From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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=-0.8 required=3.0 tests=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 C6E47C10F25 for ; Mon, 9 Mar 2020 22:31:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AE6AD24673 for ; Mon, 9 Mar 2020 22:31:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726838AbgCIWbv (ORCPT ); Mon, 9 Mar 2020 18:31:51 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:32870 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726536AbgCIWbv (ORCPT ); Mon, 9 Mar 2020 18:31:51 -0400 Received: from viro by ZenIV.linux.org.uk with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jBQw5-008SiW-0w; Mon, 09 Mar 2020 22:31:45 +0000 Date: Mon, 9 Mar 2020 22:31:45 +0000 From: Al Viro To: Joe Perches Cc: Daniel Xu , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com Subject: Re: [PATCH] xattr: NULL initialize name in simple_xattr_alloc Message-ID: <20200309223145.GI23230@ZenIV.linux.org.uk> References: <20200309183719.3451-1-dxu@dxuuu.xyz> <19abedb11fae1b96aa052090e7a0d5bbea416824.camel@perches.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <19abedb11fae1b96aa052090e7a0d5bbea416824.camel@perches.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Mon, Mar 09, 2020 at 12:30:07PM -0700, Joe Perches wrote: > On Mon, 2020-03-09 at 11:37 -0700, Daniel Xu wrote: > > It's preferable to initialize structs to a deterministic state. > > Thanks Daniel. Not much point, TBH - there are only two callers, both assigning that field very shortly. If you want to do it, do it right - make that simple_xattr_alloc(name, value, len) with kfree(name) done on failure. And make the callers allocate the name first. Simpler cleanup rules on failure exits that way...