Worked on enhancing the reliability of the Zephyr4Microchip/zephyr codebase by addressing a critical crash scenario in core string handling. Focused on C programming and embedded systems, the developer implemented a targeted robustness fix that prevents NULL string pointer crashes during log packaging. By updating the append_string function to substitute "(null)" for NULL string inputs, the solution aligns logging behavior with glibc printf and improves post-incident diagnostics. This change mitigated the risk of SECURE_FAULT triggers on MMU-less and TF-M targets, decoupling crash sites from offending call sites and contributing to more stable and maintainable embedded software environments.