From 34de7bc267984340d0c6c0afcbb1069af2f81e6d Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Sat, 23 Jun 2018 15:43:31 +0100
Subject: [PATCH] device_ledger: fix buffer underflow on bad data from device

---
 src/device/device_ledger.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/device/device_ledger.cpp b/src/device/device_ledger.cpp
index 8735baeb6..bc7f37789 100644
--- a/src/device/device_ledger.cpp
+++ b/src/device/device_ledger.cpp
@@ -304,6 +304,7 @@ namespace hw {
                          SCARD_PCI_T0, this->buffer_send, this->length_send,
                          NULL,         this->buffer_recv, &this->length_recv);
       ASSERT_RV(rv);
+      ASSERT_T0(this->length_recv >= 2);
       ASSERT_T0(this->length_recv <= BUFFER_RECV_SIZE);
       logRESP();