linux-kernel - Re: [PATCH] tty: tty_mutex: fix lockdep warning in tty_lock

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:	Fri, 25 May 2012 15:01:41 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Alan Cox <alan@...ux.intel.com>, Ming Lei <ming.lei@...onical.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] tty: tty_mutex: fix lockdep warning in
 tty_lock_pair(v1)

On Fri, 25 May 2012 15:52:02 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> On Fri, 2012-05-25 at 14:47 +0100, Alan Cox wrote:
> > > Having looked at the source I still don't see how it could possibly
> > > work,.. So the problem with tty_release() -> tty_ldisc_release() is
> > > that tty_ldisc_release() does an unlock/lock of tty.
> > 
> > Yes it should do the pair, see the patch I posted restructing it, and
> > the second one restructing it right.
> 
> http://marc.info/?l=linux-kernel&m=133794355529930
> 
> That one? To what tree does one apply that? Because the tty_lock_pair()
> in Linus is still missing a lockdep annotation afaict.

It applies on top of the other patches being tested in the thread on the
lockdep warning.

Alan
--
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/