php:7.0-apache pcre jit possibly broken

[mcnilz]

Yesterday we experienced many apache/php errors after upgrading to the newest image. The logs showed memory errors like mmap() failed. We found out that turning off pcre jit with pcre.jit=0 in php.ini is a workaround.

[zherczeg]

Usually this happens on Security Enhanced Linux if you use the basic executable allocator.

[FireLizard]

Same issue on MacOS ...

Mac: MacOS Sierra 10.12.5
Docker: Version 17.06.0-ce-mac19 (18663)

Found the workaround on stackoverflow, too.

[tianon]

Sorry for the delay!

As of #526, we're back to using PHP's bundled copy of libpcre in the default PHP-provided configuration (except on s390x, where JIT is not supported at all).

Given that, I'm inclined to consider this an upstream bug, and would suggest coming up with a reasonably simple reproducer, and filing an issue with upstream. Sorry!

In the meantime, it sounds like the simple workaround for folks affected by this is to simply add pcre.jit=0 in php.ini, as noted above. 👍