28 Mar
2017
28 Mar
'17
2:42 p.m.
hello Daniel
thanks a lot.
we actually will start testing 5.0 to migrate to it, but in the meantime
it's great if we can patch it on the 4.4
best regards
david
El mar, 28-03-2017 a las 13:37 +0200, Daniel-Constantin Mierla escribió:
Hello,
I pushed a safety checks to avoid crash in this situation. I will have
to investigate deeper why it got to this state, but for now the fix
should avoid this crash in a similar situation. You have to use the
latest branch 4.4 or backport the patch
e20b38e0084c1f89c43a921a8a2affbea060aaa5 to your version.
Cheers,
Daniel
On 28/03/2017 12:15, David Escartín Almudévar wrote:
hello Daniel
it happened only once as far as i know, i tried to duplicate by
myself but i couldnt create the sipp scenario
i will try to duplicate it setting the octal parameters in hex
escaped by % in the SIP uris to see if i can, but i didnt have time
yet
in the meantime here you have the information
(gdb) frame 6
#6 0x00000000004696c4 in dns_srv_sip_resolvehost
(name=0x7f6906943188, port=0x7fff120795e2, proto=0x7fff120795e1
"\001\330\023") at dns_cache.c:2679
2679 he=dns_get_he(name, dns_flags);
(gdb) p *name
$1 = {s = 0x0, len = 0}
(gdb) p *port
$2 = 5080
thanks a lot and regards
david
El lun, 27-03-2017 a las 21:04 +0200, Daniel-Constantin Mierla
escribió:
--
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - May 22-24 (USA) - www.asipto.com
Kamailio World Conference - May 8-10, 2017 - www.kamailioworld.com Hello,
did it happen only once, or it can be reproduced?
Can you also get from gdb:
frame 6
p *name
p *port
Cheers,
Daniel
On 27/03/2017 16:43, David Escartín Almudévar wrote:
hello Daniel
here you have
(gdb) frame 1
#1 0x000000000045b472 in _dns_hash_find (name=0x7f6906943188,
type=1, h=0x7fff120793cc, err=0x7fff120793ac) at dns_cache.c:535
535 *h=dns_hash_no(name->s, name->len, type);
(gdb) info locals
e = 0x7f69069015b8
tmp = 0x7f69069247e0
ret = 0x0
now = 689922868
cname_chain = 0
cname = {s = 0xab0e93 "Via: SIP/2.0/UDP \020?\337\v\234\262\264
\016 :5080;received=;rport=5080;branch=\020?\337\v\234\262\264
\016 \r\nContent-Length: 0\r\n\r\n", len = 11210375}
__FUNCTION__ = "_dns_hash_find"
(gdb) list
530 cname_chain=0;
531 ret=0;
532 now=get_ticks_raw();
533 *err=0;
534 again:
535 *h=dns_hash_no(name->s, name->len, type);
536 #ifdef DNS_CACHE_DEBUG
537 LM_DBG("(%.*s(%d), %d), h=%d\n", name->len, name->s,
name->len, type, *h);
538 #endif
539 clist_foreach_safe(&dns_hash[*h], e, tmp, next){
thanks a lot and regards
david
El lun, 27-03-2017 a las 13:54 +0200, Daniel-Constantin Mierla
escribió:
> Hello,
>
> the backtrace is no longer matching the 4.4 branch code, as
> you run an older release in that series.
>
> Can you get with gdb from the core the output of the following
> commands:
>
> frame 1
>
> info locals
>
> list
>
>
> and send them here on the mailing list.
>
> Cheers,
> Daniel
>
> On 24/03/2017 14:50, David Escartín Almudévar wrote:
>
>
> > hello all, Daniel
> >
> > checking the core with the gdb, we have checked the
> > variables at the frames of the backtrace, to try to get the
> > full sip message seems it seemed truncated.
> > checking the buf variable of the frame 11 which theorically
> > contains the sip msg to parse we have the string
> >
> >
> > SIP/2.0 487 Request Terminated\r\nFrom: \"881237046977
> >
\"<sip:881237046977@79.170.68.185;user=phone>;tag=B7jgc8jQ4m5pB\r\nTo:
<sip:5926053324@79.170.68.186:5060>;tag=e0d50be-13c4-58d47cba-a2ed9808-36fa\r\nl\337K\016\213\347:
\344\003\r\nCSeq: 104824272 INVITE\r\nVia: SIP/2.0/UDP
L\263\264\016\020?\337\v\234\262\264\016 ;branch=\327\f\340\r\nVia: SIP/2.0/UDP
\020?\337\v\234\262\264\016 :5080;received=;rport=5080;branch=\020?\337\v\234\262\264\016
\r\nContent-Length: 0\r\n\r\n
> >
> > this is i guess how gdb parses the message, so i guess i
> > cannot introduce this like that in a xml sipp formal, since
> > CRLF is represented as \r\n, so others parts like l\337K\016
> > \213\347: \344\003 i have no idea what they are, because
> > they also seem to be out of the ASCII table ¿?
> > anycase, seems the message is very bad formed, and the
> > kamailio tries to resolve the host of the Via and it gets
> > nothing, so the function get_hash1_case_raw is fed by a nul
> > value and seems that the reason it crashes
> >
> > hope you can retrieve information from that message to find
> > out what kind of message it exactly is and see if it's
> > possible to avoid kamailio's crash in this scenario
> >
> >
> > best regards
> > david
> >
> >
> >
> > El vie, 24-03-2017 a las 12:10 +0100, David Escartín
> > Almudévar escribió:
> >
> > > hello all
> > >
> > > we have experienced a crash and tracing the logs and the
> > > core, seems it was because a sip response from an
> > > endpoint.
> > > a UDP receiver (26248) crashed and the last message we see
> > > on it is a 487 quite bad formed
> > >
> > > Mar 24 01:58:02
> > > mia-proxy-inout-1-stby /usr/local/kamailio/sbin/kamailio[26248]: ERROR: tm
[t_lookup.c:1055]: t_check_msg(): ERROR: reply doesn't have a via, cseq or call-id
header
> > > Mar 24 01:58:17
> > > mia-proxy-inout-1-stby /usr/local/kamailio/sbin/kamailio[26230]: ALERT:
<core> [main.c:739]: handle_sigs(): child process 26248 exited by a signal 11
> > >
> > >
> > > the backtrace of the core
> > > (gdb) backtrace
> > > #0 0x0000000000457ab9 in get_hash1_case_raw (s=0x0,
> > > len=0) at hashes.h:210
> > > #1 0x000000000045b472 in _dns_hash_find
> > > (name=0x7f6906943188, type=1, h=0x7fff120793cc,
> > > err=0x7fff120793ac) at dns_cache.c:535
> > > #2 0x0000000000461285 in dns_hash_get
> > > (name=0x7f6906943188, type=1, h=0x7fff120793cc,
> > > err=0x7fff120793ac) at dns_cache.c:762
> > > #3 0x0000000000467194 in dns_get_entry
> > > (name=0x7f6906943188, type=1) at dns_cache.c:2102
> > > #4 0x0000000000468a05 in dns_a_get_he
> > > (name=0x7f6906943188) at dns_cache.c:2432
> > > #5 0x0000000000468bb9 in dns_get_he (name=0x7f6906943188,
> > > flags=1) at dns_cache.c:2505
> > > #6 0x00000000004696c4 in dns_srv_sip_resolvehost
> > > (name=0x7f6906943188, port=0x7fff120795e2,
> > > proto=0x7fff120795e1 "\001\330\023") at dns_cache.c:2679
> > > #7 0x000000000046aa37 in dns_sip_resolvehost
> > > (name=0x7f6906943188, port=0x7fff120795e2,
> > > proto=0x7fff120795e1 "\001\330\023") at dns_cache.c:2849
> > > #8 0x000000000049519e in update_sock_struct_from_via
> > > (to=0x7fff12079708, msg=0x7f69069a1dd8,
> > > via=0x7f69068f82a8) at forward.c:704
> > > #9 0x0000000000495ee5 in do_forward_reply
> > > (msg=0x7f69069a1dd8, mode=0) at forward.c:766
> > > #10 0x00000000004970af in forward_reply
> > > (msg=0x7f69069a1dd8) at forward.c:849
> > > #11 0x00000000005197ef in receive_msg (
> > > buf=0xab0d80 "SIP/2.0 487 Request Terminated\r\nFrom:
> > > \"8888888888
> > > \"<sip:8888888888@7.7.7.7;user=phone>;tag=B7jgc8jQ4m5pB\r
> > > \nTo:
> > >
<sip:555555555@8.8.8.8:5060>;tag=e0d50be-13c4-58d47cba-a2ed9808-36fa\r\nl\337K\016"...,
len=367, rcv_info=0x7fff12079a10) at receive.c:299
> > > #12 0x0000000000627b43 in udp_rcv_loop () at
> > > udp_server.c:495
> > > #13 0x00000000004b107a in main_loop () at main.c:1600
> > > #14 0x00000000004b842f in main (argc=13,
> > > argv=0x7fff12079fb8) at main.c:2616
> > >
> > >
> > > i have tried to duplicate the issue, but i dont know how
> > > to translate l\337K\016 to a xml notation
> > > i guess this is some weird that cannot be processed for
> > > kamailio
> > >
> > > could you please take a look and let me know if you know
> > > how to duplicate and fix this crash?
> > >
> > > thanks a lot and regards
> > > david
> >
> >
> >
> >
> >
> > _______________________________________________
> > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> > sr-users(a)lists.sip-router.org
> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
> --
> Daniel-Constantin Mierla
> www.twitter.com/miconda -- www.linkedin.com/in/miconda
> Kamailio Advanced Training - Mar 6-8 (Europe) and Mar 20-22 (USA) - www.asipto.com
> Kamailio World Conference - May 8-10, 2017 - www.kamailioworld.com
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users(a)lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
--
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - Mar 6-8 (Europe) and Mar 20-22 (USA) - www.asipto.com
Kamailio World Conference - May 8-10, 2017 - www.kamailioworld.com