[SR-Users] Crash in usrloc, get_all_db_ucontacts
Daniel-Constantin Mierla
miconda at gmail.com
Wed Jan 14 14:55:42 CET 2015
On 14/01/15 14:21, Kristian F. Høgh wrote:
> Hi Daniel,
>
> # kamailio -V
> version: kamailio 3.1.1 (x86_64/linux) c274ce
> flags: STATS: Off, USE_IPV6, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, DBG_QM_MALLOC, 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, PKG_SIZE 8MB
> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
> id: c274ce
> compiled on 22:03:13 Feb 1 2011 with gcc 4.1.2
>
> I got the following in the log
> Jan 13 12:58:51 sip-3-1 /usr/local/sbin/kamailio[15124]: : <core> [pass_fd.c:293]: ERROR: receive_fd: EOF on 5
> Jan 13 12:58:52 sip-3-1 /usr/local/sbin/kamailio[15094]: ALERT: <core> [main.c:741]: child process 15115 exited by a signal 11
> Jan 13 12:58:52 sip-3-1 /usr/local/sbin/kamailio[15094]: ALERT: <core> [main.c:744]: core was generated
> Jan 13 12:58:52 sip-3-1 /usr/local/sbin/kamailio[15094]: INFO: <core> [main.c:756]: INFO: terminating due to SIGCHLD
>
> And the core file is called core.15115
>
> Hope it answers your questions.
>
> Regards,
> /Kristian.
>
>
> On Wednesday 14 January 2015 14:09:41 Daniel-Constantin Mierla wrote:
>> Hello,
>>
>> the string_val field look ok. But p variable which is assigned that
>> value a line before the reported crash is not, as reported by bt full:
>>
>> p = 0xcfcdffaf <Address 0xcfcdffaf out of bounds>
>>
>> Do you have enabled core files per process/pid? I still wonder if it is
>> a overwritten core.
>>
>> Otherwise, there might be physical problems with memory...
>>
>> By pointer addresses, I guess it is a 32b CPU, right?
>>
>> Cheers,
>> Daniel
>>
>> On 14/01/15 11:30, Kristian F. Høgh wrote:
>>> Hi Daniel,
>>>
>>> (gdb) p *row->values
>>> $1 = {type = DB1_STRING, nul = 0, free = 0, val = {int_val = 58055112, ll_val = 58055112, double_val = 2.8683036404665902e-316, time_val = 58055112, string_val = 0x375d9c8 "sip:44221xxx at 192.168.1.157:37612;rinstance=8c613319a30caff6;transport=TCP", str_val = {
>>> s = 0x375d9c8 "sip:44221xxx at 192.168.1.157:37612;rinstance=8c613319a30caff6;transport=TCP", len = 0}, blob_val = {s = 0x375d9c8 "sip:44221xxx at 192.168.1.157:37612;rinstance=8c613319a30caff6;transport=TCP", len = 0}, bitmap_val = 58055112}}
>>>
>>> (gdb) p i
>>> $2 = <value optimized out>
>>>
>>> Regards,
>>> Kristian.
>>>
>>>
>>> On Wednesday 14 January 2015 11:13:43 Daniel-Constantin Mierla wrote:
>>>> Hello,
>>>>
>>>> get also:
>>>>
>>>> p *row->values
>>>> p i
>>>>
>>>> Cheers,
>>>> Daniel
>>>>
>>>> On 14/01/15 10:50, Kristian F. Høgh wrote:
>>>>> Hi Daniel,
>>>>>
>>>>> (gdb) p *row
>>>>> $1 = {values = 0x9bd2b8, n = 13}
>>>>>
>>>>> Regards,
>>>>> Kristian.
>>>>>
>>>>>
>>>>> On Wednesday 14 January 2015 10:01:41 Daniel-Constantin Mierla wrote:
>>>>>> Hello,
>>>>>>
>>>>>> the operation done by that code is practically a sql query, fetching the
>>>>>> result and packing it for nathelper usage. It is no race between it and
>>>>>> handling any sip packet, no shared memory accessed.
>>>>>>
>>>>>> Do you get only one corefile?
>>>>>>
>>>>>> From the backtrace it looks like row pointer is not ok, can you get the
>>>>>> output for:
>>>>>>
>>>>>> p *row
>>>>>>
>>>>>> Cheers,
>>>>>> Daniel
>>>>>>
>>>>>> On 13/01/15 15:08, Kristian F. Høgh wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> On an ancient kamailio 3.1, we occasionally experience crash in the function get_all_db_ucontacts in usrloc.
>>>>>>>
>>>>>>> A backtrace reveals the following:
>>>>>>> #0 0x00002b505f2fb4ff in get_all_db_ucontacts (buf=0xadd270, len=<value optimized out>, flags=64, part_idx=1, part_max=30) at dlist.c:176
>>>>>>> 176 if (VAL_NULL(ROW_VALUES(row)+4) || p1==0 || p1[0]==0){
>>>>>>>
>>>>>>>
>>>>>>> The lines around line 176 (which look similar to trunk, except p and p1 are str today)
>>>>>>> 159 for(i = 0; i < RES_ROW_N(res); i++) {
>>>>>>> 160 row = RES_ROWS(res) + i;
>>>>>>> 161
>>>>>>> 162 /* received */
>>>>>>> 163 p = (char*)VAL_STRING(ROW_VALUES(row));
>>>>>>> 164 if ( VAL_NULL(ROW_VALUES(row)) || p==0 || p[0]==0 ) {
>>>>>>> 165 /* contact */
>>>>>>> 166 p = (char*)VAL_STRING(ROW_VALUES(row)+1);
>>>>>>> 167 if (VAL_NULL(ROW_VALUES(row)+1) || p==0 || p[0]==0) {
>>>>>>> 168 LM_ERR("empty contact -> skipping\n");
>>>>>>> 169 continue;
>>>>>>> 170 }
>>>>>>> 171 }
>>>>>>> 172 p_len = strlen(p);
>>>>>>> 173
>>>>>>> 174 /* path */
>>>>>>> 175 p1 = (char*)VAL_STRING(ROW_VALUES(row)+4);
>>>>>>> 176 if (VAL_NULL(ROW_VALUES(row)+4) || p1==0 || p1[0]==0){
>>>>>>> 177 p1 = NULL;
>>>>>>> 178 p1_len = 0;
>>>>>>> 179 } else {
>>>>>>> 180 p1_len = strlen(p1);
>>>>>>> 181 }
>>>>>>>
>>>>>>> The client from frame #2 (bt full below), send a REGISTER, which was replied "200 OK" at the same second as the crash.
>>>>>>> Is it a timing issue between REGISTER and nathelper ping?
>>>>>>>
>>>>>>> I have a trace and the core.
>>>>>>>
>>>>>>> Regards,
>>>>>>> Kristian Høgh
>>>>>>> Uni-tel
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> bt full
>>>>>>> #0 0x00002b505f2fb4ff in get_all_db_ucontacts (buf=0xadd270, len=<value optimized out>, flags=64, part_idx=1, part_max=30) at dlist.c:176
>>>>>>> sock = 0x0
>>>>>>> dbflags = 11088
>>>>>>> host = {s = 0x375ef8e "PROXY_IP:5060", len = 13}
>>>>>>> i = <value optimized out>
>>>>>>> row = 0xa13488
>>>>>>> dom = 0x2b5062723278
>>>>>>> p1 = 0x2 <Address 0x2 out of bounds>
>>>>>>> now_s = "'2015-01-13 12:58:51'\177\000\000)"
>>>>>>> port = 11088
>>>>>>> p_len = 73
>>>>>>> cp = <value optimized out>
>>>>>>> needed = 16
>>>>>>> res = 0xa2ed38
>>>>>>> p = 0xcfcdffaf <Address 0xcfcdffaf out of bounds>
>>>>>>> now_len = 21
>>>>>>> proto = 1642847400
>>>>>>> p1_len = 0
>>>>>>> shortage = 0
>>>>>>> query_buf = "select received, contact, socket, cflags, path from location where expires > '2015-01-13 12:58:51' and cflags & 64 = 64 and id % 30 = 1", '\000' <repeats 376 times>
>>>>>>> query_str = {s = 0x2b505f515520 "select received, contact, socket, cflags, path from location where expires > '2015-01-13 12:58:51' and cflags & 64 = 64 and id % 30 = 1", len = 135}
>>>>>>> #1 get_all_ucontacts (buf=0xadd270, len=<value optimized out>, flags=64, part_idx=1, part_max=30) at dlist.c:398
>>>>>>> No locals.
>>>>>>> #2 0x00002b5061eb6b1a in nh_timer (ticks=<value optimized out>, timer_idx=<value optimized out>) at nathelper.c:1623
>>>>>>> rval = <value optimized out>
>>>>>>> buf = 0xadd270
>>>>>>> cp = <value optimized out>
>>>>>>> c = {s = 0x0, len = 0}
>>>>>>> opt = {s = 0x0, len = 0}
>>>>>>> path = {s = 0x0, len = 0}
>>>>>>> curi = {user = {s = 0x0, len = 0}, passwd = {s = 0x0, len = 0}, host = {s = 0xadd836 "CLIENT_IP:62252\250u\220", len = 14}, port = {s = 0xadd845 "62252\250u\220", len = 5}, params = {s = 0x0, len = 0}, sip_params = {s = 0x0, len = 0}, headers = {
>>>>>>> s = 0x7fff110134b0 "", len = 566862356}, port_no = 50336, proto = 70, type = ERROR_URI_T, flags = 65536, transport = {s = 0x8cbfa0 "", len = 5441948}, ttl = {s = 0x7fff1101352f "", len = 4448297}, user_param = {s = 0x375ef8e "PROXY_IP:5060", len = 13},
>>>>>>> maddr = {s = 0x9204b0 "sip3", len = 10677560}, method = {s = 0x0, len = 0}, lr = {s = 0xadd84a "\250u\220", len = 0}, r2 = {s = 0xa2ebc0 "\250\272\252", len = 285291296}, transport_val = {s = 0x40 <Address 0x40 out of bounds>, len = 335544320}, ttl_val = {
>>>>>>> s = 0x3221c302d0 "H\307\300\017", len = 0}, user_param_val = {s = 0x0, len = 0}, maddr_val = {s = 0x0, len = 0}, method_val = {s = 0x0, len = 0}, lr_val = {s = 0x0, len = 0}, r2_val = {s = 0x0, len = 0}}
>>>>>>> he = <value optimized out>
>>>>>>> send_sock = <value optimized out>
>>>>>>> flags = <value optimized out>
>>>>>>> proto = <value optimized out>
>>>>>>> dst = {send_sock = 0x0, to = {s = {sa_family = 0, sa_data = '\000' <repeats 13 times>}, sin = {sin_family = 0, sin_port = 0, sin_addr = {s_addr = 0}, sin_zero = "\000\000\000\000\000\000\000"}, sin6 = {sin6_family = 0, sin6_port = 0, sin6_flowinfo = 0,
>>>>>>> sin6_addr = {in6_u = {u6_addr8 = '\000' <repeats 15 times>, u6_addr16 = {0, 0, 0, 0, 0, 0, 0, 0}, u6_addr32 = {0, 0, 0, 0}}}, sin6_scope_id = 0}}, id = 0, proto = 0 '\000', send_flags = {f = 0 '\000', blst_imask = 0 '\000'}}
>>>>>>> iteration = 1
>>>>>>> __FUNCTION__ = "nh_timer"
>>>>>>> #3 0x0000000000521c54 in fork_dummy_timer (child_id=<value optimized out>, desc=<value optimized out>, make_sock=<value optimized out>, f=0x2b5061eb6a70 <nh_timer>, param=0x0, interval=1) at timer_proc.c:71
>>>>>>> pid = <value optimized out>
>>>>>>> #4 0x00002b5061eb42ee in child_init (rank=<value optimized out>) at nathelper.c:673
>>>>>>> i = 58055190
>>>>>>> #5 0x00000000004db1d0 in init_mod_child (m=0x917dc0, rank=0) at sr_module.c:829
>>>>>>> No locals.
>>>>>>> #6 0x00000000004db1a9 in init_mod_child (m=0x918420, rank=0) at sr_module.c:826
>>>>>>> No locals.
>>>>>>> #7 0x00000000004db1a9 in init_mod_child (m=0x918aa0, rank=0) at sr_module.c:826
>>>>>>> No locals.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>>>>>> sr-users at lists.sip-router.org
>>>>>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
--
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
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