linux-kernel - Re: [PATCH for-3.20-fixes] workqueue: fix hang involving racing cancel[_delayed]_work_sync()'s for PREEMPT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 3 Mar 2015 08:52:04 +0100
From:	Jesper Nilsson <jesper.nilsson@...s.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Jesper Nilsson <jespern@...s.com>, Rabin Vincent <rabinv@...s.com>,
	Jesper Nilsson <jespern@...s.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH for-3.20-fixes] workqueue: fix hang involving racing
 cancel[_delayed]_work_sync()'s for PREEMPT_NONE

On Mon, Mar 02, 2015 at 11:21:44AM -0500, Tejun Heo wrote:
> On Mon, Mar 02, 2015 at 01:26:15PM +0100, Jesper Nilsson wrote:
> > On Mon, Feb 09, 2015 at 05:15:27PM +0100, Tejun Heo wrote:
> > > Hello,
> > 
> > Hi!
> > 
> > > This patch removes the possible hang by updating __cancel_work_timer()
> > > to explicitly wait for clearing of CANCELING rather than invoking
> > > flush_work() after try_to_grab_pending() fails with -ENOENT.  The
> > > explicit wait uses the matching bit waitqueue for the CANCELING bit.
> > > 
> > > Link: http://lkml.kernel.org/g/20150206171156.GA8942@axis.com
> > > 
> > > Signed-off-by: Tejun Heo <tj@...nel.org>
> > > Reported-by: Rabin Vincent <rabin.vincent@...s.com>
> > > Cc: stable@...r.kernel.org
> > 
> > What's the status on this patch, it's not in 4.0-rc1 at least?
> > Is it queued for the 3.18 stable branch?
> 
> Sorry about the delay.  Applied to wq/for-4.0-fixes.  Will push out in
> a week or so.

Thanks, that works great. Just wanted to know. :-)

> Thanks.
> 
> -- 
> tejun

/^JN - Jesper Nilsson
-- 
               Jesper Nilsson -- jesper.nilsson@...s.com
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/