[asterisk-bugs] [Asterisk 0012346]: null pointer in chan_skinny when 'regcontext' used

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=12346 
====================================================================== 
Reported By:                candlerb
Assigned To:                mvanbaak
====================================================================== 
Project:                    Asterisk
Issue ID:                   12346
Category:                   Channels/chan_skinny
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     assigned
Asterisk Version:           SVN 
SVN Branch (only for SVN checkouts, not tarball releases): 1.6.0 
SVN Revision (number only!): 111962 
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             04-01-2008 03:57 CDT
Last Modified:              04-01-2008 13:44 CDT
====================================================================== 
Summary:                    null pointer in chan_skinny when 'regcontext' used
Description: 
Uncomment the 'regcontext' example line from skinny.conf, wait for a Cisco
phone to connect, and Asterisk dumps core.

GDB output:

...
[New Thread -1215501408 (LWP 12516)]
    -- Starting Skinny session from 10.69.255.249
    -- Added extension '110' priority 1 to skinnyregistrations

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1215501408 (LWP 12516)]
ast_add_extension2 (con=0x86d1a88, replace=1, extension=0xb78ce1c0 "110",
    priority=Variable "priority" is not available.
) at pbx.c:6056
6056                            if (x->exten) { /* this test for safety
purposes */
(gdb) bt
http://bugs.digium.com/view.php?id=0  ast_add_extension2 (con=0x86d1a88,
replace=1, extension=0xb78ce1c0
"110",
    priority=Variable "priority" is not available.
) at pbx.c:6056
http://bugs.digium.com/view.php?id=1  0x080e4f71 in ast_add_extension
(context=0x363840
"skinnyregistrations",
    replace=141620640, extension=0x870f5a0 "??p\b", priority=141620640,
    label=0x870f5a0 "??p\b", callerid=0x870f5a0 "??p\b",
    application=0x870f5a0 "??p\b", data=0x870f5a0, datad=0x870f5a0,
    registrar=0x870f5a0 "??p\b") at pbx.c:5859
http://bugs.digium.com/view.php?id=2  0x00359a6f in handle_message
(req=0x870f180, s=0x870e600)
    at
/home/candlerb/svn/asterisk/branches/1.6.0/include/asterisk/utils.h:502
http://bugs.digium.com/view.php?id=3  0x0035b88f in skinny_session
(data=0x870e600) at chan_skinny.c:5585
http://bugs.digium.com/view.php?id=4  0x08122445 in dummy_start (data=0x86d1a88)
at utils.c:870
http://bugs.digium.com/view.php?id=5  0x005793cc in start_thread () from
/lib/tls/libpthread.so.0
http://bugs.digium.com/view.php?id=6  0x004d21ae in clone () from
/lib/tls/libc.so.6
(gdb) print x
$1 = (struct match_char *) 0x0

I wondered if this was perhaps because I had no [skinnyregistrations]
section in extensions.conf, but I added one and it made no difference.

====================================================================== 

---------------------------------------------------------------------- 
 mvanbaak - 04-01-08 13:44  
---------------------------------------------------------------------- 
I cannot reproduce this on my trunk setup, and the changes between trunk
and 1.6 are none in this area.

My skinny.conf:

[general]
bindaddr=0.0.0.0
bindport=2000
dateformat=D-M-Y
keepalive=120
vmexten=1233
regcontext = skinnyregistrations

[office]
device = SEP0015626A4B99
nat=yes
callerid="VanBaak" <6000>
mailbox=13
context = internal
regexten = 6000
callwaiting=yes
transfer=yes
threewaycalling=yes
linelabel=VanBaak
setvar=name=vanbaak
line => 6000
callerid="3d" <6001>
context=internal
regexten=6001
linelabel=3d
setvar=name=3d
line => 6001
speeddial => 6002 at hints,Livingroom

[livingroom]
device = SEP0012D9166A2C
nat=yes
callerid="Livingroom" <6002>
mailbox=13
callwaiting=yes
transfer=yes
threewaycalling=yes
context=internal
regexten=6002
linelabel=Livingroom
line => 6002 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
04-01-08 13:44  mvanbaak       Note Added: 0084878                          
======================================================================