Re: [PATCH v3] mctp: route: hold key->lock in mctp_flow_prepare_output()

[patchwork-bot+netdevbpf]

Hello:

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

On Fri,  6 Mar 2026 03:14:02 +0000 you wrote:
> mctp_flow_prepare_output() checks key->dev and may call
> mctp_dev_set_key(), but it does not hold key->lock while doing so.
> 
> mctp_dev_set_key() and mctp_dev_release_key() are annotated with
> __must_hold(&key->lock), so key->dev access is intended to be
> serialized by key->lock. The mctp_sendmsg() transmit path reaches
> mctp_flow_prepare_output() via mctp_local_output() -> mctp_dst_output()
> without holding key->lock, so the check-and-set sequence is racy.
> 
> [...]

Here is the summary with links:
  - [v3] mctp: route: hold key->lock in mctp_flow_prepare_output()
    https://git.kernel.org/netdev/net/c/7d86aa41c073

You are awesome, thank you!
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