1 files changed, 12 insertions, 5 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 6bad4c4064e..d209f745db7 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1701,12 +1701,13 @@ static int do_swap_page(struct mm_struct * mm,
         spin_lock(&mm->page_table_lock);
         page_table = pte_offset_map(pmd, address);
         if (unlikely(!pte_same(*page_table, orig_pte))) {
-                pte_unmap(page_table);
-                spin_unlock(&mm->page_table_lock);
-                unlock_page(page);
-                page_cache_release(page);
                 ret = VM_FAULT_MINOR;
-                goto out;
+                goto out_nomap;
+        }
+
+        if (unlikely(!PageUptodate(page))) {
+                ret = VM_FAULT_SIGBUS;
+                goto out_nomap;
         }
 
         /* The page isn't present yet, go ahead with the fault. */
@@ -1741,6 +1742,12 @@ static int do_swap_page(struct mm_struct * mm,
         spin_unlock(&mm->page_table_lock);
 out:
         return ret;
+out_nomap:
+        pte_unmap(page_table);
+        spin_unlock(&mm->page_table_lock);
+        unlock_page(page);
+        page_cache_release(page);
+        goto out;
 }
 
 /*