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Bug #23340 fopen on multiple urls from same server crashes
Submitted: 2003-04-25 04:05 UTC Modified: 2003-04-28 09:42 UTC
From: lucifer at vengeance dot et dot tudelft dot nl Assigned: wez (profile)
Status: Closed Package: HTTP related
PHP Version: 4CVS-2003-04-25 (stable) OS: Windows XP Pro
Private report: No CVE-ID: None
View Developer Edit
 [2003-04-25 04:05 UTC] lucifer at vengeance dot et dot tudelft dot nl 
this code causes a crash for me:

$urls[]="http://www.stichtingoikos.nl/";
$urls[]="http://www.wereldburgers.nl/";
$urls[]="http://www.stichtingoikos.nl/";
$urls[]="http://www.wereldburgers.nl/";
$urls[]="http://www.wereldburgers.nl/";

foreach($urls as $url) {
  $fp = fopen($url,"r");
  if($fp) fclose($fp);
}

notes:

1) it does not crash if i omit "if($fp) fclose($fp);"
2) the size of the url list needed for a crash could vary. for example, while above hosts resolve to the same IP, it also crashes for a list using different IPs; such a list for me had to be a couple of entries larger to crash.
3) i get a winxp "PHP Script Interpreter" crash dialog on the above code, though when working with bigger lists i occiasionally only got an Apache Internal Server error and no crash dialog

i tested this on 4.3.1 and 4.3.2-RC (2003-04-25)

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 [2003-04-25 04:10 UTC] lucifer at vengeance dot et dot tudelft dot nl 
if its of any use, the winxp error signature:

szAppName : php.exe
szAppVer : 4.3.2.2
szModName : php4ts.dll     
szModVer : 4.3.2.2
offset : 000ae419
 [2003-04-25 12:11 UTC] sniper@php.net 
I get this output (run in linux, using cli):

Warning: fclose(): 6 is not a valid stream resource in /www/apache-1.3.27/htdocs/t.php on line 13
[Fri Apr 25 20:10:05 2003]  Script:  't.php'
---------------------------------------
/usr/src/web/php/php4/Zend/zend_execute.h(44) : Block 0x0876A6D8 status:
Beginning:      Cached (allocated on /usr/src/web/php/php4/Zend/zend_execute.c:1601, 12 bytes)
      End:      OK
---------------------------------------
/usr/src/web/php/php4/ext/standard/http_fopen_wrapper.c(292) :  Freeing 0x0876D284 (18 bytes), script=t.php
 [2003-04-28 09:42 UTC] wez@php.net 
This bug has been fixed in CVS.

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