Systems software and correctness engineer focused on reproducible debugging, C/C++/Rust systems, compiler and GPU validation, firmware safety, and cryptographic differential-testing infrastructure.
pyudistira519@gmail.com · GitHub · LinkedIn
| Project | Problem | Contribution | Status | Evidence |
|---|---|---|---|---|
| Khronos Vulkan Validation Layers | Out-of-bounds crash in static descriptor validation | 6-line fix + 64-line C++ regression test | MERGED | PR #12743 |
| LLVM (AMDGPU) | TFE/LWE image loads entering SILoadStoreOptimizer merge candidates | 10-line guard + 35-line MIR regression | APPROVED, NOT MERGED | PR #210583 |
| Valkey | NULL dereference in event-loop timer handling | 1-line guard + regression test (verified fail-before/pass-after) | OPEN | PR #4353 |
| OpenSBI (RISC-V) | Unbounded copy into fixed firmware queue-name buffer | Length clamp + null termination | OPEN | PR #423 |
| MicroPython | Integer overflow in framebuffer pixel-index arithmetic on 16-bit int targets | 12 size_t casts in offset calculations |
OPEN | PR #19586 |
| Linux | Two comment typos in ftrace samples and tracing docs | Typo corrections | MERGED | e5d8524, 8a66c09 |
| bitcoin-core/secp256k1 | Missing constant-time test coverage for schnorrsig_sign_custom | Test-only ctime_tests.c extension |
UNDER REVIEW | PR #1893 |
Independent secp256k1 differential-testing research engine. Deterministic corpus, synthetic corrupted targets, failure minimization, replay, and structured reporting. 30 tests, 3 releases, active CI.
Local-first smart contract review infrastructure. Structured evidence packs, deterministic fixtures, privacy-preserving portable output. Extensive Python test suite, CI, 44 releases.
Research simulation exploring adaptive routing tradeoffs with Multi-Armed Bandit RL. 23.8% delivery ratio honestly documented alongside latency analysis.
Scoped systems debugging, regression-test development, C/C++/Rust correctness work, compiler and Vulkan investigations, cryptographic differential-testing integrations, and repository reproducibility rescue.
Contact for scoped engagement →
- ECC differential-testing adapter SDK
- Compiler and cryptographic test infrastructure
- Local-first review tooling
- Upstream LLVM and secp256k1 contributions