[PATCH 7/9] um: Should hold tasklist_lock while traversing processes

[PATCH v3 0/9] Fixes for common mistakes w/ for_each_process and task->mm · Anton Vorontsov <hidden> · 2012-04-23
[PATCH 1/9] cpu: Introduce clear_tasks_mm_cpumask() helper · Anton Vorontsov <hidden> · 2012-04-23
Re: [PATCH 1/9] cpu: Introduce clear_tasks_mm_cpumask() helper · Andrew Morton <akpm@linux-foundation.org> · 2012-04-26
Re: [PATCH 1/9] cpu: Introduce clear_tasks_mm_cpumask() helper · Peter Zijlstra <hidden> · 2012-05-01
[PATCH] cpu: Document clear_tasks_mm_cpumask() · Anton Vorontsov <hidden> · 2012-05-05
Re: [PATCH 1/9] cpu: Introduce clear_tasks_mm_cpumask() helper · Anton Vorontsov <hidden> · 2012-05-05
[PATCH 2/9] arm: Use clear_tasks_mm_cpumask() · Anton Vorontsov <hidden> · 2012-04-23
[PATCH 3/9] powerpc: Use clear_tasks_mm_cpumask() · Anton Vorontsov <hidden> · 2012-04-23
[PATCH 4/9] sh: Use clear_tasks_mm_cpumask() · Anton Vorontsov <hidden> · 2012-04-23
[PATCH 5/9] blackfin: A couple of task->mm handling fixes · Anton Vorontsov <hidden> · 2012-04-23
Re: [PATCH 5/9] blackfin: A couple of task->mm handling fixes · Mike Frysinger <hidden> · 2012-06-01
[PATCH 6/9] blackfin: Fix possible deadlock in decode_address() · Anton Vorontsov <hidden> · 2012-04-23
[PATCH 7/9] um: Should hold tasklist_lock while traversing processes · Anton Vorontsov <hidden> · 2012-04-23
Re: [PATCH 7/9] um: Should hold tasklist_lock while traversing processes · Richard Weinberger <richard@nod.at> · 2012-04-23
Re: [PATCH 7/9] um: Should hold tasklist_lock while traversing processes · Anton Vorontsov <hidden> · 2012-04-23
[PATCH 8/9] um: Fix possible race on task->mm · Anton Vorontsov <hidden> · 2012-04-23
[PATCH 9/9] um: Properly check all process' threads for a live mm · Anton Vorontsov <hidden> · 2012-04-23

From: richard@nod.at (Richard Weinberger)
Date: 2012-04-23 14:58:21
Also in: linux-mm, linux-sh, linux-um, linuxppc-dev, lkml

On 23.04.2012 09:09, Anton Vorontsov wrote:

Traversing the tasks requires holding tasklist_lock, otherwise it
is unsafe.

p.s. However, I'm not sure that calling os_kill_ptraced_process()
in the atomic context is correct. It seem to work, but please
take a closer look.

Signed-off-by: Anton Vorontsov<redacted>
---

You forgot my Ack and I've already explained why 
os_kill_ptraced_process() is fine.

Thanks,
//richard

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