KVM_GET_SUPPORTED_CPUID should only enumerate features that KVM
actually supports. The following ranges of CPUID.80000008H are reserved
and should be masked off:
EDX[31:18]
EDX[11:8]
Fixes: 24c82e576b78 ("KVM: Sanitize cpuid")
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
---
arch/x86/kvm/cpuid.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 90f9c295825d..15318f3f415e 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -1156,6 +1156,7 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function)
entry->eax = g_phys_as | (virt_as << 8);
entry->edx = 0;
+ entry->ecx &= ~(GENMASK(31, 18) | GENMASK(11, 8));
cpuid_entry_override(entry, CPUID_8000_0008_EBX);
break;
}
--
2.38.0.rc1.362.ged0d419d3c-goog
