• Nicolas Dichtel's avatar
    tun: forbid iface creation with rtnl ops · 35b827b6
    Nicolas Dichtel authored
    It's not supported right now (the goal of the initial patch was to support
    'ip link del' only).
    Before the patch:
    $ ip link add foo type tun
    [  239.632660] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
    [  239.636410] RIP: 0010:register_netdevice+0x8e/0x3a0
    This panic occurs because dev->netdev_ops is not set by tun_setup(). But to
    have something usable, it will require more than just setting
    Fixes: f019a7a5
     ("tun: Implement ip link del tunXXX")
    CC: Eric W. Biederman <ebiederm@xmission.com>
    Signed-off-by: default avatarNicolas Dichtel <nicolas.dichtel@6wind.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>