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=-2.2 required=3.0 tests=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 BADE8C432C0 for ; Thu, 28 Nov 2019 08:54:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 96C6C2176D for ; Thu, 28 Nov 2019 08:54:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727644AbfK1Iyx (ORCPT ); Thu, 28 Nov 2019 03:54:53 -0500 Received: from isilmar-4.linta.de ([136.243.71.142]:42038 "EHLO isilmar-4.linta.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726609AbfK1Iyx (ORCPT ); Thu, 28 Nov 2019 03:54:53 -0500 X-isilmar-external: YES X-isilmar-external: YES Received: from owl.dominikbrodowski.net (owl-tcp.brodo.linta [10.1.0.111]) by isilmar-4.linta.de (Postfix) with ESMTPSA id D18BE200A96; Thu, 28 Nov 2019 08:54:51 +0000 (UTC) Received: by owl.dominikbrodowski.net (Postfix, from userid 1000) id DF81A80237; Thu, 28 Nov 2019 09:54:47 +0100 (CET) Date: Thu, 28 Nov 2019 09:54:47 +0100 From: Dominik Brodowski To: linux-kernel@vger.kernel.org, x86@kernel.org Subject: unchecked MSR access error in throttle_active_work() Message-ID: <20191128085447.GA3682@owl.dominikbrodowski.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.12.2 (2019-09-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On most recent mainline kernels (such as 5.5-rc0 up to a6ed68d6468b), I see the following output in dmesg during startup: [ 78.016676] unchecked MSR access error: WRMSR to 0x19c (tried to write 0x00000000880f3a80) at rIP: 0xffffffff84ab5742 (throttle_active_work+0xf2/0x230) [ 78.016686] Call Trace: [ 78.016694] process_one_work+0x247/0x590 [ 78.016703] worker_thread+0x50/0x3b0 [ 78.016710] kthread+0x10a/0x140 [ 78.016715] ? process_one_work+0x590/0x590 [ 78.016735] ? kthread_park+0x90/0x90 [ 78.016740] ret_from_fork+0x3a/0x50 Any clues? Thanks, Dominik