From: Florian Forster <octo@collectd.org>
Date: Fri, 1 Dec 2017 11:05:21 +0000 (+0100)
Subject: powerdns plugin: Ensure powerdns_get_data() returns a non-NULL buffer.
X-Git-Url: https://git.octo.it/?p=collectd.git;a=commitdiff_plain;h=5f676ef72a300ae4e8e979b4011cf7e3be505a6a;hp=ff59046e8694bde7f4b965a5f6e35ed325572c82

powerdns plugin: Ensure powerdns_get_data() returns a non-NULL buffer.

Coverity is concerned that if buffer is NULL, strtok_r() is called with
two NULL arguments, causing a NULL pointer dereference.

CID: 37968
---

diff --git a/src/powerdns.c b/src/powerdns.c
index f2149ef2..fa3eef33 100644
--- a/src/powerdns.c
+++ b/src/powerdns.c
@@ -598,6 +598,9 @@ static int powerdns_read_server(list_item_t *item) /* {{{ */
   status = powerdns_get_data(item, &buffer, &buffer_size);
   if (status != 0)
     return (-1);
+  if ((buffer == NULL) || (buffer_size == 0)) {
+    return EINVAL;
+  }
 
   if (item->fields_num != 0) {
     fields = (const char *const *)item->fields;