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Date:	Mon, 30 Jun 2014 13:40:40 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	David Drysdale <drysdale@...gle.com>
Cc:	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Meredydd Luff <meredydd@...atehouse.org>,
	Kees Cook <keescook@...omium.org>,
	James Morris <james.l.morris@...cle.com>,
	linux-api@...r.kernel.org
Subject: Re: [PATCH 01/11] fs: add O_BENEATH_ONLY flag to openat(2)

David Drysdale <drysdale@...gle.com> writes:

> Add a new O_BENEATH_ONLY flag for openat(2) which restricts the
> provided path, rejecting (with -EACCES) paths that are not beneath
> the provided dfd.  In particular, reject:
>  - paths that contain .. components
>  - paths that begin with /
>  - symlinks that have paths as above.

How about bind mounts?

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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