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

[noreply at bugs.digium.com]

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:             07-10-2008 00:20 CDT
Last Modified:              07-10-2008 15:32 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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---------------------------------------------------------------------- 
 sruffell - 07-10-08 15:32  
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jpeeler, could you try applying patch 13044-1.patch and see if there is any
additional debug information.  When I tried a quick run on my setup with
the mg2 echocanceller, I didn't see any problems. 

You will need to rename 'echocanceler' to 'echocanceller' in
/etc/dahdi/system.conf when you update to at least revision 4590 of
https://svn.digium.com/svn/dahdi/linux/trunk. 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
07-10-08 15:32  sruffell       Note Added: 0090041                          
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