Fixed bug #63447 (max_input_vars doesn't filter variables when mbstring.encoding_translation = On)

Author: laruence

NEWS

@@ -12,6 +12,10 @@ PHP                                                                        NEWS
   . Fixed bug #63389 (Missing context check on libxml_set_streams_context()
     causes memleak). (Laruence)
 
+- Mbstring:
+  . Fixed bug #63447 (max_input_vars doesn't filter variables when
+    mbstring.encoding_translation = On). (Laruence)
+
 - MySQL:
   . Fixed compilation failure on mixed 32/64 bit systems. (Andrey)
 

ext/mbstring/mb_gpc.c

@@ -262,6 +262,12 @@ enum mbfl_no_encoding _php_mb_encoding_handler_ex(const php_mb_encoding_handler_
 		n++;
 		var = php_strtok_r(NULL, info->separator, &strtok_buf);
 	} 
+
+	if (n > (PG(max_input_vars) * 2)) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Input variables exceeded %ld. To increase the limit change max_input_vars in php.ini.", PG(max_input_vars));
+		goto out;
+	}
+
 	num = n; /* make sure to process initilized vars only */
 
 	/* initialize converter */

ext/mbstring/tests/bug63447_001.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Bug #63447 (max_input_vars doesn't filter variables when mbstring.encoding_translation = On)
+--SKIPIF--
+<?php
+extension_loaded('mbstring') or die('skip');
+?>
+--INI--
+max_input_nesting_level=10
+max_input_vars=5
+mbstring.encoding_translation=1
+--POST--
+a=1&b=2&c=3&d=4&e=5&f=6
+--FILE--
+<?php
+var_dump($_POST);
+?>
+--EXPECT--
+Warning: Unknown: Input variables exceeded 5. To increase the limit change max_input_vars in php.ini. in Unknown on line 0
+array(0) {
+}

ext/mbstring/tests/bug63447_002.phpt

@@ -0,0 +1,20 @@
+--TEST--
+Bug #63447 (max_input_vars doesn't filter variables when mbstring.encoding_translation = On)
+--SKIPIF--
+<?php
+extension_loaded('mbstring') or die('skip');
+?>
+--INI--
+max_input_nesting_level=10
+max_input_vars=4
+mbstring.encoding_translation=1
+--POST--
+a=1&b=2&c=3&d=4&e=5
+--FILE--
+<?php
+var_dump($_POST);
+?>
+--EXPECT--
+Warning: Unknown: Input variables exceeded 4. To increase the limit change max_input_vars in php.ini. in Unknown on line 0
+array(0) {
+}

ext/mbstring/tests/bug63447_003.phpt

@@ -0,0 +1,34 @@
+--TEST--
+Bug #63447 (max_input_vars doesn't filter variables when mbstring.encoding_translation = On)
+--SKIPIF--
+<?php
+extension_loaded('mbstring') or die('skip');
+?>
+--INI--
+max_input_nesting_level=5
+max_input_vars=100
+mbstring.encoding_translation=1
+--POST--
+a=1&b[][][]=2&c[][][][][][]=7
+--FILE--
+<?php
+print_r($_POST);
+?>
+--EXPECT--
+Array
+(
+    [a] => 1
+    [b] => Array
+        (
+            [0] => Array
+                (
+                    [0] => Array
+                        (
+                            [0] => 2
+                        )
+
+                )
+
+        )
+
+)