#1042457 php-net-dns2: incompatible with PHP 8.x: Uncaught ValueError: fread()

Package:
php-net-dns2
Source:
php-net-dns2
Submitter:
Ondrej Zary
Date:
2025-08-11 15:23:25 UTC
Severity:
normal
Tags:
#1042457#5
Date:
2023-07-28 12:49:49 UTC
From:
To:
Dear Maintainer,
after upgrading to Debian 12, Horde stopped working. It logs messages like:
PHP Fatal error:  Uncaught ValueError: fread(): Argument #2 ($length) must be greater than 0 in /usr/share/php/Net/DNS2/Cache/File.php:142
Stack trace:
#0 /usr/share/php/Net/DNS2/Cache/File.php(142): fread()
#1 [internal function]: Net_DNS2_Cache_File->__destruct()
#2 {main}
  thrown in /usr/share/php/Net/DNS2/Cache/File.php on line 142, referer: https://localhost/horde/imp/dynamic.php?page=mailbox

It's a known bug of Net_DNS2, already fixed upstream.

A quick fix:
--- /usr/share/php/Net/DNS2/Cache/File.php-     2020-10-19 22:19:24.000000000 +0200
+++ /usr/share/php/Net/DNS2/Cache/File.php      2023-07-28 14:41:16.342298660 +0200
@@ -139,7 +139,11 @@
             //
             // read the file contents
             //
-            $data = @fread($fp, filesize($this->cache_file));
+            $data = false;
+            $file_size = @filesize($this->cache_file);
+            if ( ($file_size !== false) && ($file_size > 0) ) {
+                $data = @fread($fp, $file_size);
+            }
             if ( ($data !== false) && (strlen($data) > 0) ) {

                 //