Add full automotive RTOS project

Add kernel (Cortex-M0/M3/M4, Tricore, S32K, RISC-V ports), drivers, middleware (CAN stack, diagnostics, safety), applications, board support, build/test tooling, and documentation.
2026-08-23 03:35:29 -04:00
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+## SECURITY.md
+
+```markdown
+# Security Policy
+
+## Supported Versions
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 1.0.x   | :white_check_mark: |
+| 0.9.x   | :white_check_mark: |
+| 0.5.x   | :x:                |
+| < 0.5   | :x:                |
+
+## Reporting a Vulnerability
+
+We take security seriously. If you discover a security vulnerability, please report it responsibly.
+
+### How to Report
+
+1. **Do NOT open a public issue**
+2. Email security@automotive-rtos.com
+3. Include detailed information
+4. Allow time for response
+
+### What to Include
+
+- Description of vulnerability
+- Steps to reproduce
+- Impact assessment
+- Suggested fix (if any)
+- Your contact information
+
+### Response Process
+
+1. **Acknowledgment** (within 24 hours)
+   - Confirm receipt
+   - Assign tracking number
+
+2. **Assessment** (within 72 hours)
+   - Verify vulnerability
+   - Determine severity
+   - Identify affected versions
+
+3. **Fix Development**
+   - Develop fix
+   - Test thoroughly
+   - Prepare release
+
+4. **Disclosure**
+   - Coordinate disclosure
+   - Release fix
+   - Publish advisory
+
+## Security Measures
+
+### Current Security Features
+
+- **Memory Protection**
+  - MPU support
+  - Stack overflow detection
+  - Heap protection
+
+- **Communication Security**
+  - E2E protection
+  - CRC validation
+  - Message authentication
+
+- **Access Control**
+  - Task isolation
+  - Privilege levels
+  - Resource protection
+
+- **Fault Handling**
+  - Fault detection
+  - Safe state management
+  - Error recovery
+
+### Security Best Practices
+
+1. **Configuration**
+   - Enable all security features
+   - Use secure defaults
+   - Regular security updates
+
+2. **Development**
+   - Follow secure coding guidelines
+   - Regular security audits
+   - Threat modeling
+
+3. **Deployment**
+   - Secure boot
+   - Firmware signing
+   - Secure updates
+
+## Security Considerations for Automotive
+
+### ISO 26262 Compliance
+
+- ASIL level support
+- Safety mechanisms
+- Redundancy options
+
+### Attack Surface
+
+- CAN bus attacks
+- Physical access
+- Firmware tampering
+- Side-channel attacks
+
+### Countermeasures
+
+- Secure boot
+- Message authentication
+- Intrusion detection
+- Secure key storage
+
+## Vulnerability Disclosure
+
+We follow responsible disclosure principles:
+
+1. Private reporting
+2. Coordinated fix
+3. Public disclosure
+4. Credit acknowledgment
+
+## Security Updates
+
+Security updates are released:
+
+- Critical: Immediate
+- High: Within 1 week
+- Medium: Within 2 weeks
+- Low: Next release
+
+## Contact
+
+- Email: security@automotive-rtos.com
+- PGP Key: [Download](https://automotive-rtos.com/pgp-key.asc)
+- Security Advisory: [View](https://automotive-rtos.com/security/advisories)
+
+## Acknowledgments
+
+We thank security researchers who responsibly disclose vulnerabilities:
+
+- Researcher Name - Vulnerability Description
+- Researcher Name - Vulnerability Description
+
+## License
+
+Security policy is part of the project license. See LICENSE file.