From: Eduardo Bragatto <eduardo@bragatto.com>
Date: Tue, 18 Nov 2014 08:30:03 +0000 (-0200)
Subject: Fixed overflow boundary for 32 bit counters
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cecba3f97fedbe2d69a302357ce25f61e2a881b0;p=thirdparty%2Frrdtool-1.x.git

Fixed overflow boundary for 32 bit counters
---

diff --git a/src/rrd_update.c b/src/rrd_update.c
index 9516cf7d..741e69dd 100644
--- a/src/rrd_update.c
+++ b/src/rrd_update.c
@@ -1072,7 +1072,7 @@ static int update_pdp_prep(
                          * ... are there any others in SNMP land?
                          */
                         if (pdp_new[ds_idx] < (double) 0.0)
-                            pdp_new[ds_idx] += (double) 4294967296.0;   /* 2^32 */
+                            pdp_new[ds_idx] += (double) 4294967295.0;   /* 2^32 - 1 */
                         if (pdp_new[ds_idx] < (double) 0.0)
                             pdp_new[ds_idx] += (double) 18446744069414584320.0; /* 2^64-2^32 */
                     }