July 2006
Intermediate to advanced
456 pages
9h 45m
English
Content preview from SELinux by Example: Using Security Enhanced LinuxBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 7. Constraints
In this chapter
• 7.1 Closer Look at the Access Decision Algorithm
• 7.3 Label Transition Constraints
SELinux provides a constraint mechanism to further restrict the access allowed by the policy regardless of the policy allow rules. In this chapter, we explore the constraint feature in SELinux.
7.1 A Closer Look at the Access Decision Algorithm
To understand the purpose of constraints, let’s revisit the SELinux Linux Security Module (LSM). Recall the SELinux kernel architecture discussed in Chapter 3, “Architecture,” the salient portion of which is depicted again in Figure 7-1.
Figure 7-1. Review of the SELinux LSM module
We want to take a closer look at how the access ...
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