[    2.082342] ip (264) used greatest stack depth: 12136 bytes left
[    2.516702] eth0: renamed from r1h0
[    2.602717] eth1: renamed from r1h1
[    2.701766] eth2: renamed from r1h2
[    2.799752] eth3: renamed from r1h3
[    5.963637] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    5.963738] #PF: supervisor write access in kernel mode
[    5.963798] #PF: error_code(0x0002) - not-present page
[    5.963850] PGD 0 P4D 0 
[    5.963878] Oops: Oops: 0002 [#1] SMP
[    5.963918] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    5.964023] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    5.964090] Workqueue: netns cleanup_net
[    5.964141] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    5.964203] Code: 83 e6 01 41 57 41 56 4c 8d 77 20 41 55 41 54 41 89 f4 55 48 89 d5 53 48 89 fb 9c 58 fa 48 89 45 00 45 85 e4 0f 85 8a 00 00 00 <f0> 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41
[    5.964384] RSP: 0018:ffffa6cc4025fbb8 EFLAGS: 00010046
[    5.964435] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000800
[    5.964522] RDX: ffffa6cc4025fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[    5.964598] RBP: ffffa6cc4025fbf0 R08: ffff94c10139b673 R09: 0000000000000002
[    5.964675] R10: ffff94c13ec28840 R11: ffff94c10139ae90 R12: 0000000000000000
[    5.964751] R13: ffffa6cc4025fce8 R14: 0000000000000020 R15: ffffa6cc4025fdf0
[    5.964832] FS:  0000000000000000(0000) GS:ffff94c183591000(0000) knlGS:0000000000000000
[    5.964917] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    5.964987] CR2: 0000000000000000 CR3: 000000000324d003 CR4: 0000000000772ef0
[    5.965066] PKRU: 55555554
[    5.965091] Call Trace:
[    5.965118]  <TASK>
[    5.965144]  __cancel_work+0x29/0xe0
[    5.965190]  ? queue_delayed_work_on+0x54/0x60
[    5.965253]  __cancel_work_sync+0x16/0x80
[    5.965293]  __dev_close_many+0x113/0x2b0
[    5.965341]  netif_close_many+0x98/0x160
[    5.965386]  unregister_netdevice_many_notify+0x1ea/0xaa0
[    5.965439]  ? unregister_netdevice_queue+0x29/0xe0
[    5.965499]  default_device_exit_batch+0x29b/0x300
[    5.965551]  ? mutex_lock+0x12/0x30
[    5.965603]  ops_undo_list+0xec/0x1f0
[    5.965644]  cleanup_net+0x1b7/0x300
[    5.965682]  process_one_work+0x162/0x380
[    5.965724]  worker_thread+0x299/0x3c0
[    5.965765]  ? rescuer_thread+0x4c0/0x4c0
[    5.965810]  kthread+0x101/0x1f0
[    5.965850]  ? kthreads_online_cpu+0x110/0x110
[    5.965903]  ? kthreads_online_cpu+0x110/0x110
[    5.965960]  ret_from_fork+0x11c/0x140
[    5.966009]  ? kthreads_online_cpu+0x110/0x110
[    5.966060]  ret_from_fork_asm+0x11/0x20
[    5.966101]  </TASK>
[    5.966124] Modules linked in:
[    5.966163] CR2: 0000000000000000
[    5.966203] ---[ end trace 0000000000000000 ]---
[    5.966253] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    5.966305] Code: 83 e6 01 41 57 41 56 4c 8d 77 20 41 55 41 54 41 89 f4 55 48 89 d5 53 48 89 fb 9c 58 fa 48 89 45 00 45 85 e4 0f 85 8a 00 00 00 <f0> 48 0f ba 2b 00 41 0f 92 c5 72 0e 5b 44 89 e8 5d 41 5c 41 5d 41
[    5.966486] RSP: 0018:ffffa6cc4025fbb8 EFLAGS: 00010046
[    5.966539] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000800
[    5.966616] RDX: ffffa6cc4025fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[    5.966694] RBP: ffffa6cc4025fbf0 R08: ffff94c10139b673 R09: 0000000000000002
[    5.966771] R10: ffff94c13ec28840 R11: ffff94c10139ae90 R12: 0000000000000000
[    5.966849] R13: ffffa6cc4025fce8 R14: 0000000000000020 R15: ffffa6cc4025fdf0
[    5.966927] FS:  0000000000000000(0000) GS:ffff94c183591000(0000) knlGS:0000000000000000
[    5.967005] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    5.967067] CR2: 0000000000000000 CR3: 000000000324d003 CR4: 0000000000772ef0
[    5.967147] PKRU: 55555554
[    5.967172] note: kworker/u16:1[68] exited with irqs disabled