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=-14.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable 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 9FC33C4707F for ; Thu, 27 May 2021 07:14:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DED5613D4 for ; Thu, 27 May 2021 07:14:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235060AbhE0HPb (ORCPT ); Thu, 27 May 2021 03:15:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234956AbhE0HPI (ORCPT ); Thu, 27 May 2021 03:15:08 -0400 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 A872FC061763; Thu, 27 May 2021 00:13:35 -0700 (PDT) Received: by mail-wm1-x331.google.com with SMTP id f75-20020a1c1f4e0000b0290171001e7329so1853599wmf.1; Thu, 27 May 2021 00:13:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=K62CfcBuMRBnrDkS+CG8hEhaiH/WcvIci8e5GDvgm7s=; b=HvijR3W1L0ZzTAxCwllEY1xANIBnrWpNre6IpMeXwqqIIFLxDNrQCjMHyGs1w1xiiv Sf/2DbwO/S07xVKduTs94pH2x+gKcVcYVkLcv/W6bVef4a7FvS6LDwLHaZwseuV0mYFV retOkZPVAFEPf++avnafjgiAxcq1hOU8srJXVABXQAJFk7vU9dBoOycXrqVFIez147qq vGcipQTytdf0UfLb/NRR9eGYlO8/HsYP8YVa5a3aAeDdfH+6+7bbJFURfp7wzpP2iz94 4SVghPBsLdzIAi5m5V4L3Tw7jjX3Oc+CMWGZEuDSqi4TT83NCOTAEOkNVA5UXVhAvkD7 k+SA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:to:cc:references:from:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=K62CfcBuMRBnrDkS+CG8hEhaiH/WcvIci8e5GDvgm7s=; b=Q1mMKJ1yVPxYETwTFEloyeCyDYNwBWcNnoTwjlYs+Jmhv36KHIFK7yplnjUmZGynTd vXQsK0vfBX2TYlP/G3oBx0e42MDPO7GTEyHY1SLlbBK2NMvqsgLFzM9NW9s/+QI4SQ7F vVPKg8/33c4dSI8tcEX1tWrqVyW8XMtnObZD4IZI5VHYyQb3gda7JlLvhxKt62JZupRB sOntvgbPYJSW16MWryt41eKDL+rN+3VBQoElJrVMv4HrNVRLDSPm9eJMh7Zrkoan5aRK SVAUrnDqr6EQJJZpz2RJUhfz16Z310KuWQNHSuixTdOTtO7aWL+eWjWu6xkxAF1p/yfa JviA== X-Gm-Message-State: AOAM5309XSmyyrb20+QzZNicia3Yjc713yAr+eNlf8BP0KAeRfJxy/o5 BNtA3TqC8w8fc2TKYVVtkBwoXT7nosI= X-Google-Smtp-Source: ABdhPJzlIB4c8wjL+Ah7p9anyymZ97UNHnF0+N1tqrdVsvJdjNpaOOJXn+2ojTJb2oTL7nCRw0rXDg== X-Received: by 2002:a7b:cd9a:: with SMTP id y26mr6940605wmj.133.1622099614272; Thu, 27 May 2021 00:13:34 -0700 (PDT) Received: from [10.8.0.106] ([195.53.121.100]) by smtp.gmail.com with ESMTPSA id l16sm10296211wmj.47.2021.05.27.00.13.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 May 2021 00:13:33 -0700 (PDT) Sender: Alejandro Colomar Subject: Re: [PATCH] kernel_lockdown.7: Remove description of lifting via SysRq (not upstream) To: dann frazier Cc: linux-kernel@vger.kernel.org, Pedro Principeza , David Howells , Heinrich Schuchardt , Michael Kerrisk , linux-man@vger.kernel.org References: <20210526173455.971103-1-dann.frazier@canonical.com> From: "Alejandro Colomar (man-pages)" Message-ID: <7c25c60b-f1d0-be71-8a7d-f2cb1871daeb@gmail.com> Date: Thu, 27 May 2021 09:13:31 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: <20210526173455.971103-1-dann.frazier@canonical.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Dann, On 5/26/21 7:34 PM, dann frazier wrote: > The patch that implemented lockdown lifting via SysRq ended up getting > dropped[*] before the feature was merged upstream. Having the feature > documented but unsupported has caused some confusion for our users. > > [*] http://archive.lwn.net:8080/linux-kernel/CACdnJuuxAM06TcnczOA6NwxhnmQUeqqm3Ma8btukZpuCS+dOqg@mail.gmail.com/ > > Signed-off-by: dann frazier Patch applied. Thanks, Alex > --- > man7/kernel_lockdown.7 | 6 ------ > 1 file changed, 6 deletions(-) > > diff --git a/man7/kernel_lockdown.7 b/man7/kernel_lockdown.7 > index 30863de62..29ffd55c3 100644 > --- a/man7/kernel_lockdown.7 > +++ b/man7/kernel_lockdown.7 > @@ -33,12 +33,6 @@ where X indicates the process name and Y indicates what is restricted. > .PP > On an EFI-enabled x86 or arm64 machine, lockdown will be automatically enabled > if the system boots in EFI Secure Boot mode. > -.PP > -If the kernel is appropriately configured, lockdown may be lifted by typing > -the appropriate sequence on a directly attached physical keyboard. > -For x86 machines, this is > -.IR SysRq+x . > -.\" > .SS Coverage > When lockdown is in effect, a number of features are disabled or have their > use restricted. > -- Alejandro Colomar Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/ http://www.alejandro-colomar.es/