Re: [Bug #37222] 3.0.0-rc1-git3 -- kernel/sched.c:619 invoked rcu_dereference_check() without protection!

Lin Ming
2011-06-13T02:00:06Z

> From: Rafael J. Wysocki <rjw-KKrjLPT3xs0@public.gmane.org>
> Date: Mon, Jun 13, 2011 at 4:30 AM
> Subject: [Bug #37222] 3.0.0-rc1-git3 -- kernel/sched.c:619 invoked
> rcu_dereference_check() without protection!
> To: Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
> Cc: Kernel Testers List <kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Maciej
> Rutecki <maciej.rutecki-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Florian Mickler
> <florian-sVu6HhrpSfRAfugRpC6u6w@public.gmane.org>, Miles Lane <miles.lane-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>
>
> This message has been generated automatically as a part of a summary report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.39. Please verify if it still should be listed and let the
> tracking team
> know (either way).
>
>
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=37222
> Subject : 3.0.0-rc1-git3 -- kernel/sched.c:619 invoked
> rcu_dereference_check() without protection!
> Submitter : Miles Lane <miles.lane-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Date : 2011-06-04 3:22 (9 days old)
> Message-ID : <BANLkTikHS7TuFhm3cfJ+Y=erWDaAwuE_TA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
> References : http://marc.info/?l=linux-kernel&m=130715775803343&w=2
>

This was fixed already.
http://git.kernel.org/?p=linux/kernel/git/x86/linux-2.6-tip.git;a=commit;h=6c6c54e180

commit 6c6c54e1807faf116724451ef2bd14993780470a
Author: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Date: Fri Jun 3 17:37:07 2011 +0200

sched: Fix/clarify set_task_cpu() locking rules

Thanks,
Lin Ming