Re: [SR-Users] Crash in usrloc, get_all_db_ucontacts

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@192.168.1.157:37612;rinstance=8c613319a30caff6;transport=TCP", str_val = { >> s = 0x375d9c8 "sip:44221xxx@192.168.1.157:37612;rinstance=8c613319a30caff6;transport=TCP", len = 0}, blob_val = {s = 0x375d9c8 "sip:44221xxx@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(a)lists.sip-router.org >>>>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >