Goodday,
I have tried to make a setup using mod_lua using version 2.4.1 of the
apache httpd server and noticed that requests involving lua render a
segfault message in the error log like this one:
[Fri Feb 24 11:42:41.410706 2012] [core:notice] [pid 64609:tid 34397516800] AH00052: child pid 64612 exit signal Segmentation fault (11)
This is very easy to replicate by following these steps:
- download the httpd-2.4.1.tar.gz from
http://httpd.apache.org/download.cgi#apache24
- create a directory, in my case I created /apache24 and changed
ownership to myself
- extract the tarball
- execute:
./configure --prefix /apache24 --enable-lua
- run 'make' and 'make install'
- modify /apache24/conf/httpd.conf and make the following changes:
Listen 8080 # (Instead of 80)
LoadModule lua_module modules/mod_lua.so
LuaHookAccessChecker /apache24/lua/luatest.lua access_hook
- Create /apache24/lua/luatest.lua with the following contents (Other
contents render a segfault as well)
-----
require 'apache2'
function access_hook(r)
r:puts("---- access_hook\n")
return apache2.DECLINE
end
-----
- start the server using a simple '/apache24/bin/httpd'
- Keep a tail open on the error log
- Do something like: curl -D - -s 'http://localhost:8080/'
- You will see expected output, i.e. "---- access_hook" and the "It
works!" text.
- The error log will log a segfault from the child that handled the
request, like the one I paste above.
This can be fixed by the attached patch, which is really crude and
doesn't consider whether it opens up a memory leak or not.
Is there something I'm doing wrong, or is this a bug in the 2.4.1
mod_lua?
This happens both on FreeBSD 9.0-RELEASE as well as
linux 2.6.27.59 and 3.0.20.
Thanks in advance,
Marco van Tol
--
Marco van Tol
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