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[80.71.134.83]) by smtp.gmail.com with ESMTPSA id f24-20020a056402005800b0046cbcc86bdesm7382008edu.7.2022.12.21.11.46.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Dec 2022 11:46:11 -0800 (PST) From: Ricardo Ribalda Date: Wed, 21 Dec 2022 20:45:57 +0100 Subject: [PATCH v5 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-v5-1-1bd37caf3c75@chromium.org> References: <20221114-disable-kexec-reset-v5-0-1bd37caf3c75@chromium.org> In-Reply-To: <20221114-disable-kexec-reset-v5-0-1bd37caf3c75@chromium.org> To: "Guilherme G. Piccoli" , Eric Biederman , Jonathan Corbet , Philipp Rudo Cc: Ross Zwisler , Sergey Senozhatsky , Steven Rostedt , kexec@lists.infradead.org, Ricardo Ribalda , "Joel Fernandes (Google)" , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=1258; i=ribalda@chromium.org; h=from:subject:message-id; bh=U6cVA0f3MVv7jTHbprLKEENRfx9C5MeH7N8/eIFjhzo=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjo2J7s4JnwPmuL15uZ+xM4QsaksUW5vucOTw7PXPE fZ88t7CJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY6NiewAKCRDRN9E+zzrEiDaJD/ 0bTQsbJRZ8Zw4ky/CUdrnkq+0uRbLoHVXu1ml36UHUihbFPSWbVefZ5p1bYmwIZmSzSEOemUBtbWdT eCmm343+ZRdig25r3HYVQIPjfZmV3J4KTW1CW2kJ/RYT7TV+eqt/2WIoUfoJ+caPbmQMSk2sX9JKNe iijWrC7+ouZanLCd/BxoBeKuuYxs23zGypKigm9U8VNs+DkSs81Bzs3scnfDafdqogSPF8hXbIbarZ oYujynTcfBNl3PXB6y3B6cJqOY/XAekyQrlGk2qzoIdtLj1ehxmNAcSQb9+iFt5B1oCkklY6C/E2XX Nasw1eCd8feM4nAnrK7M5JGDx676PMd/68QY1M1yPkv4/4eQei8ivJydAsQTcda25vtz6qRzt3oziG 5aPY9IuCSwEUB/A49HgpyPNeO3QQyjM/JRlwFsngYGpwhUoLjMHpkW2ic3AlmQyZz3dxm92CG0nH80 9HJmFnuxPGB1Zps0f8nXKPz8DHobHLJPNu8nwBs6F2O2o5m6u0I3dlHrcwLEQS1eG7KZWLLfA93nPc BGj1rKeM5vda3r4fqTGmqxUFj5yoH5KqsYwSG8iPQfUQMSVO07eiyfXsDi2RZdrO8JPAG/120gdoY1 Tqqx7ihn4UKRARwU+N4J0xr0tgvT6t1e8J1doKvNiEfsUHBHmrvedZ9miHuw== 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. 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