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From: Anton Vorontsov <anton.vorontsov@linaro.org>
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/9] Fixes for common mistakes w/ for_each_process and task->mm
Date: Mon, 23 Apr 2012 07:06:41 +0000	[thread overview]
Message-ID: <20120423070641.GA27702@lizard> (raw)

Hi all,

This is another resend of several task->mm fixes, the bugs I found
during LMK code audit. Architectures were traverse the tasklist
in an unsafe manner, plus there are a few cases of unsafe access to
task->mm in general.

There were no objections on the previous resend, and the final words
were somewhere along "the patches are fine" line.

In v3:
- Dropped a controversal 'Make find_lock_task_mm() sparse-aware' patch;
- Reword arm and sh commit messages, per Oleg Nesterov's suggestions;
- Added an optimization trick in clear_tasks_mm_cpumask(): take only
  the rcu read lock, no need for the whole tasklist_lock.
  Suggested by Peter Zijlstra.

In v2: 
- introduced a small helper in cpu.c: most arches duplicate the
  same [buggy] code snippet, so it's better to fix it and move the
  logic into a common function.

Thanks,

-- 
Anton Vorontsov
Email: cbouatmailru@gmail.com

WARNING: multiple messages have this Message-ID (diff)
From: Anton Vorontsov <anton.vorontsov@linaro.org>
To: Andrew Morton <akpm@linux-foundation.org>,
	Oleg Nesterov <oleg@redhat.com>
Cc: Russell King <linux@arm.linux.org.uk>,
	Mike Frysinger <vapier@gentoo.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Richard Weinberger <richard@nod.at>,
	Paul Mundt <lethal@linux-sh.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	John Stultz <john.stultz@linaro.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	uclinux-dist-devel@blackfin.uclinux.org,
	linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org,
	user-mode-linux-devel@lists.sourceforge.net, linux-mm@kvack.org,
	linaro-kernel@lists.linaro.org, patches@linaro.org
Subject: [PATCH v3 0/9] Fixes for common mistakes w/ for_each_process and task->mm
Date: Mon, 23 Apr 2012 00:06:41 -0700	[thread overview]
Message-ID: <20120423070641.GA27702@lizard> (raw)

Hi all,

This is another resend of several task->mm fixes, the bugs I found
during LMK code audit. Architectures were traverse the tasklist
in an unsafe manner, plus there are a few cases of unsafe access to
task->mm in general.

There were no objections on the previous resend, and the final words
were somewhere along "the patches are fine" line.

In v3:
- Dropped a controversal 'Make find_lock_task_mm() sparse-aware' patch;
- Reword arm and sh commit messages, per Oleg Nesterov's suggestions;
- Added an optimization trick in clear_tasks_mm_cpumask(): take only
  the rcu read lock, no need for the whole tasklist_lock.
  Suggested by Peter Zijlstra.

In v2: 
- introduced a small helper in cpu.c: most arches duplicate the
  same [buggy] code snippet, so it's better to fix it and move the
  logic into a common function.

Thanks,

-- 
Anton Vorontsov
Email: cbouatmailru@gmail.com

WARNING: multiple messages have this Message-ID (diff)
From: Anton Vorontsov <anton.vorontsov@linaro.org>
To: Andrew Morton <akpm@linux-foundation.org>,
	Oleg Nesterov <oleg@redhat.com>
Cc: linaro-kernel@lists.linaro.org,
	Mike Frysinger <vapier@gentoo.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	user-mode-linux-devel@lists.sourceforge.net,
	linux-sh@vger.kernel.org, Richard Weinberger <richard@nod.at>,
	patches@linaro.org, linux-kernel@vger.kernel.org,
	uclinux-dist-devel@blackfin.uclinux.org, linux-mm@kvack.org,
	Paul Mundt <lethal@linux-sh.org>,
	John Stultz <john.stultz@linaro.org>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	Russell King <linux@arm.linux.org.uk>,
	linuxppc-dev@lists.ozlabs.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/9] Fixes for common mistakes w/ for_each_process and task->mm
Date: Mon, 23 Apr 2012 00:06:41 -0700	[thread overview]
Message-ID: <20120423070641.GA27702@lizard> (raw)

Hi all,

This is another resend of several task->mm fixes, the bugs I found
during LMK code audit. Architectures were traverse the tasklist
in an unsafe manner, plus there are a few cases of unsafe access to
task->mm in general.

There were no objections on the previous resend, and the final words
were somewhere along "the patches are fine" line.

In v3:
- Dropped a controversal 'Make find_lock_task_mm() sparse-aware' patch;
- Reword arm and sh commit messages, per Oleg Nesterov's suggestions;
- Added an optimization trick in clear_tasks_mm_cpumask(): take only
  the rcu read lock, no need for the whole tasklist_lock.
  Suggested by Peter Zijlstra.

In v2: 
- introduced a small helper in cpu.c: most arches duplicate the
  same [buggy] code snippet, so it's better to fix it and move the
  logic into a common function.

Thanks,

-- 
Anton Vorontsov
Email: cbouatmailru@gmail.com

WARNING: multiple messages have this Message-ID (diff)
From: anton.vorontsov@linaro.org (Anton Vorontsov)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/9] Fixes for common mistakes w/ for_each_process and task->mm
Date: Mon, 23 Apr 2012 00:06:41 -0700	[thread overview]
Message-ID: <20120423070641.GA27702@lizard> (raw)

Hi all,

This is another resend of several task->mm fixes, the bugs I found
during LMK code audit. Architectures were traverse the tasklist
in an unsafe manner, plus there are a few cases of unsafe access to
task->mm in general.

There were no objections on the previous resend, and the final words
were somewhere along "the patches are fine" line.

In v3:
- Dropped a controversal 'Make find_lock_task_mm() sparse-aware' patch;
- Reword arm and sh commit messages, per Oleg Nesterov's suggestions;
- Added an optimization trick in clear_tasks_mm_cpumask(): take only
  the rcu read lock, no need for the whole tasklist_lock.
  Suggested by Peter Zijlstra.

In v2: 
- introduced a small helper in cpu.c: most arches duplicate the
  same [buggy] code snippet, so it's better to fix it and move the
  logic into a common function.

Thanks,

-- 
Anton Vorontsov
Email: cbouatmailru at gmail.com

WARNING: multiple messages have this Message-ID (diff)
From: Anton Vorontsov <anton.vorontsov@linaro.org>
To: Andrew Morton <akpm@linux-foundation.org>,
	Oleg Nesterov <oleg@redhat.com>
Cc: Russell King <linux@arm.linux.org.uk>,
	Mike Frysinger <vapier@gentoo.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Richard Weinberger <richard@nod.at>,
	Paul Mundt <lethal@linux-sh.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
	John Stultz <john.stultz@linaro.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	uclinux-dist-devel@blackfin.uclinux.org,
	linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org,
	user-mode-linux-devel@lists.sourceforge.net, linux-mm@kvack.org,
	linaro-kernel@lists.linaro.org, patches@linaro.org
Subject: [PATCH v3 0/9] Fixes for common mistakes w/ for_each_process and task->mm
Date: Mon, 23 Apr 2012 00:06:41 -0700	[thread overview]
Message-ID: <20120423070641.GA27702@lizard> (raw)

Hi all,

This is another resend of several task->mm fixes, the bugs I found
during LMK code audit. Architectures were traverse the tasklist
in an unsafe manner, plus there are a few cases of unsafe access to
task->mm in general.

There were no objections on the previous resend, and the final words
were somewhere along "the patches are fine" line.

In v3:
- Dropped a controversal 'Make find_lock_task_mm() sparse-aware' patch;
- Reword arm and sh commit messages, per Oleg Nesterov's suggestions;
- Added an optimization trick in clear_tasks_mm_cpumask(): take only
  the rcu read lock, no need for the whole tasklist_lock.
  Suggested by Peter Zijlstra.

In v2: 
- introduced a small helper in cpu.c: most arches duplicate the
  same [buggy] code snippet, so it's better to fix it and move the
  logic into a common function.

Thanks,

-- 
Anton Vorontsov
Email: cbouatmailru@gmail.com

--
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             reply	other threads:[~2012-04-23  7:06 UTC|newest]

Thread overview: 85+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-23  7:06 Anton Vorontsov [this message]
2012-04-23  7:06 ` [PATCH v3 0/9] Fixes for common mistakes w/ for_each_process and task->mm Anton Vorontsov
2012-04-23  7:06 ` Anton Vorontsov
2012-04-23  7:06 ` Anton Vorontsov
2012-04-23  7:06 ` Anton Vorontsov
2012-04-23  7:07 ` [PATCH 1/9] cpu: Introduce clear_tasks_mm_cpumask() helper Anton Vorontsov
2012-04-23  7:07   ` Anton Vorontsov
2012-04-23  7:07   ` Anton Vorontsov
2012-04-23  7:07   ` Anton Vorontsov
2012-04-23  7:07   ` Anton Vorontsov
2012-04-26 23:59   ` Andrew Morton
2012-04-26 23:59     ` Andrew Morton
2012-04-26 23:59     ` Andrew Morton
2012-04-26 23:59     ` Andrew Morton
2012-04-26 23:59     ` Andrew Morton
2012-04-26 23:59     ` Andrew Morton
2012-05-01 10:45     ` Peter Zijlstra
2012-05-01 10:45       ` Peter Zijlstra
2012-05-01 10:45       ` Peter Zijlstra
2012-05-01 10:45       ` Peter Zijlstra
2012-05-01 10:45       ` Peter Zijlstra
2012-05-05  1:47       ` [PATCH] cpu: Document clear_tasks_mm_cpumask() Anton Vorontsov
2012-05-05  1:47         ` Anton Vorontsov
2012-05-05  1:47         ` Anton Vorontsov
2012-05-05  1:47         ` Anton Vorontsov
2012-05-05  1:47         ` Anton Vorontsov
2012-05-05  1:47     ` [PATCH 1/9] cpu: Introduce clear_tasks_mm_cpumask() helper Anton Vorontsov
2012-05-05  1:47       ` Anton Vorontsov
2012-05-05  1:47       ` Anton Vorontsov
2012-05-05  1:47       ` Anton Vorontsov
2012-05-05  1:47       ` Anton Vorontsov
2012-04-23  7:08 ` [PATCH 2/9] arm: Use clear_tasks_mm_cpumask() Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08 ` [PATCH 3/9] powerpc: " Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08 ` [PATCH 4/9] sh: " Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:08   ` Anton Vorontsov
2012-04-23  7:09 ` [PATCH 5/9] blackfin: A couple of task->mm handling fixes Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-06-01  4:36   ` Mike Frysinger
2012-06-01  4:36     ` Mike Frysinger
2012-06-01  4:36     ` Mike Frysinger
2012-06-01  4:36     ` Mike Frysinger
2012-04-23  7:09 ` [PATCH 6/9] blackfin: Fix possible deadlock in decode_address() Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09 ` [PATCH 7/9] um: Should hold tasklist_lock while traversing processes Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23 14:57   ` Richard Weinberger
2012-04-23 14:57     ` Richard Weinberger
2012-04-23 14:57     ` Richard Weinberger
2012-04-23 14:57     ` Richard Weinberger
2012-04-23 14:57     ` Richard Weinberger
2012-04-23 15:40     ` Anton Vorontsov
2012-04-23 15:40       ` Anton Vorontsov
2012-04-23 15:40       ` Anton Vorontsov
2012-04-23 15:40       ` Anton Vorontsov
2012-04-23 15:40       ` Anton Vorontsov
2012-04-23  7:09 ` [PATCH 8/9] um: Fix possible race on task->mm Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09 ` [PATCH 9/9] um: Properly check all process' threads for a live mm Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov
2012-04-23  7:09   ` Anton Vorontsov

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