Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp1869112imu; Sat, 26 Jan 2019 12:44:48 -0800 (PST) X-Google-Smtp-Source: ALg8bN7/EtJB2yEsFcPm3nl8YF4Cly7HY85kvDnY15KasRqWYegA4Rx50KoDh2TQh8CGbbDWU+gF X-Received: by 2002:a62:6503:: with SMTP id z3mr15659430pfb.169.1548535488185; Sat, 26 Jan 2019 12:44:48 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1548535488; cv=none; d=google.com; s=arc-20160816; b=cAm/N6D9In/XYcDueVncsaw/JAtJkXX6/mgp0oy4jugo6yeRmeg0hUPyQGEjEMu8xh DRKP6GOeaHBNvGxf7xsNQVDJV02H6KWXqSUWTkiCYuGwuUoHFAyQeA1waII27yzIk0u9 ky3JXvlaokJm7+7JvaThxZ4Zg+kTd6Rrn6Gj5mFJN4GTRXMNkQpA9yZpnxmZbdSymFcv 0C2M9ArlaH0gaRATl+y2G+QoiKz4roeYeAgUMX8hoxs5YCj9YkzOz9+RbQYKIimEkAUu WLzbK7BIBa4WyYl5EG2JYKUTwnZ32vPMjbt1LVpU+x4cVLW62qN1W7I+zQHCHLgh2AiW FZEg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=HMKgGbqmE4LrfHKnxsFRtesDePD6A4/CfGBReS5ONbY=; b=v5fGwhEZns8BuXcDyYFeiGaJtaeJ7rzSy02f6QnPaWtUnhICD0weionDkf5aKQJVQM fxSnkGRiWM+rhsdo/59SBGXYmaS22mH6hfZAjxKwFpO1fzEOAOuRC35OCQR++KOv5Dok cvXgcYIXcbmKOWKUEm+AVhILX8zOWM6kskoDrCQ4ifHW9jQiVH455KzVJBbFa4dTQa+/ lpjUHW1x/bSvmIV1bEoLFQO6Ug8Ab2jjxaH0bw4Y/nhnLk9FGPkU/QtHNk33Eh1E+LIk /J0P5KcQ7rdtplEzeFkxz73+kBH8nI5gYw9SfKXS5AsXFKZ7PEI2puqGcCK8HJ1SvMyY BCnA== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=GoTxH4pT; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id s2si29105309pgr.285.2019.01.26.12.44.32; Sat, 26 Jan 2019 12:44:48 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=GoTxH4pT; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726405AbfAZUoA (ORCPT + 99 others); Sat, 26 Jan 2019 15:44:00 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:39044 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726249AbfAZUoA (ORCPT ); Sat, 26 Jan 2019 15:44:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=HMKgGbqmE4LrfHKnxsFRtesDePD6A4/CfGBReS5ONbY=; b=GoTxH4pTGeAuvuGyygmm015Wl Csekj4MC2dXYRTRcuU22qSCq4TqHMXcTlMlBBOMqmwVZ2xc7mEAY5XyjBxh5Dn5zVRZdUwSQjjpla Dzv2YTvfJPT+vzG0zPo8YMeUp44Y2upUUIjqzHo6jRR9s8/8DsCsYrWaB5Oay1jy2P87koP4aGhjC 49PDizhC8/c14h9Qsov6soQi6iVWf8aqQI6sDtk1pin6iSU2htVy31LfTOYXgtUOZfRYSnsbOD9M4 vbZYBSRNNl/+7znyKHrM4V/6ADHbsGiVqjdou8sc58TtPnrnbinHdsT71LsVxKB/6IpzeVboP+EGz D1UvFrzdQ==; Received: from dvhart by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1gnUo2-00034Q-DB; Sat, 26 Jan 2019 20:43:58 +0000 Date: Sat, 26 Jan 2019 12:43:55 -0800 From: Darren Hart To: Mattias Jacobsson <2pi@mok.nu> Cc: andy@infradead.org, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] platform/x86: wmi: fix potential null pointer dereferences Message-ID: <20190126204355.GA13882@wrath> References: <20190122200302.19861-1-2pi@mok.nu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190122200302.19861-1-2pi@mok.nu> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 22, 2019 at 09:03:01PM +0100, Mattias Jacobsson wrote: > In the function wmi_dev_match() there are three variables that > potentially can result in a null pointer dereference. Namely: Is this something you have observed? This gets called when a new driver registered for each unassociated device on the bus, so I'm not immediately seeing how dev or driver would end up being NULL here. See: Documentation/driver-model/bus.txt -- Darren Hart VMware Open Source Technology Center