linux-kernel - Re: your mail

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Message-ID: <84144f020702050601ve2e4746oebd774af9c487b63@mail.gmail.com>
Date:	Mon, 5 Feb 2007 16:01:23 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Joerg Roedel" <joerg.roedel@....com>
Cc:	logic@...nknet.ro, linux-kernel@...r.kernel.org
Subject: Re: your mail

Hi Joerg,

On 2/5/07, Joerg Roedel <joerg.roedel@....com> wrote:
> Hmm, this seems to be the same issue as in [1] and [2]. A page that is
> assumed to belong to the slab but is not longer marked as a slab page.
> Could this be a bug in the memory management?

The BUG_ON triggers whenever you feed an invalid pointer to kfree() or
kmem_cache_free() so I am guessing the caller is simply broken. Note
that kernels prior to 2.6.18 would quietly corrupt the slab unless
CONFIG_SLAB_DEBUG was enabled which might explain why this hasn't been
noticed before.

                               Pekka
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