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 A415C1DDFB for ; Tue, 23 May 2023 13:26:40 +0000 (UTC) Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B999118 for ; Tue, 23 May 2023 06:26:34 -0700 (PDT) Received: by mail-wm1-x331.google.com with SMTP id 5b1f17b1804b1-3f41d087a84so34749105e9.1 for ; Tue, 23 May 2023 06:26:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=resnulli-us.20221208.gappssmtp.com; s=20221208; t=1684848392; x=1687440392; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=wa8882brqQgfaqBSNJBl6uslG94ncgU4uoIf58nOBLw=; b=hdIPaBpjmBbqcN3z/LBvM13heonTzENrjLNOAmN61bjlkA4i2DYkpHXbtD2cq1teuY A7PxoQtJy5yrhpf3Q77PNeWeu8EER5SPmAbDb+SOKSxLIN+HJnjmhyh3MafFe9Y1Jqdj c6Mh8cGB1o9lzktYb454ARyJ+GBdGFUyeyvm8AsSfNagUEGymxFf/hDqVSWxEqCCR2E+ xP0AQZm52mA73lAFywKWwJTz/NHFcfpg3GLoysZw4z5dWc0LGQFwXoqj9sT2q2fSYRjP RIzrJTJlZX+byxxlCp+CBLXrz8pEDaD8lOAe/18VotOXjQAUBusvvqf4MiPcQFQqw1nO apkA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684848392; x=1687440392; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=wa8882brqQgfaqBSNJBl6uslG94ncgU4uoIf58nOBLw=; b=ZrShSOGZFyUeAxT6UXl8H+yAdGyf1JVqSO92wvd/BMYB9fzilQBaKWb6acKzJUPstf lJZYdPONXPmW+x4YC8CykCUdjRZB+JMKP6TUGlCWnMWWNMC/R7fgliQBUEO4153fkh0t 15dCpVnW1tc3lpla2OYSbbuV3O9kPqABtoWxwFlTyhscm7vPo9eWHyIPnsRdKvnXONhw kYGkYJsswuGA5FOxcYtrFwZ+K1eejViSk9uXGcPFYrXV5kOFr7ilnasCl3uD4alnNo5o vDHvNUaqIXqzUfED2peXVdarQhVA4LY8ES2yH5pY5V0geDOLSH+cdyCCsv4lGtMV6+l1 J/Dw== X-Gm-Message-State: AC+VfDz0kQuOk8ZFpTVAkjLcRMtDZTSdDLdN9PkQOZcXQyecacmyTQQi 5OdmdIo1cB99WXqPGqUcYlmXVQ== X-Google-Smtp-Source: ACHHUZ4e5cRbt4cxwX5emt+5fpWZHlvYcRSNhQa3SR8qnr5dS6GXOwY9LQ3zqH5O4WVGbRWW2wDCSw== X-Received: by 2002:a7b:c8d9:0:b0:3f4:1ce0:a606 with SMTP id f25-20020a7bc8d9000000b003f41ce0a606mr10206652wml.1.1684848392523; Tue, 23 May 2023 06:26:32 -0700 (PDT) Received: from localhost (host-213-179-129-39.customer.m-online.net. [213.179.129.39]) by smtp.gmail.com with ESMTPSA id m25-20020a7bcb99000000b003f195d540d9sm15044720wmi.14.2023.05.23.06.26.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 May 2023 06:26:31 -0700 (PDT) Date: Tue, 23 May 2023 15:26:30 +0200 From: Jiri Pirko To: Gavrilov Ilia Cc: "David S. Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vlad Yasevich , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "lvc-project@linuxtesting.org" Subject: Re: [PATCH net] ipv6: Fix out-of-bounds access in ipv6_find_tlv() Message-ID: References: <20230523082903.117626-1-Ilia.Gavrilov@infotecs.ru> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230523082903.117626-1-Ilia.Gavrilov@infotecs.ru> X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Tue, May 23, 2023 at 10:29:44AM CEST, Ilia.Gavrilov@infotecs.ru wrote: >optlen is fetched without checking whether there is more than one byte to parse. >It can lead to out-of-bounds access. > >Found by InfoTeCS on behalf of Linux Verification Center >(linuxtesting.org) with SVACE. > >Fixes: 3c73a0368e99 ("ipv6: Update ipv6 static library with newly needed functions") >Signed-off-by: Gavrilov Ilia Reviewed-by: Jiri Pirko