From 6460dd9e034bf74b882f9f0e02a46ba1282a4d7e Mon Sep 17 00:00:00 2001
From: The3D <frangellaemilio@gmail.com>
Date: Tue, 10 Nov 2020 17:21:59 +0100
Subject: [PATCH] fixes #133

---
 contracts/libraries/configuration/UserConfiguration.sol | 6 ++++++
 contracts/libraries/helpers/Errors.sol                  | 1 +
 2 files changed, 7 insertions(+)

diff --git a/contracts/libraries/configuration/UserConfiguration.sol b/contracts/libraries/configuration/UserConfiguration.sol
index 71c28f0e..8679390e 100644
--- a/contracts/libraries/configuration/UserConfiguration.sol
+++ b/contracts/libraries/configuration/UserConfiguration.sol
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: agpl-3.0
 pragma solidity ^0.6.8;
 
+import {Errors} from '../helpers/Errors.sol';
 /**
  * @title UserConfiguration library
  * @author Aave
@@ -24,6 +25,7 @@ library UserConfiguration {
     uint256 reserveIndex,
     bool borrowing
   ) internal {
+    require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
     self.data =
       (self.data & ~(1 << (reserveIndex * 2))) |
       (uint256(borrowing ? 1 : 0) << (reserveIndex * 2));
@@ -40,6 +42,7 @@ library UserConfiguration {
     uint256 reserveIndex,
     bool _usingAsCollateral
   ) internal {
+    require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
     self.data =
       (self.data & ~(1 << (reserveIndex * 2 + 1))) |
       (uint256(_usingAsCollateral ? 1 : 0) << (reserveIndex * 2 + 1));
@@ -56,6 +59,7 @@ library UserConfiguration {
     pure
     returns (bool)
   {
+    require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
     return (self.data >> (reserveIndex * 2)) & 3 != 0;
   }
 
@@ -70,6 +74,7 @@ library UserConfiguration {
     pure
     returns (bool)
   {
+    require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
     return (self.data >> (reserveIndex * 2)) & 1 != 0;
   }
 
@@ -84,6 +89,7 @@ library UserConfiguration {
     pure
     returns (bool)
   {
+    require(reserveIndex < 128, Errors.UL_INVALID_INDEX);
     return (self.data >> (reserveIndex * 2 + 1)) & 1 != 0;
   }
 
diff --git a/contracts/libraries/helpers/Errors.sol b/contracts/libraries/helpers/Errors.sol
index 2dff6ced..1aeb88b1 100644
--- a/contracts/libraries/helpers/Errors.sol
+++ b/contracts/libraries/helpers/Errors.sol
@@ -96,6 +96,7 @@ library Errors {
   string public constant LPAPR_INVALID_ADDRESSES_PROVIDER_ID = '72';
   string public constant VL_INCONSISTENT_FLASHLOAN_PARAMS = '73';
   string public constant LP_INCONSISTENT_PARAMS_LENGTH = '74';
+  string public constant UL_INVALID_INDEX = '77';
 
   enum CollateralManagerErrors {
     NO_ERROR,