From 4e828b3bd2d410151dc2574d084bed631dac42ca Mon Sep 17 00:00:00 2001
From: Daniel McArdle <dmcardle@chromium.org>
Date: Thu, 16 Apr 2020 20:18:47 +0000
Subject: [PATCH] [Backport] Fix for bug 1071327

Manual backport of patch originally reviewed on
https://chromium-review.googlesource.com/c/chromium/src/+/2153325:
Avoid nullptr dereference in RTCPeerConnectionHandler

Bug: 1071327
Fixes: QTBUG-86752
Change-Id: Icf4189905dc5c95854b5af4b3e5e25e0607dd39e
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
---

diff --git a/chromium/third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc b/chromium/third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc
index 5a68327..371f25c 100644
--- a/chromium/third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc
+++ b/chromium/third_party/blink/renderer/modules/peerconnection/rtc_peer_connection_handler.cc
@@ -2319,7 +2319,8 @@
 
 void RTCPeerConnectionHandler::OnModifySctpTransport(
     blink::WebRTCSctpTransportSnapshot state) {
-  client_->DidModifySctpTransport(state);
+  if (client_)
+    client_->DidModifySctpTransport(state);
 }
 
 void RTCPeerConnectionHandler::OnModifyTransceivers(
@@ -2446,7 +2447,8 @@
 }
 
 void RTCPeerConnectionHandler::OnInterestingUsage(int usage_pattern) {
-  client_->DidNoteInterestingUsage(usage_pattern);
+  if (client_)
+    client_->DidNoteInterestingUsage(usage_pattern);
 }
 
 webrtc::SessionDescriptionInterface*