From: Nick Mathewson <nickm@torproject.org>
Date: Fri, 16 Dec 2016 17:21:02 +0000 (-0500)
Subject: Resolve a division-by-zero complaint from coverity. CID 1397272
X-Git-Tag: tor-0.3.0.1-alpha~23
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23c09b6bc2897ada21de220c48799f01171dcdf4;p=thirdparty%2Ftor.git

Resolve a division-by-zero complaint from coverity. CID 1397272
---

diff --git a/src/or/entrynodes.c b/src/or/entrynodes.c
index 8715af7957..2e46aba02c 100644
--- a/src/or/entrynodes.c
+++ b/src/or/entrynodes.c
@@ -638,7 +638,8 @@ choose_guard_selection(const or_options_t *options,
   */
 
   static int have_warned_extreme_threshold = 0;
-  if (n_passing_filter < extreme_threshold &&
+  if (n_guards &&
+      n_passing_filter < extreme_threshold &&
       ! have_warned_extreme_threshold) {
     have_warned_extreme_threshold = 1;
     const double exclude_frac =