From:             
Operating system: Windows Server 2008 R2 x64
PHP version:      5.3.9
Package:          Unknown/Other Function
Bug Type:         Bug
Bug description:null pointer dereference in php_win32_free_rng_lock()

Description:
------------
If php_win32_get_random_bytes() has never been called, then this line of
code:

+       CryptReleaseContext(hCryptProv, 0);

passes a null pointer, resulting in a C0000005 exception in 
CryptReleaseContext().  This line should be preceded by:

        if (has_crypto_ctx)

This was specifically tested with the windows.php.net 32-bit TS build
running on 
64-bit Windows.  I do not know how it behaves in other configurations.


Test script:
---------------
I do not have a short test case, but the bug is pretty obvious.


-- 
Edit bug report at https://bugs.php.net/bug.php?id=60895&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=60895&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=60895&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=60895&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=60895&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=60895&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=60895&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=60895&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=60895&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=60895&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=60895&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=60895&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=60895&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=60895&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=60895&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=60895&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=60895&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=60895&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=60895&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=60895&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=60895&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=60895&r=mysqlcfg

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