From 1c1df0d9370fa5a14644850f09a7f9377bfc83be Mon Sep 17 00:00:00 2001
From: Xinchen Hui <laruence@gmail.com>
Date: Mon, 13 Nov 2017 11:05:05 +0800
Subject: [PATCH] Fixed bug #75511 (fread not free unused buffer)

---
 NEWS                | 3 +++
 ext/standard/file.c | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/NEWS b/NEWS
index 05bbd5c06d3..8b592a410e9 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,9 @@ PHP                                                                        NEWS
   . Fixed bug #75384 (PHP seems incompatible with OneDrive files on demand).
     (Anatol)
 
+- Standard:
+  . Fixed bug #75511 (fread not free unused buffer). (Laruence)
+
 23 Nov 2017, PHP 7.1.12
 
 - Core:
diff --git a/ext/standard/file.c b/ext/standard/file.c
index 52aa07b0b68..da10f58b657 100644
--- a/ext/standard/file.c
+++ b/ext/standard/file.c
@@ -1771,6 +1771,10 @@ PHPAPI PHP_FUNCTION(fread)
 
 	/* needed because recv/read/gzread doesnt put a null at the end*/
 	Z_STRVAL_P(return_value)[Z_STRLEN_P(return_value)] = 0;
+
+	if (len > Z_STRLEN_P(return_value) * 2) {
+		Z_STR_P(return_value) = zend_string_truncate(Z_STR_P(return_value), Z_STRLEN_P(return_value), 0);
+	}
 }
 /* }}} */