Segmentation fault in zend observer

[YuanchengJiang]

Description

The following code:

<?php
function bar() {}
var_dump(ini_set("zend_test.observer.observe_function_names", "bar"));

Resulted in this output:

/php-src/Zend/zend_observer.c:184:53: runtime error: applying zero offset to null pointer

But I expected this output instead:

-d "zend_test.observer.enabled=1"

PHP Version

nightly

Operating System

ubuntu 22.04

[YuanchengJiang]

<?php
function foo()
{
}
function bar()
{
}
foo();
bar();
ini_set("zend_test.observer.observe_function_names", "bar");

Zend/zend_observer.c:195: void zend_observer_add_begin_handler(zend_function *, zend_observer_fcall_begin_handler): Assertion `0' failed.

[YuanchengJiang]

The following code:

<?php
var_dump(ini_set("zend_test.observer.observe_function_names", "bar"));
function d() {}

Resulted in this output:

/home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend_observer.c:200:35: runtime error: applying zero offset to null pointer
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend_observer.c:200:35 in 

To reproduce:

./php-src/sapi/cli/php  -d "zend_test.observer.enabled=1" -d "zend_test.observer.observe_function_names=a,d" ./test.php

Commit:

7e5ad5caf8e249453a84b4f62565188cf69b877f

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

[YuanchengJiang]

The following code:

<?php
function foo()
{
echo 'Foo' . PHP_EOL;
}
function bar()
{
echo 'Bar' . PHP_EOL;
}
foo();
bar();
ini_set("zend_test.observer.observe_function_names", "bar");

Resulted in this output:

php: /home/phpfuzz/WorkSpace/flowfusion/php-src/Zend/zend_observer.c:195: void zend_observer_add_begin_handler(zend_function *, zend_observer_fcall_begin_handler): Assertion `0' failed.
Aborted (core dumped)

To reproduce:

./php-src/sapi/cli/php  -d "zend_test.observer.enabled=1" -d "zend_test.observer.observe_all=1" ./test.php

Commit:

2b637dfc4e5e33198439387172172213eed2b561

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