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=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 43017C43381 for ; Fri, 12 Mar 2021 02:46:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D9DA64F6B for ; Fri, 12 Mar 2021 02:46:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231543AbhCLCpe (ORCPT ); Thu, 11 Mar 2021 21:45:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231486AbhCLCpT (ORCPT ); Thu, 11 Mar 2021 21:45:19 -0500 Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A0E1C061574 for ; Thu, 11 Mar 2021 18:45:19 -0800 (PST) Received: by mail-pf1-x433.google.com with SMTP id a188so874537pfb.4 for ; Thu, 11 Mar 2021 18:45:19 -0800 (PST) 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=AssdNLgVnE+ciH4+zO5lxL3YhHsnzigu9rKdFnlTKlk=; b=hIQlmeCWP7pIGfJ5QNK11xJD01Ah5yhUwvyA2ww7yhNm+fTC+X7nXsvxCf/cfPJkw8 nkcI9fivFzWEt/maVUeYndiFDn25FO8B7W04AYR/UDOt3gRYjRZzQNUCnbTnncwE0cZP XqXc4TvxtdB2n7+7RQIxaEFd3VdXAy+vdwy6o= 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=AssdNLgVnE+ciH4+zO5lxL3YhHsnzigu9rKdFnlTKlk=; b=JUVwRWLKHl9L0j0aPfCxhsnz1AbH6Zn/tyQfzE7953Ytzx62g5uo+U43MxINs0uWCY NZshKGW7Hke2YIOOlWxs10ZOxotfG+F1PDaB7Ic2XdZlSBY6BZjmg0ArZX9pjM3J+Fqr fZlBXOivbBwISW7WvjAFd4fTOmRBFlY67EUnsrRQrwCu+JZla9SKyrFs/VD/iie2+0ej lQuO3+ZTaXf9RRsStJI49r8qo42zsRP3xjovCAynX2xXUNWLYfJnZ81XMCTC1Ekl1ECT iGJgbkeBjG+Mi6RMZA2s7MWQg1+F3S0Ex1PT/CQp9k0D24coFJAxnfxX/06c0m5q/o01 /hYw== X-Gm-Message-State: AOAM5321kVwU944Uxy8l2k1oqBDJtgZCeHd40vIygvZDHpbor3Z4iods 9xfphh/NOAhM2K2EYCJQMndyvQ== X-Google-Smtp-Source: ABdhPJxI0qWCdvIWD0Iv1exumtIeT9fGoJnsI5bP8+qNI3aaTbYLPtnoi/Tg5jl4840YLUIassNTiw== X-Received: by 2002:a63:1e0a:: with SMTP id e10mr9855197pge.3.1615517118872; Thu, 11 Mar 2021 18:45:18 -0800 (PST) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id 14sm3673048pfo.141.2021.03.11.18.45.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Mar 2021 18:45:18 -0800 (PST) Date: Thu, 11 Mar 2021 18:45:17 -0800 From: Kees Cook To: Sami Tolvanen Cc: Nathan Chancellor , Nick Desaulniers , Masahiro Yamada , Will Deacon , Jessica Yu , Arnd Bergmann , Tejun Heo , bpf@vger.kernel.org, linux-hardening@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 08/17] bpf: disable CFI in dispatcher functions Message-ID: <202103111845.3A6EEB3E43@keescook> References: <20210312004919.669614-1-samitolvanen@google.com> <20210312004919.669614-9-samitolvanen@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210312004919.669614-9-samitolvanen@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On Thu, Mar 11, 2021 at 04:49:10PM -0800, Sami Tolvanen wrote: > BPF dispatcher functions are patched at runtime to perform direct > instead of indirect calls. Disable CFI for the dispatcher functions to > avoid conflicts. > > Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook -- Kees Cook