Re: [PATCH] x86/entry/64: randomize kernel stack offset upon syscall

[Linus Torvalds]

On Fri, May 3, 2019 at 9:40 AM David Laight <David.Laight@xxxxxxxxxx> wrote:
>
> That gives you 10 system calls per rdrand instruction
> and mostly takes the latency out of line.

Do we really want to do this? What is the attack scenario?

With no VLA's, and the stackleak plugin, what's the upside? Are we
adding random code (literally) "just because"?

                   Linus