From 2d745fabe357002284d619d11d3ce106380a7307 Mon Sep 17 00:00:00 2001
From: John Blackbourn <johnbillion@git.wordpress.org>
Date: Wed, 7 Oct 2015 14:30:25 +0000
Subject: [PATCH] Prevent a PHP notice from appearing on
 `wp-login.php?action=postpass` when there's no `$_POST['post_password']`
 parameter. Redirects to the referer if there is one (if there isn't one it'll
 just exit with a blank screen; no need for a user-friendly error message
 here).

Fixes #34160
Props iamfriendly

Built from https://develop.svn.wordpress.org/trunk@34909


git-svn-id: http://core.svn.wordpress.org/trunk@34874 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/version.php | 2 +-
 wp-login.php            | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/wp-includes/version.php b/wp-includes/version.php
index 1ea756f11c..39f9be0c72 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34908';
+$wp_version = '4.4-alpha-34909';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-login.php b/wp-login.php
index 8f676d7d8a..350363dabe 100644
--- a/wp-login.php
+++ b/wp-login.php
@@ -472,6 +472,11 @@ $interim_login = isset($_REQUEST['interim-login']);
 switch ($action) {
 
 case 'postpass' :
+	if ( ! array_key_exists( 'post_password', $_POST ) ) {
+		wp_safe_redirect( wp_get_referer() );
+		exit();
+	}
+
 	require_once ABSPATH . WPINC . '/class-phpass.php';
 	$hasher = new PasswordHash( 8, true );