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Date: Tue, 15 Feb 2011 14:21:11 -0800 (PST)
From: David Rientjes <rientjes@google.com>
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To: Pekka Enberg <penberg@kernel.org>
cc: Eric Dumazet <eric.dumazet@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>, netdev@vger.kernel.org,
        bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org,
        casteyde.christian@free.fr, Changli Gao <xiaosuo@gmail.com>,
        Vegard Nossum <vegardno@ifi.uio.no>,
        David Miller <davem@davemloft.net>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Christoph Lameter <cl@linux.com>
Subject: Re: [Bugme-new] [Bug 27212] New: Warning kmemcheck: Caught 64-bit
 read from uninitialized memory in netlink_broadcast_filtered
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References: <bug-27212-10286@https.bugzilla.kernel.org/> <20110120122549.85863a84.akpm@linux-foundation.org> <1295556085.2613.22.camel@edumazet-laptop> <4D393A99.9060104@kernel.org> <1297704922.2996.60.camel@edumazet-laptop>
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On Tue, 15 Feb 2011, Pekka Enberg wrote:

> > [PATCH] slub: fix kmemcheck calls to match ksize() hints
> >
> > Recent use of ksize() in network stack (commit ca44ac38 : net: don't
> > reallocate skb->head unless the current one hasn't the needed extra size
> > or is shared) triggers kmemcheck warnings, because ksize() can return
> > more space than kmemcheck is aware of.
> >
> > Pekka Enberg noticed SLAB+kmemcheck is doing the right thing, while SLUB
> > +kmemcheck doesnt.
> >
> > Bugzilla reference #27212
> >
> > Reported-by: Christian Casteyde <casteyde.christian@free.fr>
> > Suggested-by: Pekka Enberg <penberg@kernel.org>
> > Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
> > CC: David Miller <davem@davemloft.net>
> > CC: Changli Gao <xiaosuo@gmail.com>
> > CC: Andrew Morton <akpm@linux-foundation.org>

Acked-by: David Rientjes <rientjes@google.com>