Generally, anything done on userspace level that can result in a crash or reboot, is a bug. So I think it is better to report it as a bug (http://bugzilla.kernel.org) first, before trying to understand the proper logic, which currently may not be implemented correctly. Or it also could be a fault on the particular brand of Linux - in Fedora Core, ifconfig comes under net-tools package, but rightfully it also should not crash the OS. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ