From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 97487138010 for ; Fri, 2 Nov 2012 16:11:28 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id EA80321C05C; Fri, 2 Nov 2012 16:10:59 +0000 (UTC) Received: from out5-smtp.messagingengine.com (out5-smtp.messagingengine.com [66.111.4.29]) by pigeon.gentoo.org (Postfix) with ESMTP id 4D6EC21C002 for ; Fri, 2 Nov 2012 16:08:33 +0000 (UTC) Received: from compute6.internal (compute6.nyi.mail.srv.osa [10.202.2.46]) by gateway1.nyi.mail.srv.osa (Postfix) with ESMTP id C9BFF20690 for ; Fri, 2 Nov 2012 12:08:32 -0400 (EDT) Received: from frontend1.nyi.mail.srv.osa ([10.202.2.160]) by compute6.internal (MEProxy); Fri, 02 Nov 2012 12:08:32 -0400 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=fastmail.co.uk; h= message-id:date:from:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; s=mesmtp; bh=nbPQcmTu03l7KKa0chpCAg1nzlI=; b=EA0CnTF4ITbedW/XrbM7zz3kaK3W TBa7n24QvaDhar55kTSoKXSjtPycUmLGcajhY/R6m2+Dn/UwUhpB7MZ5Vyaw5cHf /WldZKuwU1ele8RyTpvAFYa9LHAuOWcSwJcff3MsnblHQRRWgczTiEu6Pe7hY63e TDdfJQDjZh8WCUg= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d= messagingengine.com; h=message-id:date:from:mime-version:to :subject:references:in-reply-to:content-type :content-transfer-encoding; s=smtpout; bh=nbPQcmTu03l7KKa0chpCAg 1nzlI=; b=U86MSEsWezvzX+6Y2HCFp9AW/9nCpKRSDjn8aWcvRuciM+GJLiD4Sv lO83vwrMpdQU1sxDrLa5mxn+9c6smx4eQeYGQf553MkO3r188leOXR3iuHSBZy4q 2j2yE7UAM88kbq8PVlup1mmlLHdIIZNf+CItilcW8iz8Xo+OL5wEo= X-Sasl-enc: AQLOL+Rn9SIdM2uFLa7jfTT6lgnkFX5HlygTZlGmgSrQ 1351872512 Received: from [10.7.117.114] (unknown [90.152.1.242]) by mail.messagingengine.com (Postfix) with ESMTPA id 71DA98E04BE for ; Fri, 2 Nov 2012 12:08:32 -0400 (EDT) Message-ID: <5093EFF7.70407@fastmail.co.uk> Date: Fri, 02 Nov 2012 16:08:23 +0000 From: Kerin Millar User-Agent: Postbox 3.0.5 (Windows/20120826) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Heads-up: Several kernel versions have severe EXT4 data corruption bug References: <1351506571.3134.1@numa-i> <5093CE6E.2090707@fastmail.co.uk> <5093DEEE.6050909@gmail.com> In-Reply-To: <5093DEEE.6050909@gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Archives-Salt: ffa638f1-26ab-42bc-a2e0-a52f85a92c0d X-Archives-Hash: 6df4f4d79b37b34f4f74e1287c0d53c0 Dale wrote: > Kerin Millar wrote: >> Helmut Jarausch wrote: >>> On 10/24/2012 03:54:39 PM, Nikos Chantziaras wrote: >>>> Kernels 3.4, 3.5, and 3.6 can result in severe data corruption if >>>> you're using the EXT4 filesystem: >>> It looks as if Eric Sandeen has found the culprit and Theodore Ts'o has >>> suggested this patch yesterday >>> https://lkml.org/lkml/2012/10/28/309 >>> >>> Helmut. >>> >> Here's the final patch: >> >> https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ffb5387 >> >> >> It turns out to have had nothing to do with nobarrier. >> >> --Kerin >> >> > > > Could you explain a little on who it could have affected? Is it more > serious or less serious than originally thought? This is for those of > us who don't subscribe to the kernel mailing list, which I have read is > hugely active. I would describe the bug itself as serious but it will affect few users because journal_checksum isn't enabled by default. Ted submitted a patch to enable the option by default back in 2009 but it was reverted a few months later by Linus due to this bug: https://bugzilla.kernel.org/show_bug.cgi?id=14354 I'm pretty sure that it hasn't since been re-enabled as a default. As long as you haven't enabled this option, you shouldn't have anything to worry about. --Kerin