[    1.928516] ip (245) used greatest stack depth: 12152 bytes left
[    2.903092] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    2.903184] #PF: supervisor write access in kernel mode
[    2.903231] #PF: error_code(0x0002) - not-present page
[    2.903283] PGD 0 P4D 0 
[    2.903308] Oops: Oops: 0002 [#1] SMP
[    2.903347] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    2.903443] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.903507] Workqueue: netns cleanup_net
[    2.903553] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.903610] 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
[    2.903789] RSP: 0018:ffffbd1340067bb8 EFLAGS: 00010046
[    2.903839] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.903915] RDX: ffffbd1340067bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.903991] RBP: ffffbd1340067bf0 R08: ffffffff852779b0 R09: 0000000000000101
[    2.904067] R10: ffffffff85a080d8 R11: ffffbd1340003ff8 R12: 0000000000000000
[    2.904143] R13: ffffbd1340067ce8 R14: 0000000000000020 R15: ffffbd1340067df0
[    2.904221] FS:  0000000000000000(0000) GS:ffffa0bcb89c1000(0000) knlGS:0000000000000000
[    2.904303] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.904366] CR2: 0000000000000000 CR3: 0000000015447001 CR4: 0000000000772ef0
[    2.904443] PKRU: 55555554
[    2.904468] Call Trace:
[    2.904495]  <TASK>
[    2.904521]  __cancel_work+0x29/0xe0
[    2.904564]  ? dev_deactivate_many+0x2c9/0x300
[    2.904619]  __cancel_work_sync+0x16/0x80
[    2.904659]  __dev_close_many+0x11b/0x280
[    2.904697]  netif_close_many+0x98/0x160
[    2.904734]  unregister_netdevice_many_notify+0x1d8/0xa50
[    2.904784]  default_device_exit_batch+0x29b/0x300
[    2.904836]  ops_undo_list+0xec/0x1f0
[    2.904874]  cleanup_net+0x1b7/0x2b0
[    2.904912]  process_one_work+0x162/0x380
[    2.904950]  worker_thread+0x299/0x3c0
[    2.904987]  ? rescuer_thread+0x4c0/0x4c0
[    2.905026]  kthread+0x101/0x1f0
[    2.905063]  ? kthreads_online_cpu+0x110/0x110
[    2.905114]  ? kthreads_online_cpu+0x110/0x110
[    2.905165]  ret_from_fork+0x11c/0x140
[    2.905210]  ? kthreads_online_cpu+0x110/0x110
[    2.905267]  ret_from_fork_asm+0x11/0x20
[    2.905313]  </TASK>
[    2.905337] Modules linked in:
[    2.905376] CR2: 0000000000000000
[    2.905414] ---[ end trace 0000000000000000 ]---
[    2.905463] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.905513] 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
[    2.905692] RSP: 0018:ffffbd1340067bb8 EFLAGS: 00010046
[    2.905742] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.905818] RDX: ffffbd1340067bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.905894] RBP: ffffbd1340067bf0 R08: ffffffff852779b0 R09: 0000000000000101
[    2.905971] R10: ffffffff85a080d8 R11: ffffbd1340003ff8 R12: 0000000000000000
[    2.906046] R13: ffffbd1340067ce8 R14: 0000000000000020 R15: ffffbd1340067df0
[    2.906123] FS:  0000000000000000(0000) GS:ffffa0bcb89c1000(0000) knlGS:0000000000000000
[    2.906198] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.906260] CR2: 0000000000000000 CR3: 0000000015447001 CR4: 0000000000772ef0
[    2.906337] PKRU: 55555554
[    2.906362] note: kworker/u16:0[12] exited with irqs disabled