Bug #72576 [NEW]: Memory leak or potential segfaul in LibXML

From: eugen dot mayer at kontextwork dot de Operating system: Linux, Debian Jessie PHP version: 7.0.8 Package: PECL Bug Type: Bug Bug description:Memory leak or potential segfaul in LibXML 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 bug report at https://bugs.php.net/bug.php?id=72576&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=72576&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=72576&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=72576&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=72576&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=72576&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=72576&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=72576&r=needscript Try newer version: https://bugs.php.net/fix.php?id=72576&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=72576&r=support Expected behavior: https://bugs.php.net/fix.php?id=72576&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=72576&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=72576&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=72576&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72576&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=72576&r=dst IIS Stability: https://bugs.php.net/fix.php?id=72576&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=72576&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=72576&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=72576&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=72576&r=mysqlcfg