From nobody Tue Sep 16 11:12:04 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B635AC4708E for ; Wed, 4 Jan 2023 14:39:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239456AbjADOjS (ORCPT ); Wed, 4 Jan 2023 09:39:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239301AbjADOjM (ORCPT ); Wed, 4 Jan 2023 09:39:12 -0500 Received: from mail-ej1-x632.google.com (mail-ej1-x632.google.com [IPv6:2a00:1450:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F4E26167 for ; Wed, 4 Jan 2023 06:39:10 -0800 (PST) Received: by mail-ej1-x632.google.com with SMTP id tz12so83091307ejc.9 for ; Wed, 04 Jan 2023 06:39:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=CYYQgh/lv3T9poZ9Kbn1xfKKla/OcUPaY2NVZr8/1wI=; b=TPhzP6VDMUU3QtDkGKBz2ODkHY5IHPZJLk2AHghZRhDppkwIzHLh+ClSZSi7dOkdEO djNbFLbX/qbVhko5HtmYgh+KwUPHIj6YbIq8IfqKDrqPxZwEVo1ZnOcnm84WOikjUIXN 84Nn49z3bmZGZyGjFWM0g31CC5lEjul+7e7vQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=CYYQgh/lv3T9poZ9Kbn1xfKKla/OcUPaY2NVZr8/1wI=; b=4/5lzIax1ZRT/pm98zsO57kdRzz3uKB+Kw0fsLGOHHZa6PrPJgXAHLbyCDyiJNErm8 jkcrpB3f+BBJj8psFa6uRFB1yO08D3NhucCofMEBXG7+Qz6zonOB9aoWSk/j7mcseVLm 65r0rApw+ad4u5YprQLl+haiky1M5CVdaB/K1h0XsQIozLh+IZysYFie6c/iiTIPoKUb d5Cz2D6aEZUOafKgVDo+2jK3SGKEXCkJeh3t9SLnpiwfkrKYDTn092tCzBOwcVvFoMBo cLme7dItgzeJr0/ZdaUW9cJnNmwoLPPcD7rQD1I0WplsTawxy9G3Qbv2zc7H2myl5iQe vRyQ== X-Gm-Message-State: AFqh2kq0DjqVSqT5nshLilaCboBojsa3q+kXd/VlhmkonPlTGybpuV/M aTlJtfSAUOhafVNgx+m3AWo2HQ== X-Google-Smtp-Source: AMrXdXtBlcdrPW/OtLMuhlJIa8ITHBl4FnGqRj+b7buGekdJ2R0dm4D0Mgxm/adGoMtGVV+TmZF0UA== X-Received: by 2002:a17:906:5dd2:b0:7c1:7010:f413 with SMTP id p18-20020a1709065dd200b007c17010f413mr44805532ejv.19.1672843148794; Wed, 04 Jan 2023 06:39:08 -0800 (PST) Received: from alco.roam.corp.google.com ([2620:0:1059:10:a438:c7da:62e0:36f4]) by smtp.gmail.com with ESMTPSA id c8-20020a170906924800b0078de26f66b9sm15386659ejx.114.2023.01.04.06.39.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Jan 2023 06:39:08 -0800 (PST) From: Ricardo Ribalda Date: Wed, 04 Jan 2023 15:38:46 +0100 Subject: [PATCH v6 1/3] Documentation: sysctl: Correct kexec_load_disabled MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20221114-disable-kexec-reset-v6-1-6a8531a09b9a@chromium.org> References: <20221114-disable-kexec-reset-v6-0-6a8531a09b9a@chromium.org> In-Reply-To: <20221114-disable-kexec-reset-v6-0-6a8531a09b9a@chromium.org> To: Philipp Rudo , Eric Biederman , "Guilherme G. Piccoli" , Jonathan Corbet Cc: Ricardo Ribalda , linux-doc@vger.kernel.org, Sergey Senozhatsky , "Joel Fernandes (Google)" , Baoquan He , Petr Tesarik , kexec@lists.infradead.org, Bagas Sanjaya , Steven Rostedt , linux-kernel@vger.kernel.org, Ross Zwisler X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=1318; i=ribalda@chromium.org; h=from:subject:message-id; bh=2pZFS+1BHtUlFuNmvm1mTYxkgU9yharonO0OzNd1vYM=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjtY+EP67lwRrCO5L5k4Dp6xvXVoYkuhFXhgRbt/kG 8bQ+rx2JAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY7WPhAAKCRDRN9E+zzrEiEwYD/ 4usIWKfOuuGi8xYMQsTa952RC/Gqq3NLfoSqb13IPaxmQxqWWUjQ9uDtxl6QD90QnBoAjD/tSFebtK EapNZosQxrdc+t7axxND9uY17FhOJIKscuu90wrCExbOXav9p2pBlZVk1U8k/WwDAJrH5qMpt7pUvw pGRdxVE80sFSCeFSJCcuNrY0XeAYjO2cxzIuLxLSx7O9za8wFCZF4BMRohyc7tsSyl2EVdZYcemr0R 4z2XLsWYVQRXjtccMgFRkfCGOOmNW/hXVuV11qDDGyf5CSjfO9R7+6laH01SA3fF0Uk/E8Q+3LCu59 6F5RMHfOoXh38K58UOC8w/U2l5RjiRF2XC4yfmrobAdgnYqmutRHi+Lug8kNkWndLNlewOVKt3Cd63 wlBc/bMdd6ccRlzZ1pU8IMBsdVp1LCIUWq+IttQU61DODNb9Eatwj6wxBX8Qnhg0PvGrK8Cvsaamfp bYOMgQZU49QK2hsbc/aWhMe4mAt26NsDxp87ifiQjgWtpCkBYvj6Su8gg8VEAehX3Nl/1FxQA05HsT xSHhehNI5G5pHHslJ5HupPSSbvcOEZO5knYX2C0pCmWn3Gji43SAmKZSHJ3DE3zeUe5bJZlTJLZHBw XTSGECyozGv6ERamTopSA8x3YabJeqxtU79aXb9q9mYqfk5MxwYuXUKki4aw== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org kexec_load_disabled affects both ``kexec_load`` and ``kexec_file_load`` syscalls. Make it explicit. Reviewed-by: Steven Rostedt (Google) Signed-off-by: Ricardo Ribalda --- Documentation/admin-guide/sysctl/kernel.rst | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/ad= min-guide/sysctl/kernel.rst index 98d1b198b2b4..97394bd9d065 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -450,9 +450,10 @@ this allows system administrators to override the kexec_load_disabled =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =20 -A toggle indicating if the ``kexec_load`` syscall has been disabled. -This value defaults to 0 (false: ``kexec_load`` enabled), but can be -set to 1 (true: ``kexec_load`` disabled). +A toggle indicating if the syscalls ``kexec_load`` and +``kexec_file_load`` have been disabled. +This value defaults to 0 (false: ``kexec_*load`` enabled), but can be +set to 1 (true: ``kexec_*load`` disabled). Once true, kexec can no longer be used, and the toggle cannot be set back to false. This allows a kexec image to be loaded before disabling the syscall, --=20 2.39.0.314.g84b9a713c41-goog-b4-0.11.0-dev-696ae