Fix memory leak in base62_encode()

src/misc.c

@@ -121,10 +121,9 @@ unsigned long djb2_hash(const unsigned char *str)
 }
 
 // Function to encode a number to base62
-char *base62_encode(unsigned long num)
+void *base62_encode(unsigned long num, char *output)
 {
     const char base62_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
-    char *output = (char *) malloc(5); // 4 characters + null terminator
     if (output == NULL)
     {
         tio_error_print("Memory allocation failed");

src/misc.h

@@ -30,7 +30,7 @@ void delay(long ms);
 int ctrl_key_code(unsigned char key);
 bool regex_match(const char *string, const char *pattern);
 unsigned long djb2_hash(const unsigned char *str);
-char *base62_encode(unsigned long num);
+void *base62_encode(unsigned long num, char *output);
 int read_poll(int fd, void *data, size_t len, int timeout);
 double get_current_time(void);
 bool match_patterns(const char *string, const char *patterns);

src/tty.c

@@ -1735,7 +1735,8 @@ GList *tty_search_for_serial_devices(void)
 
         // Hash remaining string to get unique topology ID
         unsigned long hash = djb2_hash((const unsigned char *)devices_path);
-        char *tid = base62_encode(hash);
+        char tid[5];
+        base62_encode(hash, tid);
         free(devices_path);
 
         // Construct the path to the device's driver symlink