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Assertion status == LXB_STATUS_OK in dom_parse_selector when lexbor allocation fails #25306
Description
Description
The following code:
<?php
$dom = Dom\XMLDocument::createFromString("<root/>");
$pad = str_repeat("a", 1400000);
$dom->documentElement->closest("root");Resulted in this output:
php: ext/dom/parentnode/css_selectors.c:85: lxb_css_selector_list_t *dom_parse_selector(lxb_css_parser_t *, lxb_selectors_t *, const zend_string *, lxb_selectors_opt_t, const dom_object *): Assertion `status == LXB_STATUS_OK' failed.
Aborted (core dumped)
To reproduce: USE_ZEND_ALLOC=1 ./sapi/cli/php -d memory_limit=2M test.php
Commit:
33a61f765a94e018a8d55d962a73e8c8331ee256
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-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-pcre-jit --with-iconv
Operating System:
Ubuntu 20.04 Host, Docker 0599jiangyc/flowfusion:latest
This report is automatically generated by FlowFusion
PHP Version
nightly
Operating System
No response
Activity
[-][Medium] Assertion status == LXB_STATUS_OK in dom_parse_selector when lexbor allocation fails[/-][+]Assertion status == LXB_STATUS_OK in dom_parse_selector when lexbor allocation fails[/+]ndossche commentedon Nov 9, 2026
Regressed due to OOM changes.