[    1.951771] ip (243) used greatest stack depth: 12152 bytes left
[   32.249105] BUG: kernel NULL pointer dereference, address: 0000000000000000
[   32.249212] #PF: supervisor write access in kernel mode
[   32.249270] #PF: error_code(0x0002) - not-present page
[   32.249322] PGD 0 P4D 0 
[   32.249359] Oops: Oops: 0002 [#1] SMP
[   32.249410] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[   32.249504] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   32.249568] Workqueue: netns cleanup_net
[   32.249622] RIP: 0010:work_grab_pending+0x2f/0x1b0
[   32.249689] 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
[   32.249856] RSP: 0018:ffffadd74024fbb8 EFLAGS: 00010046
[   32.249908] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000c00
[   32.249976] RDX: ffffadd74024fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[   32.250051] RBP: ffffadd74024fbf0 R08: ffff9dfa01394d73 R09: 0000000000000002
[   32.250127] R10: ffff9dfa3eca8840 R11: ffff9dfa01394590 R12: 0000000000000000
[   32.250197] R13: ffffadd74024fce8 R14: 0000000000000020 R15: ffffadd74024fdf0
[   32.250277] FS:  0000000000000000(0000) GS:ffff9dfa91441000(0000) knlGS:0000000000000000
[   32.250357] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.250420] CR2: 0000000000000000 CR3: 0000000030047003 CR4: 0000000000772ef0
[   32.250496] PKRU: 55555554
[   32.250524] Call Trace:
[   32.250561]  <TASK>
[   32.250604]  __cancel_work+0x29/0xe0
[   32.250650]  ? queue_delayed_work_on+0x54/0x60
[   32.250703]  __cancel_work_sync+0x16/0x80
[   32.250747]  __dev_close_many+0x11b/0x280
[   32.250796]  netif_close_many+0x98/0x160
[   32.250842]  unregister_netdevice_many_notify+0x1d8/0xa50
[   32.250909]  ? unregister_netdevice_queue+0x29/0xe0
[   32.250967]  default_device_exit_batch+0x29b/0x300
[   32.251019]  ops_undo_list+0xec/0x1f0
[   32.251067]  cleanup_net+0x1b7/0x2b0
[   32.251114]  process_one_work+0x162/0x380
[   32.251153]  worker_thread+0x299/0x3c0
[   32.251194]  ? rescuer_thread+0x4c0/0x4c0
[   32.251236]  kthread+0x101/0x1f0
[   32.251288]  ? kthreads_online_cpu+0x110/0x110
[   32.251343]  ? kthreads_online_cpu+0x110/0x110
[   32.251399]  ret_from_fork+0x11c/0x140
[   32.251457]  ? kthreads_online_cpu+0x110/0x110
[   32.251512]  ret_from_fork_asm+0x11/0x20
[   32.251568]  </TASK>
[   32.251599] Modules linked in: xt_mark nft_compat nf_tables
[   32.251667] CR2: 0000000000000000
[   32.251712] ---[ end trace 0000000000000000 ]---
[   32.251771] RIP: 0010:work_grab_pending+0x2f/0x1b0
[   32.251823] 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
[   32.251988] RSP: 0018:ffffadd74024fbb8 EFLAGS: 00010046
[   32.252041] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000c00
[   32.252110] RDX: ffffadd74024fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[   32.252178] RBP: ffffadd74024fbf0 R08: ffff9dfa01394d73 R09: 0000000000000002
[   32.252246] R10: ffff9dfa3eca8840 R11: ffff9dfa01394590 R12: 0000000000000000
[   32.252313] R13: ffffadd74024fce8 R14: 0000000000000020 R15: ffffadd74024fdf0
[   32.252384] FS:  0000000000000000(0000) GS:ffff9dfa91441000(0000) knlGS:0000000000000000
[   32.252461] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   32.252524] CR2: 0000000000000000 CR3: 0000000030047003 CR4: 0000000000772ef0
[   32.252593] PKRU: 55555554
[   32.252623] note: kworker/u16:1[66] exited with irqs disabled