[asterisk-bugs] [Asterisk 0013623]: Asterisk segfaults when using SIP session timers

Asterisk Bug Tracker noreply at bugs.digium.com
Tue Oct 7 04:03:18 CDT 2008


A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=13623 
====================================================================== 
Reported By:                Nik Soggia
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   13623
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.1-beta1 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             2008-10-06 05:46 CDT
Last Modified:              2008-10-07 04:03 CDT
====================================================================== 
Summary:                    Asterisk segfaults when using SIP session timers
Description: 
My Asterisk 1.6.0-rc6 shows the same symptoms as in issue 0012919: under
moderate or heavy traffic it keeps crashing randomly about every half an
hour.
Inbound traffic is coming from a single equipment (not under my control)
that always sends "Session-Expires" in the SIP packet. In the additional
information I enclosed a typical incoming packet.

I set "session-timers = refuse" in sip.conf [general] last friday and it
didn't crash anymore in about three days. after a so long time without a
single crash I think that we can say that it fixed the problem.

I collected 23 core dumps in about 10 hours, it is a production machine
that suddendly started crashing and I had no time to recompile and enable
thread debugging as recommended. In the additional information I enclosed
all the backtraces.

The backtraces show that the crash is mostly inside proc_session_timer(),
but in different lines, as if p->stimer disappears just after the initial
consistency check (maybe the channel is closing exactly when the timer
expires?).

Should you need the core dumps (about 130 Mb), I can send them to you
privately, they contain lots of confidential data and I can't make them
public.
======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0012919 Segmentation fault in "Session tim...
====================================================================== 

---------------------------------------------------------------------- 
 (0093272) Nik Soggia (reporter) - 2008-10-07 04:03
 http://bugs.digium.com/view.php?id=13623#c93272 
---------------------------------------------------------------------- 
# here is how I generated the files
echo -e >bt.txt 'set pagination off\nthread apply all bt\nquit'
echo -e >btf.txt 'set pagination off\nbt full\nquit'
for i in core.??; do
	echo 1>&2 "processing ${i}..."
	gdb >"${i}.txt" -batch -q -n -e /usr/sbin/asterisk -c "${i}" -x bt.txt
	printf '\n%80s\n\n' | tr ' ' '#' >>"${i}.txt"
	gdb >>"${i}.txt" -batch -q -n -e /usr/sbin/asterisk -c "${i}" -x btf.txt
done
rm -f bt.txt btf.txt

cp "${0}" "${0}.txt"
for i in core.??.txt "${0}.txt"; do
	sed -i \
		-e 's/(omissis)/(omissis)/gi' \
		-e 's/(omissis)/(omissis)/gi' \
		-e 's/(omissis)/(omissis)/gi' \
	"${i}"
done 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2008-10-07 04:03 Nik Soggia     Note Added: 0093272                          
======================================================================




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