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=-3.7 required=3.0 tests=BAYES_00,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 3BEA3C388F7 for ; Sat, 31 Oct 2020 12:43:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 030002071A for ; Sat, 31 Oct 2020 12:43:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727380AbgJaMnG (ORCPT ); Sat, 31 Oct 2020 08:43:06 -0400 Received: from mail-il1-f198.google.com ([209.85.166.198]:41109 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726738AbgJaMnG (ORCPT ); Sat, 31 Oct 2020 08:43:06 -0400 Received: by mail-il1-f198.google.com with SMTP id s19so6627070ilb.8 for ; Sat, 31 Oct 2020 05:43:05 -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=PLbcQV3CQNzMNiONV/iIo/BtH9u9OMn0g6YFDavSo4Y=; b=MV9t0YjVnoPkhvPboSJKxmZe8zRENwuq5xv16DlM9L7QgDv3V0+d3BgYv8V6pSQDId YCFBNsi8NL+V5rwj0ULxfJwvq7cbUz9Jotl2Gs91yvuc8ZaK//u/bOAdy8CM/5VhPKqR HAeLAxd92oJaZTYmDI5GQWZFxjpeEGr8yTIM6mv8BXRlkTNP3hG6KvhAGsRJepOcL8bn 5MHLwG9sBFERITAJj2/tBlyfEr1KLT/2eZNkgR0HCltOiBVc73rkcTfngg6Qe5LypNWn 5yyt6YXIIpu1Xn+0FPkCwFOsRNvqe3wSfAVrasErejfr/cV2GYnIwhR+yKdfv6e4kNM9 V5kQ== X-Gm-Message-State: AOAM532iRL80KnBA7Wt/g1JtKx7CaWrFkfbah2YiNd3RPi8Zu0qG/a9w t3QYTAY4khwM/LPEjzkC8zG2RFitXZeB9KDklPO8KatA/dGq X-Google-Smtp-Source: ABdhPJwdSnQMnKqhQpqOWGJCnQ4jy4D5pDlHd07KEgNof9hw/wBkglwShyh1D3kPvEOpyeQ37a+d+sNXdO7wr2zoodVg81gSIN6U MIME-Version: 1.0 X-Received: by 2002:a02:a813:: with SMTP id f19mr5306316jaj.2.1604148185206; Sat, 31 Oct 2020 05:43:05 -0700 (PDT) Date: Sat, 31 Oct 2020 05:43:05 -0700 In-Reply-To: <00000000000061316205b0e750fc@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000bf140d05b2f6dae8@google.com> Subject: Re: INFO: task can't die in nbd_ioctl From: syzbot To: axboe@kernel.dk, hdanton@sina.com, josef@toxicpanda.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, mchristi@redhat.com, nbd@other.debian.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org syzbot has bisected this issue to: commit e9e006f5fcf2bab59149cb38a48a4817c1b538b4 Author: Mike Christie Date: Sun Aug 4 19:10:06 2019 +0000 nbd: fix max number of supported devs bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=154dc192500000 start commit: 4e78c578 Add linux-next specific files for 20201030 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=174dc192500000 console output: https://syzkaller.appspot.com/x/log.txt?x=134dc192500000 kernel config: https://syzkaller.appspot.com/x/.config?x=83318758268dc331 dashboard link: https://syzkaller.appspot.com/bug?extid=69a90a5e8f6b59086b2a syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e051a8500000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15bf75b8500000 Reported-by: syzbot+69a90a5e8f6b59086b2a@syzkaller.appspotmail.com Fixes: e9e006f5fcf2 ("nbd: fix max number of supported devs") For information about bisection process see: https://goo.gl/tpsmEJ#bisection