static_bugs_todo.md

Static Analysis Bug Report

Generated on 2025-01-30 22:54:00

Memory Management Issues

• Memory leak in memory_used_in_group - Potential null pointer dereference
• Memory corruption in make_free_list - Uninitialized pointer usage
• Potential null pointer dereference in wxEvtHandler::TryHereOnly
• Uninitialized values in wnlib/conjdir/wnnlp.c:
  • Line 192, 382: Uninitialized value in compound assignment
  • Line 423: Uninitialized value in sum calculation
  • Line 428: Uninitialized value in function call
  • Line 432: Undefined value returned to caller
• Null pointer dereference in wnlib/mem/wnmemg.c:
  • Line 597: Null pointer dereference in big_blocks_tree access
  • Line 399: Garbage value comparison
• Memory safety in wnlib/mem/wnmem.c:
  • Line 414: Insecure strcpy usage
  • Line 452: Insecure sscanf usage
  • Line 474: Uninitialized value in function call
  • Line 953: Null pointer dereference

Uninitialized Variables

• Uninitialized value used in compound assignment in wnnlp.c:423
• Garbage value used in comparison in wnnlp.c:501
• Uninitialized diff variable in adjust_offsets function

Type Safety Issues

• Unsafe type casting in constraint handling code
• Potential integer overflow in size calculations
• Unsafe pointer arithmetic in memory management routines
• Cast to void* from smaller integer type in wnlib/mem/wnmemg.c:215

Resource Management

• Potential resource leak in file handling
• Memory not properly freed in error paths
• Possible double free in cleanup routines

Event Handling

• Race condition in event handler initialization
• Potential use-after-free in event dispatch
• Memory corruption in event queue management

Action Items

1. Review and fix all null pointer dereferences
2. Initialize all variables before use
3. Add bounds checking for array accesses
4. Implement proper error handling and cleanup
5. Add memory leak detection and prevention
6. Review all type casts for safety
7. Add input validation for all external data
8. Implement proper resource cleanup in error paths
9. Address uninitialized values in conjdir module
10. Fix null pointer dereferences in memory management
11. Replace unsafe string functions with bounds-checked alternatives
12. Clean up dead code
13. Update deprecated function declarations

Notes

• Priority should be given to memory corruption and null pointer issues
• Event handling issues may be causing the application crashes
• Consider adding static analysis to the CI/CD pipeline
• Document all fixes and add regression tests
• Multiple instances of insecure string handling functions (strcpy, strcat) in wxWidgets headers. These are third-party issues and not directly in our codebase.