PHP :: Bug #73729 :: out of memory while doing session

Bug #73729

out of memory while doing session_start(session handler memcache)

Submitted:

2016-12-13 06:49 UTC

Modified:

2021-03-25 16:46 UTC

Votes:	9
Avg. Score:	4.7 ± 0.7
Reproduced:	9 of 9 (100.0%)
Same Version:	5 (55.6%)
Same OS:	4 (44.4%)

From:

mahesh dot patade at network18tech dot com

Assigned:

cmb (profile)

Status:

Closed

Package:

memcache (PECL)

PHP Version:

7.0.14

OS:

CentOS 6.5

Private report:

CVE-ID:

None

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From:	mahesh dot patade at network18tech dot com
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New/Additional Comment:

[2016-12-13 06:49 UTC] mahesh dot patade at network18tech dot com

Description:
------------
PHP Version details:

php-7.0.14-1.el6.remi.x86_64
php-cli-7.0.14-1.el6.remi.x86_64
php-common-7.0.14-1.el6.remi.x86_64
php-devel-7.0.14-1.el6.remi.x86_64
php-gd-7.0.14-1.el6.remi.x86_64
php-imap-7.0.14-1.el6.remi.x86_64
php-json-7.0.14-1.el6.remi.x86_64
php-mbstring-7.0.14-1.el6.remi.x86_64
php-mcrypt-7.0.14-1.el6.remi.x86_64
php-mysqlnd-7.0.14-1.el6.remi.x86_64
php-odbc-7.0.14-1.el6.remi.x86_64
php-pdo-7.0.14-1.el6.remi.x86_64
php-pear-1.10.1-8.el6.remi.noarch
php-pear-Auth-SASL-1.0.6-1.el6.remi.noarch
php-pear-Mail-1.3.0-1.el6.remi.noarch
php-pear-Net-SMTP-1.7.2-1.el6.remi.noarch
php-pear-Net-Socket-1.0.14-1.el6.remi.noarch
php-pecl-apcu-5.1.7-1.el6.remi.7.0.x86_64
php-pecl-apcu-bc-1.0.3-1.el6.remi.7.0.x86_64
php-pecl-igbinary-2.0.0-1.el6.remi.7.0.x86_64
php-pecl-mailparse-3.0.2-1.el6.remi.7.0.x86_64
php-pecl-memcache-3.0.9-0.7.20161124gitdf7735e.el6.remi.7.0.x86_64
php-pecl-msgpack-2.0.2-1.el6.remi.7.0.x86_64
php-pecl-redis-3.0.0-1.el6.remi.7.0.x86_64
php-pecl-zip-1.13.5-1.el6.remi.7.0.x86_64
php-process-7.0.14-1.el6.remi.x86_64
php-soap-7.0.14-1.el6.remi.x86_64
php-xml-7.0.14-1.el6.remi.x86_64
php-xmlrpc-7.0.14-1.el6.remi.x86_64

List of modules:
apc
apcu
bz2
calendar
Core
ctype
curl
date
dom
exif
fileinfo
filter
ftp
gd
gettext
hash
iconv
igbinary
imap
json
libxml
mailparse
mbstring
mcrypt
memcache
msgpack
mysqli
mysqlnd
odbc
openssl
pcntl
pcre
PDO
pdo_mysql
PDO_ODBC
pdo_sqlite
Phar
posix
readline
redis
Reflection
session
shmop
SimpleXML
soap
sockets
SPL
sqlite3
standard
sysvmsg
sysvsem
sysvshm
tokenizer
wddx
xml
xmlreader
xmlrpc
xmlwriter
xsl
zip
zlib

PHP.INI
session.save_handler = memcache
session.save_path = "tcp://172.29.31.11:11211,tcp://172.29.31.15:11211,tcp://172.29.31.16:11211,tcp://172.29.31.17:11211,tcp://172.29.31.18:11211,tcp://172.29.31.19:11211,tcp://172.29.31.20:11211,tcp://172.29.31.111:11211,tcp://172.29.31.112:11211,tcp://172.29.31.113:11211,tcp://172.29.31.114:11211,tcp://172.29.31.115:11211,tcp://172.29.31.116:11211,tcp://172.29.31.117:11211,tcp://172.29.31.118:11211,tcp://172.29.31.119:11211,tcp://172.29.31.120:11211,tcp://172.29.31.121:11211"

Test script:
---------------
While setting simple session we are getting 500 with below error.
<?php session_start(); ?>


PHP Fatal error:  Out of memory (allocated 2097152) (tried to allocate 18446744073709551612 bytes) in

Patches

Pull Requests

History

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[2016-12-15 12:31 UTC] dl at europaymentgroup dot com

I think this is the same as https://bugs.php.net/bug.php?id=73539

[2016-12-15 13:35 UTC] mahesh dot patade at network18tech dot com

PHP version is diffrent.

[2017-01-12 13:07 UTC] angel dot moreno at urv dot cat

We had the same behavior after applying the latest updates of some php7* packages on Ubuntu 16.04. Meanwhile, our solution has been changing the method for managing sessions (session.save_handler).

Updates were:
(from 7.0.8-0ubuntu0.16.04.3 to 7.0.13-0ubuntu0.16.04.1)

php7.0-cli: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-gd: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-opcache: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-common: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-json: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-mbstring: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-readline: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-xml: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-curl: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-zip: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-mcrypt: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
libapache2-mod-php7.0: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)
php7.0-mysql: amd64 (7.0.8-0ubuntu0.16.04.3, 7.0.13-0ubuntu0.16.04.1)

PHP version:

  7.0.13-0ubuntu0.16.04.1 PHP (cli) (NTS)
  Copyright (c) 1997-2016 The PHP Group
  Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
      OPcache v7.0.13-0ubuntu0.16.04.1 with Zend, Copyright (c) 1999-2016, by Zend Technologies

Information of memcache module (cut from php -i):

  Memcache

  Memcache support => enabled
  Version => 3.0.9-dev
  Revision => $ Revision $

  Directive => Local Value => Master Value
  memcache.allow_failover => 1 => 1
  memcache.chunk_size => = 32768> 32768
  memcache.compress_threshold => = 20000> 20000
  memcache.default_port => = 11211> 11211
  memcache.hash_function => CRC32 => CRC32
  memcache.hash_strategy => consistent => consistent
  memcache.lock_timeout => 15 => 15
  memcache.max_failover_attempts => 20 => 20
  memcache.protocol => ascii => ascii
  memcache.redundancy => 1 => 1
  memcache.session_redundancy => 2 => 2

In Apache's error log we have messages like:

[Thu Jan 12 13:29:59.444784 2017] [:error] [pid 23281] [client xxxx:53788] PHP Fatal error: Out of memory (allocated 2097152) (tried to Allocate 18446744073709551612 bytes) in /x/x/x/lib/vendor/zf1/zend-session/library/Zend/Session.php on line 482

Line 482 contains a session_start().

[2021-03-25 16:46 UTC] cmb@php.net

-Status: Open +Status: Closed -Assigned To: +Assigned To: cmb

[2021-03-25 16:46 UTC] cmb@php.net

The official bug tracker for PECL/memcache is now at
<https://github.com/websupport-sk/pecl-memcache/issues>.

So, if this is still an issue with either of the current memcache
versions (4 or 8), please file an issue there.

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