linux-kernel - Re: [PATCH] mce: fix RCU lockdep from mce

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: <20101106185350.GA23824@basil.fritz.box>
Date:	Sat, 6 Nov 2010 19:53:50 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Davidlohr Bueso <dave@....org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mce: fix RCU lockdep from mce_log()

On Fri, Nov 05, 2010 at 06:44:59PM -0300, Davidlohr Bueso wrote:
> Hi,
> 
> Please review this patch, I am not very familiar with MCE/RCU so I'm not sure that this is the correct fix (otherwise consider it a bug report :)).
> This does "fix" the message though and I can use MCE normally.

The patch is certainly not correct. The variable needs to be read
independently of the mutex.

-Andi
--
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/