linux-kernel - [PATCH 0/1] freezer: fix wait_event_freezable/__thaw

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, 7 Sep 2011 20:21:56 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Tejun Heo <tj@...nel.org>, "Rafael J. Wysocki" <rjw@...k.pl>
Cc:	matthltc@...ibm.com, paul@...lmenage.org,
	containers@...ts.linux-foundation.org,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/1] freezer: fix wait_event_freezable/__thaw_task races

Hi,

On 09/07, Tejun Heo wrote:
> >
> > I meant, unless the caller plays with allow_signal(), it has all rights to do
> >
> > 	if (wait_event_freezable(...))
> > 		BUG();
> >
> > This becomes correct with the code above.
>
> Yeap, sure, w/ freezable_with_signal gone, the above should work fine.
> Care to create a patch?

Sure.

But. Tejun, Rafael, I have to rely on your review. I have no idea how
can I test this change. Hopfully it is simple enough, though.

And. wait_event_freezable_timeout() obviously has another problem,
although I hope this is fine. The caller can spend a lot of time in
refrigerator, shouldn't we update "timeout" in this case? I hope we
shouldn't.

Oleg.

--
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/