linux-kernel - Re: Avoid speculative indirect calls in kernel

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Message-ID: <20180107140138.08a7e8e3@alans-desktop>
Date:   Sun, 7 Jan 2018 14:01:38 +0000
From:   Alan Cox <gnomes@...rguk.ukuu.org.uk>
To:     Kiernan Hager <kah.listaddress@...il.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Avoid speculative indirect calls in kernel

> I disagree. When there are patches that slow execution down up to 30%,
> I want to be able to mark a binary as "trusted" so that I can run it

It's not a binary that is trusted - it's a binary in a given use case.
You could easily have the same binary being run in two situations on the
same box at the same time and run just one of them 'trusted'.