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From: David Howells <dhowells@redhat.com>
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To: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: dhowells@redhat.com, Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
        James Morris <jmorris@namei.org>, keyrings <keyrings@linux-nfs.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        linux-security-module <linux-security-module@vger.kernel.org>,
        Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH 2/6] KEYS: Reinstate EPERM for a key type name beginning with a '.'
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Date: Thu, 11 Sep 2014 22:26:52 +0100
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Mimi Zohar <zohar@linux.vnet.ibm.com> wrote:

> The concept of dot prefixing should probably be documented either in the
> code and/or documentation.  At this point, both types and keyring names
> are reserved.

Indeed.  There is one type whose name begins with a '.' that's sort of
internal to the kernel (".request_key_auth") that I definitely don't want
userspace to try creating.

The question of whether the description of a non-keyring key is permitted to
begin with a '.' is a separate issue to this patch.  We'd have to be sure that
no one is using keys of such a form.

David