13 Oct
2017
13 Oct
'17
3:14 a.m.
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### Description
Kamailio is segfaulting after activating pubruri_caller_dlg_var and pubruri_callee_dlg_var
from pua_dialoginfo.
modparam("pua_dialoginfo", "use_pubruri_avps", 1)
//modparam("pua_dialoginfo", "pubruri_caller_avp",
"$avp(s:pubruris_caller)")
//modparam("pua_dialoginfo", "pubruri_callee_avp",
"$avp(s:pubruris_callee)")
modparam("pua_dialoginfo", "pubruri_caller_dlg_var",
"pubruri_caller")
modparam("pua_dialoginfo", "pubruri_callee_dlg_var",
"pubruri_callee")
When i comment the corresponding lines and switch back to the regular avps Kamailio runs
without problems.
### Troubleshooting
#### Reproduction
In my setup it seems to be sufficient to just set the module parameters to provoke the
segfault.
I dont have to wait for any SIP-Traffic or accessing the dlg_vars. Kamailio segfaults
while starting.
#### Debugging Data
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If you got a core dump, use gdb to extract troubleshooting data - full backtrace,
local variables and the list of the code at the issue location.
gdb /path/to/kamailio /path/to/corefile
bt full
info locals
list
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```
[root@kamroute ~]# gdb /usr/sbin/kamailio /core.6547
GNU gdb (GDB) Red Hat Enterprise Linux 7.6.1-100.el7
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/sbin/kamailio...Reading symbols from
/usr/lib/debug/usr/sbin/kamailio.debug...done.
done.
[New LWP 6547]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/sbin/kamailio -P /var/run/kamailio/kamailio.pid -f
/etc/kamailio/kamailio_'.
Program terminated with signal 11, Segmentation fault.
#0 __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:31
31 movdqu (%rdi), %xmm1
(gdb) bt full
#0 __strlen_sse2 () at ../sysdeps/x86_64/strlen.S:31
No locals.
#1 0x00007fc7c61786c4 in mod_init () at pua_dialoginfo.c:692
bind_pua = 0x7fc7c6396b88 <bind_pua>
s = {s = 0x0, len = -969002120}
avp_spec = {type = 397561584, getf = 0x7fc7ce3b8827 <__fprintf+135>, setf =
0x3, pvp = {pvn = {type = 48, nfree = 0x7ffd17b24e80, u = {isname = {type = 397561264,
name = {n = 7976200, s = {s = 0x79b508 "DEBUG",
len = 397562576}, re = 0x79b508}}, dname = 0x7ffd17b24db0}}, pvi =
{type = 0, u = {ival = 6547, dval = 0x1993}}}, trans = 0x79b508}
__FUNCTION__ = "mod_init"
#2 0x00000000005661e2 in init_mod (m=0x7fc7cdbd3ac0) at core/sr_module.c:966
__FUNCTION__ = "init_mod"
#3 0x0000000000565f1e in init_mod (m=0x7fc7cdbd3e50) at core/sr_module.c:963
__FUNCTION__ = "init_mod"
#4 0x0000000000566519 in init_modules () at core/sr_module.c:995
t = 0x20000003e4
i = 994
__FUNCTION__ = "init_modules"
#5 0x00000000004293e1 in main (argc=13, argv=0x7ffd17b252d8) at main.c:2584
cfg_stream = 0x254c010
c = -1
r = 397562176
tmp = 0x7ffd17b256e0 ""
tmp_len = 0
port = 0
proto = 0
options = 0x737a20
":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:x:X:Y:"
ret = -1
seed = 286186509
rfd = 4
debug_save = 0
debug_flag = 0
dont_fork_cnt = 0
n_lst = 0x0
p = 0x0
st = {st_dev = 18, st_ino = 37027, st_nlink = 2, st_mode = 16832, st_uid = 996,
st_gid = 2, __pad0 = 0, st_rdev = 0, st_size = 60, st_blksize = 4096, st_blocks = 0,
st_atim = {tv_sec = 1507876455, tv_nsec = 469604021},
st_mtim = {tv_sec = 1507878072, tv_nsec = 553083864}, st_ctim = {tv_sec =
1507878072, tv_nsec = 553083864}, __unused = {0, 0, 0}}
__FUNCTION__ = "main"
(gdb) info locals
cfg_stream = 0x254c010
c = -1
r = 397562176
tmp = 0x7ffd17b256e0 ""
tmp_len = 0
port = 0
proto = 0
options = 0x737a20
":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:x:X:Y:"
ret = -1
seed = 286186509
rfd = 4
debug_save = 0
debug_flag = 0
dont_fork_cnt = 0
n_lst = 0x0
p = 0x0
st = {st_dev = 18, st_ino = 37027, st_nlink = 2, st_mode = 16832, st_uid = 996, st_gid =
2, __pad0 = 0, st_rdev = 0, st_size = 60, st_blksize = 4096, st_blocks = 0, st_atim =
{tv_sec = 1507876455, tv_nsec = 469604021}, st_mtim = {
tv_sec = 1507878072, tv_nsec = 553083864}, st_ctim = {tv_sec = 1507878072, tv_nsec =
553083864}, __unused = {0, 0, 0}}
__FUNCTION__ = "main"
(gdb) list
26 mov %edi, %ecx
27 and $0x3f, %ecx
28 pxor %xmm0, %xmm0
29 cmp $0x30, %ecx
30 ja L(next)
31 movdqu (%rdi), %xmm1
32 pcmpeqb %xmm1, %xmm0
33 pmovmskb %xmm0, %edx
34 test %edx, %edx
35 jnz L(exit_less16)
(gdb)
```
#### Log Messages
<!--
Check the syslog file and if there are relevant log messages printed by Kamailio, add them
next, or attach to issue, or provide a link to download them (e.g., to a pastebin site).
-->
Nothing which seems to be interesting. Kamailios last words are:
```
0(7450) DEBUG: <core> [core/sr_module.c:965]: init_mod(): pua_dialoginfo
0(7450) DEBUG: <core> [core/sr_module.c:694]: find_mod_export_record():
find_export_record: found <bind_pua> in module pua
[/usr/lib64/kamailio/modules/pua.so]
0(7450) DEBUG: <core> [core/sr_module.c:694]: find_mod_export_record():
find_export_record: found <load_dlg> in module dialog
[/usr/lib64/kamailio/modules/dialog.so]
0(7448) ERROR: <core> [core/daemonize.c:303]: daemonize(): Main process exited
before writing to pipe
```
#### SIP Traffic
<!--
If the issue is exposed by processing specific SIP messages, grab them with ngrep or save
in a pcap file, then add them next, or attach to issue, or provide a link to download them
(e.g., to a pastebin site).
-->
```
no SIP Traffic needed
```
### Possible Solutions
<!--
If you found a solution or workaround for the issue, describe it. Ideally, provide a pull
request with a fix.
-->
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
```
[root@kamroute ~]# kamailio -v
version: kamailio 5.0.3 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST,
DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC,
DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER,
USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024,
BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled on 12:31:32 Sep 20 2017 with gcc 4.8.2
[root@kamroute ~]# rpm -qa|grep kamail
kamailio-presence-5.0.3-10.el7.x86_64
kamailio-outbound-5.0.3-10.el7.x86_64
kamailio-debuginfo-5.0.3-10.el7.x86_64
kamailio-5.0.3-10.el7.x86_64
kamailio-ims-5.0.3-10.el7.x86_64
kamailio-xmpp-5.0.3-10.el7.x86_64
kamailio-mysql-5.0.3-10.el7.x86_64
[root@kamroute ~]#
```
* **Operating System**:
<!--
Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04,
CentOS 7.1, ...), MacOS, xBSD, Solaris, ...;
Kernel details (output of `uname -a`)
-->
Up2date RHEL7.
```
[root@kamroute ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.4 (Maipo)
[root@kamroute ~]# uname -a
Linux kamroute.intranet.mydomain.de 3.10.0-514.26.1.el7.x86_64 #1 SMP Tue Jun 20 01:16:02
EDT 2017 x86_64 x86_64 x86_64 GNU/Linux
[root@kamroute ~]#
```
If you need any further information just let me know!
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