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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 11997C433FE for ; Fri, 4 Dec 2020 18:35:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CF21B22582 for ; Fri, 4 Dec 2020 18:35:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387477AbgLDSfz (ORCPT ); Fri, 4 Dec 2020 13:35:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726173AbgLDSfz (ORCPT ); Fri, 4 Dec 2020 13:35:55 -0500 Received: from mail-ed1-x529.google.com (mail-ed1-x529.google.com [IPv6:2a00:1450:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 25B77C061A52 for ; Fri, 4 Dec 2020 10:35:15 -0800 (PST) Received: by mail-ed1-x529.google.com with SMTP id b2so6848527edm.3 for ; Fri, 04 Dec 2020 10:35:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:from:date:message-id:subject:to:cc; bh=VazwCTbw4qFEcnDS99kE7+UPTpKgFLvwXrTcJ/OGLV8=; b=UoAtycuWbYXPQuHZa93zSkhDkJSIw0b5/ox+c+olIK8DcmAbppcTQ0S5nqiX68rqak O0OcRXvbaYs59/0lhZyyDXuBE89LpLU/4sCiBqYoY+7kZml0b8FecNEzYnsNUW08Ihz5 QF7SSKQPyyDDQa2ClfTAFtqizjUB+y8xrZebWbkw7H4Qp0JbSS6Bojpr/Kkqn2+Oksnw wT3LhcfoTMGVZj4tJFFM5mxJMYg2KBifKrCXcs7TzgB+i0DrF+DvPoqZuF/7IlEChaWv 6gSm3TUC/frYOd6VZB2UEePpomfz08LS4mRk9rLZ8P3hSyX0ElAYgJiZ6EcXcffOOCH/ GBxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=VazwCTbw4qFEcnDS99kE7+UPTpKgFLvwXrTcJ/OGLV8=; b=b3YcDEPHyrVUSj6T8tJBtqR9vAmDDzJ5+yNR2mPgr4iSu5r3XYAjeSMNRVsYHPhKxM oayxrsaJWAhIJeGMScsftstE77WB613c0lITQgGYXmCFCI/91qbRjAVv9uthvS70qMXe 0TkvQ7NkL9r5bx4ImzEA0FuZwwQREbQyT4jsRr8xF60trokpitPdy7oNy4qUJxg0rRay i5gOoTBTptvovuXd1IYwxDDZUmK3uKX3ThMZAHx5kb94u3W7BxTgo4eriN6pmd2ozZ6T CzZ9LBX/vyJ/MFaipnrp26GsPuISLusuyC6W7Vitn7wXYpyjpzyUOWcVX/lihL3uA9Mj R6cg== X-Gm-Message-State: AOAM530wzwIL5z2qPOxjYwzLMRm3wCDAjQIoUOHqXt86wc8+/KdlybsP d+VsFL+LKnL2WkJeyXUxbQnwOGzBkqOnOVfax122ng== X-Google-Smtp-Source: ABdhPJySBMs5wep5prKn4dGE0xz5+ByoMr95Z/1QhLJVmuU6vp5fZu61EN8FWgCSAJCp3cpH5tedG2S4/91FYDuyvnU= X-Received: by 2002:aa7:d74d:: with SMTP id a13mr5352244eds.78.1607106913506; Fri, 04 Dec 2020 10:35:13 -0800 (PST) MIME-Version: 1.0 From: Naresh Kamboju Date: Sat, 5 Dec 2020 00:05:02 +0530 Message-ID: Subject: BUG: KCSAN: data-race in __rpc_do_wake_up_task_on_wq / xprt_request_transmit To: kasan-dev , open list , Netdev , linux-nfs@vger.kernel.org, lkft-triage@lists.linaro.org, rcu@vger.kernel.org Cc: Jakub Kicinski , "David S. Miller" , chuck.lever@oracle.com, bfields@fieldses.org, anna.schumaker@netapp.com, trond.myklebust@hammerspace.com, "Paul E. McKenney" , Marco Elver , Peter Zijlstra , Ingo Molnar Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org LKFT started testing KCSAN enabled kernel from the linux next tree. Here we have found BUG: KCSAN: data-race in __rpc_do_wake_up_task_on_wq / xprt_request_transmit This report is from an x86_64 machine clang-11 linux next 20201201. Since we are running for the first time we do not call this regression. [ 17.316725] BUG: KCSAN: data-race in __rpc_do_wake_up_task_on_wq / xprt_request_transmit [ 17.324821] [ 17.326322] write to 0xffff90a801de6a9c of 2 bytes by task 142 on cpu 1: [ 17.333022] __rpc_do_wake_up_task_on_wq+0x295/0x350 [ 17.337987] rpc_wake_up_queued_task+0x99/0xc0 [ 17.342432] xprt_complete_rqst+0xef/0x100 [ 17.346533] xs_read_stream+0x9c6/0xc40 [ 17.350370] xs_stream_data_receive+0x60/0x130 [ 17.354819] xs_stream_data_receive_workfn+0x5c/0x90 [ 17.359784] process_one_work+0x4a6/0x830 [ 17.363795] worker_thread+0x5f7/0xaa0 [ 17.367548] kthread+0x20b/0x220 [ 17.370780] ret_from_fork+0x22/0x30 [ 17.374359] [ 17.375858] read to 0xffff90a801de6a9c of 2 bytes by task 249 on cpu 3: [ 17.382473] xprt_request_transmit+0x389/0x7a0 [ 17.386919] xprt_transmit+0xfe/0x250 [ 17.390583] call_transmit+0x10d/0x120 [ 17.394337] __rpc_execute+0x12d/0x700 [ 17.398089] rpc_async_schedule+0x59/0x90 [ 17.402100] process_one_work+0x4a6/0x830 [ 17.406114] worker_thread+0x5f7/0xaa0 [ 17.409868] kthread+0x20b/0x220 [ 17.413099] ret_from_fork+0x22/0x30 [ 17.416675] [ 17.418167] Reported by Kernel Concurrency Sanitizer on: [ 17.423475] CPU: 3 PID: 249 Comm: kworker/u8:1 Not tainted 5.10.0-rc6-next-20201201 #2 [ 17.431385] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.2 05/23/2018 [ 17.438778] Workqueue: rpciod rpc_async_schedule metadata: git_repo: https://gitlab.com/aroxell/lkft-linux-next target_arch: x86 toolchain: clang-11 git_describe: next-20201201 download_url: https://builds.tuxbuild.com/1l8eiWgGMi6W4aDobjAAlOleFVl/ Full test log link, https://lkft.validation.linaro.org/scheduler/job/2002643#L1005 -- Linaro LKFT https://lkft.linaro.org