linux-kernel - Re: Should we use preempt_disable() in sleep_on

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:	Wed, 2 Dec 2009 23:12:44 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	liu pf <kernelfans@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: Should we use preempt_disable() in sleep_on_common()?

On Wed, Dec 02, 2009 at 11:07:46PM -0800, Arjan van de Ven wrote:
> On Thu, 3 Dec 2009 14:49:14 +0800
> liu pf <kernelfans@...il.com> wrote:
> 
> > Hi:
> > 
> > I am puzzled with the following scenario. Could anyone enlighten me?
> 
> 
> sleep_on family of APIs is very racy and just cannot be used correctly;
> I'm not surprised that there's a preempt race in it, but trust me, it's
> not the biggest race... never ever use these APIs!!!
> 
> 

BTW, why do we still have them? I checked couple and they don't seem to
be used...

-- 
Dmitry
--
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/