Merge branch 'PHP-8.1' into PHP-8.2

* PHP-8.1:
  Prevent potential deadlock if accelerated globals cannot be allocated

Author: nielsdos

NEWS

@@ -52,6 +52,8 @@ PHP                                                                        NEWS
 - Opcache:
   . Fixed bug GH-10914 (OPCache with Enum and Callback functions results in
     segmentation fault). (nielsdos)
+  . Prevent potential deadlock if accelerated globals cannot be allocated.
+    (nielsdos)
 
 - PCNTL:
   . Fixed bug GH-11498 (SIGCHLD is not always returned from proc_open).

ext/opcache/ZendAccelerator.c

@@ -2867,10 +2867,10 @@ static int zend_accel_init_shm(void)
 
 	accel_shared_globals = zend_shared_alloc(accel_shared_globals_size);
 	if (!accel_shared_globals) {
+		zend_shared_alloc_unlock();
 		zend_accel_error_noreturn(ACCEL_LOG_FATAL,
 				"Insufficient shared memory for interned strings buffer! (tried to allocate %zu bytes)",
 				accel_shared_globals_size);
-		zend_shared_alloc_unlock();
 		return FAILURE;
 	}
 	memset(accel_shared_globals, 0, sizeof(zend_accel_shared_globals));