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 35E90C982FA for ; Tue, 22 Sep 2026 09:52:09 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XsLswjZySdqIFqF2ilbCxdY4qgyZ6CXrVVKDQsk1y4g=; b=kbMAF8gOXyyKzHxUEkPXDgRFsV EGK2O8iwNGU6zGnopZt8snTP/E4KV92JWarz4I5RdvhPfgszUW+/Zfcvy6QXIrrtgmGpvTa8WNJmu Xgb2/RzAfkNWwpAPi0Xy/vfVT13c6JsMr3VmbV6ll9IKzqwj9gN3v4PDLahSYWz01t5+yyMkbv13C KmWiJ5QALRRR6Zdvq2wt1G2wNvl9KeBlLI/pLRl6tg+5dR6882VNgRcNWy0P7m/J6lo70KPKJox9k qxx4nXcRNBEfMdnwcfrTr5hajorUiHfRv280o4Dk3Or2uy0E3uBwMuDSGuK/94wwvQJhIlptF+7Ed +n37/4tg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8xAQ-00000004yYb-46At; Tue, 22 Sep 2026 09:52:02 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8xAP-00000004yYG-34EA for linux-arm-kernel@lists.infradead.org; Tue, 22 Sep 2026 09:52:01 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 791FF4377A; Tue, 22 Sep 2026 09:52:01 +0000 (UTC) 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3362405.5fSG56mABF@rafael.j.wysocki> 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 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