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=-0.8 required=3.0 tests=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 ACE4AC433DF for ; Sat, 13 Jun 2020 15:54:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8B4302074D for ; Sat, 13 Jun 2020 15:54:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726466AbgFMPyw (ORCPT ); Sat, 13 Jun 2020 11:54:52 -0400 Received: from mx2.suse.de ([195.135.220.15]:47286 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726323AbgFMPyw (ORCPT ); Sat, 13 Jun 2020 11:54:52 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 8A9DDAB76; Sat, 13 Jun 2020 15:54:54 +0000 (UTC) Date: Sat, 13 Jun 2020 17:54:49 +0200 From: Borislav Petkov To: Qian Cai Cc: thomas.lendacky@amd.com, brijesh.singh@amd.com, tglx@linutronix.de, glider@google.com, peterz@infradead.org, dvyukov@google.com, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org Subject: Re: AMD SME + KASAN = doom Message-ID: <20200613155449.GB3090@zn.tnic> References: <20200613152408.GB992@lca.pw> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200613152408.GB992@lca.pw> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jun 13, 2020 at 11:24:08AM -0400, Qian Cai wrote: > CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=y + KASAN (inline) will reset > the host right away after those lines on linux-next (the mainline has > the same problem when I tested a while back, so it seems never work), $ head arch/x86/mm/Makefile # SPDX-License-Identifier: GPL-2.0 # Kernel does not boot with instrumentation of tlb.c and mem_encrypt*.c KCOV_INSTRUMENT_tlb.o := n KCOV_INSTRUMENT_mem_encrypt.o := n KCOV_INSTRUMENT_mem_encrypt_identity.o := n KASAN_SANITIZE_mem_encrypt.o := n KASAN_SANITIZE_mem_encrypt_identity.o := n so something else needs to be de-KASAN-ed too. For now flip your Subject: AMD SME - KASAN = boot. -- Regards/Gruss, Boris. SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg