#25657 [Fbk->Opn]: instability : iis is reseted automatically frequently

ID: 25657 User updated by: info at xboot dot de Reported By: info at xboot dot de -Status: Feedback +Status: Open Bug Type: IIS related Operating System: windows 2003 PHP Version: 4.3.3 New Comment: Not enough information? I posted a lot at http://bugs.php.net/bug.php?id=24534. What happens: After upgrading Php 4.1 to 4.32 Php crashes erratic. The error occures 3 - 10 times a day. We use the modules mysql, mssql, curl and gd. I can't locate the reason of the crash - it is very strange. I can call a Php Skript (it doesn't matter which script, error occures on several scripts) several times and everything works fine. But suddenly the same script causes the crash. When error occures the following message is displayed on browser: "Php has encountered an access violation at..." In the event-log I found this: A process serving application pool 'DefaultAppPool' terminated unexpectly. The process id was '...'. The process exit code was '0xc0000005'. I've tried a lot: Installing Php on three different machines with a clean OS (and different Php versions > 4.2), playing arround with IIS-settings, enable and disable Zend-Optimizer. We actually use the latest PHP Version (4.3.3, ISAPI) on Windows 2003 Standard Edition. Error is still present. Microsoft gave me now the following informations: =========================================================== Because PHP doesn't ship with debug symbols the information the information we can see it very limited. So what can we see: (d40.a3c): Access violation - code c0000005 (!!! second chance !!!) eax=ffffffff ebx=77f470fe ecx=783b398b edx=00000007 esi=02ecf928 edi=02ecf968 eip=01cf3e65 esp=02ecf91c ebp=02ecf970 iopl=0 nv up ei ng nz na po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010286 *** WARNING: Unable to verify checksum for php4ts.dll *** ERROR: Symbol file could not be found. Defaulted to export symbols for php4ts.dll - php4ts!php_request_startup+0x1b5: 01cf3e65 8b7c91fc mov edi,[ecx+edx*4-0x4] ds:0023:783b39a3=????? 0:019> kv ChildEBP RetAddr Args to Child WARNING: Stack unwind information not available. Following frames may be wrong. 02ecf970 100044d0 77f470fe 00d99618 5a322b54 php4ts!php_request_startup+0x1b5 000003ff 00000000 00000000 00000000 00000000 php4isapi!DllMain+0x24b0 PHP crashes because it tries to reference unallocated memory (this basically would rule out a hardware error). This happens immediately after he ISAPI is loaded so I doubt that it is related to a particular script So looking at the first parameter passed php_request_startup it looks like a pointer is passed in. 0:019> dc 77f470fe 77f470fe 783b398b f4850f04 3bfffffc ec850ffa .9;x.......;.... The derefenced value is then copied to the ecx register which seems to be a pointer again and it already points to unreferenced memory. The access violation actually happens after doing some pointer arithmetic (taking the value of ecx and adding 7 DWORD's - 1 DWORD) =========================================================== Is that enough information? Please tell me what I can do to get the informations you need. Previous Comments: ------------------------------------------------------------------------ [2003-09-25 10:55:40] sniper@php.net Not enough information was provided for us to be able to handle this bug. Please re-read the instructions at http://bugs.php.net/how-to-report.php If you can provide more information, feel free to add it to this bug and change the status back to "Open". Thank you for your interest in PHP. ------------------------------------------------------------------------ [2003-09-25 10:45:46] info at xboot dot de Description: ------------ I posted my problems two months ago at bug report nr. 24534: http://bugs.php.net/bug.php?id=24534 But I wasn't the original submitter so I opened a new report. I actually use the latest version of PHP, but the problem still exists. The manufacturer of the server checked the hardware - says the hardware is ok. I used DebugIIS and was sending the dump to Microsoft. They say it is a PHP problem - in no case IIS or hardware. They gave me the following analysis: Access violation - code c0000005 (!!! second chance !!!) eax=ffffffff ebx=77f470fe ecx=783b398b edx=00000007 esi=02ecf928 edi=02ecf968 eip=01cf3e65 esp=02ecf91c ebp=02ecf970 iopl=0 nv up ei ng nz na po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010286 *** WARNING: Unable to verify checksum for php4ts.dll *** ERROR: Symbol file could not be found. Defaulted to export symbols for php4ts.dll - php4ts!php_request_startup+1b5: 01cf3e65 8b7c91fc mov edi,[ecx+edx*4-0x4] ds:0023:783b39a3=???????? 0:019> kv ChildEBP RetAddr Args to Child WARNING: Stack unwind information not available. Following frames may be wrong. 02ecf970 100044d0 77f470fe 00d99618 5a322b54 php4ts!php_request_startup+0x1b5 000003ff 00000000 00000000 00000000 00000000 php4isapi!DllMain+0x24b0 0:019> da 100044d0 100044d0 "PHP has encountered an Access Vi" 100044f0 "olation at %p" Hope this will help you locate the error. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=25657&edit=1