[    1.937185] ip (256) used greatest stack depth: 12152 bytes left
[    2.721869] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    2.721948] #PF: supervisor write access in kernel mode
[    2.722003] #PF: error_code(0x0002) - not-present page
[    2.722054] PGD 0 P4D 0 
[    2.722087] Oops: Oops: 0002 [#1] SMP
[    2.722128] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    2.722195] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.722242] Workqueue: netns cleanup_net
[    2.722283] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.722327] 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
[    2.722457] RSP: 0018:ffffadc440257bb8 EFLAGS: 00010046
[    2.722495] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.722557] RDX: ffffadc440257bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.722617] RBP: ffffadc440257bf0 R08: ffffffffa38779b0 R09: 0000000000000101
[    2.722693] R10: ffffffffa40080d8 R11: ffffadc440003ff8 R12: 0000000000000000
[    2.722747] R13: ffffadc440257ce8 R14: 0000000000000020 R15: ffffadc440257df0
[    2.722806] FS:  0000000000000000(0000) GS:ffff9c539a3c1000(0000) knlGS:0000000000000000
[    2.722871] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.722915] CR2: 0000000000000000 CR3: 0000000003387002 CR4: 0000000000772ef0
[    2.722978] PKRU: 55555554
[    2.722999] Call Trace:
[    2.723023]  <TASK>
[    2.723052]  __cancel_work+0x29/0xe0
[    2.723093]  ? dev_deactivate_many+0x2c9/0x300
[    2.723132]  __cancel_work_sync+0x16/0x80
[    2.723164]  __dev_close_many+0x11b/0x280
[    2.723194]  netif_close_many+0x98/0x160
[    2.723224]  unregister_netdevice_many_notify+0x1d8/0xa50
[    2.723268]  default_device_exit_batch+0x29b/0x300
[    2.723321]  ops_undo_list+0xec/0x1f0
[    2.723350]  cleanup_net+0x1b7/0x2b0
[    2.723379]  process_one_work+0x162/0x380
[    2.723410]  worker_thread+0x299/0x3c0
[    2.723441]  ? rescuer_thread+0x4c0/0x4c0
[    2.723479]  kthread+0x101/0x1f0
[    2.723508]  ? kthreads_online_cpu+0x110/0x110
[    2.723557]  ? kthreads_online_cpu+0x110/0x110
[    2.723609]  ret_from_fork+0x11c/0x140
[    2.723639]  ? kthreads_online_cpu+0x110/0x110
[    2.723684]  ret_from_fork_asm+0x11/0x20
[    2.723716]  </TASK>
[    2.723737] Modules linked in:
[    2.723777] CR2: 0000000000000000
[    2.723801] ---[ end trace 0000000000000000 ]---
[    2.723845] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.723885] 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
[    2.724012] RSP: 0018:ffffadc440257bb8 EFLAGS: 00010046
[    2.724049] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.724111] RDX: ffffadc440257bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.724164] RBP: ffffadc440257bf0 R08: ffffffffa38779b0 R09: 0000000000000101
[    2.724211] R10: ffffffffa40080d8 R11: ffffadc440003ff8 R12: 0000000000000000
[    2.724263] R13: ffffadc440257ce8 R14: 0000000000000020 R15: ffffadc440257df0
[    2.724324] FS:  0000000000000000(0000) GS:ffff9c539a3c1000(0000) knlGS:0000000000000000
[    2.724377] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.724429] CR2: 0000000000000000 CR3: 0000000003387002 CR4: 0000000000772ef0
[    2.724488] PKRU: 55555554
[    2.724509] note: kworker/u16:1[67] exited with irqs disabled