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

To:	Linux Kernel <linux-kernel@xxxxxxxxxxxxxxx>
Subject:	Re: [PATCH] Check for immutable flag in fallocate path
From:	Marco Stornelli <marco.stornelli@xxxxxxxxx>
Date:	Sat, 26 Feb 2011 15:59:27 +0100
Cc:	linux-ext4@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, cluster-devel@xxxxxxxxxx, xfs@xxxxxxxxxxx, Linux FS Devel <linux-fsdevel@xxxxxxxxxxxxxxx>
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Il 21/02/2011 09:26, Marco Stornelli ha scritto:
> From: Marco Stornelli <marco.stornelli@xxxxxxxxx>
> 
> 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@xxxxxxxxx>

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