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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63721C433EF for ; Tue, 22 Feb 2022 18:23:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234957AbiBVSYO (ORCPT ); Tue, 22 Feb 2022 13:24:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45332 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230325AbiBVSYL (ORCPT ); Tue, 22 Feb 2022 13:24:11 -0500 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 96568EAC8C; Tue, 22 Feb 2022 10:23:45 -0800 (PST) Received: by mail-pj1-x1034.google.com with SMTP id q8-20020a17090a178800b001bc299b8de1so278862pja.1; Tue, 22 Feb 2022 10:23:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=XRY9BTtFDMjGt0LGbkNbt6s2IHGP2Dl3/GtZArqDt6M=; b=k4TDZhxO4zLnuGpfptc8tcXjeITKastU4t7LEphduxxMVQfj0PMC26Gzd50CTdJmK9 Hk75f7bRkkezokkuF3CPaFr94vo0zuEVtktH/VPQCDDwH4b41nUn1OhcAhnVMOSuLjdD 44ewS/IApkmNBq5DjQfE9aC7COY/oCs5EsqzYtjs495XG94VueQzaqp+F5Y6aejdcC+T cCyo12yrjvvi8PnV3y6S/3xM4zI9JwotFpF2Hifl9ddUktBezeqpxRDfbsPW8kiHnxQG /MSIAOECD7C4YXWqMCKanL2EcvGUxSapnk0NX2Vo3HNddunUS30T0vxEbXXVuMQ+Tesc hkAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=XRY9BTtFDMjGt0LGbkNbt6s2IHGP2Dl3/GtZArqDt6M=; b=xO9Rw3ILbzGXF/l1g/WPcNqwGz+H15hoslkVOorJWmqN5b4ZCaNYG5ggW7GouTGcG0 divHqPssRhqxePE+yeqQZ0OQnDmPEkOwZl/V5o6KSeC2FPmQ0j9MpxJ/4WGylKx9rXXE eE0yybqMSgMWy4LZLm0G2mjFwOhAiYvYYMVtF533tT4Xt95iADxgelgOZnkc8e0q7OFq XNUgYg2rgha63jI4/yBzNyRKQpf3EZfa8BtFxkspQ82R3POlia+SEgq4i5goYk+XufGJ nvk8NjITjnD0rBWX4L7WNGZzZhZZmr4p7L12ufyvJ1+Gq/tAUAHq5gID3Obz4SLAAuhi VKXA== X-Gm-Message-State: AOAM5326JiDs+n36GFmiVAa0cy7Za2ylN6aB2o1/PH2ZQrKYbXUuUI1i Wf9J+AqmxKaBOM15MsH7ZtA= X-Google-Smtp-Source: ABdhPJy4GwU+2FBSIX7szCtTBeuszPT/l7F25CNLzTYhUHqqCTxKB2s+Z1VguKa7RfZz2aZ9wWPb9w== X-Received: by 2002:a17:902:bd85:b0:14d:c29b:d534 with SMTP id q5-20020a170902bd8500b0014dc29bd534mr24068006pls.99.1645554225037; Tue, 22 Feb 2022 10:23:45 -0800 (PST) Received: from localhost (2603-800c-1a02-1bae-e24f-43ff-fee6-449f.res6.spectrum.com. [2603:800c:1a02:1bae:e24f:43ff:fee6:449f]) by smtp.gmail.com with ESMTPSA id n13sm163708pjq.13.2022.02.22.10.23.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 22 Feb 2022 10:23:44 -0800 (PST) Sender: Tejun Heo Date: Tue, 22 Feb 2022 08:23:43 -1000 From: Tejun Heo To: Waiman Long Cc: syzbot , cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, lizefan.x@bytedance.com, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] WARNING in cpuset_write_resmask Message-ID: References: <000000000000264b2a05d44bca80@google.com> <0000000000008f71e305d89070bb@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 22, 2022 at 01:22:13PM -0500, Waiman Long wrote: > My preliminary analysis is that the warning may be caused by my commit > 1f1562fcd04a ("cgroup/cpuset: Don't let child cpusets restrict parent in > default hierarchy") since the merge branch e5313968c41b is missing the fix > commit d068eebbd482 ("cgroup/cpuset: Make child cpusets restrict parents on > v1 hierarchy"). I believe the problem should be gone once the merge branch > is updated to a later upstream baseline. Fantastic. Thank you so much for taking a look. -- tejun