Re: [PATCH] misc: hpilo: Fix use after free bug in ilo_remove due to race condition with ilo_open

[Zheng Hacker]

Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> 于2023年4月18日周二 01:43写道：
>
> On Tue, Apr 18, 2023 at 12:52:46AM +0800, Zheng Wang wrote:
> > --- a/drivers/misc/hpilo.h
> > +++ b/drivers/misc/hpilo.h
> > @@ -62,6 +62,7 @@ struct ilo_hwinfo {
> >       spinlock_t fifo_lock;
> >
> >       struct cdev cdev;
> > +     struct kref refcnt;
>
> You now have 2 different structures doing reference counting logic on
> the same structure.  That's just not ok at all, and is totally broken.
>

Thanks for your reply. I'll look into it and figure out effective fix.

Best regards,
Zheng

> greg k-h