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Bug #74799 Memory leak in yaml_parse method
Submitted: 2017-06-22 15:27 UTC Modified: 2017-07-29 15:51 UTC
Votes:1
Avg. Score:4.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: gleb dot svitelskiy at gmail dot com Assigned: bd808 (profile)
Status: Closed Package: yaml (PECL)
PHP Version: 7.1.6 OS: Debian Jessie 8.8
Private report: No CVE-ID: None
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 [2017-06-22 15:27 UTC] gleb dot svitelskiy at gmail dot com 
Description:
------------
Each yaml_parse() method call with callback parameter doesn't free allocated memory.
When script is running for a long time fatal errors occurs.
It reproduce only with callback parameter. Even with empty array.

YAML Extension version 2.0.0
LibYAML version 0.1.6

[PHP Modules]
Core
ctype
curl
date
dom
fileinfo
filter
ftp
hash
iconv
json
libxml
mbstring
mysqlnd
openssl
pcre
PDO
pdo_sqlite
Phar
posix
readline
Reflection
session
SimpleXML
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
yaml
zlib



Test script:
---------------
php -r '$input="array:\n  key: !callback value\n"; $iterationsNumber=10; $ndocs=0; $i=0; function callback() {return "callback value";} $baseMemory=memory_get_usage(); while ($i<$iterationsNumber) {$i++; yaml_parse($input, 0, $ndocs, ["!callback" => "callback"]);$memory=memory_get_usage();echo "Memory consumed: ".$memory." Delta: ".($memory - $baseMemory)."\n";}'

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 [2017-07-29 15:51 UTC] bd808@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: bd808
 [2017-07-29 15:51 UTC] bd808@php.net 
The fix for this bug has been committed.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.

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Thank you for the report, and for helping us make PHP better.

https://github.com/php/pecl-file_formats-yaml/pull/28
 
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