[    4.444079] ------------[ cut here ]------------
[    4.444133] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: python3/341
[    4.444187] Modules linked in: netdevsim
[    4.444213] CPU: 3 UID: 0 PID: 341 Comm: python3 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[    4.444273] Tainted: [W]=WARN
[    4.444296] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    4.444333] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[    4.444358] Code: 80 00 00 00 e8 09 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 a5 fb ff b9 a6 ff ff
[    4.444452] RSP: 0018:ff6cb9f6405679d0 EFLAGS: 00010286
[    4.444482] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[    4.444515] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff14172a8190e300
[    4.444558] RBP: 0000000000000000 R08: ff14172a832794d0 R09: ff14172a8113c030
[    4.444600] R10: ff14172a84f04118 R11: fefefefefefefeff R12: 0000000000000000
[    4.444642] R13: 0000000000000010 R14: ff14172a84f04000 R15: ff14172a8190e300
[    4.444689] FS:  00007fca14f3e400(0000) GS:ff14172b395d5000(0000) knlGS:0000000000000000
[    4.444730] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.444763] CR2: 00007fca14735030 CR3: 0000000002ccd002 CR4: 0000000000771ef0
[    4.444805] PKRU: 55555554
[    4.444818] Call Trace:
[    4.444831]  <TASK>
[    4.444848]  rtmsg_ifinfo+0x3c/0xa0
[    4.444871]  register_netdevice+0x8e1/0xa70
[    4.444901]  nsim_create+0x319/0x410 [netdevsim]
[    4.444933]  __nsim_dev_port_add+0x1cc/0x420 [netdevsim]
[    4.444963]  nsim_drv_probe+0x655/0x750 [netdevsim]
[    4.444994]  really_probe+0xc9/0x290
[    4.445020]  ? driver_probe_device+0xe0/0xe0
[    4.445048]  __driver_probe_device+0x8d/0x160
[    4.445079]  driver_probe_device+0x1f/0xe0
[    4.445100]  __device_attach_driver+0x71/0x100
[    4.445137]  bus_for_each_drv+0x9d/0x100
[    4.445158]  __device_attach+0xb0/0x1b0
[    4.445181]  device_initial_probe+0x4a/0x70
[    4.445202]  bus_probe_device+0x3c/0xb0
[    4.445223]  device_add+0x675/0x8a0
[    4.445242]  new_device_store+0x19b/0x2b0 [netdevsim]
[    4.445273]  kernfs_fop_write_iter+0x151/0x200
[    4.445303]  vfs_write+0x257/0x5c0
[    4.445328]  ksys_write+0x7b/0x110
[    4.445349]  do_syscall_64+0x104/0xfc0
[    4.445374]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[    4.445402] RIP: 0033:0x7fca150c608e
[    4.445425] Code: 4d 89 d8 e8 94 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
[    4.445520] RSP: 002b:00007fffd4e48840 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[    4.445565] RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007fca150c608e
[    4.445602] RDX: 0000000000000008 RSI: 000055bec9e5f050 RDI: 0000000000000006
[    4.445643] RBP: 00007fffd4e48850 R08: 0000000000000000 R09: 0000000000000000
[    4.445680] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fca14f3e390
[    4.445719] R13: 000055bec9e5f050 R14: 0000000000000006 R15: 00007fca14ecd0d0
[    4.445760]  </TASK>
[    4.445772] ---[ end trace 0000000000000000 ]---