From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f199.google.com (mail-qt0-f199.google.com [209.85.216.199]) by kanga.kvack.org (Postfix) with ESMTP id 91A3F6B0069 for ; Sat, 30 Sep 2017 15:20:28 -0400 (EDT) Received: by mail-qt0-f199.google.com with SMTP id 53so1388382qtz.21 for ; Sat, 30 Sep 2017 12:20:28 -0700 (PDT) Received: from outprodmail01.cc.columbia.edu (outprodmail01.cc.columbia.edu. [128.59.72.39]) by mx.google.com with ESMTPS id t3si5483066qtd.285.2017.09.30.12.20.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 30 Sep 2017 12:20:27 -0700 (PDT) Received: from hazelnut (hazelnut.cc.columbia.edu [128.59.213.250]) by outprodmail01.cc.columbia.edu (8.14.4/8.14.4) with ESMTP id v8UJK87U011404 for ; Sat, 30 Sep 2017 15:20:27 -0400 Received: from hazelnut (localhost.localdomain [127.0.0.1]) by hazelnut (Postfix) with ESMTP id 549C27E for ; Sat, 30 Sep 2017 15:20:27 -0400 (EDT) Received: from sendprodmail03.cc.columbia.edu (sendprodmail03.cc.columbia.edu [128.59.72.15]) by hazelnut (Postfix) with ESMTP id 3AC337E for ; Sat, 30 Sep 2017 15:20:27 -0400 (EDT) Received: from mail-wr0-f197.google.com (mail-wr0-f197.google.com [209.85.128.197]) by sendprodmail03.cc.columbia.edu (8.14.4/8.14.4) with ESMTP id v8UJKQoo041796 (version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=NOT) for ; Sat, 30 Sep 2017 15:20:27 -0400 Received: by mail-wr0-f197.google.com with SMTP id a43so2103077wrc.2 for ; Sat, 30 Sep 2017 12:20:26 -0700 (PDT) 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 Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org List-ID: To: LKML , reiserfs-devel@vger.kernel.org, linux-mm@kvack.org Cc: Andrew Zhu Aday , syzkaller 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org