On Fri, Oct 09, 2026 at 04:32:54PM +0800, 马云龙 wrote: > Hi Nikolay, Ido, > > When __br_multicast_add_group() creates a new MDB entry and then fails > to create the port group, the new entry is left in the MDB hash table > with no ports, host_joined == false and mp->timer never armed. Nothing > ever removes it, but it still counts towards hash_max. With > mcast_max_groups set on a port, a host behind that port can create > these entries at will by sending IGMP/MLD reports for new groups, and > once the table reaches hash_max the bridge turns multicast snooping > off.
Thanks for the report. I will send a fix.
