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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20141201112957.GC5048@mwanda>
Date:	Mon, 1 Dec 2014 14:29:57 +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 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.

Otherwise there are thousands of calls to memset() which we would need
to audit.  We could do some of this automatically but it's going to be a
mess.

regards,
dan carpenter
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/