diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 96991ded82fe..c4a3558589ab 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2448,8 +2448,11 @@ static int hugetlb_cow(struct mm_struct *mm, struct vm_area_struct *vma,
 	 * When the original hugepage is shared one, it does not have
 	 * anon_vma prepared.
 	 */
-	if (unlikely(anon_vma_prepare(vma)))
+	if (unlikely(anon_vma_prepare(vma))) {
+		/* Caller expects lock to be held */
+		spin_lock(&mm->page_table_lock);
 		return VM_FAULT_OOM;
+	}
 
 	copy_user_huge_page(new_page, old_page, address, vma);
 	__SetPageUptodate(new_page);