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Bug #32461 MySQL Extension Segmentation Fault
Submitted: 2005-03-26 05:10 UTC Modified: 2005-04-02 23:43 UTC
From: nofulfillment at numbinside dot net Assigned:
Status: Closed Package: MySQL related
PHP Version: 5.0.3 OS: GNU/Linux (Slackware 10.1)
Private report: No CVE-ID: None
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 [2005-03-26 05:10 UTC] nofulfillment at numbinside dot net 
Description:
------------
I'm working with phpMyAdmin (irrelivent, but aids in understanding), and I had the MYSQL_SOCKET file configured wrong. PHP's MySQL extension was creating a Segmentation fault in that it was trying to read a non-existant file. 

My configure line, I do not believe to be relavent, but I have included it anyways. (Along with some other details from phpinfo())
System:            Linux NcFTestServer-Linux 2.4.29-grsec #7 SMP Thu Feb 3 18:41:23 PST 2005 i686
Build Date:        Dec 23 2004 15:48:45
Configure Command: './configure' '--prefix=/usr' '--disable-static' '--with-apxs=/usr/sbin/apxs' '--sysconfdir=/etc' '--enable-discard-path' '--with-config-file-path=/etc/apache' '--enable-safe-mode' '--with-openssl' '--with-mhash' '--enable-bcmath' '--with-bz2' '--with-pic' '--enable-calendar' '--enable-ctype' '--with-gdbm' '--with-db3' '--enable-dbase' '--enable-ftp' '--with-iconv' '--with-exif' '--with-gd' '--enable-gd-native-ttf' '--with-jpeg-dir=/usr' '--with-png' '--with-gmp' '--with-mysql' '--with-gettext=shared,/usr' '--with-expat-dir=/usr' '--with-xml' '--enable-wddx' '--with-mm=/usr' '--enable-trans-sid' '--enable-shmop' '--enable-sockets' '--with-regex=php' '--enable-sysvsem' '--enable-sysvshm' '--enable-yp' '--enable-memory-limit' '--with-tsrm-pthreads' '--enable-shared' '--disable-debug' '--with-zlib=/usr'

Using php.ini-recommended, although this does NOT change why it's failing (tried falling back to -dist, but had the same problem). 

GDB backtrace is mostly irrelievent, and it was NOT built with debugging symbols. 

I believe that this can be solved by checking to see if the file exists.

Reproduce code:
---------------
Try connecting to MySQL using a non-existant local socket file. (i.e., /tmp/non-exist.sock)

Expected result:
----------------
When trying to run phpMyAdmin, I was expecting to see the login page.

Actual result:
--------------
Output from Bash trying to WGET it to see what happens:

user@computer:/# wget http://server/phpMyAdmin_folder/index.php
--11:35:05--  http://server/phpMyAdmin_folder/index.php
Resolving server... done.
Connecting to server[i.p.v.4]:80... connected.
HTTP request sent, awaiting response...
11:35:06 ERROR -1: No data received.

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 [2005-03-29 00:43 UTC] sniper@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip
 [2005-03-29 07:38 UTC] nofulfillment at numbinside dot net 
Installed, up and running. I'll try to remember to force the error to occur sometime tomorrow and report then.
 [2005-04-02 23:43 UTC] nofulfillment at numbinside dot net 
Ok, all appears to be working. Noteably, I didn't do many tests againts the new version, only one, so I guess you'll find out whenever you release 5.1. Best of luck. -Wes
 
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