From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from canpmsgout04.his.huawei.com (canpmsgout04.his.huawei.com [113.46.200.219]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 55B8247C106; Tue, 22 Sep 2026 06:07:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.219 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790057242; cv=none; b=Exlfud+67tp0f3wg4w1x84+fwF20pbPNoUDiG0OelEPectw1t0zHoOBwrqRMst9H98hnOPPa2WGhLuthAJK3jf4PCQ9JX5CNst9r+44XIG15xkKN5g1ysY9+lizau2KDIvlqA3ghq9zqVGuKStrU3IVci9h2zXhQhmnTcAJsHKs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790057242; c=relaxed/simple; bh=a2HIyQTUPGerAKK4KAQO5LxPEq1Q8QzWIgJhmWSrADc=; h=Subject:To:CC:References:From:Message-ID:Date:MIME-Version: In-Reply-To:Content-Type; b=oCxk4qtTuZOgko2dAbmhUHJ362vRQd3BVCJrKfgnsyPRsf1lu6uFEvtb+DctVTZTJF6qx3jTbSO82B/HzRTasA43xSoRNCdbPxr/BKugHY0asMh57C6KOdTUPv6fRD6AOUOvi0cBqzqo8NzpU1UZPANTXt5QpmA/iTZuR9QONcM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b=Ee/wrjoq; arc=none smtp.client-ip=113.46.200.219 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b="Ee/wrjoq" 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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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-ClientProxiedBy: kwepems100001.china.huawei.com (7.221.188.238) To whupemk200014.china.huawei.com (7.152.185.79) 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