From: David Rientjes <rientjes@google.com>
Date: Wed, 28 Jan 2009 02:59:46 +0000 (-0800)
Subject: slub: fix per cpu kmem_cache_cpu array memory leak
X-Git-Tag: v2.6.29-rc4~66^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3718909448116bf4411445468c58acc946379f92;p=pandora-kernel.git

slub: fix per cpu kmem_cache_cpu array memory leak

The per cpu array of kmem_cache_cpu structures accomodates
NR_KMEM_CACHE_CPU such structs.

When this array overflows and a struct is allocated by kmalloc(), it may
have an address at the upper bound of this array.  If this happens, it
does not get freed and the per cpu kmem_cache_cpu_free pointer will be out
of bounds after kmem_cache_destroy() or cpu offlining.

Cc: Christoph Lameter <cl@linux-foundation.org>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
---

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