From 718f44ae5b6f07dafd43efca1fc642be0716cb86 Mon Sep 17 00:00:00 2001
From: Christian Helmuth <christian.helmuth@genode-labs.com>
Date: Wed, 5 May 2021 15:02:30 +0200
Subject: [PATCH] Check max_len before dereferencing pointer in Cstring
 constructor

Fixes #4112
---
 repos/base/include/util/string.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/repos/base/include/util/string.h b/repos/base/include/util/string.h
index 5e41b53d76..eb852fa0f0 100644
--- a/repos/base/include/util/string.h
+++ b/repos/base/include/util/string.h
@@ -552,7 +552,7 @@ class Genode::Cstring
 			 * null once we reach 'max_len'.
 			 */
 			size_t res = 0;
-			for (; str && *str && res < max_len; str++, res++);
+			for (;  res < max_len && str && *str; str++, res++);
 			return res;
 		}