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 C7C21C433EF for ; Sun, 30 Jan 2022 12:25:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354777AbiA3MZk (ORCPT ); Sun, 30 Jan 2022 07:25:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56660 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354768AbiA3MZj (ORCPT ); Sun, 30 Jan 2022 07:25:39 -0500 Received: from mail-ej1-x62a.google.com (mail-ej1-x62a.google.com [IPv6:2a00:1450:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3AED6C061748 for ; Sun, 30 Jan 2022 04:25:38 -0800 (PST) Received: by mail-ej1-x62a.google.com with SMTP id p15so33971665ejc.7 for ; Sun, 30 Jan 2022 04:25:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloudflare.com; s=google; h=references:user-agent:from:to:cc:subject:in-reply-to:date :message-id:mime-version; bh=PMTYH8vYxJzYzIKQ4wJ1Cn/QVbnABT43BbzXgdJrWQI=; b=apo0H/0Dyl2t3hk8E0D2z85aDd6iOJNXpJKyEbBY7/JTNGPCdkbdnzGkICjahHHvdg ikbaCSmfvGWZBU6IZXUhNElfru0/txxioJdYFDH5e/cXST9poMaEGPF58kTHE38lu4h0 h8EdekFT0o5IRjk4tqQ0MYnPW0lGioEBYLaYk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:references:user-agent:from:to:cc:subject :in-reply-to:date:message-id:mime-version; bh=PMTYH8vYxJzYzIKQ4wJ1Cn/QVbnABT43BbzXgdJrWQI=; b=nlZ0v9B9VN6infWexZZ5+Ya6tuu5a9sMWMbwCKO33JiWxizq0IgrfdkZJF2R9piiWC pO4JnLQJX8e6svBK6iUbU9XqPpPBNmylLWX410BF6JED/HdT8kYjHTkB2H6nx4i+mxYQ 8o7Wt1W/dbmxEd0sNUnR3+XPoxbRNnrzbD9t2ev/qNgNADuT/kVZ8t3+aaC7GkneE2dW OFJIYh1JGnMRR8g+Kko3hCT1m206m2w+duoe+vQUH1eGCwAx9UF6nWSfHAL7Kld69li3 /dk42i0Lunzj0bn10G0C9uXLqzPv1fj9vz8cBXQhU7j5fAKehwrD/PUpwjHlwdWz5/QZ 0gQQ== X-Gm-Message-State: AOAM5318N57dW6ME0J7AqLaCQrhgOO7ZCWA6o1O5o1KCLP2VLSN8nYJ4 tYdL14bchfwRUQE5y+IeOZIcgQ== X-Google-Smtp-Source: ABdhPJy3rWsVAeaHCILbvxyPLUIcCktog468JC/fPRiLCOsjiBYoYIRU/3dSm2dhcMilSbKwZrs6iA== X-Received: by 2002:a17:906:730a:: with SMTP id di10mr13618818ejc.489.1643545536662; Sun, 30 Jan 2022 04:25:36 -0800 (PST) Received: from cloudflare.com ([2a01:110f:4809:d800::e00]) by smtp.gmail.com with ESMTPSA id s19sm13891576edr.23.2022.01.30.04.25.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 Jan 2022 04:25:36 -0800 (PST) References: <20220130030352.2710479-1-hefengqing@huawei.com> User-agent: mu4e 1.1.0; emacs 27.2 From: Jakub Sitnicki To: Alexei Starovoitov Cc: He Fengqing , Marek Majkowski , Network Development , bpf , LKML , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend Subject: Re: [bpf-next] bpf: Add CAP_NET_ADMIN for sk_lookup program type In-reply-to: Date: Sun, 30 Jan 2022 13:25:35 +0100 Message-ID: <87zgndqukg.fsf@cloudflare.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jan 30, 2022 at 04:24 AM CET, Alexei Starovoitov wrote: > On Sat, Jan 29, 2022 at 6:16 PM He Fengqing wrote: >> >> SK_LOOKUP program type was introduced in commit e9ddbb7707ff >> ("bpf: Introduce SK_LOOKUP program type with a dedicated attach point"), >> but the commit did not add SK_LOOKUP program type in net admin prog type. >> I think SK_LOOKUP program type should need CAP_NET_ADMIN, so add SK_LOOKUP >> program type in net_admin_prog_type. > > I'm afraid it's too late to change. > > Jakub, Marek, wdyt? That's definitely an oversight on my side, considering that CAP_BPF came in 5.8, and sk_lookup program first appeared in 5.9. Today it's possible to build a usable sk_lookup program without CAP_NET_ADMIN if you go for REUSEPORT_SOCKARRAY map instead of SOCKMAP/HASH. Best I can come up is a "phase it out" approach. Put the CAP_NET_ADMIN load-time check behind a config option, defaulting to true?, and wait for it to become obsolete.