[php-src] Issue #22649: SEGV zim_ZipArchive_setCommentIndex

[email protected] (YuanchengJiang) Thu, 9 Jul 2026 08:40:14 +0000
Newsgroups php.bugs
Message-ID <[email protected]>
Issue: https://github.com/php/php-src/issues/22649
Author: YuanchengJiang

### Description

The following code:

```php
<?php
try {
$zip = new ZipArchive;
$file = $dirname . 'oo_setcomment.zip';
if (!$zip->open($file, ZIPARCHIVE::CREATE)) {
}
$zip->addFromString('dir/entry2d.txt', 'entry #2');
var_dump($zip->setCommentName('dir/entry2d.txt', 'dir/entry2d.txt'));
} catch (\Throwable $_ffl_e) {}
```

Resulted in this output:
```
AddressSanitizer:DEADLYSIGNAL
=================================================================
==3555404==ERROR: AddressSanitizer: SEGV on unknown address 0x00000b800043 (pc 0x7f43b11c4c72 bp 0x7ffdeab7ccd0 sp 0x7ffdeab7c468 T0)
==3555404==The signal is caused by a READ memory access.
    #0 0x7f43b11c4c72  string/../sysdeps/x86_64/multiarch/memcmp-sse4.S:109
    #1 0x61bfae 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+0x61bfae)
    #2 0x61c32a in memcmp (/home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/sapi/cli/php+0x61c32a)
    #3 0x7f43b127209e in zip_file_set_comment (/lib/x86_64-linux-gnu/libzip.so.4+0x709e)
    #4 0x476d3d3 in zim_ZipArchive_setCommentIndex /home/fuzz/WorkSpace/fusion-fuzz/projects/php/php-src/ext/zip/php_zip.c:2231:2
LLVMSymbolizer: error reading file: No such file or directory
    #5 0x483a9708  (/dev/zero (deleted)+0x8003708)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV string/../sysdeps/x86_64/multiarch/memcmp-sse4.S:109 
==3555404==ABORTING
```

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](https://github.com/fusion-fuzz/fusion-fuzz)*

### PHP Version

```plain
nightly
```

### Operating System

_No response_