Fix buffer overflow

ChangeLog

@@ -1,3 +1,9 @@
+2012-06-14  NOKUBI Takatsugu  <[email protected]>
+
+	* lib/chalib.c (chasen_sparse_main): 
+	fix buffer overflow 
+	JVN#16901583 https://jvn.jp/jp/JVN16901583/index.html
+
 2007-07-23  Asahara Masayuki  <[email protected]>
 
 	* lib/tokenizer.c (cha_tok_parse): 

lib/chalib.c

@@ -306,9 +306,14 @@ chasen_sparse_main(char *input, FILE *output)
      */
     while (*input) {
 	int c = 0, len, cursor;
-	if ((crlf = strpbrk(input, "\r\n")) == NULL)
+	if ((crlf = strpbrk(input, "\r\n")) == NULL) {
 	    len = strlen(input);
-	else {
+	    if (len >= CHA_INPUT_SIZE) {
+		len = CHA_INPUT_SIZE - 1;
+		crlf = input + CHA_INPUT_SIZE - 2;
+		c = 0;
+	    }
+	} else {
 	    len = crlf - input;
 	    c = *crlf;
 	    *crlf = '\0';