Bug #73619 [NEW]: Crash or zend_mm_heap_corrupted error in opcache with OwnCloud 7 update

From: adamw at happyassassin dot net Operating system: Fedora 20 PHP version: 7.0.13 Package: opcache Bug Type: Bug Bug description:Crash or zend_mm_heap_corrupted error in opcache with OwnCloud 7 update Description: ------------ See downstream bug report: https://bugzilla.redhat.com/show_bug.cgi?id=1398474 SELinux blocks web servers from what it calls 'execmem' actions by default; as I understand it, this means execution of writeable memory, which is considered a potential avenue for exploitation and not to be necessary for well-written code. With PHP 7.0.13's default configuration, where just-in-time compilation of PCREs is enabled, Fedora 25 systems see a flood of these 'execmem' denials. Disabling the PCRE JIT feature with pcre.jit=0 makes them go away. There is some more discussion of this at https://unix.stackexchange.com/questions/287831/how-to-work-out-why-apache-is-attempting-execmem , where several people traced this problem to the PCRE JIT code using gdb and backtraces are available. These seem to run through _pcre_jit_compile / pcre_study / pcre_get_compiled_regex_cache / php_do_pcre_match . -- Edit bug report at https://bugs.php.net/bug.php?id=73619&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73619&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73619&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73619&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73619&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73619&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73619&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73619&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73619&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73619&r=support Expected behavior: https://bugs.php.net/fix.php?id=73619&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73619&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73619&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73619&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73619&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73619&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73619&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73619&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73619&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73619&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73619&r=mysqlcfg