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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 52466C433DB for ; Sun, 7 Mar 2021 15:19:43 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 72574650FA for ; Sun, 7 Mar 2021 15:19:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 72574650FA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-20884-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 16065 invoked by uid 550); 7 Mar 2021 15:19:35 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 16031 invoked from network); 7 Mar 2021 15:19:34 -0000 IronPort-SDR: 93PtAdauRMH040cn5T0gDStgl08MzsOG9Yj8BKz9tgwCLL9OQxYO268K/+deyBRUoFte5EY06G IaMweN3Mhf+w== X-IronPort-AV: E=McAfee;i="6000,8403,9916"; a="167815709" X-IronPort-AV: E=Sophos;i="5.81,230,1610438400"; d="scan'208";a="167815709" IronPort-SDR: VBQ85G5YYI/WVTz2b41mxqzXqF0+ssZMx7MQbDyrg3QsWTdTEwQLosgUq9Ov6r51Cb94QFKhyQ E0ZQT8/IMYEw== X-IronPort-AV: E=Sophos;i="5.81,230,1610438400"; d="scan'208";a="409008502" Date: Sun, 7 Mar 2021 07:19:20 -0800 From: Andi Kleen To: John Wood Cc: Kees Cook , Jann Horn , Randy Dunlap , Jonathan Corbet , James Morris , Shuah Khan , "Serge E. Hallyn" , Greg Kroah-Hartman , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kselftest@vger.kernel.org, kernel-hardening@lists.openwall.com Subject: Re: [PATCH v5 7/8] Documentation: Add documentation for the Brute LSM Message-ID: <20210307151920.GR472138@tassilo.jf.intel.com> References: <20210227153013.6747-1-john.wood@gmx.com> <20210227153013.6747-8-john.wood@gmx.com> <878s78dnrm.fsf@linux.intel.com> <20210302183032.GA3049@ubuntu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210302183032.GA3049@ubuntu> Sorry for the late answer. I somehow missed your email earlier. > As a mitigation method, all the offending tasks involved in the attack are > killed. Or in other words, all the tasks that share the same statistics > (statistics showing a fast crash rate) are killed. So systemd will just restart the network daemon and then the attack works again? Or if it's a interactive login you log in again. I think it might be useful even with these limitations, but it would be good to spell out the limitations of the method more clearly. I suspect to be useful it'll likely need some user space configuration changes too. -Andi