From nobody Thu Sep 24 18:43:30 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 AB0C13C9EF3; Mon, 21 Sep 2026 19:58:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790020705; cv=none; b=tZwX7pu2qnRQyi4zcjk2sYn3TsFBplllqYBt7WQGeH84VJmy3BNkDXBYmU3SbLDzGgYnx3cBc9hwamzRYDVuwVvvcWy4XLqZUsxTOIZnRN00c7/fnKwENu/bW9pIYdNHVKg3eVOixOSYqtxPxkK4TZ0vtojBvWqLu6AmBjJtqLQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790020705; c=relaxed/simple; bh=c71s5BpRWy0b4cyz8ZlwjZg+bOjsBDwE/6wbyqy/XLM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=IjTohXITfhU/qtOn/zxf4SFdsunccgwRPMY7dHDGhSbXBF7DwH94cpu3i0aMbUsd0A0cOTGWLIThDsQM3QSPPH5IqXDmQoCvi/izcCynW49OioQztd0q91znGXXq+LYzx/0OS/5jw5Iy8/4+xiJifMEznUWYrQEYSKZMIq1XlAQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SEe5NuA3; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SEe5NuA3" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 } =20 cs35l41->dacpi =3D adev; - struct device *physdev __free(put_device) =3D - get_device(acpi_get_first_physical_node(adev)); + struct device *physdev __free(put_device) =3D acpi_bus_get_primary_device= (adev); if (!physdev) { acpi_dev_put(adev); return -ENODEV; --=20 2.51.0