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=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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 A36F4C433E0 for ; Wed, 22 Jul 2020 14:39:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7670420771 for ; Wed, 22 Jul 2020 14:39:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="m6/oHRfM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732626AbgGVOj6 (ORCPT ); Wed, 22 Jul 2020 10:39:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53474 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728837AbgGVOj6 (ORCPT ); Wed, 22 Jul 2020 10:39:58 -0400 Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4DFD7C0619DC for ; Wed, 22 Jul 2020 07:39:58 -0700 (PDT) Received: by mail-pg1-x542.google.com with SMTP id l63so1352445pge.12 for ; Wed, 22 Jul 2020 07:39:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=16Y8bWUyysyD6RX/r5XeFDtXgEqasoaIb5QlD/Fn9gY=; b=m6/oHRfM8k+Nz9zcIKR0qeNOD5tEEwDyDId3PTGUUDN4p9UGsI0fn00KoI9/QyQ1v8 apM4heGRp20HL1suh7bRv/oYHQT+8FbwsOEUGzspMxDK5to8xMCVJ1IVeG4ELQ8PRnvM UVLan5R8bzs3XxdU33aX86W1aVtTlW0hiqd8Y= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=16Y8bWUyysyD6RX/r5XeFDtXgEqasoaIb5QlD/Fn9gY=; b=RiNjsmaL2WLc6g13T1Dm3iFbcp6JQYOVr6GI+cJL5w8fC80NTYP2rgGulxRfvVl3Y/ HFelRMXPCu9iB/FD0+Z18aNieZfMU0E1hrGIk2RXkKsZGjSvy8M7o4zJ2qAmKOB2xE4M 5E8te6tIG7yhCHiE99ZWtXA6ksu6W86OtXp1ACpfbvkSEn9V6k4lIb/Xe1A/8prPYWrq 5O8DGjU5y9oCXhO2+/xdgwKrEDhJgli/Re/qxRQ382ICPhHgyRILW4NUqCWXr5SCR5z+ li8c9/qV59EB+jDaeUbauy+uY5j83IblF+iWoAl9yA1A5jDWQkXplieI0I+T+N/yYx3B /3Ww== X-Gm-Message-State: AOAM533utEUK5F6r4mls8PGlCvq+TfdNAoIhqp79vXfYrtryYhoIy4M7 9rsUhJ5InUfHJhvLOSfblS2QpQ== X-Google-Smtp-Source: ABdhPJybf+F7pwNThVxNEaAxDjLaau/pl+1vyZd8ayI2jp7rUGVlHGz+ar7yf1UhbFootA15osR7TA== X-Received: by 2002:aa7:9ac6:: with SMTP id x6mr3300pfp.326.1595428797861; Wed, 22 Jul 2020 07:39:57 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id q17sm116352pfk.0.2020.07.22.07.39.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Jul 2020 07:39:56 -0700 (PDT) Date: Wed, 22 Jul 2020 07:39:55 -0700 From: Kees Cook To: Miroslav Benes Cc: Kristen Carlson Accardi , tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, arjan@linux.intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, kernel-hardening@lists.openwall.com, rick.p.edgecombe@intel.com, live-patching@vger.kernel.org Subject: Re: [PATCH v4 00/10] Function Granular KASLR Message-ID: <202007220738.72F26D2480@keescook> References: <20200717170008.5949-1-kristen@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 22, 2020 at 11:27:30AM +0200, Miroslav Benes wrote: > Let me CC live-patching ML, because from a quick glance this is something > which could impact live patching code. At least it invalidates assumptions > which "sympos" is based on. In a quick skim, it looks like the symbol resolution is using kallsyms_on_each_symbol(), so I think this is safe? What's a good selftest for live-patching? -- Kees Cook