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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 E3000CA9EC4 for ; Wed, 30 Oct 2019 07:44:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BADFF20663 for ; Wed, 30 Oct 2019 07:44:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726239AbfJ3HoB (ORCPT ); Wed, 30 Oct 2019 03:44:01 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:38480 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725923AbfJ3HoB (ORCPT ); Wed, 30 Oct 2019 03:44:01 -0400 Received: by mail-il1-f197.google.com with SMTP id f6so1325719ilg.5 for ; Wed, 30 Oct 2019 00:44:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=dxnBOmtjfHc78Shusa2+2C/dwRTd+Y9TDOU+bAXew3I=; b=LY1LzS6KcuPMI1uFKUVM+7v04S7f1CmlDiQ++IxHEyYGgVQ7pz0Yzd8oZhSBtmyvqE Y0tKwtbq+VsOyfG79F2SXQc2Bf60UpZfegiSRVilJZsyra3zvxhxswcPnYc8d9s3svTr ftIU3FBluUJ7GFQtGSdLC1eYb0s3ARedTYrQ+Le9l4JxZM0nPWLPxQRJPuzfQ+Ofu+xt P3C+JvWVPSKDrSuyt7jiK0oj/3i4jiAo38Qxrx7gKnKnyhf/92PDrL80uIB9tzMB/S3F 9ZVndw+UufRmJ7Hq/0SI3kCOF4Uczf47D4lkRe5maVvyGdKkB0iymjEKR7ESYzKJAX6l Zy9A== X-Gm-Message-State: APjAAAXpKgj22jmU1U01ktanxHk+COPzXMzaYkSxTMDAejU868+sLIOP YkO4UmeHHgU2W6DqKYOVgQWQtRwSlznj6oceqnpS6xv+x6nF X-Google-Smtp-Source: APXvYqzGVHBXNanN7A1gB3Pu8U6dJQ1xC84jP6Pgwkt0UEP1XoERs3CsFZrP1t2i7TE5nit9eB6qSkADskBzJ+BxPwORRiMLm+9o MIME-Version: 1.0 X-Received: by 2002:a92:99ca:: with SMTP id t71mr16932987ilk.61.1572421440730; Wed, 30 Oct 2019 00:44:00 -0700 (PDT) Date: Wed, 30 Oct 2019 00:44:00 -0700 In-Reply-To: <000000000000c6fb2a05961a0dd8@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000069801e05961be5fb@google.com> Subject: Re: BUG: unable to handle kernel paging request in io_wq_cancel_all From: syzbot To: akpm@linux-foundation.org, axboe@kernel.dk, dan.j.williams@intel.com, dhowells@redhat.com, gregkh@linuxfoundation.org, hannes@cmpxchg.org, joel@joelfernandes.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mchehab+samsung@kernel.org, mingo@redhat.com, patrick.bellasi@arm.com, rgb@redhat.com, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk, yamada.masahiro@socionext.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this bug to: commit ef0524d3654628ead811f328af0a4a2953a8310f Author: Jens Axboe Date: Thu Oct 24 13:25:42 2019 +0000 io_uring: replace workqueue usage with io-wq bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16acf5d0e00000 start commit: c57cf383 Add linux-next specific files for 20191029 git tree: linux-next final crash: https://syzkaller.appspot.com/x/report.txt?x=15acf5d0e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=11acf5d0e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb86688f30db053d dashboard link: https://syzkaller.appspot.com/bug?extid=221cc24572a2fed23b6b syz repro: https://syzkaller.appspot.com/x/repro.syz?x=168671d4e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=140f4898e00000 Reported-by: syzbot+221cc24572a2fed23b6b@syzkaller.appspotmail.com Fixes: ef0524d36546 ("io_uring: replace workqueue usage with io-wq") For information about bisection process see: https://goo.gl/tpsmEJ#bisection