diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 5573a97f1520..ceeee4bb6150 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -313,7 +313,8 @@ static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
 				    int write)
 {
 	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
-	unsigned long npages, npinned, size;
+	unsigned long npages, size;
+	int npinned;
 	unsigned long locked, lock_limit;
 	struct page **pages;
 	unsigned long first, last;
@@ -333,6 +334,9 @@ static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
 		return NULL;
 	}
 
+	if (WARN_ON_ONCE(npages > INT_MAX))
+		return NULL;
+
 	/* Avoid using vmalloc for smaller buffers. */
 	size = npages * sizeof(struct page *);
 	if (size > PAGE_SIZE)