linux-kernel - RE: [PATCH 0/5] sched refcount

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Message-ID: <2236FBA76BA1254E88B949DDB74E612BA4B872C9@IRSMSX102.ger.corp.intel.com>
Date:   Fri, 18 Jan 2019 17:41:32 +0000
From:   "Reshetova, Elena" <elena.reshetova@...el.com>
To:     Andrea Parri <andrea.parri@...rulasolutions.com>
CC:     "mingo@...hat.com" <mingo@...hat.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>
Subject: RE: [PATCH 0/5] sched refcount_t conversions

> On Fri, Jan 18, 2019 at 02:27:25PM +0200, Elena Reshetova wrote:
> > I would really love finally to merge these old patches
> > (now rebased on top of linux-next/master as of last friday),
> > since as far as I remember none has raised any more concerns
> > on them.
> >
> > refcount_t has been now successfully used in kernel in many places,
> > helped to detect bugs and mistakes in logic of refcounters.
> >
> > This series, for scheduler and task struct specifically,
> > replaces atomic_t reference counters with the new refcount_t type
> > and API (see include/linux/refcount.h).
> > By doing this we prevent intentional or accidental
> > underflows or overflows that can lead to use-after-free vulnerabilities.
> >
> > The patches are fully independent and can be cherry-picked separately.
> > More information about each conversion in each patch separately.
> >
> > Elena Reshetova (5):
> >   sched: convert sighand_struct.count to refcount_t
> >   sched: convert signal_struct.sigcnt to refcount_t
> >   sched: convert numa_group.refcount to refcount_t
> >   sched/task_struct: convert task_struct.usage to refcount_t
> >   sched/task_struct: convert task_struct.stack_refcount to refcount_t
> 
> For the series, please feel free to add:
> 
> Reviewed-by: Andrea Parri <andrea.parri@...rulasolutions.com>

Thank you for your review!

Best Regards,
Elena