Received: by 2002:a05:6902:102b:0:0:0:0 with SMTP id x11csp3327819ybt; Mon, 29 Jun 2020 23:13:13 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwIj869ZFQDb8fSQ6P8zGWPHiYQrZFsHRK7cjtUlesYkCz37qg10joII6vPROZtAmuYRNia X-Received: by 2002:a17:906:3a0d:: with SMTP id z13mr9592655eje.109.1593497593286; Mon, 29 Jun 2020 23:13:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1593497593; cv=none; d=google.com; s=arc-20160816; b=sBlJ8hJkm1PU39PchDVfx8Qi4XBzJM7ZLny//NV/ck8eqmhdOJjn88Ok+d+v678cKT ndyRAkyBk+NeAr5DQRzneRA7MaZMmVPrky72omwj/5Ejmz/oPD41eBo2FouWFA74qzzB PKzuZpz5J8rkg30CJEJkN0nwaUAn7ddRXbQRo+uWjHu5JG7KMzXTUgfvU49y7FTyE3Sf jGwBQ4LX/wh4H5xMuF6JkGgXy1klUfRQSor5fokwFHmJjUG7wZMbDRHHTs8vqiVOM6iq nTMEqtiDFcZhc+9wayn56hiAlwyBz6QJKLwom9dXWr25cfZPq1v+tLZcCn9vl6NLsofy sHvg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:ironport-sdr:ironport-sdr; bh=nC6BbiZygPFhd184J3sYrxp/FzXHdQ3yEP75D3DQ5+s=; b=gyzFvtlTfy2SvEFPDgQy8FFSBjyQ4hOv/MBIYEgNaY6i1fync7U0/8LN7/kCY9nWLQ 2Jcevjc4oV0rQuUYGRk0yXlsdJnlRz71lg2PPIuBci/1a3JPg4FW/N+veqFie/Bi63cE TL5TOSgZa/ysbX0rAoQHX8vY0bYmD3qMofifpJDenrN24LrtdV6YUb0nvCdYTolHEHud 1DEWEZhWhtbEGNB67vyoGpqlrmmRmnO/JV2xnkOjoP2uEysTMifI/dJF7bV1KhFl3Md/ nMxbDoqtOfALitKcUZQx/p99WJf7gpRPgbyt1RvqXCSTZU7xwml+PgPJ1d99KJ8hECg3 GLnA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id mh4si1138534ejb.339.2020.06.29.23.12.50; Mon, 29 Jun 2020 23:13:13 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729891AbgF3GLv (ORCPT + 99 others); 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: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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