From 480bfbd0217ce349d6c129ec35c058f8b9b6cdb4 Mon Sep 17 00:00:00 2001
From: "James N. V. Cash" <james.nvc@gmail.com>
Date: Fri, 27 Oct 2017 17:28:32 -0400
Subject: [PATCH] Guard against out-of-bounds layer

---
 src/Kaleidoscope/EEPROM-Keymap.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Kaleidoscope/EEPROM-Keymap.cpp b/src/Kaleidoscope/EEPROM-Keymap.cpp
index 7d83e792..0d2b00c6 100644
--- a/src/Kaleidoscope/EEPROM-Keymap.cpp
+++ b/src/Kaleidoscope/EEPROM-Keymap.cpp
@@ -113,6 +113,9 @@ bool EEPROMKeymap::focusKeymapLayer(const char *command) {
   }
 
   uint8_t layer = Serial.parseInt();
+  if (layer >= max_layers_) {
+    return false;
+  }
   uint16_t keysPerLayer = ROWS * COLS;
   uint16_t offset = layer * keysPerLayer;
   if (Serial.peek() == '\n') {