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 2459EC982FA for ; Tue, 22 Sep 2026 14:30:37 +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=POCBszzJ6nkzw018YthAIP9UAGivRig8NSCLZQdHPKc=; b=4KG2E0RiX1flYuXjqvNp8Ixthe bhPjXy5sqaA2MBkI3uSEw8QRGJEAU/OEdozYPU+wvhw+gHs5fgtLDVUFnbLOu3k7GLfKGIU31eclR aLqA0rzmn5FP6jVvCu/MD6Fdm/GezUg9DFRarMWG90WsD29nfphu2kSK4B9H72/WwnYKlCySlK1PA t4FTeVTfHtYjUG40aw3JVxLCKK7slf0WILUs2Fcb+WMLiuys5PdJCnG+d4+ekCPiCQ2nmjsMAuRN9 6Z7+hZ2bjco4CH+puAi7u7dbKoPE7/n/9zqECbX5bvTSNXu2TTrHbSyWVOrX6zlKVKRqBHD23VHGM caL4H5HQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x91Vu-00000005h7N-07jj; Tue, 22 Sep 2026 14:30:30 +0000 Received: from mgamail.intel.com ([192.198.163.11]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x91Vr-00000005h6e-197S for linux-arm-kernel@lists.infradead.org; Tue, 22 Sep 2026 14:30:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1790087427; x=1821623427; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=mXahkIv2RJHhzfh7U3pfRJZ3jKnnu9sUzp7Ckf7hw/I=; b=QFVdFZvArxDHLhszpG+nCtTENeoeKfs6AMnKkTeWosgPRgBHOP62hn1R ZfHGX/q5oDm7vrIYAYUlTsLhqKCRqgOOAuzUKh1oPqkT7P0IObM13LAnl Q76q6VuiEzgDyFkNncRyVmYlKQZs+s8gD5XBQyNTbtbO/aI3YGTqawBKY unwVohvECyFT8pcWyfirvusOrHXv/yux3Byc1xJGb0fjq4Ntq7RwQkSld UkIJehU1KL0GZMzOkuCc34eeFXZJvve4wxak+K/syLQdmuZ+u0GA8s+R4 xs0neN5qRBMi34wm7oigkTmPTsf+Z/qpJ/a1oG6Gf6Y/S/8Ehk/GbYn5G g==; X-CSE-ConnectionGUID: OguGJVMwSJu4+Z/fLGWbkA== X-CSE-MsgGUID: ceSJmf38S5OSmpgs7beZ4w== X-IronPort-AV: E=McAfee;i="6800,10657,11913"; a="101282192" X-IronPort-AV: E=Sophos;i="6.27,116,1787036400"; d="scan'208";a="101282192" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2026 07:30:21 -0700 X-CSE-ConnectionGUID: I/VCzjL/REmW6DwByGaEEg== X-CSE-MsgGUID: m5yp+WLeSfWV6BjZ7FzIOQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,116,1787036400"; d="scan'208";a="299420640" Received: from black.igk.intel.com ([10.91.253.5]) by fmviesa002.fm.intel.com with ESMTP; 22 Sep 2026 07:30:14 -0700 Received: by black.igk.intel.com (Postfix, from userid 1001) id AAEC199; Tue, 22 Sep 2026 16:30:12 +0200 (CEST) Date: Tue, 22 Sep 2026 16:30:12 +0200 From: Mika Westerberg To: "Rafael J. Wysocki" Cc: Linux ACPI , LKML , Andy Shevchenko , 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: Re: [PATCH v1 09/17] thunderbolt: Switch to use acpi_bus_get_primary_device() Message-ID: <20260922143012.GG106095@black.igk.intel.com> References: <7995179.EvYhyI6sBW@rafael.j.wysocki> <1941270.atdPhlSkOF@rafael.j.wysocki> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1941270.atdPhlSkOF@rafael.j.wysocki> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260922_073027_375333_A5E2B86C X-CRM114-Status: GOOD ( 13.46 ) 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 09:51:06PM +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. > > Signed-off-by: Rafael J. Wysocki Acked-by: Mika Westerberg