From: Oleg Nesterov <oleg@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: torvalds@linux-foundation.org, dhowells@redhat.com,
roland@redhat.com, jmorris@namei.org, tom.horsley@att.net,
linux-kernel@vger.kernel.org, stable@kernel.org
Subject: Re: [PATCH v3] exec: do not sleep in TASK_TRACED under ->cred_guard_mutex
Date: Fri, 4 Sep 2009 23:33:37 +0200 [thread overview]
Message-ID: <20090904213337.GA5021@redhat.com> (raw)
In-Reply-To: <20090904124230.5b7258c9.akpm@linux-foundation.org>
On 09/04, Andrew Morton wrote:
>
> On Fri, 4 Sep 2009 19:26:48 +0200
> Oleg Nesterov <oleg@redhat.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 get a reject in binfmts.h because your kernel has `extern void
> set_binfmt' and mine has `extern int set_binfmt'.
Ah, I have exec-fix-set_binfmt-vs-sys_delete_module-race.patch from -mm
applied...
> Hopefully this patch works OK in mainline as well as in whatever kernel
> you tested against!
Yes I tried to test it ;)
> 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.
Oleg.
next prev parent reply other threads:[~2009-09-04 21:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-03 16:05 [PATCH 1/1] exec: do not sleep in TASK_TRACED under ->cred_guard_mutex Oleg Nesterov
2009-09-03 20:09 ` Roland McGrath
2009-09-04 8:43 ` David Howells
2009-09-04 13:39 ` Oleg Nesterov
2009-09-04 14:47 ` David Howells
2009-09-04 15:49 ` Oleg Nesterov
2009-09-04 17:26 ` [PATCH v3] " Oleg Nesterov
2009-09-04 19:42 ` Andrew Morton
2009-09-04 21:33 ` Oleg Nesterov [this message]
2009-09-09 21:57 ` Chuck Ebbert
2009-09-09 22:58 ` Oleg Nesterov
2009-09-04 8:39 ` [PATCH 1/1] " David Howells
2009-09-04 9:24 ` Roland McGrath
2009-09-04 12:46 ` Oleg Nesterov
2009-09-04 13:39 ` David Howells
2009-09-04 13:55 ` Oleg Nesterov
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