diff options
| -rw-r--r-- | arch/x86/kvm/x86.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 5f5edb6ddc83..fb3ea7aad0c1 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1747,7 +1747,13 @@ static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) } /* variable MTRRs */ - return valid_mtrr_type(data & 0xff); + WARN_ON(!(msr >= 0x200 && msr < 0x200 + 2 * KVM_NR_VAR_MTRR)); + + if ((msr & 1) == 0) + /* MTRR base */ + return valid_mtrr_type(data & 0xff); + /* MTRR mask */ + return true; } static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |