From e292e044800611eb3f27a17193af6a3ec66fdd83 Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Mon, 28 Nov 2016 19:09:03 +0100
Subject: [PATCH] pua_dialoginfo: safety check of paramters for
 __dialog_sendpublish()

- reported by Davy Van De Moere, GH #865

(cherry picked from commit 1d1d2246c8f89aa6eda52bda479014be0a10b937)
---
 modules/pua_dialoginfo/pua_dialoginfo.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/modules/pua_dialoginfo/pua_dialoginfo.c b/modules/pua_dialoginfo/pua_dialoginfo.c
index 2e050d38b5b..085d2654dea 100644
--- a/modules/pua_dialoginfo/pua_dialoginfo.c
+++ b/modules/pua_dialoginfo/pua_dialoginfo.c
@@ -254,10 +254,15 @@ __dialog_sendpublish(struct dlg_cell *dlg, int type, struct dlg_cb_params *_para
 	str tag = {0,0};
 	str uri = {0,0};
 	str target = {0,0};
+	struct dlginfo_cell *dlginfo = NULL;
 
+	dlginfo = (struct dlginfo_cell*)*_params->param;
 
-	struct dlginfo_cell *dlginfo = (struct dlginfo_cell*)*_params->param;
-
+	if(dlg==NULL || dlginfo==NULL) {
+		LM_WARN("execution with null parameters - type %d, dlg %p, info %p\n",
+				type, dlg, dlginfo);
+		return;
+	}
 	if(include_req_uri) {
 		uri = dlginfo->req_uri;
 	} else {