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

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Message-ID: <alpine.DEB.2.00.1104200904440.8634@router.home>
Date:	Wed, 20 Apr 2011 09:05:43 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Eric Dumazet <eric.dumazet@...il.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

On Wed, 20 Apr 2011, Eric Dumazet wrote:

> > Then, just disable SLUB_CMPXCHG_DOUBLE if KMEMCHECK is defined, as I did in my first patch.

Ok your first patch seems to be the sanest approach.

>  {
> @@ -1889,16 +1895,18 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
>  	struct kmem_cache_cpu *c;
>  #ifdef CONFIG_CMPXCHG_LOCAL
>  	unsigned long tid;
> -#else
> +#endif
> +#ifdef MASK_IRQ_IN_SLAB_ALLOC
>  	unsigned long flags;
>  #endif
>

Yea well that does not bring us much.
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