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=-2.8 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 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 D690AC4743F for ; Sat, 5 Jun 2021 23:20:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3BB56140F for ; Sat, 5 Jun 2021 23:20:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230112AbhFEXVx (ORCPT ); Sat, 5 Jun 2021 19:21:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230083AbhFEXVw (ORCPT ); Sat, 5 Jun 2021 19:21:52 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3405AC061766; Sat, 5 Jun 2021 16:20:04 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id h16so7613061pjv.2; Sat, 05 Jun 2021 16:20:04 -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; bh=EHOgEydSh9+f0K7RDourUcztPS+43uYqhQL+HmK3gfc=; b=ck/JbiYSkmyLlHgzOC5W05WQSkIN1yegZ0mNuJiIz2oQxqq82ywWjKn0RN4SmGTo3s e2RmljrWNossh37U6FR89v2++5sdRiDdXQRvTjiQPYZ40cnv6Z5HKtfATIAnhwPW2gg+ 1TmYEnTdX+VR672DZ7QQt+gxjKWgDzNUgdriMN995I+jnLWex2DezAQCvzkPncewP5JW UNddyYwyGGFfO4pgMVLBAaaasGKj4GJIteUt+DU+z5rrNS/j1wfL0kCfs9ekcZ7U7jb8 4M1+9Qgu09seQDXyFVKQuw78vuaYW/yxmeZ4qZlZhNcNP5o24CGICbqLMmZ8yLmetnus I/Jw== 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; bh=EHOgEydSh9+f0K7RDourUcztPS+43uYqhQL+HmK3gfc=; b=MynLSV9hNYOjzEWs2pqzR6hYsm2JIiqzIPq+nh94voSDC8b0lX60WPn9lsT6Xfkqia lMHRs635Yeu7o4Ms57aKcRKsq5Xlz4Ijkga8aaffNZmKVxoNxI4H6TJoWoYsUgKIjsuz KsWLNqUc/jwW84Y3v5zwXU1AUhd3sQySplnOgCgoqpAHkyVObxrC97vN+RLXHPXGWRjh yGpEL9+HGDMmIFDwhplEez0efGWALR5khzyZOtX56go5ml3o/6M3sJwiyL3s3IM+60Pr pBUspJziQrqBIbS1eFfOKyztUBq7g6H7Bm7ePlsfwsocBmD6YYDuAjfUM98xLJKbrwzG 8HfQ== X-Gm-Message-State: AOAM533lYFlCio26ISRIViF2SP98aRGPKWhng18Rz6m6ENVGkIp8m7Id ww2yxXll5p35oStZx5/H4Po= X-Google-Smtp-Source: ABdhPJyhunINVUM8Qu+6CCtPfFcyEZhDYekiYYIchtIxUFECds1bIzuN3AT1+9O6d0G6IPGNLugmNA== X-Received: by 2002:a17:902:bf04:b029:fd:7c7c:bbf3 with SMTP id bi4-20020a170902bf04b02900fd7c7cbbf3mr10858171plb.59.1622935202678; Sat, 05 Jun 2021 16:20:02 -0700 (PDT) Received: from google.com ([2620:15c:202:201:5762:ab6a:6802:ef65]) by smtp.gmail.com with ESMTPSA id z7sm5210936pgr.28.2021.06.05.16.20.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Jun 2021 16:20:01 -0700 (PDT) Date: Sat, 5 Jun 2021 16:19:59 -0700 From: Dmitry Torokhov To: Colin King Cc: Eugen Hristev , linux-input@vger.kernel.org, kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH][next] Input: resistive-adc-touch: Fix uninitialized variable 'press' Message-ID: References: <20210603220809.155118-1-colin.king@canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210603220809.155118-1-colin.king@canonical.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Colin, On Thu, Jun 03, 2021 at 11:08:09PM +0100, Colin King wrote: > From: Colin Ian King > > In the case where st->ch_map[GRTS_CH_PRESSURE] < GRTS_MAX_CHANNELS is false > and also st->ch_map[GRTS_CH_Z1] < GRTS_MAX_CHANNELS is false the variable > press is not initialized and contains garbage. This affects a later > comparison of press < st->pressure_min. If neither of the conditions is true, then st->pressure is also false, and we will not be evaluating condition involving "press". However it is impossible for the compiler/Coverity to figure this out, so I'll apply the patch adjusting the description a bit. Thanks. -- Dmitry