[PATCH 1/3] authz-list-file: Fix crash when filename is not set

[Eduardo Habkost]

Fix the following crash:

  $ qemu-system-x86_64 -object authz-list-file,id=obj0
  qemu-system-x86_64: -object authz-list-file,id=obj0: GLib: 
g_file_get_contents: assertion 'filename != NULL' failed
  Segmentation fault (core dumped)

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
Cc: "Daniel P. Berrangé" <berrange@redhat.com>
Cc: qemu-devel@nongnu.org
---
 authz/listfile.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/authz/listfile.c b/authz/listfile.c
index cd6163aa40..aaf930453d 100644
--- a/authz/listfile.c
+++ b/authz/listfile.c
@@ -122,6 +122,11 @@ qauthz_list_file_complete(UserCreatable *uc, Error **errp)
     QAuthZListFile *fauthz = QAUTHZ_LIST_FILE(uc);
     gchar *dir = NULL, *file = NULL;
 
+    if (!fauthz->filename) {
+        error_setg(errp, "filename not provided");
+        return;
+    }
+
     fauthz->list = qauthz_list_file_load(fauthz, errp);
 
     if (!fauthz->refresh) {
-- 
2.26.2