[OpenSIPS-Users] Crashesh with SSL

[Vasil Kolev]

В 17:04 +0200 на 20.02.2009 (пт), Bogdan-Andrei Iancu написа:
> Hi Vasil,
> 
> Vasil Kolev wrote:
> > Hi,
> >
> > I'm using 1.5 (trunk) with some small changes and trying to run it with
> > TLS. I see all kinds of weird crashes related to libssl, which I'm
> > pretty sure are related to a race condition somewhere, which I have hard
> > time finding.
> Can you post some more info on this, like logs, backtrace, anything that 
> might help in locating the problem?


I've been debugging this for a few days, the backtraces are useless,
like this one:

(gdb) bt
#0  0x00000000 in ?? ()
#1  0xb7e495ab in lh_retrieve () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#2  0xb7dde7b2 in ?? () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#3  0xb55b6168 in ?? ()
#4  0xbf96c8e0 in ?? ()
#5  0xb7eb2ed0 in ?? () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#6  0x0000012c in ?? ()
#7  0x00000000 in ?? ()

or like this:

#0  0x00000000 in ?? ()
#1  0xb7e945ab in lh_retrieve () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#2  0xb7e297b2 in ?? () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#3  0xb5601168 in ?? ()
#4  0xbfab6340 in ?? ()
#5  0xb7efded0 in ?? () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#6  0x0000012c in ?? ()
#7  0xb7f768b8 in ?? () from /usr/lib/i686/cmov/libssl.so.0.9.8
#8  0xb7efded0 in ?? () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#9  0x00000001 in ?? ()
#10 0xb7f51767 in ssl3_clear () from /usr/lib/i686/cmov/libssl.so.0.9.8
#11 0xb7e29d5c in ?? () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#12 0xb57d6f28 in ?? ()
#13 0xb57d6f28 in ?? ()
#14 0xbfab6388 in ?? ()
#15 0xb7f58b02 in tls1_clear () from /usr/lib/i686/cmov/libssl.so.0.9.8
#16 0xb7e294c9 in CRYPTO_new_ex_data () from /usr/lib/i686/cmov/libcrypto.so.0.9.8
#17 0xb7f6660c in SSL_new () from /usr/lib/i686/cmov/libssl.so.0.9.8
#18 0x08129d48 in tls_tcpconn_init (c=0xb57c6e10, sock=24) at tls/tls_server.c:610
#19 0x080b4e79 in tcpconn_new (sock=24, su=0xbfab6518, ba=0x819fa40, type=3, state=3) at tcp_main.c:402
#20 0x080b84a0 in handle_new_connect (si=0x819fa40) at tcp_main.c:966
#21 0x080bdbef in tcp_main_loop () at io_wait.h:727
#22 0x0806e38e in main (argc=1, argv=0xbfab67d4) at main.c:847

(here when I looked at tls_tcpconn_init, it looked like something went
really wrong on the stack, as for example 'dom' was 0x52 and stuff like
that, and the line of the crash seemed the wrong one, looking at the
variables and the code flow)


After some time, I have managed to narrow it down to the following: if
the xcap_client module is present and used by presence_xml, crashes
occur, otherwise it works fine.

I'll look into the xcap client, but currently I've started using the
'integrated_xcap_server' option.

-- 
Regards,
Vasil Kolev
Attractel NV
dCAP #1324, LPIC2