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 23E70C677F1 for ; Mon, 16 Jan 2023 16:59:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232735AbjAPQ7l (ORCPT ); Mon, 16 Jan 2023 11:59:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50880 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233728AbjAPQ6u (ORCPT ); Mon, 16 Jan 2023 11:58:50 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6966736B36 for ; Mon, 16 Jan 2023 08:41:49 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 06A5B61077 for ; Mon, 16 Jan 2023 16:41:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 17A46C433D2; Mon, 16 Jan 2023 16:41:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673887308; bh=ytKKnx4XPAtSjVNE2t7USirP7OAMY/9mG2bxYP6mZsM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R9Pt85BZ6HYJWyCmZuouJwgzlucUG7Df75+dNINGz7fJZtL5z1MsKSGoa6gPa2fdJ nLen2O/7Z68GuUon/8lXcQVlY3QSZGtTxXpI58q/LuWjHiiYbgVbt7z63kdMmyL5EM UD50N6d4hEkeu1uCTBIf1J4yfcb9WkrMlvbrBp04= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yu Liao , Hans de Goede , Sasha Levin Subject: [PATCH 4.19 072/521] platform/x86: mxm-wmi: fix memleak in mxm_wmi_call_mx[ds|mx]() Date: Mon, 16 Jan 2023 16:45:34 +0100 Message-Id: <20230116154850.444774150@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154847.246743274@linuxfoundation.org> References: <20230116154847.246743274@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Yu Liao [ Upstream commit 727cc0147f5066e359aca65cc6cc5e6d64cc15d8 ] The ACPI buffer memory (out.pointer) returned by wmi_evaluate_method() is not freed after the call, so it leads to memory leak. The method results in ACPI buffer is not used, so just pass NULL to wmi_evaluate_method() which fixes the memory leak. Fixes: 99b38b4acc0d ("platform/x86: add MXM WMI driver.") Signed-off-by: Yu Liao Link: https://lore.kernel.org/r/20221129011101.2042315-1-liaoyu15@huawei.com Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede Signed-off-by: Sasha Levin --- drivers/platform/x86/mxm-wmi.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/platform/x86/mxm-wmi.c b/drivers/platform/x86/mxm-wmi.c index 35d8b9a939f9..9c1893a703e6 100644 --- a/drivers/platform/x86/mxm-wmi.c +++ b/drivers/platform/x86/mxm-wmi.c @@ -48,13 +48,11 @@ int mxm_wmi_call_mxds(int adapter) .xarg = 1, }; struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; - struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; acpi_status status; printk("calling mux switch %d\n", adapter); - status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, - &output); + status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, NULL); if (ACPI_FAILURE(status)) return status; @@ -73,13 +71,11 @@ int mxm_wmi_call_mxmx(int adapter) .xarg = 1, }; struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; - struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; acpi_status status; printk("calling mux switch %d\n", adapter); - status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, - &output); + status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, NULL); if (ACPI_FAILURE(status)) return status; -- 2.35.1