linux-kernel - Re: [PATCH v2 1/2] mm/migrate: Fix read-only page got writable when recover pte

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Message-Id: <65FA2E7E-1F12-4919-BD79-11159934CF2C@gmail.com>
Date:   Thu, 10 Nov 2022 13:28:31 -0800
From:   Nadav Amit <nadav.amit@...il.com>
To:     Peter Xu <peterx@...hat.com>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Ives van Hoorne <ives@...esandbox.io>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>, stable@...r.kernel.org
Subject: Re: [PATCH v2 1/2] mm/migrate: Fix read-only page got writable when
 recover pte

On Nov 10, 2022, at 12:31 PM, Peter Xu <peterx@...hat.com> wrote:

> Ives van Hoorne from codesandbox.io reported an issue regarding possible
> data loss of uffd-wp when applied to memfds on heavily loaded systems.  The
> sympton is some read page got data mismatch from the snapshot child VMs.

symptom (if you care)

Other than that LGTM