static void print_header()
{
    printf("%-9s %5s %10s %4s %9s %18s %9s %10s %s\n",
 "COMMAND",
 "PID",
 "USER",
 "FD",
 "TYPE",
 "DEVICE",
 "SIZE/OFF",
 "NODE",
 "NAME");
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.