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=-5.5 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 0806FC433DF for ; Sat, 15 Aug 2020 22:07:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB15E20708 for ; Sat, 15 Aug 2020 22:07:15 +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="e6PWsULu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730007AbgHOWHP (ORCPT ); Sat, 15 Aug 2020 18:07:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728276AbgHOVuo (ORCPT ); Sat, 15 Aug 2020 17:50:44 -0400 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E25FCC0F26FA for ; Sat, 15 Aug 2020 11:15:46 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id 74so6086770pfx.13 for ; Sat, 15 Aug 2020 11:15:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=from:subject:to:references:message-id:date:user-agent:mime-version :in-reply-to:content-language:content-transfer-encoding; bh=cgr9lRuKidkQIN9VikhOAh92WJNaoQaxLNAuYBGK56A=; b=e6PWsULuK1ZSnLzAcLaCBxDm6omzMQsVIJecKyrN7HSU4hXEnzWV60RwOx7FNce0Hj Ke+ZSTpcDU3JIhDtJRiZvJgsp122dUidCpvjhkRKTwv4T2amwjdG2UIi79GZF9VbMCRc Ic8PK+2wuWD2Bm6eQZbWs8D3M+V9nhh2hzO1z95l3MlCIRKCGscsoer6Qj6nDTn2LmPA 4Zb19YxRviqttOYunp4fH/bLzZvrkhQVnFyHcwGDJTPLf2C0W7BZQ0DYeqM9vBfrf65i 5A8NFr8SWQ9gJwZpKTSRbtl/NV2ezk4rIYpB93OYN6gxUYxpSekq7y8hqke+WXPgT2WU YH1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:subject:to:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=cgr9lRuKidkQIN9VikhOAh92WJNaoQaxLNAuYBGK56A=; b=K7cInlD6tLY7dIYHBYocRtRO40uDYKqQFFFpM15IRqybLzvEhOMFXUzXtZwA+ZlcuY vzVplnTmvwi+F5gCeIIlN8Bl7rWeOwMkxDAap65M/IZRRxz17P5u7uKSiPmKVk3PquaE 7ZNcZQjC+h3X1ZKIB6J/lRYX7gRpa5IYXTebF93nKRo4T2HkW/HU0Qw4rneX/ioml5sn q1jIwQHtlhWQ93upxkOsaqRKDUpnS7YU1lQaqKTMsrHuROi9KY3MkkPw1Mw1r+p3DtRd to4MGbZCQYRtvMZC7faoCet/F58p7+/IcCHSpky5eE/Vp5vACnj8C1kawL0o5QX6LgRt d+4Q== X-Gm-Message-State: AOAM531bXpm6K+GbayhfUQ0KqJCsejTbM+vS2/RLb8RUpfroSn95VAlD WWlu0jybun2E9evQAF41WNsMQQ== X-Google-Smtp-Source: ABdhPJzM1CZhjXBL0TtrdKhbrHniS7YBWuX7Am0ORQZPsO3178OMkcj+cFPwslOf9e4QBeTzu5pGhQ== X-Received: by 2002:a62:8cd3:: with SMTP id m202mr5746565pfd.184.1597515346498; Sat, 15 Aug 2020 11:15:46 -0700 (PDT) Received: from ?IPv6:2605:e000:100e:8c61:6299:2df1:e468:6351? ([2605:e000:100e:8c61:6299:2df1:e468:6351]) by smtp.gmail.com with ESMTPSA id z77sm13633210pfc.199.2020.08.15.11.15.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 15 Aug 2020 11:15:45 -0700 (PDT) From: Jens Axboe Subject: Re: possible deadlock in io_poll_double_wake To: syzbot , io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk References: <000000000000923cee05acee6f61@google.com> Message-ID: Date: Sat, 15 Aug 2020 11:15:44 -0700 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: <000000000000923cee05acee6f61@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 #syz dup general protection fault in io_poll_double_wake -- Jens Axboe