The Visualization Analysis and Vulnerability Repair Research for the Module Dependency Managerial of VxWorks 5.5 Operating System

摘要

In the process of unloading the module under VxWorks5.5, the vulnerability existing in the module dependency management mechanism of this operating system allows the operator to carry out the unloading operation which violates the module dependency. It often causes serious software errors and even system downtime. In order to repair the vulnerability, firstly we make a visualization analysis of the module dependency management used the oriented graph and cross link list, secondly design the memory map, then invent a safe module-uninstall process based on the dependency management mechanism and we carry out the trial and verification. When unloading the module, the process can check module dependency at first and terminate the unloading operation violating the dependence, which finally repair the vulnerability effectively.