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, 15 Jun 2010 14:40:54 -0400
From:	Davidlohr Bueso <dave.bueso@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	axboe@...nel.dk, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uniform cdrom: fix mutex unlocking in
 /proc/sys/dev/cdrom/info file

On Mon, 2010-06-14 at 12:34 -0700, Andrew Morton wrote:
> On Wed, 09 Jun 2010 12:56:50 -0400
> Davidlohr Bueso <dave.bueso@...il.com> wrote:
> 
> > If the last if condition passes the cdrom_mutex mutex will not be unlocked. 
> > This patch fixes this and also removes the unnecessary doit label that was only invoked by the done label.
> > 
> 
> Confused.  There is no way in which cdrom_sysctl_info() can forget to
> unlock cdrom_mutex.
> 

Ok, I had misread the code then, one of the reasons I don't like goto
labels, but that's a different story.

Regarding cdrom_sysctl_info(), I have noticed in several netbooks
(haven't
looked in other machines with no cdrom drive) that the
/proc/sys/dev/cdrom/info file shows no values for the listed entries,
ie:

CD-ROM information, Id: cdrom.c 3.20 2003/12/17

drive name:
drive speed:
drive # of slots:
Can close tray:
Can open tray:
...

Now, is this expected behavior? If not, should it be changed to
something
more descriptive? Perhaps it would affect user space applications that
read
the file?

Thanks,
Davidlohr

--
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/

Powered by blists - more mailing lists