linux-kernel - Re: Redzone overwritten with CONFIG

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Message-ID: <20080527151136.GA20750@alice>
Date:	Tue, 27 May 2008 17:11:36 +0200
From:	Eric Sesterhenn <snakebyte@....de>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	linux-kernel@...r.kernel.org, Chris Wright <chrisw@...s-sol.org>,
	James Morris <jmorris@...ei.org>,
	William Lee Irwin III <wli@...omorphy.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vegard Nossum <vegard.nossum@...il.com>
Subject: Re: Redzone overwritten with CONFIG_SECURITY

* Pekka Enberg (penberg@...helsinki.fi) wrote:
> (added some cc's)
> 
> On Mon, May 26, 2008 at 5:34 PM, Eric Sesterhenn <snakebyte@....de> wrote:
> > i enabled CONFIG_SECURITY on current git and get tons of
> > Redzone overwritten errors during early boot, even
> > with CONFIG_SECURITY_CAPABILITIES and CONFIG_SECURITY_NETWORK
> > disabled. After a while it ends with a kernel panic
> > saying: not syncing: Out of memory and no killable process...
> > Root partition is ext3 format.
> 
> So what kernel version is this and what's the last known version that
> worked? As it's early boot crash, maybe you can try to do git bisect
> on it?


this is 2.6.26-rc4, i didnt test any earlier versions so far
(ok, i did test some pre -rc4 git versions i think 4 days
ago, but they also showed the problem) this is the
first time that i enabled CONFIG_SECURITY on my testbox.

I am currently trying to reproduce this with SLAB as Vegard
suggested for the kmemcheck report. After this I'll retest this
on a fresh tree to make sure it isnt something buggy on my part
and try some older kernels.

Greetings, Eric
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