From: Tomasz Ostrowski <43222462+tomek-o@users.noreply.github.com>
Date: Tue, 28 Mar 2023 14:36:01 +0000 (+0200)
Subject: [mod_enum] Fix use-after-free if creating resolver from file failed
X-Git-Tag: v1.10.10^2~93
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=afc8d78a1899ce02650a70d0f18192d5028466c7;p=thirdparty%2Ffreeswitch.git

[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 2908a1eb1e..aa87f24826 100644
--- 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);
 	}