Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp5504592pxj; Wed, 26 May 2021 12:06:54 -0700 (PDT) X-Google-Smtp-Source: ABdhPJypxjLouN/07W3r+4z5P60uLfgL5bqR718g6+WaSc1myBrxiFpoxzc+itGgP6ZwtO4WM1t7 X-Received: by 2002:a17:906:77dc:: with SMTP id m28mr34644805ejn.23.1622056014259; Wed, 26 May 2021 12:06:54 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1622056014; cv=none; d=google.com; s=arc-20160816; b=VO4k6DUdGMQB0d2QkUU67eneOy6clFlWPmsmyGbD/8L5nbom/RvqUAhSdhfoTQDYlz wFLqYjuHqGg9RJs+j7euSkliOAUQMFiQQCkBT+WhPES0Dl2GYhnWsYfk/3MuOBhOY4xc 2e06noIA5ooQmAIEJcIoMa91U7nxEFyaNieuI+M1WvNvg64CESNzfX9ySf5pGBRgX4b3 YoR9EKbcpl+XpAE+2LlkOA7MDK0dnJPItSKnsf87zOIQCC7ThY27uEMQusfaZG+fWLU2 3YZXdH+hYDe0XbT0EYbVQR1ui8i0AXDRO2GVkzYuq814kMsTQWQgb+aLj8gbh9l21Gby uClg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:references:cc :to:from:subject:dkim-signature; bh=TeMQf0+FO4ym4hfoS0vMKgOKCQ0f25mg9GpSl0nXAx4=; b=jG7AGUAiZus8IZZWUrKrN/cHcW+hsT4AVGw6XkAuZ914C0muSp3/wqyYPlBv7W7Ots ldf9jyZcyWr3swqH57NQCdqoMRMKGWj1T/aY91TyZtHPavH3OyUJMumB0yzP4Jmj7fDM uqRUWJlrtjKf1hKlmPqzj5KGI0XGeJcrG9pBIIXcOL6RBviLfMy62QKpCaezHzTquJKs 1jJPBJDDWSXASMxoT7loH9l3Q/1KzmFZAcJFNiHQE8LGIUuM13z51v96T5CjNeZ8DtPB yXwbGG6zyMu205CKJxD/Eu69L4gwGkLTsV0uueqeoCY12Jjr5mKKrLSVt/S/WiouD91P CX4A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=NdfZIzmt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id b5si187086eju.507.2021.05.26.12.06.24; Wed, 26 May 2021 12:06:54 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=NdfZIzmt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234666AbhEZQen (ORCPT + 99 others); Wed, 26 May 2021 12:34:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33582 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232891AbhEZQen (ORCPT ); Wed, 26 May 2021 12:34:43 -0400 Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2187C061574; Wed, 26 May 2021 09:33:10 -0700 (PDT) Received: by mail-wm1-x331.google.com with SMTP id s5-20020a7bc0c50000b0290147d0c21c51so871157wmh.4; Wed, 26 May 2021 09:33:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:from:to:cc:references:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=TeMQf0+FO4ym4hfoS0vMKgOKCQ0f25mg9GpSl0nXAx4=; b=NdfZIzmtg8AV9+i2/ZJK84FGl8KxAq0sI1zLGz+4QEDHdH/oXgYZT++64Yd8rp3o+d VwUOfzwurhFS0+d1ch1f+ywU6E2R4RUXYRiiVHNc7VojKfFK2y3L1Du4YFQ5OwkxiRf+ 4pfyiBuVLY+iqWEJLFa5OHhCv6AaXqdOUsPtf9IMRasoSR5KIBu0wAW9zUe0a+6IjCq5 AV8o6OlOWYV/UHXWqZGtROmSMaGf3HReLO6788GyMaREGx3BOjU+UpqpjGIrTIU6pSUs FPinedH1n7Y2yCToiSO5qn2w5JryTquq14oSvc/fFY6JLhflG/dHotyQWzpLhAFe2rlm Ocmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:from:to:cc:references:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=TeMQf0+FO4ym4hfoS0vMKgOKCQ0f25mg9GpSl0nXAx4=; b=VzkAmoucHbigO8YnTw9auC5d3fd2vV9QQkSXwqixy/b0QJ+0icD5vBY4wTfzrK8+81 6KN0b7E+pf6RYGbEvIz7sPh47TZLOigrEiDHsYmIV2sUNaXsXUKNIUtqx5h0Q1/NAp6t ayo6jyoiKe3T/gD/49FTMvSjFge/AngfAVQw1yz/X2GZVWADPfPgigUlwTZSzOfdJUjs x1YC/5vjo4zRjCr1GNinMT/vY/GxjE+YLwKX+OSfdFB6/wysywx1TSHwbXEN4Ru0Qd0M OOw7rMIL7WO9L6LopCgMGOzisLv0JWxT1Q37ty0CmJ/VpWfoZ7u3h96YrN7zwFUw87HZ mzQQ== X-Gm-Message-State: AOAM533801VnEPpytjIrFxluMHm+q72aS4+/LlQlH/iW239UZim8wkQh Pli3nes31D+g+wbRnCQ+/Ps= X-Received: by 2002:a7b:c770:: with SMTP id x16mr3522670wmk.126.1622046789472; Wed, 26 May 2021 09:33:09 -0700 (PDT) Received: from [192.168.8.197] ([85.255.236.10]) by smtp.gmail.com with ESMTPSA id s2sm5661727wmc.21.2021.05.26.09.33.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 26 May 2021 09:33:09 -0700 (PDT) Subject: Re: [syzbot] KCSAN: data-race in __io_uring_cancel / io_uring_try_cancel_requests From: Pavel Begunkov To: Marco Elver , axboe@kernel.dk Cc: syzbot , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, dvyukov@google.com References: <000000000000fa9f7005c33d83b9@google.com> Message-ID: <0b33f17e-9105-aad0-5d32-c3ed54a00da4@gmail.com> Date: Wed, 26 May 2021 17:33:00 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/26/21 5:29 PM, Pavel Begunkov wrote: > On 5/26/21 4:52 PM, Marco Elver wrote: >> Due to some moving around of code, the patch lost the actual fix (using >> atomically read io_wq) -- so here it is again ... hopefully as intended. >> :-) > > "fortify" damn it... fwiw, it's a reference to my own commit that came after -rc -- Pavel Begunkov