Skip to content

Signed integer overflow in ext/phar fseek #18642

Closed
@YuanchengJiang

Description

@YuanchengJiang

Description

The following code:

<?php
require_once 'files/phar_oo_test.inc';
class MyFile extends SplFileObject
{
}
$phar = new Phar($fname);
$phar->setInfoClass('MyFile');
$f = $phar['a.php'];
var_dump($f->fseek(PHP_INT_MAX));

Resulted in this output:

/home/phpfuzz/WorkSpace/flowfusion/php-src/ext/phar/stream.c:419:22: runtime error: signed integer overflow: 278 + 9223372036854775807 cannot be represented in type 'long'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/phpfuzz/WorkSpace/flowfusion/php-src/ext/phar/stream.c:419:22 in 

To reproduce:

./php-src/sapi/cli/php  -d "phar.require_hash=0" ./test.php

Commit:

dfff6ac852a23c6e33c06c7716d095ad4a7166d8

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 report is automatically generated by FlowFusion

PHP Version

dfff6ac852a23c6e33c06c7716d095ad4a7166d8

Operating System

No response

Metadata

Metadata

Assignees

Type

No type

Projects

No projects

Milestone

No milestone

Relationships

None yet

Development

No branches or pull requests

Issue actions