scenarios to Apply Custom SELinux Policy on CentOS 8 with 'Invalid Context' scenarios
After trying multiple solutions online, I still can't figure this out. I'm trying to apply a custom SELinux policy on my CentOS 8 server to allow a specific application to access certain files, but I'm hitting a wall. After creating the policy module using the `checkmodule` and `semodule_package` commands, I run `semodule -i my_custom_policy.pp`, and it gives me the following behavior: `libsemanage.semanage_import_active: Invalid context`. Here's the relevant portion of the policy I created: ```plaintext module my_custom_policy 1.0; require { type httpd_t; type my_app_t; class file { read write }; } # Allow my_app_t to read and write to files labeled with httpd_t allow my_app_t httpd_t:file { read write }; ``` I've double-checked the types using `semanage fcontext -l | grep httpd_t` and `semanage fcontext -l | grep my_app_t`, and they seem fine. I also made sure to have the `policycoreutils` and `selinux-policy-devel` packages installed. Still, I'm exploring. When I try to load the module, I get the invalid context behavior, which suggests there might be something wrong with the way I've defined the types or the context in the policy. I tried running `sepolicy generate --level` to check the contexts in use, but it doesn't seem to help clarify the scenario. Any thoughts on what might be going wrong here or what I could check next? Am I missing something obvious?