socket.c: SEGV in bbs_node_readline

[InterLinked1]

[2023-10-08 22:46:26.199]   DEBUG[1833151]: socket.c:906 __bbs_tcp_listener: Accepting new TELNET connection from 218.150.111.190
[2023-10-08 22:46:26.199]   DEBUG[1833151]: socket.c:907 __bbs_tcp_listener: accepted fd = 54
[2023-10-08 22:46:26.199]   DEBUG[1833151]: node.c:275 __bbs_node_request: Allocated new node with ID 3
[2023-10-08 22:46:26.200]   DEBUG[1833151]: net_telnet.c:69 telnet_send_command: Sent Telnet command: IAC WILL ECHO
[2023-10-08 22:46:26.200]   DEBUG[1833151]: net_telnet.c:69 telnet_send_command: Sent Telnet command: IAC DO NAWS
[2023-10-08 22:46:26.400]   DEBUG[1861098]: thread.c:95 thread_register: Thread 1861098 spawned from handler               started by thread 1833151 at socket.c:916 __bbs_tcp_listener()
[2023-10-08 22:46:26.401]   DEBUG[1861098]: node.c:1401 bbs_node_begin: Running BBS for node 3
[2023-10-08 22:46:26.401]    AUTH[1861098]: node.c:1402 bbs_node_begin: New TELNET connection to node 3 from 218.150.111.190:43329
[2023-10-08 22:46:26.401]   DEBUG[1861098]: node.c:389 bbs_node_safe_sleep: Sleeping on node 3 for 300 ms
[2023-10-08 22:46:26.402]   DEBUG[1861099]: thread.c:95 thread_register: Thread 1861099 spawned from pty_master            started by thread 1861098 at pty.c:241 bbs_pty_allocate()
[2023-10-08 22:46:27.153]   DEBUG[1861098]: socket.c:2462 bbs_node_wait_key: Waiting 75000 ms for any input
[2023-10-08 22:46:27.153]   DEBUG[1861098]: term.c:116 bbs_node_set_input: Node 3 (fd 58): input now unbuffered, echo disabled
[2023-10-08 22:46:28.303] WARNING[1861094]: socket.c:1497 bbs_node_read: Node 4 has no active slave fd
[2023-10-08 22:46:28.316]   DEBUG[1861098]: socket.c:1951 bbs_node_flush_input: Flushed 3 bytes
Segmentation fault (core dumped)

Thread 1 (Thread 0x7fa2f27f46c0 (LWP 1861094)):
#0  __memchr_avx2 () at ../sysdeps/x86_64/multiarch/memchr-avx2.S:224
#1  0x0000562acfeaa45d in bbs_node_readline (node=node@entry=0x7fa2f8004be0, ms=ms@entry=60000, buf=<optimized out>, buf@entry=0x7fa2f27f3990 "\377\373\037\377\372\037", len=len@entry=64) at socket.c:1772
        bytes = 18446744073709551615
        res = <optimized out>
        left = <optimized out>
        bytes_read = <optimized out>
        startbuf = 0x7fa2f27f3990 "\377\373\037\377\372\037"
        term = <optimized out>
        nterm = 0x7fa2f27f3996 ""
        keep_trying = <optimized out>
        __func__ = "bbs_node_readline"
#2  0x0000562acfe9d6f2 in authenticate (node=node@entry=0x7fa2f8004be0) at node.c:1086
        attempts = 1
        username = "\377\373\037\377\372\037\000P\000\030\377\360telnet\000\000\000\000\000\000\340K\000\370\242\177\000\000\001\005\354\317*V\000\0008@\354\317*V\000\0000;\177\362\242\177\000\000\237m;\036\243\177\000"
        password = '\000' <repeats 63 times>
        __func__ = "authenticate"
#3  0x0000562acfe9f708 in node_intro (node=<optimized out>) at node.c:1224
        timebuf = "Sun Oct  8 2023 10:46 pm UTC"
        __func__ = "node_intro"
        __func__ = "node_handler_term"
        node = 0x7fa2f8004be0
#4  node_handler_term (node=0x7fa2f8004be0) at node.c:1371
        __func__ = "node_handler_term"
        node = 0x7fa2f8004be0
#5  bbs_node_handler (varg=varg@entry=0x7fa2f8004be0) at node.c:1425
        node = 0x7fa2f8004be0
#6  0x0000562acfeb07c7 in thread_run (data=<optimized out>) at thread.c:357
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {140338061571952, 5789364465541002948, 1, 140337922250224, 140337922172976, 140337821466624, 5789364465413076676, 236315176599500484}, __mask_was_saved = 0}}, __pad = {0x7fa>
        __cancel_routine = 0x562acfeb0a80 <thread_unregister>
        __cancel_arg = 0x7fa2f27f46c0
        __not_first_call = <optimized out>
        ret = <optimized out>
        a = {start_routine = <optimized out>, data = <optimized out>, name = 0x7fa2f80115f0 "handler", ' ' <repeats 15 times>, "started by thread 1833151 at socket.c:916 __bbs_tcp_listener()", detached = <optimized out>}