Bug #72576 [Opn->Fbk]: Memory leak or potential segfaul in LibXML

Edit report at https://bugs.php.net/bug.php?id=72576&edit=1 ID: 72576 Updated by: cmb@php.net Reported by: eugen dot mayer at kontextwork dot de Summary: Memory leak or potential segfaul in LibXML -Status: Open +Status: Feedback Type: Bug Package: XML related Operating System: Linux, Debian Jessie PHP Version: 7.0.8 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with , is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. BTW: the valgrind report shows memory leaks, but I cannot see anything regarding a segfault. Previous Comments: ------------------------------------------------------------------------ [2016-07-11 12:23:58] eugen dot mayer at kontextwork dot de Description: ------------ When using this Jessie-Setup with PHP 7.0.8, disabling all extensions leaving it with: php -m [PHP Modules] Core date filter hash libxml openssl pcntl pcre Reflection session SPL standard zlib Using valgrind, i get a memory leak https://gist.github.com/EugenMayer/bdfe97f551caf6923ba5b911b7959476 Even though the linked repo has memcached it its name, its not memcached related. I was hunting a memcached igbinary bug, but this crossed our setup recently. Test script: --------------- git clone https://github.com/EugenMayer/deb-surg-org-tests cd deb-surg-org-tests/memcached docker-compose build docker run -i -t eugenmayer/deb-surg-org-tests:memcached valgrind --leak-check=full --leak-check=full --show-leak-kinds=all /usr/bin/php7.0 -S localhost:8085 CTRL+C Expected result: ---------------- Not having a Segfault, like running the same with php5.5 git clone https://github.com/EugenMayer/deb-surg-org-tests cd deb-surg-org-tests/memcached docker-compose build docker run -i -t eugenmayer/deb-surg-org-tests:memcached valgrind --leak-check=full --leak-check=full --show-leak-kinds=all /usr/bin/php5.5 -S localhost:8085 CTRL+C valgrind --leak-check=full /usr/bin/php7.0 -S localhost:8085 ==18== Memcheck, a memory error detector ==18== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al. ==18== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info ==18== Command: /usr/bin/php7.0 -S localhost:8085 ==18== PHP 7.0.8-2+0~20160628130014.3+jessie~1.gbp5338fb Development Server started at Mon Jul 11 09:47:52 2016 Listening on http://localhost:8085 Document root is /etc/php/7.0/cli/conf.d Press Ctrl-C to quit. Actual result: -------------- https://gist.github.com/EugenMayer/bdfe97f551caf6923ba5b911b7959476 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72576&edit=1