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] [thread-next>] [day] [month] [year] [list]
Date:   Thu, 7 Dec 2017 10:43:09 -0800
From:   Kees Cook <>
To:     Christopher Lameter <>
Cc:     Geert Uytterhoeven <>,
        Pekka Enberg <>,
        David Rientjes <>,
        Joonsoo Kim <>,
        Andrew Morton <>,
        "Tobin C . Harding" <>, Linux-MM <>,
        LKML <>,
        Linus Torvalds <>
Subject: Re: [PATCH] mm/slab: Do not hash pointers when debugging slab

On Thu, Dec 7, 2017 at 3:13 AM, Christopher Lameter <> wrote:
> On Thu, 7 Dec 2017, Geert Uytterhoeven wrote:
>> If CONFIG_DEBUG_SLAB/CONFIG_DEBUG_SLAB_LEAK are enabled, the slab code
>> prints extra debug information when e.g. corruption is detected.
>> This includes pointers, which are not very useful when hashed.
>> Fix this by using %px to print unhashed pointers instead.
> Acked-by: Christoph Lameter <>
> These SLAB config options are only used for testing so this is ok.

Most systems use SLUB so I can't say how common CONFIG_DEBUG_SLAB is.
(Though, FWIW with SLUB, CONFIG_SLUB_DEBUG is very common.)


Kees Cook
Pixel Security

Powered by blists - more mailing lists