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=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=unavailable 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 32AFEC4360F for ; Thu, 14 Mar 2019 23:50:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EA85E21873 for ; Thu, 14 Mar 2019 23:49:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="p+7/XqVo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728005AbfCNXt6 (ORCPT ); Thu, 14 Mar 2019 19:49:58 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:48424 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727332AbfCNXt6 (ORCPT ); Thu, 14 Mar 2019 19:49:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To: Subject:Sender:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=pDx0F0b/cwlQ8flBSxOnlEDXSq4rrGSdcWydb6YYey0=; b=p+7/XqVoIf+C8N4dV6O1cZ+Iz fdY9KXz/cjkLvpwflu7nfZ6yiDgK9uCPdtz0j8Jqi1rX3feklRyz8mFE6uqdCz7BN3swAT+TQILEM to0uT/ntftd6241U7oUOMqm9WHMdMP6+Avp0qs9rbZx2mSp39SPUrRFXGCfmv06IYB1Eist2+7JVb AjTaK2OQTT+puXdoVfDhoA2lSAVRUyKzS8eeu5iXFyqaHtJf0BPMkhhlsnTrUBglRTMxb1bS1t+Ep O3JymfExqVheUEECeZkCYbVYDo1lg8+jXsSm/qZMo7FIT2XLQNbZFMhttzagr7pHVp+40kQChBAcV 04LdDfx5g==; Received: from static-50-53-52-16.bvtn.or.frontiernet.net ([50.53.52.16] helo=dragon.dunlab) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1h4a6l-0005ay-QW; Thu, 14 Mar 2019 23:49:55 +0000 Subject: Re: paride/pf.c: blk-mq use-after-free (kernel v5.0) To: Jens Axboe , linux-block Cc: LKML , Tim Waugh , linux-parport@lists.infradead.org References: <30c63b2d-92d2-51be-40f0-62cada110388@infradead.org> <7d24a06f-f219-e50a-e8f8-915a6cc1b796@infradead.org> <59cb035e-6880-de5a-33c5-d4db6ed910f4@kernel.dk> From: Randy Dunlap Message-ID: <4a2adc33-ef38-6a5f-65ee-8fcfaa0948a9@infradead.org> Date: Thu, 14 Mar 2019 16:49:28 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: <59cb035e-6880-de5a-33c5-d4db6ed910f4@kernel.dk> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/14/19 4:43 PM, Jens Axboe wrote: > On 3/13/19 5:09 PM, Randy Dunlap wrote: >> On 3/11/19 6:34 PM, Randy Dunlap wrote: >>> On 3/11/19 6:25 PM, Randy Dunlap wrote: >>>> [Has this already been addressed/fixed?]>> >>> >>> Same bug occurs with paride/pcd.c driver. >> >> This still happens (in blk-mq) in v5.0-11053-gebc551f2b8f9 of Mar. 12, 2019, >> around 4pm PT. [caused by paride: pf.c and pcd.c) > > I'll take a look at this, been busy with other stuff. How are you > reproducing this? I'm assuming you don't actually have any hardware :-) Right. I just load the module (pf or pcd), unload it, and then load it again. -- ~Randy