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Control Flow Integrity in the Linux Kernel
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- 1 Introduction
- 2 Agenda
- 3 Why should anyone care
- 4 Writing directly to kernel code
- 5 Writable and executable
- 6 Simplified view
- 7 Read only
- 8 Userspace
- 9 Attack Methods
- 10 Direct Function Calls
- 11 Indirect Function Calls
- 12 Backward Edge
- 13 Writable
- 14 Goal
- 15 Function Prototypes
- 16 Implementation with clang
- 17 Implementation without clang
- 18 Embedded function prototype
- 19 Improved speed
- 20 Shadow call stack
- 21 Shadow stack
- 22 Sign pointers
- 23 Getting it upstream
- 24 Where are we
- 25 How to do it
- 26 Live demo
- 27 Questions
- 28 How does CFI work with the kernel module
