linux-kernel - Re: [bug] SLOB crash, 2.6.24-rc2

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Message-ID: <20071114173611.GR19691@waste.org>
Date:	Wed, 14 Nov 2007 11:36:12 -0600
From:	Matt Mackall <mpm@...enic.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [bug] SLOB crash, 2.6.24-rc2

On Wed, Nov 14, 2007 at 12:20:01PM +0100, Ingo Molnar wrote:
> 
> there's a new SLOB regression - the attached config crashes with:
> 
> [   61.245190] rc.sysinit used greatest stack depth: 1680 bytes left
> [   61.386859] list_add corruption. prev->next should be next (407d973c), but was 418cf818. (prev=41877098).
> [   61.396328] ------------[ cut here ]------------
> [   61.400910] kernel BUG at lib/list_debug.c:33!
> [   61.405330] invalid opcode: 0000 [#1] DEBUG_PAGEALLOC
> 
> looks like memory corruption of some sort and it's reproducible. Picking 
> CONFIG_SLUB makes the crash go away. Booting v2.6.23 with the same 
> .config works fine.

Hmmm, the changes in SLOB since v2.6.23 are all trivial. I'll try to
reproduce it with your config, but it doesn't seem promising.

-- 
Mathematics is the supreme nostalgia of our time.
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