1 files changed, 53 insertions, 0 deletions
diff --git a/third_party/libwebrtc/moz-patch-stack/0063.patch b/third_party/libwebrtc/moz-patch-stack/0063.patch
new file mode 100644
index 0000000000..a61bf11937
--- /dev/null
+++ b/third_party/libwebrtc/moz-patch-stack/0063.patch
@@ -0,0 +1,53 @@
+From: Andreas Pehrson <apehrson@mozilla.com>
+Date: Mon, 5 Sep 2022 13:56:00 +0000
+Subject: Bug 1786502 - Lock access to DeviceInfo devicechange callbacks.
+ r=webrtc-reviewers,jib
+
+Differential Revision: https://phabricator.services.mozilla.com/D155365
+Mercurial Revision: https://hg.mozilla.org/mozilla-central/rev/e826dfadfe1264c59d9b13e3c17d6f75a40f5c33
+---
+ modules/video_capture/video_capture.h | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/modules/video_capture/video_capture.h b/modules/video_capture/video_capture.h
+index 58485f28e9..04203033b0 100644
+--- a/modules/video_capture/video_capture.h
++++ b/modules/video_capture/video_capture.h
+@@ -16,6 +16,8 @@
+ #include "modules/desktop_capture/desktop_capture_types.h"
+ #include "modules/video_capture/raw_video_sink_interface.h"
+ #include "modules/video_capture/video_capture_defines.h"
++#include "rtc_base/synchronization/mutex.h"
++#include "rtc_base/thread_annotations.h"
+ #include <set>
+ 
+ #if defined(ANDROID)
+@@ -40,15 +42,18 @@ class VideoCaptureModule : public rtc::RefCountInterface {
+     virtual uint32_t NumberOfDevices() = 0;
+     virtual int32_t Refresh() = 0;
+     virtual void DeviceChange() {
++      MutexLock lock(&_inputCallbacksMutex);
+       for (auto inputCallBack : _inputCallBacks) {
+         inputCallBack->OnDeviceChange();
+       }
+     }
+     virtual void RegisterVideoInputFeedBack(VideoInputFeedBack* callBack) {
++      MutexLock lock(&_inputCallbacksMutex);
+       _inputCallBacks.insert(callBack);
+     }
+ 
+     virtual void DeRegisterVideoInputFeedBack(VideoInputFeedBack* callBack) {
++      MutexLock lock(&_inputCallbacksMutex);
+       auto it = _inputCallBacks.find(callBack);
+       if (it != _inputCallBacks.end()) {
+         _inputCallBacks.erase(it);
+@@ -102,7 +107,8 @@ class VideoCaptureModule : public rtc::RefCountInterface {
+ 
+     virtual ~DeviceInfo() {}
+    private:
+-    std::set<VideoInputFeedBack*> _inputCallBacks;
++    Mutex _inputCallbacksMutex;
++    std::set<VideoInputFeedBack*> _inputCallBacks RTC_GUARDED_BY(_inputCallbacksMutex);
+   };
+ 
+   //   Register capture data callback