ID: 38819
Updated by: [EMAIL PROTECTED]
Reported By: madcoder at gmail dot com
-Status: Open
+Status: Feedback
Bug Type: LDAP related
Operating System: 2.6.15-gentoo linux amd64
PHP Version: 5.1.6
New Comment:
Is it possible to perform the same actions using ldapsearch utility in
console?
Previous Comments:
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[2006-09-26 10:43:23] madcoder at gmail dot com
Program received signal SIGSEGV, Segmentation fault.
0x00002af2b2e5f0ab in ldap_count_values (vals=0x55a07f90) at
getvalues.c:153
153 for ( i = 0; vals[i] != NULL; i++ )
(gdb) p vals
$1 = (char **) 0x55a07f90
(gdb) p 0
$2 = 0
(gdb) p vals[0]
Cannot access memory at address 0x55a07f90
The memory address is the same. Can't access memory? It seems like
its a problem in php's ldap_get_entries still (or further up the stack)
because ldap_count_entries(), which calls the same function, works fine
and returns '1'.
------------------------------------------------------------------------
[2006-09-26 10:38:38] [EMAIL PROTECTED]
And what is in vals[0] ?
(gdb) p vals[0]
------------------------------------------------------------------------
[2006-09-26 10:28:55] madcoder at gmail dot com
I do still get the segfault. This is the output from gdb:
(gdb) set args -e test.php
(gdb) run
Starting program: /root/php-5.1.6/sapi/cli/php -e test.php
done searching
Count: 1 entries
Program received signal SIGSEGV, Segmentation fault.
0x00002b92baa9a0ab in ldap_count_values (vals=0x55a07f90) at
getvalues.c:153
153 for ( i = 0; vals[i] != NULL; i++ )
(gdb) f 0
#0 0x00002b92baa9a0ab in ldap_count_values (vals=0x55a07f90) at
getvalues.c:153
153 for ( i = 0; vals[i] != NULL; i++ )
(gdb) p vals
$1 = (char **) 0x55a07f90
(gdb) p i
$2 = 0
If I'm understanding that correctly, it means the segfault is occuring
on the first iteration of the ldap_count_values() for loop. The first
thing I notice is that 'vals' is a 32-bit pointer. Would that have any
effect on the problem, considering this is a 64-bit system? Should I
have 32-bit emulation libraries installed for this? The only reason I
haven't installed the libraries so far is because none of the other
packages I've installed have specifically said that they are necessary.
------------------------------------------------------------------------
[2006-09-26 10:08:02] [EMAIL PROTECTED]
Ok, then please do the following:
1) get OpenLDAP sources from openldap.org (2.3.27 is the current stable
version)
2) get PHP 5.1.6 sources from php.net
3) build openldap from the sources with --enable-debug and
--prefix=/tmp/openldap
4) build PHP with ./configure --enable-debug --disable-all
--with-ldap=/tmp/openldap (no need to run make install, just use CLI
binary - ./sapi/cli/php).
5) try to reproduce it again and when/if it segfaults again type the
following commands in gdb console:
(gdb) f 0
(gdb) p vals
(gdb) p i
I'd also appreciate if you run it through valgrind and see if there are
any errors reported.
------------------------------------------------------------------------
[2006-09-26 09:48:51] madcoder at gmail dot com
No, I'm sorry, it's on a private LAN. A VPN account would be required
to gain access to the LAN, and corporate policy won't allow me to grant
you that. If you would like to contact me off-bugzilla, I might be able
to arrange a different way of accessing the server.
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the rest of the comments, please view the bug report online at
http://bugs.php.net/38819
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Edit this bug report at http://bugs.php.net/?id=38819&edit=1
