From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
X-Spam-Level: 
X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00,
	HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS
	autolearn=no autolearn_force=no version=3.4.0
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 75C0CC4320A
	for <linux-kernel@archiver.kernel.org>; Wed,  1 Sep 2021 15:35:27 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by mail.kernel.org (Postfix) with ESMTP id 58E4461057
	for <linux-kernel@archiver.kernel.org>; Wed,  1 Sep 2021 15:35:27 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1343778AbhIAPgX (ORCPT
        <rfc822;linux-kernel@archiver.kernel.org>);
        Wed, 1 Sep 2021 11:36:23 -0400
Received: from zeniv-ca.linux.org.uk ([142.44.231.140]:39530 "EHLO
        zeniv-ca.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S244351AbhIAPgV (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Wed, 1 Sep 2021 11:36:21 -0400
Received: from viro by zeniv-ca.linux.org.uk with local (Exim 4.94.2 #2 (Red Hat Linux))
        id 1mLSCW-000H5h-E1; Wed, 01 Sep 2021 15:30:56 +0000
Date:   Wed, 1 Sep 2021 15:30:56 +0000
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Dmitry Kadashev <dkadashev@gmail.com>
Cc:     Jens Axboe <axboe@kernel.dk>,
        Christoph Hellwig <hch@infradead.org>,
        Stephen Brennan <stephen.s.brennan@oracle.com>,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] namei: get rid of unused filename_parentat()
Message-ID: <YS+csMTV2tTXKg3s@zeniv-ca.linux.org.uk>
References: <20210901150040.3875227-1-dkadashev@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20210901150040.3875227-1-dkadashev@gmail.com>
Sender: Al Viro <viro@ftp.linux.org.uk>
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Wed, Sep 01, 2021 at 10:00:40PM +0700, Dmitry Kadashev wrote:
> After the switch of kern_path_locked() to __filename_parentat() (to
> address use after free bug) nothing is using filename_parentat(). Also,
> filename_parentat() is inherently buggy: the "last" output arg
> always point to freed memory.
> 
> Drop filename_parentat() and rename __filename_parentat() to
> filename_parentat().

I'd rather fold that into previous patch.

And it might be better to fold filename_create() into its 2 callers
and rename __filename_create() as well.

Let me poke around a bit...