linux-kernel - Re: [PATCH] random: mix all saved registers into entropy pool

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Message-ID: <20140521193905.GN1873@two.firstfloor.org>
Date:	Wed, 21 May 2014 21:39:05 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jörn Engel <joern@...fs.org>
Cc:	Andi Kleen <andi@...stfloor.org>, Theodore Ts'o <tytso@....edu>,
	"H. Peter Anvin" <hpa@...or.com>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] random: mix all saved registers into entropy pool

> 
> 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
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