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=-9.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 A943DC433E3 for ; Wed, 15 Jul 2020 05:43:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F2D22067D for ; Wed, 15 Jul 2020 05:43:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728609AbgGOFnG (ORCPT ); Wed, 15 Jul 2020 01:43:06 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:35119 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728542AbgGOFnF (ORCPT ); Wed, 15 Jul 2020 01:43:05 -0400 Received: by mail-io1-f72.google.com with SMTP id i204so735586ioa.2 for ; Tue, 14 Jul 2020 22:43:05 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=/z2x/BsnXueVROTB2+EfJc+boAw0TokYStszpq182V8=; b=PEHlC/4GVPCzAiw7O2X3fJ7DWjMOwNKaa6C/UF/F35S37N6eMaiFtGXzjrEz2BZnTR j4WhghfavqHxabzFpp1o8CD0L+IEKDK5kErRzPoAACt3h1bxoZ9MagW3AMQXeKhKkVMe qKnAhoTH5A6YX0WaDWyZ89wMsxzy5q5A0IR2bgK4Yy3e5ABw1jy8mFHrPOIWtMP5fopA oEQPghlsw29aR0kUyO6W7r6ofxL1xUME+M5BRzsLRilRUzrO6srptj2ebDdauCsGTwfh jCVaHvxUMPCNJTm+Sq0e8sbUzrc1XWKbSzReDdczEo/XSvoGlHDFp+P3miTgiV7gVFjM XbHw== X-Gm-Message-State: AOAM532+MPoRrrp/rFaqYLlaEYCNGpKOzov6PFiMnKz9586vTRNzHV2Z NfbTfagGG0YYO2Kw5ryuzwRYCdqzsdJcNbMjKntGj0HNB7T6 X-Google-Smtp-Source: ABdhPJwjK+YsDz9DCMtkcUKewccMP7gwa0bvnKpr7nngnJQGwjL5uJUGDmQoZeU6zE2L47JMOzdR8e3Cmdi/wnee0F6CBDeoyLKa MIME-Version: 1.0 X-Received: by 2002:a6b:691d:: with SMTP id e29mr8454664ioc.159.1594791784843; Tue, 14 Jul 2020 22:43:04 -0700 (PDT) Date: Tue, 14 Jul 2020 22:43:04 -0700 In-Reply-To: <000000000000080a5f05aa4691a8@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d38e6805aa746577@google.com> Subject: Re: BUG: soft lockup in smp_call_function From: syzbot To: bp@alien8.de, davem@davemloft.net, dvyukov@google.com, hpa@zytor.com, jhs@mojatatu.com, jiri@resnulli.us, keescook@chromium.org, linux-kernel@vger.kernel.org, luto@amacapital.net, luto@kernel.org, mingo@redhat.com, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, vinicius.gomes@intel.com, wad@chromium.org, x86@kernel.org, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 Author: Vinicius Costa Gomes Date: Sat Sep 29 00:59:43 2018 +0000 tc: Add support for configuring the taprio scheduler bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1196d06f100000 start commit: 4437dd6e Merge tag 'io_uring-5.8-2020-07-12' of git://git... git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=1396d06f100000 console output: https://syzkaller.appspot.com/x/log.txt?x=1596d06f100000 kernel config: https://syzkaller.appspot.com/x/.config?x=66ad203c2bb6d8b dashboard link: https://syzkaller.appspot.com/bug?extid=cce3691658bef1b12ac9 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11a160bf100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16d2bd77100000 Reported-by: syzbot+cce3691658bef1b12ac9@syzkaller.appspotmail.com Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler") For information about bisection process see: https://goo.gl/tpsmEJ#bisection