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Bug #68906 Use after free
Submitted: 2015-01-24 19:58 UTC Modified: 2015-01-24 21:47 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
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 [2015-01-24 19:58 UTC] bugreports at internot dot info 
Description:
------------
Hi,

In /ext/opcache/zend_shared_alloc.c:

'source' is freed:

350                interned_efree((char*)source);
351        }

   but then used:
352        zend_shared_alloc_register_xlat_entry(source, retval);


thanks

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 [2015-01-24 21:47 UTC] stas@php.net
-Status: Open +Status: Not a bug
 [2015-01-24 21:47 UTC] stas@php.net 
I don't see any issue there - zend_shared_alloc_register_xlat_entry() does not dereference the pointer, only uses its value.
 [2015-01-24 21:47 UTC] stas@php.net
-Type: Security +Type: Bug
 
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