Tweaks on 19435 fix:

   * Raise limit: 16k isn't all that high.
   * Don't log when limit exceded; log later on.
   * Say "over" when we log more than we say we log.
   * Add target version to changes file

changes/bug19435

@@ -2,5 +2,5 @@
     - Fix an integer overflow in the rate-limiter that caused displaying of
       wrong number of suppressed messages (if there are too many of them).
       If the number of messages hits the limit of messages per interval the
-      rate-limiter drops a warning and doesn't count any further.
-      Fixes bug 19435.
+      rate-limiter doesn't count any further.
+      Fixes bug 19435; bugfix on 0.2.4.11-alpha.

src/common/util.c

@@ -1995,12 +1995,7 @@ rate_limit_is_ready(ratelim_t *lim, time_t now)
     lim->n_calls_since_last_time = 0;
     return res;
   } else {
-    if (lim->n_calls_since_last_time < RATELIM_TOOMANY) {
-      ++lim->n_calls_since_last_time;
-    } else if (lim->n_calls_since_last_time == RATELIM_TOOMANY) {
-      log_warn(LD_GENERAL,
-        "Enormously large number of messages (%d). It's probably a bug.",
-        RATELIM_TOOMANY);
+    if (lim->n_calls_since_last_time <= RATELIM_TOOMANY) {
       ++lim->n_calls_since_last_time;
     }
 
@@ -2020,11 +2015,12 @@ rate_limit_log(ratelim_t *lim, time_t now)
       return tor_strdup("");
     } else {
       char *cp=NULL;
+      const char *opt_over = (n >= RATELIM_TOOMANY) ? "over " : "";
       /* XXXX this is not exactly correct: the messages could have occurred
        * any time between the old value of lim->allowed and now. */
       tor_asprintf(&cp,
-                   " [%d similar message(s) suppressed in last %d seconds]",
-                   n-1, lim->rate);
+                   " [%s%d similar message(s) suppressed in last %d seconds]",
+                   opt_over, n-1, lim->rate);
       return cp;
     }
   } else {

src/common/util.h

@@ -292,7 +292,7 @@ typedef struct ratelim_t {
 } ratelim_t;
 
 #define RATELIM_INIT(r) { (r), 0, 0 }
-#define RATELIM_TOOMANY (16*1000)
+#define RATELIM_TOOMANY (16*1000*1000)
 
 char *rate_limit_log(ratelim_t *lim, time_t now);