linux-kernel - Re: [PATCH v2] cpu: do not leak vulnerabilities to unprivileged users

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Message-ID: <20180126164310.13a29ad2@alans-desktop>
Date:   Fri, 26 Jan 2018 16:43:10 +0000
From:   Alan Cox <gnomes@...rguk.ukuu.org.uk>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH v2] cpu: do not leak vulnerabilities to unprivileged
 users

On Fri, 26 Jan 2018 13:31:58 +0100
"Jason A. Donenfeld" <Jason@...c4.com> wrote:

> While it's public information if the CPU in general has spectre/meltdown
> bugs, it probably shouldn't be as globally obvious to all unprivileged
> users 

As I replied to you last time you posted this

a) The info is already trivially accessible via /proc/cpuinfo or by
measurement to an attacker
b) Some JIT and other environments need to know

Alan