[  547.822608] ------------[ cut here ]------------
[  547.822659] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: unshare/691
[  547.822716] Modules linked in:
[  547.822742] CPU: 0 UID: 0 PID: 691 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  547.822800] Tainted: [W]=WARN
[  547.822821] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.822859] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  547.822887] 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
[  547.822983] RSP: 0018:ff71d8c680a2fcc8 EFLAGS: 00010286
[  547.823010] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  547.823050] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5db00
[  547.823091] RBP: 0000000000000000 R08: ff3cc9a4c32740d0 R09: ff3cc9a4c295702c
[  547.823133] R10: ff3cc9a4c4cf2118 R11: fefefefefefefeff R12: 0000000000000000
[  547.823173] R13: 0000000000000010 R14: ff3cc9a4c4cf2000 R15: ff3cc9a4c2b5db00
[  547.823219] FS:  00007faec96c8740(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  547.823264] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.823304] CR2: 0000556cf7c3f008 CR3: 00000000032bc006 CR4: 0000000000771ef0
[  547.823351] PKRU: 55555554
[  547.823371] Call Trace:
[  547.823390]  <TASK>
[  547.823405]  rtmsg_ifinfo+0x3c/0xa0
[  547.823428]  register_netdevice+0x889/0x9f0
[  547.823451]  register_netdev+0x1e/0x30
[  547.823472]  loopback_net_init+0x57/0xb0
[  547.823501]  ? vsock_sysctl_init_net+0xb6/0x140
[  547.823533]  ops_init+0x68/0x140
[  547.823558]  setup_net+0x85/0x150
[  547.823581]  copy_net_ns+0xf5/0x200
[  547.823608]  create_new_namespaces+0x117/0x2f0
[  547.823643]  unshare_nsproxy_namespaces+0x85/0xb0
[  547.823672]  ksys_unshare+0x346/0x5e0
[  547.823700]  __x64_sys_unshare+0x12/0x20
[  547.823724]  do_syscall_64+0x104/0xfc0
[  547.823754]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  547.823785] RIP: 0033:0x7faec97c3bcb
[  547.823808] 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
[  547.823908] RSP: 002b:00007ffe14354b08 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  547.823953] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faec97c3bcb
[  547.823997] RDX: 0000000000000000 RSI: 00007ffe14354870 RDI: 0000000040000000
[  547.824043] RBP: 00007ffe14354e90 R08: 00007ffe14354a60 R09: 0000000000000000
[  547.824085] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  547.824130] R13: 0000000000000000 R14: 00000000ffffffff R15: 0000556ccfb51b68
[  547.824173]  </TASK>
[  547.824190] ---[ end trace 0000000000000000 ]---
[  547.824844] ------------[ cut here ]------------
[  547.824879] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/691
[  547.824936] Modules linked in:
[  547.824967] CPU: 0 UID: 0 PID: 691 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  547.825025] Tainted: [W]=WARN
[  547.825050] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.825079] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  547.825113] 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
[  547.825211] RSP: 0018:ff71d8c680a2fd68 EFLAGS: 00010286
[  547.825237] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  547.825288] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5db00
[  547.825331] RBP: 0000000000000000 R08: ff3cc9a4c1906b50 R09: ff3cc9a4c2e5d030
[  547.825369] R10: ff3cc9a4c4d7c118 R11: fefefefefefefeff R12: 0000000000000000
[  547.825411] R13: 0000000000000010 R14: ff3cc9a4c4d7c000 R15: ff3cc9a4c2b5db00
[  547.825459] FS:  0000000011ff5400(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  547.825503] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.825540] CR2: 00007fd552fcc000 CR3: 000000000338d001 CR4: 0000000000771ef0
[  547.825586] PKRU: 55555554
[  547.825600] Call Trace:
[  547.825616]  <TASK>
[  547.825636]  rtmsg_ifinfo+0x3c/0xa0
[  547.825662]  register_netdevice+0x889/0x9f0
[  547.825685]  __tun_chr_ioctl+0x83c/0x16c0
[  547.825712]  ? do_sys_openat2+0x9a/0xe0
[  547.825740]  __x64_sys_ioctl+0xa1/0xe0
[  547.825766]  do_syscall_64+0x104/0xfc0
[  547.825786]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  547.825816] RIP: 0033:0x47cc8d
[  547.825838] 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
[  547.825953] RSP: 002b:00007ffd6c2b6480 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  547.825996] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  547.826039] RDX: 00007ffd6c2b6500 RSI: 00000000400454ca RDI: 0000000000000005
[  547.826083] RBP: 00007ffd6c2b64d0 R08: 0000000000000000 R09: 0000000000000000
[  547.826124] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6c2b69d8
[  547.826163] R13: 00007ffd6c2b6a58 R14: 0000000000000002 R15: 0000000000543540
[  547.826206]  </TASK>
[  547.826220] ---[ end trace 0000000000000000 ]---
[  547.826265] ------------[ cut here ]------------
[  547.826296] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/691
[  547.826347] Modules linked in:
[  547.826367] CPU: 0 UID: 0 PID: 691 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  547.826421] Tainted: [W]=WARN
[  547.826441] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.826474] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  547.826504] 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
[  547.826606] RSP: 0018:ff71d8c680a2fd60 EFLAGS: 00010286
[  547.826639] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  547.826680] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5db00
[  547.826730] RBP: 0000000000000002 R08: ff3cc9a4c1906b50 R09: ff3cc9a4c2e5d030
[  547.826768] R10: ff3cc9a4c4d7c118 R11: fefefefefefefeff R12: 0000000000000000
[  547.826811] R13: 0000000000000010 R14: ff3cc9a4c4d7c000 R15: ff3cc9a4c2b5db00
[  547.826852] FS:  0000000011ff5400(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  547.826895] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.826932] CR2: 00007fd552fcc000 CR3: 000000000338d001 CR4: 0000000000771ef0
[  547.826982] PKRU: 55555554
[  547.826997] Call Trace:
[  547.827013]  <TASK>
[  547.827027]  rtnetlink_event+0x6e/0xb0
[  547.827050]  notifier_call_chain+0x6d/0x100
[  547.827075]  netdev_update_features+0x56/0x60
[  547.827105]  __tun_chr_ioctl+0xbf1/0x16c0
[  547.827127]  ? file_init_path+0x62/0x120
[  547.827151]  __x64_sys_ioctl+0xa1/0xe0
[  547.827173]  do_syscall_64+0x104/0xfc0
[  547.827196]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  547.827223] RIP: 0033:0x47cc8d
[  547.827254] 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
[  547.827355] RSP: 002b:00007ffd6c2b64c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  547.827397] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  547.827447] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  547.827491] RBP: 00007ffd6c2b6510 R08: 0000000000000000 R09: 0000000000000000
[  547.827532] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6c2b69d8
[  547.827574] R13: 00007ffd6c2b6a58 R14: 0000000000000002 R15: 0000000000543540
[  547.827615]  </TASK>
[  547.827630] ---[ end trace 0000000000000000 ]---
[  547.827674] ------------[ cut here ]------------
[  547.827703] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/691
[  547.827750] Modules linked in:
[  547.827770] CPU: 0 UID: 0 PID: 691 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  547.827829] Tainted: [W]=WARN
[  547.827852] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.827888] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  547.827916] 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
[  547.828023] RSP: 0018:ff71d8c680a2fc10 EFLAGS: 00010286
[  547.828051] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  547.828095] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5db00
[  547.828139] RBP: 0000000000000000 R08: ff3cc9a4c1906b50 R09: ff3cc9a4c4c13030
[  547.828179] R10: ff3cc9a4c4d7c118 R11: fefefefefefefeff R12: 0000000000000000
[  547.828217] R13: 0000000000000010 R14: ff3cc9a4c4d7c000 R15: ff3cc9a4c2b5db00
[  547.828265] FS:  0000000011ff5400(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  547.828307] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  547.828347] CR2: 00007fd552fcc000 CR3: 000000000338d001 CR4: 0000000000771ef0
[  547.828391] PKRU: 55555554
[  547.828406] Call Trace:
[  547.828422]  <TASK>
[  547.828437]  rtmsg_ifinfo+0x3c/0xa0
[  547.828460]  __dev_notify_flags+0xb1/0xf0
[  547.828482]  netif_change_flags+0x54/0x70
[  547.828505]  dev_change_flags+0x45/0x80
[  547.828528]  devinet_ioctl+0x607/0x7f0
[  547.828554]  inet_ioctl+0x229/0x240
[  547.828576]  ? __rtnl_unlock+0x35/0x60
[  547.828598]  sock_do_ioctl+0x75/0x140
[  547.828622]  __x64_sys_ioctl+0xa1/0xe0
[  547.828645]  do_syscall_64+0x104/0xfc0
[  547.828664]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  547.828692] RIP: 0033:0x47cc8d
[  547.828710] 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
[  547.828809] RSP: 002b:00007ffd6c2b64a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  547.828853] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  547.828898] RDX: 00007ffd6c2b6510 RSI: 0000000000008914 RDI: 0000000000000006
[  547.828944] RBP: 00007ffd6c2b64f0 R08: 0000000000000000 R09: 0000000000000000
[  547.828986] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd6c2b69d8
[  547.829031] R13: 00007ffd6c2b6a58 R14: 0000000000000002 R15: 0000000000543540
[  547.829072]  </TASK>
[  547.829086] ---[ end trace 0000000000000000 ]---
[  592.807640] ------------[ cut here ]------------
[  592.807727] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#0: packetdrill/691
[  592.807784] Modules linked in:
[  592.807809] CPU: 0 UID: 0 PID: 691 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  592.807884] Tainted: [W]=WARN
[  592.807907] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  592.808102] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  592.808135] 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
[  592.808231] RSP: 0018:ff71d8c680a2fb58 EFLAGS: 00010286
[  592.808265] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  592.808306] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b5d800
[  592.808349] RBP: 0000000000000000 R08: ff3cc9a4c1906b50 R09: ff3cc9a4c4c13030
[  592.808393] R10: ff3cc9a4c4d7c118 R11: fefefefefefefeff R12: 0000000000000000
[  592.808438] R13: 0000000000000010 R14: ff3cc9a4c4d7c000 R15: ff3cc9a4c2b5d800
[  592.808483] FS:  0000000000000000(0000) GS:ff3cc9a545e96000(0000) knlGS:0000000000000000
[  592.808529] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  592.808563] CR2: 00007fd552fcc000 CR3: 0000000013a42004 CR4: 0000000000771ef0
[  592.808604] PKRU: 55555554
[  592.808619] Call Trace:
[  592.808633]  <TASK>
[  592.808650]  rtmsg_ifinfo+0x3c/0xa0
[  592.808673]  netif_close_many+0xed/0x190
[  592.808698]  unregister_netdevice_many_notify+0x267/0x9d0
[  592.808726]  ? __queue_work+0x141/0x550
[  592.808750]  unregister_netdevice_queue+0x9e/0xd0
[  592.808774]  __tun_detach+0x591/0x5b0
[  592.808801]  tun_chr_close+0x3f/0xc0
[  592.808822]  __fput+0xe8/0x2c0
[  592.808848]  task_work_run+0x63/0xa0
[  592.808873]  do_exit+0x2c1/0xba0
[  592.808895]  do_group_exit+0x2d/0xc0
[  592.808920]  ? __sys_sendto+0x194/0x220
[  592.808944]  get_signal+0x82e/0x900
[  592.808969]  arch_do_signal_or_restart+0x77/0x2b0
[  592.809002]  exit_to_user_mode_loop+0x75/0x4a0
[  592.809033]  do_syscall_64+0x439/0xfc0
[  592.809056]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  592.809085] RIP: 0033:0x4c2d9e
[  592.809108] Code: Unable to access opcode bytes at 0x4c2d74.
[  592.809144] RSP: 002b:00007ffd6c2b5e30 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  592.809190] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[  592.809223] RDX: 0000000000000014 RSI: 00007ffd6c2b5f10 RDI: 0000000000000007
[  592.809263] RBP: 00007ffd6c2b5e40 R08: 00007ffd6c2b5ed0 R09: 000000000000000c
[  592.809303] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000012000400
[  592.809343] R13: 00007ffd6c2b6a58 R14: 00007ffd6c2b6000 R15: 0000000000543540
[  592.809387]  </TASK>
[  592.809402] ---[ end trace 0000000000000000 ]---
[  592.809525] ------------[ cut here ]------------
[  592.809590] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/691
[  592.809678] Modules linked in:
[  592.809735] CPU: 2 UID: 0 PID: 691 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  592.809828] Tainted: [W]=WARN
[  592.809883] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  592.809961] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  592.810025] 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
[  592.810158] RSP: 0018:ff71d8c680a2fbc8 EFLAGS: 00010286
[  592.810222] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  592.810299] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c2b74800
[  592.810382] RBP: 0000000000000000 R08: ff3cc9a4c1906b50 R09: ff3cc9a4c318b830
[  592.810458] R10: ff3cc9a4c4d7c118 R11: fefefefefefefeff R12: 0000000000000000
[  592.810536] R13: 0000000000000011 R14: ff3cc9a4c4d7c000 R15: ff3cc9a4c2b74800
[  592.810616] FS:  0000000000000000(0000) GS:ff3cc9a545f96000(0000) knlGS:0000000000000000
[  592.810694] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  592.810764] CR2: 00007fe7e1bca620 CR3: 00000000032e4001 CR4: 0000000000771ef0
[  592.810842] PKRU: 55555554
[  592.810890] Call Trace:
[  592.810947]  <TASK>
[  592.810996]  unregister_netdevice_many_notify+0x877/0x9d0
[  592.811061]  unregister_netdevice_queue+0x9e/0xd0
[  592.811126]  __tun_detach+0x591/0x5b0
[  592.811184]  tun_chr_close+0x3f/0xc0
[  592.811241]  __fput+0xe8/0x2c0
[  592.811299]  task_work_run+0x63/0xa0
[  592.811357]  do_exit+0x2c1/0xba0
[  592.811418]  do_group_exit+0x2d/0xc0
[  592.811475]  ? __sys_sendto+0x194/0x220
[  592.811532]  get_signal+0x82e/0x900
[  592.811590]  arch_do_signal_or_restart+0x77/0x2b0
[  592.811655]  exit_to_user_mode_loop+0x75/0x4a0
[  592.811720]  do_syscall_64+0x439/0xfc0
[  592.811778]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  592.811842] RIP: 0033:0x4c2d9e
[  592.811898] Code: Unable to access opcode bytes at 0x4c2d74.
[  592.811973] RSP: 002b:00007ffd6c2b5e30 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
[  592.812050] RAX: 0000000000000014 RBX: 0000000000000016 RCX: 00000000004c2d9e
[  592.812129] RDX: 0000000000000014 RSI: 00007ffd6c2b5f10 RDI: 0000000000000007
[  592.812204] RBP: 00007ffd6c2b5e40 R08: 00007ffd6c2b5ed0 R09: 000000000000000c
[  592.812280] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000012000400
[  592.812358] R13: 00007ffd6c2b6a58 R14: 00007ffd6c2b6000 R15: 0000000000543540
[  592.812446]  </TASK>
[  592.812494] ---[ end trace 0000000000000000 ]---
[  592.819072] ------------[ cut here ]------------
[  592.819104] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:1/65
[  592.819168] Modules linked in:
[  592.819192] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  592.819252] Tainted: [W]=WARN
[  592.819273] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  592.819304] Workqueue: netns cleanup_net
[  592.819330] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  592.819359] 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
[  592.819458] RSP: 0018:ff71d8c68023fc78 EFLAGS: 00010286
[  592.819487] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  592.819528] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3cc9a4c30daf00
[  592.819570] RBP: 0000000000000000 R08: ff3cc9a4c32740d0 R09: ff3cc9a4c318802c
[  592.819608] R10: ff3cc9a4c4cf2118 R11: fefefefefefefeff R12: 0000000000000000
[  592.819652] R13: 0000000000000011 R14: ff3cc9a4c4cf2000 R15: ff3cc9a4c30daf00
[  592.819693] FS:  0000000000000000(0000) GS:ff3cc9a546016000(0000) knlGS:0000000000000000
[  592.819729] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  592.819766] CR2: 00007fbf8d6dc680 CR3: 0000000013a42002 CR4: 0000000000771ef0
[  592.819809] PKRU: 55555554
[  592.819824] Call Trace:
[  592.819839]  <TASK>
[  592.819852]  unregister_netdevice_many_notify+0x877/0x9d0
[  592.819880]  default_device_exit_batch+0x318/0x390
[  592.819909]  ops_undo_list+0x10b/0x240
[  592.819934]  cleanup_net+0x1d7/0x2e0
[  592.819956]  process_one_work+0x162/0x360
[  592.819980]  worker_thread+0x16e/0x2d0
[  592.820019]  ? rescuer_thread+0x510/0x510
[  592.820041]  kthread+0xe1/0x120
[  592.820066]  ? kthread_park+0xa0/0xa0
[  592.820088]  ret_from_fork+0x16d/0x250
[  592.820109]  ? kthread_park+0xa0/0xa0
[  592.820133]  ret_from_fork_asm+0x11/0x20
[  592.820157]  </TASK>
[  592.820171] ---[ end trace 0000000000000000 ]---