abd6043a2f
- When cancelling ioctls, VFS did not remember which file descriptor to cancel and sent bogus to the driver. - Select state was not cleaned up when select()ing process was interrupted. - Process trying to do a system call at the exact same time as a user trying to interrupt the process, could cause the system call worker thread to overwrite state belonging to the worker thread trying to exit the process. This led to hanging threads and eventual system hang when this happens often enough.