Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752068AbdGIB3Y (ORCPT ); Sat, 8 Jul 2017 21:29:24 -0400 Received: from mail-pg0-f43.google.com ([74.125.83.43]:35124 "EHLO mail-pg0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751654AbdGIB3X (ORCPT ); Sat, 8 Jul 2017 21:29:23 -0400 Subject: Re: block: hung task writing to device To: "Levin, Alexander (Sasha Levin)" , "linux-block@vger.kernel.org" , "linux-kernel@vger.kernel.org" References: <20170708190730.avwa2urwjuvohpgg@sasha-lappy> From: Jens Axboe Message-ID: <720248fc-22fa-1fd3-08a4-e582adb38037@kernel.dk> Date: Sat, 8 Jul 2017 19:29:20 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <20170708190730.avwa2urwjuvohpgg@sasha-lappy> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 409 Lines: 13 On 07/08/2017 01:06 PM, Levin, Alexander (Sasha Levin) wrote: > Hi all, > > syzkaller seems to be hitting a lockup with the reproducer below: Thanks for the reproducer, but this is missing a lot of detail that we need to debug this issue. Is this a regression since 4.12? What storage device is this? Is the device using an IO scheduler? dmesg after boot and .config would be helpful, too. -- Jens Axboe