From 1c14d4b39c572bda858c560e601d9313e6898ae4 Mon Sep 17 00:00:00 2001
From: Alexandra Sandulescu <asa@zurich.ibm.com>
Date: Mon, 18 May 2020 16:57:33 +0200
Subject: [PATCH] gen_packets: fix crash in send_packet

** due to improper sanitization of ax25_from_text result, ax25_pack crashes when pp is NULL
---
 gen_packets.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gen_packets.c b/gen_packets.c
index 62133a9c..45d35528 100644
--- a/gen_packets.c
+++ b/gen_packets.c
@@ -116,6 +116,12 @@ static void send_packet (char *str)
 	}
 	else {
 	  pp = ax25_from_text (str, 1);
+	  if (pp == NULL) {
+	    text_color_set(DW_COLOR_ERROR);
+	    dw_printf ("Failed to create frame from text.\n");
+	    return;
+	  }
+
 	  flen = ax25_pack (pp, fbuf);
 	  for (c=0; c<modem.adev[0].num_channels; c++)
 	  {