From mboxrd@z Thu Jan 1 00:00:00 1970 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 7D16A3AE6E5; Mon, 21 Sep 2026 19:57:17 +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=1790020638; cv=none; b=SRBmzPl5umdX2+aBhxdZhK7ebb6v1ygdEMUwftsg1OMgTp2h/3UGssA/n1wMxvDmbVOsza7FExn9pRKcgSuVNGcFzTuz6ZuYKRV74QtVirvYH038hbUe0816caao4SWYrkYH34rSXJLDbXm96ojb1i7/WQTlt0IhSgamULh4aSE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790020638; c=relaxed/simple; bh=iPsHQbbpQwUFp6xKd/dCzNUBdpGDy/+EYaeTWLuWMnA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=UDWGtChOfpe8Cr5j+R0TK9WcCYBXnLtaHY5aldb1/F0ArC7+oU6eJLTRrI1TsCYC0RQbnDaSFDpV1C5y4eb2DH0RbQXsnrxB6ITLKGIE/vZN1fSrPzIPcD+ozNyqNT7w8yH7j7BPAYmQm1bnH2uu2WCOdEX7z0p7OY/a/O2sVWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IdwgEx+Y; 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="IdwgEx+Y" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit 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/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