There is a memory leak defect at line 352 in the file /masscan/src/in-report.c.

[LuMingYinDetect]

In the file /masscan/src/in-report.c, a pointer variable named der is defined at line 338 and a new dynamic memory area is allocated using the MALLOC function. After using the pointer der at line 352, the dynamically allocated memory area pointed to by der is not released, leading to a memory leak defect, as shown in the figure below:
https://github.com/LuMingYinDetect/masscan_defects/blob/main/masscan_1.png