From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 414A67F9; Sat, 23 Sep 2023 04:21:40 +0000 (UTC) Received: from omta36.uswest2.a.cloudfilter.net (omta36.uswest2.a.cloudfilter.net [35.89.44.35]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6B6AD19E; Fri, 22 Sep 2023 21:21:39 -0700 (PDT) Received: from eig-obgw-5003a.ext.cloudfilter.net ([10.0.29.159]) by cmsmtp with ESMTP id jjIJqsSoIEoVsju9CqG1gT; Sat, 23 Sep 2023 04:21:38 +0000 Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with ESMTPS id ju9BqFFs9Vpk9ju9BqNbYN; Sat, 23 Sep 2023 04:21:38 +0000 X-Authority-Analysis: v=2.4 cv=CLw54DnD c=1 sm=1 tr=0 ts=650e67d2 a=1YbLdUo/zbTtOZ3uB5T3HA==:117 a=P7XfKmiOJ4/qXqHZrN7ymg==:17 a=OWjo9vPv0XrRhIrVQ50Ab3nP57M=:19 a=dLZJa+xiwSxG16/P+YVxDGlgEgI=:19 a=IkcTkHD0fZMA:10 a=zNV7Rl7Rt7sA:10 a=wYkD_t78qR0A:10 a=NEAV23lmAAAA:8 a=J1Y8HTJGAAAA:8 a=1XWaLZrsAAAA:8 a=VwQbUJbxAAAA:8 a=20KFwNOVAAAA:8 a=cm27Pg_UAAAA:8 a=YSKGN3ub9cUXa_79IdMA:9 a=QEXdDO2ut3YA:10 a=y1Q9-5lHfBjTkpIzbSAN:22 a=AjGcO6oz07-iQ99wixmX:22 a=xmb-EsYY8bH0VWELuYED:22 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=embeddedor.com; s=default; h=Content-Transfer-Encoding:Content-Type: In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date:Message-ID:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=LPvTS1JzLrPismrf0ber/g2NvMqPEXpyMEUgBlNSyx4=; b=IxJX69U/JBsYGBW9ZV493LUEH1 y/qZBCwU71a2dCSFaPOR+ELmo2S7dIQnOQN1I0vArT5N8krNNGsGB6BRp/TOhHlh8K9mLDH+9eyvj eYM17ijyOgXB4Bo3yHFbkyTdiz/Ib70vKx8rNQ+Z3SsLa6wAQ+s6Ko9SEgYBrl5ieIKGYBAto9prW cKixZSotOqr9gIjhuK98DWEt1yikfE3iIhcLNLiQqZZ3AQZAbgGi4ZEzq5E1FPMTnb4wI4nlk7aQX EGtqe9Gmz2LkXaymYyyMRRgBn/oLq5VUa3M0cOFaBUyk0U4gO3mxRKn3tQPkD6a6OKAV1/DQimIr9 smbUw4Dw==; Received: from [94.239.20.48] (port=35670 helo=[192.168.1.98]) by gator4166.hostgator.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.96) (envelope-from ) id 1qjkIL-004OGj-0o; Fri, 22 Sep 2023 12:50:25 -0500 Message-ID: <68545f64-067f-4109-8e63-dd00d92cbe09@embeddedor.com> Date: Fri, 22 Sep 2023 19:51:22 -0600 Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [PATCH 03/14] ipv6: Annotate struct ip6_sf_socklist with __counted_by Content-Language: en-US To: Kees Cook , Jakub Kicinski Cc: "David S. Miller" , Eric Dumazet , Paolo Abeni , netdev@vger.kernel.org, Jamal Hadi Salim , David Ahern , Martin KaFai Lau , "Gustavo A. R. Silva" , Alexei Starovoitov , Yisen Zhuang , Salil Mehta , Claudiu Manoil , Vladimir Oltean , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Ajay Sharma , Alex Elder , Pravin B Shelar , Shaokun Zhang , Cong Wang , Jiri Pirko , Nathan Chancellor , Nick Desaulniers , Tom Rix , Simon Horman , linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-rdma@vger.kernel.org, dev@openvswitch.org, linux-parisc@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org References: <20230922172449.work.906-kees@kernel.org> <20230922172858.3822653-3-keescook@chromium.org> From: "Gustavo A. R. Silva" In-Reply-To: <20230922172858.3822653-3-keescook@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 94.239.20.48 X-Source-L: No X-Exim-ID: 1qjkIL-004OGj-0o X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: ([192.168.1.98]) [94.239.20.48]:35670 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 0 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfL14ygkdy/JX+SlEQ+hwGUSzJFxDi++ZyKHRGzosviPye7A5K6FcGFmObssklXgZFJAjk8T/00MNO1sVvfzC+vp+zJF8dgaI5n/BleNIAaSRlBvXIIeu /LgZitsFXwlT+OYj13dySlkMFUSalV85WsmfJvC+KwaLGmfhc3UfsS8uaGwcqXIZHuSXp3JuQq571ymtHC/QS2HL3KfGmWtMe1aKtwJRrUPKH/+cY4W6Io4T jktaCOdJixEauX6t/XcrPzpsPLkmIvDgMm55D6Qp9UwQVh70cis7ZbBj4/0UnyeDqFCIiTv0H4lsprk0aKJvsa+LlSURr/NVSOMwm9M9CvgMGFia3z2MvFLZ 0USv1Sn6dNbjfXjiSvVrTHiyGfsLCLqK25J2ClDwEgSun5U0wcI= X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net On 9/22/23 11:28, Kees Cook wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS > (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct ip6_sf_socklist. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: "David S. Miller" > Cc: Eric Dumazet > Cc: Jakub Kicinski > Cc: Paolo Abeni > Cc: netdev@vger.kernel.org > Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo > --- > include/net/if_inet6.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h > index c8490729b4ae..3e454c4d7ba6 100644 > --- a/include/net/if_inet6.h > +++ b/include/net/if_inet6.h > @@ -89,7 +89,7 @@ struct ip6_sf_socklist { > unsigned int sl_max; > unsigned int sl_count; > struct rcu_head rcu; > - struct in6_addr sl_addr[]; > + struct in6_addr sl_addr[] __counted_by(sl_max); > }; > > #define IP6_SFBLOCK 10 /* allocate this many at once */