The Berkeley Packet Filter (BPF) allows users to write source code that can run in kernel space. The original intent of BPF was to allow users to filter incoming network packets at the kernel level, preventing the overhead cost of switching between user and kernel mode for filtering activities. Now BPF (also known as extended BPF) allows users to write BPF type programs in C to run in the kernel mode. These BPF programs utilize various datatypes and helper methods and can be compiled with a gcc type compiler. Companies such as Facebook are starting to use this extended BPF functionality which makes it a great target for a thorough project. Because these BPF programs run in kernel space, it is imperative that they be thoroughly tested for software vulnerabilities. I present a set of unique driver programs and program generators to help us run existing fuzzing tools on the BPF environment. Later I discuss the results and expand on future work and present ideas on how to improve fuzzers.
|Commitee:||Rubio González, Cindy, Bishop, Matt|
|School:||University of California, Davis|
|School Location:||United States -- California|
|Source:||MAI 82/2(E), Masters Abstracts International|
|Subjects:||Computer science, Information Technology, Computer Engineering|
|Keywords:||Berkeley Packet Filter, Fuzzing, Kernel level|
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