#15333 [Com]: strndup access violation

ID: 15333 Comment by: tshazli@linuxmail.org Reported By: david@harksystems.com Status: Open Bug Type: IIS related Operating System: Windows 2000 Pro PHP Version: 4.2.1 New Comment: Ok, here is the thing: I have 2 servers load balancing each other. had this problem with one of our servers (PIII dual processor) but not with the other which is a single processor. I tried to format the server, reinstall everything all over again, not apply microsoft patches/fixes...etc. still the problem occurs ONLY on the dual processor server. Then I tried to take one processor out of that box and guess what...IT worked flawlessly. I stress tested it with heavy load test for hours and not once I got the error ever again. I put the processor back to the box and tested it. I got the error again. I tried that many times. Always get the error with dual processor but not even once with single processor. So how to work around the problem? use single processor server. What causes the problem? dont know..It is between PHP and IIS. I am trying to find out the problem by debuging the services but if anyone is interested in reproducing the problem and trying to debug it, use dual processor with win2000 server and IIS5 with any php ver >=4.2.1 and use ADODB or MSSQL connections. Stress test it and you will get the error. Previous Comments: ------------------------------------------------------------------------ [2002-09-05 00:14:11] home@NOSPAMwebpanache.com Hi, Just to contribute had PHP with ISAPI dll working fine until a few days ago. It seems that applying the lastest Microsoft security fixes created the problem. The latest applied fix was MS02-048.... ------------------------------------------------------------------------ [2002-08-29 08:30:41] jean-francois_larvoire@hp.com Hello, I have the same problem too. And it is reproductible. This is with the ISAPI version of PHP 4.2.2 under Windows XP. I get the following error message in the XP Error Log, when trying to access a page from another PC. A copy of the test file that causes the problem is at http://jf.larvoire.free.fr/calendrier.php3. Pressing on the "Next month" button crashes the PHP DLL. Jean-Francois Larvoire vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv The HTTP server encountered an unhandled exception while processing the ISAPI Application ' php4ts!zend_strndup + 0x2B + 0x17C99F70 '. For additional information specific to this message please visit the Microsoft Online Support site located at: http://www.microsoft.com/contentredirect.asp. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------------------------------------------------------------ [2002-08-20 20:15:00] stan.noSPAM_@noSPAM_.daft.cc Win2k Server, latest security patches IIS 5.0 PHP 4.2.2 ISAPI Connections to both mySQL, MSSQL. Cookie and session usage. The error of which I was receiving after about 15 page views: "PHP has encountered an Access Violation at 011929AE" was solved by... 1. updating all DLLs by copying DLLs included with PHP into C:\winnt\system32 2. having php4isapi.dll in both my ISAPI Filters and Home Directory > Configuration (under the Site properties) 3. setting Application Protection to Low (IIS Process) 4. restarting the server After doing the above, I haven't seen the error since. ------------------------------------------------------------------------ [2002-08-14 13:41:02] tgannon@colliers-seeley.com Hello, I can't come up with a working test case but I have an idea which might help narrow the search. I have two PHP applications, one of which works fine in IIS and the other of which causes this bug frequently. The only significant difference that I can find between the two apps is that the one that hangs IIS uses sessions and cookies, whereas the stable one does not. I removed the calls to session_start and session_register from the unstable one, and after some testing it appears to still work. I'll give an update after some more testing has been done. Windows 2000 Server, Service pack 3 + .NET Framework (sp2) PHP 4.2.2 as ISAPI ------------------------------------------------------------------------ [2002-07-26 14:10:17] agustinchernitsky@hotmail.com James, Win2K 2.00.2195 SP2 IIS 5.0.2195.2966 PHP 4.2.1 Create a Web Site with ISAPI, make the PHP do some lookups in MySQL (Install PHPMyAdmin). That should do it... No security Service Packs are Installed, Just SP2. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/15333 -- Edit this bug report at http://bugs.php.net/?id=15333&edit=1