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=-3.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 C83C6C433E0 for ; Fri, 7 Aug 2020 19:12:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 68BBA2086A for ; Fri, 7 Aug 2020 19:12:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=xenosoft.de header.i=@xenosoft.de header.b="gtD8Yifa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726200AbgHGTMP (ORCPT ); Fri, 7 Aug 2020 15:12:15 -0400 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.161]:27949 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725970AbgHGTMO (ORCPT ); Fri, 7 Aug 2020 15:12:14 -0400 X-Greylist: delayed 15999 seconds by postgrey-1.27 at vger.kernel.org; Fri, 07 Aug 2020 15:12:13 EDT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1596827532; s=strato-dkim-0002; d=xenosoft.de; h=To:In-Reply-To:Cc:References:Message-Id:Date:Subject:From: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=P7mhstXZ3r0aQzc0W25GtF8XW6jQOXfcbCvk2BpLqd4=; b=gtD8Yifad49HtTIHnnFZCLt/JeinfJOUn9Lgf4Bno5aLASOk4/48s4qdq6qs9vjl/R Ddefe3cog4Otn2y0rq0/ROX4NU9cXj/o2iMJpq/dJHfS4IVtMrsrrcnzacTYJkTGky59 1D4AGFS0DWRTDg8NoomMKk4y8c2f13H14D4bTc5XdXHrpsrTtLUKxaBTVjG85ykgnBPL WED9y0qBVfFypJDd0NDfqSrQb9/F7JjGAwBAFEbdy/IePhC5/r8bnSwOPfocFTNwtxvt cigRU7RWypzJ0Id4ETccajbzIHGx2tyj60fSKD7WCfpfwyOiu348/UEHqQhf/IZ2j+Y6 xabg== X-RZG-AUTH: ":L2QefEenb+UdBJSdRCXu93KJ1bmSGnhMdmOod1DhGN0rBVhd9dFr6KxrfO5Oh7R7b2Zx37owlXZszUtLBzgXn3WKO295t5bmobInEcRf" X-RZG-CLASS-ID: mo00 Received: from [IPv6:2a01:598:b10d:ea0c:6c03:2994:72c7:709e] by smtp.strato.de (RZmta 46.10.5 AUTH) with ESMTPSA id 60686ew77JC9QLb (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Fri, 7 Aug 2020 21:12:09 +0200 (CEST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Christian Zigotzky Mime-Version: 1.0 (1.0) Subject: Re: [Latest Git kernel/Linux-next kernel] Xorg doesn't start after the seccomp updates v5.9-rc1 Date: Fri, 7 Aug 2020 21:12:08 +0200 Message-Id: References: <202008071043.2EABB8D24B@keescook> Cc: linuxppc-dev , Linux Kernel Mailing List , "R.T.Dickinson" , Darren Stevens , mad skateman In-Reply-To: <202008071043.2EABB8D24B@keescook> To: Kees Cook X-Mailer: iPhone Mail (17G68) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Kees, Thanks a lot for your patch! I think your patch works because I can patch th= e Git source code but the kernel doesn=E2=80=99t boot. In my point of view y= our modifications aren=E2=80=99t responsible for this second issue. The kern= el can=E2=80=99t initialize the graphics card anymore. I think the latest DR= M updates are responsible for the second issue. Because of this second issue= I can=E2=80=99t test your patch. Please test the latest Git kernel. Thanks, Christian > On 7. Aug 2020, at 19:45, Kees Cook wrote: >=20 > =EF=BB=BFOn Fri, Aug 07, 2020 at 04:45:14PM +0200, Christian Zigotzky wrot= e: >> But Xorg works on Ubuntu 10.04.4 (PowerPC 32-bit), openSUSE Tumbleweed >> 20190722 PPC64 and on Fedora 27 PPC64 with the latest Git kernel. >>=20 >> I bisected today [4]. >>=20 >> Result: net/scm: Regularize compat handling of scm_detach_fds() >> (c0029de50982c1fb215330a5f9d433cec0cfd8cc) [5] is the first bad commit. >>=20 >> This commit has been merged with the seccomp updates v5.9-rc1 on 2020-08-= 04 >> 14:11:08 -0700 [1]. Since these updates, Xorg doesn't start anymore on so= me >> Linux distributions. >=20 > Hi! Thanks for bisecting; yes, sorry for the trouble (I'm still trying > to understand why my compat tests _passed_...). Regardless, can you try > this patch: >=20 > https://lore.kernel.org/lkml/20200807173609.GJ4402@mussarela/ >=20 > --=20 > Kees Cook