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 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 2DE78C433E2 for ; Fri, 11 Sep 2020 19:33:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0307E22209 for ; Fri, 11 Sep 2020 19:33:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726059AbgIKTd0 (ORCPT ); Fri, 11 Sep 2020 15:33:26 -0400 Received: from mail-il1-f208.google.com ([209.85.166.208]:37778 "EHLO mail-il1-f208.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725794AbgIKTdJ (ORCPT ); Fri, 11 Sep 2020 15:33:09 -0400 Received: by mail-il1-f208.google.com with SMTP id z14so7913995ils.4 for ; Fri, 11 Sep 2020 12:33:09 -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=0yUAb84Y2NikNa3auoYNYurMSwqxLYd/elyzvfiKkx4=; b=QWztBMsIEQA806b1F12rXg6h85kmGpAX30HvG5jV1H+jzRSenDwltkY0b8iuBH82Tz BLVkACarUPkM1lyD2W8nVbCi33kVn2RG6tRvf6+EFyHFlz81qQxon4wBOZhpwCTXfxPu 08UN8wxr/1sXM3OXOplF75vS83aIZSNVoY7YAM3XX4lDC251/Myf3RpqhzrjIdFrWvi0 0vkDaeeqhST6n1ZzquhViYyay/obq/keBHUYzFW+/FKEcMI/ecqYlyVxTNJ4Wj5wftkJ 7qacfPUgnaomMfgcvO6C44CaU2cBLtPzMccvssYvN6eoqNFo8KnT3BYaQS6REWt5VPJ5 TW/A== X-Gm-Message-State: AOAM530HPz3dq5kq50GbHz/HQYbSa9rzy7FvJ9HfQKh4gT8Vq8Pvnppa c24MfEAdqTezoALwsoGEIcNgvDUS0QYdouMDviaVP7kc+Sqy X-Google-Smtp-Source: ABdhPJyfFyXUGfImL5tjN6eAjrxa1lhqm11mUkFnIN5rwrwxtfv/gkcEKJnHEcdMqRpYoKA2Er1FYi1oI3tYPf76pme46eT6XyY+ MIME-Version: 1.0 X-Received: by 2002:a02:9f95:: with SMTP id a21mr3364657jam.50.1599852788689; Fri, 11 Sep 2020 12:33:08 -0700 (PDT) Date: Fri, 11 Sep 2020 12:33:08 -0700 In-Reply-To: <0000000000009a01370582c6772a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000029b48f05af0ec14f@google.com> Subject: Re: INFO: rcu detected stall in ext4_file_write_iter From: syzbot To: acme@kernel.org, adilger.kernel@dilger.ca, axboe@kernel.dk, dvyukov@google.com, fweisbec@gmail.com, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, ming.lei@redhat.com, mingo@kernel.org, mingo@redhat.com, penguin-kernel@i-love.sakura.ne.jp, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot suspects this issue was fixed by commit: commit 7e24969022cbd61ddc586f14824fc205661bb124 Author: Ming Lei Date: Mon Aug 17 10:00:55 2020 +0000 block: allow for_each_bvec to support zero len bvec bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1120f201900000 start commit: 92ed3019 Linux 5.8-rc7 git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=84f076779e989e69 dashboard link: https://syzkaller.appspot.com/bug?extid=7d19c5fe6a3f1161abb7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170f7cbc900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16a25e38900000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: block: allow for_each_bvec to support zero len bvec For information about bisection process see: https://goo.gl/tpsmEJ#bisection