From 5b0de49bab071d109e3cebe00aab7a5510f5f13e Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@collectd.org>
Date: Thu, 18 Oct 2018 15:49:37 +0200
Subject: [PATCH] write_stackdriver plugin: Check pointer for NULL before
 dereferencing it.

---
 src/write_stackdriver.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/write_stackdriver.c b/src/write_stackdriver.c
index 9d06c250..421df2da 100644
--- a/src/write_stackdriver.c
+++ b/src/write_stackdriver.c
@@ -225,8 +225,10 @@ static int do_post(wg_callback_t *cb, char const *url, void const *payload,
 
   if (status != CURLE_OK) {
     ERROR("write_stackdriver plugin: POST %s failed: %s", url, cb->curl_errbuf);
-    sfree(ret_content->memory);
-    ret_content->size = 0;
+    if (ret_content != NULL) {
+      sfree(ret_content->memory);
+      ret_content->size = 0;
+    }
     return -1;
   }
 
-- 
2.11.0