Don't dereference idb_inf in wtap_dump_open_ng() when

[obnox/wireshark/wip.git] / wiretap / file_access.c

diff --git a/wiretap/file_access.c b/wiretap/file_access.c
index c600d65a37dc018c313fdaf325cb89d53841b29f..3d32cc85b039df9d0f9c32552c50dcde347b83b0 100644 (file)
--- a/wiretap/file_access.c
+++ b/wiretap/file_access.c
@@ -998,10 +998,15 @@ wtap_dumper* wtap_dump_open_ng(const char *filename, int filetype, int encap,
        /* Set Section Header Block data */
        wdh->shb_hdr = shb_hdr;
        /* Set Interface Description Block data */
-       wdh->number_of_interfaces       = idb_inf->number_of_interfaces;
-       wdh->interface_data                     = idb_inf->interface_data;
-       g_free(idb_inf);
-       
+       if (idb_inf != NULL) {
+               wdh->number_of_interfaces = idb_inf->number_of_interfaces;
+               wdh->interface_data = idb_inf->interface_data;
+               g_free(idb_inf);
+       } else {
+               wdh->number_of_interfaces= 0;
+               wdh->interface_data= NULL;
+       }
+
        /* "-" means stdout */
        if (strcmp(filename, "-") == 0) {
                if (compressed) {