linux-kernel - Re: [PATCH 2/3] posix_timer: fix error path in timer

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Message-ID: <alpine.LFD.2.00.1005202246140.3368@localhost.localdomain>
Date:	Thu, 20 May 2010 22:46:56 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Andrey Vagin <avagin@...nvz.org>, linux-kernel@...r.kernel.org,
	stable@...nel.org, Oleg Nesterov <oleg@...sign.ru>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Stanislaw Gruszka <sgruszka@...hat.com>
Subject: Re: [PATCH 2/3] posix_timer: fix error path in timer_create

On Thu, 20 May 2010, Andrew Morton wrote:

> On Mon, 17 May 2010 21:18:07 +0400
> Andrey Vagin <avagin@...nvz.org> wrote:
> 
> > move CLOCK_DISPATCH(which_clock, timer_create, (new_timer)) after all
> > posible EFAULT erros.
> > 
> > *_timer_create may allocate/get resources.
> > (for example posix_cpu_timer_create does get_task_struct)
> > 
> 
> You've added a Cc:stable@...nel.org to the mail headers, but there is
> no "Cc: <stable@...nel.org>" in the changelog.  Please, if you think a
> patch should go into -stable then add the tag to the changelog also -
> this is more reliable and explicit than spraying things at a mailing
> list.
> 
> You cc'ed stable@...nel.org on all three patches but IMO only [2/3]
> (this patch) is needed in -stable.
> 
> And afaict, the bug which this patch fixes will allow a suitably-nasty
> unprivileged application to leak an unbounded number of task-structs,
> which is a box-killing local DoS.  So yes, -stable wants this.

I'm adding it to 2/3 only. Have that lot queued up already.

Thanks,

	tglx

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