From acc8dafdf20296d6cc5616e26a082ed462f4c851 Mon Sep 17 00:00:00 2001
From: tsteven4 <tsteven4@gmail.com>
Date: Wed, 8 Nov 2017 06:39:32 -0700
Subject: [PATCH] fix potential buffer overflow in lowranceusr4 reader.

---
 lowranceusr4.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lowranceusr4.cc b/lowranceusr4.cc
index f2470453e..53436d8be 100644
--- a/lowranceusr4.cc
+++ b/lowranceusr4.cc
@@ -85,8 +85,8 @@ lowranceusr4_readstr(char* buf, const int maxlen, gbfile* file, int bytes_per_ch
     buf[0] = '\0'; /* seems len=-1 means no string */
     return 0;
   } else if (len) {
-    if (len > maxlen*bytes_per_char) {
-      len = maxlen*bytes_per_char;
+    if (len > maxlen) {
+      len = maxlen;
     }
     if (bytes_per_char == 1) {
       bytesread += gbfread(buf, 1, len, file);
-- 
2.30.2