Assertion failure `zend_weakref_unregister(zend_object *, void *, _Bool): Assertion 'tagged_ptr && "Weakref not registered?"' failed`

Description

The following code:

<?php
try {
function garbageCollectionTrigger() {
for ($i = 0; $i < 10000; $i++) {
$obj = new stdClass();
$weakReferences[] = WeakReference::create($obj);
garbageCollectionTrigger();
$root = $document->createElement('root');
$document = new DomDocument();
}
gc_collect_cycles();
}
garbageCollectionTrigger();
} catch (\Throwable $_ffl_e) {}

Resulted in this output:

php: /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/Zend/zend_weakrefs.c:126: void zend_weakref_unregister(zend_object *, void *, _Bool): Assertion `tagged_ptr && "Weakref not registered?"' failed.
Aborted (core dumped)

To reproduce:

/home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php  ./test.php

Commit:

9dc29aafa5eecc71a9f9e2c7607b588597a91810

Configurations:

CC="clang-12" CXX="clang++-12" CFLAGS="-DZEND_VERIFY_TYPE_INFERENCE" CXXFLAGS="-DZEND_VERIFY_TYPE_INFERENCE" ./configure --enable-debug --enable-address-sanitizer --enable-undefined-sanitizer --enable-re2c-cgoto --enable-fpm --enable-litespeed --enable-phpdbg-debug --enable-zts --enable-bcmath --enable-calendar --enable-dba --enable-dl-test --enable-exif --enable-ftp --enable-gd --enable-gd-jis-conv --enable-mbstring --enable-pcntl --enable-shmop --enable-soap --enable-sockets --enable-sysvmsg --enable-zend-test --with-zlib --with-bz2 --with-curl --with-enchant --with-gettext --with-gmp --with-mhash --with-ldap --with-libedit --with-readline --with-snmp --with-sodium --with-xsl --with-zip --with-mysqli --with-pdo-mysql --with-pdo-pgsql --with-pgsql --with-sqlite3 --with-pdo-sqlite --with-webp --with-jpeg --with-freetype --enable-sigchild --with-readline --with-pcre-jit --with-iconv

Operating System:

Ubuntu 20.04 Host, Docker 0599jiangyc/flowfusion:latest

This bug was found by fusion-fuzz

PHP Version

nightly

Operating System

No response

从 Zend/zend_weakrefs.c 第 126 行附近开始，使用列出的 debug 和 sanitizer 配置，对 commit 9dc29aafa5eecc71a9f9e2c7607b588597a91810 运行提供的 test.php 命令。跟踪到达 assertion 的 WeakReference 与垃圾回收交互，然后添加或确定一个 regression test，证明 reproducer 不再中止。