[asterisk-bugs] [Asterisk 0019334]: ast_channel_set_caller_event reads from a free()'d pointer

[Asterisk Bug Tracker]

The following issue has been SUBMITTED. 
====================================================================== 
https://issues.asterisk.org/view.php?id=19334 
====================================================================== 
Reported By:                kobaz
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   19334
Category:                   Core/Channels
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.8.4 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2011-05-19 16:45 CDT
Last Modified:              2011-05-19 16:45 CDT
====================================================================== 
Summary:                    ast_channel_set_caller_event reads from a free()'d
pointer
Description: 
In ast_channel_set_caller_event in channel.c there is a check to see if the
callerid has changed. A copy of chan->caller is made and a deep char*
member inside is free()'d.  The old pointer is used in a comparison and
results in a read of memory that has been freed.

====================================================================== 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2011-05-19 16:45 kobaz          New Issue                                    
2011-05-19 16:45 kobaz          Asterisk Version          => 1.8.4           
2011-05-19 16:45 kobaz          Regression                => No              
2011-05-19 16:45 kobaz          SVN Branch (only for SVN checkouts, not tarball
releases) => N/A             
======================================================================