Windows 8+ feature, see reply to kbenson above.
# ethtool -i eth0
driver: ixgbevf $ echo "asdf" > foo
$ cat foo
asdf
$ lrwxwrwxrwx 1 root root -> foo
lrwxrwxrwx: command not found
$ cat foo
$
So basically, this zero'd out every executable on the system.