From c0572443dcfe544071ef2f66f0059ebd7b01311b Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Fri, 23 Sep 2022 09:40:10 +0100
Subject: [PATCH] uri.c: Fix oss-fuzz issue 48362

Introduced by fix #818 Feb 7 2022.
---
 src/uri.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/uri.c b/src/uri.c
index d66038c0..21b8a53d 100644
--- a/src/uri.c
+++ b/src/uri.c
@@ -61,7 +61,7 @@ coap_split_uri_sub(const uint8_t *str_var,
   int is_http_proxy_scheme = 0;
   size_t keep_len = len;
 
-  if (!str_var || !uri)
+  if (!str_var || !uri || len == 0)
     return -1;
 
   memset(uri, 0, sizeof(coap_uri_t));