Bug #72281 [NEW]: PaX MPROTECT breaks php

From: tk at giga dot or dot at Operating system: NetBSD PHP version: 7.0.7 Package: Compile Failure Bug Type: Bug Bug description:PaX MPROTECT breaks php Description: ------------ When compiling php-7.0.7 on NetBSD-7.99.29/amd64, the compilation fails because php dumps core. The problem is that NetBSD on that release has PaX MPROTECT turned on by default (see http://netbsd.gw.com/cgi-bin/man-cgi?security++NetBSD-current), i.e. it does not allow mapping pages both writable and executable. However, this is needed by php. The backtrace of the core dump has: #1 0x00000000004d0d87 in _pcre_jit_exec () #2 0x00000000004a53f1 in php_pcre_exec () Since JIT and MPROTECT are at odds with each other, I suggest running "paxctl +m" on the binary, which (on NetBSD, see http://netbsd.gw.com/cgi-bin/man-cgi?paxctl++NetBSD-current) removes the MPROTECT restrictions for the php binary. A workaround patch is attached. It can not be used as is, since paxctl on *BSD and paxctl on Linux have different syntax. I hope that someone can extend this to also work on Linux. The patch is an example, but is tested and works on NetBSD. -- Edit bug report at https://bugs.php.net/bug.php?id=72281&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=72281&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=72281&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=72281&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=72281&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=72281&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=72281&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=72281&r=needscript Try newer version: https://bugs.php.net/fix.php?id=72281&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=72281&r=support Expected behavior: https://bugs.php.net/fix.php?id=72281&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=72281&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=72281&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=72281&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72281&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=72281&r=dst IIS Stability: https://bugs.php.net/fix.php?id=72281&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=72281&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=72281&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=72281&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=72281&r=mysqlcfg