From d494beffd5fd92ff3659d9c99da172ebecc1bf3e Mon Sep 17 00:00:00 2001
From: Phillip Whelan <phil@calyptia.com>
Date: Fri, 9 Aug 2024 16:13:20 -0400
Subject: [PATCH] utils: validate allocation before filling with GUID on
 windows.

Signed-off-by: Phillip Whelan <phil@calyptia.com>
---
 src/flb_utils.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/flb_utils.c b/src/flb_utils.c
index 3761ad2cadc..7c287de05e4 100644
--- a/src/flb_utils.c
+++ b/src/flb_utils.c
@@ -1415,12 +1415,13 @@ int flb_utils_get_machine_id(char **out_id, size_t *out_size)
 
     if (status == ERROR_SUCCESS) {
         *out_id = flb_calloc(1, dwBufSize+1);
-        memcpy(*out_id, buf, dwBufSize);
 
         if (*out_id == NULL) {
             return -1;
         }
 
+        memcpy(*out_id, buf, dwBufSize);
+
         /* RegQueryValueEx sets dwBufSize to strlen()+1 for the NULL 
          * terminator, but we only need strlen(). */
         *out_size = dwBufSize-1;