tools/power/x86/intel-speed-select: Use null-terminated string

strlen() and strtok() takes null-termimated strings as input.
Make sure these strings are null-terminated before using them.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

tools/power/x86/intel-speed-select/isst-config.c

@@ -1583,6 +1583,7 @@ static int set_cpufreq_scaling_min_max_from_cpuinfo(int cpu, int cpuinfo_max, in
 	if (fd < 0)
 		return fd;
 
+	min_freq[15] = '\0';
 	len = strlen(min_freq);
 	ret = write(fd, min_freq, len);
 	if (ret == -1) {
@@ -2015,6 +2016,7 @@ static void set_fact_enable(int arg)
 			if (len < 0)
 				continue;
 
+			sibling_list[127] = '\0';
 			cpu_str = strtok(sibling_list, ",");
 			while (cpu_str != NULL) {
 				int cpu;