From 9c99fac36439828a435afb9aa53ab5e78926d4de Mon Sep 17 00:00:00 2001
From: Bill Somerville <g4wjs@classdesign.com>
Date: Fri, 19 Jan 2018 13:54:05 +0000
Subject: [PATCH] Fix a buffer overrun in the FT8 message generator

Thanks to Ian, KD8CEC, for diagnosing and contributing a patch for
this defect.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8422 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
---
 mainwindow.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mainwindow.cpp b/mainwindow.cpp
index b72f30b98..674ee2c5f 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -141,7 +141,6 @@ extern "C" {
 }
 
 int volatile itone[NUM_ISCAT_SYMBOLS];  //Audio tones for all Tx symbols
-char volatile ft8msgbits[75];           //packed 75 bit ft8 message
 int volatile icw[NUM_CW_SYMBOLS];       //Dits for CW ID
 struct dec_data dec_data;               // for sharing with Fortran
 
@@ -3377,6 +3376,7 @@ void MainWindow::guiUpdate()
               foxTxSequencer();
             } else {
               m_i3bit=0;
+              char ft8msgbits[75 + 12]; //packed 75 bit ft8 message plus 12-bit CRC
               genft8_(message, MyGrid, &bcontest, &m_i3bit, msgsent, const_cast<char *> (ft8msgbits),
                       const_cast<int *> (itone), 22, 6, 22);
             }