Re: [PATCH net v3] net: bridge: disable MRP ports before the FDB flush in del_nbp()

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@xxxxxxxxxx>:

On Sat, 31 Oct 2026 21:48:40 -0700 you wrote:
> From: Cheng Yongkang <teel4res@xxxxxxxxx>
> 
> del_nbp() flushes the port's FDB entries before it unregisters the RX
> handler. For a normal port, br_stp_disable_port() moves the port to
> BR_STATE_DISABLED before this cleanup.
> 
> That does not hold for an MRP ring port. br_set_state() ignores state
> changes while BR_MRP_AWARE_BIT is set, so br_stp_disable_port() leaves
> the port state alone. br_mrp_port_del() then restores forwarding when
> the bridge is up before clearing the bit. A frame received between
> br_fdb_cleanup_by_dst() and netdev_rx_handler_unregister() can therefore
> create a new FDB entry referencing the dying port. Nothing removes that
> entry before destroy_nbp_rcu() frees the port, so a later frame to the
> learned MAC can be forwarded through the freed port.
> 
> [...]

Here is the summary with links:
  - [net,v3] net: bridge: disable MRP ports before the FDB flush in del_nbp()
    https://git.kernel.org/netdev/net/c/37dfd0efbfff

You are awesome, thank you!
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