linux-kernel - Re: [PATCH] random: add and use memzero

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Message-ID: <20141201113815.GD5048@mwanda>
Date:	Mon, 1 Dec 2014 14:38:15 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Daniel Borkmann <dborkman@...hat.com>
Cc:	tytso@....edu, zatimend@...mail.co.uk,
	linux-kernel@...r.kernel.org,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Kees Cook <keescook@...omium.org>,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] random: add and use memzero_explicit() for clearing data

On Mon, Dec 01, 2014 at 02:29:57PM +0300, Dan Carpenter wrote:
> On Mon, Dec 01, 2014 at 12:04:57PM +0100, Daniel Borkmann wrote:
> > Well, BSD has helpers such as bzero_explicit() for such cases to work
> > around this, which memzero_explicit() similarly does; see also [1].
> > 
> >   [1] https://gcc.gnu.org/ml/gcc-help/2014-10/msg00059.html
> 
> We should make memset() a define and call a custom function internally.
>

Or we could specify -fno-builtin-memset like the GCC people suggest.

regards,
dan carpenter

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