Bug#671382: t38modem: SEGFAULT in MyH323Connection::AdjustMediaFormats

Thu May 3 16:56:26 UTC 2012

Package: t38modem
Version: 2.0.0-2
Severity: grave

Hi,

On my up-to-date wheezy (testing) system, t38modem crashes with segfault at each try to send or receive a fax.

Current command line used is

  /usr/bin/t38modem -t -o /var/log/t38modem.log -n -T -p +/dev/ttyx0,+/dev/ttyx1 --route "modem:0.*=h323:<dn>@172.16.9.23" --route "h323:.*=modem:<dn>"

I've installed libpt-dbg and libopal-dbg and rebuilt t38modem with debug symbols, so I can provide with the following stack trace.

Starting program: /usr/bin/t38modem -t -o /var/log/t38modem.log -n -T -p +/dev/ttyx0,+/dev/ttyx1 --route modem:0.\*=h323:\<dn\>@172.16.9.23 --route h323:.\*=modem:\<dn\>a
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffed21e700 (LWP 17042)]
T38Modem Version 2.0.0
 (OPAL-3.10.4/3.10.4 (svn:26616), PTLIB-2.10.4/2.10.4 (svn:26606)) by Vyacheslav Frolov on Unix Linux (3.2.0-2-amd64-x86_64)

[New Thread 0x7ffff7ee4700 (LWP 17043)]
[New Thread 0x7ffff7ea3700 (LWP 17044)]
[New Thread 0x7ffff7e62700 (LWP 17045)]
[New Thread 0x7fffe2191700 (LWP 17046)]
[New Thread 0x7fffe2150700 (LWP 17047)]
[New Thread 0x7fffe210f700 (LWP 17048)]
[New Thread 0x7fffe20ce700 (LWP 17049)]
[New Thread 0x7fffe208d700 (LWP 17050)]
[New Thread 0x7fffe204c700 (LWP 17051)]
[New Thread 0x7fffe200b700 (LWP 17052)]
[New Thread 0x7fffe1fca700 (LWP 17053)]
[New Thread 0x7fffe1f89700 (LWP 17054)]
Waiting for incoming H.323 calls from tcp$*:1720,tcps$*:1300
[New Thread 0x7fffe1f48700 (LWP 17055)]
[New Thread 0x7fffe1f07700 (LWP 17056)]
[New Thread 0x7fffe1ec6700 (LWP 17057)]
[New Thread 0x7fffe1e85700 (LWP 17058)]
[New Thread 0x7fffe1e44700 (LWP 17059)]
Waiting for incoming SIP calls from udp$*:5060,tcp$*:5060,tcps$*:5061
Route table:
  modem:0.*=h323:<dn>@172.16.9.23
  h323:.*=modem:<dn>a
[Thread 0x7fffe200b700 (LWP 17052) exited]
[Thread 0x7fffe1fca700 (LWP 17053) exited]
[Thread 0x7fffe204c700 (LWP 17051) exited]
[New Thread 0x7fffe204c700 (LWP 17152)]
[New Thread 0x7fffe1fca700 (LWP 17153)]
[New Thread 0x7fffe200b700 (LWP 17154)]
[Thread 0x7fffe1fca700 (LWP 17153) exited
[Thread 0x7fffe200b700 (LWP 17154) exited]
[Thread 0x7fffe204c700 (LWP 17152) exited]
[New Thread 0x7fffe204c700 (LWP 17155)]
[New Thread 0x7fffe200b700 (LWP 17156)]
[New Thread 0x7fffe1fca700 (LWP 17157)]
Call[Cc0d937f91] from modem:T38Modem%20v2.0.0 to 00646738610 at +/dev/ttyx1, route to h323:00646738610 at tcp$172.16.9.23:1720
[New Thread 0x7fffe1e03700 (LWP 17158)]
[New Thread 0x7fffe1dc2700 (LWP 17159)]
Open OpalRTPMediaStream-Source-G.711-uLaw-64k for Call[Cc0d937f91]
Open AudioModemMediaStream-Sink-PCM-16 for Call[Cc0d937f91]
[New Thread 0x7fffe1d81700 (LWP 17160)]
[Thread 0x7fffe20ce700 (LWP 17049) exited]
[Thread 0x7fffe208d700 (LWP 17050) exited]
[Thread 0x7fffe210f700 (LWP 17048) exited]
[New Thread 0x7fffe210f700 (LWP 17162)]
[New Thread 0x7fffe208d700 (LWP 17163)]
[New Thread 0x7fffe20ce700 (LWP 17164)]
Open AudioModemMediaStream-Source-PCM-16 for Call[Cc0d937f91]
Open OpalRTPMediaStream-Sink-G.711-uLaw-64k for Call[Cc0d937f91]
[New Thread 0x7fffe1d40700 (LWP 17223)]
[New Thread 0x7fffe1cff700 (LWP 17259)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffe1cff700 (LWP 17259)]
0x00000000004749ed in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
(gdb) bt
#0  0x00000000004749ed in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#2  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#3  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#4  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#5  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#6  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#7  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#8  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#9  0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#10 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()

[ 1590 identical lines omitted]

#1600 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1601 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1602 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1603 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1604 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1605 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1606 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1607 0x0000000000474aac in MyH323Connection::AdjustMediaFormats(bool, OpalConnection*, OpalMediaFormatList&) const ()
#1608 0x00000000004740bb in MyH323Connection::SwitchFaxMediaStreams(bool) ()
#1609 0x000000000046ab87 in ModemConnection::RequestMode(PThread&, long) ()
#1610 0x000000000046f441 in ModemConnection::RequestMode_PNotifier::Call(PObject&, long) const ()
#1611 0x000000000043d209 in PNotifierTemplate<long>::operator()(PObject&, long) const ()
#1612 0x00007ffff6915ed3 in PThread::PX_ThreadStart(void*) () from /usr/lib/libpt.so.2.10.4
#1613 0x00007ffff56d3b50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#1614 0x00007ffff59c190d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#1615 0x0000000000000000 in ?? ()

Regards,

L

--
Luigi Gangitano -- <luigi at debian.org> -- <gangitano at lugroma3.org>
GPG: 1024D/924C0C26: 12F8 9C03 89D3 DB4A 9972  C24A F19B A618 924C 0C26
GPG: 4096R/2BA97CED: 8D48 5A35 FF1E 6EB7 90E5  0F6D 0284 F20C 2BA9 7CED

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