Fixed bug #69121 (Segfault in get_current_user when script owner is not in passwd with ZTS build)

Author: laruence

NEWS

@@ -3,6 +3,8 @@ PHP                                                                        NEWS
 ?? ??? 2015, PHP 5.5.23
 
 - Core:
+  . Fixed bug #69121 (Segfault in get_current_user when script owner is not
+    in passwd with ZTS build). (dan at syneto dot net)
   . Fixed bug #65593 (Segfault when calling ob_start from output buffering 
     callback). (Mike)
   . Fixed bug #69017 (Fail to push to the empty array with the constant value

main/main.c

@@ -1247,6 +1247,11 @@ PHPAPI char *php_get_current_user(TSRMLS_D)
 			return "";
 		}
 		pwd = &_pw;
+
+		if (retpwptr == NULL) {
+			efree(pwbuf);
+			return "";
+		}
 #else
 		if ((pwd=getpwuid(pstat->st_uid))==NULL) {
 			return "";