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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5812FC83F1A for ; Wed, 30 Aug 2023 18:53:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243741AbjH3Stg (ORCPT ); Wed, 30 Aug 2023 14:49:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245180AbjH3Okt (ORCPT ); Wed, 30 Aug 2023 10:40:49 -0400 Received: from gnuweeb.org (gnuweeb.org [51.81.211.47]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EEE57193; Wed, 30 Aug 2023 07:40:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gnuweeb.org; s=default; t=1693406445; bh=Sqm9WGzqpqqQN5xhJwy1ko4NvRStWPPRXC3trcKcTWs=; h=Date:To:Cc:References:From:Subject:In-Reply-To; b=qRgJN3yC0fglpLslA5ZUye7ZKns6b1Ra5JEIUommdVq4UVaO2lKtUc1k7bJezAHPM s/rJh0IhZ13MvjP3MIUwsybBeMgdeX3d6DQ8MjQbvOMejFwlLk/bEJbz9jwLkx0miR XEPZagMOcPgQVdVESLea3yOp8LAJk7ND9r6dJiVunzOG511D1X4Ho6UpZzNj3N0Ydx TJBCtz1if77C05+267Od7MvqHufkhFNfaHmSBPXf0VGO735dCVATn4qN+HcUV1UdUD cT4t867tbcFxKHyH80MtmNwFxThJHEaG0Fyu/2hZ1bQfBah1OKg/KGq78iBtxiDWay R//vJfyn5ZNag== Received: from [10.20.0.2] (unknown [182.253.126.208]) by gnuweeb.org (Postfix) with ESMTPSA id 40FAE24B336; Wed, 30 Aug 2023 21:40:41 +0700 (WIB) Message-ID: <6f93ea82-f157-e921-2028-5b4fae4ad341@gnuweeb.org> Date: Wed, 30 Aug 2023 21:40:37 +0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 To: David Laight , Zhangjin Wu , Willy Tarreau Cc: Arnd Bergmann , =?UTF-8?Q?Thomas_Wei=c3=9fschuh?= , Yuan Tan , Linux Kernel Mailing List , Linux Kselftest Mailing List References: <20230827083225.7534-1-falcon@tinylab.org> <4bbdea1710464fa2943663a25bf370c9@AcuMS.aculab.com> Content-Language: en-US From: Ammar Faizi Subject: Re: RE: [RFC] tools/nolibc: replace duplicated -ENOSYS return with single -ENOSYS return In-Reply-To: <4bbdea1710464fa2943663a25bf370c9@AcuMS.aculab.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/28/23 4:51 AM, David Laight wrote: > I just found a(nother) clang bug: > int f(void) { return "a"[2]; } > compiles to just a 'return'. I don't think that's a bug. It's undefined behavior due to an out-of-bound read. What do you expect it to return? -- Ammar Faizi