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=-5.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 036B4C433DF for ; Mon, 12 Oct 2020 22:01:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 956CC2074F for ; Mon, 12 Oct 2020 22:01:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LxA2YTmX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731528AbgJLWBb (ORCPT ); Mon, 12 Oct 2020 18:01:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52648 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727778AbgJLWBb (ORCPT ); Mon, 12 Oct 2020 18:01:31 -0400 Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0842C0613D0; Mon, 12 Oct 2020 15:01:29 -0700 (PDT) Received: by mail-pg1-x541.google.com with SMTP id x16so15763598pgj.3; Mon, 12 Oct 2020 15:01:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=bfkpkKc5//vLPHmkF2yidzgAEep/vbh2udDMyO66d9I=; b=LxA2YTmXyfkffzXPRasT4DhLlVDwrppDBqS/hYVEa1ZSdEuAFT7jF3k8PnudIxlic+ vci88/yKwtYtJGw5zKC31lHWOko9jk+qJQPSmuilYvW04CpvYb5duxTffBG+jmLa5gNq xLp2mfsU7UCJ2xywQLHvokdmwop5h1AsjIEvK5BucvqQiY5AEHURu8clCJtltLxTIg+/ 5XXDktjCbQtPSjWinQyiV2Fh3ggMqV0+su/i3HYBbSOvLi7mObVbvtD/PtaHW6Hy2n7p ywly2vTORbdlmitE2kK0Sb7n9bWXotmeo5+QYuHGB9xquid5zhi5soazgK/MmB8Yg8zm LRVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=bfkpkKc5//vLPHmkF2yidzgAEep/vbh2udDMyO66d9I=; b=J/oLQhtNwG6uSEt4M8k1M5g8OCHCfqEbfeg8kmDskC4ND9XTX+4zHO8QHIF2VgEmFJ az2HJWRDLj3dj4ayDLykczTeRYYbpOjd/pjaI9YteBwp622+XKi5xO7T/xSGq7ztDINM YzXFrDqIKqVrvs/IUN1434TKdZIIIQzTyTJwdXcfyvjcWLz0R+mtzkG0sO5lixt5eVvG dvlfN3gMIIpjw+ysiVpLOwRdCXwoQVbp35dt3D95uDrjohmhbkxL0iDzDRuxTtwGq3jL qdNuhTp0QDBtSdTQwzk1mMwbmHAIh7Bh3UmMeG98tEI3LbxQopNfDL4hSOcO6g2P/EHP AcSw== X-Gm-Message-State: AOAM531vOGwuX9SeSYUXFQz+qBKbWHc1S/q1lVDyC6l3SYIrzXa1Y31D zQNDMA7NYxx5SBnlRYZTgKSemmACmq8= X-Google-Smtp-Source: ABdhPJwLUvhoIqW41HExMySdxlZZViQPZ50hdtDgotqFyk1XoGTdXqSoNvzoyILOXnkJHyElqoVeGA== X-Received: by 2002:a17:90a:e64f:: with SMTP id ep15mr8806928pjb.95.1602540089414; Mon, 12 Oct 2020 15:01:29 -0700 (PDT) Received: from hoboy (c-73-241-114-122.hsd1.ca.comcast.net. [73.241.114.122]) by smtp.gmail.com with ESMTPSA id d145sm22065668pfd.136.2020.10.12.15.01.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Oct 2020 15:01:28 -0700 (PDT) Date: Mon, 12 Oct 2020 15:01:26 -0700 From: Richard Cochran To: trix@redhat.com Cc: natechancellor@gmail.com, ndesaulniers@google.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com Subject: Re: [PATCH] ptp: ptp_clockmatrix: initialize variables Message-ID: <20201012220126.GB1310@hoboy> References: <20201011200955.29992-1-trix@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201011200955.29992-1-trix@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Oct 11, 2020 at 01:09:55PM -0700, trix@redhat.com wrote: > From: Tom Rix > > Clang static analysis reports this representative problem > > ptp_clockmatrix.c:1852:2: warning: 5th function call argument > is an uninitialized value > snprintf(idtcm->version, sizeof(idtcm->version), "%u.%u.%u", > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > idtcm_display_version_info() calls several idtcm_read_*'s without > checking a return status. So why not check the return status? Your patch papers over the issue. Thanks, Richard