From 9d19712401f6ef2d6e6c2cce66d6d0ffce321fbe Mon Sep 17 00:00:00 2001
From: sucre <405462135@qq.com>
Date: Fri, 10 Dec 2021 19:29:43 +0800
Subject: [PATCH] Update service.go

fix out of range  bug
---
 pkg/common/service.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pkg/common/service.go b/pkg/common/service.go
index b1ebe0a..c27d090 100644
--- a/pkg/common/service.go
+++ b/pkg/common/service.go
@@ -46,8 +46,11 @@ func ComparePackets(rcv []byte, rcvSize int, szBan *string, szSvcName *string) i
 
 	var cFlag_MongoDB = []byte{0x4d, 0x09, 0x50, 0x00}
 	var cBit_MongoDB []byte
-
-
+	
+	if len(buf) <4 {
+		goto Return
+	}
+	
 	if rcvSize <4{
 		goto Return
 	}