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Fix use after free in VideoSendStreamTest.MinTransmitBitrateRespectsRemb

Browse Source 
https://chromium-swarm.appspot.com/task?id=56dfaf30fa11e510
Due to recent changes, this test sometimes crashes because of
use after free.
Fix this by adding a PendingTaskSafetyFlag to not access `stream_`
after it has been deleted.

Bug: webrtc:13315, webrtc:13351
Change-Id: I7cb180bcab1d79b39737c53704c5fe8a2ca28b7e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/236660
Commit-Queue: Byoungchan Lee <daniel.l@hpcnt.com>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35319}
This commit is contained in:
Byoungchan Lee
2021-10-29 11:00:31 +09:00
committed by WebRTC LUCI CQ
parent 3da2577038
commit 7aa89cedba
1 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
video/video_send_stream_tests.cc
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@ -1470,7 +1470,8 @@ TEST_F(VideoSendStreamTest, MinTransmitBitrateRespectsRemb) {
task_queue_(task_queue),
retranmission_rate_limiter_(Clock::GetRealTimeClock(), 1000),
stream_(nullptr),
bitrate_capped_(false) {}
bitrate_capped_(false),
task_safety_flag_(PendingTaskSafetyFlag::CreateDetached()) {}
~BitrateObserver() override {
// Make sure we free `rtp_rtcp_` in the same context as we constructed it.
@ -1487,7 +1488,7 @@ TEST_F(VideoSendStreamTest, MinTransmitBitrateRespectsRemb) {
const uint32_t ssrc = rtp_packet.Ssrc();
RTC_DCHECK(stream_);
task_queue_->PostTask(ToQueuedTask([this, ssrc]() {
task_queue_->PostTask(ToQueuedTask(task_safety_flag_, [this, ssrc]() {
VideoSendStream::Stats stats = stream_->GetStats();
if (!stats.substreams.empty()) {
EXPECT_EQ(1u, stats.substreams.size());
@ -1532,6 +1533,8 @@ TEST_F(VideoSendStreamTest, MinTransmitBitrateRespectsRemb) {
encoder_config->min_transmit_bitrate_bps = kMinTransmitBitrateBps;
}
void OnStreamsStopped() override { task_safety_flag_->SetNotAlive(); }
void PerformTest() override {
EXPECT_TRUE(Wait())
<< "Timeout while waiting for low bitrate stats after REMB.";
@ -1543,6 +1546,7 @@ TEST_F(VideoSendStreamTest, MinTransmitBitrateRespectsRemb) {
RateLimiter retranmission_rate_limiter_;
VideoSendStream* stream_;
bool bitrate_capped_;
rtc::scoped_refptr<PendingTaskSafetyFlag> task_safety_flag_;
} test(task_queue());
RunBaseTest(&test);