[asterisk-bugs] [Asterisk 0017813]: Segmentation fault in scheduled event

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=17813 
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Reported By:                under
Assigned To:                
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Project:                    Asterisk
Issue ID:                   17813
Category:                   Channels/chan_sip/General
Reproducibility:            sometimes
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.0 - SECURITY ONLY! Test 1.6.2 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-08-08 07:16 CDT
Last Modified:              2010-08-08 07:21 CDT
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Summary:                    Segmentation fault in scheduled event
Description: 
This is continuation of  https://issues.asterisk.org/view.php?id=17497,
closed by dvossel.

It looks to me that fix by dvossel was incorrect, because actual fix is
backport from 1.6.2 or trunk. This is verified on production server with
500 real simultaneous calls on which this issue reproduced up to several
times a day, and stopped reproducing after attached patch.

What dvossel did is completely new functionality that is introduced in
asterisk and can cause regressions.
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 (0125692) under (reporter) - 2010-08-08 07:21
 https://issues.asterisk.org/view.php?id=17813#c125692 
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Attached patch fixes issues with segfaults in sip_t38_abort() and
transmit_provisional_keepalive(). 
Actually this patch is a backport from trunk.
I backported only relevant to t38 and provisional keepelive pieces of
code, because we didn't experience problems in other parts of similar code
and I don't want to put regressions there.
Patch is verified on production server with 500 calls (operation during 1
week without failures) 

Issue History 
Date Modified    Username       Field                    Change               
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2010-08-08 07:21 under          Note Added: 0125692                          
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