fix: string termination in sysctlbyname

Author: ohaiibuzzle

PlayTools/PlayLoader.m

@@ -61,7 +61,7 @@ static int pt_sysctl(int *name, u_int types, void *buf, size_t *size, void *arg0
 }
 
 static int pt_sysctlbyname(const char *name, void *oldp, size_t *oldlenp, void *newp, size_t newlen) {
-    if ((strcmp(name, "hw.machine") == 0) || (strcmp(name, "hw.product") == 0) || (strcmp(name, "hw.model") == 0)) {
+    if ((strcmp(name, "hw.product") == 0) || (strcmp(name, "hw.model") == 0)) {
         if (oldp == NULL) {
             int ret = sysctlbyname(name, oldp, oldlenp, newp, newlen);
             // We don't want to accidentally decrease it because the real sysctl call will ENOMEM
@@ -75,6 +75,7 @@ static int pt_sysctlbyname(const char *name, void *oldp, size_t *oldlenp, void *
             int ret = sysctlbyname(name, oldp, oldlenp, newp, newlen);
             const char *machine = DEVICE_MODEL;
             strncpy((char *)oldp, machine, strlen(machine));
+            ((char *)oldp)[strlen(machine)] = '\0';
             *oldlenp = strlen(machine) + 1;
             return ret;
         } else {
@@ -92,6 +93,7 @@ static int pt_sysctlbyname(const char *name, void *oldp, size_t *oldlenp, void *
             int ret = sysctlbyname(name, oldp, oldlenp, newp, newlen);
             const char *machine = OEM_ID;
             strncpy((char *)oldp, machine, strlen(machine));
+            ((char *)oldp)[strlen(machine)] = '\0';
             *oldlenp = strlen(machine) + 1;
             return ret;
         } else {