linux-kernel - Re: [PATCH v3] exec: do not sleep in TASK_TRACED under ->cred_guard

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Date:	Wed, 9 Sep 2009 17:57:49 -0400
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	torvalds@...ux-foundation.org, dhowells@...hat.com,
	roland@...hat.com, jmorris@...ei.org, tom.horsley@....net,
	linux-kernel@...r.kernel.org, stable@...nel.org
Subject: Re: [PATCH v3] exec: do not sleep in TASK_TRACED under
 ->cred_guard_mutex

On Fri, 4 Sep 2009 23:33:37 +0200
Oleg Nesterov <oleg@...hat.com> wrote:

> On 09/04, Andrew Morton wrote:
> >
> > On Fri, 4 Sep 2009 19:26:48 +0200
> > Oleg Nesterov <oleg@...hat.com> wrote:
> >
> > > Tom Horsley reports that his debugger hangs when it tries to read
> > > /proc/pid_of_tracee/maps, this happens since
> > >
> > > 	"mm_for_maps: take ->cred_guard_mutex to fix the race with exec"
> > > 	04b836cbf19e885f8366bccb2e4b0474346c02d
> > >
> > > commit in 2.6.31.

> 
> > I see a Cc:stable in the mail headers, but not in the changelog.  I
> > don't think the patch is applicable to -stable unless we miss 2.6.31.
> 
> -stable has the same problems but I agree, it can live without this fix.
> 

That patch was backported in 2.6.30.5 -- are you sure -stable doesn't need
this fix?
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