[    1.989766] ip (266) used greatest stack depth: 12376 bytes left
[    2.224596] ip (290) used greatest stack depth: 12136 bytes left
[   64.269821] BUG: kernel NULL pointer dereference, address: 0000000000000000
[   64.269894] #PF: supervisor write access in kernel mode
[   64.269943] #PF: error_code(0x0002) - not-present page
[   64.269993] PGD 0 P4D 0 
[   64.270019] Oops: Oops: 0002 [#1] SMP
[   64.270057] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[   64.270133] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   64.270186] Workqueue: netns cleanup_net
[   64.270228] RIP: 0010:work_grab_pending+0x2f/0x1b0
[   64.270275] 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
[   64.270414] RSP: 0018:ffffb6ce8024fb88 EFLAGS: 00010046
[   64.270453] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000004
[   64.270508] RDX: ffffb6ce8024fbc0 RSI: 0000000000000000 RDI: 0000000000000000
[   64.270564] RBP: ffffb6ce8024fbc0 R08: ffff9b76413ab673 R09: ffffffff8b671c80
[   64.270617] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   64.270684] R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000001
[   64.270749] FS:  0000000000000000(0000) GS:ffff9b76f2d91000(0000) knlGS:0000000000000000
[   64.270825] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   64.270885] CR2: 0000000000000000 CR3: 0000000019446004 CR4: 0000000000772ef0
[   64.270949] PKRU: 55555554
[   64.270966] Call Trace:
[   64.270986]  <TASK>
[   64.271009]  __cancel_work+0x29/0xe0
[   64.271044]  ? linkwatch_urgent_event+0x2f/0xb0
[   64.271089]  __cancel_work_sync+0x16/0x80
[   64.271118]  __dev_close_many+0x113/0x2b0
[   64.271168]  __dev_change_flags+0xed/0x220
[   64.271205]  netif_change_flags+0x25/0x60
[   64.271239]  dev_change_flags+0x40/0xa0
[   64.271267]  cycle_netdev+0x36/0x70
[   64.271307]  vrf_dellink+0x5c/0xa0
[   64.271343]  default_device_exit_batch+0x246/0x300
[   64.271397]  ? mutex_lock+0x12/0x30
[   64.271433]  ops_undo_list+0xec/0x1f0
[   64.271468]  cleanup_net+0x1b7/0x300
[   64.271502]  process_one_work+0x162/0x380
[   64.271538]  worker_thread+0x299/0x3c0
[   64.271571]  ? rescuer_thread+0x4c0/0x4c0
[   64.271606]  kthread+0x101/0x1f0
[   64.271636]  ? kthreads_online_cpu+0x110/0x110
[   64.271672]  ? kthreads_online_cpu+0x110/0x110
[   64.271713]  ret_from_fork+0x11c/0x140
[   64.271748]  ? kthreads_online_cpu+0x110/0x110
[   64.271797]  ret_from_fork_asm+0x11/0x20
[   64.271838]  </TASK>
[   64.271864] Modules linked in:
[   64.271908] CR2: 0000000000000000
[   64.271952] ---[ end trace 0000000000000000 ]---
[   64.272007] RIP: 0010:work_grab_pending+0x2f/0x1b0
[   64.272068] 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
[   64.272234] RSP: 0018:ffffb6ce8024fb88 EFLAGS: 00010046
[   64.272279] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000004
[   64.272342] RDX: ffffb6ce8024fbc0 RSI: 0000000000000000 RDI: 0000000000000000
[   64.272405] RBP: ffffb6ce8024fbc0 R08: ffff9b76413ab673 R09: ffffffff8b671c80
[   64.272462] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   64.272518] R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000001
[   64.272576] FS:  0000000000000000(0000) GS:ffff9b76f2d91000(0000) knlGS:0000000000000000
[   64.272632] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   64.272680] CR2: 0000000000000000 CR3: 0000000019446004 CR4: 0000000000772ef0
[   64.272745] PKRU: 55555554
[   64.272763] note: kworker/u16:1[66] exited with irqs disabled