[    3.134532] ip_local_port_range: prefer different parity for start/end values.
[    3.185011] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    3.185100] #PF: supervisor write access in kernel mode
[    3.185165] #PF: error_code(0x0002) - not-present page
[    3.185205] PGD 0 P4D 0 
[    3.185237] Oops: Oops: 0002 [#1] SMP
[    3.185272] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    3.185364] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    3.185408] Workqueue: netns cleanup_net
[    3.185458] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    3.185500] 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
[    3.185654] RSP: 0018:ffffbe8540257bb8 EFLAGS: 00010046
[    3.185691] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    3.185765] RDX: ffffbe8540257bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    3.185816] RBP: ffffbe8540257bf0 R08: ffffffff8aa93e00 R09: 0000000000000101
[    3.185876] R10: ffffffff8b6080d8 R11: ffffbe85400e4ff8 R12: 0000000000000000
[    3.185938] R13: ffffbe8540257ce8 R14: 0000000000000020 R15: ffffbe8540257df0
[    3.186018] FS:  0000000000000000(0000) GS:ffff9e6af2e11000(0000) knlGS:0000000000000000
[    3.186092] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.186139] CR2: 0000000000000000 CR3: 000000000489f001 CR4: 0000000000772ef0
[    3.186209] PKRU: 55555554
[    3.186225] Call Trace:
[    3.186243]  <TASK>
[    3.186267]  __cancel_work+0x29/0xe0
[    3.186313]  ? dev_deactivate_many+0x2c9/0x300
[    3.186371]  __cancel_work_sync+0x16/0x80
[    3.186400]  __dev_close_many+0x113/0x2b0
[    3.186447]  netif_close_many+0x98/0x160
[    3.186486]  unregister_netdevice_many_notify+0x1ea/0xaa0
[    3.186521]  default_device_exit_batch+0x29b/0x300
[    3.186556]  ? mutex_lock+0x12/0x30
[    3.186600]  ops_undo_list+0xec/0x1f0
[    3.186627]  cleanup_net+0x1b7/0x300
[    3.186665]  process_one_work+0x162/0x380
[    3.186691]  worker_thread+0x299/0x3c0
[    3.186725]  ? rescuer_thread+0x4c0/0x4c0
[    3.186771]  kthread+0x101/0x1f0
[    3.186828]  ? kthreads_online_cpu+0x110/0x110
[    3.186876]  ? kthreads_online_cpu+0x110/0x110
[    3.186943]  ret_from_fork+0x11c/0x140
[    3.186975]  ? kthreads_online_cpu+0x110/0x110
[    3.187014]  ret_from_fork_asm+0x11/0x20
[    3.187055]  </TASK>
[    3.187072] Modules linked in:
[    3.187099] CR2: 0000000000000000
[    3.187131] ---[ end trace 0000000000000000 ]---
[    3.187173] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    3.187228] 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
[    3.187366] RSP: 0018:ffffbe8540257bb8 EFLAGS: 00010046
[    3.187405] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    3.187464] RDX: ffffbe8540257bf0 RSI: 0000000000000000 RDI: 0000000000000000
[    3.187519] RBP: ffffbe8540257bf0 R08: ffffffff8aa93e00 R09: 0000000000000101
[    3.187574] R10: ffffffff8b6080d8 R11: ffffbe85400e4ff8 R12: 0000000000000000
[    3.187643] R13: ffffbe8540257ce8 R14: 0000000000000020 R15: ffffbe8540257df0
[    3.187704] FS:  0000000000000000(0000) GS:ffff9e6af2e11000(0000) knlGS:0000000000000000
[    3.187768] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.187837] CR2: 0000000000000000 CR3: 000000000489f001 CR4: 0000000000772ef0
[    3.187897] PKRU: 55555554
[    3.187926] note: kworker/u16:1[67] exited with irqs disabled