From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 24 Mar 2010 21:25:47 +0000 (+0100)
Subject: slub: Potential stack overflow
X-Git-Tag: v2.6.35-rc1~421^2^6~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bbd7d57bfe852d9788bae5fb171c7edb4021d8ac;p=pandora-kernel.git

slub: Potential stack overflow

I discovered that we can overflow stack if CONFIG_SLUB_DEBUG=y and use slabs
with many objects, since list_slab_objects() and process_slab() use
DECLARE_BITMAP(map, page->objects).

With 65535 bits, we use 8192 bytes of stack ...

Switch these allocations to dynamic allocations.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
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