1 files changed, 5 insertions, 1 deletions

diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c
index a23001a22c15..c4c9def8ffea 100644
--- a/mm/page_vma_mapped.c
+++ b/mm/page_vma_mapped.c
@@ -104,6 +104,7 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *pvmw)
         struct mm_struct *mm = pvmw->vma->vm_mm;
         struct page *page = pvmw->page;
         pgd_t *pgd;
+        p4d_t *p4d;
         pud_t *pud;
 
         /* The only possible pmd mapping has been handled on last iteration */
@@ -133,7 +134,10 @@ restart:
         pgd = pgd_offset(mm, pvmw->address);
         if (!pgd_present(*pgd))
                 return false;
-        pud = pud_offset(pgd, pvmw->address);
+        p4d = p4d_offset(pgd, pvmw->address);
+        if (!p4d_present(*p4d))
+                return false;
+        pud = pud_offset(p4d, pvmw->address);
         if (!pud_present(*pud))
                 return false;
         pvmw->pmd = pmd_offset(pud, pvmw->address);