linux-ext4 - Re: [PATCH] Check for immutable flag in fallocate path

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Message-ID: <4D69154F.8090000@gmail.com>
Date:	Sat, 26 Feb 2011 15:59:27 +0100
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
CC:	linux-ext4@...r.kernel.org, linux-btrfs@...r.kernel.org,
	cluster-devel@...hat.com, xfs@....sgi.com,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH] Check for immutable flag in fallocate path

Il 21/02/2011 09:26, Marco Stornelli ha scritto:
> From: Marco Stornelli <marco.stornelli@...il.com>
> 
> All fs must check for the immutable flag in their fallocate callback.
> It's possible to have a race condition in this scenario: an application
> open a file in read/write and it does something, meanwhile root set the
> immutable flag on the file, the application at that point can call
> fallocate with success. Only Ocfs2 check for the immutable flag at the
> moment.
> 
> Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>

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