Fix segmentation fault (#6011)

* Fix segmentation fault

* Make system info printing safe

* Fix quotes for OS name

1 files changed, 26 insertions, 13 deletions

diff --git a/database/rrdhost.c b/database/rrdhost.c
index de0366267c..3b06ed1ada 100644
--- a/database/rrdhost.c
+++ b/database/rrdhost.c
@@ -825,19 +825,32 @@ struct rrdhost_system_info *rrdhost_system_info_dup(struct rrdhost_system_info *
     struct rrdhost_system_info *ret = callocz(1, sizeof(struct rrdhost_system_info));
 
     if(likely(system_info)) {
-        ret->os_name = strdupz(system_info->os_name);
-        ret->os_id = strdupz(system_info->os_id);
-        ret->os_id_like = strdupz(system_info->os_id_like);
-        ret->os_version = strdupz(system_info->os_version);
-        ret->os_version_id = strdupz(system_info->os_version_id);
-        ret->os_detection = strdupz(system_info->os_detection);
-        ret->kernel_name = strdupz(system_info->kernel_name);
-        ret->kernel_version = strdupz(system_info->kernel_version);
-        ret->architecture = strdupz(system_info->architecture);
-        ret->virtualization = strdupz(system_info->virtualization);
-        ret->virt_detection = strdupz(system_info->virt_detection);
-        ret->container = strdupz(system_info->container);
-        ret->container_detection = strdupz(system_info->container_detection);
+        if(system_info->os_name)
+            ret->os_name = strdupz(system_info->os_name);
+        if(system_info->os_id)
+            ret->os_id = strdupz(system_info->os_id);
+        if(system_info->os_id_like)
+            ret->os_id_like = strdupz(system_info->os_id_like);
+        if(system_info->os_version)
+            ret->os_version = strdupz(system_info->os_version);
+        if(system_info->os_version_id)
+            ret->os_version_id = strdupz(system_info->os_version_id);
+        if(system_info->os_detection)
+            ret->os_detection = strdupz(system_info->os_detection);
+        if(system_info->kernel_name)
+            ret->kernel_name = strdupz(system_info->kernel_name);
+        if(system_info->kernel_version)
+            ret->kernel_version = strdupz(system_info->kernel_version);
+        if(system_info->architecture)
+            ret->architecture = strdupz(system_info->architecture);
+        if(system_info->virtualization)
+            ret->virtualization = strdupz(system_info->virtualization);
+        if(system_info->virt_detection)
+            ret->virt_detection = strdupz(system_info->virt_detection);
+        if(system_info->container)
+            ret->container = strdupz(system_info->container);
+        if(system_info->container_detection)
+            ret->container_detection = strdupz(system_info->container_detection);
     }
 
     return ret;