phar memory leak

[LamentXU123]

Description

Originally posted by @devnexen in #23418

The following code:

<?php
$stub = "<?php __HALT_COMPILER(); ?>\r\n";

function u32($v) { return pack('V', $v); }

function ent($name, $data, $meta = '') {
    $h = u32(strlen($name)) . $name
       . u32(strlen($data)) . u32(0) . u32(strlen($data))
       . u32(crc32($data)) . u32(0)
       . u32(strlen($meta)) . $meta;
    return [$h, $data];
}

$e1 = ent('a.txt', 'hello', 'i:1;');
$e2 = ent('a.txt', 'world', 'i:2;');

$ents = $e1[0] . $e2[0];
$contents = $e1[1] . $e2[1];

$manifest = u32(2) . "\x11\x00" . u32(0) . u32(0) . u32(0) . $ents;

file_put_contents(__DIR__ . '/dup.phar', $stub . u32(strlen($manifest)) . $manifest . $contents);

$p = new Phar(__DIR__ . '/dup.phar');
echo iterator_count($p), PHP_EOL;

Resulted in this output:

==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 32 byte(s) in 1 object(s) allocated from:
    #4 zend_string_init                        Zend/zend_string.h:212
    #5 phar_parse_metadata_lazy                ext/phar/phar.c:705
    #6 phar_parse_pharfile                     ext/phar/phar.c:1191
    #10 zim_Phar___construct                   ext/phar/phar_object.c:1125

Direct leak of 32 byte(s) in 1 object(s) allocated from:
    #4 zend_string_init                        Zend/zend_string.h:212
    #5 phar_parse_pharfile                     ext/phar/phar.c:1177
    #9 zim_Phar___construct                    ext/phar/phar_object.c:1125

PHP Version

PHP 8.6.0-dev

Operating System

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