Ensure pvt is not NULL before dereferencing it.

(closes issue #14784)
 Reported by: pj

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@187674 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 34e00ff..8b6aef7 100644 (file)
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -5803,7 +5803,7 @@ static int sip_hangup(struct ast_channel *ast)
                                if (bridge) {
                                        struct sip_pvt *q = bridge->tech_pvt;
 
-                                       if (IS_SIP_TECH(bridge->tech) && q) {
+                                       if (IS_SIP_TECH(bridge->tech) && q && q->rtp) {
                                                ast_rtp_instance_set_stats_vars(bridge, q->rtp);
                                        }
                                }
@@ -20656,7 +20656,7 @@ static int handle_request_bye(struct sip_pvt *p, struct sip_request *req)
                if (bridge) {
                        struct sip_pvt *q = bridge->tech_pvt;
 
-                       if (IS_SIP_TECH(bridge->tech) && q->rtp) {
+                       if (IS_SIP_TECH(bridge->tech) && q && q->rtp) {
                                ast_rtp_instance_set_stats_vars(bridge, q->rtp);
                        }
                }