- Patch #1204658 by kbasarab, Berdir, tim.plunkett, webchick: remove node access base table fallback.

core/modules/comment/comment.module

@@ -528,6 +528,7 @@ function comment_get_recent($number = 10) {
   $query = db_select('comment', 'c');
   $query->innerJoin('node', 'n', 'n.nid = c.nid');
   $query->addTag('node_access');
+  $query->addMetaData('base_table', 'comment');
   $comments = $query
     ->fields('c')
     ->condition('c.status', COMMENT_PUBLISHED)
@@ -860,6 +861,7 @@ function comment_get_thread(Node $node, $mode, $comments_per_page) {
     ->condition('c.nid', $node->nid)
     ->addTag('node_access')
     ->addTag('comment_filter')
+    ->addMetaData('base_table', 'comment')
     ->addMetaData('node', $node)
     ->limit($comments_per_page);
 
@@ -869,6 +871,7 @@ function comment_get_thread(Node $node, $mode, $comments_per_page) {
     ->condition('c.nid', $node->nid)
     ->addTag('node_access')
     ->addTag('comment_filter')
+    ->addMetaData('base_table', 'comment')
     ->addMetaData('node', $node);
 
   if (!user_access('administer comments')) {

core/modules/forum/forum.module

@@ -679,7 +679,8 @@ function forum_block_save($delta = '', $edit = array()) {
 function forum_block_view($delta = '') {
   $query = db_select('forum_index', 'f')
     ->fields('f')
-    ->addTag('node_access');
+    ->addTag('node_access')
+    ->addMetaData('base_table', 'forum_index');
   switch ($delta) {
     case 'active':
       $title = t('Active forum topics');
@@ -928,6 +929,7 @@ function forum_get_topics($tid, $sortby, $forum_per_page) {
   $query
     ->condition('f.tid', $tid)
     ->addTag('node_access')
+    ->addMetaData('base_table', 'forum_index')
     ->orderBy('f.sticky', 'DESC')
     ->orderByHeader($forum_topic_list_header)
     ->limit($forum_per_page);
@@ -936,6 +938,7 @@ function forum_get_topics($tid, $sortby, $forum_per_page) {
   $count_query->condition('f.tid', $tid);
   $count_query->addExpression('COUNT(*)');
   $count_query->addTag('node_access');
+  $count_query->addMetaData('base_table', 'forum_index');
 
   $query->setCountQuery($count_query);
   $result = $query->execute();

core/modules/node/node.module

@@ -3258,10 +3258,9 @@ function _node_query_node_access_alter($query, $type) {
 
   $tables = $query->getTables();
   $base_table = $query->getMetaData('base_table');
-  // If no base table is specified explicitly, search for one.
+  // If the base table is not given, default to node if present.
   if (!$base_table) {
-    $fallback = '';
+    foreach ($tables as $table_info) {
-    foreach ($tables as $alias => $table_info) {
       if (!($table_info instanceof SelectInterface)) {
         $table = $table_info['table'];
         // If the node table is in the query, it wins immediately.
@@ -3269,38 +3268,11 @@ function _node_query_node_access_alter($query, $type) {
           $base_table = $table;
           break;
         }
-        // Check whether the table has a foreign key to node.nid. If it does,
-        // do not run this check again as we found a base table and only node
-        // can triumph that.
-        if (!$base_table) {
-          // The schema is cached.
-          $schema = drupal_get_schema($table);
-          if (isset($schema['fields']['nid'])) {
-            if (isset($schema['foreign keys'])) {
-              foreach ($schema['foreign keys'] as $relation) {
-                if ($relation['table'] === 'node' && $relation['columns'] === array('nid' => 'nid')) {
-                  $base_table = $table;
-                }
-              }
-            }
-            else {
-              // At least it's a nid. A table with a field called nid is very
-              // very likely to be a node.nid in a node access query.
-              $fallback = $table;
-            }
-          }
-        }
       }
     }
-    // If there is nothing else, use the fallback.
+    // Bail out if the base table is missing.
     if (!$base_table) {
-      if ($fallback) {
+      throw new Exception(t('Query tagged for node access but there is no node table, specify the base_table using meta data.'));
-        watchdog('security', 'Your node listing query is using @fallback as a base table in a query tagged for node access. This might not be secure and might not even work. Specify foreign keys in your schema to node.nid ', array('@fallback' => $fallback), WATCHDOG_WARNING);
-        $base_table = $fallback;
-      }
-      else {
-        throw new Exception(t('Query tagged for node access but there is no nid. Add foreign keys to node.nid in schema to fix.'));
-      }
     }
   }
 

core/modules/taxonomy/taxonomy.module

@@ -228,6 +228,7 @@ function taxonomy_select_nodes($tid, $pager = TRUE, $limit = FALSE, $order = arr
   }
   $query = db_select('taxonomy_index', 't');
   $query->addTag('node_access');
+  $query->addMetaData('base_table', 'taxonomy_index');
   $query->condition('tid', $tid);
   if ($pager) {
     $count_query = clone $query;

core/modules/tracker/tracker.pages.inc

@@ -39,6 +39,7 @@ function tracker_page($account = NULL, $set_title = FALSE) {
   // while keeping the correct order.
   $nodes = $query
     ->addTag('node_access')
+    ->addMetaData('base_table', 'tracker_node')
     ->fields('t', array('nid', 'changed'))
     ->condition('t.published', 1)
     ->orderBy('t.changed', 'DESC')