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=-7.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 E057AC43603 for ; Thu, 19 Dec 2019 23:30:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A931F24679 for ; Thu, 19 Dec 2019 23:30:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576798258; bh=S5VBe2V6XP9JXlwOSx/7XHsQVvqLUe9FX070QiGd6qk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=AB9GMFeaMrdblJeVE69De5Xqv7mY8RByJcJm1HpcLIAS/bETkPcqWFhfhvVn1xEOB 3aN1QkDju+wjTi9cW+sqEcbnbXZqH3AOapalKJfh52rR2JEcgztOpDoHGe2/sHNh3S z3VYetO/Hzd0Ll0wzuWZJ4tgpy++L6OJV3tdol8s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727071AbfLSXa5 (ORCPT ); Thu, 19 Dec 2019 18:30:57 -0500 Received: from mail.kernel.org ([198.145.29.99]:33924 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726963AbfLSXa5 (ORCPT ); Thu, 19 Dec 2019 18:30:57 -0500 Received: from localhost (unknown [104.132.0.81]) (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 D7BAC24676; Thu, 19 Dec 2019 23:30:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576798256; bh=S5VBe2V6XP9JXlwOSx/7XHsQVvqLUe9FX070QiGd6qk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=jouYPEszKYtzl/CocDFcQQYTx62Jl0JUpge2h6STkcmp2WiwygnpEuC9YmaHBhSZC bnW4VuvICgNarPIfvbd4jLyXqVOVigNx4/gjcWLCpOukr9aTNwwCt70ztR5wUpt8/7 vT3pohVtwoZZQJvAiAi2CmH2nyK4j6F+Ea0WNNoI= Date: Thu, 19 Dec 2019 15:30:56 -0800 From: Jaegeuk Kim To: Bart Van Assche Cc: axboe@kernel.dk, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Subject: Re: kernel BUG at fs/buffer.c:LINE! Message-ID: <20191219233056.GA81515@jaegeuk-macbookpro.roam.corp.google.com> References: <0000000000009716290599fcd496@google.com> <31033055-c245-4eda-2814-3fd8b0d59cb9@acm.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <31033055-c245-4eda-2814-3fd8b0d59cb9@acm.org> User-Agent: Mutt/1.8.2 (2017-04-18) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/18, Bart Van Assche wrote: > On 2019-12-18 08:21, syzbot wrote: > > syzbot has bisected this bug to: > > > > commit 5db470e229e22b7eda6e23b5566e532c96fb5bc3 > > Author: Jaegeuk Kim > > Date:   Thu Jan 10 03:17:14 2019 +0000 > > > >     loop: drop caches if offset or block_size are changed > > > > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13f3ca8ee00000 > > start commit:   2187f215 Merge tag 'for-5.5-rc2-tag' of > > git://git.kernel.o.. > > git tree:       upstream > > final crash:    https://syzkaller.appspot.com/x/report.txt?x=100bca8ee00000 > > console output: https://syzkaller.appspot.com/x/log.txt?x=17f3ca8ee00000 > > kernel config:  https://syzkaller.appspot.com/x/.config?x=dcf10bf83926432a > > dashboard link: > > https://syzkaller.appspot.com/bug?extid=cfed5b56649bddf80d6e > > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1171ba8ee00000 > > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=107440aee00000 > > Hi Jaegeuk, > > Since syzbot has identified a reproducer I think that it's easy to test > whether your new patch fixes what syzbot discovered. Have you already > had the chance to test this? > I can't reproduce it with C reproducer. Hmmm... > Thanks, > > Bart.