From 7ff3e10d92bac299f541d365057f422d0282e483 Mon Sep 17 00:00:00 2001
From: Isak Westin <isak.westin@loytec.com>
Date: Tue, 4 Oct 2022 10:25:28 +0200
Subject: [PATCH] mesh: Verify padding bits in Friend Poll messages

The padding bits in a Friend Poll message must be zero.
See MshPRFv1.0.1 section 3.6.5.1.
---
 mesh/net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mesh/net.c b/mesh/net.c
index 379a6e250..a8a527c2f 100644
--- a/mesh/net.c
+++ b/mesh/net.c
@@ -2059,7 +2059,7 @@ static bool ctl_received(struct mesh_net *net, uint32_t net_key_id,
 		break;
 
 	case NET_OP_FRND_POLL:
-		if (len != 1 || ttl)
+		if (len != 1 || ttl || pkt[0] > 1)
 			return false;
 
 		print_packet("Rx-NET_OP_FRND_POLL", pkt, len);
-- 
2.47.3