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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY 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 2E469C432BE for ; Tue, 10 Aug 2021 15:02:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E972F60FC4 for ; Tue, 10 Aug 2021 15:02:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241332AbhHJPCn (ORCPT ); Tue, 10 Aug 2021 11:02:43 -0400 Received: from smtprelay0209.hostedemail.com ([216.40.44.209]:57676 "EHLO smtprelay.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S234153AbhHJPCn (ORCPT ); Tue, 10 Aug 2021 11:02:43 -0400 Received: from omf04.hostedemail.com (clb03-v110.bra.tucows.net [216.40.38.60]) by smtprelay05.hostedemail.com (Postfix) with ESMTP id 42AD51836942D; Tue, 10 Aug 2021 15:02:20 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: joe@perches.com) by omf04.hostedemail.com (Postfix) with ESMTPA id A6904D1516; Tue, 10 Aug 2021 15:02:18 +0000 (UTC) Message-ID: Subject: Re: [PATCH v3] drivers/edac/edac_mc: Remove all strcpy() uses From: Joe Perches To: Robert Richter Cc: Len Baker , Borislav Petkov , Mauro Carvalho Chehab , Tony Luck , James Morse , Kees Cook , linux-hardening@vger.kernel.org, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 10 Aug 2021 08:02:17 -0700 In-Reply-To: References: <20210807155957.10069-1-len.baker@gmx.com> <20210808112617.GA1927@titan> <99448ef29830fda9b19409bc23b0e7513b22f7b7.camel@perches.com> Content-Type: text/plain; charset="ISO-8859-1" User-Agent: Evolution 3.40.0-1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspamout04 X-Rspamd-Queue-Id: A6904D1516 X-Stat-Signature: zomo8gkouz7irgaf7tbabch1cxordum7 X-Session-Marker: 6A6F6540706572636865732E636F6D X-Session-ID: U2FsdGVkX1+Gpl2phGQ76xLkFse458J6cytt06otvuo= X-HE-Tag: 1628607738-261957 Precedence: bulk List-ID: X-Mailing-List: linux-edac@vger.kernel.org On Tue, 2021-08-10 at 16:36 +0200, Robert Richter wrote: > On 09.08.21 10:18:58, Joe Perches wrote: > > > strscpy and scnprintf have different return values and it's simpler > > and much more common to use scnprintf for appended strings that are > > limited to a specific buffer length. > > Calculating the bytes written from the return value is a oneliner. Not really. You still have to test for strscpy's possible return of -E2BIG.