From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Fri, 28 Sep 2018 12:55:20 +0000 (+0100)
Subject: [Minor] Fix dns errors reporting
X-Git-Tag: 1.8.1~140
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9a72b1c0335aafab334e7d43463db19c24057142;p=thirdparty%2Frspamd.git

[Minor] Fix dns errors reporting
---

diff --git a/src/lua/lua_dns_resolver.c b/src/lua/lua_dns_resolver.c
index 7c224243e9..061503f2d1 100644
--- a/src/lua/lua_dns_resolver.c
+++ b/src/lua/lua_dns_resolver.c
@@ -185,8 +185,12 @@ lua_dns_resolver_callback (struct rdns_reply *reply, gpointer arg)
 	lua_pushboolean (L, reply->authenticated);
 
 	if (lua_pcall (L, 6, 0, err_idx) != 0) {
-		msg_info_pool_check ("call to dns callback failed: %s", tb->str);
-		g_string_free (tb, TRUE);
+		tb = lua_touserdata (L, -1);
+
+		if (tb) {
+			msg_info_pool_check ("call to dns callback failed: %s", tb->str);
+			g_string_free (tb, TRUE);
+		}
 	}
 
 	lua_settop (L, err_idx - 1);