From: eric at wepay dot com
Operating system: CentOS
PHP version: 5.4.13
Package: Scripting Engine problem
Bug Type: Bug
Bug description:\0 causes error_log strings to be truncated
Description:
------------
A string containing "\0" passed into error_log() causes the message to be
truncated after that character. This is especially apparent when a log
message
contains a serialized object which has private properties, as their
serialization
key is \0classname\0propname.
file_put_contents is not affected, nor is using error_log with the
destination
parameter; only when using the ini setting.
Digging around through source, it looks like it's caused by the use of c
strlen()
in xbuf_format_converter (main/spprintf.c:576) which assumes
null-terminated
strings, called by vspprintf() -> ssprintf() -> php_log_err()
Happens in 5.4.x as well as a just-built git master 5.6.0-dev
Test script:
---------------
<?php
class a {
private $b = 'c';
}
$obj = new a;
$str = serialize($obj);
ini_set('error_log', '/Users/eric/Desktop/error_log.log');
error_log($str); // truncated
file_put_contents('/Users/eric/Desktop/fpc.log', $str); // ok
error_log($str, 3, '/Users/eric/Desktop/error_log_param.log'); // ok
Expected result:
----------------
All three files should contain the following string:
O:1:"a":1:{s:4:"ab";s:1:"c";}
(note that "ab" is actually "\0a\0b")
Hex dump:
4F 3A 31 3A 22 61 22 3A 31 3A 7B 73 3A 34 3A 22 00 61 00 62 22 3B 73 3A 31
3A 22
63 22 3B 7D
Actual result:
--------------
error_log.log contains only the following:
[16-Mar-2013 04:23:06 UTC] O:1:"a":1:{s:4:"
(the timestamp is not relevant)
4F 3A 31 3A 22 61 22 3A 31 3A 7B 73 3A 34 3A 22 0A
The other two files (error_log_param.log, fpc.log) correctly record the
full
string.
--
Edit bug report at https://bugs.php.net/bug.php?id=64439&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=64439&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=64439&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=64439&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64439&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64439&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64439&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64439&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64439&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64439&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64439&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=64439&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=64439&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64439&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64439&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64439&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64439&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64439&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64439&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64439&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64439&r=mysqlcfg
