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=-7.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_PASS,USER_AGENT_MUTT 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 C798CC43381 for ; Fri, 22 Feb 2019 22:20:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 92B4C20675 for ; Fri, 22 Feb 2019 22:20:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="Paq2VwFU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726863AbfBVWUu (ORCPT ); Fri, 22 Feb 2019 17:20:50 -0500 Received: from mail.skyhub.de ([5.9.137.197]:39528 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725900AbfBVWUu (ORCPT ); Fri, 22 Feb 2019 17:20:50 -0500 Received: from zn.tnic (p200300EC2BCB39004460C94D34A9E8FA.dip0.t-ipconnect.de [IPv6:2003:ec:2bcb:3900:4460:c94d:34a9:e8fa]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id AF60D1EC0324; Fri, 22 Feb 2019 23:20:48 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1550874048; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=AlK/kL4/y+YHfuL3kGdAvpR3bkY8SHc/ISKko6tneDE=; b=Paq2VwFUMeNU3/iTOnTiT76qIiLfs4kPAL5FbQR8b6Qy6+MZRd/0Oe83WEl6FvGd7kVTso 4NH/xsVdcAS4j/0NRncYVsWTvRsUuD+TTx/vHRLh4StpNMxSOlX5UPCG30co5FCUeS+fjB emd3o4/E2PuFnLeW0z5rhL0wEq+mq/g= Date: Fri, 22 Feb 2019 23:20:36 +0100 From: Borislav Petkov To: syzbot Cc: douly.fnst@cn.fujitsu.com, hpa@zytor.com, konrad.wilk@oracle.com, len.brown@intel.com, linux-kernel@vger.kernel.org, mingo@redhat.com, puwen@hygon.cn, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, wang.yi59@zte.com.cn, x86@kernel.org Subject: Re: WARNING in rcu_check_gp_start_stall Message-ID: <20190222222036.GC30766@zn.tnic> References: <0000000000007da94e05827ea99a@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <0000000000007da94e05827ea99a@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 22, 2019 at 09:10:04AM -0800, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 8a61716ff2ab Merge tag 'ceph-for-5.0-rc8' of git://github... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1531dd3f400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=7132344728e7ec3f > dashboard link: https://syzkaller.appspot.com/bug?extid=111bc509cd9740d7e4aa > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d4966cc00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10c492d0c00000 So I ran this for more than an hour in a guest here with the above .config but nothing happened. The compiler I used is 8.2, dunno of that makes the difference or I'm missing something else... -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.