Re: [PATCH net v3] net: bridge: mcast: properly convert mglist to rcu

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski [off-list ref]:

On Thu,  3 Sep 2026 12:38:51 +0300 you wrote:

Sashiko reported a bug [1] that br_multicast_del_port_group unlists the
port group not using proper rcu helper that preserves the next pointer and
after that immediately frees the port group without waiting for rcu grace
period. The only rcu walker of mglist is br_multicast_list_adjacent() and
it turns out that function has always been buggy because mglist was never
properly converted to RCU. Fix it by converting it to rcu and moving its
initialization after eth_addr's. Initializing p->next can use
RCU_INIT_POINTER because we have a barrier from the hlist_add_head_rcu call
later, besides we're initializing an unpublished structure anyway.

[...]

Here is the summary with links:
  - [net,v3] net: bridge: mcast: properly convert mglist to rcu
    https://git.kernel.org/netdev/net/c/4b772869a1e5

You are awesome, thank you!
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