From 723ec19eedd2618cd850e703519fd8432c67e44c Mon Sep 17 00:00:00 2001
From: Matt Johnston <matt@ucc.asn.au>
Date: Sun, 11 Jun 2017 21:39:40 +0800
Subject: [PATCH] fix checkmac always failing pre-kex

--HG--
branch : fuzz
---
 packet.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/packet.c b/packet.c
index a02cb1b..63c813b 100644
--- a/packet.c
+++ b/packet.c
@@ -372,9 +372,10 @@ static int checkmac() {
 
 #ifdef DROPBEAR_FUZZ
 	if (fuzz.fuzzing) {
-		// fail 1 in 1000 times to test error path
+		// fail 1 in 2000 times to test error path.
+		// note that mac_bytes is all zero prior to kex, so don't test ==0 !
 		unsigned int value = *((unsigned int*)&mac_bytes);
-		if (value % 1000 == 0) {
+		if (value % 2000 == 99) {
 			return DROPBEAR_FAILURE;
 		}
 		return DROPBEAR_SUCCESS;