From c1b609db4f720b0fb60ef675a9defccf52689881 Mon Sep 17 00:00:00 2001
From: zzblydia <13098426+zzblydia@users.noreply.github.com>
Date: Fri, 23 Aug 2024 22:15:12 +0800
Subject: [PATCH] lws_snprintf: check null pointer before using

---
 lib/core/libwebsockets.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/core/libwebsockets.c b/lib/core/libwebsockets.c
index 4fd5d561c..21e77efbd 100644
--- a/lib/core/libwebsockets.c
+++ b/lib/core/libwebsockets.c
@@ -867,7 +867,7 @@ lws_snprintf(char *str, size_t size, const char *format, ...)
 	va_list ap;
 	int n;
 
-	if (!size)
+	if (!str || !size)
 		return 0;
 
 	va_start(ap, format);