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Go Back   Linux Archive > Redhat > Cluster Development

 
 
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Old 02-21-2011, 11:46 AM
Christoph Hellwig
 
Default Check for immutable flag in fallocate path

On Mon, Feb 21, 2011 at 09:26:32AM +0100, Marco Stornelli wrote:
> From: Marco Stornelli <marco.stornelli@gmail.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.

Please add the check in fs/open.c:do_fallocate() so that it covers all
filesystems.
 

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