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Bug #68754 AV with mysqli doc ref
Submitted: 2015-01-05 22:42 UTC Modified: 2021-08-22 04:22 UTC
From: mattficken@php.net Assigned: cmb (profile)
Status: No Feedback Package: MySQLi related
PHP Version: 5.6.4 OS: Windows
Private report: No CVE-ID: None
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 [2015-01-05 22:42 UTC] mattficken@php.net 
Description:
------------
mysqli extension calls php_error_docref which calls efree resulting in AV (null pointer read).

Stack traces of user-mode application crashes on Windows can (with user consent) be reported to Microsoft (see Windows Error Reporting and Watson). This bug is based on one of those reports.

Reported on 5.6.0 (could affect 5.6.4) php-cgi X86 NTS. 

Watson #73492878194   

Actual result:
--------------
0170e350 0fc6e2bb php5!_efree+0x165 [c:\php-sdk\php56\vc11\x86\php-5.6.0\zend\zend_alloc.c @ 2440]
0170e398 0fc6d71b php5!php_verror+0x1bb [c:\php-sdk\php56\vc11\x86\php-5.6.0\main\main.c @ 944]
0170e3b0 6ed88b4c php5!php_error_docref0+0x1b [c:\php-sdk\php56\vc11\x86\php-5.6.0\main\main.c @ 958]
0170e3d8 6ed8ce70 php_mysqli!php_mysqli_throw_sql_exception+0x3c [c:\php-sdk\php56\vc11\x86\php-5.6.0\ext\mysqli\mysqli_exception.c @ 51]
0170e454 6ed86697 php_mysqli!mysqli_common_connect+0xb800 [c:\php-sdk\php56\vc11\x86\php-5.6.0\ext\mysqli\mysqli_nonapi.c @ 250]
0170e46c 0fc638c2 php_mysqli!zif_mysqli_real_connect+0x17 [c:\php-sdk\php56\vc11\x86\php-5.6.0\ext\mysqli\mysqli_api.c @ 1947]
0170e4c0 0fc63093 php5!zend_do_fcall_common_helper_SPEC+0x122 [c:\php-sdk\php56\vc11\x86\php-5.6.0\zend\zend_vm_execute.h @ 558]
0170e4f8 0fc874ee php5!execute_ex+0x2a3 [c:\php-sdk\php56\vc11\x86\php-5.6.0\zend\zend_vm_execute.h @ 363]
0170e51c 0fc8734e php5!zend_execute+0x14e [c:\php-sdk\php56\vc11\x86\php-5.6.0\zend\zend_vm_execute.h @ 388]
0170e550 0fc8894c php5!zend_execute_scripts+0xde [c:\php-sdk\php56\vc11\x86\php-5.6.0\zend\zend.c @ 1330]
0170e74c 00000000 php5!php_execute_script+0x14c [c:\php-sdk\php56\vc11\x86\php-5.6.0\main\main.c @ 2584]

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 [2021-08-09 10:33 UTC] cmb@php.net
-Status: Open +Status: Feedback -Assigned To: +Assigned To: cmb
 [2021-08-09 10:33 UTC] cmb@php.net 
Does this still happen with any of the actively supported PHP
versions[1]?

[1] <https://www.php.net/supported-versions.php>
 [2021-08-22 04:22 UTC] php-bugs at lists dot php dot net 
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.
 
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