Apache crashes on F21 with roundcube (not PHP) ->modsec + GCC 4.9

[Reindl Harald]

mod_security-2.9.0-1.fc21.20150410.rh.x86_64
mod_security disabled and the crashes are gone

well, the exactly same build with identical options on F20 with GCC 4.8 
is running here in production perfectly - somehow GCC 4.9 seems to be 
involved here

i will track that down to GCC optimize flags and report it to 
mod_security upstream - strange that the crashes only happen in context 
of /plugins/jqueryui/js/i18n/jquery.ui.datepicker-de.js *and* modsec

Am 27.04.2015 um 13:08 schrieb Reindl Harald:
> Am 27.04.2015 um 13:01 schrieb Reindl Harald:
>> Am 27.04.2015 um 12:49 schrieb drago01:
>>> On Mon, Apr 27, 2015 at 11:12 AM, Reindl Harald
>>> <h.reindl at thelounge.net> wrote:
>>>> am i the only one facing reproduceable crashes of apache worker
>>>> process each
>>>> time a roundcube 1.0.5 page is loaded? all relevant packages (apache,
>>>> php..)
>>>> here are built from identical srpms andthe only difference is the
>>>> Fedora 21
>>>> userland and a newer GCC
>>>>
>>>> that affects the same way PHP 5.5 as PHP 5.6
>>>
>>> You need a backtrace (better with debug symbols) to track it down ..
>>> strace output doesn't really tell much here
>>
>> not that easy with non-debug builds and in context of a preforking
>> apache with mod_php hecne the question if anybody can see that issue too
>>
>> it's not really obvious because there is nohting missing in the browser
>> and so it seems to happen very late at the request, you can see only the
>> loglines in the apache errorlog
>>
>> [Mon Apr 27 12:51:33.076997 2015] [core:notice] [pid 85570] AH00052:
>> child pid 85572 exit signal Segmentation fault (11)
>
> uhm - it's not PHP - it's httpd crashing by request the js file
> /plugins/jqueryui/js/i18n/jquery.ui.datepicker-de.js
>
> need to investigate that deeper if it's the gcc optimize options in
> general and what part of httpd can crash by deliver a static js file
> (mod_deflate and so on are active)

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