Re: [PATCH net 2/2] net: bridge: fix lockdep multicast_lock false positive splat

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,
-- 
Email: Herbert Xu [off-list ref]
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