From 89afd897414631273ec0a1bd532a68746594bc9b Mon Sep 17 00:00:00 2001
From: Anthony Minessale <anthm@freeswitch.org>
Date: Mon, 29 Apr 2013 09:19:47 -0500
Subject: [PATCH] FS-5286 we can try this for added protection

---
 src/mod/applications/mod_spandsp/mod_spandsp_fax.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mod/applications/mod_spandsp/mod_spandsp_fax.c b/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
index 8504fda1d5..0ff57ccc02 100644
--- a/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
+++ b/src/mod/applications/mod_spandsp/mod_spandsp_fax.c
@@ -1484,7 +1484,7 @@ void mod_spandsp_fax_process_fax(switch_core_session_t *session, const char *dat
 					continue;
 				}
 	
-				if (switch_test_flag(read_frame, SFF_UDPTL_PACKET)) {
+				if (switch_test_flag(read_frame, SFF_UDPTL_PACKET) && read_frame->packet && read_frame->packetlen) {
 					/* now we know we can cast frame->packet to a udptl structure */
 					//switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "READ %d udptl bytes\n", read_frame->packetlen);