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

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Message-ID: <20071114112001.GA13870@elte.hu>
Date:	Wed, 14 Nov 2007 12:20:01 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>, Matt Mackall <mpm@...enic.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [bug] SLOB crash, 2.6.24-rc2


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.

bisection is difficult due to networking releated Kconfig problems: if i 
put my .24 .config into .23 then the network drivers get lost. (we 
should be more Kconfig-compatible between kernel releases, to ease 
bisection efforts)

(full bootlog and config attached)

	Ingo

View attachment "crash.log" of type "text/plain" (166122 bytes)

View attachment "crash.log.config" of type "text/plain" (42018 bytes)