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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D07D7C433FE for ; Mon, 18 Oct 2021 04:47:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A72C661279 for ; Mon, 18 Oct 2021 04:47:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229583AbhJREt7 (ORCPT ); Mon, 18 Oct 2021 00:49:59 -0400 Received: from verein.lst.de ([213.95.11.211]:60374 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229470AbhJREt6 (ORCPT ); Mon, 18 Oct 2021 00:49:58 -0400 Received: by verein.lst.de (Postfix, from userid 2407) id F39BA67373; Mon, 18 Oct 2021 06:47:45 +0200 (CEST) Date: Mon, 18 Oct 2021 06:47:45 +0200 From: Christoph Hellwig To: Zqiang Cc: Hao Sun , Hillf Danton , hch@infradead.org, willy@infradead.org, Linux MM , Linux Kernel Mailing List , Christoph Hellwig , syzkaller-bugs@googlegroups.com Subject: Re: WARNING in __init_work Message-ID: <20211018044745.GA23657@lst.de> References: <20210907074432.3711-1-hdanton@sina.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 18, 2021 at 12:43:38PM +0800, Zqiang wrote: > This is the details of the test, Hope it helps you Call me stupid, but I can only find the trace and linked to unreadable google sites that wan't me to log in somehow and no actual details. If you have a direct link to the reproducer (an attachment would do it as well) I'd love to try it myself. Otherwise this commit in the block-5.15 tree should help to catch what I suspect is the root cause (final ref drop before unregister) earlier and with a better backtrace: https://git.kernel.dk/cgit/linux-block/commit/?h=block-5.15&id=a20417611b98e12a724e5c828c472ea16990b71f