On 26/04/2021 15:48, Herbert Xu wrote: > On Sun, Apr 25, 2021 at 07:45:27PM +0300, Nikolay Aleksandrov wrote: >> >> Ugh.. that's just very ugly. :) The setup you've described above is by all means invalid, but >> possible unfortunately. The bridge already checks if it's being added as a port to another >> bridge, but not through multiple levels of indirection. These locks are completely unrelated >> as they're in very different contexts (different devices). > > Surely we should forbid this? Otherwise what's to stop someone > from creating a loop? > > Cheers, > Indeed that would be best, it's very easy to loop them.