Design
Smack consists of three components:
- A kernel module that is implemented as a Linux Security Module. It works best with file systems that support extended attributes.
- A startup script that ensures that device files have the correct Smack attributes and loads the Smack configuration.
- A set of patches to the GNU Core Utilities package to make it aware of Smack extended file attributes. A set of similar patches to Busybox were also created. SMACK does not require user-space support.
Read more about this topic: Simplified Mandatory Access Control Kernel
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