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 8BD2EC433E4 for ; Sat, 15 Aug 2020 21:59:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62C482313A for ; Sat, 15 Aug 2020 21:59:49 +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="N7LAbLrR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729602AbgHOV7r (ORCPT ); Sat, 15 Aug 2020 17:59:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45660 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728874AbgHOVvi (ORCPT ); Sat, 15 Aug 2020 17:51:38 -0400 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6B01C0F26F5 for ; Sat, 15 Aug 2020 11:15:01 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id u128so6106951pfb.6 for ; Sat, 15 Aug 2020 11:15:01 -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=BIuH6kISmbFa5kGRXf8C1zMlDZ6CK7mUtowqlOF0/dI=; b=N7LAbLrRiARO/ku0BNslWmbNZ5KMCXLYS4qzRJQeD3ePz5Yc0oZPSKTy+Q+tKlLaSZ vw4sOnwZUbHIwBkpaULk8Dqk1m0Ks89+CTMi2qyHyNAhT49JzM0/RZm4qt0hZ/wedgnT nca35p5YbcomCaOpAzEKL0DcuitU3yNF+7APgnu2ircedVIIIkJb3bDwhLaBmRHPIcvj p4Gzixsux1Po9Z+nJQoK/7ZRuqxIibSsvwuMfnEeEiYNN118g0/aECXWk0JIf8Zqmitp R4cMpAJMWrzNAoJt+US7GHgi+0ITpXxHm49DrtT77cwixLU8EFf1Q6pad9Pfenz+XvZ1 sOaw== 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=BIuH6kISmbFa5kGRXf8C1zMlDZ6CK7mUtowqlOF0/dI=; b=pwKLozHWDIq+9qgnB8rHK2hf4EADRKNZCxGVjJ1sWp59VpG9QtvFbhfcdOy6Sat+rD MyMXkg/eQ0JjCyDk/0F/9YpNI1008SS17Daf0iThh5ETTa71xXD5YQ3qXkR7DgBz5C+G pwmHlAGOVVayQCpcvVktmcY+nu6J9awNaZSdqquFt1MvHxXc/pDfaiwK+aibqkLxta3u aCs3mOv/hCA7fpK3iVxiLm+WA9G5lZbFK/mDkMr0Ie4EP3wb3tvFZX9TLfaAgZgQYuxc FZahxvJrgj5iYHy6c04AN91drw80SgVs9DLRB3oU0uXCA/jRK2b+VaPr+WU7tste9/b3 PJ6w== X-Gm-Message-State: AOAM532j4pMJvtZmjftDfHXveZu0Vt7EyMbkTL0ukMeqwh9XC9Klg7JJ +k14voNz7+InYMDKnN4r0D+yeQ== X-Google-Smtp-Source: ABdhPJyfy8cQiabf33POMoUVdvZFoEvwy1OBJwtbtdWdmCXbYJDDDjojpV/LcyrdhWnFkCXCxmfsvQ== X-Received: by 2002:a63:143:: with SMTP id 64mr5167393pgb.343.1597515300385; Sat, 15 Aug 2020 11:15:00 -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 j94sm11734141pje.44.2020.08.15.11.14.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 15 Aug 2020 11:14:59 -0700 (PDT) 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> From: Jens Axboe Message-ID: Date: Sat, 15 Aug 2020 11:14:58 -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 dupe general protection fault in io_poll_double_wake -- Jens Axboe