From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Mon, 20 Nov 2017 11:02:44 +0000 (+0100)
Subject: rrd plugin: Fix writing of long values.
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=b637934677634886383916c417e1be148ee0c7ad;p=collectd.git

rrd plugin: Fix writing of long values.

The buffer provided for value_list_to_string() was not long enough to
fit a timestamp and a negative value using exponent and maximum
precision of the gauge format.

Signed-off-by: Florian Forster <octo@collectd.org>
---

diff --git a/src/rrdtool.c b/src/rrdtool.c
index 5f42561a..558b8005 100644
--- a/src/rrdtool.c
+++ b/src/rrdtool.c
@@ -803,7 +803,7 @@ static int rrd_write(const data_set_t *ds, const value_list_t *vl,
   if (value_list_to_filename(filename, sizeof(filename), vl) != 0)
     return -1;
 
-  char values[32 * ds->ds_num];
+  char values[32 * (ds->ds_num + 1)];
   if (value_list_to_string(values, sizeof(values), ds, vl) != 0)
     return -1;