linux-kernel - Re: fanotify - overall design before I start sending patches

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Date:	Wed, 29 Jul 2009 16:12:09 -0400
From:	Eric Paris <eparis@...hat.com>
To:	Andreas Dilger <adilger@....com>
Cc:	Jamie Lokier <jamie@...reable.org>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, malware-list@...sg.printk.net,
	Valdis.Kletnieks@...edu, greg@...ah.com, jcm@...hat.com,
	douglas.leeder@...hos.com, tytso@....edu, arjan@...radead.org,
	david@...g.hm, jengelh@...ozas.de, aviro@...hat.com,
	mrkafk@...il.com, alexl@...hat.com, jack@...e.cz,
	tvrtko.ursulin@...hos.com, a.p.zijlstra@...llo.nl,
	hch@...radead.org, alan@...rguk.ukuu.org.uk, mmorley@....in,
	pavel@...e.cz
Subject: Re: fanotify - overall design before I start sending patches

On Mon, 2009-07-27 at 12:33 -0600, Andreas Dilger wrote:
> On Jul 25, 2009  01:29 +0100, Jamie Lokier wrote:

> It might also make sense to verify that the process doing the open has
> at least permission to open the file in question (i.e. root) so that
> some unauthorized process cannot just get file handles to arbitrary files.

All current permissions between the listener process and the object are
done.  It's quite possible to get fanotify events where the fd = -EPERM.

-Eric

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