From: hexer at studentcenter dot org
Operating system: Linux 2.4
PHP version: 4.3.10
PHP Bug Type: MySQL related
Bug description: Memory leak in mysql extension
Description:
------------
There is a memory leak when any script that uses
mysql_connect is run.
The call to init_available_charsets() (libmysql/charset.c:177)
allocates some memory but the call to free_charsets()
is never made at the end of the script execution.
Reproduce code:
---------------
<?php
// replace params with your mysql host username and password
$db=mysql_connect("127.0.0.1","username","password");
mysql_close($db);
?>
Actual result:
--------------
valgrind --tool=memcheck --leak-check=yes --show-reachable=yes php
test.php
Valgrind output:
==20923== 64 bytes in 1 blocks are still reachable in loss record 1 of 1
==20923== at 0x1B900D20: malloc (vg_replace_malloc.c:131)
==20923== by 0x8091E71: my_malloc
(/usr/local/src/php-4.3.10/ext/mysql/libmysql/my_malloc.c:22)
==20923== by 0x809708A: init_dynamic_array
(/usr/local/src/php-4.3.10/ext/mysql/libmysql/array.c:35)
==20923== by 0x809949B: init_available_charsets
(/usr/local/src/php-4.3.10/ext/mysql/libmysql/charset.c:177)
Further notes:
The call to my_end() (libmysql/my_init.c) contains a call to
free_charsets() but my_end() is never called from anywhere.
Php was compiled with:
./configure --with-mysql \
--with-xml \
--with-apache=../apache_1.3.33 \
--enable-track-vars \
--with-gd \
--enable-discard-path \
--enable-bcmath \
--enable-gd-native-tt \
--with-freetype-dir=/usr/local \
--with-png-dir=/usr/local \
--with-jpeg-dir=/usr/local \
--with-zlib=/usr/local
------
-Hexer
--
Edit bug report at http://bugs.php.net/?id=31446&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=31446&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=31446&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=31446&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=31446&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=31446&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=31446&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=31446&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=31446&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=31446&r=support
Expected behavior: http://bugs.php.net/fix.php?id=31446&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=31446&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=31446&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=31446&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=31446&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=31446&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=31446&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=31446&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=31446&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=31446&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=31446&r=mysqlcfg
