From: kevinshen <kevinshen@inspur.com>
Date: Thu, 7 Jul 2022 04:10:03 +0000 (+0800)
Subject: lib: check hostname in resolver_resolve
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=c6040d98b35f31b79864d8ab40493ef6f8273685;p=matthieu%2Ffrr.git

lib: check hostname in resolver_resolve

resolver_resolve should check hostname is null or not.

if ares_gethostbyname() get null hostname string, the hostname string will access a null pointer and crash.

Signed-off-by: kevinshen <kevinshen@inspur.com>
(cherry picked from commit 30220d1e35a92bbf3e6694d81b308630c7db27c3)
---

diff --git a/lib/resolver.c b/lib/resolver.c
old mode 100644
new mode 100755
index 29138bbc8d..b32e10d91d
--- a/lib/resolver.c
+++ b/lib/resolver.c
@@ -252,6 +252,9 @@ void resolver_resolve(struct resolver_query *query, int af, vrf_id_t vrf_id,
 {
 	int ret;
 
+	if (hostname == NULL)
+		return;
+
 	if (query->callback != NULL) {
 		flog_err(
 			EC_LIB_RESOLVER,