[asterisk-bugs] [Asterisk 0015899]: crash on second 'dahdi destroy channel' if a var was set

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15899 
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Reported By:                tzafrir
Assigned To:                
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Project:                    Asterisk
Issue ID:                   15899
Category:                   Channels/chan_dahdi
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 218464 
Request Review:              
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Date Submitted:             2009-09-15 06:19 CDT
Last Modified:              2009-10-05 18:34 CDT
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Summary:                    crash on second 'dahdi destroy channel' if a var was
set
Description: 
dell*CLI> dahdi destroy channel 1
dell*CLI> dahdi destroy channel 2
dell*CLI>
Disconnected from Asterisk server
Executing last minute cleanups
Asterisk ending (0).

It will crash this way if any variable was set in chan_dahdi.conf using
setvar.

This is because of the following in chan_dahdi.c:11259 (function mkintf)

                if (conf->chan.vars) {
                        tmp->vars = conf->chan.vars;
                }

conf->chan.vars is thus common to all channels.

Fix should be to copy each variable seperately.
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 (0111888) jpeeler (administrator) - 2009-10-05 18:34
 https://issues.asterisk.org/view.php?id=15899#c111888 
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How about just freeing the vars only if the last channel is being
destroyed? 

Issue History 
Date Modified    Username       Field                    Change               
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2009-10-05 18:34 jpeeler        Note Added: 0111888                          
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