From 150303b2b88fff33dba96d6fabaf517bec3fb9ec Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Mon, 22 Aug 2022 17:13:43 +0200
Subject: user/netstack: ARP cache

---
 src/shared/printf.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/shared')

diff --git a/src/shared/printf.c b/src/shared/printf.c
index 2dc3048..ff07c72 100644
--- a/src/shared/printf.c
+++ b/src/shared/printf.c
@@ -171,6 +171,7 @@ int __printf_internal(const char *fmt, va_list argp,
 static void vsnprintf_backend(void *arg, const char *buf, size_t len) {
 	char **ptrs = arg;
 	size_t space = ptrs[1] - ptrs[0];
+	if (!ptrs[0]) return;
 	if (len > space) len = space;
 
 	memcpy(ptrs[0], buf, len);
-- 
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