Segfault

Description

PHP config: https://paste.daniil.it/config

gdb backtrace:

(gdb) backtrace
#0  0x0000561fa234fd48 in ZEND_INIT_NS_FCALL_BY_NAME_SPEC_CONST_HANDLER () at ./Zend/zend_vm_execute.h:56188
#1  execute_ex (ex=0x7fbe32a15630) at ./Zend/zend_vm_execute.h:56188
#2  0x0000561fa2354701 in zend_execute (op_array=0x7fbe32a7e000, return_value=0x0) at ./Zend/zend_vm_execute.h:60396
#3  0x0000561fa22e1e55 in zend_execute_scripts (type=type@entry=8, retval=retval@entry=0x0, file_count=file_count@entry=3) at ./Zend/zend.c:1827
#4  0x0000561fa227d3fa in php_execute_script (primary_file=<optimized out>) at ./main/main.c:2542
#5  0x0000561fa23cb50a in do_cli (argc=9, argv=0x561fa37bd170) at ./sapi/cli/php_cli.c:964
#6  0x0000561fa210dc5b in main (argc=9, argv=0x561fa37bd170) at ./sapi/cli/php_cli.c:1333

zbacktrace:

(gdb) zbacktrace
[0x7fbe32a15570] Zoon\Cache\Provider\Redis->getRedisClient() /zoon/zoon/vendor/zoon/cache/src/Provider/Redis.php:69
[0x7fbe32a15400] Zoon\Cache\Provider\Redis->getInternal("system_load_v2:z216:local_load", "") /zoon/zoon/vendor/zoon/cache/src/Provider/Redis.php:151
[0x7fbe32a15320] Zoon\Cache\Provider\CacheProvider->get("system_load_v2:z216:local_load", "") /zoon/zoon/vendor/zoon/cache/src/Provider/CacheProvider.php:144
// more stuff

Redis.php:69 is weird, because it points to the array_key_exists in closeRedisConnection, not the getRedisClient function mentioned in the backtrace, which by the way have the following code

        private function getRedisClient(): RedisClient {
                $pid = getmypid();
                $serverKey = "{$pid}:{$this->params['host']}:{$this->params['port']}";
                if (!array_key_exists($serverKey, self::$instances)) {
                        self::$instances[$serverKey] = new RedisClient(
                                $this->params['host'],
                                $this->params['port'],
                                $this->params['database'],
                                $this->params['connect_timeout'],
                                $this->params['max_reconnect'] ?? 0,
                        );
                }

                return self::$instances[$serverKey];
        }

        private function closeRedisConnection() {
                $pid = getmypid();
                $serverKey = "{$pid}:{$this->params['host']}:{$this->params['port']}";
                if (array_key_exists($serverKey, self::$instances)) {
                        try {
                                self::$instances[$serverKey]->close();
                        } catch (\Throwable $e) {
                                trigger_error($e->getMessage(), E_USER_WARNING);
                        } finally {
                                unset(self::$instances[$serverKey]);
                        }
                }
        }

Feel free to tag me if further inspection of the coredump is neeed.

ref: compressed_coredump-php.113283.1688702030

PHP Version

PHP 8.2.7

Operating System

Ubuntu 20.04, ondrej repos

Bắt đầu với dữ liệu gdb và zbacktrace, đặc biệt là Zend/zend_vm_execute.h:56188, main/main.c:2542 và vendor/zoon/cache/src/Provider/Redis.php:69; kiểm tra coredump đã nén được tham chiếu nếu có. Hoàn thành nghĩa là xác định được nguyên nhân có thể tái hiện của segfault và thêm một regression test hoặc một bản sửa lỗi đã được xác minh khác.