Unprivileged users can trigger a file-system locking error, causing the system to panic or hang.
When the found file is a symbolic link, this parent must be unlocked before the symbolic link is looked up. This problem results from the test to unlock the parent differing from the test to lock the parent. NetBSD 1.3.3 and prior hang when this bug is exercised. NetBSD-current was enhanced to notice locking problems and thus panics instead of hanging. There are no workarounds for this problem.