From 1c0100006a7a2411c5667a0a48933d2f75707d37 Mon Sep 17 00:00:00 2001
From: Eric Duminil <eric.duminil@gmail.com>
Date: Mon, 28 Feb 2022 11:59:33 +0100
Subject: [PATCH] Off-by-one error in string validation

---
 ampel-firmware/src/lib/IotWebConf/src/IotWebConfTParameter.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ampel-firmware/src/lib/IotWebConf/src/IotWebConfTParameter.h b/ampel-firmware/src/lib/IotWebConf/src/IotWebConfTParameter.h
index ecf50c8..6393411 100644
--- a/ampel-firmware/src/lib/IotWebConf/src/IotWebConfTParameter.h
+++ b/ampel-firmware/src/lib/IotWebConf/src/IotWebConfTParameter.h
@@ -419,7 +419,7 @@ protected:
     if (length > 0)
     {
       char parLength[11];
-      snprintf(parLength, 11, "%d", length);
+      snprintf(parLength, 11, "%d", length - 1); // To allow "\0" at the end of the string.
       String maxLength = String("maxlength=") + parLength;
       pitem.replace("{l}", maxLength);
     }
-- 
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