config: fix a memory leak

Author: IvanNardi

example/ndpiReader.c

@@ -254,6 +254,7 @@ static int dpdk_port_id = 0, dpdk_run_capture = 1;
 void test_lib(); /* Forward */
 
 extern void ndpi_report_payload_stats(FILE *out);
+extern int parse_proto_name_list(char *str, NDPI_PROTOCOL_BITMASK *bitmask, int inverted_logic);
 
 /* ********************************** */
 
@@ -930,9 +931,9 @@ int __add_cfg(char *proto, char *param, char *value, int dup)
     printf("Too many parameter! [num:%d/%d]\n", num_cfgs, MAX_NUM_CFGS);
     return -1;
   }
-  cfgs[num_cfgs].proto = ndpi_strdup(proto);
-  cfgs[num_cfgs].param = ndpi_strdup(param);
-  cfgs[num_cfgs].value = ndpi_strdup(value);
+  cfgs[num_cfgs].proto = dup ? ndpi_strdup(proto) : proto;
+  cfgs[num_cfgs].param = dup ? ndpi_strdup(param) : param;
+  cfgs[num_cfgs].value = dup ? ndpi_strdup(value) : value;
   num_cfgs++;
   return 0;
 }

fuzz/fuzz_readerutils_workflow.cpp

@@ -90,13 +90,14 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   if(w) {
     ndpi_set_config(w->ndpi_struct, NULL, "flow.track_payload.enable", "1");
     ndpi_set_config(w->ndpi_struct, NULL, "tcp_ack_payload_heuristic.enable", "1");
-    ndpi_finalize_initialization(w->ndpi_struct);
+    if(ndpi_finalize_initialization(w->ndpi_struct) != 0) {
 
-    header = NULL;
-    r = pcap_next_ex(pcap_handle, &header, &pkt);
-    while (r > 0) {
-      ndpi_workflow_process_packet(w, header, pkt, &flow_risk);
+      header = NULL;
       r = pcap_next_ex(pcap_handle, &header, &pkt);
+      while (r > 0) {
+        ndpi_workflow_process_packet(w, header, pkt, &flow_risk);
+        r = pcap_next_ex(pcap_handle, &header, &pkt);
+      }
     }
 
     ndpi_workflow_free(w);