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Live: Crash for invalid live stream state when unmount HTTP. v6.0.146 (#4141)

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When unpublishing, the handler callback that will stop the coroutine:

```cpp
_can_publish = true;
handler->on_unpublish(req);
```

In this handler, the `http_unmount` will be called:

```cpp
void SrsHttpStreamServer::http_unmount(SrsRequest* r)
    cache->stop();
```

In this `http_unmount` function, there could be context switching. In
such a situation, a new connection might publish the stream while the
unpublish process is freeing the stream, leading to a crash.

To prevent a new publisher, we should change the state only after all
handlers and hooks are completed.

---------

Co-authored-by: liumengte <liumengte@visionular.com>
Co-authored-by: winlin <winlinvip@gmail.com>
This commit is contained in:
Bahamut 2024-08-15 10:41:57 +08:00 • committed by winlin
parent fa3dc3bf69
commit 957140db51
2 changed files with 4 additions and 2 deletions
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5
trunk/src/app/srs_app_source.cpp
View file

@ -2632,8 +2632,7 @@ void SrsLiveSource::on_unpublish()
meta->update_previous_ash();
srs_trace("cleanup when unpublish");
_can_publish = true;
if (!_source_id.empty()) {
_pre_source_id = _source_id;
}
@ -2655,6 +2654,8 @@ void SrsLiveSource::on_unpublish()
if (consumers.empty()) {
stream_die_at_ = srs_get_system_time();
}
_can_publish = true;
}
srs_error_t SrsLiveSource::create_consumer(SrsLiveConsumer*& consumer)