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<h1 id="extra-package-lkrg">Extra package: lkrg<a class="headerlink" href="#extra-package-lkrg" title="Permanent link">&para;</a></h1>
<h2 id="el9">EL9<a class="headerlink" href="#el9" title="Permanent link">&para;</a></h2>
<ul>
<li>Version <code>0.9.8-2.el9_4.security</code></li>
<li>Based on upstream version <code>0.9.8</code></li>
</ul>
<h2 id="el8">EL8<a class="headerlink" href="#el8" title="Permanent link">&para;</a></h2>
<ul>
<li>Version <code>0.9.8-1.el8_9.security</code></li>
<li>Based on upstream version <code>0.9.8</code></li>
</ul>
<h3 id="package-summary">Package summary<a class="headerlink" href="#package-summary" title="Permanent link">&para;</a></h3>
<p>LKRG, or Linux Kernel Runtime Guard, is a kernel module that performs runtime integrity checking of the Linux kernel and detection of security vulnerability exploits against the kernel.</p>
<p>More information is available on the <a href="https://lkrg.org">LKRG homepage</a> and in the documentation files included in the package.</p>
<h3 id="usage-in-rocky-linux">Usage in Rocky Linux<a class="headerlink" href="#usage-in-rocky-linux" title="Permanent link">&para;</a></h3>
<p>Due to EL's kABI stability and the <code>weak-modules</code> mechanism, which this package uses, the same binary package of LKRG usually works across different kernel revisions/builds within the same EL minor release (e.g., 9.4). Once there's a new minor release (e.g., 9.4 is upgraded to 9.5), we'll provide a new build of LKRG accordingly.</p>
<p>Installing the package does not automatically start LKRG nor enable it to start on system bootup. To start LKRG please use:</p>
<div class="highlight"><pre><span></span><code>systemctl start lkrg
</code></pre></div>
<p>To enable LKRG on bootup please use:</p>
<div class="highlight"><pre><span></span><code>systemctl enable lkrg
</code></pre></div>
<h3 id="testing-and-recovery">Testing and recovery<a class="headerlink" href="#testing-and-recovery" title="Permanent link">&para;</a></h3>
<p>Although the current package passed our own testing (on 9.4 and 8.9), we recommend that you only enable LKRG to start on system bootup after you've tested it for a while to ensure its compatibility with your system. If you nevertheless run into a boot time issue with LKRG later, you can disable it with the <code>nolkrg</code> kernel command-line option.</p>
<h3 id="remote-logging">Remote logging<a class="headerlink" href="#remote-logging" title="Permanent link">&para;</a></h3>
<p>LKRG includes a remote kernel message logging capability.
The corresponding userspace tools are found in the <code>lkrg-logger</code> sub-package.
Documentation is also included in there, in <code>/usr/share/doc/lkrg-logger/LOGGING</code>.</p>
<h3 id="change-log">Change log<a class="headerlink" href="#change-log" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code>* Wed May 22 2024 Solar Designer &lt;solar@openwall.com&gt; 0.9.8-2
- Pass direct kernel-devel&#39;s build path into make
- Drop &quot;BuildRequires: kernel&quot; as we no longer need /lib/modules/*/build
- Add &quot;BuildRequires: systemd&quot; for the _unitdir RPM macro (apparently this was
previously an indirect dependency via the kernel package)
* Tue Feb 27 2024 Solar Designer &lt;solar@openwall.com&gt; 0.9.8-1
- Update to 0.9.8
- Add logger sub-package
- Mark the sysctl configuration file config(noreplace)
- Use &quot;sort -V&quot; to build against the latest installed version of kernel-devel
* Wed Nov 8 2023 Solar Designer &lt;solar@openwall.com&gt; 0.9.7-4
- Add a couple of upstream patches, most notably to fix kINT false positives on
EL 8.8.
* Tue Oct 24 2023 Solar Designer &lt;solar@openwall.com&gt; 0.9.7-3
- Use weak-modules if available so that on RHEL and its rebuilds the same LKRG
package build works across different kABI-compatible kernel revisions/builds
- Drop 32-bit x86 from ExclusiveArch since recent RHEL lacks such kernel-devel
* Thu Sep 14 2023 Solar Designer &lt;solar@openwall.com&gt; 0.9.7-2
- Use kernel build directory corresponding to the kernel-devel package, not to
the currently running kernel
- &quot;BuildRequires: kernel&quot; for the /lib/modules/* directory
- &quot;BuildRequires: elfutils-libelf-devel&quot; to support CONFIG_UNWINDER_ORC=y
* Thu Sep 14 2023 Solar Designer &lt;solar@openwall.com&gt; 0.9.7-1
- Wrote this rough RPM spec file for Red Hat&#39;ish distros, seems to work fine on
RHEL 7, 8, 9 rebuilds, but is only reliable when there&#39;s exactly one
kernel-devel package installed at build time and it exactly matches the target
kernel version.
</code></pre></div>
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