Merge pull request #1532 from greenbone/mergify/bp/gvmd-20.08/pr-1530

Fix erroneous freeing of ical timezone component (backport #1530)

CHANGELOG.md

@@ -30,6 +30,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix "not regexp ..." filters [#1482](https://github.com/greenbone/gvmd/pull/1482)
 - Escape TLS certificate DNs that are invalid UTF-8 [#1486](https://github.com/greenbone/gvmd/pull/1486)
 - Free alert get data in report_content_for_alert [#1526](https://github.com/greenbone/gvmd/pull/1526) 
+- Fix erroneous freeing of ical timezone component [#1530](https://github.com/greenbone/gvmd/pull/1530)
 
 ### Removed
 

src/manage_utils.c

@@ -717,7 +717,7 @@ icalcomponent *
 icalendar_from_string (const char *ical_string, icaltimezone *zone,
                        gchar **error)
 {
-  icalcomponent *ical_new, *ical_parsed;
+  icalcomponent *ical_new, *ical_parsed, *timezone_component;
   icalproperty *error_prop;
   GString *warnings_buffer;
   int vevent_count = 0;
@@ -754,7 +754,9 @@ icalendar_from_string (const char *ical_string, icaltimezone *zone,
   icalcomponent_add_property (ical_new,
                               icalproperty_new_prodid (GVM_PRODID));
 
-  icalcomponent_add_component (ical_new, icaltimezone_get_component (zone));
+  timezone_component
+    = icalcomponent_new_clone (icaltimezone_get_component (zone));
+  icalcomponent_add_component (ical_new, timezone_component);
 
   switch (icalcomponent_isa (ical_parsed))
     {