From: Federico Cuello <fedux at lugmen dot org dot ar>
Operating system: Linux
PHP version: 5.2.6
PHP Bug Type: SNMP related
Bug description: snmp extension memory leak
Description:
------------
The snmp extension leaks memory.
Reproduce code:
---------------
<?php
while(1) {
$oid = "HOST-RESOURCES-MIB::hrSystemUptime.0";
$data = snmpget('localhost', 'public' , $oid);
print "\n";
var_export($data);
}
?>
Expected result:
----------------
Memory use should not increment continuously.
Actual result:
--------------
Memory use increases.
Valgrind output:
==21733== 2,280 (432 direct, 1,848 indirect) bytes in 3 blocks are
definitely lost in loss record 64 of 67
==21733== at 0x4022998: malloc (in
/usr/lib/valgrind/x86-linux/vgpreload_memcheck.so)
==21733== by 0x45F01A3: _clone_pdu_header (in
/usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x45F0374: _clone_pdu (in /usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x45F0595: snmp_synch_input (in
/usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x4617F0B: _sess_process_packet (in
/usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x461A2DD: _sess_read (in /usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x461B1F8: snmp_sess_read (in
/usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x461B25B: snmp_read (in /usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x45EF7C1: snmp_synch_response_cb (in
/usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x45EF8A4: snmp_synch_response (in
/usr/lib/libnetsnmp.so.15.0.0)
==21733== by 0x818BBAA: php_snmp_internal (in /usr/lib/php5/bin/php)
==21733== by 0x818D910: php_snmp (in /usr/lib/php5/bin/php)
==21733== by 0x82CDC17: zend_do_fcall_common_helper_SPEC (in
/usr/lib/php5/bin/php)
==21733== by 0x82CCA2B: execute (in /usr/lib/php5/bin/php)
==21733== by 0x82ABE0B: zend_execute_scripts (in
/usr/lib/php5/bin/php)
==21733== by 0x8264941: php_execute_script (in /usr/lib/php5/bin/php)
==21733== by 0x83397C2: main (in /usr/lib/php5/bin/php)
--
Edit bug report at http://bugs.php.net/?id=45405&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=45405&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=45405&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=45405&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=45405&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=45405&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=45405&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=45405&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=45405&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=45405&r=support
Expected behavior: http://bugs.php.net/fix.php?id=45405&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=45405&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=45405&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=45405&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45405&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=45405&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=45405&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=45405&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=45405&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=45405&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=45405&r=mysqlcfg
