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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3EC4C433DF for ; Thu, 18 Jun 2020 08:28:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 91416208DB for ; Thu, 18 Jun 2020 08:28:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592468911; bh=rsbp6hJoUotVkub0Zjiq15CM0A4qZNm99xzB9sFqpWY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=twd6sZOIE96RWwJBZN+Me+prgX/aK4bkdnM+FP8eb2pyG1VbxGPGyavqH4B/8QXrt RgumDhj3CxoSBMXd582WutayJDyv94qbFxEyYSUR+fQbNy5e9X91p+aWNOdFu3F7WF R6ik6X+4/chQDekTNyYxA0xa3rBX4ra0g0ujhWe4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728632AbgFRI23 (ORCPT ); Thu, 18 Jun 2020 04:28:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:51958 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728493AbgFRI20 (ORCPT ); Thu, 18 Jun 2020 04:28:26 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C8248208DB; Thu, 18 Jun 2020 08:28:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592468906; bh=rsbp6hJoUotVkub0Zjiq15CM0A4qZNm99xzB9sFqpWY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=s2kasy+IMIHSzwroVcoSz0bT9MAI1wdYjsNKJOuHiiqAmBWHsEotEl4tXsMgOodkK NhRkOOve2xQ/nCjpFBtQmvaEiQrT0cN3l2l3Ncq9psnZ+u39krBN6ZGIyQXtFc1nf3 fGCeW/FiKqZ7iY6pgOt+AlZPckCxdr8GU4Q9LbYA= Date: Thu, 18 Jun 2020 10:28:18 +0200 From: Greg KH To: "Zhang, Qiang" Cc: "balbi@kernel.org" , "linux-usb@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: =?utf-8?B?5Zue5aSNOiDlm57lpI06IFtQQVRD?= =?utf-8?Q?H_v2=5D_usb=3A_gadget?= =?utf-8?Q?=3A?= function: printer: fix use-after-free in __lock_acquire Message-ID: <20200618082818.GA1058534@kroah.com> References: <20200608071622.33081-1-qiang.zhang@windriver.com> <20200608073305.GA252221@kroah.com> <20200609094848.GA533476@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 10, 2020 at 04:58:44AM +0000, Zhang, Qiang wrote: > cdev object reference count and "struct printer_dev" object > reference count(kref), This two reference counts do not conflict. in > file usb-skeleton.c also used a similar method， "struct usb_skel" > contains kref members. I do not understand what you are referring to here, sorry. greg k-h