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-rw-r--r--fs/userfaultfd.c5
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;