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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EC2F2C982FA for ; Tue, 22 Sep 2026 07:08:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:References:CC:To: Subject:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=aInSbDS30ifoUmnc/fUpkyf8/+8QUMzPPs2qqKBSlX8=; b=HZN8O9uPO0RaX0M+EnEDgYW2O6 FfDPxDQ0UOKmGRtdzRcXLX3lGI6R0qszHJv0oEmHsYUYW4dM2n/pUgG7pbENT+9CXDt4laFPsgqwm XLUx8j1pGLzdW7LGeNPfnYhaNDVZH9KP+rL5qYrMOzlLdFmpFWufCZn+BoLdw9vcyjfiVLM4WZRvo JxAmrXMqjYUvtJfmckhWZT+VjWJQAIVXbUJ3p5vbwYUGYUyjnNs+4Ep0BFRuxR/O7KouOjz30l5gu na8Wk8oiYPG2/rx0p6//Yuj35gzISoXXb1dK8QCYpv7bHBWAOlFxZaGrYO3p8rh5GizR6F5iBhzV3 D4bCwBqQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8tf8-00000004JDg-1AnH; Tue, 22 Sep 2026 06:07:30 +0000 Received: from canpmsgout04.his.huawei.com ([113.46.200.219]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8tf4-00000004JCx-0J5m for linux-arm-kernel@lists.infradead.org; Tue, 22 Sep 2026 06:07:28 +0000 dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=aInSbDS30ifoUmnc/fUpkyf8/+8QUMzPPs2qqKBSlX8=; b=Ee/wrjoqSFYP8zBYhNu5w3jqjS6jExtcX3HaT7hT0uCzGwRpFupGftWHBERtLfm9OtJy/fygn E5/Ye4VELn6Uuw6hEUgrQ21+ZLAi6Qm/UdYR5LgSVpF2qgmQ3nnmpfl0DSKvvV1Wunacm8ENvz2 Xo0fKsc+HiFcEG7ju9V5WpU= Received: from mail.maildlp.com (unknown [172.19.163.0]) by canpmsgout04.his.huawei.com (SkyGuard) with ESMTPS id 4hpq8p1t10z1prN4; Tue, 22 Sep 2026 13:56:10 +0800 (CST) Received: from whupemk200014.china.huawei.com (unknown [7.152.185.79]) by mail.maildlp.com (Postfix) with ESMTPS id CA75140537; Tue, 22 Sep 2026 14:07:13 +0800 (CST) Received: from [10.174.179.24] (10.174.179.24) by whupemk200014.china.huawei.com (7.152.185.79) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Tue, 22 Sep 2026 14:07:10 +0800 Subject: Re: [PATCH v1 02/17] ACPI: amba: Switch to use acpi_bus_get_primary_device() To: "Rafael J. Wysocki" , Linux ACPI CC: LKML , Andy Shevchenko , Mika Westerberg , Lorenzo Pieralisi , Sudeep Holla , , Ard Biesheuvel , Ilias Apalodimas , , Will Deacon , Robin Murphy , "Joerg Roedel (AMD)" , Mark Pearson , "Derek J. Clark" , Hans de Goede , =?UTF-8?Q?Ilpo_J=c3=a4rvinen?= , , David Rhodes , Richard Fitzgerald , Jaroslav Kysela , Takashi Iwai , , Shenghao Ding , Kevin Lu , Baojun Xu , Sen Wang , Vijendar Mukunda , Venkata Prasad Potturu , Liam Girdwood , Mark Brown , Cezary Rojewski , Peter Ujfalusi , Bard Liao , Kai Vehmanen , Pierre-Louis Bossart , Binbin Zhou , Andreas Noever , Mika Westerberg , Yehezkel Bernat References: <7995179.EvYhyI6sBW@rafael.j.wysocki> <3362405.5fSG56mABF@rafael.j.wysocki> From: Hanjun Guo Message-ID: <7eeeb332-ece6-4396-5871-91ece6d6f18e@huawei.com> Date: Tue, 22 Sep 2026 14:07:09 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <3362405.5fSG56mABF@rafael.j.wysocki> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Originating-IP: [10.174.179.24] X-ClientProxiedBy: kwepems100001.china.huawei.com (7.221.188.238) To whupemk200014.china.huawei.com (7.152.185.79) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260921_230726_776607_D28B33A1 X-CRM114-Status: GOOD ( 13.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2026/9/22 3:46, Rafael J. Wysocki wrote: > From: "Rafael J. Wysocki" > > Replace acpi_get_first_physical_node() that is slated for removal > with acpi_bus_get_primary_device() that takes a reference to the > device it is about to return. > > This addresses a potential use-after-free that may occur if the > device returned by acpi_get_first_physical_node() is removed right > after dropping its ACPI companion's physical_node_lock in that > function. > > Signed-off-by: Rafael J. Wysocki > --- > drivers/acpi/arm64/amba.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > Acked-by: Hanjun Guo Thanks Hanjun