Add packages/lkrg.md

docs/index.md

@@ -38,7 +38,7 @@ You'll normally install packages from the mirrors, which should just work. Howev
 
 ### Extra packages (for EL8 and EL9)
 
-- [lkrg](https://lkrg.org) (Linux Kernel Runtime Guard)
+- [lkrg](packages/lkrg.md) (Linux Kernel Runtime Guard)
 - [passwdqc](https://www.openwall.com/passwdqc/) (Password/passphrase strength checking and policy enforcement)
 
 ### Extra packages (currently only for EL9)

docs/packages/lkrg.md

@@ -0,0 +1,57 @@
+# Extra package: lkrg
+
+## EL8 and EL9
+
+- Version `lkrg-0.9.7-4.el9_2.security`
+- Based on upstream version `0.9.7`
+
+### Package summary
+
+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.
+
+More information is available on the [LKRG homepage](https://lkrg.org) and in the documentation files included in the package.
+
+### Usage in Rocky Linux
+
+Due to EL's kABI stability and the `weak-modules` mechanism, which this package uses, the same binary package of LKRG works across different kernel revisions/builds within the same EL minor release (e.g., 9.2). Once there's a new minor release (e.g., 9.2 is upgraded to 9.3), we'll provide a new build of LKRG accordingly.
+
+Installing the package does not automatically start LKRG nor enable it to start on system bootup. To start LKRG please use:
+
+```
+systemctl start lkrg
+```
+
+To enable LKRG on bootup please use:
+
+```
+systemctl enable lkrg
+```
+
+### Testing and recovery
+
+Although the current package passed our own testing (on 8.8 and 9.2), 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 `nolkrg` kernel command-line option.
+
+### Change log
+
+```
+* Wed Nov 08 2023 Solar Designer <solar@openwall.com> 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 <solar@openwall.com> 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 <solar@openwall.com> 0.9.7-2
+- Use kernel build directory corresponding to the kernel-devel package, not to
+the currently running kernel
+- "BuildRequires: kernel" for the /lib/modules/* directory
+- "BuildRequires: elfutils-libelf-devel" to support CONFIG_UNWINDER_ORC=y
+
+* Thu Sep 14 2023 Solar Designer <solar@openwall.com> 0.9.7-1
+- Wrote this rough RPM spec file for Red Hat'ish distros, seems to work fine on
+RHEL 7, 8, 9 rebuilds, but is only reliable when there's exactly one
+kernel-devel package installed at build time and it exactly matches the target
+kernel version.
+```