stack-buffer-overflow in tvb get ipv4 addr with prefix len

stack-buffer-overflow in tvb get ipv4 addr with prefix len: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). AddressSanitizer: stack-buffer-overflow in function tvb get ipv4 addr with prefix len in file wireshark/epan/addr and mask.c