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Signed integer overflow in ext/phar fseek #18642

Closed
@YuanchengJiang

Description

@YuanchengJiang

Description

The following code:

<?phprequire_once'files/phar_oo_test.inc';class MyFileextends SplFileObject{}$phar =newPhar($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 byFlowFusion

PHP Version

dfff6ac852a23c6e33c06c7716d095ad4a7166d8

Operating System

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