linux-kernel - Re: kernfs/rtc: circular dependency between kernfs and ops

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]

Message-ID: <20140331124351.43033c93@linux.lan.towertech.it>
Date:	Mon, 31 Mar 2014 12:43:51 +0200
From:	Alessandro Zummo <a.zummo@...ertech.it>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Sasha Levin <sasha.levin@...cle.com>, Tejun Heo <tj@...nel.org>,
	Greg KH <greg@...ah.com>, rtc-linux@...glegroups.com,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: kernfs/rtc: circular dependency between kernfs and ops_lock

On Mon, 31 Mar 2014 11:52:36 +0200
Lars-Peter Clausen <lars@...afoo.de> wrote:

> It's the same bug, device_unregister(&rtc->dev) will try to unregister all 
> sysfs files attached to the device and that function is still called with 
> the rtc mutex held.

 rtc-cmos tries to unregister the rtc device in the probe function,
 which should not be done. 

 the last patches fixes it. I'll keep trying to trigger the bug on my systems.

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

--
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/