From 0558066261625d0f4e7d5c118a0efd4238d24715 Mon Sep 17 00:00:00 2001
From: Sergey Elantsev <elantsev.s@yandex.ru>
Date: Sun, 20 Dec 2020 18:13:10 +0300
Subject: fixed possible crashes on parsing of bgp messages

---
 pkg/packet/bgp/prefix_sid.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'pkg/packet/bgp/prefix_sid.go')

diff --git a/pkg/packet/bgp/prefix_sid.go b/pkg/packet/bgp/prefix_sid.go
index a7983bcd..32f575ee 100644
--- a/pkg/packet/bgp/prefix_sid.go
+++ b/pkg/packet/bgp/prefix_sid.go
@@ -52,7 +52,7 @@ func (s *TLV) DecodeFromBytes(data []byte) ([]byte, error) {
 	p++
 	s.Length = binary.BigEndian.Uint16(data[p : p+2])
 
-	if len(data) < s.Len() {
+	if s.Len() < prefixSIDtlvHdrLen || len(data) < s.Len() {
 		return nil, malformedAttrListErr("decoding failed: Prefix SID TLV malformed")
 	}
 
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