Unhandled exception thrown by Boost.Asio

[glassez]

There are many crash reports in qBittorrent bug tracker that point to unhandled exception thrown in boost::asio::detail::socket_select_interrupter::open_descriptors. IIRC, exception is often thrown once some VPN service is enabled during qBittorrent run.

[glassez]

Yet another related crash report, but qBittorrent is crashed after hibernation: https://github.com/qbittorrent/qBittorrent/issues/18823.

[xavier2k6]

@arvidn Going over chriskohlhoff/asio#1061 (comment) & chriskohlhoff/asio#1061 (comment) - I don't know if this is related/relevant but the only place left in libtorrent code that wasn't changed from async_receive to async_receive_from was in ip_notifier.cpp

https://github.com/arvidn/libtorrent/blob/6d64ac1dadb17df1c5719eb66179ac47e95eba12/src/ip_notifier.cpp#L155 &

https://github.com/arvidn/libtorrent/blob/6d64ac1dadb17df1c5719eb66179ac47e95eba12/src/ip_notifier.cpp#L218

What if there's a socket failure/error not properly being handled??

[xavier2k6]

@arvidn Reproducible steps in https://github.com/qbittorrent/qBittorrent/issues/18811#issuecomment-1501165433

[xavier2k6]

@arvidn Ping

[xavier2k6]

I see you're prepping 2.0.9 / 1.2.19 for release, would a fix for this issue make it in to these versions by any chance?

[arvidn]

I don't believe there is a fix

[arvidn]

I don't know if this is related/relevant but the only place left in libtorrent code that wasn't changed from async_receive to async_receive_from was in ip_notifier.cpp

Chris' comment was about using null_buffers instead of allocating the receive buffer up-front. In more recent versions of asio, null_buffers have been replaced by async_wait() on sockets. This is still done on the UDP socket.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[xavier2k6]

keep alive

[xavier2k6]

• #3311

First record/reference of issue with boost::asio::detail::socket_select_interrupter::open_descriptors

[xavier2k6]

We are still getting crash reports of this over at qBittorrent.

[arvidn]

I suspect I would need to not use async_wait() on sockets.