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=-7.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 1E8C3C43461 for ; Fri, 11 Sep 2020 20:03:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C8C4421D79 for ; Fri, 11 Sep 2020 20:03:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="bi5YLKmL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725844AbgIKUDl (ORCPT ); Fri, 11 Sep 2020 16:03:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725796AbgIKUDh (ORCPT ); Fri, 11 Sep 2020 16:03:37 -0400 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B96F8C061757 for ; Fri, 11 Sep 2020 13:03:37 -0700 (PDT) Received: by mail-pl1-x634.google.com with SMTP id m15so1376036pls.8 for ; Fri, 11 Sep 2020 13:03:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=frP8Q+XX3vatIolvDa1CfpmKMR9bYV+BQ0pT6Q4S34s=; b=bi5YLKmLyb3PdnbKs+BioUD4eTOKUvTFmSH93jPwe8WGn/jZKERBN77kVgZD27Y1D1 OXmlzXSSgUy+Gu5dAS1LgPWA+r4B/SCN/9UDEhfrsoxyqrCF1WcsvQ+OOMJvNihbG6zq BywqpY7yUGXofRN0q8UJ5B1ZLvTp5rFGos4IBwJyjK/U5RXSamPyYts3Wx1rqrzupWLT n+0dPIeb9ebBU0QcXCSNQYdzM1Kj58yLcfq0xMuwUm5tsBIPtUiW5VhVT9Ri62fpQiIN QpSHxjyLw20ppjDLbYSI4PYz8l5rymJm1S3cdhHyycrD1Wddw0pTDbiVH4bJbBjRHHvK Y48A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=frP8Q+XX3vatIolvDa1CfpmKMR9bYV+BQ0pT6Q4S34s=; b=VB9nH0YBE14Ha8l4fsTva0/3lnn2Cy9ntDfxMSgx2Fq9HNCF/KCRDytXz6gJ9GU60C m4mR70YU0aReb0hqog0vqQ6jdNtIi7hxf9f527EWEVchE1RRGufi4rUyck/t9xdZzgOj vZm1gJIvMl1giQXZOPu1TVuhmUMad2gk45DAXNwfksoQZfqAXKdyVIX288Q0gvvEQKor AsdAOhcKntoBzJ8BYp+4mC+5nWUwp1i/cYTOlReJjaIkev50Xr/9LjV2HiU4wP6YS3Ox IfG+osNjucUABjPEGTqdhKo655GVFWKyBTxI3gFk5u/dSqV9Ql8A8kXsSsiSGtXuM/5y sqMg== X-Gm-Message-State: AOAM532MUYxkzgEJpDiuIZdwzbNNyE22VCzPEteq3GU06cU/elq4arga VciS++vrQBJMRclFZNfjy9lUPw== X-Google-Smtp-Source: ABdhPJzP5JEZgAXjbay1DV3k010EzssCEgYlUoidnF/pMQkAiKmIaiX0cBIMnT3lDCJwc9PC5HAi7A== X-Received: by 2002:a17:902:465:b029:d0:89f1:9e2a with SMTP id 92-20020a1709020465b02900d089f19e2amr3853867ple.6.1599854615696; Fri, 11 Sep 2020 13:03:35 -0700 (PDT) Received: from [192.168.1.182] ([66.219.217.173]) by smtp.gmail.com with ESMTPSA id h12sm3083153pfo.68.2020.09.11.13.03.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Sep 2020 13:03:35 -0700 (PDT) Subject: Re: INFO: rcu detected stall in ext4_file_write_iter To: syzbot , acme@kernel.org, adilger.kernel@dilger.ca, 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 References: <00000000000029b48f05af0ec14f@google.com> From: Jens Axboe Message-ID: <32e8b6b0-fa68-42ac-f216-4bc2534bbfd6@kernel.dk> Date: Fri, 11 Sep 2020 14:03:33 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <00000000000029b48f05af0ec14f@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org #syz fix: block: allow for_each_bvec to support zero len bvec -- Jens Axboe