Description:
------------
We use IMAP Authenticated Horde via IMP, therefore we need to recompile the stock Slackware PHP and include imap, ldap, gd and other support.

PHP configure string follows:
'./configure' '--prefix=/usr' '--with-apxs2=/usr/sbin/apxs' '--enable-discard-path' '--with-config-file-path=/etc/apache2' '--with-openssl' '--enable-bcmath' '--with-bz2' '--with-gettext' '--enable-pic' '--enable-calendar' '--enable-ctype' '--with-gdbm' '--with-mcrypt' '--with-imap=/usr/src/imap-2002d' '--with-mhash' '--enable-dbase' '--enable-ftp' '--with-gd' '--with-jpeg' '--with-png' '--with-gmp' '--with-mysql' '--with-pgsql' '--with-xml' '--with-mm' '--enable-trans-sid' '--enable-shmop' '--enable-sockets' '--enable-shared' '--enable-debug' '--with-zlib' '--with-dom' '--with-dom-xslt' '--with-pgsql' '--with-mcal=/usr'

Apache version is 2.0.50, configured prefork:
 -D APACHE_MPM_DIR="server/mpm/prefork"
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_SYSVSEM_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D HTTPD_ROOT="/usr"
 -D SUEXEC_BIN="/usr/bin/suexec"
 -D DEFAULT_PIDLOG="/var/run/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_LOCKFILE="/var/run/accept.lock"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types"
 -D SERVER_CONFIG_FILE="/etc/apache2/httpd.conf"

PEAR state (pear list):
Installed packages:
===================
Package        Version State
Archive_Tar    1.1     stable
Console_Getopt 1.2     stable
DB             1.6.2   stable
HTTP           1.2.2   stable
Log            1.8.5   stable
Mail           1.1.3   stable
Net_SMTP       1.2.3   stable
Net_Socket     1.0.1   stable
PEAR           1.3.2   stable
XML_Parser     1.0.1   stable
XML_RPC        1.1.0   stable


php.ini diff from php.ini-dist:
root@gateway:/etc/apache2# diff php.ini php.ini-dist
411c411
< include_path = ".:/usr/lib/php"
---
> ;include_path = ".:/php/includes"
428c428,429
< extension_dir = "./usr/lib/php"
---
> ; extension_dir = "./"
> extension_dir = "/usr/lib/php/extensions/"
532a534,536
> ;
> ; Load the MySQL extension by default.  Comment this out if you don't use MySQL.
> extension=mysql.so
533a538,540
> ; Load the gettext extension by default.  Comment this out if you don't have the
> ; gettext shared library installed.
> extension=gettext.so


System Information:

Linux gateway 2.4.26
Courier imapd 3.0.7
OpenLDAP 2.1.29
GCC 3.3.4 i486-slackware-linux

Reproduce code:
---------------
IMP Login (http://www.horde.org/imp) - IMP is configured to authenticate against IMAP (courier).

e.g. IMP causes this problem in imp/mailbox.php:

$overview = imap_fetch_overview($imp['stream'], implode(',', $msgs), FT_UID);

Expected result:
----------------
Expect successful login, but apache child process segfaults and the three lines like the following show in /var/log/apache/error_log:

[Mon Sep 06 11:49:43 2004] [notice] child pid 19707 exit signal Segmentation fault (11)
[Mon Sep 06 11:49:44 2004] [notice] child pid 19709 exit signal Segmentation fault (11)
[Mon Sep 06 11:49:44 2004] [notice] child pid 19708 exit signal Segmentation fault (11)

Actual result:
--------------

Program received signal SIGSEGV, Segmentation fault.
0x405d5d08 in _php_imap_address_size (addresslist=0x81f70e0)
    at /usr/src/php-4.3.8/ext/imap/php_imap.c:3654
3654                    ret += _php_rfc822_len(tmp->personal);

(gdb) bt

#0  0x405d5d08 in _php_imap_address_size (addresslist=0x81f70e0)
    at /usr/src/php-4.3.8/ext/imap/php_imap.c:3654
#1  0x405d0f77 in zif_imap_fetch_overview (ht=3, return_value=0x84609e4,
    this_ptr=0x0, return_value_used=1)
    at /usr/src/php-4.3.8/ext/imap/php_imap.c:2736
#2  0x4070a9f6 in execute (op_array=0x83b6094)
    at /usr/src/php-4.3.8/Zend/zend_execute.c:1635
#3  0x406f92b1 in zend_execute_scripts (type=8, retval=0x0, file_count=3)
    at /usr/src/php-4.3.8/Zend/zend.c:891
#4  0x406c22d6 in php_execute_script (primary_file=0xbffff470)
    at /usr/src/php-4.3.8/main/main.c:1734
#5  0x40710d55 in php_handler (r=0x81ce618)
    at /usr/src/php-4.3.8/sapi/apache2handler/sapi_apache2.c:561
#6  0x08067b66 in ap_run_handler (r=0x81ce618) at config.c:151
#7  0x08068138 in ap_invoke_handler (r=0x81ce618) at config.c:358
#8  0x080650eb in ap_process_request (r=0x81ce618) at http_request.c:246
#9  0x08060c69 in ap_process_http_connection (c=0x81c45d0) at http_core.c:250
#10 0x08070b06 in ap_run_process_connection (c=0x81c45d0) at connection.c:42
#11 0x08066518 in child_main (child_num_arg=81) at prefork.c:609
#12 0x080666ce in make_child (s=0x809f518, slot=0) at prefork.c:649
#13 0x0806673f in startup_children (number_to_start=5) at prefork.c:721
#14 0x08066eb9 in ap_mpm_run (_pconf=0x809d778, plog=0x80c7820, s=0x5)
    at prefork.c:940
#15 0x0806c608 in main (argc=2, argv=0xbffff7f4) at main.c:617