linux-kernel - Re: [PATCH 17/23] hugetlb/userfaultfd: Handle UFFDIO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <35d6d357-df2d-66fb-2885-af5ff35a1aa0@oracle.com>
Date:   Thu, 22 Apr 2021 11:22:58 -0700
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Peter Xu <peterx@...hat.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Cc:     "Kirill A . Shutemov" <kirill@...temov.name>,
        Jerome Glisse <jglisse@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Hugh Dickins <hughd@...gle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>
Subject: Re: [PATCH 17/23] hugetlb/userfaultfd: Handle UFFDIO_WRITEPROTECT

On 3/22/21 5:49 PM, Peter Xu wrote:
> This starts from passing cp_flags into hugetlb_change_protection() so hugetlb
> will be able to handle MM_CP_UFFD_WP[_RESOLVE] requests.
> 
> huge_pte_clear_uffd_wp() is introduced to handle the case where the
> UFFDIO_WRITEPROTECT is requested upon migrating huge page entries.
> 
> Signed-off-by: Peter Xu <peterx@...hat.com>
> ---
>  include/asm-generic/hugetlb.h |  5 +++++
>  include/linux/hugetlb.h       |  6 ++++--
>  mm/hugetlb.c                  | 13 ++++++++++++-
>  mm/mprotect.c                 |  3 ++-
>  mm/userfaultfd.c              |  8 ++++++++
>  5 files changed, 31 insertions(+), 4 deletions(-)

Thanks,

Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>

-- 
Mike Kravetz