Re: [PATCH v2 06/13] KVM: x86: Protect kvm_lapic_reg_write() from Spectre-v1/L1TF attacks

On Wed, Dec 11, 2019 at 12:48 PM Marios Pomonis pomonis@google.com wrote:

This fixes a Spectre-v1/L1TF vulnerability in kvm_lapic_reg_write(). This function contains index computations based on the (attacker-controlled) MSR number.

Fixes: commit 0105d1a52640 ("KVM: x2apic interface to lapic")

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