[gnome-remote-desktop] settings: Don't leak credentials, when username or password is NULL

[Jonas Ådahl <jadahl src gnome org>]

commit 41d407a1888b84df71476b7e57ffebfce1a3679b
Author: Pascal Nowack <Pascal Nowack gmx de>
Date:   Fri Nov 26 15:41:07 2021 +0100

    settings: Don't leak credentials, when username or password is NULL
    
    While commit b17d0befe5e6d70466ac9d0110a6247499b92227 fixes a crash,
    when the username or password is NULL, it accidentally leaks the string
    with the credentials, which is in such case not NULL.
    
    Use the autofree- and autoptr- helpers to get rid of any leaks here.
    
    Fixes: b17d0befe5e6d70466ac9d0110a6247499b92227

 src/grd-settings.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)
---
diff --git a/src/grd-settings.c b/src/grd-settings.c
index 23b54bd..be4b4d3 100644
--- a/src/grd-settings.c
+++ b/src/grd-settings.c
@@ -138,8 +138,8 @@ grd_settings_get_rdp_username (GrdSettings  *settings,
                                GError      **error)
 {
   const char *test_password_override;
-  GVariant *credentials;
-  char *credentials_string;
+  g_autofree char *credentials_string = NULL;
+  g_autoptr (GVariant) credentials = NULL;
   char *username = NULL;
 
   test_password_override = g_getenv ("GNOME_REMOTE_DESKTOP_TEST_RDP_PASSWORD");
@@ -165,9 +165,6 @@ grd_settings_get_rdp_username (GrdSettings  *settings,
       return NULL;
     }
 
-  g_variant_unref (credentials);
-  g_free (credentials_string);
-
   return username;
 }
 
@@ -176,8 +173,8 @@ grd_settings_get_rdp_password (GrdSettings  *settings,
                                GError      **error)
 {
   const char *test_password_override;
-  GVariant *credentials;
-  char *credentials_string;
+  g_autofree char *credentials_string = NULL;
+  g_autoptr (GVariant) credentials = NULL;
   char *password = NULL;
 
   test_password_override = g_getenv ("GNOME_REMOTE_DESKTOP_TEST_RDP_PASSWORD");
@@ -203,9 +200,6 @@ grd_settings_get_rdp_password (GrdSettings  *settings,
       return NULL;
     }
 
-  g_variant_unref (credentials);
-  g_free (credentials_string);
-
   return password;
 }