linux-kernel - Re: [PATCH 11/19] kernel: convert cgroup_namespace.count from atomic_t to refcount

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Date:   Mon, 6 Mar 2017 14:55:58 -0500
From:   Tejun Heo <tj@...nel.org>
To:     Elena Reshetova <elena.reshetova@...el.com>
Cc:     linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
        linux-audit@...hat.com, linux-fsdevel@...r.kernel.org,
        peterz@...radead.org, gregkh@...uxfoundation.org,
        viro@...iv.linux.org.uk, mingo@...hat.com, hannes@...xchg.org,
        lizefan@...wei.com, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, paul@...l-moore.com,
        eparis@...hat.com, akpm@...ux-foundation.org, arnd@...db.de,
        luto@...nel.org, Hans Liljestrand <ishkamiel@...il.com>,
        Kees Cook <keescook@...omium.org>,
        David Windsor <dwindsor@...il.com>
Subject: Re: [PATCH 11/19] kernel: convert cgroup_namespace.count from
 atomic_t to refcount_t

On Mon, Feb 20, 2017 at 12:19:00PM +0200, Elena Reshetova wrote:
> refcount_t type and corresponding API should be
> used instead of atomic_t when the variable is used as
> a reference counter. This allows to avoid accidental
> refcounter overflows that might lead to use-after-free
> situations.
> 
> Signed-off-by: Elena Reshetova <elena.reshetova@...el.com>
> Signed-off-by: Hans Liljestrand <ishkamiel@...il.com>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> Signed-off-by: David Windsor <dwindsor@...il.com>

Applied to cgroup/for-4.12.

Thanks.

-- 
tejun