linux-kernel - Re: [bug, netconsole, SLUB] BUG skbuff_head

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Message-ID: <4880A0EF.9030006@linux-foundation.org>
Date:	Fri, 18 Jul 2008 08:55:59 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Pekka J Enberg <penberg@...helsinki.fi>
CC:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, Vegard Nossum <vegard.nossum@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, davem@...emloft.net,
	johnpol@....mipt.ru
Subject: Re: [bug, netconsole, SLUB] BUG skbuff_head_cache: Poison overwritten


>> INFO: 0xf658ae9c-0xf658ae9c. First byte 0x6a instead of 0x6b
> 
> 0x6b is POISON_FREE so 0x6a is one bit corruption.

Typically this means that a refcount at the head of the object was decremented. But the object was already freed.
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