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=-7.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 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 5BA01C433DF for ; Tue, 30 Jun 2020 06:11:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E63F20768 for ; Tue, 30 Jun 2020 06:11:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729888AbgF3GLv (ORCPT ); Tue, 30 Jun 2020 02:11:51 -0400 Received: from mga14.intel.com ([192.55.52.115]:56664 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725845AbgF3GLv (ORCPT ); Tue, 30 Jun 2020 02:11:51 -0400 IronPort-SDR: SWeiPHPHTaUUvP2lGpElwJJaB+GLorP+UeZTj67Rq2nYmsn0Un4mchnI0DbwWrB06CFVqDkJ+l o40xmWn/iLJA== X-IronPort-AV: E=McAfee;i="6000,8403,9666"; a="145228536" X-IronPort-AV: E=Sophos;i="5.75,296,1589266800"; d="scan'208";a="145228536" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Jun 2020 23:11:50 -0700 IronPort-SDR: WHE0t9yzwpQ0xsCGPsCSh2IpbpMzO83OTzGpFF2gffqQMYkSgRBW7p3bEYpUK5mE+OUzVt0xek mSi74pFIOZSQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,296,1589266800"; d="scan'208";a="386605000" Received: from sjchrist-coffee.jf.intel.com (HELO linux.intel.com) ([10.54.74.152]) by fmsmga001.fm.intel.com with ESMTP; 29 Jun 2020 23:11:49 -0700 Date: Mon, 29 Jun 2020 23:11:49 -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, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, vkuznets@redhat.com, wanpengli@tencent.com, x86@kernel.org Subject: Re: KASAN: null-ptr-deref Read in kvm_arch_check_processor_compat Message-ID: <20200630061149.GT12312@linux.intel.com> References: <000000000000077a6505a8bf57b2@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000077a6505a8bf57b2@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 Tue, Jun 23, 2020 at 05:17:15AM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=135e7235100000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d195fe572fb15312 > dashboard link: https://syzkaller.appspot.com/bug?extid=a99874f5323ce6088e53 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14d001be100000 #syz dup: general protection fault in syscall_return_slowpath