[asterisk-bugs] [DAHDI 0013044]: Kernel oops from NULL pointer dereference in ioctl_echocancel

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13044 
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Reported By:                jpeeler
Assigned To:                sruffell
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Project:                    DAHDI
Issue ID:                   13044
Category:                   dahdi (the module)
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     assigned
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Date Submitted:             2008-07-10 00:20 CDT
Last Modified:              2008-08-01 08:44 CDT
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Summary:                    Kernel oops from NULL pointer dereference in
ioctl_echocancel
Description: 
I set up the MG2 echo canceller module for use with my FXO device. I was
attempting to test echo using the Echo application. After dialing the
extension for Echo the line goes dead and DAHDI becomes unusable. Below is
the dmesg output.

Running on Fedora 9 using SVN r4593 from /dahdi/linux/trunk.

system.conf:
loadzone=us
defaultzone=us
echocanceler=MG2,3
fxsks=2
fxoks=3

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 (0090968) kpfleming (administrator) - 2008-08-01 08:44
 http://bugs.digium.com/view.php?id=13044#c90968 
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This has been corrected; jpeeler ran into it again yesterday and I tracked
down the problem in ioctl_echocancel(). 

Issue History 
Date Modified    Username       Field                    Change               
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2008-08-01 08:44 kpfleming      Note Added: 0090968                          
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