KVM: Fix bogus sign extension in mmu mapping audit

When auditing a 32-bit guest on a 64-bit host, sign extension of the page
table directory pointer table index caused bogus addresses to be shown on
audit errors.

Fix by declaring the index unsigned.

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index cab26f3..2d90577 100644 (file)
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -1360,7 +1360,7 @@ static void audit_mappings_page(struct kvm_vcpu *vcpu, u64 page_pte,
 
 static void audit_mappings(struct kvm_vcpu *vcpu)
 {
-       int i;
+       unsigned i;
 
        if (vcpu->mmu.root_level == 4)
                audit_mappings_page(vcpu, vcpu->mmu.root_hpa, 0, 4);