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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFF93C433EF for ; Sat, 14 May 2022 21:43:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229881AbiENVmo (ORCPT ); Sat, 14 May 2022 17:42:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235243AbiENVmn (ORCPT ); Sat, 14 May 2022 17:42:43 -0400 Received: from mail-pg1-x531.google.com (mail-pg1-x531.google.com [IPv6:2607:f8b0:4864:20::531]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA38E1838F for ; Sat, 14 May 2022 14:42:41 -0700 (PDT) Received: by mail-pg1-x531.google.com with SMTP id x12so10665816pgj.7 for ; Sat, 14 May 2022 14:42:41 -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=23xyQlazTAPWzzday3S3EoO5Wm7fZvGvsyQkqyX645Y=; b=TMkRhl/wkoxlOPIUjWFpDEdYryjRLo1aur2RO+svl712U8by/JGzX+5ItuVlWn03tA KgpiOLWAc0epLFPuSyHy+n6EnTesI6a5Crv6i50DYOfevDec6pWiGr/qo7ei40Il/CZF 9DlqRR/GnjNe/MZg9aFcb3rMM559MvTBwPk+Y= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=23xyQlazTAPWzzday3S3EoO5Wm7fZvGvsyQkqyX645Y=; b=g6KackJ9E1+7LQsQCqvOzd7iGBMT6jHroCirMZfpTTuNe2fhGQOhT5lTU5p/MZDNUz YY/vwcAcHxNrGWx8eT8lTC0ybf3Yx7+rcx+ovBKH2fMP1q5s2JxfK20m5SdAiI6On/vY fATBE2re/dnWS7NiAPs+/SCgCPy4TGQWR9RA637D36KLRGe52N4zRBO7WYHuLQaUEEgL Go/yY7UKmgXQzqPmOAISKIkprbKVsNcdSChkhyc0OWttb5yvS61SxtxdadnRGcb/k5MR EwPd/wIeY0v5X5oQ+55PLOMdFt4/Oan5U7d036fLKFbLHgvqPDLWzdH6l1CbHAU4ZMs/ 6y8w== X-Gm-Message-State: AOAM532Mx+ver+9NoSDpaI4WB7WhNj1rdK6dxFicrLDT11ajEgroAZ4u UIxxNen4Rrh57inSEoxal19RBQ== X-Google-Smtp-Source: ABdhPJzM6sSqhlRvKZoHaTHCB67LhQRuHcOSpewjHrxQxN3l5+JJ6IuUuizN+MmH7IWYXI6gsxrCog== X-Received: by 2002:a05:6a00:c91:b0:510:73d6:a890 with SMTP id a17-20020a056a000c9100b0051073d6a890mr10685973pfv.42.1652564560673; Sat, 14 May 2022 14:42:40 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id h20-20020aa786d4000000b0050dc76281a5sm4083831pfo.127.2022.05.14.14.42.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 May 2022 14:42:40 -0700 (PDT) Date: Sat, 14 May 2022 14:42:39 -0700 From: Kees Cook To: Sami Tolvanen Cc: linux-kernel@vger.kernel.org, Josh Poimboeuf , Peter Zijlstra , x86@kernel.org, Catalin Marinas , Will Deacon , Mark Rutland , Nathan Chancellor , Nick Desaulniers , Joao Moreira , Sedat Dilek , Steven Rostedt , linux-hardening@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev Subject: Re: [RFC PATCH v2 02/21] arm64/vdso: Filter out CC_FLAGS_CFI Message-ID: <202205141442.9DBF84F15C@keescook> References: <20220513202159.1550547-1-samitolvanen@google.com> <20220513202159.1550547-3-samitolvanen@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220513202159.1550547-3-samitolvanen@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org On Fri, May 13, 2022 at 01:21:40PM -0700, Sami Tolvanen wrote: > Explicitly filter out CC_FLAGS_CFI in preparation for the flags being > removed from CC_FLAGS_LTO. > > Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook -- Kees Cook