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 9B70DC982EE for ; Mon, 21 Sep 2026 19:57:26 +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=TAVGV/5Thua1TFZOVKbuRwl/jAXk2aReC7bLxrqFtsg=; b=csWQlgxfvQ0uK4UqRCMG4mALXz Z2DWGTNyABuibi2O/Dag3bHr4gWTk2aoLI/FycG+MzTh4J+ItxYss3ysJ3eolVVuwmXT+rXic3dA9 ZzM3M9/81Kbw2N+7IHnOQi0mXac2ZMy0S27K4VYvApWcSOx8wlTWvqtbB4FprySPLZYXCUH0zaYLs HZXahEQWxguueTTQ+wGSNvEF50k2fEwgVUK8sROk7YnEPblqjozPk9NoryH4EpaWShtfaaVp0Xu8n QlPf/l1UquV1S5zgLTK/aUYTzg9VQHfk5uWEck9sbkVRczpNAawDmxUv28Pb6ja8rHrI8ONR2YqYn H1cGzT9A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8k8c-00000003HWX-1AZF; Mon, 21 Sep 2026 19:57:18 +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 1x8k8b-00000003HW9-1vEz for linux-arm-kernel@lists.infradead.org; Mon, 21 Sep 2026 19:57:17 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 394A0436F7; Mon, 21 Sep 2026 19:57:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87A3F1F000FF; Mon, 21 Sep 2026 19:57:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790020637; bh=TAVGV/5Thua1TFZOVKbuRwl/jAXk2aReC7bLxrqFtsg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=IdwgEx+YGAuylT795p2nuD/OUN0WwNll7UPKO7jtrFpUGbfB2ob36smndpAzNfWsm 5ppEiNvfzHg0fKrFzZIb+itRMzh6qndqxQr8pFoZUbHgUPHz0VxFNgDSvfymhuRNYU 4mS76GiBu07fKd+7HqmbT9eMiPL/Sq2FkdG2ODfs+YPG8sONNNaJ4VZY+7T14Keboq pyId8WU52CtwkRDtulypkfELySzUMCu1ynPmTUL2MNBTRPooxu4shT3wo+JwvMKNq0 dZkVETyhg0G4jtY6AdWpwAZNxlY9y0DxnPh4Bg3IbGwQYr1v/pYAgOR+3rKYLwDsZI PFqJcTS8OUDfA== 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 16/17] ASoC: loongson: Switch to use acpi_bus_get_primary_device() Date: Mon, 21 Sep 2026 21:55:56 +0200 Message-ID: <2796562.BddDVKsqQX@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/soc/loongson/loongson_card.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/sound/soc/loongson/loongson_card.c b/sound/soc/loongson/loongson_card.c index 6422cc1703b6..9f3907278462 100644 --- a/sound/soc/loongson/loongson_card.c +++ b/sound/soc/loongson/loongson_card.c @@ -196,7 +196,6 @@ static int loongson_card_parse_acpi(struct loongson_card_data *data) struct snd_soc_card *card = &data->snd_card; const char *codec_dai_name; struct acpi_device *adev; - struct device *phy_dev; int i, ret; /* fixup platform name based on reference node */ @@ -204,7 +203,7 @@ static int loongson_card_parse_acpi(struct loongson_card_data *data) if (!adev) return -ENOENT; - phy_dev = acpi_get_first_physical_node(adev); + struct device *phy_dev __free(put_device) = acpi_bus_get_primary_device(adev); if (!phy_dev) return -EPROBE_DEFER; -- 2.51.0