Merge branch 'PHP-8.0' into PHP-8.1

* PHP-8.0:
  Fix GH-9033: Loading blacklist file can fail due to negative length

Author: cmb69

NEWS

@@ -19,6 +19,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-9008 (mb_detect_encoding(): wrong results with null $encodings).
     (cmb)
 
+- OPcache:
+  . Fixed bug GH-9033 (Loading blacklist file can fail due to negative length).
+    (cmb)
+
 04 Aug 2022, PHP 8.1.9
 
 - CLI:

ext/opcache/zend_accelerator_blacklist.c

@@ -276,12 +276,12 @@ static void zend_accel_blacklist_loadone(zend_blacklist *blacklist, char *filena
 		}
 
 		/* strip \" */
-		if (pbuf[0] == '\"' && pbuf[path_length - 1]== '\"') {
+		if (path_length > 0 && pbuf[0] == '\"' && pbuf[path_length - 1]== '\"') {
 			*pbuf++ = 0;
 			path_length -= 2;
 		}
 
-		if (path_length == 0) {
+		if (path_length <= 0) {
 			continue;
 		}