linux-kernel - Re: [PATCH] mm/mempolicy: Convert from atomic_t to refcount

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Message-ID: <CAMZfGtXFsxj9b--ZcZgAdcebeeMzivpmJPamBqtn76k4m0d3ZA@mail.gmail.com>
Date:   Wed, 21 Jul 2021 14:42:17 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     Xiyu Yang <xiyuyang19@...an.edu.cn>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Feng Tang <feng.tang@...el.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Ben Widawsky <ben.widawsky@...el.com>,
        Yanfei Xu <yanfei.xu@...driver.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        yuanxzhang@...an.edu.cn, Xin Tan <tanxin.ctf@...il.com>
Subject: Re: [PATCH] mm/mempolicy: Convert from atomic_t to refcount_t on mempolicy->refcnt

On Mon, Jul 19, 2021 at 4:34 PM Xiyu Yang <xiyuyang19@...an.edu.cn> wrote:
>
> refcount_t type and corresponding API can protect refcounters from
> accidental underflow and overflow and further use-after-free situations.
>
> Signed-off-by: Xiyu Yang <xiyuyang19@...an.edu.cn>
> Signed-off-by: Xin Tan <tanxin.ctf@...il.com>

Reviewed-by: Muchun Song <songmuchun@...edance.com>