From 64decd48e20f6d20d6f510aa75ab05861fd3d51c Mon Sep 17 00:00:00 2001
From: icy17 <39425646+icy17@users.noreply.github.com>
Date: Mon, 29 Apr 2024 13:51:22 +0800
Subject: [PATCH] Fix potential Null pointer dereference in dns-example.c
 (#1601)

---
 sample/dns-example.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sample/dns-example.c b/sample/dns-example.c
index 87221fdc..7d874ac1 100644
--- a/sample/dns-example.c
+++ b/sample/dns-example.c
@@ -196,7 +196,17 @@ main(int c, char **v) {
 #endif
 
 	event_base = event_base_new();
+	if (event_base == NULL) {
+		fprintf(stderr, "Couldn't create new event_base\n");
+		return 1;
+	}
 	evdns_base = evdns_base_new(event_base, EVDNS_BASE_DISABLE_WHEN_INACTIVE);
+	if (evdns_base == NULL) {
+		event_base_free(event_base);
+		fprintf(stderr, "Couldn't create new evdns_base\n");
+		return 1;
+	}
+	
 	evdns_set_log_fn(logfn);
 
 	if (o.servertest) {