From: Ricardo Ribalda <ribalda@chromium.org>
To: Philipp Rudo <prudo@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
Jonathan Corbet <corbet@lwn.net>,
"Guilherme G. Piccoli" <gpiccoli@igalia.com>
Cc: linux-doc@vger.kernel.org,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org,
"Joel Fernandes (Google)" <joel@joelfernandes.org>,
Ricardo Ribalda <ribalda@chromium.org>,
Ross Zwisler <zwisler@kernel.org>,
kexec@lists.infradead.org
Subject: [PATCH v3 1/3] Documentation: sysctl: Correct kexec_load_disabled
Date: Tue, 20 Dec 2022 23:05:43 +0100 [thread overview]
Message-ID: <20221114-disable-kexec-reset-v3-1-4ef4e929adf6@chromium.org> (raw)
In-Reply-To: <20221114-disable-kexec-reset-v3-0-4ef4e929adf6@chromium.org>
kexec_load_disabled affects both ``kexec_load`` and ``kexec_file_load``
syscalls. Make it explicit.
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
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,
--
2.39.0.314.g84b9a713c41-goog-b4-0.11.0-dev-696ae
next prev parent reply other threads:[~2022-12-20 22:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-20 22:05 [PATCH v3 0/3] kexec: Add new parameter to limit the access to kexec Ricardo Ribalda
2022-12-20 22:05 ` Ricardo Ribalda [this message]
2022-12-20 22:05 ` [PATCH v3 2/3] kexec: Factor out kexec_load_permitted Ricardo Ribalda
2022-12-20 22:05 ` [PATCH v3 3/3] kexec: Introduce parameters load_limit_reboot and load_limit_panic Ricardo Ribalda
2022-12-21 0:22 ` Steven Rostedt
2022-12-21 1:22 ` Ricardo Ribalda
2022-12-21 2:52 ` Steven Rostedt
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