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=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 EEE02C2D0A8 for ; Mon, 28 Sep 2020 20:24:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 525062083B for ; Mon, 28 Sep 2020 20:24:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="LJzByyTu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726607AbgI1UYD (ORCPT ); Mon, 28 Sep 2020 16:24:03 -0400 Received: from mail.skyhub.de ([5.9.137.197]:51118 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726393AbgI1UYD (ORCPT ); Mon, 28 Sep 2020 16:24:03 -0400 Received: from zn.tnic (p200300ec2f0722007a3ac295e7df05a2.dip0.t-ipconnect.de [IPv6:2003:ec:2f07:2200:7a3a:c295:e7df:5a2]) (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 4CCF71EC0409; Mon, 28 Sep 2020 22:24:00 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1601324640; 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=/Vc/EOWpwj9Re8MBl2KQeXE6/D+XkoCsL9dg0BIB/+M=; b=LJzByyTuouI26OvCqH9CQiy1LAqR9Ph0oyLxC3Cd7SFaYOnSrETykMBU3/0A1zIbxWEMhD 518+V9wZQkoBaA1x86oe5f80kUZTp2gwaStEuB4FI6shvVMFcospChGJR3o6OZmib+8N6E 9b3zWcFap9KNEw5op4D9lwd3ph92eZo= Date: Mon, 28 Sep 2020 22:23:53 +0200 From: Borislav Petkov To: Dmitry Vyukov Cc: Alexander Potapenko , Marco Elver , syzbot , Arnaldo Carvalho de Melo , Alexander Shishkin , "H. Peter Anvin" , Jiri Olsa , LKML , Mark Rutland , Ingo Molnar , Namhyung Kim , Peter Zijlstra , syzkaller-bugs , Thomas Gleixner , the arch/x86 maintainers , clang-built-linux Subject: Re: general protection fault in perf_misc_flags Message-ID: <20200928202353.GI1685@zn.tnic> References: <00000000000052569205afa67426@google.com> <20200927145737.GA4746@zn.tnic> <20200928083819.GD1685@zn.tnic> <20200928085401.GE1685@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 28, 2020 at 12:33:57PM +0200, Dmitry Vyukov wrote: > It may be related to VMs, but also may well not be related to VMs. Right, and so I tried to set it up on a test box here, it looks like it worked, see below. I'll let it fuzz in the coming days and see what explodes... 2020/09/28 22:19:51 booting test machines... 2020/09/28 22:19:51 wait for the connection from test machine... 2020/09/28 22:20:27 machine check: 2020/09/28 22:20:27 syscalls : 3389/3739 2020/09/28 22:20:27 code coverage : enabled 2020/09/28 22:20:27 comparison tracing : enabled 2020/09/28 22:20:27 extra coverage : enabled 2020/09/28 22:20:27 setuid sandbox : enabled 2020/09/28 22:20:27 namespace sandbox : enabled 2020/09/28 22:20:27 Android sandbox : enabled 2020/09/28 22:20:27 fault injection : enabled 2020/09/28 22:20:27 leak checking : CONFIG_DEBUG_KMEMLEAK is not enabled 2020/09/28 22:20:27 net packet injection : enabled 2020/09/28 22:20:27 net device setup : enabled 2020/09/28 22:20:27 concurrency sanitizer : /sys/kernel/debug/kcsan does not exist 2020/09/28 22:20:27 devlink PCI setup : PCI device 0000:00:10.0 is not available 2020/09/28 22:20:27 USB emulation : enabled 2020/09/28 22:20:27 hci packet injection : enabled 2020/09/28 22:20:27 wifi device emulation : enabled 2020/09/28 22:20:29 corpus : 458 (deleted 0 broken) 2020/09/28 22:20:31 seeds : 620/667 2020/09/28 22:20:31 VMs 1, executed 0, corpus cover 0, corpus signal 0, max signal 0, crashes 0, repro 0 2020/09/28 22:20:41 VMs 2, executed 12, corpus cover 0, corpus signal 0, max signal 0, crashes 0, repro 0 2020/09/28 22:20:51 VMs 2, executed 28, corpus cover 5578, corpus signal 5925, max signal 10155, crashes 0, repro 0 2020/09/28 22:21:01 VMs 3, executed 179, corpus cover 11792, corpus signal 10881, max signal 19337, crashes 0, repro 0 ... -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette