From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.7 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 45BBE7D90D for ; Mon, 18 Nov 2019 16:23:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726461AbfKRQXD (ORCPT ); Mon, 18 Nov 2019 11:23:03 -0500 Received: from relay.sw.ru ([185.231.240.75]:57562 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726322AbfKRQXD (ORCPT ); Mon, 18 Nov 2019 11:23:03 -0500 Received: from dhcp-172-16-25-5.sw.ru ([172.16.25.5]) by relay.sw.ru with esmtp (Exim 4.92.3) (envelope-from ) id 1iWjnP-0006u4-8v; Mon, 18 Nov 2019 19:22:35 +0300 Subject: Re: [PATCH v4 1/3] kasan: No KASAN's memmove check if archs don't have it. To: Nick Hu , glider@google.com, dvyukov@google.com, corbet@lwn.net, paul.walmsley@sifive.com, palmer@sifive.com, aou@eecs.berkeley.edu, tglx@linutronix.de, gregkh@linuxfoundation.org, alankao@andestech.com, Anup.Patel@wdc.com, atish.patra@wdc.com, kasan-dev@googlegroups.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-mm@kvack.org, green.hu@gmail.com References: <20191028024101.26655-1-nickhu@andestech.com> <20191028024101.26655-2-nickhu@andestech.com> From: Andrey Ryabinin Message-ID: <73f11f1e-6df7-c217-e05d-049d04717600@virtuozzo.com> Date: Mon, 18 Nov 2019 19:22:23 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <20191028024101.26655-2-nickhu@andestech.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On 10/28/19 5:40 AM, Nick Hu wrote: > If archs don't have memmove then the C implementation from lib/string.c is used, > and then it's instrumented by compiler. So there is no need to add KASAN's > memmove to manual checks. > > Signed-off-by: Nick Hu > --- Acked-by: Andrey Ryabinin