From 5f6eee66ff561845b3c8841021d5f4cd70f2e0d0 Mon Sep 17 00:00:00 2001
From: George Oikonomou <george@contiki-ng.org>
Date: Fri, 16 Feb 2018 15:04:02 +0000
Subject: [PATCH] Correctly check against minumum RX frame length

---
 arch/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c b/arch/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c
index cf1676570..3be828722 100644
--- a/arch/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c
+++ b/arch/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c
@@ -1079,17 +1079,17 @@ read_frame(void *buf, unsigned short buf_len)
     return 0;
   }
 
-  if(rx_read_entry[8] < 4) {
-    PRINTF("RF: too short\n");
+  len = rx_read_entry[8] - 8;
+
+  if(len > buf_len) {
+    PRINTF("RF: too long\n");
 
     release_data_entry();
     return 0;
   }
 
-  len = rx_read_entry[8] - 8;
-
-  if(len > buf_len) {
-    PRINTF("RF: too long\n");
+  if(len < 5) {
+    PRINTF("RF: too short\n");
 
     release_data_entry();
     return 0;