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 62E71C982EE for ; Mon, 21 Sep 2026 19:58:30 +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-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QHcB4o2w3Zdn0ye43c8OGi6J8wemapWUr6CsKkoAjrE=; b=DOWi4+KRBnXP5KgWfYvrJGx0JG GWTk4YSDfocHRJ8gUyA/F8opBZNJIP1MSH4YeMvsnCoxd3TD/tGSxWAoBbRwEobzDsto9k88Gk+mc uQUeqfQX208MSCD+4HR3Gu5mOHGjj+ReiMMrDgtl8jjnxkuMHK/ej6/zzST01UAwzPBDwYyojkGDM dOpS2g4Cs1bYQ/sVwznDZSMonCWgvvm+vIPojhbge2iM8XZNxt45ASmnU7hX2eCPO+P4kp+7ulLJL 7duQ4aZMmf0wZCsoMMq0MTR8oVt98yLRJvwIADHZ6D9q1Bf4kMuWojgfv7XiCImnEOuOY3KFQN1Sn sOMbxkcg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8k9g-00000003Hyp-0Hsm; Mon, 21 Sep 2026 19:58:24 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8k9f-00000003HyZ-28gP for linux-arm-kernel@lists.infradead.org; Mon, 21 Sep 2026 19:58:23 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 45DEB42A00; Mon, 21 Sep 2026 19:58:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79EAD1F000FF; Mon, 21 Sep 2026 19:58:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790020703; bh=QHcB4o2w3Zdn0ye43c8OGi6J8wemapWUr6CsKkoAjrE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=SEe5NuA3oV+2rlY4NDNTgzgN+EhUtl/RhRX7W82zXhVGfmIVYdvu00kG46saiPclP pNFVVc/p19ABBaHJ/C4VhAL9jnfUIpjaov1ujZU+I/YuEGj/oke7/muKpYt5aUCLRZ MIPRQ9EhPcSmVSsMeha3pVlc+EjSi8K60gChy7K/69/KzLr8HH+Vh/iCP61PTsHRf0 JlnqF+sfNF+woCNll0zPPxyyyxcae6yot0V6v5gW6cjtKL3cs5u1wRT99jm4v0VQGH x2mw9C8Lo6GgvKys4LOX9loRnSPyB8soJC1eBHy+snWuv/LTrqASg5EaywNPrz2TEF Vtk7Xtu50mW7g== From: "Rafael J. Wysocki" To: Linux ACPI Cc: LKML , Andy Shevchenko , Mika Westerberg , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , linux-arm-kernel@lists.infradead.org, Ard Biesheuvel , Ilias Apalodimas , linux-efi@vger.kernel.org, Will Deacon , Robin Murphy , "Joerg Roedel (AMD)" , Mark Pearson , "Derek J. Clark" , Hans de Goede , Ilpo =?UTF-8?B?SsOkcnZpbmVu?= , platform-driver-x86@vger.kernel.org, David Rhodes , Richard Fitzgerald , Jaroslav Kysela , Takashi Iwai , linux-sound@vger.kernel.org, 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 Subject: [PATCH v1 10/17] ALSA: hda: cs35l41: Switch to use acpi_bus_get_primary_device() Date: Mon, 21 Sep 2026 21:51:44 +0200 Message-ID: <2290124.Icojqenx9y@rafael.j.wysocki> Organization: Linux Kernel Development - Intel In-Reply-To: <7995179.EvYhyI6sBW@rafael.j.wysocki> References: <7995179.EvYhyI6sBW@rafael.j.wysocki> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" 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 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 --- sound/hda/codecs/side-codecs/cs35l41_hda.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/sound/hda/codecs/side-codecs/cs35l41_hda.c b/sound/hda/codecs/side-codecs/cs35l41_hda.c index 62296be45c55..32abb71dd401 100644 --- a/sound/hda/codecs/side-codecs/cs35l41_hda.c +++ b/sound/hda/codecs/side-codecs/cs35l41_hda.c @@ -1926,8 +1926,7 @@ static int cs35l41_hda_read_acpi(struct cs35l41_hda *cs35l41, const char *hid, i } cs35l41->dacpi = adev; - struct device *physdev __free(put_device) = - get_device(acpi_get_first_physical_node(adev)); + struct device *physdev __free(put_device) = acpi_bus_get_primary_device(adev); if (!physdev) { acpi_dev_put(adev); return -ENODEV; -- 2.51.0