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=-6.1 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 85D22C433E2 for ; Sun, 30 Aug 2020 00:34:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5311120EDD for ; Sun, 30 Aug 2020 00:34:19 +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="v39DJi1E" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728568AbgH3AeR (ORCPT ); Sat, 29 Aug 2020 20:34:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728578AbgH3AeP (ORCPT ); Sat, 29 Aug 2020 20:34:15 -0400 Received: from mail-pg1-x535.google.com (mail-pg1-x535.google.com [IPv6:2607:f8b0:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B5B9C061575 for ; Sat, 29 Aug 2020 17:34:15 -0700 (PDT) Received: by mail-pg1-x535.google.com with SMTP id w186so2299218pgb.8 for ; Sat, 29 Aug 2020 17:34:15 -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=wRsdXQOoZs4yYt+Nf5Gy2Ldf3swM1iC++OefVgYyX0s=; b=v39DJi1E/yraMAnVunh60K3sIDnBghmBrGk8y6BbCaeJer1nZdesStPc7IKrUDiMix jOrokI7kcjuCKdDtgEE8A7AvLmw41vgtFIrZKBKluFy5EW7RspscQT488RbRqnBCRTVN 2eiNPQPUfffhonzWylRKNdFxE59QCYAu5u52Rs8ThvDRJmbEtkOhC33MrHWf64QMKuNf aLeeZYFzo9mzzFe1Kf1Hc2q7Dsy6EW+1eRc7mdH21fWk20yaa22q2tvqw5I1C2cN7Orc dTgXqxnggcZ2hgrovkX7cPw+Hz3Gm0PlbaK/AfG8SGV+OfCM5u2Do1GG7gIjwHzwyXEL DpeA== 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=wRsdXQOoZs4yYt+Nf5Gy2Ldf3swM1iC++OefVgYyX0s=; b=XVfhceZmrlZ+8f3SNSBhEjz614+AGziDB7SAJHj/7eXbWUQY4JjaaMNmeIBoOG5qAP qGqm+2ApcXNRfZ4+8F0786mGXJ8NNsz3L5AgiAIDFRKL+3YF+/nbwQvQARv3ts66HpsV q9fCirFKA4cRZUlUd3poAmOw3U26nrhKd5G6SC0hm/if1Fjus813snKwLBUoU/nibBgB A35fNdZC1D5iWMApUGsd3Gel3xr5TatTkb1iBVTZ/28wD4x+BJKuzjD0g7hVhW+GZL7i QWWVbzShiPMg1ddO63TUdR9UfJkKrjgVMrg4rWL0X6n+GDCxkYEvt9w8Bz5c7dS4Wgux vODA== X-Gm-Message-State: AOAM530vb7OnawhGG5cXHHqdt3hHz1T/jWolGDG2fGwvHKlS7xe0K0rG zKicbxWQbfma/XL0bRCZl80Vcg== X-Google-Smtp-Source: ABdhPJy5HsE91zNZgLLhC/SB0NnDxFkJRhtbqIjkRErPweW605gkmrMve/CveVLIfKZ2hdp3MwZu4A== X-Received: by 2002:a63:62c7:: with SMTP id w190mr3917110pgb.25.1598747654101; Sat, 29 Aug 2020 17:34:14 -0700 (PDT) Received: from [192.168.1.182] ([66.219.217.173]) by smtp.gmail.com with ESMTPSA id d8sm3460750pgt.19.2020.08.29.17.34.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 29 Aug 2020 17:34:13 -0700 (PDT) Subject: Re: possible deadlock in __lock_task_sighand To: syzbot , christian@brauner.io, ebiederm@xmission.com, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, liuzhiqiang26@huawei.com, oleg@redhat.com, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk References: <0000000000001bdf9705ae0d151b@google.com> From: Jens Axboe Message-ID: Date: Sat, 29 Aug 2020 18:34:11 -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: <0000000000001bdf9705ae0d151b@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This is already fixed, and it went upstream yesterday. #syz fix: io_uring: don't recurse on tsk->sighand->siglock with signalfd -- Jens Axboe