From add8eeceada4764e490ee024341175391ba2ab06 Mon Sep 17 00:00:00 2001
From: Nick Peng <pymumu@gmail.com>
Date: Wed, 28 Aug 2019 00:40:36 +0800
Subject: [PATCH] Fix crash issue caused by unknown http response

---
 src/dns_client.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/dns_client.c b/src/dns_client.c
index 712c161..8cb4a6a 100644
--- a/src/dns_client.c
+++ b/src/dns_client.c
@@ -1774,7 +1774,9 @@ static int _dns_client_process_tcp(struct dns_server_info *server_info, struct e
 
 				len = http_head_parse(http_head, (char *)server_info->recv_buff.data, server_info->recv_buff.len);
 				if (len < 0) {
+					tlog(TLOG_DEBUG, "remote server not supported.");
 					http_head_destroy(http_head);
+					http_head = NULL;
 					if (len == -1) {
 						break;
 					}