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### Description
I tried to update to a new version of kamailio and it didn't start with the old
configuration file, I found out that the regex module is responsible.
Log after start:
` 0(713737) INFO: regex [regex_mod.c:417]: load_pcres(): num groups = 1
0(713737) INFO: regex [regex_mod.c:419]: load_pcres():
<group[0]>((^[1-9]\d{5}$)|(^ukrb[12]$)) </group[0]> (size = 29)
0(713735) ERROR: <core> [core/daemonize.c:302]: daemonize(): Main process
exited before writing to pipe`
<!--
Explain what you did, what you expected to happen, and what actually happened.
-->
### Troubleshooting
#### Reproduction
<!--
If the issue can be reproduced, describe how it can be done.
-->
grep regex /usr/local/etc/kamailio/kamailio.cfg
loadmodule "regex.so"
modparam("regex", "file", "/usr/local/etc/kamailio/regex_groups")
cat /usr/local/etc/kamailio/regex_groups
[0]
#cislo linky
(^[1-9]\d{5}$)
(^ukrb[12]$)
#### Debugging Data
<!--
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gdb /path/to/kamailio /path/to/corefile
bt full
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```
gdb /usr/local/sbin/kamailio /core
GNU gdb (Debian 10.1-1.7) 10.1.90.20210103-git
Copyright (C) 2021 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-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/local/sbin/kamailio...
warning: Can't open file /dev/zero (deleted) during file-backed mapping note
processing
[New LWP 713740]
warning: Section `.reg-xstate/713740' in core file too small.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/local/sbin/kamailio -S -P
/run/kamailio/kamailio.pid -f /usr/local/etc/kam'.
Program terminated with signal SIGSEGV, Segmentation fault.
warning: Section `.reg-xstate/713740' in core file too small.
#0 load_pcres (action=0) at regex_mod.c:466
466 *pcres = *pcres_tmp;
(gdb) bt full
#0 load_pcres (action=0) at regex_mod.c:466
i = 1
j = 32
f = 0x55c5775ea6b0
line = '\000' <repeats 499 times>
patterns = 0x7f7e7ad3a230
pcre_error_num = 100
pcre_error = '\000' <repeats 16 times>,
"\277Fou\305U\000\000\000\000\000\000m\000\000\000(Hou\305U\000\000\332Gou\305U\000\000\220\000\000\000\000\000\000\000\020\240\303z~\177\000\000
\274$u\305U\000\000\037\000\000\000\004\000\000\000\001\000\000\000%\000\000\000\n\344\n\000\000\000\000\000
\274$u\305U\000\000\000\000\000\000\000\000\000\000\n\344\n\000\000\000\000\000\360\212\355\255\374\177\000"
pcre_erroffset = 0
num_pcres_tmp = 1
pcres_tmp = 0x7f7e7ad62c00
llen = 19
__func__ = "load_pcres"
#1 0x00007f7e79f62c92 in mod_init () at regex_mod.c:245
__func__ = "mod_init"
#2 0x000055c5754a99f7 in init_mod (m=0x7f7e7adeb1f0) at core/sr_module.c:1036
ret = -2097389668
__func__ = "init_mod"
#3 0x000055c5754a9687 in init_mod (m=0x7f7e7adeb6c0) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#4 0x000055c5754a9687 in init_mod (m=0x7f7e7adebda0) at core/sr_module.c:1031
ret = -2097386271
__func__ = "init_mod"
#5 0x000055c5754a9687 in init_mod (m=0x7f7e7adec3b0) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#6 0x000055c5754a9687 in init_mod (m=0x7f7e7adec910) at core/sr_module.c:1031
ret = -1376937648
__func__ = "init_mod"
#7 0x000055c5754a9687 in init_mod (m=0x7f7e7adece70) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#8 0x000055c5754a9687 in init_mod (m=0x7f7e7aded520) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#9 0x000055c5754a9687 in init_mod (m=0x7f7e7adedc10) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#10 0x000055c5754a9687 in init_mod (m=0x7f7e7adee1f0) at core/sr_module.c:1031
ret = -1376937902
__func__ = "init_mod"
#11 0x000055c5754a9687 in init_mod (m=0x7f7e7adeeaf0) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#12 0x000055c5754a9687 in init_mod (m=0x7f7e7adef4d0) at core/sr_module.c:1031
ret = 16
__func__ = "init_mod"
#13 0x000055c5754a9687 in init_mod (m=0x7f7e7adef8e0) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#14 0x000055c5754a9687 in init_mod (m=0x7f7e7adefdd0) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#15 0x000055c5754a9687 in init_mod (m=0x7f7e7adf3320) at core/sr_module.c:1031
ret = 2053729903
__func__ = "init_mod"
#16 0x000055c5754a9687 in init_mod (m=0x7f7e7adf3770) at core/sr_module.c:1031
ret = -1
__func__ = "init_mod"
#17 0x000055c5754a9687 in init_mod (m=0x7f7e7adf3ba0) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#18 0x000055c5754a9687 in init_mod (m=0x7f7e7adf4140) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#19 0x000055c5754a9687 in init_mod (m=0x7f7e7adf4550) at core/sr_module.c:1031
ret = 0
__func__ = "init_mod"
#20 0x000055c5754a9687 in init_mod (m=0x7f7e7adf6140) at core/sr_module.c:1031
ret = 713738
__func__ = "init_mod"
#21 0x000055c5754a9dc4 in init_modules () at core/sr_module.c:1067
t = 0xae40a
i = -1
__func__ = "init_modules"
#22 0x000055c57526927c in main (argc=12, argv=0x7ffcaded9fd8) at main.c:3202
cfg_stream = 0x55c57746a2a0
c = -1
r = 0
tmp = 0x7ffcadedae88 ""
tmp_len = 832
port = 5060
proto = 0
aproto = 0
ahost = 0x0
aport = 0
options = 0x55c5756b8368
":f:cm:M:dVIhEeb:B:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:x:X:Y:"
ret = -1
seed = 4165046025
rfd = 4
debug_save = 0
debug_flag = 0
dont_fork_cnt = 0
n_lst = 0x98000000980
p = 0x180000000 <error: Cannot access memory at address 0x180000000>
st = {st_dev = 115, st_ino = 321140, st_nlink = 2, st_mode = 16888,
st_uid = 0, st_gid = 0, __pad0 = 0, st_rdev = 0, st_size = 40, st_blksize =
4096, st_blocks = 0, st_atim = {tv_sec = 1712844094, tv_nsec = 899597355},
st_mtim = {tv_sec = 1712844094, tv_nsec = 899597355}, st_ctim = {tv_sec =
1712844094, tv_nsec = 899597355}, __glibc_reserved = {0, 0, 0}}
--Type <RET> for more, q to quit, c to continue without paging--
l1 = 2048
tbuf =
"p\233\355\255\374\177\000\000\310%ǂ~\177\000\000\020D\373\202~\177\000\000\000\000\000\000\000\000\000\000\360\233\355\255\374\177\000\000\000\000\000\000\000\000\000\000\360\233\355\255\374\177",
'\000' <repeats 18 times>,
"`\307\373\202~\177\000\000\350\204\376\202~\177\000\000\204\311\373\202~\177\000\000\060\304\373\202~\177\000\000Hp\376\202~\177\000\000\000\300\373\202~\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000@\342ł~\177",
'\000' <repeats 66 times>...
option_index = 12
long_options = {{name = 0x55c5756ba886 "help", has_arg = 0, flag = 0x0,
val = 104}, {name = 0x55c5756b554c "version", has_arg = 0, flag = 0x0, val =
118}, {name = 0x55c5756ba88b "alias", has_arg = 1, flag = 0x0, val = 1024},
{name = 0x55c5756ba891 "subst", has_arg = 1, flag = 0x0, val = 1025}, {name =
0x55c5756ba897 "substdef", has_arg = 1, flag = 0x0, val = 1026}, {name =
0x55c5756ba8a0 "substdefs",
has_arg = 1, flag = 0x0, val = 1027}, {name = 0x55c5756ba8aa
"server-id", has_arg = 1, flag = 0x0, val = 1028}, {name = 0x55c5756ba8b4
"loadmodule", has_arg = 1, flag = 0x0, val = 1029}, {name = 0x55c5756ba8bf
"modparam", has_arg = 1, flag = 0x0, val = 1030}, {name = 0x55c5756ba8c8
"log-engine", has_arg = 1, flag = 0x0, val = 1031}, {name = 0x55c5756ba8d3
"debug", has_arg = 1, flag = 0x0, val = 1032}, {
name = 0x55c5756ba8d9 "cfg-print", has_arg = 0, flag = 0x0, val =
1033}, {name = 0x55c5756ba8e3 "atexit", has_arg = 1, flag = 0x0, val = 1034},
{name = 0x55c5756ba8ea "all-errors", has_arg = 0, flag = 0x0, val = 1035},
{name = 0x0, has_arg = 0, flag = 0x0, val = 0}}
__func__ = "main"
```
#### 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).
-->
```
0(713842) WARNING: tls [tls_mod.c:747]: mod_register(): OpenSSL 1.1.1 setting
cryptorand random engine
0(713842) INFO: rtimer [rtimer_mod.c:298]: stm_t_param(): created rtimer
name=iptables interval=60 mode=1
0(713842) INFO: <core> [core/tcp_main.c:5205]: init_tcp(): using epoll_lt as
the io watch method (auto detected)
loading modules under config path: /usr/local/lib64/kamailio/modules/
Listening on
udp: 81.31.45.42 [81.31.45.42]:5060
udp: 81.31.45.42 [81.31.45.42]:6688
udp: 81.31.45.42 [81.31.45.42]:443
udp: 81.31.45.42 [81.31.45.42]:6699
tcp: 81.31.45.42 [81.31.45.42]:5060
tcp: 81.31.45.42 [81.31.45.42]:443
tcp: 81.31.45.42 [81.31.45.42]:6688
tcp: 81.31.45.42 [81.31.45.42]:6699
tls: 81.31.45.42 [81.31.45.42]:5061
tls: 81.31.45.42 [81.31.45.42]:6689
tls: 81.31.45.42 [81.31.45.42]:6670
Aliases:
*: sip2.gope.cz:*
*: sipo.smartel.cz:*
*: sipi.smartel.cz:*
*: siptest.odorik.cz:*
*: *.odorik.cz:*
0(713844) INFO: rr [../outbound/api.h:53]: ob_load_api(): unable to import
bind_ob - maybe module is not loaded
0(713844) INFO: rr [rr_mod.c:185]: mod_init(): outbound module not available
0(713844) INFO: geoip2 [geoip2_mod.c:96]: mod_init(): using GeoIP database
path /var/kamailio/GeoLite2-City-17.06.22.mmdb, library version 1.5.2
0(713844) INFO: cfgutils [cfgutils.c:829]: mod_init(): no hash_file given,
disable hash functionality
0(713844) INFO: regex [regex_mod.c:417]: load_pcres(): num groups = 1
0(713844) INFO: regex [regex_mod.c:419]: load_pcres():
<group[0]>(((^[1-9]\d{5}$))|((^ukrb[12]$)))</group[0]> (size = 33)
0(713842) ERROR: <core> [core/daemonize.c:302]: 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).
-->
```
(paste your sip traffic here)
```
### 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`
```
kamailio -v
version: kamailio 5.8.1 (x86_64/linux) 215af5-dirty
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE,
USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, MEM_JOIN_FREE, 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_BLOCKLIST, HAVE_RESOLV_RES,
TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_SEND_BUFFER_SIZE
262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: 215af5 -dirty
compiled on 15:32:24 Apr 11 2024 with gcc 10.2.1
```
* **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 `lsb_release -a` and `uname -a`)
-->
```
lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 11 (bullseye)
Release: 11
Codename: bullseye
uname -a
Linux serZT 6.1.0-18-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.76-1 (2024-02-01)
x86_64 GNU/Linux
```
--
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