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Bug #23402 mssql_bind : Unhandled exception
Submitted: 2003-04-29 05:38 UTC Modified: 2003-05-20 19:08 UTC
Votes:1
Avg. Score:3.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: Alla <svbevno at umailrusp dot am> Assigned:
Status: Closed Package: MSSQL related
PHP Version: 4.3.2RC2 OS: W2k
Private report: No CVE-ID: None
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From: Alla <svbevno at umailrusp dot am>
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 [2003-04-29 05:38 UTC] Alla <svbevno at umailrusp dot am>
BUG: mssql_bind() causes memory access violation.

The second call to mssql_bind (without mssql_init) leads to memory access violation: 'memory can not be written'.
mssql_init()
mssql_bind()
mssql_execute()
mssql_bind()     // !!!!!!! CRASH !!!!!!!
mssql_execute()

==========================================================
LOCATION:

Module             : php4ts.dll, 
File               : php_mssql.c
Line               : ! CRASH ! (see below)

Cause              : zend_hash_add(..) return NULL for the output variable 'bindp', and this is not checked in the code

Possible Fix       : add: if( NULL == bindp ) RETURN_FALSE;

Existing code source:

PHP_FUNCTION(mssql_bind)
{
  ........
  memset((void*)&bind,0,sizeof(mssql_bind));

  zend_hash_add( 
     statement->binds,
     Z_STRVAL_PP(param_name),
     Z_STRLEN_PP(param_name),
     &bind,sizeof(mssql_bind),
     (void **)&bindp );         // bindp == NULL here!

  bindp->zval = *var;           // !!!!!! CRASH !!!!!!!

  zval_add_ref(var);

  if(.....) 
  {
    ......
  }

  RETURN_TRUE;
}

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 [2003-04-30 06:00 UTC] sniper@php.net
What does phpinfo() say about php version?

 [2003-04-30 10:49 UTC] Alla <svbevno at umailrusp dot am>
phpinfo()
Build Date         Apr 26 2003 18:46:51  
Server             API  CGI/FastCGI  
PHP API            20020918  
PHP Extension      20020429  
Zend Extension     20021010  
Debug Build        no  
Thread Safety      enabled  
Registered PHP     Streams  php, http, ftp, compress.zlib
 [2003-04-30 12:04 UTC] derick@php.net
This doesn't say ANYTHING about the version number. You're looking for the 4.x.x number in the top corner.


 [2003-04-30 12:16 UTC] Alla <svbevno at umailrusp dot am>
PHP version is 4.3.2-RC
 [2003-05-20 19:08 UTC] fmk@php.net
This bug has been fixed in CVS.

In case this was a PHP problem, snapshots of the sources are packaged
every three hours; this change will be in the next snapshot. You can
grab the snapshot at http://snaps.php.net/.
 
In case this was a documentation problem, the fix will show up soon at
http://www.php.net/manual/.

In case this was a PHP.net website problem, the change will show
up on the PHP.net site and on the mirror sites in short time.
 
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