Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755563AbaAHThF (ORCPT ); Wed, 8 Jan 2014 14:37:05 -0500 Received: from mail.skyhub.de ([78.46.96.112]:39426 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750861AbaAHThA (ORCPT ); Wed, 8 Jan 2014 14:37:00 -0500 Date: Wed, 8 Jan 2014 20:36:55 +0100 From: Borislav Petkov To: "H. Peter Anvin" Cc: halfdog , Konrad Rzeszutek Wilk , Thomas Gleixner , Ingo Molnar , x86@kernel.org, linux-kernel@vger.kernel.org, Ben Hutchings Subject: Re: Sanitize CPU-state when switching tasks (was sanitize CPU-state when switching from virtual-8086 mode to other task) Message-ID: <20140108193655.GD5098@pd.tnic> References: <52BF4A80.3010503@halfdog.net> <52BF8AEE.6020904@zytor.com> <52C089AC.4000401@halfdog.net> <52C0C9F4.50101@zytor.com> <52C196C3.1040300@halfdog.net> <52C31027.2030101@zytor.com> <20131231192106.GA22535@phenom.dumpdata.com> <52C347F0.8070902@zytor.com> <52CD022E.9040107@halfdog.net> <52CD8E10.3010204@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <52CD8E10.3010204@zytor.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 08, 2014 at 09:42:40AM -0800, H. Peter Anvin wrote: > Adding Borislav. > > Boris, do you happen to know of any erratum on AMD E-350 which may be > in play here? Interesting. Well, nothing looks even remotely related from looking at the F14h rev guide here: http://developer.amd.com/wordpress/media/2012/10/47534_14h_Mod_00h-0Fh_Rev_Guide.pdf Btw, hd (if that is your real name :-)), can you post /proc/cpuinfo? I think I might have a E-350 here too and I could try to reproduce. Btw, how exactly do you trigger? You run FpuStateTaskSwitchShmemXattrHandlersOverwriteWithNullPage.c first to modify shmem_xattr_handlers and then ManipulatedXattrHandlerForPrivEscalation.c? You need a 32-bit kernel and userspace, right? Anything else? Thanks. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/