[Cluster-devel] [PATCH] Check for immutable flag in fallocate path
Christoph Hellwig
hch at infradead.org
Mon Feb 21 12:46:35 UTC 2011
On Mon, Feb 21, 2011 at 09:26:32AM +0100, Marco Stornelli wrote:
> From: Marco Stornelli <marco.stornelli at 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.
More information about the Cluster-devel
mailing list