From f6d725077240339d3bdfd3719e736a1bcb2b176f Mon Sep 17 00:00:00 2001
From: Manuel Reimer <manuel.reimer@gmx.de>
Date: Sun, 18 Mar 2018 11:35:54 +0100
Subject: st7565r-reel: Prevent possible segfault

---
 glcddrivers/st7565r-reel.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'glcddrivers/st7565r-reel.c')

diff --git a/glcddrivers/st7565r-reel.c b/glcddrivers/st7565r-reel.c
index 29b6a39..0f13486 100644
--- a/glcddrivers/st7565r-reel.c
+++ b/glcddrivers/st7565r-reel.c
@@ -265,6 +265,11 @@ void cDriverST7565RReel::display_cmd(unsigned char cmd)
 
 void cDriverST7565RReel::display_data(unsigned char *data, unsigned char l)
 {
+    if (l > 60)
+    {
+        syslog(LOG_ERR, "cDriverST7565RReel::display_data buffer length exceeded!");
+    }
+
     unsigned char buf[64]={0xa5,0x05,(unsigned char)(l+2),+1};
     memcpy(buf+4,data,l);
     port->WriteData(buf, l+4);
-- 
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