linux-kernel - Re: [PATCH 0/2] Fix two above-47bit hint address vs. THP bugs

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: <20191223231638.cbewgy7lfx74txde@box>
Date:   Tue, 24 Dec 2019 02:16:38 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     "Willhalm, Thomas" <thomas.willhalm@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        "Bruggeman, Otto G" <otto.g.bruggeman@...el.com>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.vnet.ibm.com>,
        linux-mm@...ck.org, x86@...nel.org, linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH 0/2] Fix two above-47bit hint address vs. THP bugs

On Mon, Dec 23, 2019 at 02:25:52PM -0800, Andrew Morton wrote:
> On Fri, 20 Dec 2019 17:25:46 +0300 "Kirill A. Shutemov" <kirill@...temov.name> wrote:
> 
> > The two get_unmapped_area() implementations have to be fixed to provide
> > THP-friendly mappings if above-47bit hint address is specified.
> > 
> 
> Do we need a cc:stable for these?

Yes, please. Otherwise users that use above-47bit hint would regress on
number of PMD-mapped THPs.

But it's not urgent. It's okay to cook it up in linux-next for a while.

-- 
 Kirill A. Shutemov