From: Oleg Nesterov <oleg@redhat.com>
To: tip-bot for Mike Galbraith <efault@gmx.de>
Cc: linux-tip-commits@vger.kernel.org, linux-kernel@vger.kernel.org,
hpa@zytor.com, mingo@redhat.com, a.p.zijlstra@chello.nl,
tglx@linutronix.de, mingo@elte.hu
Subject: Re: [tip:sched/core] sched, autogroup: Fix reference leak
Date: Tue, 4 Jan 2011 15:57:22 +0100 [thread overview]
Message-ID: <20110104145722.GA5812@redhat.com> (raw)
In-Reply-To: <tip-101e5f77bf35679809586e250b6c62193d2ed179@git.kernel.org>
On 01/04, tip-bot for Mike Galbraith wrote:
>
> The cgroup exit mess also uncovered a struct autogroup reference leak.
> copy_process() was simply freeing vs putting the signal_struct,
> stranding a reference.
>
> Signed-off-by: Mike Galbraith <efault@gmx.de>
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Oleg Nesterov <oleg@redhat.com>
> LKML-Reference: <1293784350.6839.2.camel@marge.simson.net>
> Signed-off-by: Ingo Molnar <mingo@elte.hu>
> ---
> kernel/fork.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/kernel/fork.c b/kernel/fork.c
> index b6f2475..0672444 100644
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -1317,7 +1317,7 @@ bad_fork_cleanup_mm:
> }
> bad_fork_cleanup_signal:
> if (!(clone_flags & CLONE_THREAD))
> - free_signal_struct(p->signal);
> + put_signal_struct(p->signal);
Well, free_signal_struct() was correct. Without CLONE_THREAD
sig->sigcnt must be equal to 1.
But yes, autogroup puts sched_autogroup_exit() into put_signal_struct(),
so this patch looks fine.
Although I must admit, to me it would be more clean to simply move
sched_autogroup_exit() from put_signal_struct() into free_signal_struct()
instead.
Oleg.
next prev parent reply other threads:[~2011-01-04 15:04 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-29 7:10 [PATCH] avoid race condition in pick_next_task_fair in shenghui
2010-06-29 7:10 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c shenghui
2010-06-29 10:43 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-06-29 10:43 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-06-29 11:24 ` [PATCH] avoid race condition in pick_next_task_fair in shenghui
2010-06-29 11:24 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c shenghui
2010-06-29 11:35 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-06-29 11:35 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-06-29 12:44 ` [PATCH] avoid race condition in pick_next_task_fair in shenghui
2010-06-29 12:44 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c shenghui
2010-12-19 2:03 ` [PATCH] avoid race condition in pick_next_task_fair in Miklos Vajna
2010-12-19 2:03 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Miklos Vajna
2010-12-22 0:22 ` [PATCH] avoid race condition in pick_next_task_fair in Miklos Vajna
2010-12-22 0:22 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Miklos Vajna
2010-12-22 8:29 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 8:29 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-22 8:41 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 8:41 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-22 8:41 ` [PATCH] avoid race condition in pick_next_task_fair in Mike Galbraith
2010-12-22 8:41 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Mike Galbraith
2010-12-22 9:07 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 9:07 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-22 13:31 ` [PATCH] avoid race condition in pick_next_task_fair in Miklos Vajna
2010-12-22 13:31 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Miklos Vajna
2010-12-22 14:00 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 14:00 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-22 14:11 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 14:11 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-22 15:14 ` [PATCH] avoid race condition in pick_next_task_fair in Miklos Vajna
2010-12-22 15:14 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Miklos Vajna
2010-12-22 15:25 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 15:25 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-22 17:08 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 17:08 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-22 17:16 ` [PATCH] avoid race condition in pick_next_task_fair in Ingo Molnar
2010-12-22 17:16 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Ingo Molnar
2010-12-22 17:25 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 17:25 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-22 20:36 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-22 20:36 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-23 2:08 ` Yong Zhang
2010-12-23 2:08 ` Yong Zhang
2010-12-23 12:12 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-23 12:12 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-23 12:33 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-23 12:33 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
2010-12-23 18:24 ` [PATCH] avoid race condition in pick_next_task_fair in Peter Zijlstra
2010-12-23 18:24 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Peter Zijlstra
[not found] ` <1293132304.6798.6.camel@marge.simson.net>
[not found] ` <1293132862.25981.22.camel@laptop>
[not found] ` <1293187425.7138.2.camel@marge.simson.net>
[not found] ` <1293188091.25981.200.camel@laptop>
[not found] ` <1293192999.18035.4.camel@marge.simson.net>
2010-12-24 15:59 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Peter Zijlstra
2010-12-24 15:59 ` Peter Zijlstra
2010-12-24 16:40 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Miklos Vajna
2010-12-24 16:40 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Miklos Vajna
2010-12-24 16:48 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Mike Galbraith
2010-12-24 16:48 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Mike Galbraith
2010-12-24 17:07 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Peter Zijlstra
2010-12-24 17:07 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Peter Zijlstra
2010-12-24 17:24 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Mike Galbraith
2010-12-24 17:24 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Mike Galbraith
2010-12-25 17:55 ` Balbir Singh
2010-12-25 18:07 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Balbir Singh
2010-12-25 20:59 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Paul Menage
2011-01-03 7:06 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Peter Zijlstra
2011-01-03 7:06 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Peter Zijlstra
2010-12-29 15:25 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Ingo Molnar
2010-12-29 15:25 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Ingo Molnar
2010-12-29 23:07 ` Miklos Vajna
2010-12-31 10:04 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Mike Galbraith
2010-12-31 10:04 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Mike Galbraith
2010-12-31 10:46 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free Miklos Vajna
2010-12-31 10:46 ` [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Miklos Vajna
2010-12-31 8:32 ` [PATCH] Re: [PATCH] sched, cgroup: Use exit hook to avoid Mike Galbraith
2010-12-31 8:32 ` [PATCH] Re: [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Mike Galbraith
2011-01-03 8:21 ` [PATCH] Re: [PATCH] sched, cgroup: Use exit hook to avoid Peter Zijlstra
2011-01-03 8:21 ` [PATCH] Re: [PATCH] sched, cgroup: Use exit hook to avoid use-after-free crash Peter Zijlstra
2011-01-04 14:19 ` [tip:sched/core] sched, autogroup: Fix reference leak tip-bot for Mike Galbraith
2011-01-04 14:57 ` Oleg Nesterov [this message]
2011-01-04 19:06 ` Mike Galbraith
2011-01-19 19:04 ` [tip:sched/urgent] sched, cgroup: Use exit hook to avoid use-after-free crash tip-bot for Peter Zijlstra
2010-12-22 21:11 ` [PATCH] avoid race condition in pick_next_task_fair in Miklos Vajna
2010-12-22 21:11 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Miklos Vajna
2010-12-22 23:39 ` [PATCH] avoid race condition in pick_next_task_fair in Miklos Vajna
2010-12-22 23:39 ` [PATCH] avoid race condition in pick_next_task_fair in kernel/sched_fair.c Miklos Vajna
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