linux-kernel - Re: [PATCH v3][RESEND] Check for immutable/append flag in fallocate path

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Date:	Wed, 09 Mar 2011 20:42:25 +0100
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	viro@...iv.linux.org.uk
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [PATCH v3][RESEND] Check for immutable/append flag in fallocate
 path

Il 05/03/2011 11:10, Marco Stornelli ha scritto:
> From: Marco Stornelli <marco.stornelli@...il.com>
> 
> In the fallocate path the kernel doesn't check for the immutable/append
> flag. 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. In addition, we don't allow to do any
> unreserve operation on an append only file but only the reserve one.
> 
> Signed-off-by: Marco Stornelli <marco.stornelli@...il.com>

Al, can you apply this patch please? I add Greg in cc, because maybe he
could be interested about stable tree.

Marco
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