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JIT function crash when emitting undefined variable warning and opline is not set yet #18899

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@YuanchengJiang

Description

@YuanchengJiang

Description

The following code:

<?php
function test($a) {
$ary = [$a];
}
var_dump(test(1));
function ptr2str($fusion)
{
for ($i=0; $i<8; $i++) {
$ptr >>= 8;
}
}
$sf = new SoapFault('1', 'string', 'detail', 'header','line', str_repeat("A",232).ptr2str($addr));

Resulted in this output:

/home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend_execute_API.c:701:22: runtime error: member access within misaligned address 0x000000000001 for type 'const zend_op' (aka 'const struct _zend_op'), which requires 8 byte alignment
0x000000000001: note: pointer points here
<memory cannot be printed>
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend_execute_API.c:701:22 in 

To reproduce:

./php-src/sapi/cli/php  -d "zend_extension=/home/phpfuzz/WorkSpace/flowfusion/php-src/modules/opcache.so" -d "opcache.jit=1205" -d "opcache.enable_cli=1" ./test.php

Commit:

be70f42de7c9ec0e6158ce9ec9d21f0dac24897f

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

be70f42de7c9ec0e6158ce9ec9d21f0dac24897f

Operating System

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