From 7fe28f226cb86e9d339afb3c0e58ed02c84cd930 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20Czern=C3=BD?= <pczerny@opennebula.io>
Date: Wed, 4 Sep 2024 10:58:15 +0200
Subject: [PATCH] B #6694: Check error code of read function (#3208)

---
 include/Driver.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/Driver.h b/include/Driver.h
index 733c6750a5..88d2ad44eb 100644
--- a/include/Driver.h
+++ b/include/Driver.h
@@ -314,6 +314,12 @@ int Driver<MSG>
 
     rc = read(from_drv, (void *) buffer, sizeof(char) * 31);
 
+    if ( rc < 0 )
+    {
+        error = "Driver initialization failed, unable to read from driver\n";
+        return -1;
+    }
+
     buffer[rc]='\0';
 
     std::istringstream iss(buffer);
@@ -325,7 +331,7 @@ int Driver<MSG>
 
     if ( action != "INIT" || result != "SUCCESS" )
     {
-        error = "Driver initialization failed\n";
+        error = "Driver initialization failed, expected INIT SUCCESS message\n";
         return -1;
     }