From: emchen at isc dot upenn dot edu
Operating system: Linux 2.6.9 / RHEL4
PHP version: 5.1.2
PHP Bug Type: Unknown/Other Function
Bug description: syslog will output garbage from apache child process memory
Description:
------------
the bug is a bit difficult to explain, it revolves around an apache child
process handling multiple PHP requests that use openlog/syslog.
the behavior of the bug is described in bug #28722 and bug #35777, namely
garbage appearing as the process name / ident field in syslog.
the bug occurs when an apache child process handles a script that makes an
openlog called followed by a script that makes a syslog called without
openlog (separate requests).
Reproduce code:
---------------
to recreate bug:
1.) set Apache (forking) MaxClients 1
2.) call php script with:
<?
syslog(LOG_WARNING,"testing");
?>
3.) call php script with:
<?
openlog("MYLOG",LOG_PID,LOG_LOCAL0);
syslog(LOG_WARNING,"this is a warning");
?>
4.) call php script with:
<?
phpinfo();
?>
4.) call php script with:
<?
syslog(LOG_WARNING,"testing");
?>
Expected result:
----------------
in the attached code; the calls to syslog in step 2,3 produce normal
output, output from step 4 should be garbage.
since the apache child process persists beyond the execution of the PHP
scripts, step 4 picks up the results of the openlog call in step 2. when
sylog gets called the 3rd time the reference to "ident" is garbage.
Actual result:
--------------
user.log: Mar 20 16:54:15 [host] httpd: testing
local0.log: Mar 20 16:56:41 [host] MYLOG[18679]: this is a warning
local0.log: Mar 20 16:58:57 [host] [garbage][18679]: testing
--
Edit bug report at http://bugs.php.net/?id=36808&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=36808&r=trysnapshot44
Try a CVS snapshot (PHP 5.1):
http://bugs.php.net/fix.php?id=36808&r=trysnapshot51
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=36808&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=36808&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=36808&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=36808&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=36808&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=36808&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=36808&r=support
Expected behavior: http://bugs.php.net/fix.php?id=36808&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=36808&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=36808&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=36808&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=36808&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=36808&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=36808&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=36808&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=36808&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=36808&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=36808&r=mysqlcfg
