Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751469AbdI3TUa (ORCPT ); Sat, 30 Sep 2017 15:20:30 -0400 Received: from outprodmail01.cc.columbia.edu ([128.59.72.39]:56177 "EHLO outprodmail01.cc.columbia.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751099AbdI3TU2 (ORCPT ); Sat, 30 Sep 2017 15:20:28 -0400 X-Google-Smtp-Source: AOwi7QAlAV5IeMJDORGTchggDlQfHyLRpBsT4QUT0RR+I2scqfvnrRJdkB3nZj3zPOqRZab2bdkWoYQ7EwHX9fo99Ew= MIME-Version: 1.0 In-Reply-To: References: From: Shankara Pailoor Date: Sat, 30 Sep 2017 15:20:25 -0400 Message-ID: Subject: Re: Hung Task Linux 4.13-rc7 Reiserfs To: LKML , reiserfs-devel@vger.kernel.org, linux-mm@kvack.org Cc: Andrew Zhu Aday , syzkaller Content-Type: text/plain; charset="UTF-8" X-No-Spam-Score: Local Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1041 Lines: 36 Hi, I have a reproducer program. It takes about 3-5 minutes to trigger the hang. The only calls are mmap, open, write, and readahead and the writes are fairly small (512 bytes). Reproducer Program: https://pastebin.com/cx1cgABc Report: https://pastebin.com/uGTAw45E Logs: https://pastebin.com/EaiE0JLf Kernel Configs: https://pastebin.com/i6URdADw Regards, Shankara On Fri, Sep 29, 2017 at 11:56 PM, Shankara Pailoor wrote: > Hi, > > I am fuzzing the kernel 4.13-rc7 with Syzkaller with Reiserfs. I am > getting the following crash: > > INFO: task kworker/0:3:1103 blocked for more than 120 seconds. > > > Here is the full stack trace. I noticed that there are a few tasks > holding a sbi->lock. Below are a report and a log of all the programs > executing at the time of the incident. > > > Report: https://pastebin.com/uGTAw45E > Logs: https://pastebin.com/EaiE0JLf > Kernel Configs: https://pastebin.com/i6URdADw > > I don't have a reproducer yet and any assistance would be appreciated. > > Regards, > Shankara