[    2.012040] ip (254) used greatest stack depth: 12136 bytes left
[    2.118179] sctp: Hash tables configured (bind 256/256)
[    2.153339] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    2.153449] #PF: supervisor write access in kernel mode
[    2.153495] #PF: error_code(0x0002) - not-present page
[    2.153535] PGD 0 P4D 0 
[    2.153566] Oops: Oops: 0002 [#1] SMP
[    2.153606] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    2.153689] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.153747] Workqueue: netns cleanup_net
[    2.153793] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.153840] 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
[    2.153992] RSP: 0018:ffffba95c024fbb8 EFLAGS: 00010046
[    2.154057] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.154115] RDX: ffffba95c024fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.154188] RBP: ffffba95c024fbf0 R08: ffffffffb4693e00 R09: 0000000000000101
[    2.154251] R10: ffffffffb52080d8 R11: ffffba95c00e4ff8 R12: 0000000000000000
[    2.154332] R13: ffffba95c024fce8 R14: 0000000000000020 R15: ffffba95c024fdf0
[    2.154410] FS:  0000000000000000(0000) GS:ffff8f6309211000(0000) knlGS:0000000000000000
[    2.154496] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.154559] CR2: 0000000000000000 CR3: 0000000005c89004 CR4: 0000000000772ef0
[    2.154630] PKRU: 55555554
[    2.154655] Call Trace:
[    2.154676]  <TASK>
[    2.154703]  __cancel_work+0x29/0xe0
[    2.154746]  ? dev_deactivate_many+0x2c9/0x300
[    2.154794]  __cancel_work_sync+0x16/0x80
[    2.154829]  __dev_close_many+0x113/0x2b0
[    2.154866]  netif_close_many+0x98/0x160
[    2.154902]  unregister_netdevice_many_notify+0x1ea/0xaa0
[    2.154948]  default_device_exit_batch+0x29b/0x300
[    2.154994]  ? mutex_lock+0x12/0x30
[    2.155040]  ops_undo_list+0xec/0x1f0
[    2.155076]  cleanup_net+0x1b7/0x300
[    2.155129]  process_one_work+0x162/0x380
[    2.155165]  worker_thread+0x299/0x3c0
[    2.155204]  ? rescuer_thread+0x4c0/0x4c0
[    2.155234]  kthread+0x101/0x1f0
[    2.155275]  ? kthreads_online_cpu+0x110/0x110
[    2.155332]  ? kthreads_online_cpu+0x110/0x110
[    2.155377]  ret_from_fork+0x11c/0x140
[    2.155417]  ? kthreads_online_cpu+0x110/0x110
[    2.155466]  ret_from_fork_asm+0x11/0x20
[    2.155503]  </TASK>
[    2.155528] Modules linked in: sctp
[    2.155566] CR2: 0000000000000000
[    2.155619] ---[ end trace 0000000000000000 ]---
[    2.155666] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.155714] 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
[    2.155855] RSP: 0018:ffffba95c024fbb8 EFLAGS: 00010046
[    2.155917] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.156018] RDX: ffffba95c024fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.156096] RBP: ffffba95c024fbf0 R08: ffffffffb4693e00 R09: 0000000000000101
[    2.156193] R10: ffffffffb52080d8 R11: ffffba95c00e4ff8 R12: 0000000000000000
[    2.156290] R13: ffffba95c024fce8 R14: 0000000000000020 R15: ffffba95c024fdf0
[    2.156376] FS:  0000000000000000(0000) GS:ffff8f6309211000(0000) knlGS:0000000000000000
[    2.156469] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.156528] CR2: 0000000000000000 CR3: 0000000005c89004 CR4: 0000000000772ef0
[    2.156588] PKRU: 55555554
[    2.156617] note: kworker/u16:1[66] exited with irqs disabled