netdev - Re: [Bugme-new] [Bug 33502] New: Caught 64-bit read from uninitialized memory in __alloc

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Message-ID: <1303313433.3186.110.camel@edumazet-laptop>
Date:	Wed, 20 Apr 2011 17:30:33 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Pekka Enberg <penberg@...helsinki.fi>, casteyde.christian@...e.fr,
	Andrew Morton <akpm@...ux-foundation.org>,
	netdev@...r.kernel.org, bugzilla-daemon@...zilla.kernel.org,
	bugme-daemon@...zilla.kernel.org,
	Vegard Nossum <vegardno@....uio.no>
Subject: Re: [Bugme-new] [Bug 33502] New: Caught 64-bit read from
 uninitialized memory in __alloc_skb

Le mercredi 20 avril 2011 à 10:17 -0500, Christoph Lameter a écrit :
> On Wed, 20 Apr 2011, Eric Dumazet wrote:
> 
> > [PATCH v4] slub: dont use cmpxchg_double if KMEMCHECK or DEBUG_PAGEALLOC
> 
> Acked-by: Christoph Lameter <cl@...ux.com>
> 
> >
> > -#ifdef CONFIG_CMPXCHG_LOCAL
> > +#if defined(CONFIG_CMPXCHG_LOCAL) && !defined(CONFIG_KMEMCHECK) && \
> > +				     !defined(CONFIG_DEBUG_PAGEALLOC)
> > +#define SLUB_USE_CMPXCHG_DOUBLE
> 
> #undef CONFIG_CMPXCHG_LOCAL instead? Would reduce patch size but its kind
> of hacky.
> 

Well, its definitely hacky :)

I chose a local definition (instead of Kconfig game), referring to
cmpxchg_double()



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