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 DE352C433F5 for ; Tue, 25 Jan 2022 14:46:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1389125AbiAYOqW (ORCPT ); Tue, 25 Jan 2022 09:46:22 -0500 Received: from mx3.molgen.mpg.de ([141.14.17.11]:43481 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1579916AbiAYOlE (ORCPT ); Tue, 25 Jan 2022 09:41:04 -0500 Received: from [192.168.0.2] (ip5f5aeaa2.dynamic.kabel-deutschland.de [95.90.234.162]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: pmenzel) by mx.molgen.mpg.de (Postfix) with ESMTPSA id EA43161E6478B; Tue, 25 Jan 2022 15:40:54 +0100 (CET) Message-ID: <2ebf7968-a324-6f98-e178-45d4d19cfb48@molgen.mpg.de> Date: Tue, 25 Jan 2022 15:40:54 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: mfd/intel_pmc_bxt: `intel_pmc_get_resources()` results in page fault Content-Language: en-US To: Mika Westerberg Cc: Zha Qipeng , linux-kernel@vger.kernel.org, Andy Pont References: <92c233bc-d1e0-b180-efaa-27e05fbd732b@molgen.mpg.de> From: Paul Menzel In-Reply-To: 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 [Cc: +Andy] Dear Mika, Am 25.01.22 um 15:26 schrieb Mika Westerberg: > On Tue, Jan 25, 2022 at 02:08:53PM +0100, Paul Menzel wrote: >> `intel_pmc_get_resources()` does not set the name member in the `resource` >> struct `gcr_res` resulting in a page fault. > > On which system you reproduce this, The dump contains the name: Hardware name: Star Labs Lite/Lite, BIOS 8 01/24/2022 > and how? Can you also share ACPI dump from that system. Note, I only forwarded this from a report in #coreboot. The reporter Andy is now in Cc. Unrelated from that information, the Linux kernel should never run into a page fault and not trust system data. Kind regards, Paul