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106 lines
2.8 KiB
Text
106 lines
2.8 KiB
Text
---
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title: About the kernel_module Resource
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---
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# kernel_module
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Use the `kernel_module` InSpec audit resource to test kernel modules on Linux
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platforms. These parameters are located under `/lib/modules`. Any submodule may
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be tested using this resource.
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The `kernel_module` resource can also verify if a kernel module is `blacklisted`
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or if a module is disabled via a fake install using the `bin_true` or `bin_false`
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method.
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<br>
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## Syntax
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A `kernel_module` resource block declares a module name, and then tests if that
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module is a loadable kernel module, if it is enabled, disabled or if it is
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blacklisted:
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describe kernel_module('module_name') do
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it { should be_loaded }
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it { should_not be_disabled }
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it { should_not be_blacklisted }
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end
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where
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* `'module_name'` must specify a kernel module, such as `'bridge'`
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* `{ should be_loaded }` tests if the module is a loadable kernel module
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* `{ should be_blacklisted }` tests if the module is blacklisted or if the module is disabled via a fake install using /bin/false or /bin/true
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* `{ should be_disabled }` tests if the module is disabled via a fake install using /bin/false or /bin/true
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<br>
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## Examples
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The following examples show how to use this InSpec audit resource.
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### Test a modules 'version'
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describe kernel_module('bridge') do
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it { should be_loaded }
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its(:version) { should cmp >= '2.2.2' }
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end
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### Test if a module is loaded, not disabled and not blacklisted
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describe kernel_module('video') do
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it { should be_loaded }
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it { should_not be_disabled }
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it { should_not be_blacklisted }
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end
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### Check if a module is blacklisted
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describe kernel_module('floppy') do
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it { should be_blacklisted }
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end
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### Ensure a module is *not* blacklisted and it is loaded
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describe kernel_module('video') do
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it { should_not be_blacklisted }
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it { should be_loaded }
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end
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### Ensure a module is disabled via 'bin_false'
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describe kernel_module('sstfb') do
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it { should_not be_loaded }
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it { should be_disabled }
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end
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### Ensure a module is 'blacklisted'/'disabled' via 'bin_true'
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describe kernel_module('nvidiafb') do
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it { should_not be_loaded }
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it { should be_blacklisted }
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end
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### Ensure a module is not loaded
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describe kernel_module('dhcp') do
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it { should_not be_loaded }
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end
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<br>
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## Matchers
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For a full list of available matchers please visit our [matchers page](https://www.inspec.io/docs/reference/matchers/).
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### be_loaded
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The `be_loaded` matcher tests if the module is a loadable kernel module:
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it { should be_loaded }
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### version
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The `version` matcher tests if the named module version is on the system:
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its(:version) { should eq '3.2.2' }
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