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=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 D289CC4332D for ; Thu, 19 Mar 2020 07:13:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A2A3720724 for ; Thu, 19 Mar 2020 07:13:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="prPUHVlx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727201AbgCSHNs (ORCPT ); Thu, 19 Mar 2020 03:13:48 -0400 Received: from mail-qk1-f193.google.com ([209.85.222.193]:38497 "EHLO mail-qk1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727198AbgCSHNs (ORCPT ); Thu, 19 Mar 2020 03:13:48 -0400 Received: by mail-qk1-f193.google.com with SMTP id h14so1679745qke.5 for ; Thu, 19 Mar 2020 00:13:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=rH9XkrtMe7HI6VnpexBxHYP1li78F1+6ZSnrUVBDTCw=; b=prPUHVlxVd+bHnSt25R24pQe+7i7O9R1n3DEuULFVAUvo3IiUm9SO3mMtIEaRPGkvz lKFp3mkHdQdETyKa5GlARoh4QXgZ+tKH8X2ph3Hb3vfbjQ2+qYluAggjgQRlLSsd52bT F6xky0J+wLpGQWN5BDv1nVOQM0RIska5/S0L3eeZtDnd19ABYyhiASRMtwy3c8MUDgdg MueSMeN4QycaC90Cs2AtPu8eP5Zj1GA+rOjdD+FDFsYeyLdGxrooicFD+2s/R7LK6p44 zb0L9GAp/knpAygSvvb9iA4E3xHqP8l52hMGSF/zPbcoj8c3wbqhkisuq1D9Yf61+fms za4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=rH9XkrtMe7HI6VnpexBxHYP1li78F1+6ZSnrUVBDTCw=; b=Yv1rxOEpVNp5Jp4xD5Op6fMdxKMAUUe7cNAy5EvAkGcX5ph43hqjXiZUoouaT1ZvjC lg39KNSsROoqvrf4xvNSws2C8KfMc8clLqfF+GKmbdUHWgTu1afQX/kQzY4yzvqM7ej/ 2JYtAstyeaKRkh9BP8m+nei+tDjAqlPpf6ukHKAGBPVvwgVuNIEWxebaXhDYY5DYISpi liMW5/BIoKhtZfQJQrijsEpo+P3QcmSPcKbwLFWT339QnS5h1Q1Y9vBMGYy4Pq98TMJZ q8Kl3f1VdAdd4gsOR50jGkNYLVKUnFnObYvD6SZQiVyx/jtOzdux9kwpGALZi3lSUV1S Gcsw== X-Gm-Message-State: ANhLgQ02QIPmcG9L6ZtYppfp8nZMT6aHH9CkxPngyMAjL4qc/m7IxudE yGu4WGgiW19gsNP91b6cRAB6VNghcvVUJsXblFa6vA== X-Google-Smtp-Source: ADFU+vvRD/fu9oNydL2plK4iDRAkvvrhZlF6/7O+wy46FW3Kp9+qbKsulg4yL1lxcZZPurOY/plBmaFmtqpvf/If4vA= X-Received: by 2002:a37:6115:: with SMTP id v21mr1538768qkb.43.1584602027025; Thu, 19 Mar 2020 00:13:47 -0700 (PDT) MIME-Version: 1.0 References: <000000000000ae2ab305a123f146@google.com> <20200318214109.GV3199@paulmck-ThinkPad-P72> In-Reply-To: <20200318214109.GV3199@paulmck-ThinkPad-P72> From: Dmitry Vyukov Date: Thu, 19 Mar 2020 08:13:35 +0100 Message-ID: Subject: Re: linux-next build error (8) To: "Paul E. McKenney" Cc: syzbot , Josh Triplett , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Joel Fernandes , rcu@vger.kernel.org, LKML , syzkaller-bugs Content-Type: text/plain; charset="UTF-8" Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org On Wed, Mar 18, 2020 at 10:41 PM Paul E. McKenney wrote: > > On Wed, Mar 18, 2020 at 09:54:07PM +0100, Dmitry Vyukov wrote: > > On Wed, Mar 18, 2020 at 5:57 PM syzbot > > wrote: > > > > > > Hello, > > > > > > syzbot found the following crash on: > > > > > > HEAD commit: 47780d78 Add linux-next specific files for 20200318 > > > git tree: linux-next > > > console output: https://syzkaller.appspot.com/x/log.txt?x=14228745e00000 > > > kernel config: https://syzkaller.appspot.com/x/.config?x=b68b7b89ad96c62a > > > dashboard link: https://syzkaller.appspot.com/bug?extid=792dec47d693ccdc05a0 > > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > > > > > Unfortunately, I don't have any reproducer for this crash yet. > > > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > > Reported-by: syzbot+792dec47d693ccdc05a0@syzkaller.appspotmail.com > > > > > > kernel/rcu/tasks.h:1070:37: error: 'rcu_tasks_rude' undeclared (first use in this function); did you mean 'rcu_tasks_qs'? > > > > +rcu maintainers > > The kbuild test robot beat you to it, and apologies for the hassle. > Fixed in -rcu on current "dev" branch. If the kernel dev process would only have a way to avoid dups from all test systems... Now we need to spend time and deal with it. What has fixed it?