From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pekka Enberg <penberg@kernel.org>
Subject: Re: [Bugme-new] [Bug 33502] New: Caught 64-bit read from uninitialized
 memory in __alloc_skb
Date: Mon, 9 May 2011 23:06:12 +0300 (EEST)
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References: <bug-33502-10286@https.bugzilla.kernel.org/>  <20110418153852.153d3ed3.akpm@linux-foundation.org>  <1303181466.4152.39.camel@edumazet-laptop>  <1303182557.4152.48.camel@edumazet-laptop>  <1303183217.4152.49.camel@edumazet-laptop>
 <alpine.DEB.2.00.1104191210011.17888@router.home>  <1303244270.2756.3.camel@edumazet-laptop> <4DAE7579.3020400@cs.helsinki.fi>  <1303279470.2756.17.camel@edumazet-laptop>  <1303285519.4dae8f0fdf9b1@imp.free.fr>  <4DAE901C.2090809@cs.helsinki.fi>
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Cc: Eric Dumazet <eric.dumazet@gmail.com>,
	Pekka Enberg <penberg@cs.helsinki.fi>,
	casteyde.christian@free.fr,
	Andrew Morton <akpm@linux-foundation.org>,
	netdev@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org,
	bugme-daemon@bugzilla.kernel.org,
	Vegard Nossum <vegardno@ifi.uio.no>
To: Christoph Lameter <cl@linux.com>
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On Mon, 9 May 2011, Christoph Lameter wrote:
> There is still an issue and now you can no longer fix the thing through
> CONFIG_CMPXCHG_LOCAL.
>
> It needs to be legal for slub to deref the counter even if the object has
> been freed.

We can use kmemcheck_mark_initialized() for that.