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Date: Fri, 11 Aug 2017 12:26:19 -0500 (CDT)
From: Christopher Lameter <>
To: Alexander Popov <>
cc: Kees Cook <>, 
    Andrew Morton <>, 
    Pekka Enberg <>, David Rientjes <>, 
    Joonsoo Kim <>, 
    Paul E McKenney <>, 
    Ingo Molnar <>, Tejun Heo <>, 
    Andy Lutomirski <>, 
    Nicolas Pitre <>,, 
    Rik van Riel <>, Tycho Andersen <>,,
Subject: Re: [linux-next][PATCH v2] mm/slub.c: add a naive detection of double
 free or corruption

On Fri, 11 Aug 2017, Alexander Popov wrote:

> Add an assertion similar to "fasttop" check in GNU C Library allocator
> as a part of SLAB_FREELIST_HARDENED feature. An object added to a singly
> linked freelist should not point to itself. That helps to detect some
> double free errors (e.g. CVE-2017-2636) without slub_debug and KASAN.

Acked-by: Christoph Lameter <>

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