linux-kernel - Re: [PATCH v10 1/3] mm: Shuffle initial free memory to improve memory-side-cache utilization

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: <20190205232935.GL21860@bombadil.infradead.org>
Date:   Tue, 5 Feb 2019 15:29:35 -0800
From:   Matthew Wilcox <willy@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Michal Hocko <mhocko@...e.com>, Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Keith Busch <keith.busch@...el.com>
Subject: Re: [PATCH v10 1/3] mm: Shuffle initial free memory to improve
 memory-side-cache utilization

On Tue, Feb 05, 2019 at 11:11:06PM +0000, Kees Cook wrote:
> FWIW, distros have enabled it by default for a while. Here's Ubuntu,
> for example:
> 
> and Fedora too:

Also Debian:

$ grep SLAB_FREELIST /boot/config-4.19.0-1-amd64
CONFIG_SLAB_FREELIST_RANDOM=y
CONFIG_SLAB_FREELIST_HARDENED=y

linux (4.15.4-1) unstable; urgency=medium
  * Switch to SLUB as kernel allocator. (Closes: #862718)
    - Enable SLUB_DEBUG, SLAB_FREELIST_HARDENED except on armel/marvell.
      (Closes: #883069)