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Issue #1558 - Prevent null deref crash in WebrtcVideoConduit DTOR

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Fedor 2020-05-27 09:01:53 +03:00 • committed by Roy Tam
commit 086a028a16
1 changed files with 7 additions and 0 deletions
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7
media/webrtc/signaling/src/media-conduit/VideoConduit.cpp
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@ -521,6 +521,8 @@ WebrtcVideoConduit::DeleteStreams()
mVideoCodecStat->EndOfCallStats();
}
mVideoCodecStat = nullptr;
//This does Release AudioConduit before mPtrViEBase set nullptr.
SyncTo(nullptr);
// We can't delete the VideoEngine until all these are released!
// And we can't use a Scoped ptr, since the order is arbitrary
mPtrViEBase = nullptr;
@ -543,6 +545,11 @@ WebrtcVideoConduit::SyncTo(WebrtcAudioConduit *aConduit)
{
CSFLogDebug(logTag, "%s Synced to %p", __FUNCTION__, aConduit);
if (!mPtrViEBase) {
// ViEBase has already been released; we no longer have a conduit.
mSyncedTo = nullptr;
return;
}
// SyncTo(value) syncs to the AudioConduit, and if already synced replaces
// the current sync target. SyncTo(nullptr) cancels any existing sync and
// releases the strong ref to AudioConduit.