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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 E290DC4332E for ; Thu, 19 Mar 2020 14:49:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C586720782 for ; Thu, 19 Mar 2020 14:49:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727328AbgCSOtx (ORCPT ); Thu, 19 Mar 2020 10:49:53 -0400 Received: from mga18.intel.com ([134.134.136.126]:24948 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727103AbgCSOtx (ORCPT ); Thu, 19 Mar 2020 10:49:53 -0400 IronPort-SDR: KTx2BSn7pBK3mQ9ROjwYAm7vKHfYryLMLFrIDlhudIPjnloQ3QTR6VOWvfAFHmsOGLMPAyLxU9 /q9P8a2T0jSg== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Mar 2020 07:49:52 -0700 IronPort-SDR: wgWTFVi60EiTqDR+fxJqq1BmHs1em6B9aD+X8WwNqoqt3jG+HHnt9QkVnxnsFiSbOtpajhnVgE mTigOPv9qC4A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,572,1574150400"; d="scan'208";a="418364671" Received: from sjchrist-coffee.jf.intel.com (HELO linux.intel.com) ([10.54.74.202]) by orsmga005.jf.intel.com with ESMTP; 19 Mar 2020 07:49:52 -0700 Date: Thu, 19 Mar 2020 07:49:52 -0700 From: Sean Christopherson To: syzbot Cc: bp@alien8.de, hpa@zytor.com, jmattson@google.com, joro@8bytes.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, pbonzini@redhat.com, rkrcmar@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, vkuznets@redhat.com, wanpengli@tencent.com, x86@kernel.org Subject: Re: WARNING in vcpu_enter_guest Message-ID: <20200319144952.GB11305@linux.intel.com> References: <000000000000f965b8059877e5e6@google.com> <00000000000081861f05a132b9cd@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000000000081861f05a132b9cd@google.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Thu, Mar 19, 2020 at 03:35:16AM -0700, syzbot wrote: > syzbot has found a reproducer for the following crash on: > > HEAD commit: 5076190d mm: slub: be more careful about the double cmpxch.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=143ca61de00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=9f894bd92023de02 > dashboard link: https://syzkaller.appspot.com/bug?extid=00be5da1d75f1cc95f6b > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10bb4023e00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+00be5da1d75f1cc95f6b@syzkaller.appspotmail.com Reproduced with a little tweaking of the reproducer, debug in progress.