linux-kernel - Re: [PATCH V5] mm: fix use-after free of page

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: <20220826201941.de6ed957a0d6547b2d501c19@linux-foundation.org>
Date:   Fri, 26 Aug 2022 20:19:41 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Charan Teja Kalla <quic_charante@...cinc.com>
Cc:     <mhocko@...e.com>, <david@...hat.com>, <vbabka@...e.cz>,
        <pasha.tatashin@...een.com>, <shakeelb@...gle.com>,
        <sieberf@...zon.com>, <sjpark@...zon.de>,
        <william.kucharski@...cle.com>, <willy@...radead.org>,
        <quic_pkondeti@...cinc.com>, <minchan@...gle.com>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: [PATCH V5] mm: fix use-after free of page_ext after race with
 memory-offline

On Fri, 26 Aug 2022 12:26:33 +0530 Charan Teja Kalla <quic_charante@...cinc.com> wrote:

> The below is one path where race between page_ext and  offline of the
> respective memory blocks will cause use-after-free on the access of
> page_ext structure.

What are people's thoughts on a -stable backport?  It looks like the
bug has been there for years and the means of hitting it are obscure
and the patch isn't minor, so I'm thinking no?