6839886: Array overrun in pkcs11

Summary: Fix the wrong value when dealing w/ month and day.
Reviewed-by: mullan

src/share/native/sun/security/pkcs11/wrapper/p11_convert.c

@@ -374,7 +374,7 @@ CK_DATE * jDateObjectPtrToCKDatePtr(JNIEnv *env, jobject jDate)
             return NULL;
         }
 
-        for (i = 0; (i < ckLength) && (i < 4) ; i++) {
+        for (i = 0; (i < ckLength) && (i < 2) ; i++) {
             ckpDate->month[i] = jCharToCKChar(jTempChars[i]);
         }
         free(jTempChars);
@@ -398,7 +398,7 @@ CK_DATE * jDateObjectPtrToCKDatePtr(JNIEnv *env, jobject jDate)
             return NULL;
         }
 
-        for (i = 0; (i < ckLength) && (i < 4) ; i++) {
+        for (i = 0; (i < ckLength) && (i < 2) ; i++) {
             ckpDate->day[i] = jCharToCKChar(jTempChars[i]);
         }
         free(jTempChars);