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[209.132.180.67]) by mx.google.com with ESMTP id i140si3721550oib.90.2019.12.19.11.17.52; Thu, 19 Dec 2019 11:18:04 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b="1w1k5/Ri"; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727188AbfLSTP6 (ORCPT + 99 others); Thu, 19 Dec 2019 14:15:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:39962 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726907AbfLSTP6 (ORCPT ); Thu, 19 Dec 2019 14:15:58 -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 911C9222C2; Thu, 19 Dec 2019 19:15:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576782957; bh=Ovk4S9XdooZpwds9kvkFV5q6xWu8VVrE8ivZlClNVEA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=1w1k5/RiIq/QdWAdD/kR8UvWFkV1peeJXQpVDE52VGTfgi4TtTeIjsbgc7aC7ekg1 zg0fvuYWg3+roF3GB77lC/xK29yKQEhizE3yGhuvdyMhn4C6va/TKx29blMGU/A9+l TL+d96/GHfII3P1hSP+V+PYw+lTYSrUyuGHG1Pnk= Date: Thu, 19 Dec 2019 11:15:56 -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: <20191219191556.GA68282@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? Hi Bart, Let me try to reproduce this. Thanks, > > Thanks, > > Bart.