Bug21338077 HANDLE_FATAL_SIGNAL (SIG=11) IN __STPCPY_SSE2_UNALIGNED FROM MY_

PROBLEM: Derived tables with no name caused issues when pre-check
 was performed.
FIX: For derived tables: Skip pre-check and initialize the table privilege
 with a SELECT_ACL grant

Author: Kristofer Pettersson

mysql-test/r/view_grant.result

@@ -2631,6 +2631,16 @@ ERROR HY000: View 'test1.v1_all' references invalid table(s) or column(s) or fun
 SHOW WARNINGS;
 Level	Code	Message
 Error	1356	View 'test1.v1_all' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
+
+# Bug21338077 HANDLE_FATAL_SIGNAL (SIG=11) IN __STPCPY_SSE2_UNALIGNED FROM MY_STPCPY
+
+CREATE VIEW v1 AS SELECT 1 FROM (SELECT 1) AS d1;
+PREPARE stmt FROM 'SELECT * FROM v1';
+EXECUTE stmt;
+1
+1
+DROP PREPARE stmt;
+DROP VIEW v1;
 connection default;
 disconnect con1;
 DROP USER 'user1'@'localhost';

mysql-test/t/view_grant.test

@@ -2951,6 +2951,16 @@ SHOW WARNINGS;
 --error ER_VIEW_INVALID
 UPDATE IGNORE test1.v1_all SET cn='x';
 SHOW WARNINGS;
+
+--echo
+--echo # Bug21338077 HANDLE_FATAL_SIGNAL (SIG=11) IN __STPCPY_SSE2_UNALIGNED FROM MY_STPCPY
+--echo
+CREATE VIEW v1 AS SELECT 1 FROM (SELECT 1) AS d1;
+PREPARE stmt FROM 'SELECT * FROM v1';
+EXECUTE stmt;
+DROP PREPARE stmt;
+DROP VIEW v1;
+
 --connection default
 disconnect con1;
 DROP USER 'user1'@'localhost';

sql/auth/sql_authorization.cc

@@ -3782,6 +3782,11 @@ void fill_effective_table_privileges(THD *thd, GRANT_INFO *grant,
                        sctx->ip().str : "(NULL)"),
                        (priv_user.str ? priv_user.str : "(NULL)"),
                        db, table));
+  /*
+    This function is not intended for derived tables which doesn't have a 
+    name. If this happens something is wrong.
+  */
+  DBUG_ASSERT(table != 0);
   /* --skip-grants */
   if (!initialized)
   {

sql/table.cc

@@ -221,6 +221,15 @@ View_creation_ctx * View_creation_ctx::create(THD *thd,
 
 /*************************************************************************/
 
+GRANT_INFO::GRANT_INFO()
+{
+  grant_table= 0;
+  version= 0;
+  privilege= NO_ACCESS;
+  want_privilege= 0;
+}
+
+
 /* Get column name from column hash */
 
 static uchar *get_field_name(Field **buff, size_t *length,
@@ -5372,11 +5381,17 @@ bool TABLE_LIST::prepare_security(THD *thd)
   {
     DBUG_ASSERT(tbl->referencing_view);
     const char *local_db, *local_table_name;
-    if (tbl->view)
+    if (tbl->is_view())
     {
       local_db= tbl->view_db.str;
       local_table_name= tbl->view_name.str;
     }
+    else if (tbl->is_derived())
+    {
+      /* Initialize privileges for derived tables */
+      tbl->grant.privilege= SELECT_ACL;
+      continue;
+    }
     else
     {
       local_db= tbl->db;

sql/table.h

@@ -269,6 +269,7 @@ typedef struct st_grant_internal_info GRANT_INTERNAL_INFO;
  */
 struct GRANT_INFO
 {
+  GRANT_INFO();
   /**
      @brief A copy of the privilege information regarding the current host,
      database, object and user.