Re: [PATCH v2 12/13] KVM: x86: Protect DR-based index computations from Spectre-v1/L1TF attacks

On Wed, Dec 11, 2019 at 12:49 PM Marios Pomonis pomonis@google.com wrote:

This fixes a Spectre-v1/L1TF vulnerability in __kvm_set_dr() and kvm_get_dr(). Both kvm_get_dr() and kvm_set_dr() (a wrapper of __kvm_set_dr()) are exported symbols so KVM should tream them conservatively from a security perspective.

Fixes: commit 020df0794f57 ("KVM: move DR register access handling into generic code")

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