Merge branch 'PHP-7.1'

* PHP-7.1:
  Fix #73968: Premature failing of XBM reading

Author: cmb69

ext/gd/libgd/gd_xbm.c

@@ -78,7 +78,7 @@ gdImagePtr gdImageCreateFromXbm(FILE * fd)
 				max_bit = 32768;
 			}
 			if (max_bit) {
-				bytes = (width * height / 8) + 1;
+				bytes = (width + 7) / 8 * height;
 				if (!bytes) {
 					return 0;
 				}

ext/gd/tests/bug73968.phpt

@@ -0,0 +1,15 @@
+--TEST--
+Bug #73968 (Premature failing of XBM reading)
+--SKIPIF--
+<?php
+if (!extension_loaded('gd')) die('skip gd extension not available');
+?>
+--FILE--
+<?php
+$im = imagecreatefromxbm(__DIR__ . DIRECTORY_SEPARATOR . 'bug73968.xbm');
+var_dump($im);
+?>
+===DONE===
+--EXPECTF--
+resource(%d) of type (gd)
+===DONE===

ext/gd/tests/bug73968.xbm

@@ -0,0 +1,5 @@
+#define test_width 10
+#define test_height 10
+static unsigned char test_bits[] = {
+  0xFF, 0x03, 0x00, 0x00, 0xFF, 0x03, 0x00, 0x00, 0xFF, 0x03, 0x00, 0x00, 
+  0xFF, 0x03, 0x00, 0x00, 0xFF, 0x03, 0x00, 0x00};

ext/gd/tests/libgd00094-mb.phpt

@@ -11,9 +11,6 @@ $im = imagecreatefromxbm(dirname(__FILE__) . '/libgd00094私はガラスを食
 var_dump($im);
 ?>
 --EXPECTF--
-Warning: imagecreatefromxbm(): gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully
- in %slibgd00094-mb.php on line %d
-
 Warning: imagecreatefromxbm(): '%slibgd00094私はガラスを食べられます.xbm' is not a valid XBM file in %slibgd00094-mb.php on line %d
 bool(false)
 

ext/gd/tests/libgd00094.phpt

@@ -11,9 +11,6 @@ $im = imagecreatefromxbm(dirname(__FILE__) . '/libgd00094.xbm');
 var_dump($im);
 ?>
 --EXPECTF--
-Warning: imagecreatefromxbm(): gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully
- in %slibgd00094.php on line %d
-
 Warning: imagecreatefromxbm(): '%slibgd00094.xbm' is not a valid XBM file in %slibgd00094.php on line %d
 bool(false)