fuzz - 12122 - Fix to memory leak by properly free'ing the dirname variable in OLE2 parser.

libclamav/ole2_extract.c

@@ -755,10 +755,16 @@ ole2_walk_property_tree(ole2_header_t *hdr, const char *dir, int32_t prop_index,
                             func_ret = ret;
                         } else {
                             ole2_list_delete(&node_list);
+                            if (dirname)
+                                free(dirname);
                             return ret;
                         }
                     }
                 }
+                if (dirname) {
+                    free(dirname);
+                    dirname = NULL;
+                }
                 if ((int)(prop_block[idx].prev) != -1) {
                     if ((ret = ole2_list_push(&node_list, prop_block[idx].prev)) != CL_SUCCESS) {
                         ole2_list_delete(&node_list);
@@ -771,8 +777,6 @@ ole2_walk_property_tree(ole2_header_t *hdr, const char *dir, int32_t prop_index,
                         return ret;
                     }
                 }
-                if (dirname)
-                    free(dirname);
                 break;
             default:
                 cli_dbgmsg("ERROR: unknown OLE2 entry type: %d\n", prop_block[idx].type);