From: Christoph Lameter <cl@linux.com>
To: james_p_freyensee@linux.intel.com
Cc: linux-mm@kvack.org, gregkh@suse.de, hari.k.kanigeri@intel.com
Subject: Re: [PATCH] kernel buffer overflow kmalloc_slab() fix
Date: Thu, 19 May 2011 15:51:58 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1105191550001.12530@router.home> (raw)
In-Reply-To: <1305834712-27805-2-git-send-email-james_p_freyensee@linux.intel.com>
On Thu, 19 May 2011, james_p_freyensee@linux.intel.com wrote:
> From: J Freyensee <james_p_freyensee@linux.intel.com>
>
> Currently, kmalloc_index() can return -1, which can be
> passed right to the kmalloc_caches[] array, cause a
No kmalloc_index() cannot return -1 for the use case that you are
considering here. The value passed as a size to
kmalloc_slab is bounded by 2 * PAGE_SIZE and kmalloc_slab will only return
-1 for sizes > 4M. So we will have to get machines with page sizes > 2M
before this can be triggered.
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next prev parent reply other threads:[~2011-05-19 20:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 19:51 james_p_freyensee
2011-05-19 20:51 ` Christoph Lameter [this message]
2011-05-19 21:14 ` J Freyensee
2011-05-19 21:24 ` Christoph Lameter
2011-05-19 22:19 ` J Freyensee
2011-05-20 14:32 ` Christoph Lameter
2011-05-20 12:02 ` James Bottomley
2011-05-20 14:33 ` Christoph Lameter
2011-05-20 14:42 ` Christoph Lameter
2011-05-20 18:02 ` J Freyensee
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