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Thu, 08 Dec 2022 08:38:17 -0800 (PST) Received: from alco.roam.corp.google.com ([2a00:79e1:abd:5c00:8aae:c483:8219:bdba]) by smtp.gmail.com with ESMTPSA id ck3-20020a0564021c0300b0046778ce5fdfsm3569046edb.10.2022.12.08.08.38.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Dec 2022 08:38:17 -0800 (PST) From: Ricardo Ribalda Date: Thu, 08 Dec 2022 17:38:00 +0100 Subject: [PATCH v2 1/3] Documentation: sysctl: Correct kexec_load_disabled MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20221114-disable-kexec-reset-v2-1-c498313c1bb5@chromium.org> References: <20221114-disable-kexec-reset-v2-0-c498313c1bb5@chromium.org> In-Reply-To: <20221114-disable-kexec-reset-v2-0-c498313c1bb5@chromium.org> To: Philipp Rudo , Eric Biederman , Jonathan Corbet Cc: linux-doc@vger.kernel.org, Ricardo Ribalda , Steven Rostedt , "Joel Fernandes (Google)" , kexec@lists.infradead.org, Sergey Senozhatsky , Ross Zwisler , linux-kernel@vger.kernel.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; 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a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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. 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/admin-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 =================== -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, -- 2.39.0.rc0.267.gcb52ba06e7-goog-b4-0.11.0-dev-696ae