From 9e331e7977f98e7e007e1bc3e8951413a7e0ec70 Mon Sep 17 00:00:00 2001
From: Chenchen <cgjdemo@foxmail.com>
Date: Fri, 11 Jun 2021 05:49:29 +0800
Subject: [PATCH] fix invalid memory access when eol size >1 (#220)

Co-authored-by: chenguojun <chenguojun@yogorobot.com>
---
 src/serial.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/serial.cc b/src/serial.cc
index 37b5d70..a9e6f84 100755
--- a/src/serial.cc
+++ b/src/serial.cc
@@ -188,6 +188,7 @@ Serial::readline (string &buffer, size_t size, string eol)
     if (bytes_read == 0) {
       break; // Timeout occured on reading 1 byte
     }
+    if(read_so_far < eol_len) continue;
     if (string (reinterpret_cast<const char*>
          (buffer_ + read_so_far - eol_len), eol_len) == eol) {
       break; // EOL found
@@ -229,6 +230,7 @@ Serial::readlines (size_t size, string eol)
       }
       break; // Timeout occured on reading 1 byte
     }
+    if(read_so_far < eol_len) continue;
     if (string (reinterpret_cast<const char*>
          (buffer_ + read_so_far - eol_len), eol_len) == eol) {
       // EOL found