# HG changeset patch
# User Matt Johnston <matt@ucc.asn.au>
# Date 1520344939 -28800
# Node ID 8f7b6f75aa584d1e2c89017779c36ec52d108741
# Parent  60fceff958581d84453883057f74e1bfd23b28f4
fix uninitialised memory in fuzzer codepath

diff -r 60fceff95858 -r 8f7b6f75aa58 packet.c
--- a/packet.c	Tue Mar 06 21:51:51 2018 +0800
+++ b/packet.c	Tue Mar 06 22:02:19 2018 +0800
@@ -364,9 +364,11 @@
 
 #if DROPBEAR_FUZZ
 	if (fuzz.fuzzing) {
-		/* 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);
+	 	/* fail 1 in 2000 times to test error path. */
+		unsigned int value = 0;
+		if (mac_size > sizeof(value)) {
+			memcpy(&value, mac_bytes, sizeof(value));
+		}
 		if (value % 2000 == 99) {
 			return DROPBEAR_FAILURE;
 		}