From 91e09338ea7dc8ba2e20abdeae7dcf79c8320dcd Mon Sep 17 00:00:00 2001
From: murata <ma2maru@gmail.com>
Date: Thu, 26 Dec 2019 08:00:15 +0900
Subject: [PATCH] GCS_MAVLInk: Judgment of non-existence value by PARAM_SET

---
 libraries/GCS_MAVLink/GCS_Param.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/GCS_MAVLink/GCS_Param.cpp b/libraries/GCS_MAVLink/GCS_Param.cpp
index 59d354107e..397737dc15 100644
--- a/libraries/GCS_MAVLink/GCS_Param.cpp
+++ b/libraries/GCS_MAVLink/GCS_Param.cpp
@@ -268,7 +268,7 @@ void GCS_MAVLINK::handle_param_set(const mavlink_message_t &msg)
     // find existing param so we can get the old value
     uint16_t parameter_flags = 0;
     vp = AP_Param::find(key, &var_type, &parameter_flags);
-    if (vp == nullptr) {
+    if (vp == nullptr || isnan(packet.param_value) || isinf(packet.param_value)) {
         return;
     }