This is a fork of the Linux kernel that includes an advanced security hardening module providing runtime protection against modern attack vectors through behavioral analysis and adaptive security controls.

• ML-powered syscall analysis using n-grams and Markov chains
• Real-time exploitation detection identifying unusual system call patterns
• Zero-day protection through behavioral analysis rather than signatures

• Time-based security policies restricting operations to specific windows
• Business hours enforcement preventing after-hours unauthorized access
• Maintenance window protection with elevated security outside approved times

• Cryptominer detection through CPU/GPU usage pattern analysis
• DoS attack prevention by identifying resource exhaustion attempts
• Process behavior baselining with deviation alerts

• Container escape prevention with namespace-aware controls
• Docker/Kubernetes integration for containerized workload protection
• Per-container security policies with different enforcement levels

• Dynamic threat response escalating from NORMAL → ELEVATED → HIGH → CRITICAL
• Automatic countermeasures based on detected threat severity
• Self-healing security posture that adapts to attack patterns

• ROP/JOP chain detection preventing code-reuse attacks
• Heap spray prevention blocking memory manipulation techniques
• Stack pivot detection identifying stack-based exploits
• W^X enforcement monitoring ensuring memory protection integrity

# Clone the repository
git clone https://github.com/yourusername/linux-hardened.git
cd linux-hardened

# Configure with hardening module enabled
make menuconfig
# Enable: Security options → Hardening Security Module

# Build the kernel
make -j$(nproc)
make modules_install
make install

# Quick VM test with pre-built kernel
./test-hardening-vm.sh

# Inside the VM, run built-in tests
test-behavior    # Test anomaly detection
test-temporal    # Test time-based controls
test-resource    # Test resource monitoring
test-container   # Test container security

echo 1 > /sys/kernel/security/hardening/enabled  # Enable
echo 0 > /sys/kernel/security/hardening/enabled  # Disable

echo 1 > /sys/kernel/security/hardening/enforce  # Block violations
echo 0 > /sys/kernel/security/hardening/enforce  # Monitor only

cat /sys/kernel/security/hardening/stats

# Detected: Rapid syscall patterns indicating exploitation
# Action: Process termination or syscall blocking

# Detected: Sustained high CPU with specific instruction patterns
# Action: Process throttling or termination

# Detected: Namespace violation attempts
# Action: Container isolation enforcement

# Detected: ROP gadget chains, heap sprays, stack pivots
# Action: Process termination and memory protection

• Minimal overhead: ~2-5% in normal operation
• Adaptive algorithms: Performance scales with threat level
• Efficient caching: Behavioral patterns cached for fast lookup
• Configurable thresholds: Tune sensitivity vs performance

CONFIG_SECURITY_HARDENING=y          # Enable module
CONFIG_HARDENING_BEHAVIORAL=y        # Behavioral detection
CONFIG_HARDENING_TEMPORAL=y          # Time-based controls
CONFIG_HARDENING_RESOURCE=y          # Resource monitoring
CONFIG_HARDENING_CONTAINER=y         # Container security
CONFIG_HARDENING_MEMORY_PROTECT=y    # Memory exploit detection

• Testing Guide - Detailed testing instructions
• Security Model - Technical implementation details
• API Reference - Sysfs interface documentation

We welcome contributions! Please see our Contributing Guidelines for details.

# Run test suite
./test-hardening-features.sh

# Check module logs
dmesg | grep hardening

# Debug mode
echo 1 > /sys/kernel/security/hardening/debug

This project maintains the same license as the Linux kernel (GPLv2). See COPYING for details.

Built upon the Linux kernel security subsystem with inspiration from:

• grsecurity/PaX for security hardening concepts
• RTKDSM for behavioral analysis approaches
• Modern EDR systems for adaptive security levels

This is an experimental security module. While it provides additional protection, it should be used as part of a comprehensive security strategy, not as a sole security measure.

Note: This module is under active development. Features and interfaces may change. Always test thoroughly before production deployment.