5.0-bugteam->5.1-bugteam merge

mysql-test/r/grant.result

@@ -1246,6 +1246,11 @@ drop user 'greg'@'localhost';
 drop view v1;
 drop table test;
 drop function test_function;
+SELECT CURRENT_USER();
+CURRENT_USER()
+root@localhost
+SET PASSWORD FOR CURRENT_USER() = PASSWORD("admin");
+SET PASSWORD FOR CURRENT_USER() = PASSWORD("");
 End of 5.0 tests
 set names utf8;
 grant select on test.* to юзер_юзер@localhost;

mysql-test/t/grant.test

@@ -1294,6 +1294,13 @@ drop view v1;
 drop table test;
 drop function test_function;
 
+#
+# Bug#41456 SET PASSWORD hates CURRENT_USER()
+#
+SELECT CURRENT_USER();
+SET PASSWORD FOR CURRENT_USER() = PASSWORD("admin");
+SET PASSWORD FOR CURRENT_USER() = PASSWORD("");
+
 --echo End of 5.0 tests
 
 #

sql/set_var.cc

@@ -3548,6 +3548,7 @@ int set_var_password::check(THD *thd)
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
   if (!user->host.str)
   {
+    DBUG_ASSERT(thd->security_ctx->priv_host);
     if (*thd->security_ctx->priv_host != 0)
     {
       user->host.str= (char *) thd->security_ctx->priv_host;
@@ -3559,6 +3560,12 @@ int set_var_password::check(THD *thd)
       user->host.length= 1;
     }
   }
+  if (!user->user.str)
+  {
+    DBUG_ASSERT(thd->security_ctx->priv_user);
+    user->user.str= (char *) thd->security_ctx->priv_user;
+    user->user.length= strlen(thd->security_ctx->priv_user);
+  }
   /* Returns 1 as the function sends error to client */
   return check_change_password(thd, user->host.str, user->user.str,
                                password, strlen(password)) ? 1 : 0;