According to volume 3 of the APM, appendix E, CPUID
Fn8000_001A_E[D,C,B]X are reserved. Since we have no way of knowing
what these fields will be used for, they should not be whitelisted.
Fixes: 24c82e576b78 ("KVM: Sanitize cpuid")
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
Reviewed-by: Peter Shier <pshier@xxxxxxxxxx>
Reviewed-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
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 bbffa6c54697..183f40cd3362 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -696,6 +696,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
entry->ecx = entry->edx = 0;
break;
case 0x8000001a:
+ entry->ebx = entry->ecx = entry->edx = 0;
break;
case 0x8000001d:
break;
--
2.20.1.791.gb4d0f1c61a-goog
