1 files changed, 4 insertions, 1 deletions

diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index 743eaa646898..a9d0ddc12ace 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -294,10 +294,13 @@ static inline bool userfaultfd_must_wait(struct userfaultfd_ctx *ctx,
          * pmd_trans_unstable) of the pmd.
          */
         _pmd = READ_ONCE(*pmd);
-        if (!pmd_present(_pmd))
+        if (pmd_none(_pmd))
                 goto out;
 
         ret = false;
+        if (!pmd_present(_pmd))
+                goto out;
+
         if (pmd_trans_huge(_pmd))
                 goto out;