diff --git a/fs/namespace.c b/fs/namespace.c
index a677b59efd74..c373c769e0ce 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2746,7 +2746,7 @@ void *copy_mount_options(const void __user * data)
 
 char *copy_mount_string(const void __user *data)
 {
-	return data ? strndup_user(data, PAGE_SIZE) : NULL;
+	return data ? strndup_user(data, PATH_MAX) : NULL;
 }
 
 /*