linux-kernel - Re: [PATCH] mm/uffd: Reset write protection when unregister with wp-mode

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Message-Id: <20220811141144.6aa509e68c5c7cd8b6c131b6@linux-foundation.org>
Date:   Thu, 11 Aug 2022 14:11:44 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Peter Xu <peterx@...hat.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        David Hildenbrand <david@...hat.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>
Subject: Re: [PATCH] mm/uffd: Reset write protection when unregister with
 wp-mode

On Thu, 11 Aug 2022 16:13:40 -0400 Peter Xu <peterx@...hat.com> wrote:

> I added a Fixes upon introducing of uffd-wp shmem+hugetlbfs because that's
> the only issue reported so far and that's the commit David's reproducer
> will start working (v5.19+).  But the whole idea actually applies to not
> only file memories but also anonymous.  It's just that we don't need to fix
> anonymous prior to v5.19- because there's no known way to exploit.

I added a cc:stable to this.