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 BE9524D2EE0; Tue, 22 Sep 2026 09:52:04 +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=1790070731; cv=none; b=sApib2lcI2gPwK6t8B00V2EzX5lgC2HqFQZSWIq5EJxDpQx48/ejC+ErjkThrzUT+hl4CWvm5OFBV61dJVWg69VflALnGsysWrj6m14d7eg/Ef6OrDcn2bt6gvBLU5Fys9AOSupQOBnUu95Do/SHMuuJW4HqYQ1kT9LuNxYjEcE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790070731; c=relaxed/simple; bh=zor2ROdLd0rMo1FQEhXOx9r0zbUpL74fNqfExstZnjw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=OQUnzwuXPjmlt4JVnWja0gTjMHAO5d+d3exg/008UHSZJ+iUR8nsL/XNs3VoLo17AObfWfEqaS70q2oOh6P2o5TDUC9LMBnfolKLZyjJml87PvJyisoLGzJdTyYKbYLln5nbXo1p2lPx1NnU4ycbcc0gaft8Iv5hAn/NLzUOa6E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LMT8gm1A; 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="LMT8gm1A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C923A1F00893; Tue, 22 Sep 2026 09:51:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790070721; bh=XsLswjZySdqIFqF2ilbCxdY4qgyZ6CXrVVKDQsk1y4g=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=LMT8gm1AoEFT7gGBv+UHvLcfX07spj9zLtsGDHX0ve90f6yq0SZFLZPQpvEq8/N4m MI6iTv11VPAo1J4kauwU+6zLxtDIwXUC964L4C7g1YLJq8FrypYsPFmf/vUt/mVbiP MnY6xODa9WZzv2IDSSTqS+KAbdW0T+BfhD8qMxdeGpLgGm79CWChCpiZXc+Kje8zYk A0xGKSz8y/wbQdh3N8uwV8KtmAdX/bn+y57m6j7PtFH0CVrZsXlsUCIv38/XsRX0ff mge0QwP7f3UNAjRSJaRSYzeyHBU9CEx6vTG2iVg+TMffw61IvtKlPc89c/3inA5WLE 9GcGsuZ/Emhhg== Date: Tue, 22 Sep 2026 10:51:52 +0100 From: Sudeep Holla To: "Rafael J. Wysocki" Cc: Linux ACPI , LKML , Sudeep Holla , Andy Shevchenko , Mika Westerberg , Lorenzo Pieralisi , Hanjun Guo , 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 =?iso-8859-1?Q?J=E4rvinen?= , 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: Re: [PATCH v1 02/17] ACPI: amba: Switch to use acpi_bus_get_primary_device() Message-ID: <20260922-tiny-pompous-stork-30beeb@sudeepholla> References: <7995179.EvYhyI6sBW@rafael.j.wysocki> <3362405.5fSG56mABF@rafael.j.wysocki> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3362405.5fSG56mABF@rafael.j.wysocki> On Mon, Sep 21, 2026 at 09:46:37PM +0200, 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. > Reviewed-by: Sudeep Holla -- Regards, Sudeep