Re: [PATCH v2 08/13] KVM: x86: Protect MSR-based index computations in pmu.h from Spectre-v1/L1TF attacks

Jim Mattson
2020-01-06T20:18:45Z

On Wed, Dec 11, 2019 at 12:49 PM Marios Pomonis <pomonis@google.com> wrote:
>
> This fixes a Spectre-v1/L1TF vulnerability in the get_gp_pmc() and
> get_fixed_pmc() functions.
> They both contain index computations based on the (attacker-controlled)
> MSR number.
>
> Fixes: commit 25462f7f5295 ("KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch")
>
> Signed-off-by: Nick Finco <nifi@google.com>
> Signed-off-by: Marios Pomonis <pomonis@google.com>
> Reviewed-by: Andrew Honig <ahonig@google.com>
> Cc: stable@vger.kernel.org

Reviewed-by: Jim Mattson <jmattson@google.com>