diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index cadcd12..2d8c2d8 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -1643,6 +1643,8 @@ static int userfaultfd_zeropage(struct userfaultfd_ctx *ctx,
 		ret = mfill_zeropage(ctx->mm, uffdio_zeropage.range.start,
 				     uffdio_zeropage.range.len);
 		mmput(ctx->mm);
+	} else {
+		return -ENOSPC;
 	}
 	if (unlikely(put_user(ret, &user_uffdio_zeropage->zeropage)))
 		return -EFAULT;