php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #68908 Invalid free in ext/opcache/zend_persist.c
Submitted: 2015-01-24 20:05 UTC Modified: 2015-01-24 23:33 UTC
From: bugreports at internot dot info Assigned:
Status: Not a bug Package: opcache
PHP Version: 5.5.21 OS: Linux Ubuntu 14.04
Private report: No CVE-ID: None
View Developer Edit
Welcome! If you don't have a Git account, you can't do anything here.
If you reported this bug, you can edit this bug over here.
(description)
Block user comment
Status: Assign to:
Package:
Bug Type:
Summary:
From: bugreports at internot dot info
New email:
PHP Version: OS:

 

 [2015-01-24 20:05 UTC] bugreports at internot dot info
Description:
------------
Hi,

In /ext/opcache/zend_persist.c:


This is in a while() loop, so this is possible I think:



 82                        p->pData = &p->pDataPtr;



 79                        zend_accel_store(p->pData, el_size);

which frees p->pData, but it is a (void), which cannot hold memory.


Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2015-01-24 22:41 UTC] stas@php.net
-Status: Open +Status: Feedback
 [2015-01-24 22:41 UTC] stas@php.net
Could you please explain what you mean? " a (void), which cannot hold memory" doesn't make much sense to me, sorry - p->pData is a pointer, and I don't see any problem with it in either line 79 or line 82.
 [2015-01-24 23:16 UTC] bugreports at internot dot info
-Status: Feedback +Status: Open
 [2015-01-24 23:16 UTC] bugreports at internot dot info
&p->pDataPtr
is a non-heap object.
 [2015-01-24 23:33 UTC] stas@php.net
-Summary: Invalid free +Summary: Invalid free in ext/opcache/zend_persist.c -Status: Open +Status: Not a bug -Type: Security +Type: Bug
 [2015-01-24 23:33 UTC] stas@php.net
But p is reset each loop iteration, so I don't see how the same p->pData from previous loop in line 82 can appear in line 79 in the next loop.
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved.
Last updated: Thu Oct 31 23:01:28 2024 UTC