ctylihuai created an issue (kamailio/kamailio#4238)

### Description

The Kamailio “P” node responsible for 5G messaging encountered an unhandled exception and generated a core dump during operation . This node had been continuously running for over one month (34 days) without any issues, and the failure occurred only once . As of now, no reproducible steps have been identified to trigger the problem again

### Troubleshooting

#### Reproduction It cannot be reproduced for the time being

#### Debugging Data

``` (gdb) bt full #0 0x0000aaaac25ffd10 in local_timer_list_expire (l=0xaaaac29ef340 <tcp_main_ltimer>, t=1691001057, h=0xaaaac2a10158 <tcp_main_ltimer+134680>) at core/local_timer.c:193 tl = 0xaaaac2a7b528 <tcp_reader_ltimer+197384> ret = 0 #1 0x0000aaaac25ffe98 in local_timer_expire (h=0xaaaac29ef340 <tcp_main_ltimer>, t=1691001057) at core/local_timer.c:222 No locals. #2 0x0000aaaac260031c in local_timer_run (lt=0xaaaac29ef340 <tcp_main_ltimer>, saved_ticks=1691001057) at core/local_timer.c:245 __func__ = "local_timer_run" #3 0x0000aaaac2552bec in tcp_timer_run () at core/tcp_main.c:4875 ticks = 1691001057 #4 0x0000aaaac2555074 in tcp_main_loop () at core/tcp_main.c:5060 si = 0x0 r = 48 __func__ = "tcp_main_loop" #5 0x0000aaaac23d24b0 in main_loop () at main.c:1945 i = 48 pid = 0 si = 0x0 si_desc = "udp receiver child=47 sock=10.185.16.12:5060\000\000\000\000\000\027\065\215sw\247\235\060\346\256\310\377\377\000\000|\312p\302\252\252\000\000@\346\256\310\377\377\000\000\000\263\252\302\252\252\000\000\200\346\256\310\377\377\000\000\n\000\000\000\000\000\000\000\200\346\256\310\377\377\000\000\250\345=\302\252\252\000\000\200\346\256\310\377\377\000" nrprocs = 48 woneinit = 1 __func__ = "main_loop" #6 0x0000aaaac23de5f4 in main (argc=19, argv=0xffffc8aeebe8) at main.c:3212 cfg_stream = 0xaaaafeb0d260 c = -1 r = 0 tmp = 0xffffc8aefe85 "" tmp_len = -1484867064 port = 65535 proto = -1487420584 ahost = 0x0 aport = 0 options = 0xaaaac28ec2a0 ":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 = 3762187974 rfd = 4 debug_save = 0 debug_flag = 0 dont_fork_cnt = 2 ---Type <return> to continue, or q <return> to quit--- n_lst = 0xffffc8aee8f8 p = 0x0 st = {st_dev = 64772, st_ino = 4298835, st_mode = 16877, st_nlink = 2, st_uid = 103, st_gid = 105, st_rdev = 0, __pad1 = 0, st_size = 6, st_blksize = 4096, __pad2 = 0, st_blocks = 0, st_atim = { tv_sec = 0, tv_nsec = 0}, st_mtim = {tv_sec = 1733885384, tv_nsec = 0}, st_ctim = {tv_sec = 1737443001, tv_nsec = 2493470}, __glibc_reserved = {0, 0}} tbuf = "\210\351\256\310\377\377\000\000\204\351\256\310\377\377\000\000\002\b \200\002\b \200\260\351\256\310\377\377\000\000\234\303~\247\377\377\000\000\230e;\330\000\000\000\000\310*\201\247\377\377\000\000\330\fi\247\377\377\000\000\310\352\256\310\377\377\000\000\070\353\256\310\377\377\000\000\000\000\000\000\000\000\000\000@'\201\247\377\377\000\000\000\000\000\000\000\000\000\000X\352\256\310\377\377\000\000h\352\256\310\377\377\000\000\001", '\000' <repeats 15 times>, "\230e;\330\000\000\000\000h'\201\247\377\377\000\000\000\000\000\000\000\000\000\000X\352\256\310\377\377\000\000h\352\256\310\377\377\000\000\320\352\256\310\377\377\000\000\330\fi\247\377\377\000\000\210\351\256\310\377\377\000\000"... option_index = 12 long_options = {{name = 0xaaaac28ee678 "help", has_arg = 0, flag = 0x0, val = 104}, {name = 0xaaaac28e9410 "version", has_arg = 0, flag = 0x0, val = 118}, {name = 0xaaaac28ee680 "alias", has_arg = 1, flag = 0x0, val = 1024}, {name = 0xaaaac28ee688 "subst", has_arg = 1, flag = 0x0, val = 1025}, {name = 0xaaaac28ee690 "substdef", has_arg = 1, flag = 0x0, val = 1026}, { name = 0xaaaac28ee6a0 "substdefs", has_arg = 1, flag = 0x0, val = 1027}, {name = 0xaaaac28ee6b0 "server-id", has_arg = 1, flag = 0x0, val = 1028}, {name = 0xaaaac28ee6c0 "loadmodule", has_arg = 1, flag = 0x0, val = 1029}, {name = 0xaaaac28ee6d0 "modparam", has_arg = 1, flag = 0x0, val = 1030}, {name = 0xaaaac28ee6e0 "log-engine", has_arg = 1, flag = 0x0, val = 1031}, { name = 0xaaaac28ee6f0 "debug", has_arg = 1, flag = 0x0, val = 1032}, {name = 0xaaaac28ee6f8 "cfg-print", has_arg = 0, flag = 0x0, val = 1033}, {name = 0xaaaac28ee708 "atexit", has_arg = 1, flag = 0x0, val = 1034}, {name = 0xaaaac28ee710 "all-errors", has_arg = 0, flag = 0x0, val = 1035}, {name = 0x0, has_arg = 0, flag = 0x0, val = 0}} __func__ = "main" (gdb) p tl $30 = (struct timer_ln *) 0xaaaac2a7b528 <tcp_reader_ltimer+197384> (gdb) p *tl $31 = {next = 0x0, prev = 0xaaaac2a10158 <tcp_main_ltimer+134680>, expire = 0, initial_timeout = 0, data = 0x0, f = 0x0, flags = 0, slow_idx = 0} (gdb) p *h $10 = {next = 0x0, prev = 0xfff8adcef5d8}

循环打印 h->prev内容 $177 = (struct timer_ln *) 0xaaaac2a10158 <tcp_main_ltimer+134680> next = 0x0, prev = 0xfff8adcef5d8 $178 = (struct timer_ln * volatile) 0xfff8adcef5d8 next = 0xaaaac2a10158 <tcp_main_ltimer+134680>, prev = 0xfff9437ede60 $179 = (struct timer_ln *) 0xfff9437ede60 next = 0xfff8adcef5d8, prev = 0xfffa58c31970 $180 = (struct timer_ln *) 0xfffa58c31970 next = 0xfff9437ede60, prev = 0xaaaac2a1bd48 $181 = (struct timer_ln *) 0xaaaac2a1bd48 <tcp_main_ltimer+182792> next = 0xfffa58c31970, prev = 0xfffa53da92a8 $182 = (struct timer_ln *) 0xfffa53da92a8 next = 0xaaaac2a1bd48 <tcp_main_ltimer+182792>, prev = 0xfff96e22e0e0 $183 = (struct timer_ln *) 0xfff96e22e0e0 next = 0xfffa53da92a8, prev = 0xfffa4f642a28 $184 = (struct timer_ln *) 0xfffa4f642a28 next = 0xfff96e22e0e0, prev = 0xfff880261368 $185 = (struct timer_ln *) 0xfff880261368 next = 0xfffa4f642a28, prev = 0xfff99e55db30 $186 = (struct timer_ln *) 0xfff99e55db30 next = 0xfff880261368, prev = 0xfff99fe12eb0 $187 = (struct timer_ln *) 0xfff99fe12eb0 next = 0xfff99e55db30, prev = 0xfffa7f14dfa8 $188 = (struct timer_ln *) 0xfffa7f14dfa8 next = 0xfff99fe12eb0, prev = 0xaaaac2a21658 <tcp_main_ltimer+205592 $189 = (struct timer_ln *) 0xaaaac2a21658 <tcp_main_ltimer+205592> next = 0xfffa7f14dfa8, prev = 0xfff82902dfb8 $190 = (struct timer_ln *) 0xfff82902dfb8 next = 0xaaaac2a21658 <tcp_main_ltimer+205592>, prev = 0xfffa3728f340 $191 = (struct timer_ln *) 0xfffa3728f340 next = 0xfff82902dfb8, prev = 0xfff8f0b5ec40 $192 = (struct timer_ln *) 0xfff8f0b5ec40 next = 0xfffa3728f340, prev = 0xfffaa900c338 $193 = (struct timer_ln *) 0xfffaa900c338 next = 0xfff8f0b5ec40, prev = 0xfff888f53088 $194 = (struct timer_ln *) 0xfff888f53088 next = 0xfffaa900c338, prev = 0xfff79d06ff60 $195 = (struct timer_ln *) 0xfff79d06ff60 next = 0xfff888f53088, prev = 0xfff8eea80ff8 $196 = (struct timer_ln *) 0xfff8eea80ff8 next = 0xfffa38e4f870, prev = 0xfff83d1a6a18 $197 = (struct timer_ln *) 0xfff83d1a6a18 next = 0xfff8eea80ff8, prev = 0xfffa5c69fb48 $198 = (struct timer_ln *) 0xfffa5c69fb48 next = 0xfff83d1a6a18, prev = 0xfff8b5c31c58 $199 = (struct timer_ln *) 0xfff8b5c31c58 next = 0xfffa5c69fb48, prev = 0xfff9a4ac6688 $200 = (struct timer_ln *) 0xfff9a4ac6688 next = 0xfff8b5c31c58, prev = 0xfff9e3ee0200 $201 = (struct timer_ln *) 0xfff9e3ee0200 next = 0xfff9a4ac6688, prev = 0xaaaac2a267b8 $202 = (struct timer_ln *) 0xaaaac2a267b8 <tcp_main_ltimer+226424> next = 0xfff9e3ee0200, prev = 0xfff9b6b00188 $203 = (struct timer_ln *) 0xfff9b6b00188 next = 0xaaaac2a267b8 <tcp_main_ltimer+226424>, prev = 0xfffa38e4f870 $204 = (struct timer_ln *) 0xfffa38e4f870 next = 0xfff9b6b00188, prev = 0xfff8eea80ff8 $205 = (struct timer_ln *) 0xfff8eea80ff8 next = 0xfffa38e4f870, prev = 0xfff83d1a6a18 $206 = (struct timer_ln *) 0xfff83d1a6a18 next = 0xfff8eea80ff8, prev = 0xfffa5c69fb48 $207 = (struct timer_ln *) 0xfffa5c69fb48 next = 0xfff83d1a6a18, prev = 0xfff8b5c31c58 $208 = (struct timer_ln *) 0xfff8b5c31c58 next = 0xfffa5c69fb48, prev = 0xfff9a4ac6688 $209 = (struct timer_ln *) 0xfff9a4ac6688 next = 0xfff8b5c31c58, prev = 0xfff9e3ee0200 $210 = (struct timer_ln *) 0xfff9e3ee0200 next = 0xfff9a4ac6688, prev = 0xaaaac2a267b8 <tcp_main_ltimer+226424> $211 = (struct timer_ln *) 0xaaaac2a267b8 <tcp_main_ltimer+226424> next = 0xfff9e3ee0200, prev = 0xfff9b6b00188 $212 = (struct timer_ln *) 0xfff9b6b00188 next = 0xaaaac2a267b8 <tcp_main_ltimer+226424>, prev = 0xfffa38e4f870 $213 = (struct timer_ln *) 0xfffa38e4f870 next = 0xfff9b6b00188, prev = 0xfff8eea80ff8

(gdb) set $node = h->prev (gdb) while ($node != 0)

print *$node set $node = $node->prev end

$50 = {next = 0xaaaac2a10158 <tcp_main_ltimer+134680>, prev = 0xfff9437ede60, expire = 1691004064, initial_timeout = 5760, data = 0xfff8adcef430, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $51 = {next = 0xfff8adcef5d8, prev = 0xfffa58c31970, expire = 1691004064, initial_timeout = 5760, data = 0xfff9437edcb8, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $52 = {next = 0xfff9437ede60, prev = 0xaaaac2a1bd48 <tcp_main_ltimer+182792>, expire = 1691004064, initial_timeout = 5760, data = 0xfffa58c317c8, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $53 = {next = 0xfffa58c31970, prev = 0xfffa53da92a8, expire = 3125221032, initial_timeout = 65529, data = 0xfffa51099620, f = 0xfff7f9d36838, flags = 4191381560, slow_idx = 65527} $54 = {next = 0xaaaac2a1bd48 <tcp_main_ltimer+182792>, prev = 0xfff96e22e0e0, expire = 1691004064, initial_timeout = 5760, data = 0xfffa53da9100, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $55 = {next = 0xfffa53da92a8, prev = 0xfffa4f642a28, expire = 1691004064, initial_timeout = 5760, data = 0xfff96e22df38, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $56 = {next = 0xfff96e22e0e0, prev = 0xfff880261368, expire = 1691004064, initial_timeout = 5760, data = 0xfffa4f642880, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $57 = {next = 0xfffa4f642a28, prev = 0xfff99e55db30, expire = 1691005489, initial_timeout = 5760, data = 0xfff8802611c0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $58 = {next = 0xfff880261368, prev = 0xfff99fe12eb0, expire = 1691005489, initial_timeout = 5760, data = 0xfff99e55d988, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $59 = {next = 0xfff99e55db30, prev = 0xfffa7f14dfa8, expire = 1691005489, initial_timeout = 5760, data = 0xfff99fe12d08, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $60 = {next = 0xfff99fe12eb0, prev = 0xaaaac2a21658 <tcp_main_ltimer+205592>, expire = 1691005489, initial_timeout = 5760, data = 0xfffa7f14de00, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $61 = {next = 0xfffa7f14dfa8, prev = 0xfff82902dfb8, expire = 888530032, initial_timeout = 65528, data = 0xfff81b870028, f = 0xfff798f80cc0, flags = 522077992, slow_idx = 65529} $62 = {next = 0xaaaac2a21658 <tcp_main_ltimer+205592>, prev = 0xfffa3728f340, expire = 1691005489, initial_timeout = 5760, data = 0xfff82902de10, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $63 = {next = 0xfff82902dfb8, prev = 0xfff8f0b5ec40, expire = 1691005489, initial_timeout = 5760, data = 0xfffa3728f198, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $64 = {next = 0xfffa3728f340, prev = 0xfffaa900c338, expire = 1691005489, initial_timeout = 5760, data = 0xfff8f0b5ea98, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $65 = {next = 0xfff8f0b5ec40, prev = 0xfff888f53088, expire = 1691005489, initial_timeout = 5760, data = 0xfffaa900c190, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $66 = {next = 0xfffaa900c338, prev = 0xfff79d06ff60, expire = 1691005489, initial_timeout = 5760, data = 0xfff888f52ee0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $67 = {next = 0xfff888f53088, prev = 0xfff8eea80ff8, expire = 1691005489, initial_timeout = 5760, data = 0xfff79d06fdb8, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $68 = {next = 0xfffa38e4f870, prev = 0xfff83d1a6a18, expire = 1691006791, initial_timeout = 5760, data = 0xfff8eea80e50, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $69 = {next = 0xfff8eea80ff8, prev = 0xfffa5c69fb48, expire = 1691006791, initial_timeout = 5760, data = 0xfff83d1a6870, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $70 = {next = 0xfff83d1a6a18, prev = 0xfff8b5c31c58, expire = 1691006791, initial_timeout = 5760, data = 0xfffa5c69f9a0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $71 = {next = 0xfffa5c69fb48, prev = 0xfff9a4ac6688, expire = 1691006791, initial_timeout = 5760, data = 0xfff8b5c31ab0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $72 = {next = 0xfff8b5c31c58, prev = 0xfff9e3ee0200, expire = 1691006791, initial_timeout = 5760, data = 0xfff9a4ac64e0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $73 = {next = 0xfff9a4ac6688, prev = 0xaaaac2a267b8 <tcp_main_ltimer+226424>, expire = 1691006791, initial_timeout = 5760, data = 0xfff9e3ee0058, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $74 = {next = 0xfff9e3ee0200, prev = 0xfff9b6b00188, expire = 1429254648, initial_timeout = 65528, data = 0xfff88564eb80, f = 0xfff9cc7da958, flags = 881566008, slow_idx = 65529} $75 = {next = 0xaaaac2a267b8 <tcp_main_ltimer+226424>, prev = 0xfffa38e4f870, expire = 1691006791, initial_timeout = 5760, data = 0xfff9b6afffe0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $76 = {next = 0xfff9b6b00188, prev = 0xfff8eea80ff8, expire = 1691006791, initial_timeout = 5760, data = 0xfffa38e4f6c8, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $77 = {next = 0xfffa38e4f870, prev = 0xfff83d1a6a18, expire = 1691006791, initial_timeout = 5760, data = 0xfff8eea80e50, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $78 = {next = 0xfff8eea80ff8, prev = 0xfffa5c69fb48, expire = 1691006791, initial_timeout = 5760, data = 0xfff83d1a6870, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $79 = {next = 0xfff83d1a6a18, prev = 0xfff8b5c31c58, expire = 1691006791, initial_timeout = 5760, data = 0xfffa5c69f9a0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $80 = {next = 0xfffa5c69fb48, prev = 0xfff9a4ac6688, expire = 1691006791, initial_timeout = 5760, data = 0xfff8b5c31ab0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $81 = {next = 0xfff8b5c31c58, prev = 0xfff9e3ee0200, expire = 1691006791, initial_timeout = 5760, data = 0xfff9a4ac64e0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} ---Type <return> to continue, or q <return> to quit--- $82 = {next = 0xfff9a4ac6688, prev = 0xaaaac2a267b8 <tcp_main_ltimer+226424>, expire = 1691006791, initial_timeout = 5760, data = 0xfff9e3ee0058, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} $83 = {next = 0xfff9e3ee0200, prev = 0xfff9b6b00188, expire = 1429254648, initial_timeout = 65528, data = 0xfff88564eb80, f = 0xfff9cc7da958, flags = 881566008, slow_idx = 65529} $84 = {next = 0xaaaac2a267b8 <tcp_main_ltimer+226424>, prev = 0xfffa38e4f870, expire = 1691006791, initial_timeout = 5760, data = 0xfff9b6afffe0, f = 0xaaaac2551690 <tcpconn_main_timeout>, flags = 512, slow_idx = 0} ```

#### Log Messages

``` 2025-05-02T05:39:54.151913300Z 84(131) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([49.69.41.98]:36121 ->84(131) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [10.185.18.67]:5260) 2025-05-02T05:39:54.152035620Z 84(131) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfff7cd0a8ba0 r: 0xfff7cd0a8cc8 (-1) 2025-05-02T05:39:54.152046140Z 84(131) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([110.252.23.203]:27380 ->84(131) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [10.185.18.67]:5260) 2025-05-02T05:39:54.152053220Z 84(131) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfff9a1658f08 r: 0xfff9a1659030 (-1) 2025-05-02T05:39:54.152067100Z 84(131) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([240e:440:1b18:1fb3:22:da32:6be9:33e7]:50529 ->84(131) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [240e:954:2000:208::31]:5460) 2025-05-02T05:39:54.152468020Z 90(137) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([124.236.136.161]:13636 ->90(137) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [10.185.18.67]:5260) 2025-05-02T05:39:54.152535370Z 87(134) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([111.61.229.67]:41796 ->87(134) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [10.185.18.67]:5260) 2025-05-02T05:39:54.152895350Z 84(131) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfffa8d174330 r: 0xfffa8d174458 (-1) 2025-05-02T05:39:54.152916500Z 84(131) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([240e:440:9a08:24:1444:71da:9ff4:a6e6]:57851 ->84(131) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [240e:954:2000:208::31]:5460) 2025-05-02T05:39:54.153179200Z 90(137) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfffa45cedc18 r: 0xfffa45cedd40 (-1) 2025-05-02T05:39:54.153425390Z 87(134) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfffa22771e70 r: 0xfffa22771f98 (-1) 2025-05-02T05:39:54.153520770Z 84(131) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfff83da65638 r: 0xfff83da65760 (-1) 2025-05-02T05:39:54.153540580Z 84(131) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([2408:8431:6810:2e2:1cbb:1c9e:63e6:abf1]:61717 ->84(131) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [240e:954:2000:208::31]:5260) 2025-05-02T05:39:54.154460230Z 84(131) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfff7ccf40938 r: 0xfff7ccf40a60 (-1) 2025-05-02T05:39:54.154502480Z 84(131) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([123.182.115.202]:21533 ->84(131) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [10.185.18.67]:5260) 2025-05-02T05:39:54.154629490Z 84(131) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfff89ae41378 r: 0xfff89ae414a0 (-1) 2025-05-02T05:39:54.154649140Z 84(131) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection timed out (110) ([183.199.201.13]:3125 ->84(131) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [10.185.18.67]:5260) 2025-05-02T05:39:54.154830180Z 84(131) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfff9acc5d970 r: 0xfff9acc5da98 (-1) 2025-05-02T05:39:54.173624940Z 90(137) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfff7de186590 r: 0xfff7de1866b8 (-1) 2025-05-02T05:39:54.325541260Z 117(164) ERROR: <core> [core/tcp_read.c:297]: tcp_read_data(): error reading: Connection reset by peer (104) ([171.114.149.119]:18629 ->117(164) ERROR: <core> [core/tcp_read.c:299]: tcp_read_data(): -> [10.185.18.67]:5260) 2025-05-02T05:39:54.325597230Z 117(164) ERROR: <core> [core/tcp_read.c:1556]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0xfff83556b7e0 r: 0xfff83556b908 (-1) 2025-05-02T05:39:54.395159000Z 41(88) ERROR: <core> [core/tcp_main.c:1406]: tcp_do_connect(): connect 183.198.156.45:1272 failed Cannot assign requested address 2025-05-02T05:39:54.395211960Z 41(88) ERROR: <core> [core/tcp_main.c:1409]: tcp_do_connect(): connect 183.198.156.45:1272: (99) Cannot assign requested address 2025-05-02T05:39:54.395220020Z 41(88) ERROR: <core> [core/tcp_main.c:1545]: tcpconn_finish_connect(): 183.198.156.45:1272: tcp_do_connect for 0xfff95f7037e0 failed 2025-05-02T05:39:54.395226280Z 41(88) ERROR: <core> [core/tcp_main.c:2200]: tcp_send(): 183.198.156.45:1272: tcpconn_finish_connect(0xfff95f7037e0) failed 2025-05-02T05:39:54.395232270Z 41(88) ERROR: tm [../../core/forward.h:290]: msg_send_buffer(): tcp_send failed 2025-05-02T05:39:54.395337640Z 41(88) ERROR: sl [sl_funcs.c:415]: sl_reply_error(): stateless error reply used: Unfortunately error on sending to next hop occurred (477/SL) 2025-05-02T05:39:54.484799620Z 19(66) ERROR: <core> [core/tcp_main.c:1406]: tcp_do_connect(): connect 1.202.124.130:54952 failed Cannot assign requested address 2025-05-02T05:39:54.484847710Z 19(66) ERROR: <core> [core/tcp_main.c:1409]: tcp_do_connect(): connect 1.202.124.130:54952: (99) Cannot assign requested address 2025-05-02T05:39:54.484882280Z 19(66) ERROR: <core> [core/tcp_main.c:1545]: tcpconn_finish_connect(): 1.202.124.130:54952: tcp_do_connect for 0xfff9c7c0d500 failed 2025-05-02T05:39:54.484889320Z 19(66) ERROR: <core> [core/tcp_main.c:2200]: tcp_send(): 1.202.124.130:54952: tcpconn_finish_connect(0xfff9c7c0d500) failed 2025-05-02T05:39:54.484894930Z 19(66) ERROR: tm [../../core/forward.h:260]: msg_send_buffer(): tcp_send failed 2025-05-02T05:39:54.484899790Z 19(66) ERROR: sl [sl_funcs.c:415]: sl_reply_error(): stateless error reply used: Unfortunately error on sending to next hop occurred (477/SL) 2025-05-02T05:39:54.759458370Z 118(165) CRITICAL: <core> [core/io_wait.h:594]: io_watch_del(): invalid fd 69, not in [0, 0) 2025-05-02T05:39:54.759506810Z 118(165) ERROR: <core> [core/tcp_read.c:1765]: tcpconn_read_timeout(): io_watch_del failed for 0xfff80ff7f860 id 65244425 fd 69, state 0, flags c018, main fd 48347 ([240e::31]:63566 -> [240e::31]:5460)

note：[240e::31] is the service address of kamailio, hiding the real IP address . ```

### Possible Solutions

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` version: kamailio 5.7.4 (x86_64/linux) fdc771 ```

* **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`) -->

``` OpenEuler 22.03 Linux localhost.localdomain 5.10.0-136.12.0.86.ctl3.x86_64 #1 SMP Fri Jan 13 08:18:12 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux ```