[php-src] Issue #22885: SEGV zim_ZipArchive_setCommentName

[email protected] (YuanchengJiang) Sat, 25 Jul 2026 08:40:58 +0000
Newsgroups php.bugs
Message-ID <[email protected]>
Issue: https://github.com/php/php-src/issues/22885
Author: YuanchengJiang

### Description

The following code:

```php
<?php
try {
$zip = new ZipArchive;
$dirname = __DIR__ . '/';
$file = $dirname . 'oo_setcomment.zip';
class HikariConfig {
}
if (!$zip->open($file, ZIPARCHIVE::CREATE)) {
}
$zip->addFromString('entry2.txt', 'entry #2');
var_dump($zip->setCommentIndex($zip->lastId, 'entry4.txt'));
@unlink($file);
class HikariDataSource {
public function getTotalConnections() {
return $this->idleConnections;
}
}
function testMaxLifetime() {
$config = new HikariConfig();
$config->setMinimumIdle(0);
}
testMaxLifetime();
var_dump(get_defined_vars());
} catch (\Throwable $_ffl_e) {}
```

Resulted in this output:
```
AddressSanitizer:DEADLYSIGNAL
=================================================================
==2174833==ERROR: AddressSanitizer: SEGV on unknown address 0x00005a80002c (pc 0x7f20de77ee39 bp 0x7ffcb5174eb0 sp 0x7ffcb5174648 T0)
==2174833==The signal is caused by a READ memory access.
    #0 0x7f20de77ee39  string/../sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S:413
    #1 0x61c1ce in MemcmpInterceptorCommon(void*, int (*)(void const*, void const*, unsigned long), void const*, void const*, unsigned long) (/home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php+0x61c1ce)
    #2 0x61c54a in memcmp (/home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php+0x61c54a)
    #3 0x7f20de83709e in zip_file_set_comment (/lib/x86_64-linux-gnu/libzip.so.4+0x709e)
    #4 0x48e650e in php_zip_set_file_comment /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/ext/zip/php_zip.c:78:9
    #5 0x48e60b4 in zim_ZipArchive_setCommentName /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/ext/zip/php_zip.c:2218:2
    #6 0x5d047c1 in ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/Zend/zend_vm_execute.h:2152:4
    #7 0x5abdaba in execute_ex /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/Zend/zend_vm_execute.h:110493:12
    #8 0x5abfba8 in zend_execute /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/Zend/zend_vm_execute.h:115931:2
    #9 0x66eb2dc in zend_execute_script /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/Zend/zend.c:1977:3
    #10 0x5024f1d in php_execute_script_ex /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/main/main.c:2631:13
    #11 0x5026198 in php_execute_script /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/main/main.c:2671:9
    #12 0x66fe7a2 in do_cli /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php_cli.c:947:5
    #13 0x66f8f86 in main /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php_cli.c:1368:18
    #14 0x7f20de60ed8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
    #15 0x7f20de60ee3f in __libc_start_main csu/../csu/libc-start.c:392:3
    #16 0x605b04 in _start (/home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php+0x605b04)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV string/../sysdeps/x86_64/multiarch/memcmp-avx2-movbe.S:413 
==2174833==ABORTING
```

To reproduce:
```
/home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php  ./test.php
```

Commit:
```
55c4eb2a1b859c04c1eab8b17b15825e656e5a83
```

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
55c4eb2a1b859c04c1eab8b17b15825e656e5a83
```

### Operating System

_No response_