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Date: Wed, 21 May 2014 21:39:05 +0200
From: Andi Kleen <andi@firstfloor.org>
To: =?iso-8859-1?Q?J=F6rn?= Engel <joern@logfs.org>
Cc: Andi Kleen <andi@firstfloor.org>, "Theodore Ts'o" <tytso@mit.edu>,
        "H. Peter Anvin" <hpa@zytor.com>, lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] random: mix all saved registers into entropy pool
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> 
> I think leaking of private keys or similar information is not a
> concern.  But please prove me wrong.  Better you now than someone else
> later.

While I don't have a concrete exploit it seems seems dangerous to me. 
The LibreSSL people just removed a similar behavior from OpenSSL.

-Andi