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 2B48BC433EF for ; Thu, 21 Apr 2022 15:00:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1389769AbiDUPAr (ORCPT ); Thu, 21 Apr 2022 11:00:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38584 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1389759AbiDUPAo (ORCPT ); Thu, 21 Apr 2022 11:00:44 -0400 Received: from mail-qt1-x82f.google.com (mail-qt1-x82f.google.com [IPv6:2607:f8b0:4864:20::82f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AD9C443F1 for ; Thu, 21 Apr 2022 07:57:54 -0700 (PDT) Received: by mail-qt1-x82f.google.com with SMTP id d14so3407127qtw.5 for ; Thu, 21 Apr 2022 07:57:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=FfZNCizm0Kgf1lEBR0XR9Meqi5ihWzie8fY0lQAxquc=; b=l53Qzlyz/ITKu/ZFDMfzyBNJJv+J5kWUdOVNjodIZ/lJ0jABu9mD9+3IY/kc3RU+cs CtQvbjrqDW7GqA6xNvWD6eHjfjhGGoG8mqWuZ518j5IJ9q4eZldSVlezfJp6/45tJRnV 9v/w4Hbh/xbgFbBlvT9duNCVFpNxWWaCzthk/cRR3fQWVlhKj3oF0hxz6+HVD7vWEp2m cFc614cP530AbYm6vIN+25crdBydtdNN2mRa7u7A3G64sUwpDCu06eAuSazKJV3pta9W D4RsmTrwYd6sb4TC8rEpRDQxNzU3G5GLqzJyUlgbQJCsxfZEj/AupFrdeJtNKk5sryVp Swmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=FfZNCizm0Kgf1lEBR0XR9Meqi5ihWzie8fY0lQAxquc=; b=ZcCyH7DF0uHgPVzJayM/UEFSO5MxTTBdNl3/dDlCoauMH99eMuavJYgmZPquD4xUYS 02ypue4oNyJcccnHnvzA8LC1esFWVDyc09vAG/suWa/sWxYGYn+TiIR/owSMcWQuLqEj gtAPSPBlXrQPdsvuBr1kQYF/71RXLmW4DusP1bkB1ewA9NADnK4BjglQvIc0lXpRT7y/ jfYXW83ORzj+ewOwUGmPidB75cLJEq4E3wB9uCgRXhNnIS89skzNJMy64FaIz5apg954 eqHqH4WekpD8t490doIKYCZjZDsqV/pIs7Zf1Ydhm2QDnbp4x0EW0VcXmvjrcT4LsaNy 6nyw== X-Gm-Message-State: AOAM531dI+FxRAlYfuCfwRbkkyJSEINkf79vW71hrEeCWezOZusfCTdQ j/P+O57oGp5bwO4qDIuh6CJ3z8pgQwPSQQ== X-Google-Smtp-Source: ABdhPJzOJcz57QkK9Ar8/hS2OYw2gKk4ceEYG2hUEPSmcuqXnBZayTqmhBBVgFqnIpUUkz4eMglw0Q== X-Received: by 2002:a05:622a:1186:b0:2f2:68:898 with SMTP id m6-20020a05622a118600b002f200680898mr13169130qtk.389.1650553073296; Thu, 21 Apr 2022 07:57:53 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-142-162-113-129.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.162.113.129]) by smtp.gmail.com with ESMTPSA id a7-20020a05622a064700b002e238d6db02sm3825225qtb.54.2022.04.21.07.57.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Apr 2022 07:57:52 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1nhYFk-007DbO-7X; Thu, 21 Apr 2022 11:57:52 -0300 Date: Thu, 21 Apr 2022 11:57:52 -0300 From: Jason Gunthorpe To: Moritz Fischer Cc: linux-fpga@vger.kernel.org, yilun.xu@intel.com, hao.wu@intel.com Subject: Re: [PATCH] fpga: fpga-mgr: Fix undefined behavior Message-ID: <20220421145752.GU64706@ziepe.ca> References: <20220421143924.68443-1-mdf@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220421143924.68443-1-mdf@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org On Thu, Apr 21, 2022 at 07:39:24AM -0700, Moritz Fischer wrote: > Incrementing void pointers is undefined behavior. AFIACR in the kernel dialect of C this is defined behavior.. Jason