From 69c36cde2df592701a0346a88e9716ade464229c Mon Sep 17 00:00:00 2001
From: Derek Wang <whynowy@gmail.com>
Date: Thu, 22 Apr 2021 15:44:56 -0700
Subject: [PATCH] fix: Fast fail invalid SNS notification. Fixes: #1182 (#1185)

Signed-off-by: Derek Wang <whynowy@gmail.com>
---
 eventsources/sources/awssns/start.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/eventsources/sources/awssns/start.go b/eventsources/sources/awssns/start.go
index a2a745a02b..5dcadb9aca 100644
--- a/eventsources/sources/awssns/start.go
+++ b/eventsources/sources/awssns/start.go
@@ -130,6 +130,11 @@ func (router *Router) HandleRoute(writer http.ResponseWriter, request *http.Requ
 		return
 	}
 
+	if notification == nil {
+		common.SendErrorResponse(writer, "bad request, not a valid SNS notification")
+		return
+	}
+
 	// SNS Signature Verification
 	if router.eventSource.ValidateSignature {
 		err = notification.verify()