linux-kernel - Re: [BUG?]Set XIP mount option on ext2 bypass check.

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Message-Id: <200706220122.41586.arnd@arndb.de>
Date:	Fri, 22 Jun 2007 01:22:41 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Carsten Otte <cotte@...ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Yan Zheng <yanzheng@...n.com>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [BUG?]Set XIP mount option on ext2 bypass check.

On Thursday 21 June 2007, Carsten Otte wrote:
> 
> This is an updated version of my bugfix patch. Yan Zheng pointed out,
> that ext2_remount lacks checking if -o xip should be enabled or not.
> This patch checks for presence of direct_access on the backing block
> device and if the blocksize meets the requirements.
> Andrew, please consider adding this patch to -mm.
> 
> Signed-off-by: Carsten Otte <cotte@...ibm.com>

It looks to me like a local denial of service attack in case of
user-mountable ext2 file systems in /etc/fstab.

Shouldn't that make it go into 2.6.22?

	Arnd <><
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