linux-kernel - Re: [PATCH v6 1/6] KEYS: special dot prefixed keyring name bug fix

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Message-ID: <7422.1403875460@warthog.procyon.org.uk>
Date:	Fri, 27 Jun 2014 14:24:20 +0100
From:	David Howells <dhowells@...hat.com>
To:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
Cc:	dhowells@...hat.com, keyrings <keyrings@...ux-nfs.org>,
	linux-security-module <linux-security-module@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Josh Boyer <jwboyer@...hat.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Dmitry Kasatkin <dmitry.kasatkin@...il.com>
Subject: Re: [PATCH v6 1/6] KEYS: special dot prefixed keyring name bug fix

Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:

> Dot prefixed keyring names are supposed to be reserved for the
> kernel, but add_key() calls key_get_type_from_user(), which
> incorrectly verifies the 'type' field, not the 'description' field.
> This patch verifies the 'description' field isn't dot prefixed,
> when creating a new keyring, and removes the dot prefix test in
> key_get_type_from_user().
> 
> Changelog v6:
> - whitespace and other cleanup
> 
> Changelog v5:
> - Only prevent userspace from creating a dot prefixed keyring, not
>   regular keys  - Dmitry
> 
> Reported-by: Dmitry Kasatkin <d.kasatkin@...sung.com>
> Cc: David Howells <dhowells@...hat.com>
> Signed-off-by: Mimi Zohar <zohar@...ux.vnet.ibm.com>

Acked-by: David Howells <dhowells@...hat.com>
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