Fixed crash when st_info_list is NULL. Fixes dinhvh#420. Fixes CVE-20…

…22-4121.
dafanz · Dec 19, 2022 · 5c9eb6b · 5c9eb6b
1 parent 0c39020
commit 5c9eb6b
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/src/low-level/imap/mailimap_types.c b/src/low-level/imap/mailimap_types.c
@@ -1389,9 +1389,11 @@ void
 mailimap_mailbox_data_status_free(struct mailimap_mailbox_data_status * info)
 {
   mailimap_mailbox_free(info->st_mailbox);
-  clist_foreach(info->st_info_list, (clist_func) mailimap_status_info_free,
-		 NULL);
-  clist_free(info->st_info_list);
+  if (info->st_info_list != NULL) {
+    clist_foreach(info->st_info_list, (clist_func) mailimap_status_info_free,
+      NULL);
+    clist_free(info->st_info_list);
+  }
   free(info);
 }