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=-15.8 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,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 9469EC4338F for ; Mon, 2 Aug 2021 09:01:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 73E7E60F39 for ; Mon, 2 Aug 2021 09:01:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232870AbhHBJBM (ORCPT ); Mon, 2 Aug 2021 05:01:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232838AbhHBJBM (ORCPT ); Mon, 2 Aug 2021 05:01:12 -0400 Received: from mail-lj1-x229.google.com (mail-lj1-x229.google.com [IPv6:2a00:1450:4864:20::229]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BBD1FC06175F for ; Mon, 2 Aug 2021 02:01:02 -0700 (PDT) Received: by mail-lj1-x229.google.com with SMTP id q2so23011264ljq.5 for ; Mon, 02 Aug 2021 02:01:02 -0700 (PDT) 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=FKkTDOoJkTf8q49ytftID668qe8fzuG5BawdaIV8kuA=; b=pIS2pGlmP8ZlgfkVoEdnjZDGG4WXVsdEADYJypNWJGKoEsxopWQB09EloEpv6qM5X8 grmiivXghPgBVTrK7MXrIzJgb5qTx26Kk7x2FO/SrMMlXVv12UMLwYG8FcBIGeYzr9oz ThoXBUaqvnrT08bSpkwT8gIUhGBFdzx3ByNBw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:references:user-agent:from:to:cc:subject :in-reply-to:date:message-id:mime-version; bh=FKkTDOoJkTf8q49ytftID668qe8fzuG5BawdaIV8kuA=; b=Y8+ODxfPtKgk+KFJx0/fJq8oyeLdY1WbPiX+XMACpMqLJ8oFJ0AiYyWmQtPkgjgkJy kjpdSfzyySwBhoVRBwA1/UISXTgHy5AokmnFut+E+ZDvLrcByrelCy8rPnh9jUF0/wCh RsVbHQMHO6d48mncpM88GS/B0YlnhEnZrphvMJkUpuCbtpKsARx1GYO4YezT/1p6IWLz IyZpjnn5en1laFuNDg3n/K6dYtsn+oV1Zjs6eg5WbBOsShpXhJY90AYyKXrEsINmVWUD WMk8R9WjweRg2bBGxGNGfMCfQTFidT7M2YzQ+29VyLtf9SoKa1W7ezQlLoKe2LY5CWCI JCrw== X-Gm-Message-State: AOAM531nU4pBOO7VxxjgGbPIbZVCb2g0dz30xWEamYIfw0Bx0OtuTEbY aMmXWV45t7EQ4+ZhPTDTHYsEKQ== X-Google-Smtp-Source: ABdhPJzEdmFIA6o3qeJFou32X+VoHvsVJSbMF9hUy7rsrIHD1qctKAYoiZEMsNB6Aus5gsoeOfcNXA== X-Received: by 2002:a2e:a80f:: with SMTP id l15mr10869165ljq.354.1627894861160; Mon, 02 Aug 2021 02:01:01 -0700 (PDT) Received: from cloudflare.com (79.191.182.217.ipv4.supernova.orange.pl. [79.191.182.217]) by smtp.gmail.com with ESMTPSA id k8sm867574ljn.18.2021.08.02.02.01.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Aug 2021 02:01:00 -0700 (PDT) References: <20210731195038.8084-1-xiyou.wangcong@gmail.com> User-agent: mu4e 1.1.0; emacs 27.2 From: Jakub Sitnicki To: Cong Wang Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, jiang.wang@bytedance.com, Cong Wang , John Fastabend , Daniel Borkmann , Lorenz Bauer Subject: Re: [Patch bpf-next] unix_bpf: check socket type in unix_bpf_update_proto() In-reply-to: <20210731195038.8084-1-xiyou.wangcong@gmail.com> Date: Mon, 02 Aug 2021 11:00:59 +0200 Message-ID: <87sfzsnruc.fsf@cloudflare.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Sat, Jul 31, 2021 at 09:50 PM CEST, Cong Wang wrote: > From: Cong Wang > > As of now, only AF_UNIX datagram socket supports sockmap. > But unix_proto is shared for all kinds of AF_UNIX sockets, > so we have to check the socket type in > unix_bpf_update_proto() to explicitly reject other types, > otherwise they could be added into sockmap too. > > Fixes: c63829182c37 ("af_unix: Implement ->psock_update_sk_prot()") > Reported-by: Jakub Sitnicki > Cc: John Fastabend > Cc: Daniel Borkmann > Cc: Lorenz Bauer > Signed-off-by: Cong Wang > --- > net/unix/unix_bpf.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/net/unix/unix_bpf.c b/net/unix/unix_bpf.c > index 177e883f451e..20f53575b5c9 100644 > --- a/net/unix/unix_bpf.c > +++ b/net/unix/unix_bpf.c > @@ -105,6 +105,9 @@ static void unix_bpf_check_needs_rebuild(struct proto *ops) > > int unix_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore) > { > + if (sk->sk_type != SOCK_DGRAM) > + return -EOPNOTSUPP; > + > if (restore) { > sk->sk_write_space = psock->saved_write_space; > WRITE_ONCE(sk->sk_prot, psock->sk_proto); Acked-by: Jakub Sitnicki