[php-src] Issue #22585: SEGV Zend/zend_variables.h member access within null pointer
[email protected] (YuanchengJiang) Sat, 4 Jul 2026 03:14:11 +0000
| Newsgroups | php.bugs |
|---|---|
| Message-ID | <[email protected]> |
Issue: https://github.com/php/php-src/issues/22585
Author: YuanchengJiang
### Description
The following code:
```php
<?php
try {
class MySoapClient extends SoapClient {
public function __doRequest($request, $location, $action, $version, $one_way = false, ?string $uriParserClass = null): string {
return '';
}
}
function main() {
for (;;) {
$soap = new MySoapClient(
null,
array(
'location' => "http://localhost/soap.php",
'uri' => "http://localhost/",
)
);
$soap->call(1.1);
main();
}
}
$soap = new MySoapClient(
null,
array(
'location' => "http://localhost/soap.php",
'uri' => "http://localhost/",
)
);
main();
} catch (\Throwable $_ffl_e) {}
```
Resulted in this output:
```
Zend/zend_variables.h:43:8: runtime error: member access within null pointer of type 'zend_refcounted' (aka 'struct _zend_refcounted')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Zend/zend_variables.h:43:8 in
```
To reproduce:
```
/home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php ./test.php
```
Commit:
```
73a9bcf37ff61f946f50b52f0393b5f6a880cd24
```
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](https://github.com/fusion-fuzz/fusion-fuzz)*
### PHP Version
```plain
nightly
```
### Operating System
_No response_