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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 5B964C2D0B1 for ; Wed, 4 Dec 2019 18:15:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 33089206DF for ; Wed, 4 Dec 2019 18:15:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575483312; bh=zat/MVf073KU6bXat8DLZ29ByD6aqwErnodR3aOK3hc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Pgm0G0Wz9pKtD/VpG0bLIIWwC13GePpzCor1WtmTKnGpaOJ0s0+f5xXRGnnhNZQEn sWolum9oa+Kj9yBR0brGIfGE2wb3SnrTqu0AuhzAWP1OXQiDF0yzKY5HnXMENMRCsT kXJHqX0VM89FZOSFmpreHiwga0jGUHyQK/6kDzeo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731949AbfLDSOn (ORCPT ); Wed, 4 Dec 2019 13:14:43 -0500 Received: from mail.kernel.org ([198.145.29.99]:44086 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728271AbfLDSOk (ORCPT ); Wed, 4 Dec 2019 13:14:40 -0500 Received: from localhost (unknown [217.68.49.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8AD9F20833; Wed, 4 Dec 2019 18:14:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575483280; bh=zat/MVf073KU6bXat8DLZ29ByD6aqwErnodR3aOK3hc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=u0QYD3KFzSUU8ywRXcGQ5Aovhfgm+HwWuIrI9D5V7xe3JgcbwrY0z085uJFMxvPmP V8ddtAQ8SauhQA6Qo6RqU+RBDb3j6YTEMqlTIC2zvdKrrh/ZEr5nUxoLb4ndsyRqqo B5rNCMVdw2PuANEZEMV12y63PHkXT/4IscRzOSwY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans de Goede , Andy Shevchenko Subject: [PATCH 4.9 124/125] platform/x86: hp-wmi: Fix ACPI errors caused by too small buffer Date: Wed, 4 Dec 2019 18:57:09 +0100 Message-Id: <20191204175326.973098408@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191204175308.377746305@linuxfoundation.org> References: <20191204175308.377746305@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hans de Goede commit 16245db1489cd9aa579506f64afeeeb13d825a93 upstream. The HP WMI calls may take up to 128 bytes of data as input, and the AML methods implementing the WMI calls, declare a couple of fields for accessing input in different sizes, specifycally the HWMC method contains: CreateField (Arg1, 0x80, 0x0400, D128) Even though we do not use any of the WMI command-types which need a buffer of this size, the APCI interpreter still tries to create it as it is declared in generoc code at the top of the HWMC method which runs before the code looks at which command-type is requested. This results in many of these errors on many different HP laptop models: [ 14.459261] ACPI Error: Field [D128] at 1152 exceeds Buffer [NULL] size 160 (bits) (20170303/dsopcode-236) [ 14.459268] ACPI Error: Method parse/execution failed [\HWMC] (Node ffff8edcc61507f8), AE_AML_BUFFER_LIMIT (20170303/psparse-543) [ 14.459279] ACPI Error: Method parse/execution failed [\_SB.WMID.WMAA] (Node ffff8edcc61523c0), AE_AML_BUFFER_LIMIT (20170303/psparse-543) This commit increases the size of the data element of the bios_args struct to 128 bytes fixing these errors. Cc: stable@vger.kernel.org BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=197007 BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=201981 BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1520703 Signed-off-by: Hans de Goede Signed-off-by: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman --- drivers/platform/x86/hp-wmi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/platform/x86/hp-wmi.c +++ b/drivers/platform/x86/hp-wmi.c @@ -90,7 +90,7 @@ struct bios_args { u32 command; u32 commandtype; u32 datasize; - u32 data; + u8 data[128]; }; struct bios_return { @@ -198,7 +198,7 @@ static int hp_wmi_perform_query(int quer .command = write ? 0x2 : 0x1, .commandtype = query, .datasize = insize, - .data = 0, + .data = { 0 }, }; struct acpi_buffer input = { sizeof(struct bios_args), &args }; struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; @@ -206,7 +206,7 @@ static int hp_wmi_perform_query(int quer if (WARN_ON(insize > sizeof(args.data))) return -EINVAL; - memcpy(&args.data, buffer, insize); + memcpy(&args.data[0], buffer, insize); wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);