linux-kernel - Re: [PATCH] z3fold: claim page in the beginning of free

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 for Android: free password hash cracker in your pocket

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

Message-Id: <20190926154834.132f40363f5805a7a5cb347a@linux-foundation.org>
Date:   Thu, 26 Sep 2019 15:48:34 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Vitaly Wool <vitalywool@...il.com>
Cc:     Linux-MM <linux-mm@...ck.org>, linux-kernel@...r.kernel.org,
        Markus Linnala <markus.linnala@...il.com>, stable@...nel.org,
        Dan Streetman <ddstreet@...e.org>,
        Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH] z3fold: claim page in the beginning of free

On Thu, 26 Sep 2019 10:48:44 +0200 Vitaly Wool <vitalywool@...il.com> wrote:

> There's a really hard to reproduce race in z3fold between
> z3fold_free() and z3fold_reclaim_page(). z3fold_reclaim_page()
> can claim the page after z3fold_free() has checked if the page
> was claimed and z3fold_free() will then schedule this page for
> compaction which may in turn lead to random page faults (since
> that page would have been reclaimed by then). Fix that by
> claiming page in the beginning of z3fold_free().
> 

I take it from the email headers that a

Cc: <stable@...r.kernel.org>

was intended?