linux-kernel - Re: [PATCH 1/2] slub: fix leakage

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Message-ID: <Pine.LNX.4.64.0711031932020.15611@blonde.wat.veritas.com>
Date:	Sat, 3 Nov 2007 19:35:29 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Christoph Lameter <clameter@....com>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] slub: fix leakage

On Sat, 3 Nov 2007, Christoph Lameter wrote:
> On Sat, 3 Nov 2007, Hugh Dickins wrote:
> > On Sat, 3 Nov 2007, Christoph Lameter wrote:
> > > On Sat, 3 Nov 2007, Hugh Dickins wrote:
> > > 
> > > > Which fixes the leakage: Objects and Partials then remain stable.
> > > 
> > > Well this code is just an optimization for a rare case.
> > > Your patch may not handle the debug situation the right way.
> > 
> > Oh?  How?
> 
> If SLAB_DEBUG is set then your patch does not do the proper checks for the 
> object, tracing information is not written and the poisoning is not done. 
> See alloc_debug_processing().

Yup, you're right, thanks.

I'll followup that version I CC'ed to stable,
to stop it and say you'll supply a corrected version.

Hugh
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