   47.696969]  ? do_sys_openat2+0x9a/0xe0
[   47.696988]  __x64_sys_ioctl+0xa1/0xe0
[   47.697013]  do_syscall_64+0x104/0xfc0
[   47.697037]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.697067] RIP: 0033:0x47cc8d
[   47.697087] 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
[   47.697180] RSP: 002b:00007ffe8a0c4270 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   47.697217] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   47.697257] RDX: 00007ffe8a0c42f0 RSI: 00000000400454ca RDI: 0000000000000005
[   47.697299] RBP: 00007ffe8a0c42c0 R08: 0000000000000000 R09: 0000000000000000
[   47.697339] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe8a0c47c8
[   47.697379] R13: 00007ffe8a0c4848 R14: 0000000000000002 R15: 0000000000543540
[   47.697417]  </TASK>
[   47.697436] ---[ end trace 0000000000000000 ]---
[   47.697476] ------------[ cut here ]------------
[   47.697507] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/204
[   47.697555] Modules linked in:
[   47.697575] CPU: 3 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.697632] Tainted: [W]=WARN
[   47.697652] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.697692] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.697726] 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
[   47.697820] RSP: 0018:ff8771868045fd60 EFLAGS: 00010286
[   47.697849] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[   47.697892] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff41a9c20393ed00
[   47.697933] RBP: 0000000000000002 R08: ff41a9c203a85a50 R09: ff41a9c2019bc030
[   47.697975] R10: ff41a9c20461c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.698022] R13: 0000000000000010 R14: ff41a9c20461c000 R15: ff41a9c20393ed00
[   47.698064] FS:  000000003bcda400(0000) GS:ff41a9c287616000(0000) knlGS:0000000000000000
[   47.698099] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.698136] CR2: 00007f43efcca000 CR3: 0000000004563003 CR4: 0000000000771ef0
[   47.698178] PKRU: 55555554
[   47.698192] Call Trace:
[   47.698207]  <TASK>
[   47.698222]  rtnetlink_event+0x6e/0xb0
[   47.698244]  notifier_call_chain+0x6d/0x100
[   47.698266]  netdev_update_features+0x56/0x60
[   47.698295]  __tun_chr_ioctl+0xbf1/0x16c0
[   47.698315]  ? file_init_path+0x62/0x120
[   47.698339]  __x64_sys_ioctl+0xa1/0xe0
[   47.698361]  do_syscall_64+0x104/0xfc0
[   47.698381]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.698408] RIP: 0033:0x47cc8d
[   47.698432] 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
[   47.698534] RSP: 002b:00007ffe8a0c42b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   47.698572] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   47.698611] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[   47.698654] RBP: 00007ffe8a0c4300 R08: 0000000000000000 R09: 0000000000000000
[   47.698693] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe8a0c47c8
[   47.698740] R13: 00007ffe8a0c4848 R14: 0000000000000002 R15: 0000000000543540
[   47.698783]  </TASK>
[   47.698802] ---[ end trace 0000000000000000 ]---
[   47.698843] ------------[ cut here ]------------
[   47.698870] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/204
[   47.698921] Modules linked in:
[   47.698940] CPU: 3 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   47.698998] Tainted: [W]=WARN
[   47.699019] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.699056] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   47.699083] 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
[   47.699177] RSP: 0018:ff8771868045fc10 EFLAGS: 00010286
[   47.699202] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[   47.699244] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff41a9c20393ed00
[   47.699289] RBP: 0000000000000000 R08: ff41a9c203a85a50 R09: ff41a9c20477f030
[   47.699337] R10: ff41a9c20461c118 R11: fefefefefefefeff R12: 0000000000000000
[   47.699380] R13: 0000000000000010 R14: ff41a9c20461c000 R15: ff41a9c20393ed00
[   47.699423] FS:  000000003bcda400(0000) GS:ff41a9c287616000(0000) knlGS:0000000000000000
[   47.699472] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.699506] CR2: 00007f43efcca000 CR3: 0000000004563003 CR4: 0000000000771ef0
[   47.699551] PKRU: 55555554
[   47.699566] Call Trace:
[   47.699581]  <TASK>
[   47.699597]  rtmsg_ifinfo+0x3c/0xa0
[   47.699617]  __dev_notify_flags+0xb1/0xf0
[   47.699639]  netif_change_flags+0x54/0x70
[   47.699663]  dev_change_flags+0x45/0x80
[   47.699684]  devinet_ioctl+0x607/0x7f0
[   47.699705]  inet_ioctl+0x229/0x240
[   47.699727]  ? __rtnl_unlock+0x35/0x60
[   47.699748]  sock_do_ioctl+0x75/0x140
[   47.699773]  __x64_sys_ioctl+0xa1/0xe0
[   47.699797]  do_syscall_64+0x104/0xfc0
[   47.699818]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   47.699847] RIP: 0033:0x47cc8d
[   47.699868] 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
[   47.699964] RSP: 002b:00007ffe8a0c4290 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   47.700007] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[   47.700047] RDX: 00007ffe8a0c4300 RSI: 0000000000008914 RDI: 0000000000000006
[   47.700089] RBP: 00007ffe8a0c42e0 R08: 0000000000000000 R09: 0000000000000000
[   47.700133] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe8a0c47c8
[   47.700173] R13: 00007ffe8a0c4848 R14: 0000000000000002 R15: 0000000000543540
[   47.700213]  </TASK>
[   47.700228] ---[ end trace 0000000000000000 ]---
[   92.681879] ------------[ cut here ]------------
[   92.681960] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/204
[   92.682028] Modules linked in:
[   92.682051] CPU: 3 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   92.682117] Tainted: [W]=WARN
[   92.682142] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   92.682180] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   92.682212] 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
[   92.682318] RSP: 0018:ff8771868045fb58 EFLAGS: 00010286
[   92.682346] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[   92.682391] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff41a9c201cd0400
[   92.682434] RBP: 0000000000000000 R08: ff41a9c203a85a50 R09: ff41a9c20477f030
[   92.682477] R10: ff41a9c20461c118 R11: fefefefefefefeff R12: 0000000000000000
[   92.682520] R13: 0000000000000010 R14: ff41a9c20461c000 R15: ff41a9c201cd0400
[   92.682566] FS:  0000000000000000(0000) GS:ff41a9c287616000(0000) knlGS:0000000000000000
[   92.682612] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.682649] CR2: 00007f43efcca000 CR3: 0000000015042004 CR4: 0000000000771ef0
[   92.682691] PKRU: 55555554
[   92.682897] Call Trace:
[   92.682919]  <TASK>
[   92.682935]  rtmsg_ifinfo+0x3c/0xa0
[   92.682959]  netif_close_many+0xed/0x190
[   92.682985]  unregister_netdevice_many_notify+0x267/0x9d0
[   92.683014]  ? __queue_work+0x141/0x550
[   92.683041]  unregister_netdevice_queue+0x9e/0xd0
[   92.683069]  __tun_detach+0x591/0x5b0
[   92.683096]  tun_chr_close+0x3f/0xc0
[   92.683116]  __fput+0xe8/0x2c0
[   92.683140]  task_work_run+0x63/0xa0
[   92.683162]  do_exit+0x2c1/0xba0
[   92.683188]  do_group_exit+0x2d/0xc0
[   92.683212]  ? __sys_sendto+0x194/0x220
[   92.683236]  get_signal+0x82e/0x900
[   92.683261]  arch_do_signal_or_restart+0x77/0x2b0
[   92.683288]  exit_to_user_mode_loop+0x75/0x4a0
[   92.683315]  do_syscall_64+0x439/0xfc0
[   92.683341]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   92.683373] RIP: 0033:0x4c2d9e
[   92.683397] Code: Unable to access opcode bytes at 0x4c2d74.
[   92.683432] RSP: 002b:00007ffe8a0c3c20 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   92.683475] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   92.683521] RDX: 0000000000000014 RSI: 00007ffe8a0c3d00 RDI: 0000000000000007
[   92.683566] RBP: 00007ffe8a0c3c30 R08: 00007ffe8a0c3cc0 R09: 000000000000000c
[   92.683608] R10: 0000000000000000 R11: 0000000000000202 R12: 000000003bce2cb0
[   92.683651] R13: 00007ffe8a0c4848 R14: 00007ffe8a0c3df0 R15: 0000000000543540
[   92.683697]  </TASK>
[   92.683713] ---[ end trace 0000000000000000 ]---
[   92.683981] ------------[ cut here ]------------
[   92.684037] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: packetdrill/204
[   92.684096] Modules linked in:
[   92.684120] CPU: 3 UID: 0 PID: 204 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   92.684179] Tainted: [W]=WARN
[   92.684198] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   92.684237] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   92.684262] 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
[   92.684355] RSP: 0018:ff8771868045fbc8 EFLAGS: 00010286
[   92.684385] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   92.684428] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff41a9c201cd0400
[   92.684469] RBP: 0000000000000000 R08: ff41a9c203a85a50 R09: ff41a9c2068a1030
[   92.684511] R10: ff41a9c20461c118 R11: fefefefefefefeff R12: 0000000000000000
[   92.684555] R13: 0000000000000011 R14: ff41a9c20461c000 R15: ff41a9c201cd0400
[   92.684603] FS:  0000000000000000(0000) GS:ff41a9c287616000(0000) knlGS:0000000000000000
[   92.684654] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.684686] CR2: 00007f583ee91f98 CR3: 0000000015042004 CR4: 0000000000771ef0
[   92.684734] PKRU: 55555554
[   92.684749] Call Trace:
[   92.684763]  <TASK>
[   92.684779]  unregister_netdevice_many_notify+0x877/0x9d0
[   92.684808]  unregister_netdevice_queue+0x9e/0xd0
[   92.684837]  __tun_detach+0x591/0x5b0
[   92.684861]  tun_chr_close+0x3f/0xc0
[   92.684884]  __fput+0xe8/0x2c0
[   92.684913]  task_work_run+0x63/0xa0
[   92.684935]  do_exit+0x2c1/0xba0
[   92.684958]  do_group_exit+0x2d/0xc0
[   92.684980]  ? __sys_sendto+0x194/0x220
[   92.685007]  get_signal+0x82e/0x900
[   92.685029]  arch_do_signal_or_restart+0x77/0x2b0
[   92.685054]  exit_to_user_mode_loop+0x75/0x4a0
[   92.685085]  do_syscall_64+0x439/0xfc0
[   92.685110]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[   92.685139] RIP: 0033:0x4c2d9e
[   92.685159] Code: Unable to access opcode bytes at 0x4c2d74.
[   92.685192] RSP: 002b:00007ffe8a0c3c20 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[   92.685234] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[   92.685279] RDX: 0000000000000014 RSI: 00007ffe8a0c3d00 RDI: 0000000000000007
[   92.685321] RBP: 00007ffe8a0c3c30 R08: 00007ffe8a0c3cc0 R09: 000000000000000c
[   92.685367] R10: 0000000000000000 R11: 0000000000000202 R12: 000000003bce2cb0
[   92.685406] R13: 00007ffe8a0c4848 R14: 00007ffe8a0c3df0 R15: 0000000000543540
[   92.685449]  </TASK>
[   92.685465] ---[ end trace 0000000000000000 ]---
[   92.692804] ------------[ cut here ]------------
[   92.692876] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: kworker/u16:0/12
[   92.692978] Modules linked in:
[   92.693035] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[   92.693125] Tainted: [W]=WARN
[   92.693179] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   92.693248] Workqueue: netns cleanup_net
[   92.693306] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[   92.693369] 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
[   92.693499] RSP: 0018:ff87718680067c78 EFLAGS: 00010286
[   92.693563] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[   92.693639] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff41a9c201cd0500
[   92.693723] RBP: 0000000000000000 R08: ff41a9c203940910 R09: ff41a9c20682d02c
[   92.693800] R10: ff41a9c2019b9118 R11: fefefefefefefeff R12: 0000000000000000
[   92.693876] R13: 0000000000000011 R14: ff41a9c2019b9000 R15: ff41a9c201cd0500
[   92.693967] FS:  0000000000000000(0000) GS:ff41a9c287596000(0000) knlGS:0000000000000000
[   92.694045] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   92.694113] CR2: 00007fa29bb2fc40 CR3: 0000000015042002 CR4: 0000000000771ef0
[   92.694189] PKRU: 55555554
[   92.694237] Call Trace:
[   92.694285]  <TASK>
[   92.694351]  unregister_netdevice_many_notify+0x877/0x9d0
[   92.694418]  default_device_exit_batch+0x318/0x390
[   92.694482]  ops_undo_list+0x10b/0x240
[   92.694540]  cleanup_net+0x1d7/0x2e0
[   92.694597]  process_one_work+0x162/0x360
[   92.694655]  worker_thread+0x16e/0x2d0
[   92.694719]  ? rescuer_thread+0x510/0x510
[   92.694775]  kthread+0xe1/0x120
[   92.694833]  ? kthread_park+0xa0/0xa0
[   92.694895]  ret_from_fork+0x16d/0x250
[   92.694959]  ? kthread_park+0xa0/0xa0
[   92.695016]  ret_from_fork_asm+0x11/0x20
[   92.695075]  </TASK>
[   92.695123] ---[ end trace 0000000000000000 ]---