[asterisk-bugs] [Asterisk 0014858]: Regular segfault with chan_unistim

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=14858 
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Reported By:                barryf
Assigned To:                
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Project:                    Asterisk
Issue ID:                   14858
Category:                   Channels/chan_unistim
Reproducibility:            random
Severity:                   crash
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.0.7 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-04-08 07:44 CDT
Last Modified:              2009-04-21 04:08 CDT
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Summary:                    Regular segfault with chan_unistim
Description: 
Running Asterisk 1.6.0.8 on Ubuntu 8.10 Server. This same crash also
happens on 1.2.26 and 1.4.2x with the chan_unistim drivers. We have approx.
40 unistim handsets, in a callcenter environment. At least once a day,
Asterisk segfaults with the same gdb output.

It appears to happen during attended transfers, using the res_features
atxfer.

gdb output below.
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---------------------------------------------------------------------- 
 (0103517) barryf (reporter) - 2009-04-21 04:08
 http://bugs.digium.com/view.php?id=14858#c103517 
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Bump.

Does anyone know where I should be looking for a cause for this consistent
crash?

It appears that a null channel is being returned for some reason
(chan=0x0):

http://bugs.digium.com/view.php?id=3 0x0808f698 in __ast_queue_frame (chan=0x0,
fin=0xb6a85f24, head=0) at
channel.c:972

What could cause this? chan_unistim always seems to be involved when the
crasdh occurs, but it looks like the error is in Asterisk core...

Any help much appreciated.

-Barry 

Issue History 
Date Modified    Username       Field                    Change               
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2009-04-21 04:08 barryf         Note Added: 0103517                          
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