Re: don't allow changing the if_type of tun(4) and tap(4) interfaces from userland

2019-06-10 Thread Claudio Jeker
On Mon, Jun 10, 2019 at 04:19:47PM +1000, David Gwynne wrote: > making tun(4) not IFT_TUNNEL and tap(4) not IFT_ETHER makes for some > interesting possibilities for fun with the rest of the kernel. I think > we should just not allow the if_types to be changed. > > I have another diff somewhere to

don't allow changing the if_type of tun(4) and tap(4) interfaces from userland

2019-06-10 Thread David Gwynne
making tun(4) not IFT_TUNNEL and tap(4) not IFT_ETHER makes for some interesting possibilities for fun with the rest of the kernel. I think we should just not allow the if_types to be changed. I have another diff somewhere to prevent changing the flags (IFF_BROADCAST etc) somewhere too, but we