0005744: mod_caucho conflict with mod_fcgid under apache 2.2

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Severity

Reproducibility

Date Submitted

Last Update

0005744

[Resin]

major

always

06-03-14 01:01

11-11-14 11:09

Reporter

ssmax

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Platform

Status

closed

Projection

none

OS Version

ETA

none

Fixed in Version

4.0.42

Product Version

4.0.40

Product Build

Summary

0005744: mod_caucho conflict with mod_fcgid under apache 2.2

Description

mod_caucho conflict with mod_fcgid under apache 2.2

system: centos / debian
httpd: 2.2.22 and 2.2.27 has been tested
resin: 4.0.37 and 4.0.40 has been tested

mod_caucho lead the fcgid exit with CauchoHost config like this:

    LoadModule caucho_module /home/apache/modules/mod_caucho.so
    CauchoHost 127.0.0.1 6800

    <Location /resin-doc>
        SetHandler caucho-request
    </Location>

    Alias /cgi-bin "/home/apache/cgi-bin"
    <Directory "/home/apache/cgi-bin">
        AllowOverride Options
        Options -Indexes +FollowSymLinks +ExecCGI
        Order allow,deny
        Allow from all
        AddHandler fcgid-script .fcgi
    </Directory>

[Tue Jun 03 15:44:18 2014] [error] mod_fcgid: process /home/apache/cgi-bin/test.fcgi(28764) exit(communication error), get unexpected signal 11

/home/apache/cgi-bin/test.fcgi
#!/usr/bin/perl

use strict;
use CGI::Fast;

my $count = 0;
while (my $q = CGI::Fast->new) {
    print("Content-Type: text/plain\n\n");
    print("Process ID: $$; Count is: " . ++$count);
}

look into the core dump, it seems mod_caucho access some invalid memory when fcgid request clean up.

0 0x0000000000000000 in ?? ()
0000001 0x00007f1d4936812e in run_child_cleanups (p=0x1031138) at memory/unix/apr_pools.c:2365
0000002 cleanup_pool_for_exec (p=0x1031138) at memory/unix/apr_pools.c:2372
0000003 0x00007f1d49368148 in cleanup_pool_for_exec (p=0x1031138) at memory/unix/apr_pools.c:2375
0000004 0x00007f1d49368148 in cleanup_pool_for_exec (p=0x102f128) at memory/unix/apr_pools.c:2375
0000005 0x00007f1d49372666 in apr_proc_create (new=<value optimized out>,
    progname=0x10f6d40 "/home/apache/cgi-bin/test.fcgi", args=0x10f6d30, env=0x10f6d88, attr=0x10f6df0, pool=0x10f6578)
    at threadproc/unix/proc.c:425
0000006 0x00007f1d460d53f9 in fcgid_create_privileged_process (cmdline=<value optimized out>, procinfo=0x7fff65ab4890,
    procnode=0x7f1d45069248) at fcgid_proc_unix.c:146
0000007 proc_spawn_process (cmdline=<value optimized out>, procinfo=0x7fff65ab4890, procnode=0x7f1d45069248)
    at fcgid_proc_unix.c:373
0000008 0x00007f1d460d2429 in fastcgi_spawn (main_server=<value optimized out>, configpool=0x1031138) at fcgid_pm_main.c:609
0000009 pm_main (main_server=<value optimized out>, configpool=0x1031138) at fcgid_pm_main.c:644
0000010 0x00007f1d460d3e82 in create_process_manager (main_server=0x1038870, configpool=0x1031138) at fcgid_pm_unix.c:305
0000011 procmgr_post_config (main_server=0x1038870, configpool=0x1031138) at fcgid_pm_unix.c:420
0000012 0x00007f1d460cdaea in fcgid_init (config_pool=0x1031138, plog=<value optimized out>, ptemp=<value optimized out>,
    main_server=0x1038870) at mod_fcgid.c:709
0000013 0x0000000000439e19 in ap_run_post_config (pconf=0x1031138, plog=0x1039178, ptemp=0x1035158, s=0x1038870) at config.c:94
0000014 0x000000000042649b in main (argc=3, argv=0x7fff65ab4ca8) at main.c:742

when only replace the older mod_caucho.so(4.0.24), other things remain the same, and then every thing is good.

Steps To Reproduce

Additional Information

Attached Files

Relationships

Notes
(0006451) ssmax 06-03-14 01:42	it seems that this happen since 4.0.36 after fixing some failover problem and support httpd 2.4. test with 4.0.35 , everything is fine too.

Issue History
Date Modified	Username	Field	Change
06-03-14 01:01	ssmax	New Issue
06-03-14 01:42	ssmax	Note Added: 0006451
11-11-14 11:09	ferg	Assigned To	=> ferg
11-11-14 11:09	ferg	Status	new => closed
11-11-14 11:09	ferg	Resolution	open => fixed
11-11-14 11:09	ferg	Fixed in Version	=> 4.0.42

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