linux-kernel - Re: [PATCH 6/6] crypto: add jitterentropy RNG

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Date:	Thu, 23 Apr 2015 16:05:08 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	herbert@...dor.apana.org.au,
	Andreas Steffen <andreas.steffen@...ongswan.org>,
	Theodore Ts'o <tytso@....edu>,
	Sandy Harris <sandyinchina@...il.com>,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/6] crypto: add jitterentropy RNG

A nit only, I'm afraid: this patch adds a license mismatch.

On Wed, 2015-04-22 at 21:25 +0200, Stephan Mueller wrote:
> --- /dev/null
> +++ b/crypto/jitterentropy.c

> + * License
> + * =======
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + *    notice, and the entire permission notice in its entirety,
> + *    including the disclaimer of warranties.
> + * 2. Redistributions in binary form must reproduce the above copyright
> + *    notice, this list of conditions and the following disclaimer in the
> + *    documentation and/or other materials provided with the distribution.
> + * 3. The name of the author may not be used to endorse or promote
> + *    products derived from this software without specific prior
> + *    written permission.
> + *
> + * ALTERNATIVELY, this product may be distributed under the terms of
> + * the GNU General Public License, in which case the provisions of the GPL2 are
> + * required INSTEAD OF the above restrictions.  (This clause is
> + * necessary due to a potential bad interaction between the GPL and
> + * the restrictions contained in a BSD-style copyright.)
> + *
> + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
> + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
> + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
> + * WHICH ARE HEREBY DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE
> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
> + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
> + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
> + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
> + * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
> + * DAMAGE.
> + */

This states the license is BSD or GPL v2.

> +MODULE_LICENSE("GPL");

And, according to inlude/linux/module.h, using
    MODULE_LICENSE("Dual BSD/GPL");

here would match that statement.


Paul Bolle

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