linux-kernel - Re: [PATCH] fb: Rework locking to fix lock ordering on takeover

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: <20130113000242.GD10630@liondog.tnic>
Date:	Sun, 13 Jan 2013 01:02:42 +0100
From:	Borislav Petkov <bp@...e.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jiri Kosina <jkosina@...e.cz>,
	Shawn Guo <shawn.guo@...aro.org>,
	Sasha Levin <levinsasha928@...il.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Josh Boyer <jwboyer@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	LKML <linux-kernel@...r.kernel.org>,
	Florian Tobias Schandinat <florianSchandinat@....de>
Subject: Re: [PATCH] fb: Rework locking to fix lock ordering on takeover

On Sat, Jan 12, 2013 at 01:13:23PM -0800, Andrew Morton wrote:
> Florian has been taking a month or two's downtime (now expired, I
> think) so I've been waiting for him to reappear to process this one for
> 3.8.
> 
> Meanwhile, I guess we could put it into mainline ;) It has been in
> -next for a month.
> 
> From: Alan Cox <alan@...ux.intel.com>
> Subject: fb: rework locking to fix lock ordering on takeover
> 
> Adjust the console layer to allow a take over call where the caller
> already holds the locks.  Make the fb layer lock in order.
> 
> This is partly a band aid, the fb layer is terminally confused about the
> locking rules it uses for its notifiers it seems.
> 
> [akpm@...ux-foundation.org: remove stray non-ascii char, tidy comment]
> [akpm@...ux-foundation.org: export do_take_over_console()]
> Signed-off-by: Alan Cox <alan@...ux.intel.com>
> Cc: Florian Tobias Schandinat <FlorianSchandinat@....de>
> Cc: Stephen Rothwell <sfr@...b.auug.org.au>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>

Yes, that's the one, modulo Andrew's fixes, which I've been running.
Irregardless, I'll run this one tomorrow just in case, because it
triggers here so easily.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--
--
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/