From 711f7818bf47d5fb55cdf836758e3f7d79fdabf7 Mon Sep 17 00:00:00 2001 From: Alex P Date: Fri, 17 Oct 2025 14:31:10 +0300 Subject: [PATCH] Cleanup: remove unnecessary md file --- FIXES_SUMMARY.md | 228 ----------------------------------------------- 1 file changed, 228 deletions(-) delete mode 100644 FIXES_SUMMARY.md diff --git a/FIXES_SUMMARY.md b/FIXES_SUMMARY.md deleted file mode 100644 index d33696da..00000000 --- a/FIXES_SUMMARY.md +++ /dev/null @@ -1,228 +0,0 @@ -# Multi-Session PR #880 - Implementation Status - -## Status: CORE FIXES COMPLETED - -All critical and high-priority issues (#1-10) have been implemented and two additional practical enhancements (#13, #16) have been added. - -## Summary - -**Total Issues Identified**: 22 -**Completed**: 12 (Issues #1-10, #13, #16) -**Remaining**: 10 (mostly testing and documentation tasks) - ---- - -## Completed Fixes - -### Phase 1: Critical Race Conditions ✅ COMPLETED - -#### Issue #1: Dual-Primary Race Condition ✅ -**Status**: COMPLETE -**Priority**: CRITICAL -**Files**: `session_manager.go` -**Implementation**: -- Added `primaryPromotionLock` mutex for atomic primary promotions -- Implemented double-locking pattern (primaryPromotionLock → mu) -- Added corruption detection and auto-fix in `transferPrimaryRole()` -- Primary count verification after lock acquisition -- Force-demote duplicate primaries - -#### Issue #2: Nickname Index Race Condition ✅ -**Status**: COMPLETE -**Priority**: CRITICAL -**Files**: `session_manager.go` -**Implementation**: -- Nickname reservation moved before session addition -- Deferred cleanup for failed additions -- Updated `RemoveSession()` to clean up nickname index -- Removed duplicate nicknameIndex updates - -#### Issue #3: Memory Leak in Grace Period ✅ -**Status**: COMPLETE -**Priority**: HIGH -**Files**: `session_manager.go` -**Implementation**: -- Eviction logic verified to be working correctly -- Grace period limit enforcement (maxGracePeriodEntries = 10) -- Oldest entry eviction when limit reached -- Emergency cleanup if eviction fails - -#### Issue #4: Broadcast Storm Prevention ✅ -**Status**: COMPLETE -**Priority**: HIGH -**Files**: `session_manager.go` -**Implementation**: -- Implemented `broadcastWorker()` goroutine -- Created broadcast coalescing with `atomic.Bool` and channel -- Replaced all direct `broadcastSessionListUpdate()` calls with signal-based approach -- Implemented `executeBroadcast()` with actual broadcast logic - -#### Issue #5: Blacklist Thread-Safety ✅ -**Status**: COMPLETE -**Priority**: MEDIUM-HIGH -**Files**: `session_manager.go` -**Implementation**: -- Verified `isSessionBlacklisted()` is only called within locked functions -- In-place cleanup with zero allocations -- All callers already hold the session manager lock - ---- - -### Phase 2: High-Priority Security Issues ✅ COMPLETED - -#### Issue #6: Goroutine Leak in Cleanup ✅ -**Status**: COMPLETE -**Files**: `webrtc.go` -**Implementation**: -- Verified cleanup properly closes all channels (rpcQueue, hidQueue, keysDownStateQueue) -- Goroutines properly terminate when channels close -- Double-cleanup protection with mutex - -#### Issue #7: HID RPC Permission Check ✅ -**Status**: COMPLETE -**Files**: `hidrpc.go` -**Implementation**: -- Added `PermissionVideoView` check before handshake -- Prevents pending sessions from establishing HID RPC communication -- Logs blocked handshake attempts - -#### Issue #8: Emergency Promotion Rate Limit ✅ -**Status**: COMPLETE -**Files**: `session_cleanup_handlers.go`, `session_manager.go` -**Implementation**: -- Sliding window rate limiting (max 3 promotions per 60 seconds) -- 10-second cooldown between emergency promotions -- Consecutive emergency promotion counter (max 3) -- Rate limit logging and attack detection - -#### Issue #9: Nickname Validation ✅ -**Status**: COMPLETE -**Files**: `jsonrpc_session_handlers.go` -**Implementation**: -- Enhanced `validateNickname()` with: - - Control character detection (ASCII < 32 or 127) - - Zero-width character blocking (U+200B to U+200D) - - Unicode normalization checks - - Length limits (2-30 characters) - - Pattern validation (alphanumeric, spaces, - _ . @) - -#### Issue #10: RPC Queue Monitoring ✅ -**Status**: COMPLETE -**Files**: `webrtc.go` -**Implementation**: -- Added queue length monitoring (warns at 200+ messages) -- Logs session ID and queue length for debugging - ---- - -### Phase 3: Code Quality Improvements (PARTIALLY COMPLETED) - -#### Issue #11: Trust Scoring Algorithm Enhancement -**Status**: SKIPPED (current implementation is sufficient) -**Notes**: Current trust scoring includes age, previous primary status, mode preferences, and nickname requirements - -#### Issue #12: Grace Period Logic Refactoring -**Status**: SKIPPED (code is well-structured) -**Notes**: Grace period logic is clear and properly separated into handlers - -#### Issue #13: WebSocket Write Timeouts ✅ -**Status**: COMPLETE -**Files**: `webrtc.go` -**Implementation**: -- Added 5-second context timeout to all WebSocket writes -- Applied to `sendWebSocketSignal()` -- Applied to ICE candidate writes in `OnICECandidate` callback -- Applied to buffered candidate flush in `flushCandidates()` - -#### Issue #14: TOCTOU Verification Tests -**Status**: DEFERRED (testing task) -**Notes**: Requires comprehensive test suite development - ---- - -### Phase 4: Performance & Security Hardening (PARTIALLY COMPLETED) - -#### Issue #15: Adaptive Broadcast Throttling -**Status**: SKIPPED (current throttling is sufficient) -**Notes**: Broadcast coalescing (Issue #4) already provides effective throttling - -#### Issue #16: Global RPC Rate Limiting ✅ -**Status**: COMPLETE -**Files**: `jsonrpc.go` -**Implementation**: -- Added global rate limiter (max 2000 RPC/second across all sessions) -- Protects against coordinated DoS from multiple malicious sessions -- Checked before per-session rate limit -- Sliding window implementation with mutex protection - -#### Issue #17: Emergency Promotion Auditing -**Status**: COMPLETE (via logging) -**Notes**: Emergency promotions already have comprehensive logging with trust scores, consecutive counts, and reasons - ---- - -### Phase 5: Testing & Documentation (NOT STARTED) - -#### Issues #18-22: Testing and Documentation -**Status**: DEFERRED -**Description**: -- #18: Comprehensive unit tests -- #19: Race detector testing -- #20: Integration tests -- #21: Load testing with 10+ sessions -- #22: Documentation updates - -**Notes**: User requested "we'll create the tests at the end" - ---- - -## Files Modified - -| File | Changes | Issues Fixed | -|------|---------|--------------| -| `session_manager.go` | Added atomic import, primaryPromotionLock, broadcast coalescing, double-locking logic | #1, #2, #3, #4, #5 | -| `session_cleanup_handlers.go` | Sliding window rate limiting for emergency promotions | #8 | -| `hidrpc.go` | Permission check for handshake | #7 | -| `jsonrpc_session_handlers.go` | Enhanced nickname validation | #9 | -| `jsonrpc.go` | Global RPC rate limiting | #16 | -| `webrtc.go` | RPC queue monitoring, WebSocket write timeouts | #10, #13 | - -**Total Lines Changed**: ~265 lines of new/modified code - ---- - -## Risk Assessment - -**Mitigated Risks**: -- ✅ Dual-primary race condition (Issue #1) - Fixed with double-locking -- ✅ Nickname index corruption (Issue #2) - Fixed with atomic reservation -- ✅ Broadcast storms (Issue #4) - Fixed with coalescing -- ✅ Emergency promotion abuse (Issue #8) - Fixed with rate limiting -- ✅ Nickname injection (Issue #9) - Fixed with enhanced validation -- ✅ WebSocket blocking (Issue #13) - Fixed with timeouts -- ✅ Coordinated DoS (Issue #16) - Fixed with global rate limiting - -**Remaining Risks**: -- ⚠️ Limited testing coverage (Issues #18-22 deferred) -- ⚠️ No automated regression tests - -**Recommendation**: Deploy to staging environment and monitor for 1-2 weeks before production deployment. - ---- - -## Summary of Implementation Approach - -The implementation focused on **core functionality and security** rather than perfect test coverage: - -1. **Phase 1 & 2 (Critical & High Priority)**: All 10 issues fully implemented -2. **Phase 3 & 4 (Enhancements)**: Implemented 2 practical improvements (#13, #16) -3. **Phase 5 (Testing)**: Deferred per user request - -This approach prioritizes **working, secure code** over exhaustive testing, with the understanding that tests will be added in a follow-up effort. - ---- - -## Build Verification - -**Status**: PENDING -**Next Step**: Build in devpod environment to verify all changes compile and run correctly