SIGSEGV with PHP 8.5

SIGSEGV with PHP 8.5 on 2.3.0

backtrace

* thread #1, name = 'php', stop reason = signal SIGSEGV: address not mapped to object (fault address=0x57b9d9c0)
  * frame #0: 0x00007fffedea6ea1 libodbc.so.2`SQLSetEnvAttr + 49
    frame #1: 0x00007fffede443f0 ibm_db2.so`_php_db2_connect_helper(execute_data=0x00007ffff4c173f0, return_value=0x00007ffff4c172e0, pconn_res=0x00007fffffffae58, isPersistent=0) at ibm_db2.c:2499:18
    frame #2: 0x00007fffede44bf3 ibm_db2.so`zif_db2_connect(execute_data=0x00007ffff4c173f0, return_value=0x00007ffff4c172e0) at ibm_db2.c:2870:14
    frame #3: 0x000055555604d7ec php`ZEND_DO_ICALL_SPEC_OBSERVER_HANDLER at zend_vm_execute.h:1487:2
    frame #4: 0x00005555560ced69 php`execute_ex(ex=0x00007ffff4c17020) at zend_vm_execute.h:115956:5
    frame #5: 0x00005555560d47a7 php`zend_execute(op_array=0x00007ffff4c83140, return_value=0x0000000000000000) at zend_vm_execute.h:121434:2
    frame #6: 0x0000555556178e52 php`zend_execute_script(type=8, retval=0x0000000000000000, file_handle=0x00007fffffffc650) at zend.c:1977:3
    frame #7: 0x0000555555f167c6 php`php_execute_script_ex(primary_file=0x00007fffffffc650, retval=0x0000000000000000) at main.c:2640:13
    frame #8: 0x0000555555f1694c php`php_execute_script(primary_file=0x00007fffffffc650) at main.c:2680:9
    frame #9: 0x000055555617b564 php`do_cli(argc=9, argv=0x0000555557753a60) at php_cli.c:951:5
    frame #10: 0x000055555617c5c8 php`main(argc=9, argv=0x0000555557753a60) at php_cli.c:1362:18
    frame #11: 0x00007ffff6b8ad90 libc.so.6`__libc_start_call_main(main=(php`main at php_cli.c:1190:1), argc=9, argv=0x00007fffffffda28) at libc_start_call_main.h:58:16
    frame #12: 0x00007ffff6b8ae40 libc.so.6`__libc_start_main_impl(main=(php`main at php_cli.c:1190:1), argc=9, argv=0x00007fffffffda28, init=<unavailable>, fini=<unavailable>, rtld_fini=<unavailable>, stack_end=0x00007fffffffda18) at libc-start.c:392:3

Frame 3:

Frame2:

stack trace

php script

$configuration = getEnvironmentConfiguration('IBM_DB2');
$host = $configuration['host'];
$port = $configuration['port'];
$user = $configuration['uid'];
$password = $configuration['pwd'];
$database = $configuration['database'];

    $conn_string = "DRIVER={IBM DB2 ODBC DRIVER};DATABASE=$database;" .
                   "HOSTNAME=$host;PORT=$port;PROTOCOL=TCPIP;UID=$user;PWD=$password;";
    $conn = db2_connect($conn_string, '', '');

    // Connection successful
    $stmt = db2_exec($conn, 'SELECT * FROM SYSCAT.REFERENCES');

    // Statement executed successfully
    $preparedStmt = db2_prepare($conn, 'SELECT * FROM SYSCAT.REFERENCES SC WHERE SC.TABNAME = ?');

    // Prepared statement created successfully
    db2_bind_param($preparedStmt, 1, "SYSCAT.REFERENCES", DB2_PARAM_IN);
    db2_execute($preparedStmt, array("SYSCAT.REFERENCES"));

    $ret = db2_exec($conn, 'SELECT * FROM SYSCAT.REFERENCES');
    var_dump($ret);
    db2_free_stmt($preparedStmt);

    // Close the statement
    db2_free_stmt($stmt);

    // Close the connection when done
    db2_close($conn);

Run the supplied PHP connection script with PHP 8.5 and ibm_db2 2.3.0 to reproduce the crash, then inspect ibm_db2.c at lines 2499 and 2870 alongside the backtrace. Done means db2_connect no longer segfaults and the shown connection and statement operations complete successfully.