diff --git a/fs/namespace.c b/fs/namespace.c
index ee73ca3c819737c03453e5f88bd824426cff4543..629336c91243bbf8bb8334cb2a59dd822609892f 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2700,7 +2700,7 @@ 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;
 }
 
 /*