From ea813698ae78bc0460e2fe978124c654b44125a1 Mon Sep 17 00:00:00 2001
From: bemasher <bemasher@gmail.com>
Date: Wed, 29 Oct 2014 14:28:00 -0600
Subject: [PATCH] Add new error case for SCM parsing.

Will error if packet is too short.
Adds slice upper bound for checksum.
---
 scm/scm.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/scm/scm.go b/scm/scm.go
index 2ea5a39be..298739c3d 100644
--- a/scm/scm.go
+++ b/scm/scm.go
@@ -62,7 +62,11 @@ func NewParser() (p Parser) {
 func (p Parser) Parse(data parse.Data) (msg parse.Message, err error) {
 	var scm SCM
 
-	if p.Checksum(data.Bytes[2:]) != 0 {
+	if l := len(data.Bytes); l < 12 {
+		err = fmt.Errorf("packet too short: %d", l)
+		return
+	}
+	if p.Checksum(data.Bytes[2:12]) != 0 {
 		err = errors.New("checksum failed")
 		return
 	}