[asterisk-bugs] [Asterisk 0012453]: [patch] British Telecom line testing causes segfault on chan_zap.c

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A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=12453 
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Reported By:                Alex728
Assigned To:                Corydon76
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Project:                    Asterisk
Issue ID:                   12453
Category:                   Channels/chan_zap
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.19 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             04-15-2008 19:39 CDT
Last Modified:              06-19-2008 17:46 CDT
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Summary:                    [patch] British Telecom line testing causes segfault
on chan_zap.c
Description: 
Telephone lines in the UK are subjected to various automatic line tests in
the evening. These include a polarity reversal, and alternate application
of earth and battery (-48V) to the A and B wires (Tip and ring) 

Since version 1.4.18 of Asterisk, these conditions are detected first as a
spurious zaptel alarm, then a polarity reversal before caller ID. For some
reason this causes chan_zap.c to crash with a segmentation fault.

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---------------------------------------------------------------------- 
 svnbot - 06-19-08 17:46  
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Repository: asterisk
Revision: 124182

U   branches/1.4/channels/chan_dahdi.c

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r124182 | tilghman | 2008-06-19 17:46:17 -0500 (Thu, 19 Jun 2008) | 7
lines

It's possible for a hangup to be received, even just after the initial cid
spill.
(closes issue http://bugs.digium.com/view.php?id=12453)
 Reported by: Alex728
 Patches: 
       20080604__bug12453.diff.txt uploaded by Corydon76 (license 14)

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http://svn.digium.com/view/asterisk?view=rev&revision=124182 

Issue History 
Date Modified   Username       Field                    Change               
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06-19-08 17:46  svnbot         Note Added: 0088984                          
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