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

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Message-ID: <1305021806.2614.17.camel@edumazet-laptop>
Date:	Tue, 10 May 2011 12:03:26 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Christoph Lameter <cl@...ux.com>, 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 mardi 10 mai 2011 à 12:47 +0300, Pekka Enberg a écrit :
> On 5/10/11 11:43 AM, Eric Dumazet wrote:
> > I am trying to follow things but honestly I am lost.
> > Isnt commit 1759415e63 planned for 2.6.40 ?
> > ( ref :
> > http://git.kernel.org/?p=linux/kernel/git/penberg/slab-2.6.git;a=commitdiff;h=1759415e630e5db0dd2390df9f94892cbfb9a8a2 )
> 
> Yes, it's for 2.6.40.
> 
> > How shall we fix things for 2.6.39 ? I thought my patch was OK for that.
> >
> 
> It's so late in the release cycle that I think the best option is to fix 
> it in 2.6.40 and backport it to -stable together with the above commit.
> 
> > Its a bit hard to work with you on this stuff, for a report I made ages
> > ago, I find it incredible its not yet fixed in linux-2.6.
> 
> It's not incredible, I simply managed to miss your patch. Sorry about that.
> 

Pekka, my word was probably too strong, sorry for that.

What I meant is I dont understand how Christoph expect to solve this
problem if irqsafe_cpu_cmpxchg_double() is used everywhere.




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