25 Jul
2023
25 Jul
'23
5:08 p.m.
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### Description
<!--
Explain what you did, what you expected to happen, and what actually happened.
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Hello. I use uac_req_send to send registration to the asterisk pool. If some asterisk did
not authorize and re-sent the 401 code, the module causes a kamailio crash
### Troubleshooting
ds_select("BACKENDS","0");
while(ds_set_dst()) {
xlog("L_DBG",">>> BACKEND du=$du\n");
$uac_req(ruri)="sip:" + $(du{uri.host});
$uac_req(furi)="sip:" + $avp(username) + "@" +
$(du{uri.host});
$uac_req(turi)=$uac_req(furi);
uac_req_send();
ds_next_dst();
}
#### Reproduction
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If the issue can be reproduced, describe how it can be done.
-->
#### 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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```
[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/sbin/kamailio -P /run/kamailio/kamailio.pid -f
/etc/kamailio/kamailio.cfg'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00005557272803b9 in timer_list_expire (t=1180105352, h=0x7f73b30a3bb8,
slow_l=0x7f73b30a73a0, slow_mark=2907) at core/timer.c:846
846 core/timer.c: No such file or directory.
(gdb) bt full
#0 0x00005557272803b9 in timer_list_expire (t=1180105352, h=0x7f73b30a3bb8,
slow_l=0x7f73b30a73a0, slow_mark=2907) at core/timer.c:846
tl = 0x7f73b3a49a88
ret = 0
#1 0x00005557272809cf in timer_handler () at core/timer.c:922
saved_ticks = 1180105352
run_slow_timer = 0
i = 859
__func__ = "timer_handler"
#2 0x0000555727280f53 in timer_main () at core/timer.c:961
No locals.
#3 0x0000555726f77736 in main_loop () at
/build/kamailio-5.6.4+ubuntu22.04/src/main.c:1831
i = 6
pid = 0
si = 0x0
si_desc = "udp receiver child=5
sock=10.153.5.40:5060\000\000\020\000\000\000\003\000\000\000!\000\000\000\000\262\270\224RE&\035(\247K'WU\000\000WqA'WU\000\000\000\000\000\000\000\000\000\000c\367@'WU\000\000!\000\000\000\000\000\000\000\260\325\022\371s\177\000\000
\236.\220\375\177\000\000ݕ\024'WU\000"
nrprocs = 6
woneinit = 1
__func__ = "main_loop"
#4 0x0000555726f83d11 in main (argc=12, argv=0x7ffd902ea398) at
/build/kamailio-5.6.4+ubuntu22.04/src/main.c:3078
cfg_stream = 0x555727e12380
c = -1
r = 0
tmp = 0x7ffd902ebe36 ""
tmp_len = 0
port = 0
proto = 0
ahost = 0x0
aport = 0
options = 0x55572744e898
":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 = 4270110361
rfd = 4
debug_save = 0
debug_flag = 0
dont_fork_cnt = 0
n_lst = 0x7ffd902ea398
p = 0x7ffd902ea310 ""
st = {st_dev = 25, st_ino = 5514, 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 = 1690276408, tv_nsec = 971865637}, st_mtim = {tv_sec = 1690276408,
tv_nsec = 971865637}, st_ctim = {tv_sec = 1690276408, tv_nsec = 971865637},
__glibc_reserved = {0, 0, 0}}
tbuf = '\000' <repeats 80 times>,
"\377\000\000\000\377\000\000\000\000\377\000\000\000\000\000\000", '/'
<repeats 16 times>, "\230\r", '\000' <repeats 14 times>,
"`", '\000' <repeats 15 times>, "\001", '\000'
<repeats 144 times>...
option_index = 12
long_options = {{name = 0x55572740a2e9 "help", has_arg = 0, flag = 0x0,
val = 104}, {name = 0x55572740b84a "version", has_arg = 0, flag = 0x0, val =
118}, {name = 0x55572740f6e4 "alias", has_arg = 1, flag = 0x0, val = 1024},
{name = 0x55572740a2ee "subst",
has_arg = 1, flag = 0x0, val = 1025}, {name = 0x55572740a2f4
"substdef", has_arg = 1, flag = 0x0, val = 1026}, {name = 0x55572740a2fd
"substdefs", has_arg = 1, flag = 0x0, val = 1027}, {name = 0x55572740a307
"server-id", has_arg = 1, flag = 0x0, val = 1028},
{name = 0x55572740a311 "loadmodule", has_arg = 1, flag = 0x0, val =
1029}, {name = 0x55572740a31c "modparam", has_arg = 1, flag = 0x0, val = 1030},
{name = 0x55572740a325 "log-engine", has_arg = 1, flag = 0x0, val = 1031}, {name
= 0x55572740b967 "debug",
has_arg = 1, flag = 0x0, val = 1032}, {name = 0x55572740a330
"cfg-print", has_arg = 0, flag = 0x0, val = 1033}, {name = 0x55572740a33a
"atexit", has_arg = 1, flag = 0x0, val = 1034}, {name = 0x0, has_arg = 0, flag =
0x0, val = 0}}
__func__ = "main"
(gdb) info locals
tl = 0x7f73b3a49a88
ret = 0
(gdb) list
841 in core/timer.c
(gdb)
```
```
[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/sbin/kamailio -P /run/kamailio/kamailio.pid -f
/etc/kamailio/kamailio.cfg'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00007f73f575d4d0 in free_hash_table () at
/build/kamailio-5.6.4+ubuntu22.04/src/modules/tm/h_table.c:464
464 /build/kamailio-5.6.4+ubuntu22.04/src/modules/tm/h_table.c: No such file or
directory.
(gdb) bt full
#0 0x00007f73f575d4d0 in free_hash_table () at
/build/kamailio-5.6.4+ubuntu22.04/src/modules/tm/h_table.c:464
p_cell = 0x0
tmp_cell = 0x0
i = 64459
__func__ = "free_hash_table"
#1 0x00007f73f5793e46 in tm_shutdown () at
/build/kamailio-5.6.4+ubuntu22.04/src/modules/tm/t_funcs.c:88
__func__ = "tm_shutdown"
#2 0x00005557271db17b in destroy_modules () at core/sr_module.c:842
t = 0x7f73f68a65a0
foo = 0x7f73f68a59e0
__func__ = "destroy_modules"
#3 0x0000555726f64029 in cleanup (show_status=1) at
/build/kamailio-5.6.4+ubuntu22.04/src/main.c:561
memlog = 0
__func__ = "cleanup"
#4 0x0000555726f66044 in shutdown_children (sig=15, show_status=1) at
/build/kamailio-5.6.4+ubuntu22.04/src/main.c:704
__func__ = "shutdown_children"
#5 0x0000555726f697dc in handle_sigs () at
/build/kamailio-5.6.4+ubuntu22.04/src/main.c:802
chld = 0
chld_status = 139
any_chld_stopped = 1
memlog = 0
__func__ = "handle_sigs"
#6 0x0000555726f78f42 in main_loop () at
/build/kamailio-5.6.4+ubuntu22.04/src/main.c:1900
i = 6
pid = 37846
si = 0x0
si_desc = "udp receiver child=5
sock=10.153.5.40:5060\000\000\020\000\000\000\003\000\000\000!\000\000\000\000\262\270\224RE&\035(\247K'WU\000\000WqA'WU\000\000\000\000\000\000\000\000\000\000c\367@'WU\000\000!\000\000\000\000\000\000\000\260\325\022\371s\177\000\000
\236.\220\375\177\000\000ݕ\024'WU\000"
nrprocs = 6
woneinit = 1
__func__ = "main_loop"
#7 0x0000555726f83d11 in main (argc=12, argv=0x7ffd902ea398) at
/build/kamailio-5.6.4+ubuntu22.04/src/main.c:3078
cfg_stream = 0x555727e12380
c = -1
r = 0
tmp = 0x7ffd902ebe36 ""
tmp_len = 0
port = 0
proto = 0
ahost = 0x0
aport = 0
options = 0x55572744e898
":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 = 4270110361
rfd = 4
debug_save = 0
debug_flag = 0
dont_fork_cnt = 0
n_lst = 0x7ffd902ea398
p = 0x7ffd902ea310 ""
st = {st_dev = 25, st_ino = 5514, 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 = 1690276408, tv_nsec = 971865637}, st_mtim = {tv_sec = 1690276408,
tv_nsec = 971865637}, st_ctim = {tv_sec = 1690276408, tv_nsec = 971865637},
__glibc_reserved = {0, 0, 0}}
tbuf = '\000' <repeats 80 times>,
"\377\000\000\000\377\000\000\000\000\377\000\000\000\000\000\000", '/'
<repeats 16 times>, "\230\r", '\000' <repeats 14 times>,
"`", '\000' <repeats 15 times>, "\001", '\000'
<repeats 144 times>...
option_index = 12
long_options = {{name = 0x55572740a2e9 "help", has_arg = 0, flag = 0x0,
val = 104}, {name = 0x55572740b84a "version", has_arg = 0, flag = 0x0, val =
118}, {name = 0x55572740f6e4 "alias", has_arg = 1, flag = 0x0, val = 1024},
{name = 0x55572740a2ee "subst",
has_arg = 1, flag = 0x0, val = 1025}, {name = 0x55572740a2f4
"substdef", has_arg = 1, flag = 0x0, val = 1026}, {name = 0x55572740a2fd
"substdefs", has_arg = 1, flag = 0x0, val = 1027}, {name = 0x55572740a307
"server-id", has_arg = 1, flag = 0x0, val = 1028},
{name = 0x55572740a311 "loadmodule", has_arg = 1, flag = 0x0, val =
1029}, {name = 0x55572740a31c "modparam", has_arg = 1, flag = 0x0, val = 1030},
{name = 0x55572740a325 "log-engine", has_arg = 1, flag = 0x0, val = 1031}, {name
= 0x55572740b967 "debug",
has_arg = 1, flag = 0x0, val = 1032}, {name = 0x55572740a330
"cfg-print", has_arg = 0, flag = 0x0, val = 1033}, {name = 0x55572740a33a
"atexit", has_arg = 1, flag = 0x0, val = 1034}, {name = 0x0, has_arg = 0, flag =
0x0, val = 0}}
__func__ = "main"
(gdb) info locals
p_cell = 0x0
tmp_cell = 0x0
i = 64459
__func__ = "free_hash_table"
(gdb) list
459 in /build/kamailio-5.6.4+ubuntu22.04/src/modules/tm/h_table.c
```
#### 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).
-->
```
CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed
pointer (0x7f8a6c440050), called from uac: uac_send.c: uac_send_tm_callback(860), first
free uac: uac_send.c: uac_send_info_clone(110) - ignoring
CRITICAL: <core> [core/mem/q_malloc.c:123]: qm_debug_check_frag(): BUG: qm: fragm.
0x7f74379f46b0 (address 0x7f74379f46e8) beginning overwritten (0)! Memory allocator was
called from uac: uac_send.c:860. Fragment marked by (null):0. Exec from
core/mem/q_malloc.c:511.
```
#### 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).
-->
```
proto:UDP 2023-07-25T10:00:44.452898Z 10.153.5.40:5060 ---> 192.168.50.107:5060
REGISTER sip:192.168.50.107 SIP/2.0
Via: SIP/2.0/UDP 10.153.5.40;branch=z9hG4bK6a0b.834627a6000000000000000000000000.0
To: <sip:3408@192.168.50.107>
From: <sip:3408@192.168.50.107>;tag=b2f228866a24b161d346cfb256d45132-a0527658
CSeq: 10 REGISTER
Call-ID: 2332840947916a3e-39417(a)10.153.5.40
Max-Forwards: 70
Content-Length: 0
Contact: <sip:3408@10.153.5.40:5060>
Expires: 150
User-Agent: PortSIP UC Client Android - v11.8.1
proto:UDP 2023-07-25T10:00:44.464436Z 192.168.50.107:5060 ---> 10.153.5.40:5060
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP
10.153.5.40;rport=5060;received=10.153.5.40;branch=z9hG4bK6a0b.834627a6000000000000000000000000.0
Call-ID: 2332840947916a3e-39417(a)10.153.5.40
From: <sip:3408@192.168.50.107>;tag=b2f228866a24b161d346cfb256d45132-a0527658
To: <sip:3408@192.168.50.107>;tag=z9hG4bK6a0b.834627a6000000000000000000000000.0
CSeq: 10 REGISTER
WWW-Authenticate: Digest
realm="vpp",nonce="1690279244/67fc12dbaf6a76fa34181a4bd504de00",opaque="1680d45809efac86",algorithm=md5,qop="auth"
Server: Asterisk
Content-Length: 0
proto:UDP 2023-07-25T10:00:44.466447Z 10.153.5.40:5060 ---> 192.168.50.107:5060
REGISTER sip:192.168.50.107 SIP/2.0
Via: SIP/2.0/UDP 10.153.5.40;branch=z9hG4bK7a0b.5673b4d4000000000000000000000000.0
To: <sip:3408@192.168.50.107>
From: <sip:3408@192.168.50.107>;tag=b2f228866a24b161d346cfb256d45132-a0527658
CSeq: 11 REGISTER
Call-ID: 2332840947916a3e-39417(a)10.153.5.40
Max-Forwards: 70
Content-Length: 0
Contact: <sip:3408@10.153.5.40:5060>
Expires: 150
Authorization: Digest username="3408", realm="vpp",
nonce="1690279244/67fc12dbaf6a76fa34181a4bd504de00",
uri="sip:192.168.50.107", opaque="1680d45809efac86", qop=auth,
nc=00000001, cnonce="1935694403",
response="38bc75e831e1267ce943bcc50f76390a", algorithm=MD5
User-Agent: PortSIP UC Client Android - v11.8.1
proto:UDP 2023-07-25T10:00:44.477675Z 192.168.50.107:5060 ---> 10.153.5.40:5060
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP
10.153.5.40;rport=5060;received=10.153.5.40;branch=z9hG4bK7a0b.5673b4d4000000000000000000000000.0
Call-ID: 2332840947916a3e-39417(a)10.153.5.40
From: <sip:3408@192.168.50.107>;tag=b2f228866a24b161d346cfb256d45132-a0527658
To: <sip:3408@192.168.50.107>;tag=z9hG4bK7a0b.5673b4d4000000000000000000000000.0
CSeq: 11 REGISTER
WWW-Authenticate: Digest
realm="vpp",nonce="1690279244/67fc12dbaf6a76fa34181a4bd504de00",opaque="5adc30b867f02d18",algorithm=md5,qop="auth"
Server: Asterisk
Content-Length: 0
```
### Possible Solutions
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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`
```
version: kamailio 5.6.4 (x86_64/linux)
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST,
DNS_IP_HACK, 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_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_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: unknown
compiled with gcc 11.3.0
```
* **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`)
-->
```
5.15.0-76-generic #83-Ubuntu SMP Thu Jun 15 19:16:32 UTC 2023 x86_64 x86_64 x86_64
GNU/Linux
```
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