linux-kernel - Re: 2.6.23-rc6-mm1: BUG kmalloc-16: Object padding overwritten (sysfs?)

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Message-ID: <Pine.LNX.4.64.0709191355340.3136@schroedinger.engr.sgi.com>
Date:	Wed, 19 Sep 2007 13:59:32 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Alexey Dobriyan <adobriyan@...ru>
cc:	Andrew Morton <akpm@...ux-foundation.org>, gregkh@...e.de,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.23-rc6-mm1: BUG kmalloc-16: Object padding overwritten
 (sysfs?)

On Wed, 19 Sep 2007, Andrew Morton wrote:

> > 	find /sys/slab | xargs cat

Hmmm... This works fine here. Doing the cat may trigger slab validation 
and show objects corruptions that were heretofore unnoticed.

Could you see if running

slabinfo -v

gives the same results?

> So do you beleive the bug lies in the /sys/slab implementation?

I would think that this is evidence of memory corruption occurring. The 
issues were detected while SLUB attempted to flush per cpu queues.
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