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=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 7CD97C433E0 for ; Sat, 25 Jul 2020 05:11:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 588B4206F6 for ; Sat, 25 Jul 2020 05:11:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726837AbgGYFLF (ORCPT ); Sat, 25 Jul 2020 01:11:05 -0400 Received: from mail-il1-f200.google.com ([209.85.166.200]:37334 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726273AbgGYFLF (ORCPT ); Sat, 25 Jul 2020 01:11:05 -0400 Received: by mail-il1-f200.google.com with SMTP id q9so1132430ilc.4 for ; Fri, 24 Jul 2020 22:11:04 -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=OxvLZmqjPIgyfFJFD3jU0NCXtLqtMkM6RdMtuDq0MCs=; b=SqSirh+ib5iURU+TNKAFbJOTzK6aMdj9teV0WVRiNNAQ7fPbYiUv09IE6QThnbcFZ7 hLO30OA10j5MTzEu0i6KBZYXco9PkTuMW0m9peFH6vOn/CUjNsBSaybrznPaYOmEtgjN dfB75oRHgbVgol1NmZRJg5DkI+lec4oIm8i6Y3v/wPCjDJtYLLZIpRHiVxsbJ2nUm8XC Mpvnh1mCUfwI1e4SQgOotrSOzx+pQ/l134dAHhwEFukRfTrf90U1TE/447Ios8oTPTCn ZLXryTyFHva6HSwKD9BMR5+YysjBVtNiY1O7XgdLUHPWm6pRQaMm0SNfjjqdXzA+QBA8 cbUw== X-Gm-Message-State: AOAM5328WwQF3K+NBaZJq2zhrJqXvm+aY8P6F7MS4AJ6QObR/SPcnGSa fQ4ZkvUQtNEDf6rUenaw06plpKOgmOCCnhEO+ygA1dsD6AoL X-Google-Smtp-Source: ABdhPJz7r05qYNwD8iAc+QKC+Tc9C8Eqv0mYlaRsqfEyEpJszHU46Z43bkEBNCZQUn51WRKL3DEvQ3smKEI3RDnTLqC1oTSQ+4/l MIME-Version: 1.0 X-Received: by 2002:a92:c912:: with SMTP id t18mr10628820ilp.186.1595653864438; Fri, 24 Jul 2020 22:11:04 -0700 (PDT) Date: Fri, 24 Jul 2020 22:11:04 -0700 In-Reply-To: <000000000000402c5305ab0bd2a2@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c641a505ab3d1d48@google.com> Subject: Re: INFO: task hung in synchronize_rcu (3) From: syzbot To: akpm@linux-foundation.org, davem@davemloft.net, jhs@mojatatu.com, jiri@resnulli.us, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@elte.hu, netdev@vger.kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, vinicius.gomes@intel.com, viro@zeniv.linux.org.uk, 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=149057ef100000 start commit: 4fa640dc Merge tag 'vfio-v5.8-rc7' of git://github.com/awi.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=169057ef100000 console output: https://syzkaller.appspot.com/x/log.txt?x=129057ef100000 kernel config: https://syzkaller.appspot.com/x/.config?x=f87a5e4232fdb267 dashboard link: https://syzkaller.appspot.com/bug?extid=0c6da80218456f1edc36 userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14e2a437100000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13af00e8900000 Reported-by: syzbot+0c6da80218456f1edc36@syzkaller.appspotmail.com Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler") For information about bisection process see: https://goo.gl/tpsmEJ#bisection