Re: [PATCH v2 03/13] KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks

From: Jim Mattson
Date: Mon Jan 06 2020 - 15:17:14 EST

On Wed, Dec 11, 2019 at 12:48 PM Marios Pomonis <pomonis@xxxxxxxxxx> wrote:
> This fixes a Spectre-v1/L1TF vulnerability in picdev_write().
> It replaces index computations based on the (attacked-controlled) port
> number with constants through a minor refactoring.
> Fixes: commit 85f455f7ddbe ("KVM: Add support for in-kernel PIC emulation")
> Signed-off-by: Nick Finco <nifi@xxxxxxxxxx>
> Signed-off-by: Marios Pomonis <pomonis@xxxxxxxxxx>
> Reviewed-by: Andrew Honig <ahonig@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx

Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>