[    2.007049] ip (251) used greatest stack depth: 12136 bytes left
[    2.043167] BUG: kernel NULL pointer dereference, address: 0000000000000000
[    2.043242] #PF: supervisor write access in kernel mode
[    2.043290] #PF: error_code(0x0002) - not-present page
[    2.043326] PGD 0 P4D 0 
[    2.043353] Oops: Oops: 0002 [#1] SMP
[    2.043382] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.18.0-rc5-virtme #1 PREEMPT(voluntary) 
[    2.043445] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    2.043491] Workqueue: netns cleanup_net
[    2.043534] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.043591] 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
[    2.043706] RSP: 0018:ffffc0880024fbb8 EFLAGS: 00010046
[    2.043736] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.043791] RDX: ffffc0880024fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.043845] RBP: ffffc0880024fbf0 R08: ffffffffa8493e00 R09: 0000000000000101
[    2.043890] R10: ffffffffa90080d8 R11: ffffc08800003ff8 R12: 0000000000000000
[    2.043944] R13: ffffc0880024fce8 R14: 0000000000000020 R15: ffffc0880024fdf0
[    2.043999] FS:  0000000000000000(0000) GS:ffff9a0655391000(0000) knlGS:0000000000000000
[    2.044053] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.044104] CR2: 0000000000000000 CR3: 0000000017e46001 CR4: 0000000000772ef0
[    2.044158] PKRU: 55555554
[    2.044178] Call Trace:
[    2.044202]  <TASK>
[    2.044227]  __cancel_work+0x29/0xe0
[    2.044256]  ? dev_deactivate_many+0x2c9/0x300
[    2.044300]  __cancel_work_sync+0x16/0x80
[    2.044331]  __dev_close_many+0x113/0x2b0
[    2.044374]  netif_close_many+0x98/0x160
[    2.044404]  unregister_netdevice_many_notify+0x1ea/0xaa0
[    2.044442]  default_device_exit_batch+0x29b/0x300
[    2.044484]  ? mutex_lock+0x12/0x30
[    2.044524]  ops_undo_list+0xec/0x1f0
[    2.044553]  cleanup_net+0x1b7/0x300
[    2.044588]  process_one_work+0x162/0x380
[    2.044621]  worker_thread+0x299/0x3c0
[    2.044652]  ? rescuer_thread+0x4c0/0x4c0
[    2.044681]  kthread+0x101/0x1f0
[    2.044721]  ? kthreads_online_cpu+0x110/0x110
[    2.044759]  ? kthreads_online_cpu+0x110/0x110
[    2.044797]  ret_from_fork+0x11c/0x140
[    2.044834]  ? kthreads_online_cpu+0x110/0x110
[    2.044872]  ret_from_fork_asm+0x11/0x20
[    2.044905]  </TASK>
[    2.044924] Modules linked in:
[    2.044955] CR2: 0000000000000000
[    2.044984] ---[ end trace 0000000000000000 ]---
[    2.045021] RIP: 0010:work_grab_pending+0x2f/0x1b0
[    2.045064] 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
[    2.045190] RSP: 0018:ffffc0880024fbb8 EFLAGS: 00010046
[    2.045228] RAX: 0000000000000246 RBX: 0000000000000000 RCX: 00000000ffffffff
[    2.045282] RDX: ffffc0880024fbf0 RSI: 0000000000000000 RDI: 0000000000000000
[    2.045335] RBP: ffffc0880024fbf0 R08: ffffffffa8493e00 R09: 0000000000000101
[    2.045392] R10: ffffffffa90080d8 R11: ffffc08800003ff8 R12: 0000000000000000
[    2.045439] R13: ffffc0880024fce8 R14: 0000000000000020 R15: ffffc0880024fdf0
[    2.045494] FS:  0000000000000000(0000) GS:ffff9a0655391000(0000) knlGS:0000000000000000
[    2.045547] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.045610] CR2: 0000000000000000 CR3: 0000000017e46001 CR4: 0000000000772ef0
[    2.045658] PKRU: 55555554
[    2.045680] note: kworker/u16:1[66] exited with irqs disabled

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