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,URIBL_BLOCKED,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 2B1B7C43381 for ; Wed, 27 Mar 2019 13:28:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EC4532087C for ; Wed, 27 Mar 2019 13:28:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="VwKUcHV0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730032AbfC0N2G (ORCPT ); Wed, 27 Mar 2019 09:28:06 -0400 Received: from mail.skyhub.de ([5.9.137.197]:36602 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729607AbfC0N2G (ORCPT ); Wed, 27 Mar 2019 09:28:06 -0400 Received: from zn.tnic (p200300EC2F098000329C23FFFEA6A903.dip0.t-ipconnect.de [IPv6:2003:ec:2f09:8000:329c:23ff:fea6:a903]) (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 EFAAA1EC014B; Wed, 27 Mar 2019 14:28:03 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1553693284; 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=7qTz0uTWMtK6x7ClRm+ljT0eSvDxnKav3O9ffZ/1+lM=; b=VwKUcHV08ODOvFctoZKnT4kCPmBRt/65Qz2etf6IQ0oLirWzl56H3KAm4xUZSFRaO7xUC0 3Rn8iVMGPKmxE828o5d9Lq4Z9mw/7xNCDs8U4X7vfbV3oPqHBEIQ/dkjv5enIq30sBdhAU gMw6Grxu5jcoFkhVR8zV3h2h5CDuef0= Date: Wed, 27 Mar 2019 14:28:05 +0100 From: Borislav Petkov To: syzbot Cc: frederic@kernel.org, gustavo@embeddedor.com, hpa@zytor.com, linux-kernel@vger.kernel.org, mhiramat@kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Subject: Re: WARNING in arch_install_hw_breakpoint Message-ID: <20190327132805.GG32571@zn.tnic> References: <000000000000639f6a0584d11b82@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <000000000000639f6a0584d11b82@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 Sat, Mar 23, 2019 at 11:22:06PM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: fd1f297b Merge tag 'drm-fixes-2019-03-22' of git://anongit.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1574f56d200000 > kernel config: https://syzkaller.appspot.com/x/.config?x=9a31fb246de2a622 > dashboard link: https://syzkaller.appspot.com/bug?extid=370a6b0f11867bf13515 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1157b7cf200000 > > Bisection is inconclusive: the bug happens on the oldest tested release. > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10ca39b3200000 > final crash: https://syzkaller.appspot.com/x/report.txt?x=12ca39b3200000 > console output: https://syzkaller.appspot.com/x/log.txt?x=14ca39b3200000 So I've tried running your .config in both an AMD and an Intel guest like this: ./syz-execprog -repeat=0 repro.syz and killed it after 30K executed programs without success in reproducing. Either I'm missing something and my environment doesn't match yours - because looking at your console output it happens almost immediately after starting - or it has been fixed in the meantime... Hmmm. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.