panic!() in Filesystem::init() will hang the FS stack - Githubissues

cberner / fuser

Filesystem in Userspace (FUSE) for Rust

MIT License

835 stars 114 forks source link

panic!() in Filesystem::init() will hang the FS stack #271

Open cfstras opened 10 months ago

cfstras commented 10 months ago

I've discovered this by mistake, by having an unwrap() fail in my implementation of init().

As soon as this happens, some bad things occur:

The process running the mount will hang indefinitely
Any process that touches the mountpoint will completely hang (not even terminal output for Ctrl+C etc is shown anymore)
- examples: mount prints every mount up until the fuse line, then hangs
- anything else, such as ls will hang as soon as it encounters the mount
- kill -9 (nor any other kill) seems to help
- pkill -9 macfuse kills the process, but it just gets restarted
- At some point, the whole macOS system will start hanging and become unresponsive (I guess some queue somewhere gets full?)

Workaround: Don't do any work that can panic!() in main?