From: patrick at borgeat dot de
Operating system: Windows 2000 SR4
PHP version: 5.0.0b4 (beta4)
PHP Bug Type: Filesystem function related
Bug description: fread crashes Apache with mistakenly big length
Description:
------------
As I mistakenly tried to read a very large number of bytes (1078508183)
(more than are in the file) with fread, the Site doesn't react anymore and
i get a apache.exe Task in my Tasklist consuming an average of 80% CPU
Load (with a 1300 Mhz Machine) which can't be stopped (maybe also due to
missing rights). Also the file is blocked.
Never tested this on Linux, but I think if a server does this mistakenly
several times at once the whole server enviroment would crash.
I run Apache 2.0.48 with PHP 5.0.0b4 as Apache2 Handler on Windows 2000
SR4 on FAT32 Filesystem.
Reproduce code:
---------------
(in my case test was a textfile with the 3 Letters "AAA")
<?
$fp = fopen("test",r");
$res = fread($fp,1078508183);
echo $res
fclose($fp);
?>
Expected result:
----------------
I expected PHP to be as smart (as it is with smaller numbers for example
like 50 000) to write only 3 Bytes and output "AAA".
Actual result:
--------------
Apache Task isn't stopable and runs @ Average of 80% CPU Load
--
Edit bug report at http://bugs.php.net/?id=27511&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27511&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27511&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27511&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27511&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27511&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27511&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27511&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27511&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27511&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27511&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27511&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27511&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27511&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27511&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27511&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27511&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27511&r=float
