[asterisk-bugs] [Asterisk 0019116]: [patch] Crash while transfering a call during DTMF feature timeout.

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=19116 
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Reported By:                Irontec
Assigned To:                rmudgett
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Project:                    Asterisk
Issue ID:                   19116
Category:                   Resources/res_features
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     closed
Asterisk Version:           1.8.3.2 
JIRA:                       SWP-3332 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2011-04-13 12:03 CDT
Last Modified:              2011-05-25 11:23 CDT
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Summary:                    [patch] Crash while transfering a call during DTMF
feature timeout.
Description: 
When a call is being attended transfered during the time between 
AST_FRAME_DTMF_BEGIN and AST_FRAME_DTMF_END, transfered channel becomes
zombie (so tech data is not available), making ast_dtmf_stream segfault
when tries to send the DTMF digit (at least with SIP channels). 



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---------------------------------------------------------------------- 
 (0135389) svnbot (reporter) - 2011-05-25 11:23
 https://issues.asterisk.org/view.php?id=19116#c135389 
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Repository: asterisk
Revision: 320796

U   branches/1.8/include/asterisk/channel.h
U   branches/1.8/main/channel.c
U   branches/1.8/main/features.c

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r320796 | rmudgett | 2011-05-25 11:23:12 -0500 (Wed, 25 May 2011) | 17
lines

Give zombies a safe channel driver to use.

Recent crashes from zombie channels suggests that they need a safe home to
goto.  When a masquerade happens, the physical part of the zombie channel
is hungup.  The hangup normally sets the channel private pointer to NULL.
If someone then blindly does a callback to the channel driver, a crash is
likely because the private pointer is NULL.

The masquerade now sets the channel technology of zombie channels to the
kill channel driver.

Related to the following issues:
(issue https://issues.asterisk.org/view.php?id=19116)
(issue https://issues.asterisk.org/view.php?id=19310)

Review: https://reviewboard.asterisk.org/r/1224/

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http://svn.digium.com/view/asterisk?view=rev&revision=320796 

Issue History 
Date Modified    Username       Field                    Change               
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2011-05-25 11:23 svnbot         Note Added: 0135389                          
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