From 381e9cac09a6c393009be1033a908da9860e4e50 Mon Sep 17 00:00:00 2001
From: Urban Müller
Date: Mon, 1 Nov 2021 15:20:23 +0100
Subject: report redirect loops

---
 it_url.class | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/it_url.class b/it_url.class
index f37bf97..6a0b126 100644
--- a/it_url.class
+++ b/it_url.class
@@ -830,6 +830,9 @@ static function redirect($url = null, $type = "temporary")
 
 	$url = preg_replace("/[\r\n].*/", '', it_url::absolute($url));	# Security: cut after CR/LF
 
+	if (!$_POST && $url == it_url::absolute(U($_GET)))
+		it::error("redirect to self: $url");
+
 	if (EDC('noredir'))
 	{
 		if (!function_exists('a'))
-- 
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