diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 5cfc0d4..145f5ed 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -312,10 +312,10 @@
 	for (i = 0; i < numpages ; i++) {
 
 		pte = lookup_address(addr, &level);
-		if (pte)
-			current_prot = pte_pgprot(*pte);
-		else
-			pgprot_val(current_prot) = 0;
+		if (!pte)
+			return -EINVAL;
+
+		current_prot = pte_pgprot(*pte);
 
 		pgprot_val(new_prot) =
 			pgprot_val(current_prot) | pgprot_val(prot);
@@ -356,11 +356,12 @@
 	int i, ret;
 
 	for (i = 0; i < numpages; i++) {
+
 		pte = lookup_address(addr, &level);
-		if (pte)
-			current_prot = pte_pgprot(*pte);
-		else
-			pgprot_val(current_prot) = 0;
+		if (!pte)
+			return -EINVAL;
+
+		current_prot = pte_pgprot(*pte);
 
 		pgprot_val(new_prot) =
 				pgprot_val(current_prot) & ~pgprot_val(prot);