[mod_enum] Fix use-after-free if creating resolver from file failed

diff --git a/src/mod/applications/mod_enum/mod_enum.c b/src/mod/applications/mod_enum/mod_enum.c
index 2908a1eb1e942088b0e20f2c0f89c1679bc9898f..aa87f24826348346ebb1eb333b9401fb1d332e01 100644 (file)
--- a/src/mod/applications/mod_enum/mod_enum.c
+++ b/src/mod/applications/mod_enum/mod_enum.c
@@ -497,6 +497,7 @@ switch_status_t ldns_lookup(const char *number, const char *root, char *server_n
                /* create a new resolver from /etc/resolv.conf */
                if (res) {
                        ldns_resolver_free(res);
+                       res = NULL;
                }
                s = ldns_resolver_new_frm_file(&res, NULL);
        }